scholarly journals Out-of-Band Mutual Coupling Suppression for Microstrip Antennas Using Characteristic Mode Analysis and Shorting Pins

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 102679-102688 ◽  
Author(s):  
Zhenpeng Ma ◽  
Zhao Yang ◽  
Qi Wu ◽  
Donglin Su
Keyword(s):  
Mutual Coupling ◽  
Microstrip Antennas ◽  
Mode Analysis ◽  
Characteristic Mode

scholarly journals Metamaterial superstrate microstrip patch antenna for 5G wireless communication based on the theory of characteristic modes

2019 ◽  
Vol 70 (3) ◽  
pp. 187-197
Author(s):  
Ehab K. I. Hamad ◽  
Ahmed Abdelaziz
Keyword(s):  
Wireless Communication ◽  
Patch Antenna ◽  
Split Ring Resonator ◽  
Microstrip Antennas ◽  
Unit Cell ◽  
Dual Band ◽  
Mode Analysis ◽  
Electromagnetic Properties ◽  
Characteristic Mode ◽  
Antenna Structure

Abstract Metamaterials (MTMs) have received considerable attention due to their novel electromagnetic properties. Their applications include enhancing gain and bandwidth in microstrip antennas. In this article, a dual band microstrip antenna design based on characteristic mode analysis (CMA) using MTM superstrate is proposed for 5G wireless communication. The CMA is used for the modelling, analysis and optimization of the proposed antenna to examine the underlying modal behaviour of the MTM unit cell and to guide mode excitation. The antenna structure consists of a microstrip feed line connected to a rectangular patch. Then triangular split ring resonator unit cell is inserted on the ground of a traditional patch antenna that resonates at 15 GHz to produce additional resonance at 10 GHz. A planar array of 2 × 3 triangle MTM unit cells is used as superstrate to improve the gain and bandwidth at both resonances simultaneously. The optimal distance between MTM superstrate and the antenna patch is determined using the Fabry-Perot cavity theory to maximize power directivity and efficiency of the proposed antenna. The CST microwave studio software is used to model and optimize the proposed antenna. A prototype of the designed antenna that was fabricated showed good agreement between measurement and simulation results.

scholarly journals Characteristic mode analysis applied to reduce the mutual coupling of a four‐element patch MIMO antenna using a defected ground structure

2019 ◽  
Vol 14 (2) ◽  
pp. 215-226 ◽  
Author(s):  
Erik Fritz‐Andrade ◽  
Angel Perez‐Miguel ◽  
Ricardo Gomez‐Villanueva ◽  
Hildeberto Jardon‐Aguilar
Keyword(s):  
Mutual Coupling ◽  
Mode Analysis ◽  
Defected Ground Structure ◽  
Ground Structure ◽  
Characteristic Mode ◽  
Mimo Antenna

scholarly journals Metamaterial Based Design of Compact UWB/MIMO Monopoles Antenna with Characteristic Mode Analysis

2021 ◽  
Vol 11 (4) ◽  
pp. 1542
Author(s):  
Adamu Halilu Jabire ◽  
Adnan Ghaffar ◽  
Xue Jun Li ◽  
Anas Abdu ◽  
Sani Saminu ◽  
...  
Keyword(s):  
Mutual Coupling ◽  
Ground Plane ◽  
Multiple Input Multiple Output ◽  
Surface Current ◽  
Dominant Mode ◽  
Mode Analysis ◽  
Physical Parameters ◽  
Antenna Aperture ◽  
Characteristic Mode ◽  
Mutual Coupling Reduction

In this article, a novel metamaterial inspired UWB/multiple-input-multiple-output (MIMO) antenna is presented. The proposed antenna consists of a circular metallic part which formed the patch and a partial ground plane. Metamaterial structure is loaded at the top side of the patches for bandwidth improvement and mutual coupling reduction. The proposed antenna provides UWB mode of operation from 2.6–12 GHz. The characteristic mode theory is applied to examine each physical mode of the antenna aperture and access its many physical parameters without exciting the antenna. Mode 2 was the dominant mode among the three modes used. Considering the almost inevitable presence of mutual coupling effects within compact multiport antennas, we developed an additional decoupling technique in the form of perturbed stubs, which leads to a mutual coupling reduction of less than 20 dB. Finally, different performance parameters of the system, such as envelope correlation coefficient (ECC), channel capacity loss (CCL), diversity gain, total active reflection coefficient (TARC), mean effective gain (MEG), surface current, and radiation pattern, are presented. A prototype antenna is fabricated and measured for validation.

Characteristic Mode Analysis of Mutual Coupling

2021 ◽  
pp. 1-1
Author(s):  
Sandip Ghosal ◽  
Rakesh Sinha ◽  
Arijit De ◽  
Ajay Chakrabarty
Keyword(s):  
Mutual Coupling ◽  
Mode Analysis ◽  
Characteristic Mode

scholarly journals Mixed-Potential Integral Equation Based Characteristic Mode Analysis of Microstrip Antennas

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Yikai Chen ◽  
Liwen Guo ◽  
Shiwen Yang
Keyword(s):  
Integral Equation ◽  
Modal Analysis ◽  
Green's Functions ◽  
Green’S Functions ◽  
Microstrip Antennas ◽  
Spatial Domain ◽  
Mode Analysis ◽  
Mixed Potential ◽  
Multilayered Media ◽  
Characteristic Mode

A characteristic mode (CM) formulation is developed for the modal analysis of microstrip antennas. It is derived from the mixed-potential integral equation (MPIE) with spatial-domain Green’s functions for multilayered media, where spatial-domain Green’s functions take into account the effect of the multilayered media. The resultant characteristic currents and fields are orthogonal with each other among different orders of modes. Together with the eigenvalues and their deduced indicators, the CMs provide deep physical insights into the radiation mechanisms of microstrip antennas. Numerical results are presented to confirm CM formulation’s effectiveness and accuracy in determining the resonant frequencies, radiating mode currents, and modal fields of microstrip antennas. As opposed to the very popular CM formulation for conducting bodies, comparative studies are presented to show the quite different modal analysis results by considering the multilayered media.

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