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A Compact Millimeter-Wave Multilayer Patch Antenna Array Based on a Mixed CPW-Slot-Couple Feeding Network.

Kun Deng¹, Naibo Zhang¹, Guangyao Yang¹

¹Beijing Research and Development Center, The 54th Research Institute of China Electronics Technology Group Corporation (CETC 54), Beijing 100070, China.

|April 27, 2024

Summary

A novel Ka-band antenna array offers broadband, high gain for millimeter-wave systems. This compact design utilizes a multilayer structure and specialized feeding network for enhanced performance.

Keywords:

CPW feeding network characteristic mode analysis (CMA)millimeter-wave antenna array patch antennas

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Area of Science:

Electromagnetics and Wave Propagation
Antenna Theory and Design
Microwave Engineering

Background:

Millimeter-wave (mmWave) applications demand antennas with high gain and wide bandwidth.
Existing antenna designs often face challenges in achieving both miniaturization and broadband performance simultaneously.
Compact antenna solutions are crucial for emerging wireless communication systems.

Purpose of the Study:

To propose and demonstrate a compact Ka-band antenna array with broadband and high gain capabilities.
To investigate the use of characteristic mode analysis for bandwidth enhancement.
To validate the design through fabrication and measurement of a prototype antenna array.

Main Methods:

Design of a multilayer antenna array featuring driven slot patch and parasitic patch layers.
Implementation of a mixed Coplanar Waveguide (CPW)-Slot-Couple feeding network.
Application of characteristic mode analysis to introduce coupling slots for resonant frequency alignment.
Fabrication and measurement of a 4x4x3 antenna array prototype.

Main Results:

Achieved a frequency bandwidth of 25 GHz to 32 GHz, corresponding to a relative bandwidth of 24.5%.
Obtained a peak gain of 20.1 dBi.
Demonstrated successful miniaturization and broadband characteristics.
Validated the effectiveness of the proposed design and feeding network.

Conclusions:

The proposed compact Ka-band antenna array effectively achieves broadband operation and high gain.
The integration of coupling slots and the CPW-Slot-Couple feeding network are key to the enhanced performance.
The antenna array shows significant potential for application in millimeter-wave wireless communication systems.