Dual-linear polarized cavity-backed sinuous antenna with non-sequential feeding

Ramanan Balakrishnan (1, 2) , Hongzhao Ray Fang (2, 1) , Israël Hinostroza (2) , Régis Guinvarc'H (2) , Koenraad Mouthaan (1) , Mohammed Serhir (3)

1 Department of Electrical and Computer Engineering [Univ. Singapore]
2 SONDRA - Sondra, CentraleSupélec, Université Paris-Saclay (COmUE)
3 DRE - Département de Recherche en Electromagnétisme ; EMG - Département Electromagnétisme - L2S

A new technique is presented to realize dual-linear polarization in four-arm sinuous antennas by simultaneously exciting all four arms of the antenna with a non-sequentially phased input. A hollow metallic cavity backing is used to obtain unidirectional radiation. The antenna exhibits a low input reflection coefficient in multiple bands across a frequency range from 1 to 4 GHz. A high level of cross-polarization rejection throughout the bandwidth of operation is demonstrated. Measurements show good agreement wtih electromagnetic simulation results.

Mots clés: Sinuous Antenna; spiral antenna

Domaines: Electromagnétisme; Sciences de l'ingénieur [physics]

Ramanan Balakrishnan, Hongzhao Ray Fang, Israël Hinostroza, Régis Guinvarc'H, Koenraad Mouthaan, et al.. Dual-linear polarized cavity-backed sinuous antenna with non-sequential feeding. 8th European Conference on Antennas and Propagation (EuCAP 2014) , IEEE, Apr 2014, The Hague, Netherlands. pp.1199 - 1201, ⟨10.1109/EuCAP.2014.6901988⟩. ⟨hal-01104550⟩