A half-width microstrip leaky wave antenna (LWA) with periodic short circuits is presented. The backward-to-forward beam-scanning capability is achieved by periodic construction. The proposed antenna consists of a long rectangular patch with the short circuits that are placed with a series of shorting pins between the antenna patch and the ground plane periodically. The measurement results show that the main lobe scans electronically from 144°to 41°in H-plane (y-zplane) toward endfire (+zdirection) with an open stopband when the operating frequency is increased from 4.4 GHz to 8.8 GHz.
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Li et al. (2011) studied this question.
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