Journal
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
Volume 69, Issue 3, Pages 1433-1439Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TAP.2020.3016504
Keywords
Magnetic resonance; Antenna arrays; Bandwidth; Polarization; Insertion loss; Magnetic anisotropy; Axial ratio (AR); insertion loss (IL); linear-to-circular polarization converter (LCPC); meander line; split ring resonator (SRR)
Funding
- Fundamental Research Funds for the Central Universities of China [2019XJ01, 2682019CX22]
- Foundation of Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle Ministry of Education
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This article presents a novel method to design a linear-to-circular polarization converter (LCPC) by using a hybrid array structure, which is composed of meander lines and the split ring resonators (SRRs). The designed LCPCs can respond to both the E-Field and H-Field for the incident wave. Simulated and experimental results demonstrate the effectiveness and reliability of the proposed LCPC design method.
This article presents a novel method to design a linear-to-circular polarization converter (LCPC) by using a hybrid array structure, which is composed of meander lines and the split ring resonators (SRRs). The LCPC can respond to both the E-Field and H-Field for the incident wave. When the meander line and the SRR are placed along two orthogonal directions, the composed unit cell would have different electromagnetic response characteristics in the two orthogonal directions. Using this method, two LCPCs working in frequency bands of 6-18 and 2-6 GHz are designed, respectively. The simulated results show that for the LCPC working in 6-18 GHz, the axial ratio (AR) is lower than 3 dB in 6.8-17.32 GHz with a maximum insertion loss (IL) of 1.25 dB. When the angle of incident wave is less than 45 degrees, the 3 dB AR bandwidth is 7.87 GHz. For the LCPC working in 2-6 GHz, the AR of entire frequency band is all lower than 3 dB and the maximum IL is 0.82 dB when the incident angle increases to 15 degrees. Even at incident angle of 45 degrees, the bandwidth with the function of polarization conversion is 3.5 GHz. Experiments on the LCPC (6-18 GHz) are carried out, and the measured results are in agreement with the simulated ones, which proves that the LCPCs design method proposed in this paper is effective and reliable.
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