Patent ID: 9343790
Filing Date: 2016-05-17
CPC Classification: H01P

Claim Text:
1. A radio-frequency/microwave multi-conductor combline resonant structure comprising: a. a metallic enclosure having a base, a top, a set of walls, said walls having an enclosure height, and an inlet port and an outlet port installed on said enclosure walls; b. a metallic post having a proximal end, a distal end and a variable post height, said post height being the distance between the distal and the proximal ends, and wherein the proximal end of said post being attached to the base of the enclosure, and the distal end of the post being free; c. a metallic intermediate shell surrounding said post and placed in between the post and the enclosure walls forming an inner field confinement region between the post and the shell and an outer field confinement region between the shell and the enclosure walls, said shell having a top, a bottom, a shell thickness, shell walls, and a shell height, wherein said shell height being smaller than said enclosure height, and the bottom of the shell being connected to said base; and d. said inner and outer field confinement regions sized to provide two resonant modes being non-synchronous to realize dual-band filters or synchronous to realize dual-mode filters having different operations, and wherein the electromagnetic field pattern inside the resonator is dependent on the relative heights of the inner post and the intermediate shell, as well as the size and shape of the inner and outer field confinement regions.