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Resonance Analysis and Gain Estimation Using CMA-Based Even Mode Combination Method for Flexible Wideband Antennas.

Bashar Bahaa Qas Elias¹, Ping Jack Soh²

¹Department of Communications Technology Engineering, College of Information Technology, Imam Ja'afar Al-Sadiq University, Baghdad 10052, Iraq.

Sensors (Basel, Switzerland)

|June 10, 2023

Summary

This study introduces an efficient method using Characteristic Mode Analysis (CMA) to design wideband antennas from flexible materials. The Even Mode Combination (EMC) method accurately predicts antenna gain, offering a faster alternative to simulations.

Keywords:

characteristic mode analysis even mode combination flexible antennas wideband antennas

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Area of Science:

Antenna Engineering
Electromagnetics
Materials Science

Background:

Flexible antennas are crucial for modern wireless applications.
Efficient design methods are needed to optimize antenna performance.
Characteristic Mode Analysis (CMA) is a powerful tool for antenna design.

Purpose of the Study:

To present an efficient design and optimization method for wideband antennas using flexible materials.
To introduce the Even Mode Combination (EMC) method based on CMA for predicting antenna resonance and gain.
To validate the EMC method by comparing its results with full-wave simulations.

Main Methods:

Characteristic Mode Analysis (CMA) was employed for antenna design.
The Even Mode Combination (EMC) method was developed to estimate forward gain by summing electric field magnitudes of dominant modes.
Two compact, flexible planar monopole antennas were designed and analyzed using different substrates and feeding techniques.

Main Results:

The EMC method accurately predicted the resonance and gain of the designed flexible antennas.
The first antenna, on Kapton polyimide with coplanar waveguide feed, operated from 2 to 5.27 GHz.
The second antenna, on felt textile with microstrip line feed, operated from 2.99 to 5.57 GHz.
Results showed good agreement with full-wave simulations, demonstrating the EMC method's efficiency.

Conclusions:

The EMC method based on CMA provides an efficient and accurate approach for designing and optimizing wideband antennas from flexible materials.
This method offers a less resource-intensive alternative to traditional full-wave simulations.
The developed antennas demonstrate competitive bandwidth and compactness for various wireless applications.