Title :
An integrated coaxial circular-polarised OMJ/OMT for dual-band feed applications
Author_Institution :
Project Wedgetail, Boeing Australia Ltd., Australia
Abstract :
A novel integrated coaxial circularly-polarised OMJ/OMT (orthogonal-mode junction/orthogonal-mode transducer) structure is proposed for dual-band feed applications. The new structure is simple and compact with all the phasers, hybrids and power dividers built on the surface of the inner conductor. A section of coaxial waveguide engraved with these components performs all the functions of a large number of separate devices, such as polariser, OMJ, rectangular waveguide arms, power divider and OMT. Further, this structure is suitable for die-casting and could be used for mass production. The bridge ridge directional coupler used in the integrated CP OMJ/OMT is a new structure. It offers a new method for design of a directional coupler using a ridge waveguide at its common narrow wall.
Keywords :
antenna feeds; coaxial waveguides; dielectric-loaded antennas; directional couplers; electromagnetic wave polarisation; horn antennas; power dividers; ridge waveguides; waveguide junctions; waveguide transitions; bridge ridge directional coupler; coaxial waveguide; die-casting; dielectric-cone-loaded horn; dual-band feed; integrated coaxial circularly-polarised orthogonal-mode junction; integrated coaxial circularly-polarised orthogonal-mode transducer; phasers; polariser; power dividers; rectangular waveguide arms; ridged waveguide; Coaxial components; Conductors; Directional couplers; Dual band; Feeds; Polarization; Power dividers; Rectangular waveguides; Transducers; Waveguide components;
Conference_Titel :
Antennas and Propagation Society International Symposium, 2005 IEEE
Print_ISBN :
0-7803-8883-6
DOI :
10.1109/APS.2005.1551894
