Broadband Decoupled Monolithic Dielectric Patch Antenna /Array

A novel broadband decoupling method is presented in this paper, which is suitable for the monolithic dielectric patch (DP) antenna (DPA) /array. By introducing the air slots into the DP, the E-field distributions of the TM
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and TE
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modes inside the DP are moved to the unetched part. In this way, the mutual couplings among the ports can be suppressed effectively in wide bandwidth. For demonstration, the broadband co-polarized antenna for the in-band full-duplex (IBFD) applications and the monolithic multi-element DPA array with steerable beam characteristic are designed and fabricated. Measured results show that the isolation of the co-polarized antenna higher than 28 dB with a maximum isolation of 49.8 dB is achieved over the operating bandwidth of about 18% (|S
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|< -10dB). Meantime, the mutual couplings for the monolithic DPA array are both lower than -21.5 dB with bandwidth 16.9%.