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 The Effect of a Single and Combined Slot Generated At the Upper and Lower Part of the Rectangular Patch Antenna Performances

2016 ◽  
Vol 4 (1) ◽  
Author(s):  
Adnan Affandi ◽  
Navin Kasim ◽  
Talal Hamdan Hamad Althebiani
Keyword(s):  
System Design ◽  
Radiation Pattern ◽  
Patch Antenna ◽  
Ground Plane ◽  
Antenna Feed ◽  
Feed Line ◽  
Rectangular Patch ◽  
Antenna Performance ◽  
Advanced System

<div><p><em>The paper investigates the effect of the slot made on the radiating plane (top) and ground plane individually and their effect when made on both the surfaces on the antenna performance. The paper further investigates effect of the slot on gain, frequency and radiation pattern made at different angles more specifically at angles of </em><em>0°,45° and 90° to the antenna feed line.</em></p><p><em>The antenna has been designed using advanced system design (ADS).</em></p></div>

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 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.

scholarly journals Ultralow Profile, Low Passive Intermodulation, and Super-Wideband Ceiling Mount Antennas for Cellular and Public Safety Distributed Antenna Systems

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2456
Author(s):  
Kok Jiunn Ng ◽  
Mohammad Tariqul Islam ◽  
Adam M. Alevy ◽  
Mohd. Fais Mansor
Keyword(s):  
Radiation Pattern ◽  
Public Safety ◽  
Ground Plane ◽  
Antenna System ◽  
Band Ratio ◽  
Antenna Performance ◽  
Distributed Antenna ◽  
Small Disc ◽  
Passive Intermodulation ◽  
Better Than

This paper presents an ultralow profile, low passive intermodulation (PIM), and super-wideband in-building ceiling mount antenna that covers both the cellular and public safety ultra high frequency (UHF) band for distributed antenna system (DAS) applications. The proposed antenna design utilizes a modified 2-D planar discone design concept that is miniaturized to fit into a small disc-shaped radome. The 2-D planar discone has an elliptical-shaped disc monopole and a bell-shaped ground plane, a stub at the shorting path, with asymmetrical structure and an additional proximity coupling patch to maximize the available electrical path to support the 350 MHz band range. The proposed design maximizes the radome area with a reduction of about 62% compared to similar concept type antennas. Besides, the proposed design exhibits an improved radiation pattern with null reduction compared to a typical dipole/monopole when lies at the horizontal plane. A prototype was manufactured to demonstrate the antenna performance. The VSWR and radiation pattern results agreed with the simulated results. The proposed antenna achieves a band ratio of 28.57:1 while covering a frequency range of 350–10000 MHz. The measured passive intermodulation levels are better than −150 dBc (2 × 20 Watts) for 350, 700 and 1920 MHz bands.

scholarly journals Performance Comparison of Swastika and Rectangular Shaped Microstrip Patch Antenna

2018 ◽  
Vol 1 (1) ◽  
pp. 11-14
Author(s):  
Suroj Burlakoti ◽  
Prakash Rai
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Return Loss ◽  
Ground Plane ◽  
Performance Comparison ◽  
Microstrip Patch Antenna ◽  
Simulation Software ◽  
Patch Antennas ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch

In this paper, Microstrip patch antennas with rectangular and swastika shape of patch are designed and its performance parameters are compared with each other. Rectangular and Swastika shaped patch are considered in this paper with common rectangular ground plane. The antenna is simulated at 2.4 GHz using HFSS simulation software. This work mainly includes modification of antenna patch to improve the antenna parameters. The parameters of antenna such as Return loss, VSWR Bandwidth and radiation pattern are compared using simulation. The performance of Swastika shaped antenna was found to be better than rectangular shaped microstrip patch antenna with improved Return Loss, VSWR, Bandwidth and Radiation Pattern.

scholarly journals EBG Based Microstrip Patch Antenna for Brain Tumor Detection via Scattering Parameters in Microwave Imaging System

2018 ◽  
Vol 2018 ◽  
pp. 1-12 ◽  
Author(s):  
Reefat Inum ◽  
Md. Masud Rana ◽  
Kamrun Nahar Shushama ◽  
Md. Anwarul Quader
Keyword(s):  
Human Brain ◽  
Patch Antenna ◽  
Imaging System ◽  
Ground Plane ◽  
Human Head ◽  
Microstrip Patch Antenna ◽  
Microwave Imaging ◽  
Head Model ◽  
Imaging Algorithm ◽  
Microstrip Patch

A microwave brain imaging system model is envisaged to detect and visualize tumor inside the human brain. A compact and efficient microstrip patch antenna is used in the imaging technique to transmit equivalent signal and receive backscattering signal from the stratified human head model. Electromagnetic band gap (EBG) structure is incorporated on the antenna ground plane to enhance the performance. Rectangular and circular EBG structures are proposed to investigate the antenna performance. Incorporation of circular EBG on the antenna ground plane provides an improvement of 22.77% in return loss, 5.84% in impedance bandwidth, and 16.53% in antenna gain with respect to the patch antenna with rectangular EBG. The simulation results obtained from CST are compared to those obtained from HFSS to validate the design. Specific absorption rate (SAR) of the modeled head tissue for the proposed antenna is determined. Different SAR values are compared with the established standard SAR limit to provide a safety regulation of the imaging system. A monostatic radar-based confocal microwave imaging algorithm is applied to generate the image of tumor inside a six-layer human head phantom model. S-parameter signals obtained from circular EBG loaded patch antenna in different scanning modes are utilized in the imaging algorithm to effectively produce a high-resolution image which reliably indicates the presence of tumor inside human brain.

scholarly journals Ultra Wide Band Antenna with Defected Ground Plane and Microstrip Line Fed for Wi-Fi/Wi-Max/DCS/5G/Satellite Communications

2020 ◽  
Author(s):  
Ashish Singh ◽  
Krishnananda Shet ◽  
Durga Prasad
Keyword(s):  
Radiation Pattern ◽  
Satellite Communication ◽  
Ground Plane ◽  
Wide Band ◽  
Satellite Communications ◽  
Ultra Wide Band ◽  
Wireless Applications ◽  
Directional Radiation ◽  
Ring Antenna ◽  
Theoretical Results

In this chapter, ultra wide band angular ring antenna has been proposed for wireless applications. It has been observed that antenna resonate from 2.9 to 13.1 GHz which has 10.2 GHz bandwidth. Further, it is observed that antenna has nearly omni-directional radiation pattern for E and H-plane at 3.5, 5.8, and 8.5 GHz. The theoretical analysis of the proposed has been done using circuit theory analysis. It was also found using simulation that antenna has good input and output response of 0.2 ns. Proposed antenna measured, simulated, and theoretical results matches for antenna characteristics, i.e., reflection coefficient and radiation pattern. Bandwidth of antenna lies between 2.9 and 13.1 GHz, so this antenna is suitable for Wi-Fi, Wi-Max, digital communication system (DCS), satellite communication, and 5G applications.

scholarly journals A Modified Rectangular Mid-band Microstrip Slot Antenna for WLAN, WiFi and 5G Applications

2021 ◽  
Vol 23 (1) ◽  
Author(s):  
Ajay Thatere ◽  
◽  
Sachin Khade ◽  
Vipul Lande S ◽  
◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Reflection Coefficient ◽  
Radiation Pattern ◽  
Current Distribution ◽  
Ground Plane ◽  
Surface Current ◽  
Slot Antenna ◽  
Current Gain ◽  
Wide Bandwidth ◽  
Left And Right

A modified rectangular Microstrip slot antenna for numerous applications like WLAN, Wi-Fi 5, satellite telecommunication and 5G application is portrayed. The proposed antenna has dimension of 25×30×1.6 mm3. The structure consists of partial ground and DGS. The proposed design is embedded on FR4 lossy substrate having dielectric constant of 4.3 and thickness of 1.6 mm. Two similar inverted L shape CLLR are introduced at left and right edge of the ground plane to improve current distribution and to achieve wide bandwidth. The results like reflection coefficient, surface current, gain, directivity, VSWR, impedance and radiation pattern are found up to the mark.

A Novel-Shaped Reduced Size FSS-Based Broadband High Gain Microstrip Patch Antenna for WiMAX/WLAN/ISM/X-Band Applications

2021 ◽  
pp. 2150290
Author(s):  
Kalyan Mondal
Keyword(s):  
Patch Antenna ◽  
Microstrip Antenna ◽  
Ground Plane ◽  
High Gain ◽  
Microstrip Patch Antenna ◽  
Impedance Bandwidth ◽  
Antenna Structure ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Peak Gain

In this work, a broadband high gain frequency selective surface (FSS)-based microstrip patch antenna is proposed. The dimensions of the microstrip antenna and proposed FSS are [Formula: see text] and [Formula: see text]. A broadband high gain reference antenna has been selected to improve antenna performance. The reference antenna offers 1.2[Formula: see text]GHz bandwidth with 6.03[Formula: see text]dBi peak gain. Some modifications have been done on the patch and ground plane to enhance the bandwidth and gain. The impedance bandwidth of 7.70[Formula: see text]GHz (3.42–11.12[Formula: see text]GHz) with 4.9 dBi peak gain is achieved by the microstrip antenna without FSS. The antenna performance is improved by using FSS beneath the antenna structure. The maximum impedance bandwidth of 7.70[Formula: see text]GHz (3.32–11.02[Formula: see text]GHz) and peak gain of 8.6[Formula: see text]dBi are achieved by the proposed antenna with FSS. Maximum co- and cross-polarization differences are 21[Formula: see text]dB. The simulation and measurement have been done using Ansoft Designer software and vector network analyzer. The measured results are in good parity with the simulated one.

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