H - Electricity – 01 – P
Patent
H - Electricity
01
P
H01P 1/20 (2006.01) H01P 1/208 (2006.01)
Patent
CA 2134381
A high Q microwave filter. Coupling bar structures are included in a cylindrical resonator, extending substan- tially the entire length of the resonator for coupling orthogonal modes. The coupling bars have a lower profile than conventional tuning screws. The symmetry of the filter structure is improved over the prior art coupling devices which relied entirely on tuning screws for coupling E fields of one mode to the other mode. The coupling bar structure has a lower profile penetrating less into the supported E fields while obtaining the desired coupling. Increased bandwidth may be obtained at improved symmetries over the prior art devices. Fine tuning may be provided by inserting tuning screws into the cylindrical cavity. The tuning screws require less penetration as substantially most of the coupling occurs by virtue of the coupling bars.
Hughes Aircraft Company
Sim & Mcburney
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