Title :
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
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;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2013.2296911
