Surface mountable microwave filter configuration and method of fabricating same
AssigneeM/A-Com, Inc.
InventorsNoyan Kinayman, Eswarappa Channabasappa, Allan Buckle, Nitin Jain
Life of this patent
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Abstract
A surface-mountable millimeter-wave waveguide filter is constructed using irises in a rectangular waveguide formed in a dielectric material such as glass. The filter structure is surface-mountable, has a single dielectric layer, and can be manufactured using a suitable monolithic microwave integrated circuit (MMIC) process. The filter has potential applications in millimeter-wave systems such as Local Multipoint Distribution System (LMDS) and Autonomous Cruise Control (ACC) radar for automobiles.
Claims20
A filter, comprising:
- a dielectric substrate having a major surface including first and second microstrips at first and second ends of the major surface, respectively,
- first and second microstrip-to-waveguide mode converters on the major surface, the first and second mode converters connected to the first and second microstrips, respectively;
- a waveguide integrally formed from a portion of the major surface between the first and second mode converters;
- and
- a plurality of irises projecting from the major surface.
A printed circuit board assembly, comprising:
- a circuit board substrate having a plurality of printed wirings thereon;
- and
- a filter mounted on the circuit board substrate, comprising:
- a dielectric substrate having a major surface including first and second microstrips at first and second ends of the major surface, respectively,
- first and second microstrip-to-waveguide mode converters on the major surface, the first and second mode converters connected to the first and second microstrips, respectively;
- a waveguide integrally formed from a portion of the major surface between the first and second mode converters;
- and
- a plurality of irises projecting from the major surface.
A method for fabricating a filter, comprising:
- (a) forming first and second microstrips and first and second microstrip-to-waveguide mode converters at respective first and second ends of a major surface of a dielectric substrate,
- (b) forming side walls that define a waveguide on the major surface between the first and second mode converters;
- and
- (c) forming a plurality of irises projecting from the major surface between the first and second mode converters.
Dependencies are inferred from the claim text.