Very-low-sidelobe printed tapered arc-shaped wide-slot antenna array

• Published in: IET microwaves, antennas & propagation Vol. 5; no. 10; pp. 1143 - 1147
• Main Authors: BAYDERKHANI, R, HASSANI, H. R
• Format: Journal Article
• Language: English
• Published: Stevenage Institution of Engineering and Technology 14.07.2011; The Institution of Engineering & Technology
• Subjects: Antenna arrays; Antennas; Applied sciences; Bandwidth; Exact sciences and technology; Gain; Impedance; Noise levels; Radiocommunications; Reflectors; Sidelobes; Telecommunications; Telecommunications and information theory; Lateral lobe; Prototype; Slot antenna; Reflector; Printed antenna; Radiation pattern; Impedance; Antenna array; Slot antenna arrays; Gain
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/iet-map.2010.0331

This study proposes two unique techniques to increase the impedance bandwidth and reduce the sidelobe level (SLL) of printed antenna arrays. In the first, a printed tapered wide-slot antenna array fed by an array of printed patch elements placed above a metal reflector is introduced. The impedance bandwidth of this antenna array is 10.3-23.1 GHz, that is, 76.6%. By tapering the width of each of the slot elements, a very low SLL of 233.5 dB is obtained. The proposed antenna has a stable radiation pattern over the range 14.7-17 GHz, that is, the 3 dB gain bandwidth is 14.5% and has a front-to-back ratio (F/B) level of 40 dB and a low cross-polar component ,245 dB at broadside and ,235 dB off-broadside direction. A prototype of the antenna array is fabricated and the simulated and measured results are presented and discussed.