CN112564665B

CN112564665B - Low-loss digital phase shifter

Info

Publication number: CN112564665B
Application number: CN202011491184.8A
Authority: CN
Inventors: 龚云峰
Original assignee: Beijing Institute of Radio Measurement
Current assignee: Beijing Institute of Radio Measurement
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2022-08-09
Anticipated expiration: 2040-12-17
Also published as: CN112564665A

Abstract

One embodiment of the present application discloses a low-loss digital phase shifter, comprising: the phase shifter comprises an input unit, a 180-degree phase shift unit, a 90-degree phase shift unit, a 45-degree phase shift unit, a 22.5-degree phase shift unit and an output unit, wherein the phase shift units are connected in series, and the cascade sequence is as follows: a 180 degree phase shift unit, a 90 degree phase shift unit, a 45 degree phase shift unit and a 22.5 degree phase shift unit. The application provides a low-loss digital phase shifter has effectively reduced transmission loss, has improved isolation and power capacity between the branch road, moves the looks ware and can realize high accuracy in whole operating frequency range and move the looks, fine solution traditional digital phase shifter problem that the loss is high, have very high reliability, can be used to engineering practice.

Description

Low-loss digital phase shifter

Technical Field

The present application relates to the field of digital phase shifters. And more particularly to a low loss digital phase shifter.

Background

The microwave phase shifter is a microwave control circuit, and mainly functions to control the phase of a microwave signal to meet the needs of a system. The phase shifter has very wide application prospect in the fields of phased array radar, microwave communication, satellite technology and the like. Particularly, in a phased array radar system, a digital phase shifter is a key device of a T/R module, the whole radar phase shifter realizes the scanning of a beam in the air, and the indexes of the phase shifter, such as loss, power capacity, phase shifting precision, response speed and the like, directly influence the accuracy of the positioning of the system beam in the air and the suppression degree of a beam main lobe on a side lobe.

The traditional digital phase shifter realizes the closing of a feed circuit, and each phase shifting unit needs to be added with a bias inductor and a blocking capacitor on a transmission path, thereby causing the increase of loss and the deterioration of electrical performance indexes.

Disclosure of Invention

In view of the above, the present application provides a low loss digital phase shifter, comprising:

the phase shifter comprises an input unit, a 180-degree phase shift unit, a 90-degree phase shift unit, a 45-degree phase shift unit, a 22.5-degree phase shift unit and an output unit, wherein the phase shift units are connected in series, and the cascade sequence is as follows: a 180 degree phase shift unit, a 90 degree phase shift unit, a 45 degree phase shift unit and a 22.5 degree phase shift unit.

In a specific embodiment, the input unit comprises an input terminal, an input unit first microstrip line, an input unit first capacitor, an input unit second microstrip line, an input unit first inductor, and an input unit second capacitor, wherein,

the input end is connected with the first end of the first microstrip line of the input unit, the second end of the first microstrip line of the input unit is connected with the first end of the first capacitor of the input unit, the second end of the first capacitor of the input unit is connected with the first end of the second microstrip line of the input unit, the first end of the first inductor of the input unit is connected with the second end of the first capacitor of the input unit, the second end of the first inductor of the input unit is externally connected with a first voltage, the first end of the second capacitor of the input unit is connected with the second end of the first inductor of the input unit, the second end of the second capacitor of the input unit is grounded, the second end of the second microstrip line of the input unit is connected with the 180-degree phase shifting unit, and the first voltage is 3.3V.

In one embodiment, the 180 ° phase shift unit comprises:

a first driver, a first resistor of a 180-degree phase shift unit, a second resistor of a 180-degree phase shift unit, a first capacitor of a 180-degree phase shift unit, a second capacitor of a 180-degree phase shift unit, a third capacitor of a 180-degree phase shift unit, a fourth capacitor of a 180-degree phase shift unit, a fifth capacitor of a 180-degree phase shift unit, a sixth capacitor of a 180-degree phase shift unit, a seventh capacitor of a 180-degree phase shift unit, an eighth capacitor of a 180-degree phase shift unit, a first inductor of a 180-degree phase shift unit, a second inductor of a 180-degree phase shift unit, a third inductor of a 180-degree phase shift unit, a fourth inductor of a 180-degree phase shift unit, a first switch element of a 180-degree phase shift unit, a second microstrip of a 180-degree phase shift unit, a third microstrip of a 180-degree phase shift unit, a fourth microstrip of a 180-degree phase shift unit, a fourth microstrip of a phase shift unit, a phase shift unit, a phase, A fifth microstrip line of the 180-degree phase shift unit, a sixth microstrip line of the 180-degree phase shift unit, a seventh microstrip line of the 180-degree phase shift unit, an eighth microstrip line of the 180-degree phase shift unit, and a ninth microstrip line of the 180-degree phase shift unit;

the 180-degree phase shifting unit ground state branch circuit consists of a first microstrip line of the 180-degree phase shifting unit, a second microstrip line of the 180-degree phase shifting unit, a third microstrip line of the 180-degree phase shifting unit, a fourth microstrip line of the 180-degree phase shifting unit and a fifth microstrip line of the 180-degree phase shifting unit; the sixth microstrip line of the 180-degree phase shift unit, the seventh microstrip line of the 180-degree phase shift unit and the eighth microstrip line of the 180-degree phase shift unit form a 180-degree phase shift unit phase shift branch, wherein,

the first end of the first microstrip line of the 180-degree phase shift unit is connected with the first end of the sixth microstrip line of the 180-degree phase shift unit, the first end of the first microstrip line of the 180-degree phase shift unit is connected with the input unit, the second end of the first microstrip line of the 180-degree phase shift unit is connected with the first end of the third microstrip line of the 180-degree phase shift unit, the first end of the second microstrip line of the 180-degree phase shift unit is connected with the first end of the third microstrip line of the 180-degree phase shift unit, the second end of the third microstrip line of the 180-degree phase shift unit is connected with the first end of the fifth microstrip line of the 180-degree phase shift unit, the first end of the fourth microstrip line of the 180-degree phase shift unit is connected with the first end of the fifth microstrip line of the 180-degree phase shift unit, the second end of the eighth microstrip line of the 180-degree phase shift unit is connected with the first end of the seventh microstrip line of the 180-degree phase shift unit, the second end of the seventh microstrip line of the 180-degree phase shift unit is connected with the second end of the sixth microstrip line of the 180-degree phase shift unit;

a first end of the first switch element of the 180 ° phase shift unit is connected to a second end of the first microstrip line of the 180 ° phase shift unit, a second end of the first switch element of the 180 ° phase shift unit is connected to a first end of the fifth capacitor of the 180 ° phase shift unit, a second end of the fifth capacitor of the 180 ° phase shift unit is grounded, a first end of the first inductor of the 180 ° phase shift unit is connected to a first end of the fifth capacitor of the 180 ° phase shift unit, a second end of the first inductor of the 180 ° phase shift unit is connected to a first end of the first capacitor of the 180 ° phase shift unit, and a second end of the first capacitor of the 180 ° phase shift unit is grounded;

a first end of the second switch element of the 180 ° phase shift unit is connected to a first end of the fifth microstrip line of the 180 ° phase shift unit, a second end of the first switch element of the 180 ° phase shift unit is connected to a first end of the sixth capacitor of the 180 ° phase shift unit, a second end of the sixth capacitor of the 180 ° phase shift unit is grounded, a first end of the second inductor of the 180 ° phase shift unit is connected to a first end of the sixth capacitor of the 180 ° phase shift unit, a second end of the second inductor of the 180 ° phase shift unit is connected to a first end of the second capacitor of the 180 ° phase shift unit, a second end of the second capacitor of the 180 ° phase shift unit is grounded, and a first end of the second capacitor of the 180 ° phase shift unit is connected to a first end of the first capacitor of the 180 ° phase shift unit;

a first end of the third switch element of the 180 ° phase shift unit is connected to a second end of the sixth microstrip line of the 180 ° phase shift unit, a second end of the third switch element of the 180 ° phase shift unit is connected to a first end of the seventh capacitor of the 180 ° phase shift unit, a second end of the seventh capacitor of the 180 ° phase shift unit is grounded, a first end of the second inductor of the 180 ° phase shift unit is connected to a first end of the seventh capacitor of the 180 ° phase shift unit, a second end of the second inductor of the 180 ° phase shift unit is connected to a first end of the third capacitor of the 180 ° phase shift unit, and a second end of the third capacitor of the 180 ° phase shift unit is grounded;

a first end of a fourth switching element of the 180 ° phase shift unit is connected to a second end of an eighth microstrip line of the 180 ° phase shift unit, a second end of the fourth switching element of the 180 ° phase shift unit is connected to a first end of an eighth capacitor of the 180 ° phase shift unit, a second end of an eighth capacitor of the 180 ° phase shift unit is grounded, a first end of a second inductor of the 180 ° phase shift unit is connected to a first end of an eighth capacitor of the 180 ° phase shift unit, a second end of a second inductor of the 180 ° phase shift unit is connected to a first end of a fourth capacitor of the 180 ° phase shift unit, a second end of a fourth capacitor of the 180 ° phase shift unit is grounded, and a first end of a fourth capacitor of the 180 ° phase shift unit is connected to a first end of a third capacitor of the 180 ° phase shift unit;

the first driver includes a first driver first port, a first driver second port, a first driver third port, a first driver fourth port, a first driver fifth port, and a first driver sixth port, wherein,

the first port of the first driver is connected with the first end of a second resistor of the 180-degree phase shifting unit, and the second end of the second resistor of the 180-degree phase shifting unit is connected with the first end of a first capacitor of the 180-degree phase shifting unit;

the second port of the first driver is connected with the first end of a first resistor of the 180-degree phase shifting unit, and the second end of the first resistor of the 180-degree phase shifting unit is connected with the first end of a third capacitor of the 180-degree phase shifting unit;

the third port of the first driver is externally connected with a 180-degree control signal

The fourth port of the first driver is grounded;

a fifth port of the first driver is externally connected with a first voltage;

a sixth port of the first driver is externally connected with a second voltage;

the first end of the ninth microstrip line of the 180-degree phase shift unit is connected with the second end of the fifth microstrip line of the 180-degree phase shift unit, and the second end of the ninth microstrip line of the 180-degree phase shift unit is connected with the 90-degree phase shift unit.

In one embodiment, the 90 ° phase shift unit includes:

a second driver, a first resistor of a 90-degree phase shift unit, a second resistor of a 90-degree phase shift unit, a first capacitor of the 90-degree phase shift unit, a second capacitor of the 90-degree phase shift unit, a third capacitor of the 90-degree phase shift unit, a fourth capacitor of the 90-degree phase shift unit, a fifth capacitor of the 90-degree phase shift unit, a sixth capacitor of the 90-degree phase shift unit, a seventh capacitor of the 90-degree phase shift unit, an eighth capacitor of the 90-degree phase shift unit, a first inductor of the 90-degree phase shift unit, a second inductor of the 90-degree phase shift unit, a third inductor of the 90-degree phase shift unit, a fourth inductor of the 90-degree phase shift unit, a first microstrip line of the 90-degree phase shift unit, a second microstrip line of the 90-degree phase shift unit, a third microstrip line of the 90-degree phase shift unit, a fourth microstrip line of the 90-degree phase shift unit, a third microstrip line of the 90-degree phase shift unit, a fourth microstrip line of the 90-degree phase shift unit, a fourth switch element, a third microstrip line of the 90-degree phase shift unit, a fourth microstrip line of the 90-shift unit, a third microstrip line of the 90-degree phase shift unit, a fourth microstrip line of the 90-shift unit, a third microstrip line of the 90-degree phase shift unit, a third microstrip line of the 90-shift unit, a fourth microstrip line of the 90-shift unit, a third microstrip line of the 90-shift unit, a fourth microstrip line of the 90-angle, a third microstrip line of the 90-angle shift unit, a third microstrip line of the 90-angle unit, a third microstrip line of the 90-angle, a third, A fifth microstrip line of a 90-degree phase shift unit, a sixth microstrip line of a 90-degree phase shift unit, a seventh microstrip line of a 90-degree phase shift unit, an eighth microstrip line of a 90-degree phase shift unit, and a ninth microstrip line of a 90-degree phase shift unit,

the 90-degree phase shifting unit ground state branch circuit is formed by the 90-degree phase shifting unit first microstrip line, the 90-degree phase shifting unit second microstrip line, the 90-degree phase shifting unit third microstrip line, the 90-degree phase shifting unit fourth microstrip line and the 90-degree phase shifting unit fifth microstrip line; the sixth microstrip line of the 90-degree phase shift unit, the seventh microstrip line of the 90-degree phase shift unit and the eighth microstrip line of the 90-degree phase shift unit form a 90-degree phase shift branch, wherein,

the first end of the first microstrip line of the 90-degree phase shifting unit is connected with the first end of the sixth microstrip line of the 90-degree phase shifting unit, the first end of the first microstrip line of the 90-degree phase shifting unit is connected with the 180-degree phase shifting unit, the second end of the first microstrip line of the 90-degree phase shifting unit is connected with the first end of the third microstrip line of the 90-degree phase shifting unit, and the first end of the second microstrip line of the 90-degree phase shifting unit is connected with the first end of the third microstrip line of the 90-degree phase shifting unit; the second end of the third microstrip line of the 90-degree phase shift unit is connected with the first end of the fifth microstrip line of the 90-degree phase shift unit, and the first end of the fourth strip line of the 90-degree phase shift unit is connected with the first end of the fifth microstrip line of the 90-degree phase shift unit; the second end of the fifth microstrip line of the 90-degree phase shifting unit is connected with the first end of the eighth microstrip line of the 90-degree phase shifting unit, the second end of the eighth microstrip line of the 90-degree phase shifting unit is connected with the first end of the seventh microstrip line of the 90-degree phase shifting unit, and the second end of the seventh microstrip line of the 90-degree phase shifting unit is connected with the second end of the sixth microstrip line of the 90-degree phase shifting unit;

the first end of the first switch element of the 90-degree phase shift unit is connected with the second end of the first microstrip line of the 90-degree phase shift unit; a second end of the first switch element of the 90 ° phase shift unit is connected to a first end of a fifth capacitor of the 90 ° phase shift unit, a second end of the fifth capacitor of the 90 ° phase shift unit is grounded, a first end of a first inductor of the 90 ° phase shift unit is connected to a first end of the fifth capacitor of the 90 ° phase shift unit, a second end of the first inductor of the 90 ° phase shift unit is connected to a first end of the first capacitor of the 90 ° phase shift unit, and a second end of the first capacitor of the 90 ° phase shift unit is grounded;

a first end of the second switch element of the 90-degree phase shift unit is connected to a first end of the fifth microstrip line of the 90-degree phase shift unit, a second end of the second switch element of the 90-degree phase shift unit is connected to a first end of the sixth capacitor of the 90-degree phase shift unit, a second end of the sixth capacitor of the 90-degree phase shift unit is grounded, a first end of the second inductor of the 90-degree phase shift unit is connected to a first end of the sixth capacitor of the 90-degree phase shift unit, a second end of the second inductor of the 90-degree phase shift unit is connected to a first end of the second capacitor of the 90-degree phase shift unit, a second end of the second capacitor of the 90-degree phase shift unit is grounded, and a first end of the second capacitor of the 90-degree phase shift unit is connected to a first end of the first capacitor of the 90-degree phase shift unit;

a first end of the third switch element of the 90-degree phase shift unit is connected to a second end of the sixth microstrip line of the 90-degree phase shift unit, a second end of the third switch element of the 90-degree phase shift unit is connected to a first end of the seventh capacitor of the 90-degree phase shift unit, a second end of the seventh capacitor of the 90-degree phase shift unit is grounded, a first end of the second inductor of the 90-degree phase shift unit is connected to a first end of the seventh capacitor of the 90-degree phase shift unit, a second end of the second inductor of the 90-degree phase shift unit is connected to a first end of the third capacitor of the 90-degree phase shift unit, and a second end of the third capacitor of the 90-degree phase shift unit is grounded;

a first end of a fourth switch element of the 90-degree phase shift unit is connected to a second end of an eighth microstrip line of the 90-degree phase shift unit, a second end of the fourth switch element of the 90-degree phase shift unit is connected to a first end of an eighth capacitor of the 90-degree phase shift unit, a second end of the eighth capacitor of the 90-degree phase shift unit is grounded, a first end of a second inductor of the 90-degree phase shift unit is connected to a first end of an eighth capacitor of the 90-degree phase shift unit, a second end of the second inductor of the 90-degree phase shift unit is connected to a first end of a fourth capacitor of the 90-degree phase shift unit, a second end of the fourth capacitor of the 90-degree phase shift unit is grounded, and a first end of the fourth capacitor of the 90-degree phase shift unit is connected to a first end of a third capacitor of the 90-degree phase shift unit;

the second driver includes a second driver first port, a second driver second port, a second driver third port, a second driver fourth port, a second driver fifth port, and a second driver sixth port, wherein,

the first port of the second driver is connected with the first end of a second resistor of the 90-degree phase shifting unit, and the second end of the second resistor of the 90-degree phase shifting unit is connected with the first end of a first capacitor of the 90-degree phase shifting unit;

the second port of the second driver is connected with the first end of the first resistor of the 90-degree phase shift unit, and the second end of the first resistor of the 90-degree phase shift unit is connected with the first end of the third capacitor of the 90-degree phase shift unit;

a third port of the second driver is externally connected with a 90-degree control signal;

the fourth port of the second driver is grounded;

a fifth port of the second driver is externally connected with a first voltage;

a sixth port of the second driver is externally connected with a second voltage;

the first end of the ninth microstrip line of the 90-degree phase shift unit is connected with the second end of the fifth microstrip line of the 90-degree phase shift unit, and the second end of the ninth microstrip line of the 90-degree phase shift unit is connected with the 45-degree phase shift unit.

In one embodiment, the 45 ° phase shift unit includes:

a third driver, a first resistor of a 45-degree phase shift unit, a second resistor of a 45-degree phase shift unit, a first capacitor of a 45-degree phase shift unit, a second capacitor of a 45-degree phase shift unit, a third capacitor of a 45-degree phase shift unit, a fourth capacitor of a 45-degree phase shift unit, a fifth capacitor of a 45-degree phase shift unit, a sixth capacitor of a 45-degree phase shift unit, a seventh capacitor of a 45-degree phase shift unit, an eighth capacitor of a 45-degree phase shift unit, a first inductor of a 45-degree phase shift unit, a second inductor of a 45-degree phase shift unit, a third inductor of a 45-degree phase shift unit, a fourth inductor of a 45-degree phase shift unit, a first switch element of a 45-degree phase shift unit, a second switch element of a 45-degree phase shift unit, a third microstrip line of a 45-degree phase shift unit, a fourth switch element, a fourth microstrip line of a 45-degree phase shift unit, a, A fifth microstrip line of a 45-degree phase shift unit, a sixth microstrip line of a 45-degree phase shift unit, a seventh microstrip line of a 45-degree phase shift unit, an eighth microstrip line of a 45-degree phase shift unit, and a ninth microstrip line of a 45-degree phase shift unit,

the 45-degree phase-shifting unit ground state branch consists of the 45-degree phase-shifting unit first microstrip line, the 45-degree phase-shifting unit second microstrip line, the 45-degree phase-shifting unit third microstrip line, the 45-degree phase-shifting unit fourth microstrip line and the 45-degree phase-shifting unit fifth microstrip line; the sixth microstrip line of the 45-degree phase shift unit, the seventh microstrip line of the 45-degree phase shift unit and the eighth microstrip line of the 45-degree phase shift unit form a 45-degree phase shift unit phase shift branch, wherein,

the first end of the 45-degree phase shifting unit first microstrip line is connected with the first end of the 45-degree phase shifting unit sixth microstrip line, the first end of the 45-degree phase shifting unit first microstrip line is connected with the 90-degree phase shifting unit, the second end of the 45-degree phase shifting unit first microstrip line is connected with the first end of the 45-degree phase shifting unit third microstrip line, and the first end of the 45-degree phase shifting unit second microstrip line is connected with the first end of the 45-degree phase shifting unit third microstrip line; the second end of the third microstrip line of the 45-degree phase shifting unit is connected with the first end of the fifth microstrip line of the 45-degree phase shifting unit, and the first end of the fourth strip line of the 45-degree phase shifting unit is connected with the first end of the fifth microstrip line of the 45-degree phase shifting unit; the second end of the fifth microstrip line of the 45-degree phase shifting unit is connected with the first end of the eighth microstrip line of the 45-degree phase shifting unit, the second end of the eighth microstrip line of the 45-degree phase shifting unit is connected with the first end of the seventh microstrip line of the 45-degree phase shifting unit, and the second end of the seventh microstrip line of the 45-degree phase shifting unit is connected with the second end of the sixth microstrip line of the 45-degree phase shifting unit;

the first end of the first switch element of the 45-degree phase shifting unit is connected with the second end of the first microstrip line of the 45-degree phase shifting unit; a second end of the first switch element of the 45 ° phase shift unit is connected to a first end of a fifth capacitor of the 45 ° phase shift unit, a second end of the fifth capacitor of the 45 ° phase shift unit is grounded, a first end of a first inductor of the 45 ° phase shift unit is connected to a first end of the fifth capacitor of the 45 ° phase shift unit, a second end of the first inductor of the 45 ° phase shift unit is connected to a first end of the first capacitor of the 45 ° phase shift unit, and a second end of the first capacitor of the 45 ° phase shift unit is grounded;

a first end of the second switch element of the 45-degree phase shift unit is connected to a first end of the fifth microstrip line of the 45-degree phase shift unit, a second end of the second switch element of the 45-degree phase shift unit is connected to a first end of the sixth capacitor of the 45-degree phase shift unit, a second end of the sixth capacitor of the 45-degree phase shift unit is grounded, a first end of the second inductor of the 45-degree phase shift unit is connected to a first end of the sixth capacitor of the 45-degree phase shift unit, a second end of the second inductor of the 45-degree phase shift unit is connected to a first end of the second capacitor of the 45-degree phase shift unit, a second end of the second capacitor of the 45-degree phase shift unit is grounded, and a first end of the second capacitor of the 45-degree phase shift unit is connected to a first end of the first capacitor of the 45-degree phase shift unit;

a first end of the 45 ° phase shift unit third switch element is connected to a second end of the 45 ° phase shift unit sixth microstrip, a second end of the 45 ° phase shift unit third switch element is connected to a first end of the 45 ° phase shift unit seventh capacitor, a second end of the 45 ° phase shift unit seventh capacitor is grounded, a first end of the 45 ° phase shift unit second inductor is connected to a first end of the 45 ° phase shift unit seventh capacitor, a second end of the 45 ° phase shift unit second inductor is connected to a first end of the 45 ° phase shift unit third capacitor, and a second end of the 45 ° phase shift unit third capacitor is grounded;

a first end of a fourth switch element of the 45-degree phase shift unit is connected to a second end of an eighth microstrip line of the 45-degree phase shift unit, a second end of the fourth switch element of the 45-degree phase shift unit is connected to a first end of an eighth capacitor of the 45-degree phase shift unit, a second end of the eighth capacitor of the 45-degree phase shift unit is grounded, a first end of a second inductor of the 45-degree phase shift unit is connected to a first end of an eighth capacitor of the 45-degree phase shift unit, a second end of the second inductor of the 45-degree phase shift unit is connected to a first end of a fourth capacitor of the 45-degree phase shift unit, a second end of the fourth capacitor of the 45-degree phase shift unit is grounded, and a first end of the fourth capacitor of the 45-degree phase shift unit is connected to a first end of a third capacitor of the 45-degree phase shift unit;

the third driver includes a third driver first port, a third driver second port, a third driver third port, a third driver fourth port, a third driver fifth port, and a third driver sixth port, wherein,

the first port of the third driver is connected with the first end of a second resistor of the 45-degree phase shifting unit, and the second end of the second resistor of the 45-degree phase shifting unit is connected with the first end of a first capacitor of the 45-degree phase shifting unit;

the second port of the third driver is connected with the first end of the first resistor of the 45-degree phase shifting unit, and the second end of the first resistor of the 45-degree phase shifting unit is connected with the first end of the third capacitor of the 45-degree phase shifting unit;

a third port of the third driver is externally connected with a 45-degree control signal;

the fourth port of the third driver is grounded;

a fifth port of the third driver is externally connected with a first voltage;

a sixth port of the third driver is externally connected with a second voltage;

the first end of the ninth microstrip line of the 45-degree phase shift unit is connected with the second end of the fifth microstrip line of the 45-degree phase shift unit, and the second end of the ninth microstrip line of the 45-degree phase shift unit is connected with the 22.5-degree phase shift unit.

In one embodiment, the 22.5 ° phase shift unit comprises:

a fourth driver, a 22.5-degree phase shift unit first resistor, a 22.5-degree phase shift unit first capacitor, a 22.5-degree phase shift unit second capacitor, a 22.5-degree phase shift unit third capacitor, a 22.5-degree phase shift unit fourth capacitor, a 22.5-degree phase shift unit first inductor, a 22.5-degree phase shift unit second inductor, a 22.5-degree phase shift unit first switch element, a 22.5-degree phase shift unit second switch element, a 22.5-degree phase shift unit first microstrip line, a 22.5-degree phase shift unit second microstrip line, a 22.5-degree phase shift unit third microstrip line, a 22.5-degree phase shift unit fourth microstrip line, a 22.5-degree phase shift unit fifth microstrip line, and a 22.5-degree phase shift unit sixth microstrip line,

the first end of the 22.5-degree phase shift unit first microstrip line is connected with the first end of the 22.5-degree phase shift unit second microstrip line, the first end of the 22.5-degree phase shift unit first microstrip line is connected with the 45-degree phase shift unit, and the first end of the 22.5-degree phase shift unit first switch element is connected with the second end of the 22.5-degree phase shift unit first microstrip line; a second terminal of the first switch element of the 22.5 ° phase shift unit is connected to a first terminal of the third capacitor of the 22.5 ° phase shift unit, a second terminal of the third capacitor of the 22.5 ° phase shift unit is grounded, a first terminal of the first inductor of the 22.5 ° phase shift unit is connected to a first terminal of the third capacitor of the 22.5 ° phase shift unit, a second terminal of the first inductor of the 22.5 ° phase shift unit is connected to a first terminal of the first capacitor of the 22.5 ° phase shift unit, and a second terminal of the first capacitor of the 22.5 ° phase shift unit is grounded;

the second end of the second microstrip line of the 22.5-degree phase shift unit is connected with the first end of the fourth microstrip line of the 22.5-degree phase shift unit, and the first end of the third microstrip line of the 22.5-degree phase shift unit is connected with the first end of the fourth microstrip line of the 22.5-degree phase shift unit; the second end of the fourth microstrip line of the 22.5-degree phase shift unit is connected with the first end of the sixth microstrip line of the 22.5-degree phase shift unit, and the first end of the fifth microstrip line of the 22.5-degree phase shift unit is connected with the first end of the sixth microstrip line of the 22.5-degree phase shift unit; the second end of the sixth microstrip line of the 22.5-degree phase shifting unit is connected with the output unit;

a first end of the second switch element of the 22.5 ° phase shift unit is connected to a second end of the fifth microstrip line of the 22.5 ° phase shift unit, a second end of the second switch element of the 22.5 ° phase shift unit is connected to a first end of the fourth capacitor of the 22.5 ° phase shift unit, a second end of the fourth capacitor of the 22.5 ° phase shift unit is grounded, a first end of the second inductor of the 22.5 ° phase shift unit is connected to a first end of the fourth capacitor of the 22.5 ° phase shift unit, a second end of the second inductor of the 22.5 ° phase shift unit is connected to a first end of the second capacitor of the 22.5 ° phase shift unit, a second end of the second capacitor of the 22.5 ° phase shift unit is grounded, and a first end of the second capacitor of the 22.5 ° phase shift unit is connected to a first end of the first capacitor of the 22.5 ° phase shift unit;

the fourth drive includes a fourth drive first port, a fourth drive second port, a fourth drive third port, a fourth drive fourth port, a fourth drive fifth port, and a fourth drive sixth port, wherein,

the first port of the fourth driver is connected with the first end of the first resistor of the 22.5-degree phase shift unit, and the second end of the first resistor of the 22.5-degree phase shift unit is connected with the first end of the first capacitor of the 22.5-degree phase shift unit;

a third port of the fourth driver is externally connected with a 22.5-degree control signal;

the fourth driver fourth port is grounded;

a fifth port of the fourth driver is externally connected with a first voltage;

and a sixth port of the fourth driver is externally connected with a second voltage.

In a particular embodiment, the output unit comprises

A first capacitor of the output unit, a first microstrip line of the output unit and an output end,

wherein, the first end of the first capacitor of the output unit is connected with the 22.5-degree phase shift unit; the second end of the first capacitor of the output unit is connected with the first end of the first microstrip line of the output unit; and the second end of the first microstrip line of the output unit is connected with the output end.

In one particular embodiment of the method of the invention,

when the 180 ° control signal is at a low level, the first port of the first driver outputs 0V, the second port of the first driver outputs +50V, the first switching element of the 180 ° phase shift unit and the second switching element of the 180 ° phase shift unit are turned on, the third switching element of the 180 ° phase shift unit and the fourth switching element of the 180 ° phase shift unit are turned off, and at this time, the 180 ° phase shift unit is in a 0-degree phase shift state;

when the 180 ° control signal is at a high level, the first port of the first driver outputs +50V, the second port of the first driver outputs 0V, the 180 ° phase shift unit first switch element and the 180 ° phase shift unit second switch element are turned off, the 180 ° phase shift unit third switch element and the 180 ° phase shift unit fourth switch element are turned on, and at this time, the 180 ° phase shift unit is in a 180 ° phase shift state.

In one particular embodiment of the present invention,

when the 90-degree control signal is at a low level, a first port of the second driver outputs 0V, a second port of the second driver outputs +50V, the first switch element of the 90-degree phase shift unit and the second switch element of the 90-degree phase shift unit are turned on, the third switch element of the 90-degree phase shift unit and the fourth switch element of the 90-degree phase shift unit are turned off, and the 90-degree phase shift unit is in a 0-degree phase shift state;

when the 90-degree control signal is at a high level, the first port of the first driver outputs +50V, the second port of the first driver outputs 0V, the first switching element of the 90-degree phase shift unit and the second switching element of the 90-degree phase shift unit are turned off, the third switching element of the 90-degree phase shift unit and the fourth switching element of the 90-degree phase shift unit are turned on, and the 90-degree phase shift unit is in a 90-degree phase shift state.

In one particular embodiment of the present invention,

when the 45 ° control signal is at a low level, the first port of the third driver outputs 0V, the second port of the third driver outputs +50V, the 45 ° phase shift unit first switch element and the 90 ° phase shift unit second switch element are turned on, the 45 ° phase shift unit third switch element and the 90 ° phase shift unit fourth switch element are turned off, and the 45 ° phase shift unit is in a 0-degree phase shift state;

when the 45-degree control signal is at a high level, the first port of the third driver outputs +50V, the second port of the third driver outputs 0V, the 45-degree phase shift unit first switch element and the 45-degree phase shift unit second switch element are turned off, the 45-degree phase shift unit third switch element and the 45-degree phase shift unit fourth switch element are turned on, and the 45-degree phase shift unit is in a 45-degree phase shift state.

In one particular embodiment of the present invention,

when the 22.5-degree control signal is at a low level, the first port of the fourth driver outputs 0V, the first switch element of the 22.5-degree phase shift unit and the second switch element of the 22.5-degree phase shift unit are turned on, and the 22.5-degree phase shift unit is in a 0-degree phase shift state;

when the 22.5 ° control signal is at a high level, the first port of the fourth driver outputs +50V, the first switching element of the 22.5 ° phase shift unit and the second switching element of the 22.5 ° phase shift unit are turned off, and the 22.5 ° phase shift unit is in a 22.5 ° phase shift state.

In one embodiment, the first voltage is +3.3V and the second voltage is + 50V.

The beneficial effects of this application are as follows:

the application provides a low-loss digital phase shifter has reduced transmission loss, has improved isolation and power capacity between the branch road, moves the looks ware and can realize high accuracy in whole operating frequency range and move the looks, fine solution the problem that traditional digital phase shifter loss is high, have very high reliability, can be used to engineering practice.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structural diagram of a phase shifter according to an embodiment of the present application.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the following will describe embodiments of the present application in further detail with reference to the accompanying drawings.

In order to solve the problems that the conventional digital phase shifter realizes the closing of a feed loop, and a large amount of blocking capacitors and bias inductors are added on a transmission path, so that the loss is increased and the performance index of the phase shifter is deteriorated, as shown in fig. 1, the application provides a low-loss digital phase shifter, which comprises:

Wherein, the 180 ° control signal input end is connected with the c end of the driver a61, the B end of the driver a61 is connected with one end of the resistor a65, the a end of the driver a61 is connected with one end of the resistor B66, the d end of the driver a61 is grounded, the e end of the driver a61 is connected with +3.3V power supply, the f end of the driver a61 is connected with +50V power supply, the radio frequency input RFin end is connected with one end of the microstrip line 72, the other end of the microstrip line 72 is connected with one end of the capacitor a1, the other end of the capacitor a1 is connected with one end of the inductor a32 and one end of the microstrip line 73, the other end of the inductor a32 is connected with one end of the capacitor A3 and +3.3V power supply, the other end of the capacitor A3 is grounded, the other end of the microstrip line 73 is connected with one end of the microstrip line 74 and one end of the microstrip line 79, the other end of the microstrip line 74 is connected with the positive pole of the PIN diode 47, one end of the microstrip line 75 is connected with one end of the chip 3527, the negative pole of the capacitor a47 is connected with one end of the inductor B33, the other end of the capacitor A18 is grounded, the other end of the inductor B33 is connected with one end of the capacitor B4, the other end of the resistor B66, one end of the capacitor C5 and one end of the inductor C34, the other end of the capacitor B4 is grounded, the other end of the capacitor C5 is grounded, the other end of the microstrip line 75 is suspended, the other end of the microstrip line 76 is connected with one end of the microstrip line 77, the anode of the PIN diode B48 and one end of the microstrip line 78, the other end of the microstrip line 77 is suspended, the cathode of the PIN diode B48 is connected with one end of the capacitor B19 and the other end of the inductor C34, the other end of the chip capacitor B19 is grounded, the other end of the microstrip line 78 is connected with one end of the microstrip line 81 and one end of the microstrip line 82, the other end of the microstrip line 79 is connected with the anode of the PIN diode C49 and one end of the microstrip line 80, the cathode of the PIN diode C49 is connected with one end of the chip capacitor C20 and one end of the inductor D35, the other end of the chip capacitor C20 is grounded, the other end of the inductor D35 is connected with one end of a capacitor D6, the other end of the resistor A65, one end of a capacitor E7 and one end of an inductor E36, the other end of the capacitor D6 is grounded, the other end of the capacitor E7 is grounded, the other end of the microstrip line 80 is connected with the other end of the microstrip line 81 and the anode of the PIN diode D50, the cathode of the PIN diode D50 is connected with one end of the capacitor D21 and the other end of the inductor E36, and the other end of the capacitor D21 is grounded.

It should be noted that the 180 ° phase shift unit first microstrip line, the 180 ° phase shift unit second microstrip line, the 180 ° phase shift unit third microstrip line, the 180 ° phase shift unit fourth microstrip line, and the 180 ° phase shift unit fifth microstrip line form a 180 ° phase shift unit ground state branch; the sixth microstrip line of the 180-degree phase shift unit, the seventh microstrip line of the 180-degree phase shift unit and the eighth microstrip line of the 180-degree phase shift unit form a 180-degree phase shift unit phase shift branch,

for example, as shown in fig. 1, an input signal is input from microstrip line 73, a phase-shifted output signal is output from microstrip line 82, and the middle of the path passes through a basic state path formed by microstrip line 74, microstrip line 76, and microstrip line 78, or a phase-shifted state path formed by microstrip line 79, microstrip line 80, and microstrip line 81, and a specific path is selected by controlling the on/off of a diode. The basic state path or the phase-shifting state path has length difference, the phase difference required is realized through the length difference, the phase slope of the path with longer length is large, the phase of the intermediate frequency point can meet the requirement, the phase of the low frequency point is small, and the phase of the high frequency point is large, therefore, a stub microstrip line 75 and a microstrip line 77 are added in the basic state path and used for enabling the phase slope of the basic state to be consistent with the phase slope of the phase-shifting state, and finally the phase shifting of the high, medium and low frequency points can meet the expected requirement.

Similar to the structure of the 180 ° phase shift unit, the 90 ° control signal input terminal is connected to the C terminal of the driver B62, the B terminal of the driver B62 is connected to one terminal of the resistor C67, the a terminal of the driver B62 is connected to one terminal of the resistor D68, the D terminal of the driver B62 is grounded, the E terminal of the driver B62 is connected to the +3.3V power supply, the F terminal of the driver B62 is connected to the +50V power supply, the other terminal of the microstrip line 82 is connected to one terminal of the microstrip line 83 and one terminal of the microstrip line 88, the other terminal of the microstrip line 83 is connected to the anode of the PIN diode E51, one terminal of the microstrip line 84 and one terminal of the microstrip line 85, the cathode of the PIN diode E51 is connected to one terminal of the chip capacitor E22 and one terminal of the inductor F37, the other terminal of the chip capacitor E22 is grounded, the other terminal of the inductor F37 is connected to one terminal of the capacitor F8, the other terminal of the resistor D68, one terminal of the capacitor G9 and one terminal of the inductor G38, and the other terminal of the capacitor F8 is grounded, the other end of the capacitor G9 is grounded, the other end of the microstrip line 84 is suspended, the other end of the microstrip line 85 is connected with one end of the microstrip line 86, one end of the microstrip line 87 and the anode of the PIN diode F52, the other end of the microstrip line 86 is suspended, the cathode of the PIN diode F52 is connected with one end of the chip capacitor F23 and the other end of the inductor G38, the other end of the chip capacitor F23 is grounded, the other end of the microstrip line 87 is connected with one end of the microstrip line 90 and one end of the microstrip line 91, the other end of the microstrip line 88 is connected with the anode of the PIN diode G53 and one end of the microstrip line 89, the cathode of the PIN diode G53 is connected with one end of the chip capacitor G24 and one end of the inductor H39, the other end of the chip capacitor G24 is grounded, the other end of the inductor H39 is connected with one end of the capacitor H10, the other end of the resistor C67, one end of the capacitor I11 and one end of the inductor I40, the other end of the capacitor H10 is grounded, the other end of the capacitor I11 is grounded, the other end of the microstrip line 89 is connected with the other end of the microstrip line 90 and the anode of the PIN diode H54, the cathode of the PIN diode H54 is connected with one end of the chip capacitor H25 and the other end of the inductor I40, and the other end of the chip capacitor H25 is grounded.

It should be noted that the 90 ° phase shift unit ground state branch is composed of the 90 ° phase shift unit first microstrip line 83, the 90 ° phase shift unit second microstrip line 84, the 90 ° phase shift unit third microstrip line 85, the 90 ° phase shift unit fourth microstrip line 86, and the 90 ° phase shift unit fifth microstrip line 87; the 90-degree phase shift unit sixth microstrip line 88, the 90-degree phase shift unit seventh microstrip line 89 and the 90-degree phase shift unit eighth microstrip line 90 form a 90-degree phase shift unit phase shift branch, and based on the principle similar to the basic state branch and the phase shift branch in the 180-degree phase shift unit, the phase slopes of the basic state branch and the phase shift branch in the 90-degree phase shift unit are consistent.

The 45-degree control signal input end is connected with the C end of a driver C63, the b end of a driver C63 is connected with one end of a resistor E69, the a end of a driver C63 is connected with one end of a resistor F70, the d end of a driver C63 is grounded, the E end of the driver C63 is connected with a +3.3V power supply, the F end of a driver C63 is connected with a +50V power supply, the other end of a microstrip line 91 is connected with one end of a microstrip line 92 and one end of a microstrip line 97, the other end of the microstrip line 92 is connected with the anode of a PIN diode I55, one end of the microstrip line 93 and one end of the microstrip line 94, the cathode of the PIN diode I55 is connected with one end of a chip capacitor I26 and one end of an inductor J41, the other end of a chip capacitor I26 is grounded, the other end of the inductor J41 is connected with one end of a capacitor J12, the other end of a resistor F70, one end of a capacitor K13 and one end of an inductor K42, the other end of the capacitor J12 is grounded, the other end of the capacitor K13 is grounded, the other end of the microstrip line 93 is suspended, the other end of the microstrip line 94 is connected with one end of a microstrip line 95, one end of the microstrip line 96 and the anode of a PIN diode J56, the other end of the microstrip line 95 is suspended, the cathode of a PIN diode J56 is connected with one end of a chip capacitor J27 and the other end of an inductor K42, the other end of a chip capacitor J27 is grounded, the other end of the microstrip line 96 is connected with one end of a microstrip line 99 and one end of a microstrip line 100, the other end of the microstrip line 97 is connected with the anode of a PIN diode K57 and one end of a microstrip line 98, the cathode of a PIN diode K57 is connected with one end of a chip capacitor K28 and one end of an inductor H43, the other end of a chip capacitor K28 is grounded, the other end of an inductor L43 is connected with one end of a microstrip line L14, the other end of a resistor E69, one end of a capacitor M15 and one end of an inductor M44, the other end of a capacitor L14 is grounded, the other end of a capacitor M15 is grounded, the other end of a microstrip line 98 is connected with the other end of a PIN diode L58, the negative electrode of the PIN diode L58 is connected with one end of the chip capacitor L29 and the other end of the inductor M44, and the other end of the chip capacitor L29 is grounded.

It should be noted that the 45 ° phase shift unit first microstrip line, the 45 ° phase shift unit second microstrip line, the 45 ° phase shift unit third microstrip line, the 45 ° phase shift unit fourth microstrip line, and the 45 ° phase shift unit fifth microstrip line form a 45 ° phase shift unit ground state branch; the 45-degree phase shift unit phase shift branch is composed of a sixth microstrip line of the 45-degree phase shift unit, a seventh microstrip line of the 45-degree phase shift unit and an eighth microstrip line of the 45-degree phase shift unit,

based on the principle similar to the basic state branch and the phase-shifted branch in the 180-degree phase-shifted unit, the phase slopes of the basic state branch and the phase-shifted branch in the 45-degree phase-shifted unit are consistent.

The 22.5-degree control signal input end is connected with the c end of a driver D64, the a end of a driver D64 is connected with one end of a resistor G71, the D end of the driver D64 is grounded, the e end of the driver D64 is connected with a +3.3V power supply, the f end of a driver D64 is connected with a +50V power supply, the other end of a microstrip line 100 is connected with one end of a microstrip line 101 and one end of a microstrip line 102, the other end of the microstrip line 101 is connected with the anode of a PIN diode M59, the cathode of the PIN diode M59 is connected with one end of a chip capacitor M30 and one end of an inductor N45, the other end of the chip capacitor M30 is grounded, the other end of the inductor N45 is connected with one end of a capacitor N16, the pull end of the resistor G71, one end of a capacitor O17 and one end of the inductor O46, one end of the capacitor N16 is grounded, one end of a capacitor O17 is grounded, the other end of the microstrip line 102 is connected with one end of a microstrip line 103 and one end of a microstrip line 104, and the other end of the microstrip line 103 is suspended, the other end of the microstrip line 104 is connected with one end of a microstrip line 105 and one end of a microstrip line 106, the other end of the microstrip line 105 is connected with the anode of a PIN diode N60, the cathode of the PIN diode N60 is connected with one end of a chip capacitor N31 and the other end of an inductor O46, the other end of a chip capacitor N31 is grounded, the other end of the microstrip line 106 is connected with one end of a chip capacitor B2 and one end of a microstrip line 107, and the other end of the microstrip line 107 is connected with a radio frequency output (RFout).

The application provides a low-loss phase shifter, which greatly reduces the number of blocking capacitors and bias inductors on a signal transmission path by adding a chip capacitor between a parallel PIN diode and the ground and applying a control voltage at the junction of the PIN diode and the chip capacitor, for example, adding a capacitor A18 and a capacitor B19 between a parallel PIN diode A47 and a diode B48 and the ground, applying the control voltage at the junction of a diode A47 and the capacitor A18 through an inductor B33 and applying the control voltage at the junction of the diode B48 and the capacitor B19 through an inductor C34.

Furthermore, only 2 blocking capacitors (capacitor a1, capacitor B2) and bias inductor a32 are arranged on the transmission path of the feed circuit of the phase shifter shown in fig. 1, so that the transmission loss is effectively reduced, and the problem of large loss of the conventional digital phase shifter is solved.

In addition, the design mode of combining a parallel PIN diode and a switch line type and a loading line (microstrip line) is adopted, and a branch loading line is added to the ground state branch, so that the phase slope of the ground state branch and the phase slope of the phase-shifting branch are kept consistent, and the phase shifter can realize high-precision phase shifting in the whole working frequency range.

In one embodiment, driver a61, driver B62, driver C63, and driver D64 are high current, high voltage, high speed drivers that can provide a large drive current and a high cutoff voltage for PIN diodes; the increase of the driving current can reduce the on-resistance of the diode, so that the isolation and the bearing average power are increased, the cut-off voltage is increased, the diode can work in a safe cut-off area, meanwhile, the cut-off capacitance value of the diode is reduced, the loss of the diode can be effectively reduced, and the peak power capacity is improved.

For example, when the 180 ° control signal is low, the a port of the driver a61 outputs 0V, the B port of the driver a61 outputs +50V, the PIN diode a47 and the PIN diode B48 are turned on, and the PIN diode C49 and the PIN diode D50 are turned off, so that the 180 ° phase shift unit is in a 0 degree phase shift state;

when the 180 ° control signal is at high level, the a port of the driver a61 outputs +50V, the B port of the driver a61 outputs 0V, the PIN diode a47 and the PIN diode B48 are turned off, and the PIN diode C49 and the PIN diode D50 are turned on, so that the 180 ° phase shift unit is in a 180 ° phase shift state.

When the 90 ° control signal is at a low level, the port a of the driver B62 outputs 0V, the port B of the driver B62 outputs +50V, the PIN diode E51 and the PIN diode F52 are turned on, the PIN diode G53 and the PIN diode H54 are turned off, and the 90 ° phase shift unit is in a 0-degree phase shift state;

when the 90 ° control signal is at high level, the a port of the driver B62 outputs +50V, the B port of the driver B62 outputs 0V, the PIN diode E51 and the PIN diode F52 are turned off, and the PIN diode G53 and the PIN diode H54 are turned on, so that the 90 ° phase shift unit is in a 90 ° phase shift state.

When the 45 ° control signal is at a low level, the port a of the driver C63 outputs 0V, the port b of the driver C63 outputs +50V, the PIN diode I55 and the PIN diode J56 are turned on, and the PIN diode K57 and the PIN diode L58 are turned off, so that the 45 ° phase shift unit is in a 0-degree phase shift state;

when the 45 ° control signal is high, the a port of the driver C63 outputs +50V, the b port of the driver C63 outputs 0V, the PIN diode I55 and the PIN diode J56 are turned off, and the PIN diode K57 and the PIN diode L58 are turned on, and at this time, the 45 ° phase shift unit is in a 45 degree phase shift state.

When the control signal of 22.5 ° is at low level, the a port of the driver D64 outputs 0V, and the PIN diode M59 and the PIN diode N60 are turned on, and at this time, the 22.5 ° phase shift unit is in a 0-degree phase shift state;

when the 22.5 ° control signal is high, the a port of the driver D64 outputs +50V, and the PIN diode M59 and the PIN diode N60 are turned off, and the 22.5 ° phase shift unit is in a 22.5 degree phase shift state.

It should be understood by those skilled in the art that by the combined switching of the high and low levels of the 22.5 ° control signal, the 45 ° control signal, the 90 ° control signal and the 180 ° control signal, a 4-bit digital phase shifter with 22.5 ° stepping can be realized, the isolation and power capacity between branches can be improved, the attenuation and phase error caused by mutual coupling between branches can be reduced, and the transmission loss can be reduced.

It should be noted that the circuit substrate may adopt a TR5880 substrate with a low dielectric constant, in which the chip capacitor is designed into a slender shape by self-grinding, and simultaneously satisfies the PIN diode chip bonding pad and the bonding point for feeding, and also helps to dissipate heat. A plurality of chip units are integrated together by utilizing a multi-chip micro-assembly technology (MCM) and a microwave hybrid integration technology, and finally, the low-loss, high-power and high-precision digital phase shifter is designed.

The application provides a low-loss digital phase shifter has effectively reduced transmission loss, has improved isolation and power capacity between the branch road, moves the looks ware and can realize high accuracy in whole operating frequency range and move the looks, fine solution traditional digital phase shifter problem that the loss is high, have very high reliability, can be used to engineering practice.

In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

It is further noted that, in the description of the present application, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

It should be understood that the above-mentioned examples are given for the purpose of illustrating the present application clearly and not for the purpose of limiting the same, and that various other modifications and variations of the present invention may be made by those skilled in the art in light of the above teachings, and it is not intended to be exhaustive or to limit the invention to the precise form disclosed.

Claims

1. A low-loss digital phase shifter is characterized by comprising an input unit, a 180-degree phase shifting unit, a 90-degree phase shifting unit, a 45-degree phase shifting unit, a 22.5-degree phase shifting unit and an output unit, wherein the phase shifting units are connected in series, and the cascade sequence is as follows: a 180-degree phase shift unit, a 90-degree phase shift unit, a 45-degree phase shift unit and a 22.5-degree phase shift unit,

wherein the 180 ° phase shift unit includes:

a first driver (A61), a 180 DEG phase shift unit first resistor (A65), a 180 DEG phase shift unit second resistor (B66), a 180 DEG phase shift unit first capacitor (B4), a 180 DEG phase shift unit second capacitor (C5), a 180 DEG phase shift unit third capacitor (D6), a 180 DEG phase shift unit fourth capacitor (E7), a 180 DEG phase shift unit fifth capacitor (A18), a 180 DEG phase shift unit sixth capacitor (B19), a 180 DEG phase shift unit seventh capacitor (C20), a 180 DEG phase shift unit eighth capacitor (D21), a 180 DEG phase shift unit first inductor (B33), a 180 DEG phase shift unit second inductor (C34), a 180 DEG phase shift unit third inductor (D35), a 180 DEG phase shift unit fourth inductor (E36), a 180 DEG phase shift unit first switch element (A47), a 180 DEG phase shift unit second switch element (B48), a 180 DEG phase shift unit third switch element (C49), and a 180 DEG phase shift unit fourth switch element (D50), A first microstrip line (74) of a 180-degree phase shift unit, a second microstrip line (75) of a 180-degree phase shift unit, a third microstrip line (76) of the 180-degree phase shift unit, a fourth microstrip line (77) of the 180-degree phase shift unit, a fifth microstrip line (78) of the 180-degree phase shift unit, a sixth microstrip line (79) of the 180-degree phase shift unit, a seventh microstrip line (80) of the 180-degree phase shift unit, an eighth microstrip line (81) of the 180-degree phase shift unit, and a ninth microstrip line (82) of the 180-degree phase shift unit,

the 180-degree phase-shifting unit ground state branch consists of the 180-degree phase-shifting unit first microstrip line, the 180-degree phase-shifting unit second microstrip line, the 180-degree phase-shifting unit third microstrip line, the 180-degree phase-shifting unit fourth microstrip line and the 180-degree phase-shifting unit fifth microstrip line; the sixth microstrip line of the 180-degree phase shift unit, the seventh microstrip line of the 180-degree phase shift unit and the eighth microstrip line of the 180-degree phase shift unit form a 180-degree phase shift unit phase shift branch, wherein,

the first driver (A61) includes a first driver first port, a first driver second port, a first driver third port, a first driver fourth port, a first driver fifth port, and a first driver sixth port, wherein,

a third port of the first driver is externally connected with a 180-degree control signal;

the fourth port of the first driver is grounded;

a fifth port of the first driver is externally connected with a first voltage;

a sixth port of the first driver is externally connected with a second voltage;

2. Phase shifter as in claim 1, characterized in that the input cell comprises an input terminal (RFin), an input cell first microstrip line (72), an input cell first capacitance (A1), an input cell second microstrip line (73), an input cell first inductance (A32) and an input cell second capacitance (A3), wherein,

3. The phase shifter according to claim 1, wherein the 90 ° phase shift unit comprises: a second driver (B62), a 90 ° phase shift unit first resistor (C67), a 90 ° phase shift unit second resistor (D68), a 90 ° phase shift unit first capacitor (F8), a 90 ° phase shift unit second capacitor (G9), a 90 ° phase shift unit third capacitor (H10), a 90 ° phase shift unit fourth capacitor (I11), a 90 ° phase shift unit fifth capacitor (E22), a 90 ° phase shift unit sixth capacitor (F23), a 90 ° phase shift unit seventh capacitor (G24), a 90 ° phase shift unit eighth capacitor (H25), a 90 ° phase shift unit first inductor (F37), a 90 ° phase shift unit second inductor (G38), a 90 ° phase shift unit third inductor (H39), a 90 ° phase shift unit fourth inductor (I40), a 90 ° phase shift unit first switch element (E51), a 90 ° phase shift unit second switch element (F52), a 90 ° phase shift unit third switch element (G53), and a 90 ° phase shift unit H54), A first microstrip line (83) of a 90-degree phase shift unit, a second microstrip line (84) of the 90-degree phase shift unit, a third microstrip line (85) of the 90-degree phase shift unit, a fourth microstrip line (86) of the 90-degree phase shift unit, a fifth microstrip line (87) of the 90-degree phase shift unit, a sixth microstrip line (88) of the 90-degree phase shift unit, a seventh microstrip line (89) of the 90-degree phase shift unit, an eighth microstrip line (90) of the 90-degree phase shift unit, and a ninth microstrip line (91) of the 90-degree phase shift unit,

the 90-degree phase shifting unit ground state branch circuit is formed by the 90-degree phase shifting unit first microstrip line, the 90-degree phase shifting unit second microstrip line, the 90-degree phase shifting unit third microstrip line, the 90-degree phase shifting unit fourth microstrip line and the 90-degree phase shifting unit fifth microstrip line; the sixth microstrip line of the 90-degree phase shift unit, the seventh microstrip line of the 90-degree phase shift unit and the eighth microstrip line of the 90-degree phase shift unit form a 90-degree phase shift branch circuit, wherein,

the second driver (B62) includes a second driver first port, a second driver second port, a second driver third port, a second driver fourth port, a second driver fifth port, and a second driver sixth port, wherein,

the first port of the second driver is connected with the first end of a second resistor of the 90-degree phase shift unit, and the second end of the second resistor of the 90-degree phase shift unit is connected with the first end of a first capacitor of the 90-degree phase shift unit;

the second port of the second driver is connected with the first end of the first resistor of the 90-degree phase shifting unit, and the second end of the first resistor of the 90-degree phase shifting unit is connected with the first end of the third capacitor of the 90-degree phase shifting unit;

the fourth port of the second driver is grounded;

a fifth port of the second driver is externally connected with a first voltage;

4. The phase shifter according to claim 1, wherein the 45 ° phase shift unit comprises: a third driver (C63), a 45 DEG phase shift unit first resistance (E69), a 45 DEG phase shift unit second resistance (F70), a 45 DEG phase shift unit first capacitance (J12), a 45 DEG phase shift unit second capacitance (K13), a 45 DEG phase shift unit third capacitance (L114), a 45 DEG phase shift unit fourth capacitance (M15), a 45 DEG phase shift unit fifth capacitance (I26), a 45 DEG phase shift unit sixth capacitance (J27), a 45 DEG phase shift unit seventh capacitance (K28), a 45 DEG phase shift unit eighth capacitance (L29), a 45 DEG phase shift unit first inductance (J41), a 45 DEG phase shift unit second inductance (K42), a 45 DEG phase shift unit third inductance (L43), a 45 DEG phase shift unit fourth inductance (M44), a 45 DEG phase shift unit first switching element (I55), a 45 DEG phase shift unit second switching element (J56), a 45 DEG phase shift unit third switching element (K57), and a 45 DEG phase shift unit fourth switching element (L58), A first microstrip line (92) of a 45-degree phase shift unit, a second microstrip line (93) of a 45-degree phase shift unit, a third microstrip line (94) of a 45-degree phase shift unit, a fourth microstrip line (95) of a 45-degree phase shift unit, a fifth microstrip line (96) of a 45-degree phase shift unit, a sixth microstrip line (97) of a 45-degree phase shift unit, a seventh microstrip line (98) of a 45-degree phase shift unit, an eighth microstrip line (99) of a 45-degree phase shift unit and a ninth microstrip line (100) of a 45-degree phase shift unit,

the 45-degree phase-shifting unit ground state branch circuit is formed by the 45-degree phase-shifting unit first microstrip line, the 45-degree phase-shifting unit second microstrip line, the 45-degree phase-shifting unit third microstrip line, the 45-degree phase-shifting unit fourth microstrip line and the 45-degree phase-shifting unit fifth microstrip line; the sixth microstrip line of the 45-degree phase shift unit, the seventh microstrip line of the 45-degree phase shift unit and the eighth microstrip line of the 45-degree phase shift unit form a 45-degree phase shift unit phase shift branch, wherein,

the third driver (C63) includes a third driver first port, a third driver second port, a third driver third port, a third driver fourth port, a third driver fifth port, and a third driver sixth port, wherein,

the fourth port of the third driver is grounded;

a fifth port of the third driver is externally connected with a first voltage;

a sixth port of the third driver is externally connected with a second voltage;

5. The phase shifter according to claim 1, wherein the 22.5 ° phase shift unit comprises:

a fourth driver (D64), a 22.5 ° phase shift unit first resistor (G71), a 22.5 ° phase shift unit first capacitor (N16), a 22.5 ° phase shift unit second capacitor (O17), a 22.5 ° phase shift unit third capacitor (M30), a 22.5 ° phase shift unit fourth capacitor (N31), a 22.5 ° phase shift unit first inductor (N45), a 22.5 ° phase shift unit second inductor (O46), a 22.5 ° phase shift unit first switch element (M59), a 22.5 ° phase shift unit second switch element (N60), a 22.5 ° phase shift unit first microstrip line (101), a 22.5 ° phase shift unit second microstrip line (102), a 22.5 ° phase shift unit third microstrip line (103), a 22.5 ° phase shift unit fourth microstrip line (104), a 22.5 ° phase shift unit fifth microstrip line (105), and a 22.5 ° phase shift unit sixth microstrip line (106),

the fourth drive (D64) including a fourth drive first port, a fourth drive second port, a fourth drive third port, a fourth drive fourth port, a fourth drive fifth port, and a fourth drive sixth port, wherein,

the fourth driver fourth port is grounded;

a fifth port of the fourth driver is externally connected with a first voltage;

6. Phase shifter as in claim 1, characterized in that the output unit comprises

An output unit first capacitor (B2), an output unit first microstrip line (107) and an output (RFout),

7. The phase shifter according to claim 1,

8. The phase shifter according to claim 3,

9. The phase shifter as recited in claim 4,

when the 45 ° control signal is at a low level, the first port of the third driver outputs 0V, the second port of the third driver outputs +50V, the first switch element of the 45 ° phase shift unit and the second switch element of the 90 ° phase shift unit are turned on, the third switch element of the 45 ° phase shift unit and the fourth switch element of the 90 ° phase shift unit are turned off, and the 45 ° phase shift unit is in a 0-degree phase shift state;

10. The phase shifter as recited in claim 5,

11. Phase shifter as in any of claims 1-5, characterized in that the first voltage is +3.3V and the second voltage is + 50V.