Reducing coupling coefficient variation using intended width mismatch

Patent metadata

Field	Value
Publication number	US-8928427-B2
Application number	US-201113194876-A
Country	US
Kind code	B2
Filing date	Jul 29, 2011
Priority date	Jul 29, 2010
Publication date	Jan 6, 2015
Grant date	Jan 6, 2015

Abstract

A coupler is presented that has high-directivity and low coupling coefficient variation. The coupler includes a first trace with a first edge substantially parallel to a second edge and substantially equal in length to the second edge. The first trace includes a third edge substantially parallel to a fourth edge. The fourth edge is divided into three segments. The outer segments are a first distance from the third edge. The middle segment is a second distance from the third edge. Further, the coupler includes a second trace, which includes a first edge substantially parallel to a second edge and substantially equal in length to the second edge. The second trace includes a third edge substantially parallel to a fourth edge. The fourth edge is divided into three segments. The outer segments are a first distance from the third edge. The middle segment is a second distance from the third edge.

First claim

What is claimed is:

1. A coupler, comprising:
a first trace including a first edge substantially parallel to a second edge, the first edge substantially equal in length to the second edge, and a third edge substantially parallel to a fourth edge, the fourth edge divided into three segments including a first, second, and third segment, the first and third segments located a first distance from the third edge and the second segment located between the first and third segment a second distance from the third edge; and
a second trace including a first edge substantially parallel to a second edge, the first edge substantially equal in length to the second edge, and a third edge substantially parallel to a fourth edge, the fourth edge divided into three segments including a first, second, and third segment, the first and third segments a first distance from the third edge and the second segment located between the first and third segment a second distance from the third edge, located the first distance and the second distance of the first trace and the first distance and the second distance of the second trace respectively selected to reduce coupling factor variation for a pre-determined coupling factor at a pre-determined set of frequencies, the coupling factor C pout calculated using the equation:

C
pout

=



S
21



⁢

(

1
-



Γ
L



2

)



S
31



⁢

(



1
+

(

S
21

⁢

S
32

S
31

-

S
22

)

⁢

Γ
L



)

;
and

the coupling factor variation Pk_dB calculated using the equation:

Pk_dB
=

20
⁢

log
10

⁢



1
+



(

S
21

⁢

S
32

S
31

-

S
22

)

⁢

Γ
L



1
-



(

S
21

⁢

S
32

S
31

-

S
22

)

⁢

Γ
L





.

the S ij referring to a scattering parameter of ports ij of the coupler and the Γ L referring to a normalized load impedance.

2. The coupler of claim

Assignees

• Li Yang
• Zhu Xuanang
• Hoang Dinhphuoc V
• Zhang Guohao
• Reisner Russ A
• Prikhodko Dimitri
• Guo Jiunn-Sheng
• Scoles Bradley D
• Viveiros Jr David
• Skyworks Solutions Inc

Inventors

• Li Yang
• Zhu Xuanang
• Hoang Dinhphuoc V
• Zhang Guohao
• Reisner Russ A
• Prikhodko Dimitri
• Guo Jiunn-Sheng
• Scoles Bradley D
• Viveiros Jr David

Classifications

• H01P5/185 Primary

  Edge coupled lines · CPC title

• H01P5/187

  Broadside coupled lines · CPC title

• H01P5/12

  Coupling devices having more than two ports (H01P5/04 takes precedence) · CPC title

• H01P5/08

  for linking dissimilar lines or devices (H01P1/16, H01P5/04 take precedence; linking lines of the same kind but with different dimensions H01P5/02) · CPC title

• Y10T29/49208

  by assembling plural parts · CPC title