Study of backfire antennas

A study of backfire microstrip antenna as a primary radiator

“…The supporting structure disturbs the radiation from the reflectors depending on its size, resulting in efficiency reduction. Backfire antennas which are self-supporting stricture have been proposed to resolve this problem [4,5,6,7,8]. According to [4], backfire antennas are a modified version of ordinary endfire antennas proposed by H. W. Ehrenspeck in 1960 [5,6].…”

“…Backfire antennas which are self-supporting stricture have been proposed to resolve this problem [4,5,6,7,8]. According to [4], backfire antennas are a modified version of ordinary endfire antennas proposed by H. W. Ehrenspeck in 1960 [5,6]. The circular waveguide with dielectric cap [7] or corrugated hat [8] have been proposed as backfire antenna of primary radiator.…”

Bandwidth Enhancement of a Backfire Microstrip Patch Antenna for Pervasive Communication

“…Many types of antenna have been designed to cater for variable application and to be suitable for their needs. The backfire antenna was initially described in 1960 by H. W. Ehernspeck and much simplified version, called the short backfire antenna, has been subjected to extensive experimental studies [1]. The short back fire antenna consists of large reflector 2 in diameter with a rim of height 0.25 and a small reflector 0.4 in diameter separated by approximately 0.5 .…”

“…Thus, the radiation of the antenna is directed in inverse direction in comparison with the radiation of the ordinary endfire antenna used as a backfire antenna prototype. Because of this reason it is called backfire antenna [1].…”