Patent ID: 6222432
Filing Date: 2001-04-24
Classification: H01P

Abstract:
A quarter-wave coaxial cavity resonator having a cavity comprising a cylindrical wall portion (1), a bottom wall (3) and a top wall (4) joining the cylindrical wall at right angles, a cylindrical resonator rod (5) arranged in the cavity and having a first end (6) fixed to and protruding from said bottom wall and a second end (7) at a distance from said top wall, and means (8) for feeding microwave energy to said resonator,wherein said means for feeding microwave energy comprise an antenna formed as a T having a stem portion (9) having a first end and a second end, and an arm portion, the arm portion having a first arm end (10) and a second arm end (11), the first end of the stem (9) being electrically and mechanically joined to the arm portion substantially in the middle between its first and second arm ends (10, 11),said arm portion having substantially the same length as said resonator rod (5) and being spaced a proximate distance from and substantially parallel thereto,said first arm end (10) of the arm portion being mechanically fixed and electrically connected to said bottom wall (3) in proximity to said first end (6) of the resonator rod (5), and said second arm end (11) of the arm portion being free,the second stem end being led outward to the cylindrical wall portion (1) substantially perpendicularly thereto and joined to a feeder (12).