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Broadband printed circularly-polarised aperture antenna array for millimetre-wave gigabit applications

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2 Author(s)
Hung, K.-F. ; Grad. Inst. of Commun. Eng., Nat. Taiwan Univ., Taipei ; Lin, Y.-C.

A simple and successful design of a printed aperture antenna array is presented in view of high-speed millimetre-wave wireless access applications. The antenna element design is based on a broadband travelling-wave aperture antenna for circularly-polarised radiation. For the antenna array design, the sequential rotation scheme is employed for improving the co-polarised gain and axial ratio. The presented antenna array is designed in the 40-48 GHz band and implemented with a 5mil-thick RT/Duroid-5880 PCB. Promising performances are achieved, including a return loss (<10 dB) bandwidth of 32%, an axial ratio (<3 dB) bandwidth of 25%, and a co-polarised gain (flatness <3 dB) bandwidth of 32% with a maximum gain of 11 dBic.

Published in:

Electronics Letters  (Volume:44 ,  Issue: 25 )