Md. Shazzadul Islam | International Islamic University Malaysia (original) (raw)
Papers by Md. Shazzadul Islam
SSRN Electronic Journal, 2022
Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at mi... more Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at microwave frequencies in recent years, especially for breast cancer detection (BCD). However, the current technique is with lack of spatial resolution that creates unwanted data while diagnosis. The problem can be overcome by proposing the imaging technique at millimeter-wave (mm-wave) frequencies with wide operating bandwidth. It is known that the antenna plays an important role for the system as it works as antenna sensor to sent RF signal and receive backscattering signal with required information from the desire object, meanwhile, a wideband antenna will make a good impact to the technique. Here, a Coplanar Waveguide (CPW)-fed microstrip antenna has been designed, realized on flexible Polyimide substrate and furthermore simulated in CST MWS at mm-wave frequencies. The antenna has achieved a wide-10 dB bandwidth of 18.7 GHz (from 21 GHz to 39.7 GHz) at the resonant frequency of 30 GHz, with an average antenna gain of 4 dBi for the entire operating bandwidth. It has a bidirectional radiation pattern at the boresight and average radiation efficiency of above 80% for whole bandwidth with peak efficiency of more than 90% at the resonant frequency. The antenna is small, low in cost and easy to fabricate, which makes it suitable for the EMI technique at mm-wave frequencies for BCD.
Engineering Science and Technology, an International Journal, 2022
This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is... more This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is designed with an elliptical slot inserted in a rectangular patch by utilizing the coplanar waveguide (CPW) feeding technique on a polyimide substrate. The proposed antenna operates within 7-14 GHz (S 11 < À 10 dB) with a minimum return loss is observed as low as-58 dB by simulation, whereas the entire X-band is covered by the-20 dB bandwidth while maintaining an excellent VSWR of almost 1. Also, the antenna exhibits an average gain of 4 dBi while the average radiation efficiency is 92%. The maximum SAR of the proposed antenna for 1 g mass is below 1.0 W/Kg throughout the entire bandwidth. To observe flexibility, four different bending conditions of the antenna have been analyzed. For experimentation, the antenna has been realized as a prototype by using a low-cost fabrication process. The measurement reveals that the prototype has a À10 dB bandwidth of 5.4 GHz. During In-Vivo test, over the variation of 0 $ 3 mm distance between the antenna-prototype and the human chest/chicken breast tissue, the best performance is obtained at 3 mm in terms of the return loss. One of the significant features of the proposed design is its measured average and peak gain of 4.4 dBi and of 6.33 dBi respectively with a measured average efficiency of 65%. The proposed antenna has a compact size of 13  13 mm 2 (0:35k g  0:35k g), and its performance remains nominally constant even under different bending conditions which makes the antenna suitable for biomedical imaging applications. A new figure-of-merit has been introduced to evaluate the overall performance based on different antenna key parameters. The fabricated antenna would contribute to the future biomedical research by utilizing X-band frequencies.
2021 Innovations in Power and Advanced Computing Technologies (i-PACT), 2021
Here, a 2 × 2 MIMO array of a sequentially rotated monopole antenna (SRMA) is proposed for cellul... more Here, a 2 × 2 MIMO array of a sequentially rotated monopole antenna (SRMA) is proposed for cellular communication. The proposed four-element array is designed with a single modified planar monopole antenna (MPMA). Over a partial ground plane, three semi-circular slots are designed on the top patch to propose the antenna for reserving the 5G Sub-6 GHz NR frequency Bands n77/n78/n79 ($S$11 < −10dB). The antenna offers a gain of 3 dBi (realized) with a radiation efficiency better than 95% by a quasi-omnidirectional radiation pattern. Afterwards, the antenna is used to configure a 2 × 2 MIMO array on a 150×75 mm2smartphone mainboard with polarization diversity. The proposed MIMO has more than 21 dB isolation among the antenna elements. The array of this work exhibits 5.5 dBi peak gain with a quasi-omnidirectional radiation pattern to all four directions of the phone board. Moreover, an excellent envelop correlation coefficient below 0.0012 and diversity gain of around 10 are found with the MIMO array for the whole operating bandwidth. The design proposed in this work should motivate the researcher and industrial engineers to develop MIMO arrays with high performance in 5G smartphones.
2018 7th International Conference on Computer and Communication Engineering (ICCCE), 2018
2020 IEEE Region 10 Symposium (TENSYMP), 2020
2020 IEEE Region 10 Symposium (TENSYMP), 2020
A 2 × 2 non-uniform planar array with a new technique of array arrangement has been proposed in t... more A 2 × 2 non-uniform planar array with a new technique of array arrangement has been proposed in this paper. The proposed non-uniform array has been achieved by shifting the second-row elements with a change of certain angle with respect to the elements in the first row. After optimizing the angle using CST MWS, the proposed array has achieved a peak realized gain of 12.06 dB with the highest radiation efficiency of 88.26% at 5.8 GHz. New non-uniform array configuration has achieved a low sidelobe level of − 23.1 dB by reducing the mutual coupling effect. A high directivity of 12.61 dBi with more than 20.5 dB isolation at the resonate frequency and − 37 dB minimum return loss makes it suitable for high data rate MIMO applications. Moreover, the size of the array can also be extended to a large array with a flexible shape.
Breast cancer is the most diagnosed cancer among women all over the world after skin cancer. Mean... more Breast cancer is the most diagnosed cancer among women all over the world after skin cancer. Meanwhile, electromagnetic imaging has been a prominent detection technique for biomedical diagnosis in recent years. However, the electromagnetic imaging is struggling with the spatial resolution that can be solved by an imaging technique based on the antenna with a wide operating bandwidth at the higher frequency range. In this paper, a printable Coplanar Waveguide (CPW)-fed microstrip rectangular patch antenna with a wide – 10 dB bandwidth of 18.7 GHz has been proposed for a breast cancer imaging application. This printable antenna, after being designed on a flexible substrate and simulated, operates from 21 GHz to 39.7 GHz which covers the millimeter-wave frequencies. The antenna has achieved an average gain of 4 dBi with an average radiation efficiency of over 80% for the entire -10 dB bandwidth. The bidirectional radiation pattern of the antenna offers the freedom of placing the antenn...
The proposed assembly comprises of 2 × 2 antenna elements with defected ground structure (DGS) to... more The proposed assembly comprises of 2 × 2 antenna elements with defected ground structure (DGS) to resonate at 5.8 GHz for WLAN application, where each antenna element excited by inset feeding technique. The proposed MIMO array has achieved - 10 dB bandwidth of 85 MHz with 36.5% reduction in antenna area with similar radiating element. Besides, the proposed design also achieved high radiation efficiency of 95% with a peak directivity of 11.94 dBi. The antenna resonates at the designated frequency with a minimum return loss of - 42dB. The results include parametric study by subtracting more slots from the ground and placed them in horizontal direction. The obtained antenna array can be used for WLAN application with low manufacturing cost.
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2021
Recently lower frequency band 4.5-5.5 GHz is proposed by the ASEAN countries for 5G cellular appl... more Recently lower frequency band 4.5-5.5 GHz is proposed by the ASEAN countries for 5G cellular application and therefore, it is essential of designing an ultra-wideband (UWB) antenna for the particular band-notched characteristics. In this article, a compact tuning fork shape ultra-wideband (UWB) patch antenna with a variable band-notched characteristic has been proposed for 5G cellular application. The UWB antenna has been achieved
Electronics Letters, 2020
PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON ELECTRONIC DEVICES, SYSTEMS AND APPLICATIONS (ICEDSA2020), 2020
As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array ... more As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array now become a vital issue. Mostly, researchers have used a planar antenna array to get a high directive antenna with better performances. However, the planar array's gain is limited. It contributes high sidelobe levels and strong mutual coupling effects those need to overcome. In this paper, a new configuration of 4 elements circular equivalent planar array has been proposed to achieve high gain and directivity with lower sidelobe level. After being designed and simulated, the proposed antenna array has achieved high directivity of 15.3 dBi with 85 % radiation efficiency. Besides, the array has a maximum realized gain of 14.51 dB and low sidelobe level of-15.1 dB. In turn, the high directivity of the proposed antenna array resonating at 5.8 GHz with very minimum return loss makes it suitable for Radar application.
PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON ELECTRONIC DEVICES, SYSTEMS AND APPLICATIONS (ICEDSA2020), 2020
Fifth-generation (5G) forums in ASEAN countries have proposed lower frequency bands for 5G applic... more Fifth-generation (5G) forums in ASEAN countries have proposed lower frequency bands for 5G applications at 4.5 – 5.5 GHz and also the fixed-satellite service (FSS) has realised 3.3 – 3.8 GHz in C-band for 5G cellular communication recently, which leads the necessity of proposing antennas for the particular bands. In this paper, a compact ultra-wideband (UWB) patch antenna with dual band-notched characteristics has been proposed for lower 5G bands. The UWB has been achieved with a partial ground plane and further two notched 5G bands have been obtained with a rectangular slot on the patch and by connecting an arc shape open loop (ASOL) on top of the patch. The antenna has achieved a wide – 10 dB bandwidth of around 12.4 GHz (2.91 – 15.3 GHz) and VSWR < 2 except for two notched lower 5G bands of 3.3 – 4.2 GHz and 4.5 – 5.5 GHz. Besides, the proposed antenna has achieved a peak radiation efficiency of more than 80 % for UWB, while, at the notched bands as low as 40%. Moreover, the proposed antenna is compact with a dimension of 29×23 mm2 that makes it suitable for lower 5G bands application.
International Journal of Advanced Computer Science and Applications, 2020
International Journal of Advanced Computer Science and Applications, 2020
In line with the harvested energy required for the emerging 5G technology, this article proposes ... more In line with the harvested energy required for the emerging 5G technology, this article proposes a planar monopole antenna and a rectifier. The proposed Coplanar Waveguide (CPW)-fed antenna is printable on a transparent Poly-Ethylene Terephthalate (PET) substrate. The antenna has a center frequency at 3.51 GHz within a bandwidth of 307 MHz that covers the pioneer 5G band in Malaysia. The designed omnidirectional antenna exhibits the maximum gain of 1.51 dBi with a total efficiency of 95.17 percent. At the antenna frequency, a rectifier has been designed with the voltage doubler technique on a Rogers RO3003 substrate. Over an input RF power of 0 dBm, the rectifier has a power conversion efficiency around 42 percent. The proposed antenna rejects harmonics at least until 16 GHz frequency that makes it compatible with the rectifier to eliminate an additional bandpass filter or impedance matching network from the energy harvesting system.
Bulletin of Electrical Engineering and Informatics, 2019
In this article, a miniaturized hairpin resonator has been presented to introduce the high select... more In this article, a miniaturized hairpin resonator has been presented to introduce the high selectivity of Wireless Local Area Network (WLAN) bandwidth. In the construction of the hairpin resonator, short-circuited comb-lines are electrically coupled with the two longer edges of a rectangular-shaped loop. The hairpin resonator has been designed and fabricated with the Taconic TLX-8 substrate with a center-frequency at 2.45 GHz. The resonator exhibits a second order quasi-Chebyshev bandpass response. A low insertion loss has been found as -0.36 dB with a minimum return loss as -36.71 dB. The filtering dimension of this hairpin resonator occupies a small area of 166.82 mm2. This hairpin resonator is highly selective for the bandpass applications of the entire WLAN bandwidth.
In this paper, a new configuration of four elements circular equivalent planar array has been pro... more In this paper, a new configuration of four elements circular equivalent planar array has been proposed to achieve high gain and directivity with lower sidelobe level. After being designed and simulated, the proposed antenna array has achieved high directivity of 15.3 dBi with 85 % radiation efficiency. Besides, the array has a maximum realized gain of 14.51 dB and low sidelobe level of − 16 dB. The proposed antenna array has been evaluated by comparing its performances with four elements of MIMO and planar antenna arrays. It is observed that the proposed array shows greater performances in terms of all parameters compared to the other two arrays. Also, the proposed array has maximum isolation of below − 35 dB between two nearby elements. In turn, the high directivity of the proposed antenna array resonating at 5.8 GHz with very minimum return loss which makes it suitable for Radar application. Contribution-High gain and directivity have been achieved by proposing a new Circular Equi...
Elsevier B.V., 2022
This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is... more This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is designed with an elliptical slot inserted in a rectangular patch by utilizing the coplanar waveguide (CPW) feeding technique on a polyimide substrate. The proposed antenna operates within 7-14 GHz (S 11 < À 10 dB) with a minimum return loss is observed as low as-58 dB by simulation, whereas the entire X-band is covered by the-20 dB bandwidth while maintaining an excellent VSWR of almost 1. Also, the antenna exhibits an average gain of 4 dBi while the average radiation efficiency is 92%. The maximum SAR of the proposed antenna for 1 g mass is below 1.0 W/Kg throughout the entire bandwidth. To observe flexibility, four different bending conditions of the antenna have been analyzed. For experimentation, the antenna has been realized as a prototype by using a low-cost fabrication process. The measurement reveals that the prototype has a À10 dB bandwidth of 5.4 GHz. During In-Vivo test, over the variation of 0 $ 3 mm distance between the antenna-prototype and the human chest/chicken breast tissue, the best performance is obtained at 3 mm in terms of the return loss. One of the significant features of the proposed design is its measured average and peak gain of 4.4 dBi and of 6.33 dBi respectively with a measured average efficiency of 65%. The proposed antenna has a compact size of 13  13 mm 2 (0:35k g  0:35k g), and its performance remains nominally constant even under different bending conditions which makes the antenna suitable for biomedical imaging applications. A new figure-of-merit has been introduced to evaluate the overall performance based on different antenna key parameters. The fabricated antenna would contribute to the future biomedical research by utilizing X-band frequencies.
TELKOMNIKA Telecommunication, Computing, Electronics and Control, 2021
Recently lower frequency band 4.5 − 5.5 GHz is proposed by the ASEAN countries for 5G cellular ap... more Recently lower frequency band 4.5 − 5.5 GHz is proposed by the ASEAN countries for 5G cellular application and therefore, it is essential of designing an ultra-wideband (UWB) antenna for the particular band-notched characteristics. In this article, a compact tuning fork shape ultra-wideband (UWB) patch antenna with a variable band-notched characteristic has been proposed for 5G cellular application. The UWB antenna has been achieved by using a tuning fork shape with a simple partial ground plane. A pair of ring shape slits (RSS) on the ground plane has been added to achieve the band-notched characteristic. The proposed antenna has achieved a large −10 dB bandwidth of 7.8 GHz (2.9 − 11 GHz) and the VSWR value is less than 2 for the entire bandwidth excepted for notched frequency bands of lower 5G bands (4.5 − 5.5 GHz). Moreover, the antenna has a peak radiation efficiency of more than 87% for UWB and less than 27% for the notched frequency band. The notched-band is shifted with the change in the position of RSS's within the vertical axis and thus, the variable band-notched characteristics have been achieved. Besides, the proposed antenna is compact with the dimension of 45 × 34 mm 2 that makes it suitable for the lower band of 5G application. Keywords: Notched-band Patch antenna Tuning fork UWB This is an open access article under the CC BY-SA license.
SSRN Electronic Journal, 2022
Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at mi... more Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at microwave frequencies in recent years, especially for breast cancer detection (BCD). However, the current technique is with lack of spatial resolution that creates unwanted data while diagnosis. The problem can be overcome by proposing the imaging technique at millimeter-wave (mm-wave) frequencies with wide operating bandwidth. It is known that the antenna plays an important role for the system as it works as antenna sensor to sent RF signal and receive backscattering signal with required information from the desire object, meanwhile, a wideband antenna will make a good impact to the technique. Here, a Coplanar Waveguide (CPW)-fed microstrip antenna has been designed, realized on flexible Polyimide substrate and furthermore simulated in CST MWS at mm-wave frequencies. The antenna has achieved a wide-10 dB bandwidth of 18.7 GHz (from 21 GHz to 39.7 GHz) at the resonant frequency of 30 GHz, with an average antenna gain of 4 dBi for the entire operating bandwidth. It has a bidirectional radiation pattern at the boresight and average radiation efficiency of above 80% for whole bandwidth with peak efficiency of more than 90% at the resonant frequency. The antenna is small, low in cost and easy to fabricate, which makes it suitable for the EMI technique at mm-wave frequencies for BCD.
Engineering Science and Technology, an International Journal, 2022
This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is... more This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is designed with an elliptical slot inserted in a rectangular patch by utilizing the coplanar waveguide (CPW) feeding technique on a polyimide substrate. The proposed antenna operates within 7-14 GHz (S 11 < À 10 dB) with a minimum return loss is observed as low as-58 dB by simulation, whereas the entire X-band is covered by the-20 dB bandwidth while maintaining an excellent VSWR of almost 1. Also, the antenna exhibits an average gain of 4 dBi while the average radiation efficiency is 92%. The maximum SAR of the proposed antenna for 1 g mass is below 1.0 W/Kg throughout the entire bandwidth. To observe flexibility, four different bending conditions of the antenna have been analyzed. For experimentation, the antenna has been realized as a prototype by using a low-cost fabrication process. The measurement reveals that the prototype has a À10 dB bandwidth of 5.4 GHz. During In-Vivo test, over the variation of 0 $ 3 mm distance between the antenna-prototype and the human chest/chicken breast tissue, the best performance is obtained at 3 mm in terms of the return loss. One of the significant features of the proposed design is its measured average and peak gain of 4.4 dBi and of 6.33 dBi respectively with a measured average efficiency of 65%. The proposed antenna has a compact size of 13  13 mm 2 (0:35k g  0:35k g), and its performance remains nominally constant even under different bending conditions which makes the antenna suitable for biomedical imaging applications. A new figure-of-merit has been introduced to evaluate the overall performance based on different antenna key parameters. The fabricated antenna would contribute to the future biomedical research by utilizing X-band frequencies.
2021 Innovations in Power and Advanced Computing Technologies (i-PACT), 2021
Here, a 2 × 2 MIMO array of a sequentially rotated monopole antenna (SRMA) is proposed for cellul... more Here, a 2 × 2 MIMO array of a sequentially rotated monopole antenna (SRMA) is proposed for cellular communication. The proposed four-element array is designed with a single modified planar monopole antenna (MPMA). Over a partial ground plane, three semi-circular slots are designed on the top patch to propose the antenna for reserving the 5G Sub-6 GHz NR frequency Bands n77/n78/n79 ($S$11 < −10dB). The antenna offers a gain of 3 dBi (realized) with a radiation efficiency better than 95% by a quasi-omnidirectional radiation pattern. Afterwards, the antenna is used to configure a 2 × 2 MIMO array on a 150×75 mm2smartphone mainboard with polarization diversity. The proposed MIMO has more than 21 dB isolation among the antenna elements. The array of this work exhibits 5.5 dBi peak gain with a quasi-omnidirectional radiation pattern to all four directions of the phone board. Moreover, an excellent envelop correlation coefficient below 0.0012 and diversity gain of around 10 are found with the MIMO array for the whole operating bandwidth. The design proposed in this work should motivate the researcher and industrial engineers to develop MIMO arrays with high performance in 5G smartphones.
2018 7th International Conference on Computer and Communication Engineering (ICCCE), 2018
2020 IEEE Region 10 Symposium (TENSYMP), 2020
2020 IEEE Region 10 Symposium (TENSYMP), 2020
A 2 × 2 non-uniform planar array with a new technique of array arrangement has been proposed in t... more A 2 × 2 non-uniform planar array with a new technique of array arrangement has been proposed in this paper. The proposed non-uniform array has been achieved by shifting the second-row elements with a change of certain angle with respect to the elements in the first row. After optimizing the angle using CST MWS, the proposed array has achieved a peak realized gain of 12.06 dB with the highest radiation efficiency of 88.26% at 5.8 GHz. New non-uniform array configuration has achieved a low sidelobe level of − 23.1 dB by reducing the mutual coupling effect. A high directivity of 12.61 dBi with more than 20.5 dB isolation at the resonate frequency and − 37 dB minimum return loss makes it suitable for high data rate MIMO applications. Moreover, the size of the array can also be extended to a large array with a flexible shape.
Breast cancer is the most diagnosed cancer among women all over the world after skin cancer. Mean... more Breast cancer is the most diagnosed cancer among women all over the world after skin cancer. Meanwhile, electromagnetic imaging has been a prominent detection technique for biomedical diagnosis in recent years. However, the electromagnetic imaging is struggling with the spatial resolution that can be solved by an imaging technique based on the antenna with a wide operating bandwidth at the higher frequency range. In this paper, a printable Coplanar Waveguide (CPW)-fed microstrip rectangular patch antenna with a wide – 10 dB bandwidth of 18.7 GHz has been proposed for a breast cancer imaging application. This printable antenna, after being designed on a flexible substrate and simulated, operates from 21 GHz to 39.7 GHz which covers the millimeter-wave frequencies. The antenna has achieved an average gain of 4 dBi with an average radiation efficiency of over 80% for the entire -10 dB bandwidth. The bidirectional radiation pattern of the antenna offers the freedom of placing the antenn...
The proposed assembly comprises of 2 × 2 antenna elements with defected ground structure (DGS) to... more The proposed assembly comprises of 2 × 2 antenna elements with defected ground structure (DGS) to resonate at 5.8 GHz for WLAN application, where each antenna element excited by inset feeding technique. The proposed MIMO array has achieved - 10 dB bandwidth of 85 MHz with 36.5% reduction in antenna area with similar radiating element. Besides, the proposed design also achieved high radiation efficiency of 95% with a peak directivity of 11.94 dBi. The antenna resonates at the designated frequency with a minimum return loss of - 42dB. The results include parametric study by subtracting more slots from the ground and placed them in horizontal direction. The obtained antenna array can be used for WLAN application with low manufacturing cost.
TELKOMNIKA (Telecommunication Computing Electronics and Control), 2021
Recently lower frequency band 4.5-5.5 GHz is proposed by the ASEAN countries for 5G cellular appl... more Recently lower frequency band 4.5-5.5 GHz is proposed by the ASEAN countries for 5G cellular application and therefore, it is essential of designing an ultra-wideband (UWB) antenna for the particular band-notched characteristics. In this article, a compact tuning fork shape ultra-wideband (UWB) patch antenna with a variable band-notched characteristic has been proposed for 5G cellular application. The UWB antenna has been achieved
Electronics Letters, 2020
PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON ELECTRONIC DEVICES, SYSTEMS AND APPLICATIONS (ICEDSA2020), 2020
As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array ... more As the spectrum demand increasing with time, so, the directivity and efficiency of antenna array now become a vital issue. Mostly, researchers have used a planar antenna array to get a high directive antenna with better performances. However, the planar array's gain is limited. It contributes high sidelobe levels and strong mutual coupling effects those need to overcome. In this paper, a new configuration of 4 elements circular equivalent planar array has been proposed to achieve high gain and directivity with lower sidelobe level. After being designed and simulated, the proposed antenna array has achieved high directivity of 15.3 dBi with 85 % radiation efficiency. Besides, the array has a maximum realized gain of 14.51 dB and low sidelobe level of-15.1 dB. In turn, the high directivity of the proposed antenna array resonating at 5.8 GHz with very minimum return loss makes it suitable for Radar application.
PROCEEDINGS OF THE 7TH INTERNATIONAL CONFERENCE ON ELECTRONIC DEVICES, SYSTEMS AND APPLICATIONS (ICEDSA2020), 2020
Fifth-generation (5G) forums in ASEAN countries have proposed lower frequency bands for 5G applic... more Fifth-generation (5G) forums in ASEAN countries have proposed lower frequency bands for 5G applications at 4.5 – 5.5 GHz and also the fixed-satellite service (FSS) has realised 3.3 – 3.8 GHz in C-band for 5G cellular communication recently, which leads the necessity of proposing antennas for the particular bands. In this paper, a compact ultra-wideband (UWB) patch antenna with dual band-notched characteristics has been proposed for lower 5G bands. The UWB has been achieved with a partial ground plane and further two notched 5G bands have been obtained with a rectangular slot on the patch and by connecting an arc shape open loop (ASOL) on top of the patch. The antenna has achieved a wide – 10 dB bandwidth of around 12.4 GHz (2.91 – 15.3 GHz) and VSWR < 2 except for two notched lower 5G bands of 3.3 – 4.2 GHz and 4.5 – 5.5 GHz. Besides, the proposed antenna has achieved a peak radiation efficiency of more than 80 % for UWB, while, at the notched bands as low as 40%. Moreover, the proposed antenna is compact with a dimension of 29×23 mm2 that makes it suitable for lower 5G bands application.
International Journal of Advanced Computer Science and Applications, 2020
International Journal of Advanced Computer Science and Applications, 2020
In line with the harvested energy required for the emerging 5G technology, this article proposes ... more In line with the harvested energy required for the emerging 5G technology, this article proposes a planar monopole antenna and a rectifier. The proposed Coplanar Waveguide (CPW)-fed antenna is printable on a transparent Poly-Ethylene Terephthalate (PET) substrate. The antenna has a center frequency at 3.51 GHz within a bandwidth of 307 MHz that covers the pioneer 5G band in Malaysia. The designed omnidirectional antenna exhibits the maximum gain of 1.51 dBi with a total efficiency of 95.17 percent. At the antenna frequency, a rectifier has been designed with the voltage doubler technique on a Rogers RO3003 substrate. Over an input RF power of 0 dBm, the rectifier has a power conversion efficiency around 42 percent. The proposed antenna rejects harmonics at least until 16 GHz frequency that makes it compatible with the rectifier to eliminate an additional bandpass filter or impedance matching network from the energy harvesting system.
Bulletin of Electrical Engineering and Informatics, 2019
In this article, a miniaturized hairpin resonator has been presented to introduce the high select... more In this article, a miniaturized hairpin resonator has been presented to introduce the high selectivity of Wireless Local Area Network (WLAN) bandwidth. In the construction of the hairpin resonator, short-circuited comb-lines are electrically coupled with the two longer edges of a rectangular-shaped loop. The hairpin resonator has been designed and fabricated with the Taconic TLX-8 substrate with a center-frequency at 2.45 GHz. The resonator exhibits a second order quasi-Chebyshev bandpass response. A low insertion loss has been found as -0.36 dB with a minimum return loss as -36.71 dB. The filtering dimension of this hairpin resonator occupies a small area of 166.82 mm2. This hairpin resonator is highly selective for the bandpass applications of the entire WLAN bandwidth.
In this paper, a new configuration of four elements circular equivalent planar array has been pro... more In this paper, a new configuration of four elements circular equivalent planar array has been proposed to achieve high gain and directivity with lower sidelobe level. After being designed and simulated, the proposed antenna array has achieved high directivity of 15.3 dBi with 85 % radiation efficiency. Besides, the array has a maximum realized gain of 14.51 dB and low sidelobe level of − 16 dB. The proposed antenna array has been evaluated by comparing its performances with four elements of MIMO and planar antenna arrays. It is observed that the proposed array shows greater performances in terms of all parameters compared to the other two arrays. Also, the proposed array has maximum isolation of below − 35 dB between two nearby elements. In turn, the high directivity of the proposed antenna array resonating at 5.8 GHz with very minimum return loss which makes it suitable for Radar application. Contribution-High gain and directivity have been achieved by proposing a new Circular Equi...
Elsevier B.V., 2022
This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is... more This article proposes a low profile planar monopole antenna on flexible substrate. The antenna is designed with an elliptical slot inserted in a rectangular patch by utilizing the coplanar waveguide (CPW) feeding technique on a polyimide substrate. The proposed antenna operates within 7-14 GHz (S 11 < À 10 dB) with a minimum return loss is observed as low as-58 dB by simulation, whereas the entire X-band is covered by the-20 dB bandwidth while maintaining an excellent VSWR of almost 1. Also, the antenna exhibits an average gain of 4 dBi while the average radiation efficiency is 92%. The maximum SAR of the proposed antenna for 1 g mass is below 1.0 W/Kg throughout the entire bandwidth. To observe flexibility, four different bending conditions of the antenna have been analyzed. For experimentation, the antenna has been realized as a prototype by using a low-cost fabrication process. The measurement reveals that the prototype has a À10 dB bandwidth of 5.4 GHz. During In-Vivo test, over the variation of 0 $ 3 mm distance between the antenna-prototype and the human chest/chicken breast tissue, the best performance is obtained at 3 mm in terms of the return loss. One of the significant features of the proposed design is its measured average and peak gain of 4.4 dBi and of 6.33 dBi respectively with a measured average efficiency of 65%. The proposed antenna has a compact size of 13  13 mm 2 (0:35k g  0:35k g), and its performance remains nominally constant even under different bending conditions which makes the antenna suitable for biomedical imaging applications. A new figure-of-merit has been introduced to evaluate the overall performance based on different antenna key parameters. The fabricated antenna would contribute to the future biomedical research by utilizing X-band frequencies.
TELKOMNIKA Telecommunication, Computing, Electronics and Control, 2021
Recently lower frequency band 4.5 − 5.5 GHz is proposed by the ASEAN countries for 5G cellular ap... more Recently lower frequency band 4.5 − 5.5 GHz is proposed by the ASEAN countries for 5G cellular application and therefore, it is essential of designing an ultra-wideband (UWB) antenna for the particular band-notched characteristics. In this article, a compact tuning fork shape ultra-wideband (UWB) patch antenna with a variable band-notched characteristic has been proposed for 5G cellular application. The UWB antenna has been achieved by using a tuning fork shape with a simple partial ground plane. A pair of ring shape slits (RSS) on the ground plane has been added to achieve the band-notched characteristic. The proposed antenna has achieved a large −10 dB bandwidth of 7.8 GHz (2.9 − 11 GHz) and the VSWR value is less than 2 for the entire bandwidth excepted for notched frequency bands of lower 5G bands (4.5 − 5.5 GHz). Moreover, the antenna has a peak radiation efficiency of more than 87% for UWB and less than 27% for the notched frequency band. The notched-band is shifted with the change in the position of RSS's within the vertical axis and thus, the variable band-notched characteristics have been achieved. Besides, the proposed antenna is compact with the dimension of 45 × 34 mm 2 that makes it suitable for the lower band of 5G application. Keywords: Notched-band Patch antenna Tuning fork UWB This is an open access article under the CC BY-SA license.
Poster, 2019
Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at mi... more Electromagnetic Imaging (EMI) has become a significant technique for biomedical application at microwave frequencies in recent years, especially for breast cancer detection (BCD). However, the current technique is with lack of spatial resolution that creates unwanted data while diagnosis. The problem can be overcome by proposing the imaging technique at millimeter-wave (mm-wave) frequencies with wide operating bandwidth. It is known that the antenna plays an important role for the system as it works as antenna sensor to sent RF signal and receive backscattering signal with required information from the desire object, meanwhile, a wideband antenna will make a good impact to the technique. Here, a Coplanar Waveguide (CPW)-fed microstrip antenna has been designed, realized on flexible Polyimide substrate and furthermore simulated in CST MWS at mm-wave frequencies. The antenna has achieved a wide-10 dB bandwidth of 18.7 GHz (from 21 GHz to 39.7 GHz) at the resonant frequency of 30 GHz, with an average antenna gain of 4 dBi for the entire operating bandwidth. It has a bidirectional radiation pattern at the boresight and average radiation efficiency of above 80% for whole bandwidth with peak efficiency of more than 90% at the resonant frequency. The antenna is small, low in cost and easy to fabricate, which makes it suitable for the EMI technique at mm-wave frequencies for BCD.