Title :
A compact full waveguide band turnstile junction orthomode transducer
Author :
Srikanth, Sivasankaran ; Solatka, Michael
Author_Institution :
Nat. Radio Astron. Obs., Charlottesville, VA, USA
Abstract :
This paper describes the development, construction, and measurement of a full waveguide band (8-12 GHz) orthomode transducer (OMT). The design uses a turnstile junction at the input, two 90° H-plane bends in each of four waveguide arms, and two E-plane Y-junctions. The outputs are in WR90 waveguides. Measured return loss is better than 19 dB and cross polarization lower than -50 dB in the 7.8-12.2 GHz range. Three large aluminum blocks form the main body of the OMT. The device has a diameter of 8.0”, height of 2.7”, and weighs 2.5 lbs.
Keywords :
microwave detectors; microwave measurement; waveguides; E-plane Y-junctions; OMT; WR90 waveguides; compact full waveguide band turnstile junction orthomode transducer; cross polarization; frequency 7.8 GHz to 12.2 GHz; size 2.7 in; size 8 in; waveguide arms; Electromagnetic waveguides; Insertion loss; Junctions; Loss measurement; Reflection; Transducers; Tuning;
Conference_Titel :
General Assembly and Scientific Symposium, 2011 XXXth URSI
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-5117-3
DOI :
10.1109/URSIGASS.2011.6051292
