High power dielectric resonator filter

A filter comprising:

• at least a first cavity and at least a first dielectric resonator and at least a first support for supporting said first resonator within said first cavity, said first cavity being formed of an electrically conductive sidewall and comprising an end wall connecting with said sidewall, said end wall being electrically conductive and thermally conductive;
• wherein said first support is disposed within said cavity between said resonator and said end wall, said support making thermal contact with a wall of said cavity and with a surface of said resonator, said support having a cylindrical shape including a cylindrical wall extending from said end wall, and said support being formed of a material which is electrically insulating and thermally conductive for extraction of heat from said resonator;
• said filter further comprises at least a first tuning screw mounted to said cavity sidewall and extending radially inward of said cavity sidewall, said first resonator has an end surface facing said cavity end wall, said first screw being located between said first resonator and said cavity end wall;
• and
• said first support has at least a first window in said cylindrical sidewall to permit passage of said screw via said window to a position spaced apart from the end surface of said first resonator to inhibit generation of an electric discharge arc.

A filter comprising:

• at least a first cavity and at least a first dielectric resonator and at least a first support for supporting said first resonator within said first cavity, said first cavity being formed of an electrically conductive sidewall and comprising an end wall connecting with said sidewall, said end wall being electrically conductive and thermally conductive;
• and
• wherein said first support is disposed within said cavity between said resonator and said end wall, said support making thermal contact with a wall of said cavity and with a surface of said resonator, said support having a cylindrical shape including a cylindrical wall extending from said end wall, and said support being formed of a material which is electrically insulating and thermally conductive for extraction of heat from said resonator;
• said filter further comprises a second cavity and a second dielectric resonator and a second support for supporting said second resonator within said second cavity, said second cavity being formed of an electrically conductive sidewall and comprising an end wall connecting with said sidewall, said end wall of said second cavity being electrically conductive and thermally conductive;
• said second support is disposed within said second cavity between said second resonator and said end wall of said second cavity, said second support making thermal contact with a wall of said second cavity and with a surface of said second resonator, said second support having a cylindrical shape including a cylindrical wall extending from said end wall of said second cavity, and said second support being formed of a material which is electrically insulating and thermally conductive for extraction of heat from said resonator;
• said filter comprises a further end wall disposed between said first cavity and said second cavity, and an iris disposed in said further end wall for coupling electromagnetic power between said first cavity and said second cavity;
• each of said supports has a circular cylindrical shape, and the outer surface of each of said resonators has a circular cylindrical shape;
• said first support is mounted to the end wall of said first cavity and said second support is mounted to the end wall of said second cavity;
• the filter further comprises at least a first tuning screw mounted to said first cavity sidewall and a second tuning screw mounted to said second cavity sidewall, said tuning screws extending radially inward of the sidewalls of the respective ones of said first and said second cavities, said first resonator having an end surface facing said first cavity end wall and said second resonator having an end surface facing said second cavity end wall, said first tuning screw being located between said first resonator and said first cavity end wall, said second tuning screw being located between said second resonator and said second cavity end wall;
• and
• wherein each of said supports has at least a first window in said cylindrical sidewall to permit passage of a respective one of said tuning screws via said window to a position spaced apart from the respective end surfaces of said resonators to inhibit generation of an electric discharge arc.