Dual-polarized 2x2 element sub-array at 15 GHz with high port isolation
Sonkki, Marko; Myllymäki, Sami; Putaala, Jussi; Sobocinski, Maciej; Pärssinen, Aarno; Heikkinen, Eero; Haapala, Tomi; Nikkanen, Kari (2017-07-17)
M. Sonkki et al., "Dual-polarized 2×2 element sub-array at 15 GHz with high port isolation," 2017 European Conference on Networks and Communications (EuCNC), Oulu, 2017, pp. 1-4. doi: 10.1109/EuCNC.2017.7980692
© 2017 European Union. Published by IEEE.
This paper presents simulation results of a dual-polarized 2×2 element sub-array antenna element at 15 GHz center frequency. The basic idea is to use two waveguides stacked on in a right-angle configuration to excite the orthogonal polarizations by using radiating slots. Above the slots, 4 parasitic patches are set to a form of 2×2 element sub-array. Antenna presents -10 dB impedance bandwidth from 14.3 to 15.6 GHz with better than 68 dB isolation between the excitation ports. At the aforementioned bandwidth, the total efficiency is better than -0.7 dB (> 85%). Antenna shows very good polarization properties and difference between φ, θ components is greater than 45 dB. Also the radiation patterns and surface current distributions at 15 GHz center frequency are presented and compared.
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