Circular slot antenna for triband application (original) (raw)
Related papers
A Slotted Circular Monopole Antenna for Wireless Applications
International Journal of Wireless Communications and Mobile Computing, 2014
In this paper, a compact slotted circular monopole antenna with spike shaped slots embedded in it is presented. Also, the proposed antenna has ground length limited to 33% of substrate length. This ground is provided on the back side of the antenna geometry to excite the antenna by microstrip line feed. A slotted circular patch element will be achieved by subtracting 45 degrees rotated square patch of 12mm x 12mm, and then by proper scaling. In this study the geometry is scaled separately by 60%, 40%, 20%, and finally the resultant is obtained by uniting them. This final geometry offers an ultra wide band operation. The overall size of the antenna is 30mm×32.4mm×1.6mm including finite ground feeding mechanism. The antenna operates in the frequency range from 2.5-15GHz covering FCC defined UWB band with more than 130% impedance bandwidth. Stable omni-directional radiation patterns in the desired frequency band have been obtained. Measured data fairly agree with the simulated results.
Tri-Band Circularly Polarized Monopole Antenna for Wireless Communication Application
Radioelectronics and Communications Systems, 2020
A circularly polarized (CP) CPW-fed (CoPlanar Waveguide) with two asymmetric U-shaped strips, patch antenna is described in this paper. The antenna consists of a radiating patch composed of a hexagonal-ring connected with two annular rings on the two corners, which provide wide CP. The CPW-fed antenna was constructed by etching out two L-shaped slots and adding two asymmetric U-shaped strips to the ground, which greatly enhanced both the impedance bandwidth (IBW) and axial ratio bandwidth (ARBW). The proposed antenna design yields a measured wide IBW = 5.637 GHz (4.484-10.121 GHz), which is about 80.53% with respect to the center frequency f c = 7.3 GHz. The simulated 3-dB axial ratio (AR) bandwidth for tri bands includes 95 MHz (1.37%), 186 MHz (2.35%) and 149 MHz (1.67%) resonating at 6.95, 7.93, and 8.91 GHz, respectively. The radiation characteristics of the implemented antenna have been analyzed and discussed in this paper. The maximum simulated peak gain is 5.968 dBi at 6.063 GHz. The proposed antenna can be suitable for C-and X-band wireless communication applications.
2020
In this work, new structures of circular microstrip antenna based on slots are designed and simulated to operate with triple band applications. These slots are annular ring and rectangular shapes in different sizes. The annular ring slot is etched inside the circular patch while the other two rectangular slots are etched on the circular patch edge. The suggested antennas are simulated using version 13 of Ansoft High Frequency Structure Simulator (HFSS). The various parameters such as input impedance, reflection coefficient, gain, radiation patterns and surface currents were investigated. The present results observed that the optimum antenna designed is resonating at three frequencies 2.695, 5.799 and 8.323 GHz. Also, the bandwidths of simulated reflection coefficients at -10 dB are 106, 204 and 371 MHz which are identical with the S-, C- and X-bands frequencies, respectively. Therefore, the optimum antenna designed can be used in the space saving applications in addition to its impo...
Design & Simulation of a Planar Monopole Antenna based on Double E &T Shape Slots
This paper presents the design of the multiband microstrip antenna for wireless communication system. The proposed antenna is particularly attractive for WLAN/WiMAX devices that integrate multiple systems. The overall size of the design is 48 mm x 35.2 mm x 1.6 mm with a volumetric size of 2.7 cm 3. The proposed designed antenna covers the three frequency bands from 2.3 GHz to 2.8 GHz and from 3.1 GHz to 3.16 GHz (lower-frequency band) and 4.71 GHz to 6.4 GHz (upper-frequency band) such that total bandwidth of the proposed antenna is 2.3 GHz. The parametric study is performed to understand the characteristics of the proposed antenna. Also, good antenna performances such as radiation patterns and antenna gains over the operating bands have been observed. The maximum simulated gain of the proposed antenna is 5.73 dBi at 5.58 GHz band.
Design and Analysis of Circular Slotted Microstrip Patch Antenna
International Journal of Electronics and Telecommunications, 2019
This paper presents a novel complementary CPWfed slotted microstrip patch antenna for operation at 2.4 GHz, 5.2 GHz and 6.3 GHz frequencies. The primary structure consists of the complementary split ring resonator slots on a patch and the design is fabricated on FR-4 epoxy substrate with substrate thickness of 1.6 mm. The described structure lacks the presence of a ground plane and makes use of a number of circular complementary SRRs along with rectangular slots on the radiating patch. The structure provides a wide bandwidth of around 390 MHz, 470 MHz and 600 MHz at the three bands with return losses of -11.5 dB, -24.3996dB and -24.4226 dB, respectively. The inclusion of the rectangular slots in the CSRR based slot antenna with stairecase structure improved the performance with respect to return loss.
In this paper a microstrip-fed planar monopole antenna has been proposed for wideband applications. Three monopole antenna have been designed and analyzed for improving antenna performance parameters. Antenna performance parameter such as return loss, bandwidth, voltage standing wave ratio (VSWR), gain, directivity and radiation efficiency of proposed antenna have been analyzed and compared with each other. As a simulation tool CST Microwave Studio 2012 has been used. Proposed antenna showed the resonance at 6.46 GHz and 10.49 GHz. At these points return loss founded as -19.77 dB and -13.45 dB respectively. Obtained bandwidth of these points at -10dB are 20.14% and 5.79%. Later comparison of performance parameters have been done.
Wireless Personal Communications, 2017
Three compact monopole ultrawideband (UWB) antennas with half-wavelength symmetric circular slots etched on the radiating patch and operating in the UWB spectrum are proposed. Parametric studies followed by experimental results of the return loss coefficient S 11 versus the circular slot length prove dual ensured functions. In fact, a switching from an impedance mismatch to an impedance matching appears when we replace a semicircular etched slot by a small circular slot while maintaining its inner radius constant. Simulated and measured reflection coefficient S 11 of a fabricated prototype with a stack of two small circular slots concord well and prove an impedance bandwidth enhancement that covers 3.9-14 GHz frequencies band (S 11 \-10 dB) compared to the impedance bandwidth 3.55-4.77 and 7.65-11.08 GHz (S 11 \-10 dB) of the baseline antenna without slots. In addition, measured radiation patterns in the H-plane of the monopole with two etched symmetric slots, are stably omnidirectional at 5.8 and 7.5 GHz. It is noted that due to some strong transverse currents around the small circular symmetric embedded slots, the cross-polarization in the same plane and at the same frequencies are not as low as single monopole. We noticed that there appears to be a close correspondence between the minimum of E A and the maximum of E h electrical components. That is to say, the signals of the co-polarizations are irrelevant to those of the cross-polarizations. Due to
Conical Shaped Monopole Antenna for Multiband Wireless Applications
2015
In this paper we propose a conical shaped slotted monopole antenna for multiband application. The antenna is small sized, lightweight, and low cost offers multiband operation which is useful for S-band, C-band, and Xband applications. This proposed geometry size is 20 × 20 mm with 1.6mm thickness. Radiating patch is printed on cost effective 1.6mm thick FR4 dielectric material which is fed by 4mm long microstrip line. IE3D is efficiently utilized for designing and analyzing this antenna. Fabricated proposed prototype offers four bands which are 3.35 to 3.75GHz, 5.1 to 5.25GHz, 6.85 to 7.1GHz, and 9.55 to 9.7GHz. These find applications in S, C, and X-bands. Measured results fairly agree with simulated values.
Compact triband slotted printed monopole antenna for WLAN and WiMAX applications
International Journal of RF and Microwave Computer-Aided Engineering, 2019
This work presents a triband antenna, which is compact, low profile, and covers the bandwidth requirements for WLAN and WiMAX applications. The proposed design is a modified and miniaturized printed monopole antenna. It consists of beveling rectangular patch, a Pi-shape slot element, and an inverted-L slot element to achieve resonance in three bands. The physical size of the antenna is 27.5 × 20 mm 2 while the electrical size is 0.26 λ 0 × 0.23 λ 0 at the lower operating frequency which is very compact as compared to other triband designs. It works in three bands, that is, 2.37 to 2.52 GHz, 3.35 to 3.90 GHz, and 4.97 to 7.85 GHz with |S 11 | < − 10 dB within these operating bands. The prototype of the proposed miniaturized antenna has been fabricated and the measured results are provided for validation. Antenna performance is studied in terms of input match, gain, radiation efficiency, surface current distributions, and radiation pattern. The antenna shows a nearly omnidirectional radiation pattern with peak efficiency of 90% and acceptable gain of 4 dBi over the three operating bands of WLAN and WiMAX. The prototype of the antenna is fabricated, and simulated results have been verified through measurements.
PENTAGON AND CIRCULAR RING SLOT LOADED RECTANGULAR MICROSTRIP MONOPOLE
This paper presents the design and development of pentagon and circular ring slot loaded rectangular microstip monopole antenna for quad band operation. The antenna operates for four bands of frequencies in the range of 4 to 16 GHz. If complimentary circular slot is loaded inside pentagon the antenna operates for triple bands of frequencies resulting the primary resonating mode unaffected with enhanced operating bands. This antenna also gives the maximum gain of 9.98 dB. In both cases the antenna shows ominidirectional radiation characteristics. The proposed antennas may find application in microwave communication systems. , © IAEME