Waveguide transition circuit

A radio frequency circuit comprising:

• a waveguide transmission line having a first port and a second port;
• a conductive wall disposed across the second port of the waveguide and having an aperture therethrough;
• a conductive pin having a first end and a second end;
• a first dielectric member disposed about a first portion of said conductive pin and disposed in the aperture of said conductive wall;
• a second dielectric member disposed about a second, different portion of said conductive pin and having a first surface disposed adjacent to a first surface of said first dielectric member;
• and
• a strip conductor disposed on a second surface of said second dielectric member and electrically coupled between said conductive pin and said waveguide transmission line.

A transducer for coupling radio frequency energy comprising:

• a section of waveguide having an inner cavity with a wall surface, the section of waveguide further having an end wall with a cylindrical void;
• a conductive pin having a first portion longitudinally disposed within the inner cavity of the section of waveguide and a second portion extending through the cylindrical void of the end wall;
• a first dielectric member extending within the cylindrical void of the end wall about a first portion of the conductive pin;
• a second dielectric member disposed within the inner cavity of the section of waveguide about a second portion of the conductive pin and disposed adjacent to the first dielectric member;
• a strip conductor disposed adjacent the second dielectric member and electrically connecting the conductive pin to the wall surface of the inner cavity of the section of waveguide.