MATCHING AND PATTERN CONTROL FOR DUAL BAND CONCENTRIC ANTENNA FEED

摘要

PROBLEM TO BE SOLVED: To provide a dual band concentric antenna feed.SOLUTION: A dual band concentric antenna feed 10 includes an outer conductive tube 115 and an inner conductive tube 125. The inner conductive tube 125 is positioned inside the outer conductive tube 115 and is coaxially aligned to a shared axis. A coaxial waveguide 110 formed between an inner surface 116 of the outer conductive tube 115 and an outer surface 127 of the inner conductive tube 125 supports a first frequency band. A circular waveguide 120 formed within the inner conductive tube 125 supports a second frequency band. The dual band concentric antenna feed 10 also includes at least one transformer 161, a filter 150, and a plug 170 within the coaxial waveguide 110. The plug 170 is positioned near an output end 180 of the concentric antenna feed.