Title :
A novel type of waveguide polarizer with large cross-polar bandwidth
Author :
Lier, Erik ; Schaug-pettersen, Tor
Author_Institution :
Satellite Syst., ELAB, Trondheim, Norway
fDate :
11/1/1988 12:00:00 AM
Abstract :
A wideband quarter-wave polarizer is presented having a rectangular cross-section, where all four walls are loaded with a dielectric or artificial dielectric. A much larger bandwidth compared to existing polarizers can be obtained without increasing the insertion loss. A polarizer so constructed was fabricated and measured. The polarizer had a differential phase shift within 90°±0.7° corresponding to 44 dB isolation, insertion loss below 0.06 dB, and return loss below -24 dB (VSWR <1.13) over the frequency band 10.95 to 14.50 GHz
Keywords :
dielectric-loaded waveguides; electromagnetic wave polarisation; rectangular waveguides; waveguide components; -24 dB; 0.06 dB; 10.95 to 14.5 GHz; SHF; dielectric-loaded walls; differential phase shift; insertion loss; large cross-polar bandwidth; quarter-wave polarizer; rectangular cross-section; return loss; waveguide polarizer; wideband; Bandwidth; Cutoff frequency; Dielectric loss measurement; Dielectric measurements; Frequency measurement; Insertion loss; Polarization; Resonance; Satellites; Wideband;
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
