A Narrow-Band Circularly Polarized Microstrip Leaky-Wave Antenna With The Open Stopband Suppressed

2020 INTERNATIONAL CONFERENCE ON MICROWAVE AND MILLIMETER WAVE TECHNOLOGY (ICMMT 2020 ONLINE)(2020)

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Abstract
In this paper, a narrow-band circularly polarized (CP) microstrip leaky-wave antenna (LWA) with open stopband suppressed is proposed. The asymmetric element is introduced in the antenna to realize zero-crossing beam scanning and CP characteristic. The meandered-line slow-wave structure for the whole antenna is used to narrow the band. In the operating band of 8.2-8.6 GHz, measured scanning angel of the fabricated antenna is from -30 degrees to +7 degrees. The antenna axial ratio (AR) is below 3 dB at the corresponding beam direction and gain is above 9.1 dBi over the operating band. It has potential applications in radar and wireless communication systems for simple structure, low-profile, with beam-scanning, narrow-band, and CP performance.
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Key words
Narrow-band, leaky-wave antenna (LWA), circularly polarized (CP), open stopband
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