Accession Number : AD0671597

Title :   INVESTIGATIONS OF TE SUB 01 MODE CIRCULAR WAVEGUIDE TRANSDUCER AT MILLIMETER WAVELENGTHS.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ELECTRONICS COMMAND FORT MONMOUTH N J

Personal Author(s) : Moore,Leonard E.

Report Date : MAY 1968

Pagination or Media Count : 45

Abstract : Three different design approaches to achieve a broadband, low-loss, and well-matched TE sub 10 rectangular to TE sub 01 circular waveguide transducer for millimeter wavelengths were investigated. A model of each type was fabricated and tested. Construction details are given, and test results on each model are discussed. A design was achieved that provides a 20 percent bandwidth over the frequency range 31 to 38 GHz. Spurious unwanted modes are suppressed to give a mode purity in excess of 20 dB. Maximum VSWR values do not exceed 1.18. The insertion loss was found to be higher than desired; however, it is believed this could be reduced by the utilization of a one piece mandrel in the electroforming process. (Author)

Descriptors :   (*TRANSDUCERS, *WAVEGUIDES), MILLIMETER WAVES, BROADBAND, ATTENUATION, IMPEDANCE MATCHING, STANDING WAVE RATIOS, CYLINDRICAL BODIES, WAVEGUIDE COUPLERS, EXTREMELY HIGH FREQUENCY, MICROWAVE EQUIPMENT

Subject Categories : Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE