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Broadband beam scanning circularly-polarised leaky-wave antenna based on modified substrate integrated waveguide

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3 Author(s)
Jin, C. ; Inst. of Microelectron., A*Star, Singapore, Singapore ; Mujumdar, M. ; Alphones, A.

A high gain broadband beam scanning circularly-polarised (CP) leakywave antenna (LWA) is proposed based on a modified substrate integrated waveguide. The designed CP LWA has been fabricated and its performance measured. The reported antenna presents expected broadband matched impedance with a measured reflection coefficient |S11| <;- 10 dB from 15.4 to 19 GHz. The radiation pattern was measured and the axial ratio of the antenna is within 3 dB from 15.9 to 17.2 GHz. The antenna exhibits continuous beam scanning from 35° at 15.5 GHz to 47° at 18 GHz according to the broadside with maximum gain of 12.3 dBi.

Published in:

Electronics Letters  (Volume:49 ,  Issue: 5 )