Wideband Offset Slot-Coupled Patch Antenna Array for X/Ku-Band Multimode Radars

Author

Bilgic, Mustafa Murat ; Yegin, Korkut

Author_Institution

Dept. of Biomed. Eng., Yeditepe Univ., Istanbul, Turkey

Volume

13

fYear

2014

fDate

2014

Firstpage

157

Lastpage

160

Abstract

A high-gain, wideband antenna element that covers most portions of X- and Ku-bands is essential for multimode radar applications. This letter presents an aperture-coupled stacked patch antenna for 8.75-12.25-GHz frequency band. Fixed beam tilt up to 30 ° in scan range can be obtained by offsetting the aperture relative to a driven patch. When there is no offset, a single antenna has broadside gain greater than 10 dBi. An antenna array (4 × 4) with fixed beam tilt is designed and validated with measurements. The prototype antenna exhibits 44% fractional bandwidth and maximum gain 20.6 dBi in the target frequency band.

Keywords

broadband antennas; microstrip antenna arrays; radar antennas; slot antenna arrays; X-Ku-band multimode radars; aperture-coupled stacked antenna; fixed beam tilt; frequency 8.75 GHz to 12.25 GHz; wideband offset slot-coupled patch antenna array; Antenna arrays; Antenna measurements; Arrays; Broadband antennas; Gain; Radar antennas; Aperture coupling; Ku-band; X-band; microstrip antenna; radar;

fLanguage

English

Journal_Title

Antennas and Wireless Propagation Letters, IEEE

Publisher

ieee

ISSN

1536-1225

Type

jour

DOI

10.1109/LAWP.2013.2296911

Filename

6708446