Suppression of Cross-Band Scattering in Multiband Antenna Arrays

Publication Type:
Journal Article
IEEE Transactions on Antennas and Propagation, 2019
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IEEE This paper presents a novel method of suppressing cross-band scattering in dual-band dual-polarized antenna arrays. The method involves introducing chokes into low-band (LB) elements to suppress high-band (HB) scattering currents. Experimental results show that by inserting LB-pass HB-stop chokes into LB radiators, suppression of induced HB currents on the LB elements is achieved. This greatly reduces the pattern distortion of the HB array caused by the presence of LB elements. The array considered is configured as two columns of HB antennas operating from 1.71 GHz to 2.28 GHz interleaved with a single column of LB antennas operating from 0.82 GHz to 1.0 GHz. The realized array with choked LB element has stable and symmetrical radiation in both high and low bands.
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