# US 2014/0191822 A1 · Transmission line phase shifter

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- Number: US 2014/0191822 A1
- Document ID: US20140191822A1
- Status: Published application
- Kind: A1
- Application number: 13/738,140
- Filed: 2013-01-10
- Published: 2014-07-10
- Earliest claimed: 2013-01-10
- Assignees: Raytheon Company
- Applicants: Raytheon Company
- Inventors: Terry C. Cisco; Clinton O. Holter
- Web page: https://patentgrep.com/patent/US20140191822A1

## CPC

- H01P 1/183: {Coaxial phase-shifters (H01P1/181, H01P1/185, H01P1/19 take precedence)}
- H01P 1/18: Phase-shifters (H01P1/165 takes precedence)
- H01P 1/184: {Strip line phase-shifters (H01P1/181, H01P1/185, H01P1/19 take precedence)}
- H01P 5/028: {between strip lines}
- H01P 11/00: Apparatus or processes specially adapted for manufacturing waveguides or resonators, lines, or other devices of the waveguide type
- Y10T 29/49016: Antenna or wave energy "plumbing" making
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

Embodiments disclosed include transmission line phase shifters and methods for fabricating transmission line phase shifters that switch signal and ground conductors to reverse electromagnetic fields in a transmission line structure.

## Claims

### Claim 1

A transmission line phase shifter that switches signal and ground conductors to reverse electromagnetic fields in a transmission line structure, comprising:
a first grounded coplanar transmission line having a first end and a second end;
a first microstrip transmission line having a first end and a second end, wherein the first end of the first microstrip transmission line is coupled to the second end of the first grounded coplanar transmission line;
a twin lead line having a first end, a second end, a ground conductor and a signal conductor, wherein the first end of the twin lead line is coupled to the second end of the first microstrip transmission line;
a second microstrip transmission line having a first end and a second end, wherein the first end of the second microstrip transmission line is coupled to the second end of the twin lead line; and
a second grounded coplanar transmission line having a first end and a second end, wherein the first end of the second grounded coplanar transmission line is coupled to the second end of the second microstrip transmission line.

### Claim 2 (depends on 1)

The transmission line phase shifter of claim 1, wherein the first and second grounded coplanar transmission lines, the first and second microstrip transmission lines, and the twin lead line are integrated into an integrated circuit device.

### Claim 3 (depends on 2)

The transmission line phase shifter of claim 2, comprising switching transistors integrated into the integrated circuit device to select between a reference arm and phase delay arm of the transmission line phase shifter.

### Claim 4 (depends on 3)

The transmission line phase shifter of claim 3, wherein integrating switching transistors into the integrated circuit device reduces parasitic effects associated with the transmission line phase shifter.

### Claim 5 (depends on 1)

The transmission line phase shifter of claim 1, wherein the grounded coplanar transmission lines, microstrip transmission line, and twin lead line are created using a monolithic microwave integrated circuit (MMIC) structure.

### Claim 6

A method for fabricating a transmission line phase shifter that switches signal and ground conductors to reverse electromagnetic fields in a transmission line structure, comprising:
coupling an end of a first grounded coplanar transmission line to a first end of a first microstrip transmission line;
coupling a first end of a twin lead line to a second end of the first microstrip transmission line, wherein the twin lead line includes a second end, a ground conductor and a signal conductor;
coupling a first end of a second microstrip transmission line to the second end of the twin lead line; and
coupling a first end of a second grounded coplanar transmission line to the second end of the second microstrip transmission line.

### Claim 7 (depends on 6)

The method of claim 6, comprising integrating the first and second grounded coplanar transmission lines, the first and second microstrip transmission lines, and the twin lead line into an integrated circuit device.

### Claim 8 (depends on 7)

The method of claim 7, comprising integrating switching transistors into the integrated circuit device to select between a reference arm and phase delay arm of the transmission line phase shifter.

### Claim 9 (depends on 8)

The method of claim 8, wherein integrating switching transistors into the integrated circuit device reduces parasitic effects associated with the transmission line phase shifter.

### Claim 10 (depends on 6)

The method of claim 6, comprising fabricating the grounded coplanar transmission lines, microstrip transmission line, and twin lead line using a monolithic microwave integrated circuit (MMIC) structure.