CN104104351B - Radiofrequency signal phase-shift circuit - Google Patents
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- CN104104351B CN104104351B CN201310120332.9A CN201310120332A CN104104351B CN 104104351 B CN104104351 B CN 104104351B CN 201310120332 A CN201310120332 A CN 201310120332A CN 104104351 B CN104104351 B CN 104104351B
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Abstract
The present invention provides a kind of radiofrequency signal phase-shift circuit, including：First electric bridge, the first signal reflex circuit, secondary signal reflection electric circuit, the second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, control voltage module;Straight-through end, the coupled end of the first electric bridge connect the first signal reflex circuit, secondary signal reflection electric circuit respectively;Straight-through end, the coupled end of the second electric bridge connect the 3rd signal reflex circuit, the 4th signal reflex circuit respectively;The output end of the first electric bridge is connected with the input of the second electric bridge;Control voltage module output continuously controllable control voltage V1 controls the first signal reflex circuit, the reflectance factor of secondary signal reflection electric circuit, while output control voltage V2 controls the 3rd signal reflex circuit, the reflectance factor of the 4th signal reflex circuit.Above-mentioned radiofrequency signal phase-shift circuit, can be under the conditions of high frequency high bandwidth to the continuous phase modulation of radiofrequency signal being input into, and control is flexibly, insertion loss is low, passband fluctuation is small, practical.
Description
Technical field
The present invention relates to radiofrequency signal technology, more particularly to a kind of radiofrequency signal phase-shift circuit.
Background technology
Phase-shift circuit controls circuit as a kind of common signal phase, in mobile communication, phased-array radar, instrument and meter
Suffer from being widely applied Deng field.
With the development of the technologies such as spaceborne, mobile communication, volume, weight and performance to phase-shift circuit have more next
Requirement higher.Some switching regulators, loaded type, reflective, amplification type and MEMS（MEMS, Micro-
Electro-Mechanical Systems) Hong phase-shift circuits all obtain exploitation with development, these circuits are by using reactive
Element or semi-conducting material, there is respective advantage in terms of different performance requirements, application scenarios.
At present, relatively conventional phase-shift circuit is simulated reflections formula phase-shift circuit, and this circuit is mainly by reflecting electricity
Phase shift is realized on road, obtains phase place change by changing the reflectance factor of reflection electric circuit, but under the conditions of high frequency high bandwidth, this
The phase-shift circuit insertion loss of kind of structure is high, fluctuation is big, be difficult to Effective Regulation phase change, phase-adjustable scope are small.
The content of the invention
Based on this, it is necessary to regarding to the issue above, there is provided a kind of insertion loss is low, passband fluctuation is small, and Phase Continuation is adjustable
The more preferable radiofrequency signal phase-shift circuit of property.
A kind of radiofrequency signal phase-shift circuit, including：First electric bridge, the first signal reflex circuit, secondary signal reflection electric circuit,
Second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, control voltage module；
Straight-through end, the coupled end of first electric bridge connect the first signal reflex circuit, secondary signal reflection respectively
Circuit；
Straight-through end, the coupled end of second electric bridge connect the 3rd signal reflex circuit, the 4th signal reflex respectively
Circuit；
The output end of first electric bridge is connected with the input of second electric bridge, and the input of first electric bridge is
The input of radiofrequency signal phase-shift circuit, the output end of second electric bridge is the output end of radiofrequency signal phase-shift circuit；
First output end output continuously controllable control voltage V1 controls first letter of the control voltage module
Number reflection electric circuit, the reflectance factor of secondary signal reflection electric circuit, the second output end output control voltage V2 controls the 3rd letter
Number reflection electric circuit, the reflectance factor of the 4th signal reflex circuit.
Above-mentioned radiofrequency signal phase-shift circuit, using the characteristic of electric bridge, by setting two cascade electric bridges, and in two electric bridges
Straight-through end, coupled end connect signal reflex circuit respectively, constitute the phase modulation circuit of cascade, be input into the input of prime electric bridge
Radiofrequency signal, the reflectance factor of each reflection electric circuit is changed using control voltage, and Phase Continuation is obtained in the output end of rear class electric bridge
Controllable phase shift signal, can be under the conditions of high frequency high bandwidth to the continuous phase modulation of radiofrequency signal being input into, and control is flexible, insertion is damaged
Consume low, passband fluctuation small, practical.
Brief description of the drawings
Fig. 1 is the structural representation of the radiofrequency signal phase-shift circuit of one embodiment；
Fig. 2 is a structural representation for the radiofrequency signal phase-shift circuit of preferred embodiment；
Fig. 3 is a phase shift range schematic diagram for application example.
Specific embodiment
The specific embodiment to radiofrequency signal phase-shift circuit of the invention is described in detail below in conjunction with the accompanying drawings.
Shown in Figure 1, Fig. 1 shows the structural representation of the radiofrequency signal phase-shift circuit of one embodiment, main bag
Include：First electric bridge, the first signal reflex circuit, secondary signal reflection electric circuit, the second electric bridge, the 3rd signal reflex circuit, the 4th
Signal reflex circuit, control voltage module.
Straight-through end, the coupled end of first electric bridge connect the first signal reflex circuit, secondary signal reflection respectively
Circuit.
Straight-through end, the coupled end of second electric bridge connect the 3rd signal reflex circuit, the 4th signal reflex respectively
Circuit.
The output end of first electric bridge is connected with the input of second electric bridge, and the input of first electric bridge is
The input of radiofrequency signal phase-shift circuit, the output end of second electric bridge is the output end of radiofrequency signal phase-shift circuit.
First output end output continuously controllable control voltage V1 controls first letter of the control voltage module
Number reflection electric circuit, the reflectance factor of secondary signal reflection electric circuit, the second output end output control electricity of the control voltage module
Pressure V2 controls the 3rd signal reflex circuit, the reflectance factor of 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,
P3, P7 port are coupled end, and P2, P6 port are isolation end, output of P2, P6 port respectively as the first electric bridge and the second electric bridge
End.Radiofrequency signal is input into from P1 ports, enters the first signal reflex circuit, secondary signal reflection electric circuit in P3, P4 port respectively,
The first output end U1 signal reflexs of output control voltage V1 to first circuit of control voltage module, secondary signal reflection electric circuit control
Make its reflectance factor Γ1, under the control of control voltage V1, producing respectively and the two-way reflected signal of phase shift theta 1 has occurred, V1 is
Continuously controllable control voltage, the first signal reflex circuit of adjustment, the reflectance factor of secondary signal reflection electric circuit, so as to adjust
The value of phase shift theta 1, the two reflected signals are exported after P2 ports synthesize.
The radiofrequency signal exported by P2 ports enters the P5 ports of the second electric bridge, enters the 3rd letter in P7, P8 port respectively
Number reflection electric circuit, the 4th signal reflex circuit, the first output end U2 output control voltage V2 to the 3rd letters of control voltage module
Number reflection electric circuit, the 4th signal reflex circuit control its reflectance factor Γ2, under the control of control voltage V2, produce respectively
There is the two-way reflected signal of phase shift theta 2, the two reflected signals are in the P6 ports final phase shift signalling that obtains of synthesis from P6 ports
Output.
For apparent technology of the invention, the preferred of radiofrequency signal phase-shift circuit of the invention is illustrated below in conjunction with the accompanying drawings
Embodiment.
Shown in Figure 2, Fig. 2 is a structural representation for the radiofrequency signal phase-shift circuit of preferred embodiment.
In one embodiment, the first electric bridge and the second electric bridge can use 3dB90 ° of electric bridge.
In one embodiment, the first signal reflex circuit includes：Electric capacity C1, C3, two transfigurations of negative pole differential concatenation
Diode D1, D2, inductance L1.
Wherein, electric capacity C1 is connected between the positive pole of varactor D1 and the straight-through end of the first electric bridge, varactor
The positive pole of D1 is grounded by the electric capacity C3, inductance L1, the plus earth of varactor D2.
The secondary signal reflection electric circuit includes：Electric capacity C2, C4, two varactor D3, D4 of negative pole differential concatenations,
Inductance L2.
Wherein, electric capacity C2 is connected between the coupled end of the positive pole of varactor D3 and the first electric bridge, varactor
The positive pole of D3 is grounded by the electric capacity C4, inductance L2, the plus earth of varactor D4.
The negative pole of described varactor D1, D2, D3, D4 connects the first output end U1 of the control voltage module.
In above-described embodiment, the electric capacity C1 in the first signal reflex circuit is used for stopping direct current signal, and electric capacity C3 is used to adjust
Circuit linearity degree, inductance L1 is used to adjust circuit phase shift range and can provide the required direct current of varactor D1 biasings to return
Road, two varactor D1, D2 differential concatenation connections, by this connected mode, can improve the phase-adjusted linearity,
The control voltage of the first signal reflex circuit is V1, using the change of varactor D1, D2 capacitive reactance under different reverse-biased,
Realize to reflectance factor Γ1Change so that realize to be input into radiofrequency signal phase change, secondary signal reflection electric circuit
Operation principle is identical with the first signal reflex circuit.
In one embodiment, further, the first signal reflex circuit also includes being connected to the pole of the transfiguration two
Resistance R1 between the negative pole of pipe D1, D2 and the first output end U1 of the control voltage module, secondary signal reflection electric circuit is also
Including the resistance R2 being connected between the negative pole of varactor D3, D4 and the first output end U1 of control voltage module.
Further, radiofrequency signal phase-shift circuit also includes：For the electric capacity C5 for decoupling；Wherein, the control voltage mould
First output end U1 of block is grounded by electric capacity C5.
In the above-described embodiments, resistance R1, R2 is used for Access Control voltage V1 as bias voltage, generally, electricity
The value for hindering R1, R2 is equal or close with the reverse-conducting resistance of varactor D1, D2, D3, D4.It is right that resistance R1, R2 are provided
In the high resistant loop of radio frequency and smooth reflector coefficient Γ1Amplitude fluctuations, electric capacity C5 play a part of it is anti-interference, filtering.
In one embodiment, the 3rd signal reflex circuit includes：Electric capacity C6, resistance R3, PIN diode D5, electricity
Sense L3, electric capacity C8.
Wherein, the electric capacity C6 is connected between the positive pole of PIN diode D5 and the straight-through end of the second electric bridge, the poles of PIN bis-
The positive pole of pipe D5 is grounded by resistance R3, and positive pole, the second end Q2 of the first end Q1 connection PIN diodes D5 of inductance L3 are by electricity
Hold C8 to be connected with the negative pole of PIN diode D5, the negative pole ground connection of PIN diode D5.
The 4th signal reflex circuit includes：Electric capacity C7, resistance R4, PIN diode D6, inductance L4, electric capacity C9.
Wherein, the electric capacity C7 is connected between the coupled end of the positive pole of PIN diode D6 and the second electric bridge, the poles of PIN bis-
The positive pole of pipe D6 is grounded by resistance R4, and positive pole, the second end Q4 of the first end Q3 connection PIN diodes D6 of inductance L4 are by electricity
Hold C9 to be connected with the negative pole of PIN diode D6, the negative pole ground connection of PIN diode D6.
Second end Q2, Q4 of inductance L3, L4 connect the second output end U2 of the control voltage module.
In above-described embodiment, electric capacity C6, C7 are used for stopping direct current signal, and resistance R3, R4 are used for smooth reflector coefficient Γ2Width
Value fluctuation, inductance L3 and electric capacity C8 loops, inductance L4 and electric capacity C9 are used to adjusting phase modulation scope, the 3rd signal reflex circuit, the
The control voltage of four signal reflex circuits is provided by V2, is changed with resistance under zero inclined state fully on using PIN diode
Reflectance factor Γ is realized in change2Change so that realize to be input into radiofrequency signal phase change.
In one embodiment, the 3rd signal reflex circuit also include being connected to the second end Q2 of the inductance L3 with
Resistance R5 between second output end U2 of the control voltage module, the 4th signal reflex circuit also includes being connected to institute
State the resistance R6 between the second end Q4 of inductance L4 and the second output end U2 of the control voltage module.
Further, radiofrequency signal phase-shift circuit also includes：For the electric capacity C10 for decoupling；Wherein, the control voltage mould
Second output end U2 of block is grounded by the electric capacity C10.
In the above-described embodiments, resistance R5, R6 is used to provide biasing, generally, the value and PIN of resistance R5, R6
The reverse-conducting resistance of diode D5, D6 is equal or close.Electric capacity C10 plays anti-interference, filtering.
In one embodiment, the capacitance of described electric capacity C1, C2 is 100pF, and the capacitance of described electric capacity C3, C4 is 0.3pF,
The inductance value of described inductance L1, L2 is 2.7nH, and the resistance of described resistance R1, R2 is 360 Ω, the pressure value of the control voltage V1
It is 0~10v.The capacitance of electric capacity C6, C7 is 100pF, and the capacitance of described electric capacity C8, C9 is 47pF, the resistance of described resistance R3, R4
It is 1200 Ω, the resistance of described resistance R5, R6 is 100 Ω, and the pressure value of the control voltage V2 is 0 or 5v.
In the above-described embodiments, the continuous phase modulation to radiofrequency signal, example can be realized by adjusting control voltage V1, V2
Such as, V2 output 0V are first kept, while continuously adjusting V1 in 0V~10V intervals, makes radiofrequency signal phase change more than 180 °, then
V2 outputs are adjusted to 5V, 180 ° of phase bit flipping can be made, at this moment continuously adjust V1 in 0V~10V intervals again, phase can again changed
Become 180 °, so as to the phase shift of 360 ° of radiofrequency signal can be realized.
In an application example, by the radiofrequency signal phase-shift circuit of above-mentioned parameter, by adjust control voltage V1,
V2, as shown in figure 3, Fig. 3 is a phase shift range schematic diagram for application example, phase-shift circuit realizes more than 360 ° of continuous phase
Move, its performance indications is 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 invention can realize that all devices use surface using micro-strip hybrid integration technology
The mode for pasting weldering is welded on microstrip transmission line（The Ω of characteristic impedance 50）Dielectric-slab on.Wherein, 3dB90 ° of electric bridge can be with root
Selected according to indexs such as required working frequency range, bandwidth, Insertion Loss, phase fluctuations.For example, Anaren companies can be selected
1P603.Varactor can select the SMV1249 of Skyworks companies；PIN diode can select Avago companies
HSMP-4810。
The radiofrequency signal phase-shift circuit of above-described embodiment, make use of the 3dB90 ° of characteristic of electric bridge, varactor PN junction electricity
The principle of appearance, PIN diode conducting resistance and its bias voltage dependence, by two the 90 of 3dB ° of electric bridges, two PIN bis-
Pole pipe and four varactors, constitute a kind of reflective level that continuous phase modulation can be realized under the conditions of high frequency high bandwidth
Joint debugging circuitry phase, when the radiofrequency signal of required frequency range is input into, by suitably adjusting control voltage V1, V2, to realize 360 °
The phase shift of interior any number of degrees, can apply in the case of high frequency high bandwidth, achieve over 360 ° of phase shift, and Insertion Loss is low, fluctuation is small, and
Control is flexible, it is convenient, practical to realize, there is extensive in the electronic systems such as mobile communication, Aero-Space, radar electronic warfare
Application prospect.
It is to be understood that, in radiofrequency signal phase-shift circuit of the invention, the first electric bridge, the second electric bridge are not limited to
The type illustrated in above preferred embodiment, it would however also be possible to employ other types of electric bridge.First signal reflex circuit, secondary signal
It is anti-that reflection electric circuit, the 3rd signal reflex circuit, the 4th signal reflex circuit are not limited to illustrate in above preferred embodiment
Radio line structure, it would however also be possible to employ the achievable signal for being reflected input radio frequency and can adjust reflectance factor of other forms
Reflection electric circuit.
Embodiment described above only expresses several embodiments of the invention, and its description is more specific and detailed, but simultaneously
Therefore the limitation to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for one of ordinary skill in the art
For, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to guarantor of the invention
Shield scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (7)
1. a kind of radiofrequency signal phase-shift circuit, it is characterised in that including：First electric bridge, the first signal reflex circuit, secondary signal
Reflection electric circuit, the second electric bridge, the 3rd signal reflex circuit, the 4th signal reflex circuit, control voltage module；First electric bridge
It is 3dB90 ° of electric bridge with the second electric bridge；
Straight-through end, the coupled end of first electric bridge connect the first signal reflex circuit, secondary signal reflection electric circuit respectively；
Straight-through end, the coupled end of second electric bridge connect the 3rd signal reflex circuit, the 4th signal reflex circuit respectively；
The output end of first electric bridge is connected with the input of second electric bridge, and the input of first electric bridge is radio frequency
The input of signal phase-shift circuit, the output end of second electric bridge is the output end of radiofrequency signal phase-shift circuit；
The first signal reflex circuit includes：Electric capacity C1, C3, two varactor D1, D2 of negative pole differential concatenations, inductance
L1；Wherein, electric capacity C1 is connected between the positive pole of varactor D1 and the straight-through end of the first electric bridge, and varactor D1 is just
Pole is grounded by the electric capacity C3, inductance L1, the plus earth of varactor D2；
The secondary signal reflection electric circuit includes：Electric capacity C2, C4, two varactor D3, D4 of negative pole differential concatenations, inductance
L2；Wherein, electric capacity C2 is connected between the coupled end of the positive pole of varactor D3 and the first electric bridge, and varactor D3 is just
Pole is grounded by the electric capacity C4, inductance L2, the plus earth of varactor D4；Described varactor D1, D2, D3, D4
Negative pole connect the first output end of the control voltage module；
The 3rd signal reflex circuit includes：Electric capacity C6, resistance R3, PIN diode D5, inductance L3, electric capacity C8；Wherein, institute
State electric capacity C6 to be 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 electricity
Resistance R3 ground connection, positive pole, second end of the first end connection PIN diode D5 of inductance L3 are by electric capacity C8's and PIN diode D5
Negative pole is connected, the negative pole ground connection of PIN diode D5；
The 4th signal reflex circuit includes：Electric capacity C7, resistance R4, PIN diode D6, inductance L4, electric capacity C9；Wherein, institute
State electric capacity C7 to be connected between the coupled end of the positive pole of PIN diode D6 and the second electric bridge, the positive pole of PIN diode D6 is by electricity
Resistance R4 ground connection, positive pole, second end of the first end connection PIN diode D6 of inductance L4 are by electric capacity C9's and PIN diode D6
Negative pole is connected, the negative pole ground connection of PIN diode D6；The second of the second end connection control voltage module of inductance L3, L4 is defeated
Go out end；
The first output end output continuously controllable control voltage V1 of the control voltage module controls first signal anti-
The reflectance factor of transmit-receive radio road, secondary signal reflection electric circuit, the second output end output control voltage V2 controls the 3rd signal anti-
The reflectance factor of transmit-receive radio road, the 4th signal reflex circuit；
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, P2, P6 port is isolation end, and P2, P6 port are respectively as the first electric bridge and the output end of the second electric bridge；Radiofrequency signal
From the input of P1 ports, enter the first signal reflex circuit, secondary signal reflection electric circuit, control voltage mould in P3, P4 port respectively
The first output end U1 signal reflexs of output control voltage V1 to first circuit of block, secondary signal reflection electric circuit control its reflection system
Number Γ1, under the control of control voltage V1, producing respectively and the two-way reflected signal of phase shift theta 1 has occurred, V1 is continuously to adjust
Control voltage, adjustment the first signal reflex circuit, the reflectance factor of secondary signal reflection electric circuit, so as to adjust phase shift theta 1
Value, the two reflected signals are exported after P2 ports synthesize；
The radiofrequency signal exported by P2 ports enters the P5 ports of the second electric bridge, and it is anti-to enter the 3rd signal in P7, P8 port respectively
Transmit-receive radio road, the 4th signal reflex circuit, the first output end U2 signals of output control voltage V2 to the 3rd of control voltage module are anti-
Transmit-receive radio road, the 4th signal reflex circuit control its reflectance factor Γ2, under the control of control voltage V2, produce occurred respectively
The two-way reflected signal of phase shift theta 2, the two reflected signals are defeated from P6 ports in the final phase shift signalling that the synthesis of P6 ports is obtained
Go out.
2. radiofrequency signal phase-shift circuit according to claim 1, it is characterised in that the first signal reflex circuit is also wrapped
Include：It is connected to the resistance R1 between the first output end of the negative pole of described varactor D1, D2 and the control voltage module；
The secondary signal reflection electric circuit also includes：It is connected to the negative pole and the control voltage of described varactor D3, D4
Resistance R2 between first output end of module.
3. radiofrequency signal phase-shift circuit according to claim 2, it is characterised in that the capacitance of described electric capacity C1, C2 is
The capacitance of 100pF, described electric capacity C3, C4 is 0.3pF, and the inductance value of described inductance L1, L2 is 2.7nH, described resistance R1, R2's
Resistance is 360 Ω, and the pressure value of the control voltage V1 is 0~10v.
4. the radiofrequency signal phase-shift circuit according to Claims 2 or 3, it is characterised in that also include：For the electric capacity for decoupling
C5；Wherein, the first output end of the control voltage module is grounded by electric capacity C5.
5. radiofrequency signal phase-shift circuit according to claim 1, it is characterised in that the 3rd signal reflex circuit is also wrapped
Include：It is connected to the resistance R5 between the second output end of second end of the inductance L3 and the control voltage module；
The 4th signal reflex circuit also includes：It is connected to second end and the of the control voltage module of the inductance L4
Resistance R6 between two output ends.
6. radiofrequency signal phase-shift circuit according to claim 5, it is characterised in that the capacitance of described electric capacity C6, C7 is
The capacitance of 100pF, described electric capacity C8, C9 is 47pF, and the resistance of described resistance R3, R4 is 1200 Ω, the resistance of described resistance R5, R6
It is 100 Ω to be worth, and the pressure value of the control voltage V2 is 0 or 5v.
7. the radiofrequency signal phase-shift circuit according to claim 5 or 6, it is characterised in that also include：For the electric capacity for decoupling
C10；Wherein, the second output end of the control voltage module is grounded by the electric capacity C10.
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| CN201310120332.9A CN104104351B (en) | 2013-04-08 | 2013-04-08 | Radiofrequency signal phase-shift circuit |
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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 |
| CN111029686B (en) * | 2019-12-16 | 2021-07-20 | 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 |
| CN117175164A (en) * | 2022-05-27 | 2023-12-05 | 华为技术有限公司 | Phase shifter and communication device |
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| CN104104351A (en) | 2014-10-15 |
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