Title :
Electronically switchable beam patterns using leaky-wave antenna
Author :
Chien-Jen Wang ; Jou, C.F. ; I-Yu Chen
Author_Institution :
Dept. of Electron. Eng., Southern Taiwan Univ. of Technol., Tainan, Taiwan
Abstract :
A beamforming technique for leaky-wave antennas (LWA) which can switch electronically in three different radiation patterns on the H plane has been developed. A simple two-terminal feeding microstrip-line LWA works as a radiating element. By varying the phase of the two injection signals from 0, 90 to 180 degrees, the emitting power from the LWA can produce three different radiation modes: the normal mode (one sharp beam), the difference mode (/spl Delta/) and the sum mode (/spl Sigma/). The antenna displays large-bandwidth characteristics and can be useful near crossroads for collision avoidance, or in the radiolocation of vehicles.
Keywords :
active antenna arrays; antenna feeds; antenna phased arrays; antenna radiation patterns; array signal processing; leaky wave antennas; microstrip antenna arrays; multibeam antennas; H plane; beamforming technique; collision avoidance; difference mode; electronically switchable beam patterns; large-bandwidth characteristics; leaky-wave antenna; microstrip line; normal mode; radiation patterns; radiolocation; sum mode; two-terminal feed; Antenna measurements; Antenna radiation patterns; Circuits; Collision avoidance; Communication switching; Displays; Feeds; Leaky wave antennas; Microstrip antennas; Switches;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2001. IEEE
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-7070-8
DOI :
10.1109/APS.2001.959581
