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http://dx.doi.org/10.7471/ikeee.2020.24.2.536

Design of a Nature-inspired Wideband Sprout-leaf Antenna  

Woo, Dongsik (Dept. of Aviation Information & Communications Engineering, Kyungwoon University)
Bae, Sunghyun (Dept. of Aviation Information & Communications Engineering, Kyungwoon University)
Publication Information
Journal of IKEEE / v.24, no.2, 2020 , pp. 536-542 More about this Journal
Abstract
This paper presents a nature-inspired wideband sprout-leaf shaped antenna with end-fire radiation pattern. A sprout-leaf shape angled-radiator was designed for wide beamwidth radiation patterns for motion detection sensors. An extended and truncated ground plane was used as a reflector for end-fire radiation patterns. To feed the balanced radiator, a broadband microstrip (MS) to coplanar stripline (CPS) balun was utilized with excellent amplitude and phase balance. The proposed antenna demonstrates wide frequency bandwidth from 8.5 to 14.5 GHz with wide beamwidth and the radiation efficiency of 90%. The measured gain is from 4 to 5 dBi and front-to-back ratio was 10 to 20 dB. It has been shown that the proposed antenna can be used for imaging sensors, phased array systems, and radars that require a wide bandwidth and a directional radiation pattern.
Keywords
nature-inspired; sprout-leaf; wideband antenna; coplanar stripline; balun;
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