Multiport Power Combining Patch Antenna With Stable Reflection Coefficient and Radiation Pattern in Six Polarization States

2019 ◽  
Vol 67 (2) ◽  
pp. 719-729 ◽  
Author(s):  
Wen Duan ◽  
Xiu Yin Zhang ◽  
Shaowei Liao ◽  
Kai Xu Wang ◽  
Quan Xue
Keyword(s):  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Power Combining ◽  
Polarization States

scholarly journals An Octagonal Ring-shaped Parasitic Resonator Based Compact Ultrawideband Antenna for Microwave Imaging Applications

Sensors ◽  
2020 ◽  
Vol 20 (5) ◽  
pp. 1354 ◽  
Author(s):  
Amran Hossain ◽  
Mohammad Tariqul Islam ◽  
Ali F. Almutairi ◽  
Mandeep Singh Jit Singh ◽  
Kamarulzaman Mat ◽  
...  
Keyword(s):  
Experimental Data ◽  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Ground Plane ◽  
Microwave Imaging ◽  
Average Efficiency ◽  
Antenna Performance ◽  
Directional Radiation ◽  
Radiation Directivity

An Ultrawideband (UWB) octagonal ring-shaped parasitic resonator-based patch antenna for microwave imaging applications is presented in this study, which is constructed with a diamond-shaped radiating patch, three octagonal, rectangular slotted ring-shaped parasitic resonator elements, and partial slotting ground plane. The main goals of uses of parasitic ring-shaped elements are improving antenna performance. In the prototype, various kinds of slots on the ground plane were investigated, and especially rectangular slots and irregular zigzag slots are applied to enhance bandwidth, gain, efficiency, and radiation directivity. The optimized size of the antenna is 29 × 24 × 1.5 mm3 by using the FR-4 substrate. The overall results illustrate that the antenna has a bandwidth of 8.7 GHz (2.80–11.50 GHz) for the reflection coefficient S11 < −10 dB with directional radiation pattern. The maximum gain of the proposed prototype is more than 5.7 dBi, and the average efficiency over the radiating bandwidth is 75%. Different design modifications are performed to attain the most favorable outcome of the proposed antenna. However, the prototype of the proposed antenna is designed and simulated in the 3D simulator CST Microwave Studio 2018 and then effectively fabricated and measured. The investigation throughout the study of the numerical as well as experimental data explicit that the proposed antenna is appropriate for the Ultrawideband-based microwave-imaging fields.

scholarly journals Design of Multiband E-Shaped Patch Antenna with Hexagonal Slot for WLAN Applications

2019 ◽  
Vol 12 (1) ◽  
pp. 37-41
Author(s):  
A. Pramod Kumar
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Parametric Study ◽  
Patch Antenna ◽  
Return Loss ◽  
Wireless Systems ◽  
Antenna Design ◽  
Ism Band ◽  
Antenna Performance

Abstract The objective of E-shaped patch antenna with hexagonal slot is to operate in the ISM band for different kind of applications, such as WLAN, GPS, and various modern wireless systems. The posit antenna is designed using FR4 substrate having a dielectric constant of 4.4 with a thickness of 1.6 mm. Probe feed technique is used for this antenna design. A parametric study was included to determine the effect of design approaches and the antenna performance. The realization of the designed antenna was analyzed in term of boost (gain), return loss, and radiation pattern. The design was upsurged to confirm the best achievable result. This antenna resonates at three different frequencies at 1.6 GHz, 3.24 GHz, and 5.6 GHz with a reflection coefficient less than -10 dB and VSWR<2.

scholarly journals Effects of Different Substrates on Rectangular Microstrip Patch Antenna for X-band

2018 ◽  
Vol 7 (2) ◽  
pp. 91-95
Author(s):  
Imran Khan ◽  
D. Geetha Devanagavi ◽  
K. R. Sudhindra ◽  
S. Prathibha ◽  
C. Shruthi . ◽  
...  
Keyword(s):  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Radiation Efficiency ◽  
Radiation Patterns ◽  
Microstrip Patch ◽  
X Band ◽  
Rectangular Microstrip Patch Antenna

In this paper, the performance of Microstrip Patch Antenna (MSPA) is analyzed by changing the substrate materials. MSPA is designed to operate with the fixed dimensions of ????????×????????×????.???????????????? for three substrate materials. A comparison has been done in terms of reflection coefficient (S11), gain, efficiency (η), radiation pattern and cost. The simulated results show very good performance with TLC substrate as compared to FR4 and RT Duroid by showing good radiation efficiency for all the three bands viz 7.0, 9.6 and 10.8 GHz with the efficiency of 99%, 99% and 96% respectively, stable radiation patterns, gain of 1.32, 1.81 and 2.0 dB. FR-4 and RT Duroid produces two bands each of 8.4/ 9.6 GHz and 11.1/12.0 GHz respectively which shows a gain of 1.29/1.36 dB for FR4 and 1.04/7.95 dB for RT Duroid along with efficiency of 68%/ 60% and 96%/96% respectively with acceptable bandwidth. The Antenna is simulated using HFSS simulator solution software.

scholarly journals A dual-frequency patch antenna with monopolar radiation pattern

2010 ◽  
Author(s):  
Francisco Javier Herraiz-Martínez ◽  
Eduardo Ugarte-Muñoz ◽  
Vicente González-Posadas ◽  
Daniel Segovia-Vargas
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Dual Frequency

scholarly journals Microstrip patch antenna with metamaterial using superstrate technique for wireless communication

2021 ◽  
Vol 10 (4) ◽  
pp. 2055-2061
Author(s):  
Rasha Mahdi Salih ◽  
Ali Khalid Jassim
Keyword(s):  
Wireless Communications ◽  
Reflection Coefficient ◽  
Wireless Communication ◽  
Patch Antenna ◽  
Relative Permittivity ◽  
Microstrip Antenna ◽  
Microstrip Patch Antenna ◽  
Antenna Gain ◽  
Microstrip Patch ◽  
Antenna Performance

This work builds a metamaterial (MTM) superstrate loaded on a patch of microstrip antenna for wireless communications. The MTM superstrate is made up of four G-shaped resonators on FR-4 substrate with a relative permittivity of 4.4 and has a total area of (8×16) mm2, and is higher than the patch. The MTM superstrate increases antenna gain while also raising the input reflection coefficient. When it is 9 mm above the patch, the gain increased from 3.28 dB to 6.02 dB, and when it is 7 mm above the patch, the input reflection coefficient was enhanced from -31.217 dB to -45.8 dB. When the MTM superstrate loaded antenna was compared to the traditional unloaded antenna, it was discovered that metamaterials have a lot of potential for improving antenna performance.

A Hammer Type Textile Antenna With Partial Circle Ground for Wide-Band Application

2020 ◽  
pp. 15-24
Author(s):  
Anurag Saxena ◽  
Bharat Bhushan Khare
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Patch Antenna ◽  
Wide Band ◽  
Simulation Tool ◽  
Textile Antenna ◽  
Partial Circle ◽  
Maximum Directivity

In this chapter, a partial circle ground textile patch antenna for wideband applications with better bandwidth is presented. The simulated antenna is proposed on textile jeans substrate having dielectric constant of 1.7. The radius of textile jeans substrate antenna is 15 mm. The overall simulation of partial circle grounded shaped antenna has been done using CST simulation tool. The simulated antenna resonates at frequency 9.285 GHz with the reflection coefficient of -28 dB. It covers a bandwidth from 7.008 GHz to 9.64 GHz. It has maximum directivity of 4.540 dBi.

In Body Communication

2018 ◽  
Vol 9 (1) ◽  
pp. 64-75 ◽  
Author(s):  
Raghvendra Singh ◽  
Dambarudhar Seth ◽  
Sanyog Rawat ◽  
Kanad Ray
Keyword(s):  
Reflection Coefficient ◽  
Electromagnetic Radiation ◽  
Performance Improvement ◽  
Human Tissue ◽  
Patch Antenna ◽  
Patch Antennas ◽  
Estimation Of Parameters ◽  
Mics Band ◽  
Tissue Models ◽  
Directive Gain

This article makes an effort to assess the performance of a stacked meandered patch antenna in proximity of multiple homogeneous human tissue models. Nowadays, many smart wireless gadgets are being used around human vicinity, hence the performance investigation of these wireless gadgets is major concern. This article discloses the performance of meandered patch antenna for in-body communication in the MICS band. The human tissue is considerably effected by the exposure of electromagnetic radiation. Performance improvement of patch antennas used in wireless gadgets is the key solution of the problem. This article presents the estimation of parameters of stacked meandered patch antennas; reflection coefficient, radiation pattern, directive gain and VSWR in proximity of multiple homogeneous human tissue models.

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