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A low‐cost variable polarization reflectarray based on controllable wave‐path difference
Author(s) -
Wang Quan,
Shao Zhen Hai,
Jin Mou Ping,
Zhang Xiao Lin,
Fang Jia,
Chen Qian,
Zou Wen Man
Publication year - 2019
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.31860
Subject(s) - polarization (electrochemistry) , phase difference , optics , offset (computer science) , orthogonal polarization spectral imaging , linear polarization , physics , group delay and phase delay , dipole , materials science , phase (matter) , telecommunications , bandwidth (computing) , computer science , laser , chemistry , quantum mechanics , programming language
A variable polarization reflectarray antenna is investigated in this communication. It consists of the dual‐layer three parallel dipole loops (TPDLs) to independently control the reflected spatial compensative phase and the phase difference of two orthogonal LP components. In this case, the proposed variable polarization reflectarray can transform a linear polarization (LP) mode into an arbitrary polarization mode by simply rotating the feeder and adjusting the wave‐path difference between the dual‐layer TPDL. A detailed operating mechanism of the variable polarization is introduced in this work. As an example, a 13 × 13‐element offset reflectarray is designed, fabricated, and measured. Four different polarization states of right‐hand circularly polarized (RHCP), 45°LP, left‐hand CP (LHCP), and 135°LP are measured and validated with a specific incident LP wave. The measured gains of 22 dB and 1.5‐dB gain bandwidths of 11% are achieved for all the states. This new reflectarray antenna is especially useful for low‐cost variable polarization applications.