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학술지 Broadband Circularly Polarized Crossed Dipole With Parasitic Loop Resonators and Its Arrays
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백정우, 이태학, 표성민, 한상민, 정지채, 김영식
IEEE Transactions on Antennas and Propagation, v.59 no.1, pp.80-88
10MR3500, 메타 전자파 구조를 이용한 전파(RF)스펙트럼 개선 기술 연구, 최재익
A novel printed crossed dipole with broad axial ratio (AR) bandwidth is proposed. The proposed dipole consists of two dipoles crossed through a 90째 phase delay line, which produces one minimum AR point due to the sequentially rotated configuration and four parasitic loops, which generate one additional minimum AR point. By combining these two minimum AR points, the proposed dipole achieves a broadband circularly polarized (CP) performance. The proposed antenna has not only a broad 3 dB AR bandwidth of 28.6% (0.75 GHz, 2.253.0 GHz) with respect to the CP center frequency 2.625 GHz, but also a broad impedance bandwidth for a voltage standing wave ratio (VSWR) ?돞q2 of 38.2% (0.93 GHz, 1.972.9 GHz) centered at 2.435 GHz and a peak CP gain of 8.34 dBic. Its arrays of 1 × 2 and 2 × 2 arrangement yield 3 dB AR bandwidths of 50.7% (1.36 GHz, 23.36 GHz) with respect to the CP center frequency, 2.68 GHz, and 56.4% (1.53 GHz, 1.953.48 GHz) at the CP center frequency, 2.715 GHz, respectively. This paper deals with the designs and experimental results of the proposed crossed dipole with parasitic loop resonators and its arrays. © 2006 IEEE.
KSP 제안 키워드
15 GHz, 3.5 GHz, 6 GHz, Center frequency, Circularly polarized, Loop resonator, Parasitic loop, Voltage Standing Wave Ratio(VSWR), axial ratio (AR) bandwidth, crossed dipoles, delay line