Filter

Patent metadata

Field	Value
Publication number	US-10312564-B2
Application number	US-201715591212-A
Country	US
Kind code	B2
Filing date	May 10, 2017
Priority date	Apr 13, 2017
Publication date	Jun 4, 2019
Grant date	Jun 4, 2019

Abstract

A filter is disposed on a base board. The filter includes a first portion, a second portion, a ground portion, a first coupling portion and a second coupling portion. The first portion is disposed on a first layer in the base board to input signals. The second portion is disposed on the first layer to output signals. The ground portion is disposed on a second layer in the base board. The first coupling portion is disposed on the first layer. The first coupling portion is electrically coupled to the first portion and the second portion. The first coupling portion is electrically coupled to the ground portion through via holes. The second coupling portion is disposed on the first layer. The second coupling portion is electrically coupled to the first portion and the second portion. The second coupling portion is electrically coupled to the ground portion through the via holes.

First claim

What is claimed is:

1. A filter disposed on a base board, comprising:
a first portion disposed on a first layer in the base board, the first portion configured to input signals;
a second portion disposed on the first layer, the second portion configured to output signals;
a ground portion disposed on a second layer in the base board;
a first coupling portion comprising a first branch and a second branch, disposed on the first layer, wherein the first branch is electrically coupled to the first portion and the second portion, and the second branch is electrically coupled to the ground portion through via holes;
a second coupling portion comprising a third branch and a fourth branch, disposed on the first layer, wherein the third branch is electrically coupled to the first portion and the second portion, and the fourth branch is electrically coupled to the ground portion through other via holes; wherein
the via holes comprises:
a first via hole, wherein a wall of the first via hole is electrically coupled between a first end of the second branch and the ground portion;
a second via hole, wherein a wall of the second via hole is electrically coupled between a second end of the second branch and the ground portion;
a third via hole, wherein a wall of the third via hole is electrically coupled between a first end of the fourth branch and the ground portion; and
a fourth via hole, wherein a wall of the fourth via hole is electrically coupled between a second end of the fourth branch and the ground portion.

2. A filter disposed on a base board, comprising:
a first portion disposed on a first layer in the base board, the first portion configured to input signals;
a second portion disposed on the first layer, the second portion configured to output signals;
a ground portion disposed on a second layer in the base board;
a first coupling portion comprising a first branch and a second branch, disposed on the first layer, wherein the first branch is electrically coupled to the first portion and the second portion, and second branch is electrically coupled to the ground portion through via holes;
a second coupling portion comprising a third branch and a fourth branch, disposed on the first layer, wherein the third branch is electrically coupled to the first portion and the second portion, and the fourth branch is electrically coupled to the ground portion through other via holes; wherein
the first branch and the second branch are rectangles; the first branch and the second branch are parallel to each other, the third branch and the fourth branch are rectangles; the third branch and the fourth branch and the first branch are parallel to each other; and the via holes comprises:
a first via hole, wherein a wall of the first via hole is electrically coupled between a first end of the second branch and the ground portion;
a second via hole, wherein a wall of the second via hole is electrically coupled between a second end of the second branch and the ground portion;
a third via hole, wherein a wall of the third via hole is electrically coupled between a first end of the fourth branch and the ground portion; and
a fourth via hole, wherein a wall of the fourth via hole is electrically coupled between a second end of the fourth branch and the ground portion.

3. A filter disposed on a base board, comprising:
a first portion disposed on a first layer in the base board, the first portion configured to input signals;
a second portion disposed on the first layer, the second portion configured to output signals;
a ground portion disposed on a second layer in the base board;
a first coupling portion comprising a first branch and a second branch, disposed on the first layer, wherein the first branch and the second branch are rectangles, and the first branch and the second branch are parallel to each other; and one end of the first branch is electrically coupled to the first portion, the other end of the first branch is electrically coupled to the second portion, one end of the second branch and the other end of the second branch are electrically coupled to the ground portion through via holes; and
a second coupling portion disposed on the first layer wherein the second coupling portion is electrically coupled to the first portion and the second portion, the second coupling portion is electrically coupled to the ground portion through other via holes.

4. The filter of claim 3 , wherein the first branch and the second branch have a same length.

5. The filter of claim 3 , wherein the second coupling portion comprises a third branch and a fourth branch; the third branch and the fourth branch are rectangles; and the third branch and the fourth branch and the first branch are parallel to each other.

6. The filter of claim 5 , wherein the third branch, the fourth branch and the first branch have a same length.

7. The filter of claim 5 , wherein:
the first portion comprises a first square portion at a first end and a second square portion at a second end;
the second portion comprises a third square portion at a first end and a fourth square portion at a second end;
the first square portion comprises a first end, and a second end electrically coupled to the one end of the first branch through a first microstrip;
the second square portion comprises a first end, and a second end electrically coupled to a first end of the third branch through a second microstrip;
the third square portion comprises a first end, and a second end electrically coupled to the other end of the first branch through a third microstrip; and
the fourth square portion comprises a first end, and a second end electrically coupled to a second end of the third branch through a fourth microstrip;
wherein the first square portion, the second square portion, the third square portion and the fourth square portion are configured to have matching impedance.

8. The filter of claim 7 , wherein the first microstrip is electrically coupled between a midpoint of the second end of the first square portion and a midpoint of the one end of the first branch; the second microstrip is electrically coupled between a midpoint of the second end of the second square portion and a midpoint of the first end of the third branch; the third microstrip is electrically coupled between a midpoint of the second end of the third square portion and a midpoint of the other end of the first branch; and the fourth microstrip is electrically coupled between a midpoint of the second end of the fourth square portion and a midpoint of the second end of the third branch.

9. The filter of claim 5 , the via holes comprising:
a first via hole, wherein a wall of the first via hole is electrically coupled between the one end of the second branch and the ground portion;
a second via hole, wherein a wall of the second via hole is electrically coupled between the other end of the second branch and the ground portion;
a third via hole, wherein a wall of the third via hole is electrically coupled between a first end of the fourth branch and the ground portion; and
a fourth via hole, wherein a wall of the fourth via hole is electrically coupled between a second end of the fourth branch and the ground portion.

10. The filter of claim 9 , wherein in the first layer, a central point of the first via hole and a midpoint of the one end of the second branch overlap; a central point of the second via hole and a midpoint of the other end of the second branch overlap; a central point of the third via hole and a midpoint of the first end of the fourth branch overlap; and a central point of the fourth via hole and a midpoint of the second end of the fourth branch overlap.

11. The filter of

Assignees

• Ambit Microsystems Shanghai

Inventors

• Hsu Ming-Hsien
• Den Shii-Rong

Classifications

• H03H7/03

  comprising means for compensation of loss · CPC title

• H05K1/115

  Via connections; Lands around holes or via connections (H05K1/112 takes precedence) · CPC title

• H05K2201/0373

  Conductors having a fine structure, e.g. providing a plurality of contact points with a structured tool · CPC title

• H01P1/2013

  Coplanar line filters · CPC title

• H01P1/20372 Primary

  Hairpin resonators · CPC title