Abstract:
An RF filter assembly comprising a substrate, an RF waveguide filter mounted on the substrate and a pair of alignment/mounting/RF signal transmission pins extending from respective apertures in the substrate into respective through-holes in the RF filter. In one embodiment, the RF waveguide filter is comprised of first and second blocks of dielectric material coupled together in an abutting side-by-side relationship and the pair of through-holes are defined in the first and second blocks respectively. In one embodiment, respective RF signal transmission pads defined on the respective first and second blocks of dielectric material are abutted against respective RF signal transmission pads defined on the substrate and interconnected by an RF signal transmission line in the interior of the substrate for transmitting the RF signal between the first and second blocks of dielectric material.
Abstract:
A waveguide transition includes a ridge waveguide section with a first ridge part running along a first wall having a first distance to an opposing second wall. The waveguide transition comprises a partial H-plane waveguide section with an electrically conducting foil that comprises a longitudinally running foil slot ending a certain edge distance before a foil edge that faces the ridge waveguide section. The ridge waveguide section and the partial H-plane waveguide section overlap during a transition section that has a first end at a transition between the second wall and a third wall. There is a second distance between the first wall and the third wall that exceeds the first distance. The transition section has a second end where the first ridge part ends by a transversely running second ridge part that crosses the foil slot and connects to a third wall.
Abstract:
A highly compact bandpass filter that has excellent mechanical strength is disclosed. A bandpass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying between a first cross-section of the dielectric block and a second cross-section of the dielectric block substantially parallel to the first cross-section and second and third portions divided by the first portion and metal plates formed on surfaces of the dielectric block. The first portion of the dielectric block and the metal plates formed thereon are enabled to act as an evanescent waveguide. The second portion of the dielectric block and the metal plates formed thereon are enabled to act as a first resonator. The third portion of the dielectric block and the metal plates formed thereon are enabled to act as a second resonator. The metal plates include an inductive stub formed on the surface of the first portion of the dielectric block.
Abstract:
A highly compact band pass filter that has excellent mechanical strength is disclosed. A band pass filter according to the present invention employs a dielectric block of substantially rectangular prismatic shape constituted of a first portion lying between a first cross-section of the dielectric block and a second cross-section of the dielectric block substantially parallel to the first cross-section and second and third portions divided by the first portion and metal plates formed on surfaces of the dielectric block. The first portion of the dielectric block and the metal plates formed thereon are enabled to act as an evanescent waveguide. The second portion of the dielectric block and the metal plates formed thereon are enabled to act as a first resonator. The third portion of the dielectric block and the metal plates formed thereon are enabled to act as a second resonator. The metal plates include at least one exciting electrode formed on a first surface of the dielectric block which has the widest area. Thus a wide band characteristics can be obtained whereas the very thin dielectric block is used. Further, a high unloaded quality factor ( Q 0 ) can be obtained because the radiation loss is lowered when the thickness of the dielectric block is reduced.
Abstract:
Electromagnetic Filter, composed of at least one lossy mismatched electrical line element (or another lossy distributed wave propagating structure), having at one or both of its interfaces other distributed constant line structures or lumped components, chosen so as to introduce characteristic impedance discontinuities, characterized by:
a/ these interfaces represent lines with characteristic impedances different from the electrical line element, b/ these interfaces represent lumped components with impedances different from the electrical line element, c/ these interfaces represent mixed impedances a/ and b:
Abstract:
PURPOSE: A multiple mode resonance filter is provided to miniaturize the filter and reduce the manufacturing cost by offering a plurality of resonance frequencies of same mode in one resonator. CONSTITUTION: A housing(200) comprises a hollow inside. A dielectric resonance element(211) forms a plurality of resonance modes in respective directions. A first transmission line(207) is aligned in response to a first direction out of the plurality of resonance modes. A second transmission line(208) is arranged in response to a second direction out of the plurality of resonance modes.
Abstract:
A tunable bandpass filter (10) is used for filtering an electromagnetic signal, has a system passband (18) between a first and a second tunable cutoff frequencies, and has a first subfilter (12) and a second subfilter (14) connected to one another in series between an input port (11) and an output port (17) and being complementary to one another in the tunable bandpass filter (10). At least one of the first subfilter (12) and the secondsubfilter (14) is connected to operate in reflection.
Abstract:
Various multi-mode resonant filters including a housing having a cavity, are provided. The multi-mode resonant filters include a Dielectric Resonant (DR) element received in the cavity of the housing, and a plurality of transmission lines for connecting a point on one of a first axis, a second axis, and a third axis with a point on another axis. The first axis, the second axis, and the third axis are orthogonal to each other with respect to a center of the DR element.