Design of slotted ground hexagonal microstrip patch antenna and gain improve-ment with fss screen (original) (raw)
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Design of Hexagonal Microstrip Patch Antenna for Bandwidth Enhancement and Miniturization
International Journal of Technical Research & Science
This paper presents the design and performance of inset feed hexagonal patch antenna for miniaturization, bandwidth enhancement and circular polarization. Along with the novel geometry, a 2X1 array and 2X2 array of hexagonal patch has also been implemented. The prototype of the antenna has been designed and simulated on ADS (Advanced Design System). By implementing the hexagonal geometry, impedance bandwidth has improved by 62.8% and the gain has been enhanced by 14.2%.The designed antenna resonates at a frequency of 5Ghz.Nowadays,this frequency band is being used extensively in various applications which primarily include Wi-Fi and WLAN, which earlier was used in 2.4 GHz frequency band. A comparative study of hexagonal geometry with rectangular geometry arrays has been presented in terms of impedance bandwidth, gain and polarizations. The designed hexagonal array antennas have been fabricated by CNC Engraver while the rectangular geometry arrays by photo-lithographic method. The design is fabricated and tested on Vector Network Analyzer (VNA).It is found that the stimulated results are in close proximity with the fabricated ones. The antenna design can be used in modern day mobile communication due to its optimized area coverage along with enhanced bandwidth.
Wide Band Microstrip Patch Antenna with Enhanced Gain using FSS Structure
Journal of Microwaves, Optoelectronics and Electromagnetic Applications
This paper suggests a slotted ground 'S'-shaped low profile planar microstrip patch antenna for wideband and high gain operation. The suggested antenna has physical dimensions of × ×. having a fractional bandwidth of 111% having the operating impedance bandwidth 22.55GHz (9.12 GHz to 31.67 GHz). At 19 GHz, maximum gain of 3.9 dBi is attained. An equivalent circuit model corresponding to suggested antenna is designed by ADS software and assessed with the simulated and measured antenna results. Frequency Selective Surface (FSS) of single layer has been placed at optimum position at a distance of 15 mm below the antenna for further improvement of the overall gain of the suggested antenna. Combination of suggested antenna and × FSS configuration increases peak gain to 9.4 dBi maintaining the same antenna bandwidth. The FSS unit cell of dimension. ×. ×. is used. Design of the antenna is done using commercially available electromagnetic simulator (CST Microwave Studio), and the simulated results are verified by suitable antenna measurement technique using standard microwave test bench. Given FSS integrated antenna has an overall physical volume of × × which makes it ideally suited for highgain long-range applications.
Progress In Electromagnetics Research C, 2019
This paper proposes low profile, high gain and wideband circularly polarized (CP) microstrip antennas (MSA), using gap coupled parasitic patches (PPs) on superstrate layer. Printed and suspended probe fed, CP MSAs are designed on a 1.59 mm thick FR4 substrate, and an array of closely spaced hexagonal PPs are printed on the bottom side of the 1.59 mm thick FR4 superstrate and placed at a height about λ 0 /8 above the ground plane, where λ 0 is the free space wavelength, corresponding to the central frequency of the operating frequency band. The gap coupled hexagonal PPs are not only used to enhance the axial ratio bandwidth (AR BW) and gain of the antenna, but also used to reduce impedance and gain variation of the antenna over the operating frequency band. 'Ant9' is a suspended MSA with 7 hexagonal PPs. A prototype 'Ant9' is fabricated and tested, which provides a peak gain of 9 dBi, S 11 < −10 dB, gain variation < 1 dB, and AR < 3 dB over 4.9 to 6.45 GHz frequency band. ARBW of 27.3% is achieved. The proposed 'Ant9' covers three frequency bands viz., 5.15 to 5.35 GHz, WLAN band, 5.725 to 5.875 GHz, ISM band, and 5.9 to 6.4 GHz, Satellite C band. The space fed antenna configuration reduces the cross polar radiation level (CPL) and increases the efficiency of the antenna. The measured results agree with the simulation ones. The overall size of 'Ant9' is 0.96λ 0 × 0.96λ 0 × 0.136λ 0 .
Bandwidth enhancement of microstrip patch antenna using ‘U’ slot with modified ground plane
2015
In this paper, we present a novel approach for improving the bandwidth of a microstrip patch antenna using Jerusalem crossshaped frequency selective surfaces (JC-FSSs) as an artificial magnetic ground plane. The invasive weed optimization (IWO) algorithm is employed to derive optimal dimensions of the patch antenna and JC-FSS element in order for the whole structure to work at 5.8 GHz with consideration of gain. For the most efficient design, the antenna and FSS ground plane are optimized together, rather than as separate components. Simulation results demonstrate that this optimum configuration (the microstrip patch antenna over the artificial magnetic ground plane) have a broad bandwidth of about 10.44%. This wide bandwidth is obtained while the thickness of the whole structure is limited to 0.1λ. Further more desirable radiation characteristics have been successfully realized for this structure. The radiation efficiency of the AMC antenna configuration was found to be greater than 85% over the entire bandwidth. In general by introducing this novel Jerusalem cross artificial magnetic conductor (JC-AMC) in lieu of the conventional perfect electric conductor (PEC) ground plane, the bandwidth enhancement of about 67% and a thinner and lighter weight design has been obtained. Sample antenna and EBG layer are also fabricated and tested, to verify the designs. It is shown that the simulation data in general agree with the measurement results for the patch antennas implemented with FSS ground plane.
Trends in Sciences
This paper presents a broadband-multiband circularly polarized hexagonal patch antenna. The structure is fed by a unique coplanar hexagonal gap coupled proximity coupled feed with parasitic elements. The antenna is designed using a 14.2×14.2 mm2 FR4 substrate. By introducing hexagonal slot and I slot in the patch, the structure behaves as a multiband antenna with resonating frequencies at 2.76, 5.66 and 11.52 GHz. with 0.2837, 0.4525 and 0.3356 GHz respective bandwidths. By inserting I-shaped slots and rectangular slots in patch and also, I-shaped slots in the ground, the circular polarization is achieved in the L band and C band. The proposed structure was fabricated and tested. The simulated results of the magnitude of S11, radiation patterns and realized gains show good agreement with tested results. HIGHLIGHTS Proposed antenna is single layer broadband multiband circularly polarized hexagonal patch antenna A unique feed technique coplanar hexagonal gap coupled proximity coupled ...
Dual Frequency Hexagonal Microstrip Patch Antenna
The study of Microstrip patch antennas have made great progress in recent years. Compared with conventional antennas, Microstrip patch antennas have more advantages and better prospects. They are lighter in weight, low volume, low cost, low profile, smaller in dimension and ease of fabrication and conformity. Moreover, the Microstrip patch antennas can provide dual and circular polarizations, dual-frequency operation, frequency agility, broad band-width, feed line flexibility, and beam scanning omnidirectional patterning. In this paper we discuss the Microstrip antenna, types of Microstrip antenna, feeding techniques and application of Microstrip patch antenna with their advantage and disadvantages and the benefits of using slots.
Effect of FSS structure on planar patch antenna
2015 International Conference on Energy Economics and Environment (ICEEE), 2015
A simple microstrip patch antenna was first used to study and its resonant frequency and bandwidth were observed. Based on the observations a Frequency Selective Surface (FSS) is proposed to improve the bandwidth, antenna gain and return losses of a patch antenna. Fabricated results of the return losses, radiation pattern and antenna gain of this patch antenna are also presented. Through the Fabricated results it has been proven that the microstrip antenna implanted with an FSS structure containing fractal cross elements has been converted into an antenna with good performance along with sufficient bandwidth and higher gain.
A compact high gain microstrip antenna for wireless applications
AEU - International Journal of Electronics and Communications, 2013
In this article, we describe a novel type of defective ground surface (DGS) microstrip antenna that achieves higher gain, multi resonant frequency with compact size. The proposed antenna consists of a hexagonal shaped patch with small volume. Six triangular slots have been cut on the ground plane, just below the six corners of the hexagonal radiating patch. Antenna is circularly polarized one and it has the measured peak gain of 7.2 dBi. The antenna shows multi frequency behavior and more than 57% compactness compare to the conventional hexagonal patch antenna. The simulated results are confirmed experimentally. The proposed antenna is simple in structure compared with the regular stacked or coplanar parasitic patch antennas. It is highly suitable for wireless communications.
Coaxially Fed Hexagonal Patch Antenna for C- and X-Band Applications with Reduced-Ground Plane
ECTI Transactions on Electrical Engineering, Electronics, and Communications, 2019
The consequence of reduced ground plane in a coaxially-fed hexagonal antenna, on impedance and radiation is analyzed and presented here. Measured and simulated impedance results for a designed antenna are compared with the equivalent circuit model in this paper. The reduction in ground plane excited frequencies in upper C-band and lower X-band. The designed hexagonal antenna uses a substrate with a dimension of 32×33.5 mm2 along with a reduced ground plane of area, 10.44×24.44 mm2. The proposed antenna has a 285 MHz and 380 MHz impedance bandwidth in C-band and X-band respectively. The designed antenna with reduced ground plane works well for C-band and X-band applications.