Flexible Coupler Antenna for Wireless Networks: Opportunities and Challenges
Xiaodan Shao, Chuangye Shan, Weihua Zhuang, Xuemin Shen

TL;DR
Flexible coupler antennas (FCA) offer a cost-effective, compact solution for enhancing wireless network performance through mechanical beamforming and interference mitigation, suitable for SWAP-constrained devices.
Contribution
This paper introduces FCA as a novel technique for wireless networks, detailing its system modeling, implementation, advantages, and capacity gains over existing methods.
Findings
FCA achieves significant beamforming gain and path-loss reduction.
FCA enhances spatial multiplexing and interference suppression.
Numerical results show substantial capacity improvements with FCA.
Abstract
Flexible coupler antenna (FCA) is a new technique that aims to improve the performance of wireless communication networks by smartly translating low-cost passive couplers around fixed-position active antennas to reshape the induced currents on the passive elements for radiation. Specifically, different couplers can independently control their positions/rotations at the transceiver and thereby collaboratively achieve mechanical beamforming for directional signal enhancement or nulling. The position and/or rotation reconfiguration of passive couplers provides a new and cost-effective means of enhancing wireless communication performance, while significantly reducing the antenna and radio-frequency (RF) chain costs of conventional active arrays. The compact and low form-factor structure of the FCA makes it particularly appealing for devices with stringent size, weight, and power (SWAP)…
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