Dielectric waveguide filter with direct coupling and alternative cross-coupling

Patent metadata

Field	Value
Publication number	US-10050321-B2
Application number	US-201615152325-A
Country	US
Kind code	B2
Filing date	May 11, 2016
Priority date	Dec 3, 2011
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A waveguide filter for the transmission of an RF signal comprising a plurality of blocks of dielectric material coupled together in a combined side-by-side and stacked relationship. Each of the blocks defines resonators and includes an exterior surface that is covered with a layer of conductive material and defines internal layers of conductive material with the blocks coupled together. The internal layers of conductive material include regions devoid of conductive material that define internal windows for the transmission of the RF signal between resonators in the side-by-side and stacked blocks. The internal layers of conductive material also include regions devoid of conductive material that define isolated pads of conductive material for the indirect transmission of the RF signal between resonators in the stacked blocks.

First claim

I claim:

1. A waveguide filter for the transmission of an RF signal comprising:
a plurality of separate blocks of solid dielectric material with first and second ones of the plurality of separate blocks coupled together in a side-by-side relationship with respective exterior side surfaces thereof abutted against each other and with at least the first and a third one of the plurality of separate blocks abutted against each other in a stacked relationship with respective exterior top and bottom surfaces abutted against each other;
each of the plurality of separate blocks including one or more slots formed therein for defining a plurality of resonators in each of the blocks and the respective exterior top, bottom, and side surfaces thereof being covered with a layer of conductive material and defining internal layers of conductive material between the side-by-side and stacked plurality of blocks of dielectric material;
first regions in the internal layers of conductive material devoid of conductive material and defining first internal windows for a direct transmission of the RF signal between the plurality of resonators in the side-by-side and stacked plurality of separate blocks of dielectric material; and
second regions in the internal layers of conductive material devoid of conductive material and defining second internal means for an indirect transmission of the RF signal between the plurality of resonators in the stacked plurality of separate blocks of dielectric material.

2. A waveguide filter for the transmission of an RF signal comprising:
a plurality of separate blocks of solid dielectric material coupled together in a combined side-by-side and stacked relationship, at least first and second ones of the plurality of separate blocks are coupled in a side-by-side relationship with respective exterior side surfaces thereof abutted against each other and at least the first and a third one of the plurality of blocks are abutted against each other in a stacked relationship with respective exterior top and bottom surfaces abutted against each other, each of the exterior top, bottom, and side surfaces being covered with a layer of conductive material and defining a plurality of resonators;
each of the plurality of separate blocks including one or more slots formed in the solid dielectric material and defining the plurality of resonators in each of the blocks;
a first internal layer of conductive material defined between each of the side-by-side plurality of separate blocks of dielectric material by the layer of conductive material covering the exterior surface of each of the plurality of separate blocks of dielectric material;
a second internal layer of conductive material defined between each of the stacked plurality of blocks of dielectric material by the layer of conductive material covering the exterior surface of each of the plurality of blocks of dielectric material;
an RF signal input defined on the first one of the plurality of blocks of dielectric material;
an RF signal output defined on the second one of the plurality of blocks of dielectric material, the RF signal being transmitted through the plurality of resonators in the plurality of blocks of dielectric material between the RF signal input and the RF signal output;
internal direct RF signal transmission means defined in selected regions of the first and second internal layers of conductive material for a direct transmission of the RF signal between a resonator in one of the plurality of blocks of dielectric material and a resonator in another of the plurality of blocks of dielectric material; and
internal indirect RF signal transmission means defined in selected regions of the first internal layer of conductive material for an indirect transmission of the RF signal between a resonator in one of the plurality of blocks of dielectric material and a resonator in another of the plurality of separate blocks of dielectric material.

3. The waveguide filter of claim 2 wherein each of the RF signal input and output is defined by an RF signal transmission through-hole extending through respective first and second ones of the plurality of blocks of dielectric material, and the internal indirect RF signal transmission means is an isolated pad of conductive material in the interior layer of conductive material.

4. A waveguide filter for the transmission of an RF signal comprising:
a plurality of blocks of dielectric material coupled together in a combined side-by-side and stacked relationship, each of the plurality of blocks of dielectric material including an exterior surface covered with a layer of conductive material and defining a plurality of resonators;
a first internal layer of conductive material defined between each of the side-by-side plurality of blocks of dielectric material by the layer of conductive material covering the exterior surface of each of the plurality of blocks of dielectric material;
a second internal layer of conductive material defined between each of the stacked plurality of blocks of dielectric material by the layer of conductive material covering the exterior surface of each of the plurality of blocks of dielectric material;
an RF signal input defined on a first one of the plurality of blocks of dielectric material;
an RF signal output defined on a second one of the plurality of blocks of dielectric material, the RF signal being transmitted through the plurality of resonators in the plurality of blocks of dielectric material between the RF signal input and the RF signal output;
internal direct RF signal transmission means defined in selected regions of the first and second internal layers of conductive material for a direct transmission of the RF signal between a resonator in one of the plurality of blocks of dielectric material and a resonator in another of the plurality of blocks of dielectric material; and
internal indirect RF signal transmission means defined in selected regions of the first internal layer of conductive material for an indirect transmission of the RF signal between a resonator in one of the plurality of blocks of dielectric material and a resonator in another of the plurality of blocks of dielectric material,
the internal direct RF signal transmission means being defined by a window in the first and second internal layers of conductive material devoid of conductive material and the internal indirect RF signal transmission means is defined by an isolated pad of conductive material defined in the first internal layer of conductive material.

5. The waveguide filter of claim 4 wherein the plurality of blocks of dielectric material comprise first and second blocks of dielectric material coupled together in a side-by-side relationship and third and fourth blocks of dielectric material coupled together in a side-by-side relationship, the first and second blocks of dielectric material being coupled to the third and fourth blocks in a stacked relationship, the RF signal input and the RF signal output being defined in the first and second blocks of dielectric material respectively, the internal direct RF signal transmission means defined by a first interior window defined between the first and third blocks of dielectric material, a second interior window defined between the third and fourth blocks of dielectric material, and a third interior window defined between the fourth and second blocks of dielectric material, and the internal indirect RF signal transmission means is defined by a first internal isolated pad of conductive material between the first and third blocks of dielectric material and a second internal isolated pad of conductive material between the second and fourth blocks of dielectric material.

6. A waveguide filter for the transmission of an RF signal comprising:
a plurality of bloc

Assignees

• Cts Corp

Inventors

• Rogozine Alexandre
• Vangala Reddy

Classifications

• H01P1/2002 Primary

  Dielectric waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H01P1/207

  Hollow waveguide filters (H01P1/212, H01P1/213, H01P1/215, H01P1/219 take precedence) · CPC title

• H01P1/2088

  Integrated in a substrate · CPC title

• H01P7/10

  Dielectric resonators · CPC title

• H01P1/208

  Cascaded cavities; Cascaded resonators inside a hollow waveguide structure (H01P1/205 takes precedence) · CPC title