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Progress In Electromagnetics Research
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A COMPACT DUAL-POLARIZED BROADBAND ANTENNA WITH HYBRID BEAM-FORMING CAPABILITIES

By H.-L. Peng, W.-Y. Yin, J.-F. Mao, D. Huo, X. Hang, and L. Zhou

Full Article PDF (1,803 KB)

Abstract:
A broadband dual-polarized four-port (DPFP) antenna is presented in this paper, which consists of a radiation element and a feed network. It is very compact in size, with the diameter of 150.0 mm and the height of 47.0 mm, with the following unique properties: (1) it has hybrid beam-forming capability and operates at two modes, which depends on its excitation; (2) its operating frequency range is from 0.96 to1.78 GHz, and the return loss is about 10 dB; (\ref{eq3}) its insertion loss is (3±0.5) dB, with its balanced power splitting over the relative bandwidths of 37% at Mode 1 (180°±5° phase shifting) and 55% at Mode 2 (±5° phase shifting), respectively; (\ref{eq4}) an isolation of 30 dB at Mode 1 is obtained between the dual polarized ports, with the gain of 7.6 dBi and 42° of the 3 dB-bandwidth at 1.25 GHz; and (5) the gain difference between Modes 1 and 2 is about 7 dB, within the angle of -15° ≤ θ ≤ 15° for the same polarization at 1.25 GHz. For the application of DPFP, a hybrid beam forming algorithm is proposed with an angular precision of 3°, as validated by measurement.

Citation:
H.-L. Peng, W.-Y. Yin, J.-F. Mao, D. Huo, X. Hang, and L. Zhou, "A Compact Dual-Polarized Broadband Antenna with Hybrid Beam-Forming Capabilities," Progress In Electromagnetics Research, Vol. 118, 253-271, 2011.
doi:10.2528/PIER11042905
http://www.jpier.org/PIER/pier.php?paper=11042905

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