Title :
Compact broadband TE01-mode generator
Author_Institution :
Norwegian Inst. of Technol., Trondheim, Norway
fDate :
10/1/1993 12:00:00 AM
Abstract :
A compact broadband TE01-mode generator is presented. It consists of five identical sectorial waveguides which are stepped into an ordinary circular waveguide. These sectorial waveguides are fed by five identical probes at the end of a star-shaped feed line with five arms. This feed line is placed in a trace between the sectorial waveguides. A consequence of the five-fold symmetry is that the lowest parasitic mode which can be generated and propagated has a cutoff far above the frequency range of operation (9.5-10.5 GHz). The measurements show that the return loss is less than -15 dB in the frequency range of operation. The mode purity is better than 99.4%
Keywords :
circular waveguides; waveguide components; 9.5 to 10.5 GHz; circular waveguide; compact broadband TE01-mode generator; five-fold symmetry; lowest parasitic mode; mode purity; return loss; sectorial waveguides; star-shaped feed line;
Journal_Title :
Microwaves, Antennas and Propagation, IEE Proceedings H
