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Yang, Yu-Hang; Sun, Bao-Hua; Guo, Jing-Li
IEEE antennas and wireless propagation letters, 04/2019, Letnik: 18, Številka: 4Journal Article
This letter presents a low-cost, single-layer, dual circularly polarized (CP) series-fed antenna based on the sequential rotation technique for millimeter-wave (MM-wave) applications. The series-fed working form endows the proposed antenna with more compact structure and lower ohmic, dielectric losses caused by the feeding network compared with parallel-fed antennas. The curved microstrip transmission lines are adopted as radiation elements; therefore, the whole antenna can be etched on a single-layer laminate using standard printed circuit board technology. These characteristics make the antenna a competitive candidate for MM-wave applications. To validate the proposed design, a dual-CP antenna operating at 30 GHz is fabricated. Based on the measurement, the proposed antenna has a 3 dB gain bandwidth of 1.97 GHz, the measured |S 21 | is lower than -20 dB, and the axial ratios are lower than 3 dB in the aforementioned frequencies.
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