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Wideband MIMO antennas using decoupling network are presented, which are based on the transversal signal-interference concept. The directional coupler was designed and optimized to make up the decoupling network. Compared with the coupled antennas without the decoupling network, the isolation is more than 15 dB within 1.8–2.7 GHz. For demonstration, an integration of two antennas with the decoupling...
The compact single-layer substrate integrated waveguide (SIW) 3-dB side-wall directional couplers with/without metallic dome for Ku-band monopulse comparator application are studied and demonstrated in this paper. These couplers with/without dome achieve ±0.35 dB/±0.7 dB power equality, −24.7 dB/-16 dB isolation, and −24.4 dB/-15 dB return loss, ±0.60 °/0.12 ° phase difference, respectively, over...
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