mai fouad | Zagazig University (original) (raw)

Papers by mai fouad

Progress In Electromagnetics Research M

In this paper, a novel compact high-gain multi-layer dielectric resonator antenna for ultrawideba... more In this paper, a novel compact high-gain multi-layer dielectric resonator antenna for ultrawideband applications is designed and fabricated. The proposed antenna employs a new technique to make a notch-band for the frequencies within UWB. This technique helps avoid any interference for bands like WLAN and X-band for satellite applications. In this design, several notch bands can get at different frequencies by changing the length of slots. The operating bandwidth of this antenna is between 4.8 GHz and 11.31 GHz with −10 dB return loss and maximum gain of 6 dBi. Finally, the proposed antenna is fabricated and measured to validate the simulation results. The simulation results are obtained by two different simulators; CST Studio suite T M 2020 and HFSS 15 to ensure the validity of the design results before fabrication. The fabricated antenna is measured using Agilent R&S Z67 VNA. There is a good agreement between the simulation and experimental results.

Progress In Electromagnetics Research C, 2015

Nowadays the mobile personal communication systems and wireless networks are commonly used. Exper... more Nowadays the mobile personal communication systems and wireless networks are commonly used. Experience has revealed that the antennas suitable for these applications should have small size and operate in assigned different frequency bands. For this purpose, circularly polarized (CP) multiband square microstrip antenna with three N-slots and a pair of truncated corners is proposed, designed and simulated. To reduce the losses and improve the antenna efficiency in addition to the bandwidth, an efficient electromagnetic band gap (EBG) structure is introduced. The proposed antenna has produced a higher efficiency, an improved operational bandwidth, and a higher gain relative to the conventional microstrip antenna.

This paper proposes a novel multiband Wearable Fractal antenna which suitable for GPS, WiMax and ... more This paper proposes a novel multiband Wearable Fractal antenna which suitable for GPS, WiMax and WiFi (Bluetooth) applications in the same time. This antenna is designed to operate at four resonance frequencies are 1.57, 2.7, 3.4 and 5.3 GHz. The proposed wearable antenna may be attached to life jacket to aid for finding the human body if an accident happened so, the specific absorption ratio (SAR) must be calculated. Therefore anther designed to reduce the SAR value with a spiral metamaterial meandered in the ground plane is introduced. The specific absorption rate (SAR) investigation is carried out on CST2014 Simulator. Maximum SAR value is 0.925 W/Kg which indicates that the wearable antenna are safe for human. The proposed antenna was simulated by CST simulator version 2014 and fabricated by photolithography technique.

2018 22nd International Microwave and Radar Conference (MIKON)

This paper aimed to take closer steps towards real wearability by investigating the possibilities... more This paper aimed to take closer steps towards real wearability by investigating the possibilities of designing and fabricating highly efficient and fully flexible wearable microstrip patch antenna for operating frequency of 5.8 GHz as a center frequency ISM (Industrial, Scientific, and Medical) band. Two types of conducting materials have been used for conducting parts: conventional metal plane and woven electro-textile material, while a non-conducting jeans fabric has been used as antenna substrate material. The dielectric constant εr = 1.78, and loss tangent tanδ = 0.085 of the jeans substrate measured by using two different methods. Also, the electromagnetic properties of the electro-textile are studied in details. A set of comparative results of the proposed design are presented and discussed. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent 8719ES VNA The measured results agree well with the simulated results.

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

In this paper, the design, simulation and fabrication of a ring wearable antenna is presented for... more In this paper, the design, simulation and fabrication of a ring wearable antenna is presented for body-area-network (BAN) applications. A leather flexible textile material is used as substrate material. The dielectric constant εr = 1.79, and loss tangent tanδ = 0.042 of the leather substrate are measured by using two different methods. This is a broad-band CPW-fed monopole antenna which is designed to operate over a frequency band between 1.5–6.5 GHz. This antenna is studied in both free-space and on-body environments. This antenna is fabricated using folded cupper and measured by Agilent 8719ES VNA.

Advances in Systems Analysis, Software Engineering, and High Performance Computing

This chapter focuses on the design of dual band flexible wearable antennas for modern 5G applicat... more This chapter focuses on the design of dual band flexible wearable antennas for modern 5G applications to integrate on a smartwatch. The first is a rectangular antenna which the patch and the ground etched on new flexible material is called ULTRALAM® 3850HT. This antenna is designed to operate at 38 GHz and 60 GHz. The second is a planar inverted-2F wearable antenna pasted on a jeans textile material. Two methods for measuring the dielectric properties of the jeans will be presented. This antenna is designed to operate at 28 GHz and 38 GHz. The SAR (specific absorption ratio) is also introduced and SAR results will be shown. Moreover, the proposed smartwatch under the bent condition will be also studied. These antennas are simulated using HFSS and CST 2018.

Progress In Electromagnetics Research C

This paper aimed to take closer steps towards real wearability by investigating the possibilities... more This paper aimed to take closer steps towards real wearability by investigating the possibilities of designing and fabricating highly efficient and fully flexible wearable microstrip patch antenna for operating frequency of 5.8 GHz as a center frequency. Two types of conducting materials have been used for conducting parts: conventional metal plane and woven electro-textile material, while a non-conducting jeans fabric has been used as antenna substrate material. The dielectric constant ε r = 1.78, and loss tangent tan δ = 0.085 of the jeans substrate measured by using two different methods. Also, the electromagnetic properties of the electro-textile are studied in details. The conductivity of etextile cell is equal to 2.5× 10 6 S/m and the surface impedance of e-textile cell equal to 0.0395+ J18.4 Ω. Furthermore, the proposed wearable antenna may be attached to human body, so the specific absorption ratio (SAR) must be calculated. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent8719ES VNA.

Journal of Physics: Conference Series

In this paper, a dual-band circularly polarized truncated corner microstrip antenna is simulated ... more In this paper, a dual-band circularly polarized truncated corner microstrip antenna is simulated and fabricated to operate over millimeter wave frequencies for modern mobile applications. The propose antenna is designed as monolayer circularly polarized patch antenna fed by single-fed strip-line that has been taken to provide better resonating frequency. Further, this antenna has a high gain to resist the losses in millimeter band. Also, the truncated corners and the L-shaped slots in the proposed antenna have a big effect of the antenna performance. This proposed antenna is simulated by CST 2016. Also, the experimental results are measured by R&S®ZVA67 VNA (Vector Network Analyzer). Finally, the measured and simulated results are more closed to each other.

Journal of Physics: Conference Series

This paper presents a design of dual-band flexible wearable antenna for modern 5G applications to... more This paper presents a design of dual-band flexible wearable antenna for modern 5G applications to integrate on a smartwatch. This antenna is a rectangular antenna which the patch and the ground etched on new flexible material is called “ULTRALAM® 3850HT”. This material is characterized by thin flexible cores with low and stable dielectric constant, which is a key requirement for high frequency and wearable designs. The dielectric constant εr is equal to 3.14, and loss tangent tanδ is equal 0.005 of the ULTRALAM® 3850HT flexible material. The presented antenna is designed to operate at 38 GHz and 60 GHz. The SAR (specific absorption ratio) is also introduced and SAR results will be shown. The presented antenna with and without the smartwatch are simulated using HFSS and CST 2018.

Progress In Electromagnetics Research C

A novel dual-layer ultra-wideband lotus-wearable antenna is presented in this paper for integrati... more A novel dual-layer ultra-wideband lotus-wearable antenna is presented in this paper for integration on astronaut's flight jacket to monitor the vital signs of astronauts. The proposed antenna is designed and fabricated on a leather material as a substrate to operate over a frequency band (2-12 GHz). The dielectric constant ε r = 1.79 and loss tangent tan δ = 0.042 of the leather material are measured by using two different methods. The proposed antenna has three-strip lines in the 2 nd layer for performance enhancement. The stretching effect of the proposed antenna on its impedance characteristics is studied. Furthermore, SAR calculations are performed in on-body environments to ensure that it operates properly in the nearness of the human body. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent 8719ES VNA. The measured results agree well with the simulated ones.

Progress In Electromagnetics Research M, 2017

In this paper, a novel multiband wearable fractal antenna suitable for GPS, WiMax and WiFi (Bluet... more In this paper, a novel multiband wearable fractal antenna suitable for GPS, WiMax and WiFi (Bluetooth) applications is presented. This antenna is designed to operate at four resonance frequencies are 1.57, 2.7, 3.4 and 5.3 GHz. The proposed wearable antenna may be attached to human body, so the specific absorption ratio (SAR) must be calculated. Therefore, another design to reduce SAR value with a spiral metamaterial meandered in the ground plane is introduced. In addition, a wearable fractal antenna system integrated on a life jacket is also presented.

A novel compact circularly-polarized (CP) multi-band square microstrip antenna with diagonal slot... more A novel compact circularly-polarized (CP) multi-band square microstrip antenna with diagonal slots and a pair of truncated corners is introduced. To prevent interference problems due to compact microstrip antenna, an efficient electromagnetic band gap (EBG) structure is included. The EBG is used to reject the surface waves. This rejection of surface waves improves operational band width, gain and directivity. Details of the simulation results are presented and discussed.

Progress In Electromagnetics Research M

In this paper, a novel compact high-gain multi-layer dielectric resonator antenna for ultrawideba... more In this paper, a novel compact high-gain multi-layer dielectric resonator antenna for ultrawideband applications is designed and fabricated. The proposed antenna employs a new technique to make a notch-band for the frequencies within UWB. This technique helps avoid any interference for bands like WLAN and X-band for satellite applications. In this design, several notch bands can get at different frequencies by changing the length of slots. The operating bandwidth of this antenna is between 4.8 GHz and 11.31 GHz with −10 dB return loss and maximum gain of 6 dBi. Finally, the proposed antenna is fabricated and measured to validate the simulation results. The simulation results are obtained by two different simulators; CST Studio suite T M 2020 and HFSS 15 to ensure the validity of the design results before fabrication. The fabricated antenna is measured using Agilent R&S Z67 VNA. There is a good agreement between the simulation and experimental results.

Progress In Electromagnetics Research C, 2015

Nowadays the mobile personal communication systems and wireless networks are commonly used. Exper... more Nowadays the mobile personal communication systems and wireless networks are commonly used. Experience has revealed that the antennas suitable for these applications should have small size and operate in assigned different frequency bands. For this purpose, circularly polarized (CP) multiband square microstrip antenna with three N-slots and a pair of truncated corners is proposed, designed and simulated. To reduce the losses and improve the antenna efficiency in addition to the bandwidth, an efficient electromagnetic band gap (EBG) structure is introduced. The proposed antenna has produced a higher efficiency, an improved operational bandwidth, and a higher gain relative to the conventional microstrip antenna.

This paper proposes a novel multiband Wearable Fractal antenna which suitable for GPS, WiMax and ... more This paper proposes a novel multiband Wearable Fractal antenna which suitable for GPS, WiMax and WiFi (Bluetooth) applications in the same time. This antenna is designed to operate at four resonance frequencies are 1.57, 2.7, 3.4 and 5.3 GHz. The proposed wearable antenna may be attached to life jacket to aid for finding the human body if an accident happened so, the specific absorption ratio (SAR) must be calculated. Therefore anther designed to reduce the SAR value with a spiral metamaterial meandered in the ground plane is introduced. The specific absorption rate (SAR) investigation is carried out on CST2014 Simulator. Maximum SAR value is 0.925 W/Kg which indicates that the wearable antenna are safe for human. The proposed antenna was simulated by CST simulator version 2014 and fabricated by photolithography technique.

2018 22nd International Microwave and Radar Conference (MIKON)

This paper aimed to take closer steps towards real wearability by investigating the possibilities... more This paper aimed to take closer steps towards real wearability by investigating the possibilities of designing and fabricating highly efficient and fully flexible wearable microstrip patch antenna for operating frequency of 5.8 GHz as a center frequency ISM (Industrial, Scientific, and Medical) band. Two types of conducting materials have been used for conducting parts: conventional metal plane and woven electro-textile material, while a non-conducting jeans fabric has been used as antenna substrate material. The dielectric constant εr = 1.78, and loss tangent tanδ = 0.085 of the jeans substrate measured by using two different methods. Also, the electromagnetic properties of the electro-textile are studied in details. A set of comparative results of the proposed design are presented and discussed. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent 8719ES VNA The measured results agree well with the simulated results.

2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting

In this paper, the design, simulation and fabrication of a ring wearable antenna is presented for... more In this paper, the design, simulation and fabrication of a ring wearable antenna is presented for body-area-network (BAN) applications. A leather flexible textile material is used as substrate material. The dielectric constant εr = 1.79, and loss tangent tanδ = 0.042 of the leather substrate are measured by using two different methods. This is a broad-band CPW-fed monopole antenna which is designed to operate over a frequency band between 1.5–6.5 GHz. This antenna is studied in both free-space and on-body environments. This antenna is fabricated using folded cupper and measured by Agilent 8719ES VNA.

Advances in Systems Analysis, Software Engineering, and High Performance Computing

This chapter focuses on the design of dual band flexible wearable antennas for modern 5G applicat... more This chapter focuses on the design of dual band flexible wearable antennas for modern 5G applications to integrate on a smartwatch. The first is a rectangular antenna which the patch and the ground etched on new flexible material is called ULTRALAM® 3850HT. This antenna is designed to operate at 38 GHz and 60 GHz. The second is a planar inverted-2F wearable antenna pasted on a jeans textile material. Two methods for measuring the dielectric properties of the jeans will be presented. This antenna is designed to operate at 28 GHz and 38 GHz. The SAR (specific absorption ratio) is also introduced and SAR results will be shown. Moreover, the proposed smartwatch under the bent condition will be also studied. These antennas are simulated using HFSS and CST 2018.

Progress In Electromagnetics Research C

This paper aimed to take closer steps towards real wearability by investigating the possibilities... more This paper aimed to take closer steps towards real wearability by investigating the possibilities of designing and fabricating highly efficient and fully flexible wearable microstrip patch antenna for operating frequency of 5.8 GHz as a center frequency. Two types of conducting materials have been used for conducting parts: conventional metal plane and woven electro-textile material, while a non-conducting jeans fabric has been used as antenna substrate material. The dielectric constant ε r = 1.78, and loss tangent tan δ = 0.085 of the jeans substrate measured by using two different methods. Also, the electromagnetic properties of the electro-textile are studied in details. The conductivity of etextile cell is equal to 2.5× 10 6 S/m and the surface impedance of e-textile cell equal to 0.0395+ J18.4 Ω. Furthermore, the proposed wearable antenna may be attached to human body, so the specific absorption ratio (SAR) must be calculated. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent8719ES VNA.

Journal of Physics: Conference Series

In this paper, a dual-band circularly polarized truncated corner microstrip antenna is simulated ... more In this paper, a dual-band circularly polarized truncated corner microstrip antenna is simulated and fabricated to operate over millimeter wave frequencies for modern mobile applications. The propose antenna is designed as monolayer circularly polarized patch antenna fed by single-fed strip-line that has been taken to provide better resonating frequency. Further, this antenna has a high gain to resist the losses in millimeter band. Also, the truncated corners and the L-shaped slots in the proposed antenna have a big effect of the antenna performance. This proposed antenna is simulated by CST 2016. Also, the experimental results are measured by R&S®ZVA67 VNA (Vector Network Analyzer). Finally, the measured and simulated results are more closed to each other.

Journal of Physics: Conference Series

This paper presents a design of dual-band flexible wearable antenna for modern 5G applications to... more This paper presents a design of dual-band flexible wearable antenna for modern 5G applications to integrate on a smartwatch. This antenna is a rectangular antenna which the patch and the ground etched on new flexible material is called “ULTRALAM® 3850HT”. This material is characterized by thin flexible cores with low and stable dielectric constant, which is a key requirement for high frequency and wearable designs. The dielectric constant εr is equal to 3.14, and loss tangent tanδ is equal 0.005 of the ULTRALAM® 3850HT flexible material. The presented antenna is designed to operate at 38 GHz and 60 GHz. The SAR (specific absorption ratio) is also introduced and SAR results will be shown. The presented antenna with and without the smartwatch are simulated using HFSS and CST 2018.

Progress In Electromagnetics Research C

A novel dual-layer ultra-wideband lotus-wearable antenna is presented in this paper for integrati... more A novel dual-layer ultra-wideband lotus-wearable antenna is presented in this paper for integration on astronaut's flight jacket to monitor the vital signs of astronauts. The proposed antenna is designed and fabricated on a leather material as a substrate to operate over a frequency band (2-12 GHz). The dielectric constant ε r = 1.79 and loss tangent tan δ = 0.042 of the leather material are measured by using two different methods. The proposed antenna has three-strip lines in the 2 nd layer for performance enhancement. The stretching effect of the proposed antenna on its impedance characteristics is studied. Furthermore, SAR calculations are performed in on-body environments to ensure that it operates properly in the nearness of the human body. Finally, the proposed design is simulated by CST simulator version 2016, fabricated using folded copper and measured by Agilent 8719ES VNA. The measured results agree well with the simulated ones.

Progress In Electromagnetics Research M, 2017

In this paper, a novel multiband wearable fractal antenna suitable for GPS, WiMax and WiFi (Bluet... more In this paper, a novel multiband wearable fractal antenna suitable for GPS, WiMax and WiFi (Bluetooth) applications is presented. This antenna is designed to operate at four resonance frequencies are 1.57, 2.7, 3.4 and 5.3 GHz. The proposed wearable antenna may be attached to human body, so the specific absorption ratio (SAR) must be calculated. Therefore, another design to reduce SAR value with a spiral metamaterial meandered in the ground plane is introduced. In addition, a wearable fractal antenna system integrated on a life jacket is also presented.

A novel compact circularly-polarized (CP) multi-band square microstrip antenna with diagonal slot... more A novel compact circularly-polarized (CP) multi-band square microstrip antenna with diagonal slots and a pair of truncated corners is introduced. To prevent interference problems due to compact microstrip antenna, an efficient electromagnetic band gap (EBG) structure is included. The EBG is used to reject the surface waves. This rejection of surface waves improves operational band width, gain and directivity. Details of the simulation results are presented and discussed.