一种10位数字移相器
By using a cascaded structure of four phase-shifting units and a 6-bit digital phase-shifting circuit, combined with an impedance matching network and a power supply control circuit, a 10-bit digital phase shifter was realized. This solved the problem of low phase control accuracy in existing technologies, improved signal processing quality and accuracy, and met the needs of high-end applications.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHENGDU TIANMAO TECH CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-07-17
AI Technical Summary
The low phase control accuracy of existing digital phase shifters results in insufficient signal processing quality and accuracy, making it difficult to meet the needs of high-end applications such as automotive 77GHz imaging radar.
A cascaded structure of four phase-shifting units and a 6-bit digital phase-shifting circuit is adopted, combined with an impedance matching network and a power supply control circuit, to realize a 10-bit digital phase shifter. Signals are transmitted through microstrip lines or striplines, which shortens the signal transmission distance and allows independent control of each phase-shifting unit, reducing losses and phase distortion.
It improves phase control accuracy, enhances signal processing quality and accuracy, and improves the target resolution and angle estimation accuracy of radar in high-precision imaging scenarios.
Smart Images
Figure CN224521031U_ABST
Abstract
Claims
1. A 10-bit digital phase shifter characterized by: The phase shift unit group, the digital phase shift circuit, and the amplifier are connected in series, and the power supply control circuit is connected with the phase shift unit group, the digital phase shift circuit, and the amplifier respectively. The phase shift unit group comprises a first phase shift unit, a second phase shift unit, a third phase shift unit, and a fourth phase shift unit connected in series, wherein the phase of the first phase shift unit is 0.35°, the phase of the second phase shift unit is 0.7°, the phase of the third phase shift unit is 1.4°, and the phase of the fourth phase shift unit is 2.8°. The digital phase shift circuit is a 6-bit digital phase shift circuit, and the six phases of the 6-bit digital phase shift circuit are 5.625°, 11.25°, 22.5°, 45°, 90°, and 180° in sequence.
2. A 10-bit phase shifter as claimed in claim 1, characterized in that: The first phase shift unit, the second phase shift unit, the third phase shift unit, and the fourth phase shift unit each comprise two PIN switches connected in parallel.
3. A 10-bit phase shifter as claimed in claim 2, characterized in that: The two PIN switches are connected by a microstrip line or a strip line.
4. A 10-bit phase shifter as claimed in claim 1, characterized in that: The power supply control circuit comprises a phase shift unit group power supply control circuit, a 6-bit digital phase shift power supply control circuit, and an amplifier power supply circuit, wherein the output end of the phase shift unit group power supply control circuit is connected with each phase shift unit, the 6-bit digital phase shift power supply control circuit is connected with the 6-bit digital phase shift circuit, and the amplifier power supply circuit is connected with the amplifier.
5. A 10-bit phase shifter as claimed in claim 4, characterized in that: The phase shift unit group power supply control circuit comprises a PIN switch driving circuit and a bias circuit, the output end of the bias circuit is connected with the input end of the PIN switch driving circuit, and the output end of the PIN switch driving circuit is connected with each phase shift unit respectively.
6. A 10-bit phase shifter as claimed in claim 5, characterized in that: The PIN switch driving circuit comprises a first driving chip, a second driving chip, and eight driving circuits, the input end of each of the eight driving circuits is connected with the OA1 pin of the first driving chip, the OB1 pin of the first driving chip, the OA2 pin of the first driving chip, the OB2 pin of the first driving chip, the OA3 pin of the first driving chip, the OB3 pin of the first driving chip, the OA1 pin of the second driving chip, and the OB1 pin of the second driving chip in sequence, the output end of each of the driving circuits is connected with a corresponding PIN switch, and the driving circuit comprises a switch driving capacitor, a first switch driving resistor, and a second switch driving resistor connected in parallel.
7. A 10-bit phase shifter as claimed in claim 6, characterized in that: The bias circuit comprises a first bias circuit and a second bias circuit, the first bias circuit comprises a first bias chip, the second bias circuit comprises a second bias chip, the OUT pin of the first bias chip is connected with the VEE pin of the first driving chip and the VEE pin of the second driving chip respectively, the VIN pin of the first bias chip is connected with the VCC pin of the first driving chip, the Vop1 pin of the first driving chip, the VCC pin of the second driving chip, and the Vop1 pin of the second driving chip respectively, and the IN pin of the second bias chip is connected with the VCC pin of the first driving chip, the Vop1 pin of the first driving chip, the VCC pin of the second driving chip, and the Vop1 pin of the second driving chip respectively.