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In this communication, the self-interference (SI) channel and the novel enabling techniques for a compact inband full-duplex relay are described and characterized in different operating environments. The full-duplex operation is based on a novel antenna design that uses wavetraps to provide passive isolation of up to 70 dB between the transmit and receive antenna ports. The passive isolation is complemented...
A compact T-shaped network for decreasing the port-to-port coupling between two strongly coupled antennas is investigated. The proposed circuit comprises of a pair of transmission lines followed by the T-shaped lumped element network connected between the two feeds of the antenna. Finally, a simple L-section matching circuit is added to each port to retune the input impedance matching. The proposed...
This paper presents a double resonance UHF RFID antenna suitable for most capacitive chips. The antenna incorporates two inductive loops that facilitate broadband matching. The paper studies how different dimensions in the antenna affect the input impedance. It is shown that the input impedance can be tuned with three structural parameters. The wide impedance bandwidth of the antenna improves the...
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