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An aperture coupled microstrip antenna array for high power microwave application.

Liang Xu¹, Cheng-Wei Yuan¹, Qiang Zhang¹

¹The College of Advanced Interdisciplinary, National University of Defense Technology, Changsha 410073, China.

The Review of Scientific Instruments

|October 3, 2019

Summary

This summary is machine-generated.

A novel three-layer aperture coupled microstrip antenna array (ACMA) offers wideband high-power microwave (HPM) capabilities. This innovative design achieves over 50% relative bandwidth and high power capacity, addressing limitations of traditional HPM antennas.

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Area of Science:

Electromagnetics and Wave Propagation
Antenna Engineering
Microwave Engineering

Background:

Traditional microstrip antenna arrays have limited power capacity, hindering their use in high-power microwave (HPM) applications.
Existing HPM antennas often lack the desired characteristics of wide bandwidth, low profile, and ease of manufacturing.
There is a need for advanced antenna solutions that can handle high power while maintaining broad operational frequencies.

Purpose of the Study:

To design and fabricate a three-layer aperture coupled microstrip antenna array (ACMA) for wideband HPM applications.
To overcome the low power capacity limitations of conventional microstrip antenna arrays.
To achieve enhanced relative bandwidth and favorable physical characteristics for HPM systems.

Main Methods:

A three-layer aperture coupled microstrip antenna array (ACMA) was designed using an H-shaped aperture coupled structure.
The array comprises 60 elements, each with four aperture-coupled patch antennas fed by a microstrip line power divider.
A modular design approach was employed, dividing the array into 10 identical modules for easier fabrication and assembly.

Main Results:

The fabricated ACMA demonstrated a relative bandwidth of 51.2% for a voltage standing-wave ratio (VSWR) < 2, covering the frequency range of 1.52 to 2.57 GHz.
Measured gain exceeded 28.8 dB across the entire bandwidth, reaching a maximum of 32.1 dB.
High-power tests confirmed a power capacity exceeding 140 MW, validating the antenna's suitability for HPM applications.

Conclusions:

The proposed three-layer ACMA is a feasible solution for wideband high-power microwave applications.
The H-shaped aperture coupled structure effectively enhances relative bandwidth and power handling capabilities.
The ACMA offers advantages over traditional HPM antennas, including a low profile, wide bandwidth, light weight, and ease of manufacturing.