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:
The present invention provides a method for implementing a TM dielectric resonator, and the method includes: a dielectric resonant column component with a metal connecting plate is machined; a metal cavity with an opening at one end is machined; the metal connection plate of the dielectric resonant column component is fastened to the inner wall of the metal cavity by a screw; the opening of the metal cavity is covered with a prefabricated cover plate; and a prefabricated tuning screw is screwed from the cover plate into the metal cavity. According to the method for implementing the TM dielectric resonator, the machining process is simple, and the machined TM dielectric resonator is small in volume, excellent in performance and high in operational reliability. An embodiment of the present invention further provides a TM dielectric resonator machined by the method above and a dielectric filter formed by one or more TM dielectric resonators.
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.
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:
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 the 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 a capacitive stub formed on a first surface of the dielectric block which is substantially perpendicular to the cross-sections.
Abstract:
A high frequency electrode (1) includes a main conductor (20) and at least two sub-conductors (21-23) formed along a side of the main conductor (20). The sub-conductors (21-23) are formed so that a sub-conductor thereof positioned nearer to the outside has a smaller width.