G. Zhai, Z. N. Chen, X. Qing and M. Jiang, "Isolation enhancement between two closely spaced substrate integrated cavity-backed slot antennas using mushroom," 2015 Asia-Pacific Microwave Conference (APMC), Nanjing, 2015, pp. 1-3. doi: 10.1109/APMC.2015.7413594
Abstract:
This paper presented a single mushroom-liking loading to enhance the isolation between two closely packed substrate integrated waveguide cavity-backed slot (SICBS) antennas. The mushroom inserted between two SICBS antennas blocks and concentrates part of the spaced-fields radiation from one antenna element, so that an inter-between isolation enhancement is achieved. The two-element parallel directed SICBS antennas (side-to-side) with the mushroom structure, wherein the height of mushroom is 0.04 λ0 (λ0 is the free-space wavelength at the central operating frequency), enhances the inter-between isolation by 8 dB over the operating band (|S11|
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