Title :
A flat four-beam compact phased array antenna
Author :
Krairiksh, Monai ; Ngamjanyaporn, Phaisan ; Kessuwan, Chaiwat
Author_Institution :
Dept. of Telecommun. Eng., King Mongkut´´s Inst. of Technol., Bangkok, Thailand
fDate :
5/1/2002 12:00:00 AM
Abstract :
This paper presents a flat four-beam compact phased array antenna. The low-cost and compact phased array antenna is designed using a circular array of four circular microstrip antennas made of low-cost material and four 1-bit phase shifters. The main beam of the antenna can be switched in four directions with the gain of about 4 dBi in each main-beam direction. More than 90/spl deg/ half-power beamwidth and over 10 dB F/B ratio are obtained. In addition, the diversity performance is considered and the diversity performance of this antenna can be provided with the envelope correlation about 0.6.
Keywords :
UHF antennas; antenna phased arrays; antenna radiation patterns; microstrip antenna arrays; multibeam antennas; 1.8 GHz; circular array; circular microstrip antennas; compact phased array antenna; diversity performance; flat four-beam phased array; low-cost antenna; low-cost material; phase shifters; switched-beam array antenna; Adaptive arrays; Antenna arrays; Directional antennas; Directive antennas; Microstrip antenna arrays; Microstrip antennas; Phase shifters; Phased arrays; Prototypes; Switches;
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/7260.1000197
