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A Compact Conformal Stub-Loaded Long Slot Leaky-Wave Antenna With Wide Beamwidth
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DOI：10.1109/LAWP.2021.3067952.png)
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Abstract
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This letter presents a compact, conformal, stub-loaded longitudinal slot leaky-wave antenna at Ku-band. The antenna is designed with a short length of 2.75 lambda at the center frequency. The effect of flange length on the transverse plane half-power beamwidth (HPBW) is studied. The design of leaky-wave antenna within this short length and flange studies on transverse plane HPBW are the novelty of this letter. Antenna design, dispersion curves, and a comparison of the simulation and measurement results are presented. The radiation efficiency of 95%, a gain of 8 dBi, a tilt angle of 30 degrees, and longitudinal plane HPBW of 42 degrees are achieved. Transverse plane HPBW of 168 degrees and 4 dB beamwidth of 180 degrees are achieved, which aids to achieve an omnidirectional pattern using two antennas when placed in the cylindrical shell with a 180 degrees angular separation.
Keywords:
Antennas
Flanges
Slot antennas
Radomes
Antenna radiation patterns
Leaky wave antennas
Resonant frequency
Leaky-wave antenna (LWA)
longitudinal slot
tilted beam
traveling wave antennas
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