Design Studies of Ultra-Wideband Microstrip Antennas with a Small Capacitive Feed (original) (raw)
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Design studies of ultra-wideband microstrip antenna for ultra-wideband communication
The design of an ultra-wideband microstrip patch antenna with a small coplanar capacitive feed strip is presented. The proposed rectangular patch antenna provides an impedance bandwidth of nearly 50%, and has stable radiation patterns for almost all frequencies in the operational band. Results presented here show that such wide bandwidths are also possible for triangular and semiellipse geometries with a similar feed arrangement. The proposed feed is a very small strip placed very close to the radiator on a substrate above the ground plane. Shape of the feed strip can also be different, so long as the area is not changed. Experimental results agree with the simulated results. Effects of key design parameters such as the air gap between the substrate and the ground plane, the distance between radiator patch and feed strip, and the dimensions of the feed strip on the input characteristics of the antenna have been investigated and discussed. As demonstrated here, the proposed antenna can be redesigned for any frequency in the L-, S-, C-, or X-band. A design criterion for the air gap has been empirically obtained to enable maximum antenna bandwidth for all these operational frequencies.
A Compact Microstrip Antenna for Ultra Wideband Applications
European Journal of Scientific Research
In this study, a simple and compact ultra-wideband (UWB) patch antenna with rectangular slot is presented. The fabricated antenna consists of a rectangular patch tapered from a microstrip feeding structure and a truncated ground plane. The proposed antenna is etched onto a FR4 printed circuit board (PCB) with an overall size of 28 mm × 29 mm × 1.6 mm. Simulated and experimental results are compared and are shown to be in good agreement. Experimental results indicate that the antenna achieved an UWB impedance bandwidth (S 11 < -10 dB) ranges from 3.8 to 12 GHz. The small antenna exhibits a good voltage standing wave ratio (VSWR) performance and its E-and H-plane radiation patterns are stable over the UWB frequency range. The simulated result shows that the designed antenna can achieve a gain between 1.5 and 4.5 dBi against frequency. Besides, the group delay is less than 0.4 ns over the operating frequency band. These characteristics make the designed antenna suitable for various UWB applications.
A Capacitive Fed Microstrip Patch Antenna with Air Gap for Wideband Applications (RESEARCH NOTE)
International Journal of Engineering, 2014
In this paper, a microstrip antenna on a suspended substrate with capacitive feed is presented. capacitive feed is created by a slot within the rectangular patch around the feed point. The proposed antenna exhibits a much higher impedance bandwidth of about 47% (S11 < −10 dB). Effects of key design parameters such as the air gap between the substrate and the ground plane, the gap width between radiator patch and feed point, and the location of the feed point on the input characteristics of the antenna have been investigated and discussed. A prototype of the antenna is also fabricated and tested to verify the design. Measured characteristics of the antenna are in good agreement with the simulated results.
In the modern days the development in communication systems engineering requires the development of low profile antennas that are capable of maintaining high performance over a wide spectrum of frequencies. In this review, we have designed an elementary Microstrip patch Antenna for ultra-wideband application. This technological trend has focused much effort on the basic concepts, characteristics and design of a Microstrip patch antenna. This paper explains the pattern of designs of the Microstrip patch antenna along with detailed study. A thorough analysis and observations of the problem begins with the application of the equivalence principle that introduces the unknown electric and magnetic surface current densities on the dielectric surface. Here in this technical review, our main goal is to design an elementary Microstrip antenna, which will work in the ultra-wide band range and also it should work in the desired operating frequency. Ansoft High Frequency Structured Simulations (HFSS) software is used for the elementary design of a rectangular patch Microstrip antenna and also some of the basic calculations has been done by using MATLAB. This review paper also comprises of basic parameters, types of antenna, working, fundamental concepts and characteristics as well as feeding techniques and simulation, results of Microstrip patch antenna.
A compact monopole micro strip rectangular patch antenna having truncated ground plane(TGP) with notches is presented in this paper. Ultra-wide band (UWB) patch antenna is feed by micro strip line feed. Parametric analysis have been conducted by designing the pair of notches on both patch and ground plane, analysis by varying the distance between rectangular radiating patch and truncated ground plane, at last by obtaining micro strip feedline position. Optimum results are observed when gap between the radiating patch and TGP is 1mm and for centered feeding of microstrip feedline. The obtained reflection coefficient is less than -10dB for a frequency range of 3.1GHz to 12 GHz. The proposed antenna has been designed on a FR4 substrate with dielectric constant єr = 4.4, loss tangent (tan δ) = 0.02. The radiation pattern is directional in E-plane and nearly omnidirectional in H-plane. Efficiency decreases at the higher frequency edge due to the lossy substrate and it is upto 70%. The UWB antenna is simulated using CAD FEKO 6.2 suit electromagnetic simulator using MoM (Method of Moment).
Designing a Microstrip Patch Antenna in Part of Ultra-Wideband Applications
2020
In this work, a simulated study was carried out for designing a novel spiral rectangular patch of microstrip antenna that is used in ultra-wideband applications by using a high frequency structure simulator software (HFSS). A substrate with dielectric constant of 4.4 and height 2.10 mm (commercial substrate height available is about 0.8-1.575 mm) has been used for the design of the proposed antenna. The design basis for enhancing bandwidth in the frequency range 6.63 10.93 GHz is based on increasing the edge areas that positively affect the antenna's efficiency. This design makes the designed antenna cost less by reducing the area of the patch. It has been noticed that the bandwidth of the antenna under this study is increasing to 4.30 GHz or 61% compared with 3.6% for the standard rectangular microstrip antenna with the same dimensions of the proposed antenna. The antenna also maintains the voltage standing wave ratio of 1.09 at resonant frequency 7.07 GHz, return loss -27.07 d...
Design of a compact ultra wide band microstrip patch antenna
Fifth International Conference on Computing, Communications and Networking Technologies (ICCCNT), 2014
This paper deals with a new compact, ultrawideband (UWB) antenna using a coaxial probe feed technique by introducing some slots in the square patch of 20mm × 20 mm. The proposed antenna is designed to operate from 1.82 to 3.72 GHz with the center frequency at 2.20 GHz. Size reduction of 83% is also presented in this paper. The antenna has nearly good Omni-directional radiation pattern and peak gain of 3.65 dBi. The group delay profile of the proposed antenna lies within 1ns. The areas of applications are medical imaging, wireless communication, and vehicular radar. Theoretical investigations have been done by An soft designer software.
Design of a Novel Shaped Ultra Wideband Co-Axial Feed Microstrip Patch Antenna
2014 Fourth International Conference on Advanced Computing & Communication Technologies, 2014
In this paper the antenna designing is shown for a compact nature and co-axial fed for Ultra Wide Band (UWB) applications. The antenna has been designed by introducing some slots on the radiating patch and some slots on the ground plane. FR4 substrate has been used here with a dielectric constant of 3.4. The ultra wide band of the antenna ranges from 2.70 GHz to 6.40 GHz (Bandwidth of 3.70 GHz). The minimum return loss observed here is -37.05 dB in the resonating frequency of 3.30 GHz. So the percentage bandwidth is 112 %. The maximum gain achieved here is 4.0 dBi at 5.80 GHz.
A Printed Microstrip Patch Antenna Design for Ultra Wideband Applications
2014
In this paper a printed microstrip patch antenna for ultra wideband application (UWB) is proposed. The proposed antenna consists of a beveled rectangular patch and partial ground plane, which is etched onto Rogers TMM6 (tm) substrate, with an overall dimension of 31mm × 32mm × 1.27mm. Simulated results indicate that the antenna achieved an UWB impedance bandwidth (S11<-10dB) ranges from 3.0GHz to11.58GHz. The proposed antenna exhibits a good voltage standing wave ratio (VSWR) performance and its E- and H-plane radiation patterns are stable over the UWB frequency range. The simulation was done using Ansoft High Frequency Structure Simulator (HFSS) software.
Design of a Ultra-Wideband Rectangular Patch Microstrip Antenna with Improved Bandwidth
International Journal of Recent Engineering Science, 2021
In wireless communication systems, patch antennas are most commonly used. A primary disadvantage of the patch antennas is their restricted bandwidth (<5%). This paper presents the design of a rectangular patch microstrip antenna for UWB applications using the partial ground plane technique with a single rectangular slot on the upper edge of the partial ground plane and right-angle triangular slots on the lower corners of the patch, which has been designed to overcome this impediment. The suggested design has an impedance