A high-isolation antenna array incorporating loaded dummy units (DUs) is proposed for in-band full-duplex (IBFD) applications. Through rigorous network analysis, the electromagnetic coupling between the transmitter (TX) and receiver (RX) is characterized in relation to the DU loads. Based on the network analysis, optimization of the DU loads enables effective reduction of TX-RX coupling without compromising their performances. For validation, an IBFD array with 8-port TX and RX configurations featuring ±45° dual-polarized subarrays was fabricated. The measured results agree well with the simulated results, demonstrating that the proposed array achieves isolation levels exceeding 60 dB across the 4.8–4.9 GHz operational bandwidth. It indicates that the proposed array is a promising candidate for IBFD applications.

Conflicts of Interest

The authors declare no conflicts of interest.

Open Research

Data Availability Statement

The authors have nothing to report.

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Volume67, Issue7

July 2025

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A High Isolation Antenna Array With Loaded Dummy for In-Band Full-Duplex Application

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A High Isolation Antenna Array With Loaded Dummy for In-Band Full-Duplex Application

ABSTRACT

Conflicts of Interest

Open Research

Data Availability Statement

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