scholarly journals Low Cross-Polarization Improved-Gain Rectangular Patch Antenna

Electronics ◽  
2019 ◽  
Vol 8 (10) ◽  
pp. 1189 ◽  
Author(s):  
Anurag Singh ◽  
Sandip Vijay ◽  
Rudra Narayan Baral
Keyword(s):  
Patch Antenna ◽  
Frequency Selective Surface ◽  
Cross Polarization ◽  
Gain Enhancement ◽  
Rectangular Patch ◽  
Shorting Pin ◽  
Half Power ◽  
Broadside Radiation ◽  
Polarization Level ◽  
Good Agreement

In this paper, a low cross-polarization improved-gain rectangular patch antenna is presented. A patch-ground shorting pin with defected patch structure (DPS) is introduced to suppress the cross-polarization level. A High Reflective Frequency Selective Surface (HRFSS) superstrate is designed and placed over the proposed antenna at an optimized position to intensify the gain. To characterize the unit-cell of the superstrate, its transmission characteristics are extracted and discussed. Integration of the superstrate achieves a beam contraction resulting in a gain enhancement to 10.65 dBi. The proposed antenna has perfect broadside radiation with a cross-polarization level of below −30 dB in the entire half power beamwidth. The prototype of the antenna exhibits good agreement between experimental and simulated results.

scholarly journals Cross-polarization suppression in C-shaped microstrip patch antenna employing anisotropic dielectrics

2017 ◽  
Vol 07 (04) ◽  
pp. 1750026 ◽  
Author(s):  
Hongyu Shi ◽  
Shitao Zhu ◽  
Jianxing Li ◽  
Anxue Zhang ◽  
Zhuo Xu
Keyword(s):  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Cross Polarization ◽  
Anisotropic Dielectric ◽  
Gain Enhancement ◽  
Microstrip Patch ◽  
Anisotropic Dielectrics ◽  
The Cross ◽  
Polarization Level ◽  
Layered Ceramic

An anisotropic dielectric realized by layered ceramic structures was adopted to design a low cross-polarization C-shaped patch antenna. The anisotropic dielectric performs as a substrate and can cause additional cross-polarized fields which are able to cancel the cross-polarized fields generated by the C-shaped patch itself, and then reduce the cross-polarization level. Compared to the C-shaped patch antenna with an isotropic substrate, the cross-polarization of the proposed antenna is suppressed by more than 15[Formula: see text]dB with a little gain enhancement at 2.4[Formula: see text]GHz. The anisotropic dielectric has a little impact on the direction of the C-shaped patch antenna. The gain of the proposed C-shaped patch antenna is 6.8[Formula: see text]dB with a cross-polarization of [Formula: see text]28[Formula: see text]dB.

scholarly journals The Strip-Ground Rectangular Patch Antenna

2017 ◽  
Vol 2017 ◽  
pp. 1-7 ◽  
Author(s):  
Yiying Wang ◽  
Yinghua Lu
Keyword(s):  
Patch Antenna ◽  
Coaxial Cable ◽  
Center Line ◽  
Cross Polarization ◽  
Solid Ground ◽  
Wearable Antenna ◽  
Rectangular Patch ◽  
Antenna Performance ◽  
Gap Ratio ◽  
Good Agreement

To imitate the broken situation of the conductive threads of the wearable antenna, a strip-ground design of rectangular patch antenna with the conventional substrate is presented to investigate the change of the antenna performance, where the ground is sliced along its E-plane. The strips are symmetrical along the center line of the width of the patch, and the gap ratio of the gap to the solid ground varies with the change of gaps. The conventional patch antenna is used as a reference for comparison with the stripe-ground antennas. And the effect of the coaxial cable, the changes of the impedance, and the cross-polarization of the antenna are investigated. Several antenna prototypes are fabricated and their measured results are in good agreement with the simulations. These results show that the gaps change the performance of the strip-ground antennas, but they can work well if the gap ratio is less than 1 : 4.

scholarly journals A Wideband Metal-Only Patch Antenna for CubeSat

Electronics ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 50
Author(s):  
Suhila Abulgasem ◽  
Faisel Tubbal ◽  
Raad Raad ◽  
Panagiotis Ioannis Theoharis ◽  
Sining Liu ◽  
...  
Keyword(s):  
Patch Antenna ◽  
High Efficiency ◽  
Ground Plane ◽  
High Gain ◽  
Reflection Coefficients ◽  
Cross Polarization ◽  
Gain Bandwidth ◽  
Simulation Results ◽  
Polarization Level ◽  
Good Agreement

This article presents a compact wideband high gain patch antenna for CubeSat. The proposed metal-only antenna mainly consists of an upper patch, a folded ramp-shaped patch and shoring pins connecting the antenna with the ground plane. By adjusting the lengths and widths of two arms of the upper F-shaped patch, a second resonant frequency is generated, and hence, the −10 dB bandwidth is increased. Moreover, the effect of arms’ lengths and widths on reflection coefficients, operating frequency and bandwidth is presented. To validate the design and the simulation results, a prototype metal-only patch antenna was fabricated and tested in a Chamber. A good agreement between the simulated and measured results is achieved. The measured results show that the fabricated prototype achieves a −10 dB bandwidth of 44.9% (1.6–2.7 GHz), a small reflection coefficient of −24.4 dB and a high efficiency, i.e., 85% at 2.45 GHz. The radiation performance of the proposed antenna is measured, showing a peak realized gain of 8.5 dBi with cross polarization level less than −20 dB at 2.45 GHz and a 3 dB gain bandwidth of 61.22%.

Gain enhancement of microstrip patch antenna using Sierpinski fractal-shaped EBG

2015 ◽  
Vol 8 (6) ◽  
pp. 915-919 ◽  
Author(s):  
Neeraj Rao ◽  
Dinesh Kumar Vishwakarma
Keyword(s):  
Patch Antenna ◽  
High Frequency ◽  
Microstrip Patch Antenna ◽  
Patch Antennas ◽  
Electromagnetic Band Gap ◽  
Gain Enhancement ◽  
Microstrip Patch Antennas ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Frequency Components

This is the first report on novel mushroom-type electromagnetic band gap (EBG) structures, consisting of fractal periodic elements, used for enhancing the gain of microstrip patch antennas. Using CST Microwave studio the performance of rectangular patch antenna has been examined on proposed fractal EBG substrates. It is found that fractal EBGs are more effective in suppressing surface wave thus resulting in higher gain. The gain of rectangular patch has been improved from 6.88 to 10.67 dBi. The proposed fractal EBG will open new avenues for the design and development of variety of high-frequency components and devices with enhanced performance.

scholarly journals Design, Simulation and Fabrication of an Implanted Antenna at ISM Band in Body Tissue

2021 ◽  
Author(s):  
Majedeh Seydi ◽  
Mohammad Sajjad Bayati
Keyword(s):  
Patch Antenna ◽  
Biomedical Applications ◽  
Impedance Matching ◽  
Ism Band ◽  
Microstrip Patch ◽  
Rectangular Patch ◽  
Shorting Pin ◽  
L 14 ◽  
Minced Meat ◽  
Coaxial Probe

Abstract A rectangular meandering-microstrip patch antenna (RM-MPA) with shorting pin for implant antenna and biomedical applications at industrial, scientific, and medical (ISM) band is proposed. The rectangular patch has length of l =14 mm and width of w =9.4 mm. The substrate and superstrate are made of Rogers 3210 with dielectric constant equals 10.2. The RMMPA is placed between the substrate and superstrate dielectric layers whose same thickness equals 0.635 mm. The proposed antenna is fed by a 50-ohm coaxial probe, at the centre of the length and edge of the width of the patch. The input impedance of patch antenna varies with the patch geometry. Thus, the geometry of the patch changed to achieve impedance matching at ISM band. The rectangular patch divided to three sections along width for meandering. The resonance frequency is tuned by meandering each section. The proposed antenna is simulated in free space and skin phantom. Proposed antenna has efficiency of 90%, bandwidth 1.02%. Both radiation pattern and SAR are evaluated which SAR level is below the safety and satisfies SAR standards. Finally, the antenna is tested in minced meat and tissue liquid.

scholarly journals Dual-Band Patch Antenna Fed by Meandering Probe for Low Cross-Polarization

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Xiao-Lan Zhao ◽  
Quan Wei Lin
Keyword(s):  
Reflection Coefficient ◽  
Patch Antenna ◽  
Dual Band ◽  
Cross Polarization ◽  
Frequency Range ◽  
Face To Face ◽  
Resonance Modes ◽  
The Cross ◽  
Polarization Level

This paper presents a dual-band patch antenna loaded with face-to-face U-shaped slots fed by a substrate-integrated meandering probe (SIM-probe). With the presence of U-shaped slots, two current paths are formed, which leads to the resonance modes at 2.4 and 3.65 GHz on the patch. The SIM-probe suppresses the unwanted cross-polarization radiations by providing out-of-phase vertical currents from vertical metallic vias. To verify our work, a prototype was fabricated and tested. The proposed antenna achieves the impedance bandwidths of 9.4% and 9% from the frequency range of 2.34–2.57 GHz and 3.5–3.83 GHz (for the reflection coefficient ≤ −10 dB) and obtains average gains of 5.8 dBi and 6.8 dBi at both bands. The cross-polarization level is below −20 dB. Measured results agree well with the simulation.

Cross-Polarization Reduction of a Shorted Patch Antenna With Broadside Radiation Using a Pair of Open-Ended Stubs

2020 ◽  
Vol 68 (1) ◽  
pp. 13-20 ◽  
Author(s):  
Neng-Wu Liu ◽  
Lei Zhu ◽  
Zhong-Xun Liu ◽  
Zhi-Ya Zhang ◽  
Guang Fu ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Cross Polarization ◽  
Broadside Radiation

scholarly journals Novel Design of Microstrip Antenna with Improved Bandwidth

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Km. Kamakshi ◽  
Ashish Singh ◽  
Mohammad Aneesh ◽  
J. A. Ansari
Keyword(s):  
Radiation Pattern ◽  
Patch Antenna ◽  
Microstrip Antenna ◽  
Proper Selection ◽  
Antenna Structure ◽  
Inclination Angles ◽  
Broadside Radiation ◽  
Novel Design ◽  
Selection Of ◽  
Good Agreement

A novel design of broadband patch antenna is presented in this paper. The broadband property of the proposed antenna is achieved by choosing a proper selection of dimensions and positions of slot and notch on the radiating patch. The bandwidth of the proposed antenna is found to be 30.5% with operating frequency band from 1.56 GHz to 2.12 GHz. Antenna characteristics are observed for different inclination angles “α” and its effect on bandwidths is also reported. The maximum gain of the antenna is found to be 9.86 dBi and it achieves broadside radiation pattern in the direction of maximum radiation over the operating band. The proposed antenna structure is simulated, fabricated, and tested for obtaining the desired performance. The simulated results are verified with experimental results which are in good agreement.

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