Flight Test Evaluation of a 240to 400MHz Cavity-Backed Cross Open-Sleeve Dipole Antenna.

摘要

The gain and radiation patterns of a cavity-backed open-sleeve cross dipole antenna mounted on a C135-type aircraft were measured bia a satellite-to-aircraft link at 249.1 MHz. The antenna was designed for operation over the 240 to 400 MHz frequency band and has maximum dimensions of 21.5 in. square by 6 in. deep. For the purposes of the aircraft flight tests, the antenna was externally mounted to the fuselage and covered with a radome. The gain and radiation patterns of the antenna measured in the antenna range with the cavity mounted on a 9.5-ft by 9.5-ft cylindrically curved ground plane are also shown for comparison.