Improvement of Isolation between Transmitting and Receiving Antennas of E-plane arranged Waveguide Slot Arrays by using Layers of Slit pairs with Half-wavelength Spacing

Kohei Jitosho, Takashi Tomura, Jiro Hirokawa
2020 IEICE Communications Express  
In this paper, we propose loading layers of slit pairs with halfwavelength spacing over a corporate-feed waveguide slot array antenna in the 30 GHz band. This structure is expected to improve the isolation between transmitting and receiving antennas arranged in the E-plane. As a result of the design, the reflection of the radiating element is suppressed under −14 dB over a target band . The isolation between two antennas using a 2 × 32-element model is improved by about 20 dB compared to the
more » ... ventional structure without the slit-pair layers. We demonstrate this result by measurement using 64 × 32-element arrays.
doi:10.1587/comex.2020xbl0148 fatcat:w3lezhvxb5a6zbxsydrpfvek2m