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Concentric ring array of connecting spirals with WAVES

Abstract : A dual circularly polarized wideband array working over a 2:1 bandwidth was previously developed. This array had the following requirements: 2:1 bandwidth, capable of steering up to 30° in theta, dual circular polarization, Relative Sidelobe Level (RSLL) <; -10dB, Axial Ratio (AR) <; 3dB and reflection coefficient (S11) <; -10dB. In this paper, we extend the array bandwidth to 15:1 through adding connections between the arms of neighboring spirals to improve the S11 at lower frequencies and using the WAVES (Wideband Array with Variable Element Size) technique to reduce the RSLL at higher frequencies.
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Submitted on : Thursday, January 25, 2018 - 12:00:19 PM
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Pedro Mendes Ruiz, Israël Hinostroza, Regis Guinvarcah, Randy L. Haupt. Concentric ring array of connecting spirals with WAVES. 2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting, Jul 2017, San Diego, France. ⟨10.1109/APUSNCURSINRSM.2017.8072566⟩. ⟨hal-01692595⟩



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