CN104104351A - Radio-frequency signal phase-shifting circuit - Google Patents
Radio-frequency signal phase-shifting circuit Download PDFInfo
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- CN104104351A CN104104351A CN201310120332.9A CN201310120332A CN104104351A CN 104104351 A CN104104351 A CN 104104351A CN 201310120332 A CN201310120332 A CN 201310120332A CN 104104351 A CN104104351 A CN 104104351A
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- 230000010363 phase shift Effects 0.000 claims description 54
- 239000003990 capacitor Substances 0.000 claims description 51
- 230000011514 reflex Effects 0.000 claims description 36
- 238000003780 insertion Methods 0.000 abstract description 7
- 230000037431 insertion Effects 0.000 abstract description 7
- 230000008878 coupling Effects 0.000 abstract 2
- 238000010168 coupling process Methods 0.000 abstract 2
- 238000005859 coupling reaction Methods 0.000 abstract 2
- 238000005516 engineering process Methods 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000010295 mobile communication Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Abstract
The invention provides a radio-frequency signal phase-shifting circuit which includes a first electrical bridge, a first signal reflection circuit, a second signal reflection circuit, a second electrical bridge, a third signal reflection circuit, a forth signal reflection circuit and a control voltage module. A direct connection end and a coupling end of the first electrical bridge are connected with the first signal reflection circuit and the second signal reflection circuit respectively. A direct connection end and a coupling end of the second electrical bridge are connected to the third signal reflection circuit and the forth signal reflection circuit respectively. An output end of the first electrical bridge is connected with an input end of the second electrical bridge. The control voltage module outputs a control voltage V1 which can be adjusted continuously to control reflection coefficients of the first signal reflection circuit and the second signal reflection circuit and outputs a control voltage V2 at the same time to control reflection coefficients of the third signal reflection circuit and the forth signal reflection circuit. The radio-frequency signal phase-shifting circuit is capable of carrying out continuous phase modulation of radio frequency signals which are input under a high-frequency high-bandwidth condition so that the circuit is flexible to control, low in insertion loss, low in in-band fluctuation and high in practicality.
Description
Technical field
The present invention relates to radiofrequency signal technology, particularly relate to a kind of radiofrequency signal phase-shift circuit.
Background technology
Phase-shift circuit, as a kind of common signal phase control circuit, all has a wide range of applications in fields such as mobile communication, phased array radar, instrument and meters.
Along with the development of the technology such as spaceborne, mobile communication, volume, weight and the performance to phase-shift circuit had more and more higher requirement.Some switching regulators, loaded type, reflective, amplify type and MEMS(MEMS (micro electro mechanical system), Micro-Electro-Mechanical Systems) Hong phase-shift circuit all obtain exploitation with development, these circuit, by using reactive components or semi-conducting material, are having advantage separately aspect different performance requirements, application scenarios.
At present, comparatively common phase-shift circuit is simulated reflections formula phase-shift circuit, sort circuit is mainly to realize phase shift by reflection electric circuit, obtain phase place variation by changing the reflection coefficient of reflection electric circuit, but under high frequency high bandwidth condition, the phase-shift circuit insertion loss of this structure is high, fluctuation is large, variation, phase place adjustable extent that be difficult to Effective Regulation phase place are little.
Summary of the invention
Based on this, be necessary for the problems referred to above, provide that a kind of insertion loss is low, passband fluctuation is little, the better radiofrequency signal phase-shift circuit of the continuous adjustability of phase place.
A kind of radiofrequency signal phase-shift circuit, comprising: the first electric bridge, first signal reflection electric circuit, secondary signal reflection electric circuit, and the second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, controls voltage module;
The straight-through end of described the first electric bridge, coupled end connect respectively described first signal reflection electric circuit, secondary signal reflection electric circuit;
The straight-through end of described the second electric bridge, coupled end connect respectively described the 3rd signal reflex circuit, the 4th signal reflex circuit;
The output of described the first electric bridge is connected with the input of described the second electric bridge, and the input of described the first electric bridge is the input of radiofrequency signal phase-shift circuit, and the output of described the second electric bridge is the output of radiofrequency signal phase-shift circuit;
The first output output continuously controllable control voltage V1 of described control voltage module controls the reflection coefficient of described first signal reflection electric circuit, secondary signal reflection electric circuit, and the second output output control voltage V2 controls the reflection coefficient of described the 3rd signal reflex circuit, the 4th signal reflex circuit.
Above-mentioned radiofrequency signal phase-shift circuit, utilize the characteristic of electric bridge, by two cascade electric bridges are set, and connect respectively signal reflex circuit in straight-through end, the coupled end of two electric bridges, form the phase modulation circuit of cascade, at the input input radio frequency signal of prime electric bridge, utilize control voltage to change the reflection coefficient of each reflection electric circuit, obtain phase place controlled phase shift signal continuously at the output of rear class electric bridge, can be under high frequency high bandwidth condition the continuous phase modulation of radiofrequency signal to input, control flexibly, insertion loss is low, passband fluctuation is little, practical.
Brief description of the drawings
Fig. 1 is the structural representation of the radiofrequency signal phase-shift circuit of an embodiment;
Fig. 2 is the structural representation of the radiofrequency signal phase-shift circuit of a preferred embodiment;
Fig. 3 is the phase shift range schematic diagram of an application example.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of radiofrequency signal phase-shift circuit of the present invention is described in detail.
Shown in Figure 1, Fig. 1 shows the structural representation of the radiofrequency signal phase-shift circuit of an embodiment, mainly comprises: the first electric bridge, first signal reflection electric circuit, secondary signal reflection electric circuit, the second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, controls voltage module.
The straight-through end of described the first electric bridge, coupled end connect respectively described first signal reflection electric circuit, secondary signal reflection electric circuit.
The straight-through end of described the second electric bridge, coupled end connect respectively described the 3rd signal reflex circuit, the 4th signal reflex circuit.
The output of described the first electric bridge is connected with the input of described the second electric bridge, and the input of described the first electric bridge is the input of radiofrequency signal phase-shift circuit, and the output of described the second electric bridge is the output of radiofrequency signal phase-shift circuit.
The first output output continuously controllable control voltage V1 of described control voltage module controls the reflection coefficient of described first signal reflection electric circuit, secondary signal reflection electric circuit, and the second output output control voltage V2 of described control voltage module controls the reflection coefficient of described the 3rd signal reflex circuit, the 4th signal reflex circuit.
Wherein, in the first electric bridge, the second electric bridge, P1, P5 port are respectively input, and P4, P8 port are straight-through end, and P3, P7 port are coupled end, and P2, P6 port are isolation end, and P2, P6 port are respectively as the output of the first electric bridge and the second electric bridge.Radiofrequency signal is inputted from P1 port, enter first signal reflection electric circuit, secondary signal reflection electric circuit at P3, P4 port respectively, control the first output U1 output of voltage module and control voltage V1 to first signal reflection electric circuit, its reflection coefficient of secondary signal reflection electric circuit control Γ
1controlling under the control of voltage V1, produce respectively the two-way reflected signal that phase shift theta 1 has occurred, V1 is continuously controllable control voltage, adjust the reflection coefficient of first signal reflection electric circuit, secondary signal reflection electric circuit, thereby adjust the value of phase shift theta 1, these two reflected signals are output after P2 port is synthetic.
The radiofrequency signal of being exported by P2 port enters the P5 port of the second electric bridge, enter the 3rd signal reflex circuit, the 4th signal reflex circuit at P7, P8 port respectively, control the first output U2 output of voltage module and control voltage V2 to the three signal reflex circuit, the 4th its reflection coefficient of signal reflex circuit control Γ
2, controlling under the control of voltage V2, produce respectively the two-way reflected signal that phase shift theta 2 has occurred, these two reflected signals are exported from P6 port at the synthetic final phase shift signalling obtaining of P6 port.
For more clear technology of the present invention, set forth the preferred embodiment of radiofrequency signal phase-shift circuit of the present invention below in conjunction with accompanying drawing.
Shown in Figure 2, Fig. 2 is the structural representation of the radiofrequency signal phase-shift circuit of a preferred embodiment.
In one embodiment, the first electric bridge and the second electric bridge can adopt 3dB90 ° of electric bridge.
In one embodiment, first signal reflection electric circuit comprises: capacitor C 1, C3, variable capacitance diode D1, the D2 of two negative pole differential concatenations, inductance L 1.
Wherein, capacitor C 1 is connected between the positive pole of variable capacitance diode D1 and the straight-through end of the first electric bridge, and the positive pole of variable capacitance diode D1 is by described capacitor C 3, inductance L 1 ground connection, the plus earth of variable capacitance diode D2.
Described secondary signal reflection electric circuit comprises: capacitor C 2, C4, variable capacitance diode D3, the D4 of two negative pole differential concatenations, inductance L 2.
Wherein, capacitor C 2 is connected between the positive pole of variable capacitance diode D3 and the coupled end of the first electric bridge, and the positive pole of variable capacitance diode D3 is by described capacitor C 4, inductance L 2 ground connection, the plus earth of variable capacitance diode D4.
The negative pole of described variable capacitance diode D1, D2, D3, D4 connects the first output U1 of described control voltage module.
In above-described embodiment, capacitor C 1 in first signal reflection electric circuit is for stopping direct current signal, capacitor C 3 is for the regulating circuit linearity, inductance L 1 is for regulating circuit phase shift range and the variable capacitance diode D1 required DC loop of setovering can be provided, two variable capacitance diode D1, D2 differential concatenations connect, by this connected mode, can improve the phase-adjusted linearity, the control voltage of first signal reflection electric circuit is V1, utilize the variation of variable capacitance diode D1, D2 capacitive reactance under the reverse-biased state of difference, realize reflection coefficient Γ
1change, thereby realize the change of radiofrequency signal phase place to input, the operation principle of secondary signal reflection electric circuit is identical with first signal reflection electric circuit.
In one embodiment, further, described first signal reflection electric circuit also comprises the resistance R 1 being connected between the negative pole of described variable capacitance diode D1, D2 and the first output U1 of described control voltage module, and secondary signal reflection electric circuit also comprises the resistance R 2 between the first output U1 that is connected to the negative pole of variable capacitance diode D3, D4 and controls voltage module.
Further, radiofrequency signal phase-shift circuit also comprises: for the capacitor C 5 of decoupling; Wherein, the first output U1 of described control voltage module is by capacitor C 5 ground connection.
In the above-described embodiments, resistance R 1, R2 are for access control voltage V1 as bias voltage, and generally, the value of resistance R 1, R2 equates with the reverse-conducting resistance of variable capacitance diode D1, D2, D3, D4 or be close.Resistance R 1, R2 provide for the high resistant loop of radio frequency and level and smooth reflection coefficient Γ
1amplitude fluctuations, capacitor C 5 plays anti-interference, filtering.
In one embodiment, described the 3rd signal reflex circuit comprises: capacitor C 6, resistance R 3, PIN diode D5, inductance L 3, capacitor C 8.
Wherein, described capacitor C 6 is connected between the positive pole of PIN diode D5 and the straight-through end of the second electric bridge, the positive pole of PIN diode D5 is by resistance R 3 ground connection, positive pole, the second end Q2 that the first end Q1 of inductance L 3 connects PIN diode D5 are connected with the negative pole of PIN diode D5 by capacitor C 8, the minus earth of PIN diode D5.
Described the 4th signal reflex circuit comprises: capacitor C 7, resistance R 4, PIN diode D6, inductance L 4, capacitor C 9.
Wherein, described capacitor C 7 is connected between the positive pole of PIN diode D6 and the coupled end of the second electric bridge, the positive pole of PIN diode D6 is by resistance R 4 ground connection, positive pole, the second end Q4 that the first end Q3 of inductance L 4 connects PIN diode D6 are connected with the negative pole of PIN diode D6 by capacitor C 9, the minus earth of PIN diode D6.
The second end Q2, the Q4 of inductance L 3, L4 connects the second output U2 of described control voltage module.
In above-described embodiment, capacitor C 6, C7 are for stopping direct current signal, and resistance R 3, R4 are for level and smooth reflection coefficient Γ
2amplitude fluctuations, inductance L 3 and capacitor C 8 loops, inductance L 4 and capacitor C 9 are for regulating phase modulation scope, the control voltage of the 3rd signal reflex circuit, the 4th signal reflex circuit is provided by V2, utilizes the change of PIN diode resistance under complete conducting and zero inclined to one side state to realize reflection coefficient Γ
2change, thereby realize the change of radiofrequency signal phase place to input.
In one embodiment, described the 3rd signal reflex circuit also comprises the resistance R 5 being connected between the second end Q2 of described inductance L 3 and the second output U2 of described control voltage module, and described the 4th signal reflex circuit also comprises the resistance R 6 being connected between the second end Q4 of described inductance L 4 and the second output U2 of described control voltage module.
Further, radiofrequency signal phase-shift circuit also comprises: for the capacitor C 10 of decoupling; Wherein, the second output U2 of described control voltage module is by described capacitor C 10 ground connection.
In the above-described embodiments, resistance R 5, R6 are used for providing biasing, and generally, the value of resistance R 5, R6 equates with the reverse-conducting resistance of PIN diode D5, D6 or be close.Capacitor C 10 plays anti-interference, filtering.
In one embodiment, the capacitance of described capacitor C 1, C2 is 100pF, and the capacitance of described capacitor C 3, C4 is 0.3pF, and the inductance value of described inductance L 1, L2 is 2.7nH, and the resistance of described resistance R 1, R2 is 360 Ω, and the pressure value of described control voltage V1 is 0～10v.The capacitance of capacitor C 6, C7 is 100pF, and the capacitance of described capacitor C 8, C9 is 47pF, and the resistance of described resistance R 3, R4 is 1200 Ω, and the resistance of described resistance R 5, R6 is 100 Ω, and the pressure value of described control voltage V2 is 0 or 5v.
In the above-described embodiments, can control voltage V1, V2 by adjusting and realize the continuous phase modulation to radiofrequency signal, for example, first keep V2 output 0V, in 0V～10V interval, regulate continuously V1 simultaneously, make radiofrequency signal phase change be greater than 180 °, again V2 output is adjusted to 5V, can makes 180 ° of phase overturns, at this moment in 0V～10V interval, regulate continuously again V1,180 ° of phase changes can be made again, thereby the phase shift of 360 ° of radiofrequency signals can be realized.
In an application example, by the radiofrequency signal phase-shift circuit of above-mentioned parameter, control voltage V1, V2 by adjusting, as shown in Figure 3, Fig. 3 is the phase shift range schematic diagram of an application example, and phase-shift circuit has been realized 360 ° of above continuous phase shifts, and its performance index are as follows:
Working frequency range: 2570MHz～2620MHz;
Input port standing wave: (under free position)≤1.22;
Insertion Loss; ≤ 2.6dB;
Fluctuation :≤0.8dB;
Phase shift range: 364 ° of@2595MHz, phase fluctuation :≤8 °.
Radiofrequency signal phase-shift circuit of the present invention can adopt micro-band hybrid integration technology to realize, and all devices all adopt the mode of surface label weldering to be welded on the dielectric-slab with microstrip transmission line (characteristic impedance 50 Ω).Wherein, 3dB90 ° of electric bridge can be selected according to indexs such as required working frequency range, bandwidth, Insertion Loss, phase fluctuations.For example, can select the 1P603 of Anaren company.Variable capacitance diode can be selected the SMV1249 of Skyworks company; PIN diode can be selected the HSMP-4810 of Avago company.
The radiofrequency signal phase-shift circuit of above-described embodiment, utilize the characteristic of 3dB90 ° of electric bridge, variable capacitance diode PN junction electric capacity, the principle of PIN diode conducting resistance and its bias voltage dependence, by 90 ° of electric bridges of two 3dB, two PIN diode and four variable capacitance diodes, form a kind of reflective cascade phase modulation circuit that can realize continuous phase modulation under high frequency high bandwidth condition, in the time that the radiofrequency signal of required frequency range is inputted, control voltage V1 by suitably regulating, V2, to realize the phase shift of the number of degrees arbitrarily in 360 °, can be applied in high frequency high bandwidth situation, realization exceedes the phase shift of 360 °, Insertion Loss is low, fluctuate little, and control flexibly, it is convenient to realize, practical, in mobile communication, Aero-Space, in radar countermeasures isoelectronic series system, have a wide range of applications.
Need statement, in radiofrequency signal phase-shift circuit of the present invention, the type that the first electric bridge, the second electric bridge are not limited to set forth in above preferred embodiment, also can adopt the electric bridge of other type.The reflection electric circuit structure that first signal reflection electric circuit, secondary signal reflection electric circuit, the 3rd signal reflex circuit, the 4th signal reflex circuit are not limited to set forth in above preferred embodiment, also can adopt realizing of other form to reflect and the signal reflex circuit of capable of regulating reflection coefficient input radio frequency.
The above embodiment has only expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (10)
1. a radiofrequency signal phase-shift circuit, is characterized in that, comprising: the first electric bridge, first signal reflection electric circuit, secondary signal reflection electric circuit, and the second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, controls voltage module;
The straight-through end of described the first electric bridge, coupled end connect respectively described first signal reflection electric circuit, secondary signal reflection electric circuit;
The straight-through end of described the second electric bridge, coupled end connect respectively described the 3rd signal reflex circuit, the 4th signal reflex circuit;
The output of described the first electric bridge is connected with the input of described the second electric bridge, and the input of described the first electric bridge is the input of radiofrequency signal phase-shift circuit, and the output of described the second electric bridge is the output of radiofrequency signal phase-shift circuit;
The first output output continuously controllable control voltage V1 of described control voltage module controls the reflection coefficient of described first signal reflection electric circuit, secondary signal reflection electric circuit, and the second output output control voltage V2 controls the reflection coefficient of described the 3rd signal reflex circuit, the 4th signal reflex circuit.
2. radiofrequency signal phase-shift circuit according to claim 1, is characterized in that, described the first electric bridge and the second electric bridge are 3dB90 ° of electric bridge.
3. radiofrequency signal phase-shift circuit according to claim 1, is characterized in that, described first signal reflection electric circuit comprises:
Capacitor C 1, C3, variable capacitance diode D1, the D2 of two negative pole differential concatenations, inductance L 1; Wherein, capacitor C 1 is connected between the positive pole of variable capacitance diode D1 and the straight-through end of the first electric bridge, and the positive pole of variable capacitance diode D1 is by described capacitor C 3, inductance L 1 ground connection, the plus earth of variable capacitance diode D2;
Described secondary signal reflection electric circuit comprises:
Capacitor C 2, C4, variable capacitance diode D3, the D4 of two negative pole differential concatenations, inductance L 2; Wherein, capacitor C 2 is connected between the positive pole of variable capacitance diode D3 and the coupled end of the first electric bridge, and the positive pole of variable capacitance diode D3 is by described capacitor C 4, inductance L 2 ground connection, the plus earth of variable capacitance diode D4;
The negative pole of described variable capacitance diode D1, D2, D3, D4 connects the first output of described control voltage module.
4. radiofrequency signal phase-shift circuit according to claim 3, is characterized in that, described first signal reflection electric circuit also comprises: be connected to the resistance R 1 between the negative pole of described variable capacitance diode D1, D2 and the first output of described control voltage module;
Described secondary signal reflection electric circuit also comprises: be connected to the resistance R 2 between the negative pole of described variable capacitance diode D3, D4 and the first output of described control voltage module.
5. radiofrequency signal phase-shift circuit according to claim 4, it is characterized in that, the capacitance of described capacitor C 1, C2 is 100pF, the capacitance of described capacitor C 3, C4 is 0.3pF, the inductance value of described inductance L 1, L2 is 2.7nH, the resistance of described resistance R 1, R2 is 360 Ω, and the pressure value of described control voltage V1 is 0～10v.
6. according to the radiofrequency signal phase-shift circuit described in claim 3 or 4, it is characterized in that, also comprise: for the capacitor C 5 of decoupling; Wherein, the first output of described control voltage module is by capacitor C 5 ground connection.
7. radiofrequency signal phase-shift circuit according to claim 1, is characterized in that, described the 3rd signal reflex circuit comprises: capacitor C 6, resistance R 3, PIN diode D5, inductance L 3, capacitor C 8;
Wherein, described capacitor C 6 is connected between the positive pole of PIN diode D5 and the straight-through end of the second electric bridge, the positive pole of PIN diode D5 is by resistance R 3 ground connection, positive pole, the second end that the first end of inductance L 3 connects PIN diode D5 are connected with the negative pole of PIN diode D5 by capacitor C 8, the minus earth of PIN diode D5;
Described the 4th signal reflex circuit comprises: capacitor C 7, resistance R 4, PIN diode D6, inductance L 4, capacitor C 9;
Wherein, described capacitor C 7 is connected between the positive pole of PIN diode D6 and the coupled end of the second electric bridge, the positive pole of PIN diode D6 is by resistance R 4 ground connection, positive pole, the second end that the first end of inductance L 4 connects PIN diode D6 are connected with the negative pole of PIN diode D6 by capacitor C 9, the minus earth of PIN diode D6;
The second end of inductance L 3, L4 connects the second output of described control voltage module.
8. radiofrequency signal phase-shift circuit according to claim 7, is characterized in that, described the 3rd signal reflex circuit also comprises: be connected to the resistance R 5 between the second end of described inductance L 3 and the second output of described control voltage module;
Described the 4th signal reflex circuit also comprises: be connected to the resistance R 6 between the second end of described inductance L 4 and the second output of described control voltage module.
9. radiofrequency signal phase-shift circuit according to claim 8, it is characterized in that, the capacitance of described capacitor C 6, C7 is 100pF, the capacitance of described capacitor C 8, C9 is 47pF, the resistance of described resistance R 3, R4 is 1200 Ω, the resistance of described resistance R 5, R6 is 100 Ω, and the pressure value of described control voltage V2 is 0 or 5v.
10. according to the radiofrequency signal phase-shift circuit described in claim 7 or 8, it is characterized in that, also comprise: for the capacitor C 10 of decoupling; Wherein, the second output of described control voltage module is by described capacitor C 10 ground connection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120332.9A CN104104351B (en) | 2013-04-08 | 2013-04-08 | Radiofrequency signal phase-shift circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310120332.9A CN104104351B (en) | 2013-04-08 | 2013-04-08 | Radiofrequency signal phase-shift circuit |
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| CN104104351A true CN104104351A (en) | 2014-10-15 |
| CN104104351B CN104104351B (en) | 2017-06-16 |
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| CN201310120332.9A Expired - Fee Related CN104104351B (en) | 2013-04-08 | 2013-04-08 | Radiofrequency signal phase-shift circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106559040A (en) * | 2015-09-25 | 2017-04-05 | 苏州普源精电科技有限公司 | The poor orthogonal phase splitter of calibration phase of output signal, modulator/demodulator and its method |
| CN111029686A (en) * | 2019-12-16 | 2020-04-17 | 南京航空航天大学 | Single-circuit double-bit phase shifter |
| CN112202443A (en) * | 2020-09-25 | 2021-01-08 | 武汉中科医疗科技工业技术研究院有限公司 | Radio frequency switch device and radio frequency switch system |
| WO2023226503A1 (en) * | 2022-05-27 | 2023-11-30 | 华为技术有限公司 | Phase shifter and communication device |
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| CN106559040A (en) * | 2015-09-25 | 2017-04-05 | 苏州普源精电科技有限公司 | The poor orthogonal phase splitter of calibration phase of output signal, modulator/demodulator and its method |
| CN111029686A (en) * | 2019-12-16 | 2020-04-17 | 南京航空航天大学 | Single-circuit double-bit phase shifter |
| CN112202443A (en) * | 2020-09-25 | 2021-01-08 | 武汉中科医疗科技工业技术研究院有限公司 | Radio frequency switch device and radio frequency switch system |
| WO2023226503A1 (en) * | 2022-05-27 | 2023-11-30 | 华为技术有限公司 | Phase shifter and communication device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104104351B (en) | 2017-06-16 |
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