CN110912533A - 360-degree range step-by-step combined radio frequency phase adjusting circuit - Google Patents
360-degree range step-by-step combined radio frequency phase adjusting circuit Download PDFInfo
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- CN110912533A CN110912533A CN201911273087.9A CN201911273087A CN110912533A CN 110912533 A CN110912533 A CN 110912533A CN 201911273087 A CN201911273087 A CN 201911273087A CN 110912533 A CN110912533 A CN 110912533A
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- 238000001514 detection method Methods 0.000 claims abstract description 4
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- 239000003990 capacitor Substances 0.000 claims description 24
- 230000008859 change Effects 0.000 abstract description 6
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H11/00—Networks using active elements
- H03H11/02—Multiple-port networks
- H03H11/16—Networks for phase shifting
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Abstract
The invention discloses a radio frequency phase adjusting circuit with a 360-degree range step combination, which comprises a temperature sensor, a digital circuit, a phase shifter and a small step phase adjusting circuit, wherein the temperature sensor is used for detecting the temperature of a radio frequency signal; the method is characterized in that: the temperature sensor detects the temperature of the radio frequency integrated circuit and outputs a temperature detection signal to the digital circuit; the digital circuit converts the temperature signal output by the temperature sensor into a control code for phase shift control, and respectively outputs the control code to the phase shifter and the small stepping phase adjusting circuit; the phase shifter receives a radio frequency input signal, performs phase adjustment according to a phase shift control code output by the digital circuit, and outputs the radio frequency input signal to the small stepping phase adjustment circuit; the small stepping phase adjusting circuit adjusts the phase of the signal output by the phase shifter according to the phase shift control code output by the digital circuit and outputs the signal; the invention realizes the phase adjustment in the 360-degree full range, is a large and small stepping combined debugging circuit which can cover the 360-degree full range, has more accurate phase adjustment, and meets the automatic change compensation of the phase along with the temperature change; can be widely applied to the fields of wireless communication and the like.
Description
Technical Field
The invention relates to a radio frequency phase shifter, in particular to a radio frequency phase adjusting circuit with 360-degree range step combination.
Background
With the improvement of the positioning precision and the anti-interference requirement, the development of a high-precision phase radio frequency receiver is promoted. The existing radio frequency phase shifter adopts an analog phase shifter and a digital phase shifter, but the analog phase shifter and a combined circuit thereof can better realize the phase adjustment of the phase at the full working temperature, but have the problems of high cost, large volume, high voltage requirement and the like, thereby limiting the application of the radio frequency phase shifter in products with high precision phase requirement. The digital phase shifter has the problems of large phase stepping, large stepping error and the like, so that the application of the digital phase shifter in products with high-precision phase requirements is limited.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a 360 ° range step-by-step combined rf phase adjusting circuit.
In order to solve the above technical problem, a first technical solution of the present invention is: a radio frequency phase adjusting circuit with a 360-degree range step combination comprises a temperature sensor, a digital circuit, a phase shifter and a small step phase adjusting circuit; the method is characterized in that:
the temperature sensor detects the temperature of the radio frequency integrated circuit and outputs a temperature detection signal to the digital circuit;
the digital circuit converts the temperature signal output by the temperature sensor into a control code for phase shift control, and respectively outputs the control code to the phase shifter and the small stepping phase adjusting circuit;
the phase shifter receives a radio frequency input signal, performs phase adjustment according to a phase shift control code output by the digital circuit, and outputs the radio frequency input signal to the small stepping phase adjustment circuit;
and the small stepping phase adjusting circuit performs phase adjustment on the signal output by the phase shifter according to the phase shift control code output by the digital circuit and outputs the signal.
The invention utilizes the phase shifter to carry out large-step phase adjustment and utilizes the small-step phase adjustment circuit to carry out small-step phase adjustment, thereby solving the problems of large phase-shifting step, poor precision and incapability of realizing high-precision phase adjustment of a digital phase-shifting circuit. The performance of the analog phase-shift circuit is achieved, but the volume is smaller, the voltage requirement is lower, the phase adjustment in the 360-degree full range is realized, the phase parameter of the finally formed full-temperature phase-shift circuit is stored in a digital circuit, and automatic compensation is carried out along with the temperature.
According to the preferable scheme of the radio frequency phase adjusting circuit with the step combination in the 360-degree range, the small step phase adjusting circuit comprises an adjustable capacitor, a first tolerance capacitor and a second tolerance capacitor; the first tolerance capacitor and the second tolerance capacitor are connected in series and then connected with the adjustable capacitor in parallel; the adjustable capacitor is used for adjusting the capacitance value by the phase-shifting control code output by the digital circuit.
The optimal scheme can be adjusted according to the frequency and the adjustable capacitance range, the phase adjustable range of the small-step phase adjusting circuit is mainly expanded or reduced, the optimal scheme is used as a tolerance design, the reliability is improved, the circuit functions are normal under the condition that the adjustable capacitance or the tolerance capacitance is damaged, the phase change is in a certain range, and if the phase adjustable range is reduced, the phase change amplitude is smaller.
The radio frequency phase adjusting circuit with the step combination in the 360-degree range has the beneficial effects that: the invention utilizes the phase shifter to carry out large-step phase adjustment, utilizes the small-step phase adjustment circuit to carry out small-step phase adjustment, solves the problems of large phase-shift step, poor precision and incapability of realizing high-precision phase adjustment of a digital phase-shift circuit, achieves the performance of an analog phase-shift circuit, has smaller volume and lower voltage requirement, realizes 360-degree full-range phase adjustment, is a large-step combined debugging circuit which can cover 360 degrees, can effectively make up the defects of the existing scheme, has more accurate phase adjustment, can adjust and maintain the full working range, and meets the automatic change compensation of the phase along with the temperature change; the invention can be widely applied to the fields of wireless communication and the like.
Drawings
Fig. 1 is a schematic block diagram of a 360 ° range step-by-step rf phase adjusting circuit.
Detailed Description
The present invention will be described in further detail with reference to test examples and specific embodiments. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
Referring to fig. 1, a radio frequency phase adjustment circuit with a 360 ° range step combination comprises a temperature sensor 1, a digital circuit 2, a phase shifter 3 and a small step phase adjustment circuit 4.
The temperature sensor 1 detects the temperature of the radio frequency integrated circuit and outputs a temperature detection signal to the digital circuit 2.
The digital circuit 2 stores phase parameters of full temperature, and the digital circuit 2 converts the temperature signal output by the temperature sensor 1 into a control code for phase shift control according to the phase parameters of full temperature and outputs the control code to the phase shifter 3 and the small-step phase adjusting circuit 4 respectively.
The phase shifter 3 receives a radio frequency input signal, performs phase adjustment according to a phase shift control code output by the digital circuit 2, and outputs the phase adjusted signal to the small step phase adjusting circuit 4.
And the small stepping phase adjusting circuit 4 performs phase adjustment on the signal output by the phase shifter 3 according to the phase shift control code output by the digital circuit 2 and outputs the signal.
The large-step phase adjustment is realized by realizing the phase adjustment of stepping at about 5.625 degrees, and different digital phase shifters can be selected according to different working frequency bands due to the error of stepping caused by precision temperature.
The small step phase adjustment realizes the phase adjustment of about 0.1 degree by adjusting the capacitance value of the adjustable capacitor C1, and the phase adjustment range of the small step phase adjustment circuit can be adjusted by adjusting the capacitance values of C2 and C3 and is larger than the range of large step phase adjustment, thereby realizing the phase adjustment with 0.1 degree precision within the range of 360 degrees.
In a specific embodiment, the small step phase adjustment circuit 4 includes an adjustable capacitor C1, a first tolerance capacitor C2, a second tolerance capacitor C3; the first tolerance capacitor C2 and the second tolerance capacitor C3 are connected in series and then connected with the adjustable capacitor C1 in parallel; the adjustable capacitor C1 is used for adjusting the capacitance value by the phase-shift control code output by the digital circuit 2.
In a specific embodiment, tunable capacitor C1 is selected to be an RFAC3612 stepped 0.25pF tunable capacitor. It is noted that below 2pF, the phase is influenced by the inductance greatly, the stepping is wider than the capacitive range, the adjustable range is larger, and the large stepping phase adjusting circuit can be compensated indirectly.
When the series capacitance of C2 and C3 is about 3.5pF, the adjustable phase is about 6 degrees in the capacitance range near 3 GHz.
The phase adjustment is carried out on different temperatures, corresponding control codes are stored in the digital circuit, and the phase consistency in the full-temperature range is kept through linkage of the temperature sensors.
For example: at the normal temperature of 25 ℃, the control code output to the phase shifter by the digital circuit 2 is 0B, and the control code output to the small stepping phase adjusting circuit 4 in a small mode is 26; at low temperature-15 degrees: the control code output from the digital circuit 2 to the phase shifter is 0A, and the control code output from the small step phase adjusting circuit 4 is 3F.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.
Claims (2)
1. A radio frequency phase adjusting circuit with a 360-degree range step combination comprises a temperature sensor (1), a digital circuit (2), a phase shifter (3) and a small step phase adjusting circuit (4); the method is characterized in that:
the temperature sensor (1) detects the temperature of the radio frequency integrated circuit and outputs a temperature detection signal to the digital circuit (2);
the digital circuit (2) converts the temperature signal output by the temperature sensor (1) into a control code for phase shift control, and respectively outputs the control code to the phase shifter (3) and the small stepping phase adjusting circuit (4);
the phase shifter (3) receives a radio frequency input signal, performs phase adjustment according to a phase shift control code output by the digital circuit (2), and outputs the phase adjustment to the small stepping phase adjustment circuit (4);
and the small stepping phase adjusting circuit (4) performs phase adjustment on the signal output by the phase shifter (3) according to the phase shift control code output by the digital circuit (2) and outputs the signal.
2. The rf phase adjusting circuit of claim 1, wherein the rf phase adjusting circuit comprises a 360 ° range step combination circuit: the small step phase adjusting circuit (4) comprises an adjustable capacitor (C1), a first tolerance capacitor (C2), a second tolerance capacitor (C3); the first tolerance capacitor (C2) and the second tolerance capacitor (C3) are connected in series and then are connected in parallel with the adjustable capacitor (C1); the adjustable capacitor (C1) is used for adjusting the capacitance value by the phase-shifting control code output by the digital circuit (2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911273087.9A CN110912533A (en) | 2019-12-12 | 2019-12-12 | 360-degree range step-by-step combined radio frequency phase adjusting circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911273087.9A CN110912533A (en) | 2019-12-12 | 2019-12-12 | 360-degree range step-by-step combined radio frequency phase adjusting circuit |
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| CN110912533A true CN110912533A (en) | 2020-03-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474522A (en) * | 2020-04-23 | 2020-07-31 | 西安电子工程研究所 | Compensation circuit with different clock phase synchronization |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201387563Y (en) * | 2009-04-10 | 2010-01-20 | 中国地质大学（武汉） | Radio frequency impedance matching device |
| CN105552485A (en) * | 2015-11-18 | 2016-05-04 | 北京邮电大学 | Microwave phase shifter |
| CN107681992A (en) * | 2017-10-20 | 2018-02-09 | 绵阳鑫阳知识产权运营有限公司 | A kind of six bit digital phase shifters |
| CN107942776A (en) * | 2017-11-03 | 2018-04-20 | 成都赛英科技有限公司 | 8 temperature compensating type digital phase shifters |
| CN108649922A (en) * | 2018-05-30 | 2018-10-12 | 南京国博电子有限公司 | A kind of temperature compensating type phase shifter |
| CN109490839A (en) * | 2018-10-29 | 2019-03-19 | 北京遥感设备研究所 | A kind of temperature feedback phase-correcting circuit and method |
-
2019
- 2019-12-12 CN CN201911273087.9A patent/CN110912533A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201387563Y (en) * | 2009-04-10 | 2010-01-20 | 中国地质大学（武汉） | Radio frequency impedance matching device |
| CN105552485A (en) * | 2015-11-18 | 2016-05-04 | 北京邮电大学 | Microwave phase shifter |
| CN107681992A (en) * | 2017-10-20 | 2018-02-09 | 绵阳鑫阳知识产权运营有限公司 | A kind of six bit digital phase shifters |
| CN107942776A (en) * | 2017-11-03 | 2018-04-20 | 成都赛英科技有限公司 | 8 temperature compensating type digital phase shifters |
| CN108649922A (en) * | 2018-05-30 | 2018-10-12 | 南京国博电子有限公司 | A kind of temperature compensating type phase shifter |
| CN109490839A (en) * | 2018-10-29 | 2019-03-19 | 北京遥感设备研究所 | A kind of temperature feedback phase-correcting circuit and method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111474522A (en) * | 2020-04-23 | 2020-07-31 | 西安电子工程研究所 | Compensation circuit with different clock phase synchronization |
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