A wideband co-linearly-polarized magnetoelectric (ME) dipole antenna is proposed for the in-band full-duplex (IBFD) application, having identical radiation properties in the operating frequency band. Good isolation between the transmitting and receiving ports is obtained over a wide frequency range by modifying the shared central part of the ME dipole without a complex feeding structure. The central part is a defected rectangular tube suspended above the ground. To validate the proposed antenna, a prototype is fabricated and measured. The measured port isolation is higher than 22 dB over the operating frequency band from 1.90 to 2.91 GHz (42.0%). The proposed antenna has a simple structure and good wideband radiation performance, with high potential for IBFD applications.
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Tan et al. (2023) studied this question.
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