CN110474610A - A kind of vector modulator - Google Patents
A kind of vector modulator Download PDFInfo
- Publication number
- CN110474610A CN110474610A CN201910607613.4A CN201910607613A CN110474610A CN 110474610 A CN110474610 A CN 110474610A CN 201910607613 A CN201910607613 A CN 201910607613A CN 110474610 A CN110474610 A CN 110474610A
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- port
- modulation
- coupler
- signal
- vector modulator
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Classifications
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/08—Amplitude modulation by means of variable impedance element
- H03C1/14—Amplitude modulation by means of variable impedance element the element being a diode
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03C—MODULATION
- H03C1/00—Amplitude modulation
- H03C1/52—Modulators in which carrier or one sideband is wholly or partially suppressed
- H03C1/54—Balanced modulators, e.g. bridge type, ring type or double balanced type
- H03C1/56—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only
- H03C1/58—Balanced modulators, e.g. bridge type, ring type or double balanced type comprising variable two-pole elements only comprising diodes
Abstract
The present invention provides a kind of vector modulator, comprising: an input coupler, is 90 ° of couplers, and tool is set as generating the orthogonal signal of two-way there are two signal output end；One output coupler is 90 ° of couplers, and there are two signal input parts for tool, are set as synthesizing two paths of signals into signal all the way；With a modulation module, including two modulation couplers being respectively arranged between one of them described signal output end and one of them described signal input part, the signal for being set as orthogonal to two-way carries out the adjusting of amplitude and phase.The input/output coupler of vector modulator of the invention is all made of 90 ° of couplers, and phase is compensated using delay transmission line in modulation module, to reduce the number of devices of modulator, save a half-coupler, solve the problems, such as that current vector modulator area occupied is big, symmetrical balance modulation is realized simultaneously, achievees the effect that similar double flat weighs.
Description
Technical field
The invention belongs to information technologies and radio frequency arts, and in particular to a kind of vector modulator.
Background technique
In Modern Communication System, vector modulator plays very important effect.In interference offset device and Linear Power Amplifier
In applying, need to realize the accurate adjustment to signal amplitude and phase using vector modulator to reach specified requirement.
It generally for the vector adjustment realized to signal, is realized by the superposition of two-way orthogonal signalling.It is existing
Vector modulator will usually be realized, existing dual balanced structure tool to realize that symmetrical balance is modulated using dual balanced structure
Body is formed in parallel by two symmetrical single-balanced structures, and input uses 90 degree of couplers, and output uses power combiner.This
It will lead to and need two single-balanced structures, so as to cause a large amount of duplicate couplers are needed, increase circuit area.
Therefore, how to reduce circuit area to realize the problem of full balance is modulated into for this field urgent need to resolve.
Summary of the invention
The present invention is intended to provide a kind of vector modulator occupies face so that the use number of devices of vector modulator is few
Product is small.
To achieve the goals above, the present invention provides a kind of vector modulator, comprising: an input coupler, for 90 ° of couplings
Device, tool are set as generating the orthogonal signal of two-way there are two signal output end；One output coupler, for 90 ° of couplings
Device, there are two signal input parts for tool, are set as synthesizing two paths of signals into signal all the way；With the modulation mould of a symmetrical configuration
Block, including the first modulation being respectively arranged between one of them described signal output end and one of them described signal input part
Coupler and the second modulation coupler, the signal for being set as orthogonal to two-way carry out the adjusting of amplitude and phase.
The first modulation coupler has the first modulation port being connected by transmission line, the second modulation port and passes through
The connected third modulation port of transmission line, the 4th modulation port, the first modulation port are connected with one first variable impedance module, the
Two modulation ports are connected with the signal output end of the input coupler, the signal input of third modulation port and output coupler
End is connected, and the 4th modulation port is connected with one second variable impedance module；And it is described second modulation coupler have pass through transmission
The 7th modulation port, the 8th modulation port that the 5th connected modulation port of line, the 6th modulation port are connected with by transmission line,
5th modulation port is connected with a third variable impedance module, the signal output end of the 6th modulation port and the input coupler
It is connected, the 7th modulation port is connected with the signal input part of output coupler, the 8th modulation port and one the 4th variable impedance mould
Block is connected.
The first, second, third and fourth variable impedance module includes PIN diode and DC source, the PIN bis-
The impedance of pole pipe is modulated by adjusting the voltage of the DC source.
The first, second, third and fourth variable impedance module includes capacitor and inductance, the PIN diode, electricity
Hold, DC source and inductance are sequentially connected and are formed into a loop, the tie point ground connection of the PIN diode and capacitor, described first, the
Two, the third and fourth variable impedance module respectively by the tie point of its inductance and PIN diode come with first modulated terminal
Mouth, the 4th modulation port, the 5th modulation port are connected with the 8th modulation port.
First modulation port is connected by one first transmission delay line with the first variable impedance module, and the 8th
Modulation port is connected by one second transmission delay line with the 4th variable impedance module；Or the 4th modulation port passes through
One first transmission delay line is connected with the second variable impedance module, and the 8th modulation port is prolonged by one second transmission
Slow line is connected with the 4th variable impedance module.
The first transmission delay line and the second transmission delay line are 1/8th wavelength transmission lines.
There is the input coupler first port being connected by transmission line, second port to be connected with by transmission line
Third port, the 4th port, the second port, third port are the signal output end；And output coupler is with logical
Cross the connected fifth port of transmission line, the 7th port, the 8th port that the 6th port is connected with by transmission line, the 5th end
Mouth, the 8th port are the signal input part.
The first port is connected with an input signal, and the 6th port is connected with an output port.
4th port is grounded by a first resistor, and the 7th port is grounded by a second resistance.
The input coupler, output coupler, the first modulation coupler and the second modulation coupler are all made of multilayer coupling
Close structure.
The input/output coupler of vector modulator of the invention is all made of 90 ° of couplers, and uses in modulation module
Postpone transmission line to compensate phase, to reduce the number of devices of modulator, saves a half-coupler, solve current arrow
The big problem of modulator area occupied is measured, while realizing symmetrical balance modulation, achievees the effect that similar double flat weighs.In addition, this
For the modulation coupler of the vector modulator of invention using PIN diode as variable impedance, the impedance of PIN diode passes through adjusting
The voltage of DC source is modulated, and then controls the amplitude phase modulation of signal, and full angle adjusting may be implemented.
Detailed description of the invention
Fig. 1 is the circuit diagram according to the vector modulator of one embodiment of the present of invention；
Fig. 2 is the output planisphere according to the vector modulator of one embodiment of the present of invention.
Specific embodiment
Present invention will be further explained below with reference to specific examples.It should be understood that these embodiments are merely to illustrate the present invention
Rather than it limits the scope of the invention.In addition, it should also be understood that, after reading the content taught by the present invention, those skilled in the art
Member can make various changes or modifications the present invention, and such equivalent forms equally fall within the application the appended claims and limited
Range.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
As shown in Figure 1 for according to the vector modulator of one embodiment of the present of invention comprising an input coupler N1, it should
Input coupler N1 is 90 ° of couplers, and tool is set as generating the orthogonal signal of two-way there are two signal output end；One
Output coupler N2, output coupler N2 are 90 ° of couplers, and there are two signal input parts for tool, are set as two paths of signals
Synthesize signal all the way；With the modulation module 100 of a symmetrical configuration, for carrying out amplitude and phase to the orthogonal signal of two-way
The adjusting of position.
Wherein, the input coupler N1 is four port elements, has the first port 11 being connected by transmission line, the
Third port 13 that Two-port netwerk 12 is connected with by transmission line, the 4th port 14, shape coupling in 90 ° between direct-through line and coupling line
It closes.First port 11 is connected with an input signal Vin, the 4th port 14 by a first resistor R1 be grounded and second port 12,
Third port 13 is the signal output end.As a result, input coupler N1 generate 90 ° of two paths of signals it is orthogonal.Wherein, first
Port 11 is defined as input port, and second port 12 is defined as straight-through port, and third port 13 is defined as coupling port, the 4th end
Mouth 14 is defined as isolated port.
The structure of output coupler N2 is identical as the structure of input coupler N1, has the 5th to be connected by transmission line
The 7th port 23, the 8th port 24 that port 21, the 6th port 22 are connected with by transmission line, the fifth port the 21, the 8th
Port 24 is the signal input part, and the 6th port 22 of the output coupler N2 is connected with an output port, and the 7th
Port 23 is grounded by a second resistance R2.
Modulation module 100 includes the one of signal output end and output coupler for being respectively arranged at input coupler N1
The first modulation coupler N3 and the second modulation coupler N4 between one of signal input part of N2.
The first modulation coupler N3 has the first modulation port 31, the second modulation port 32 being connected by transmission line
Third modulation port 33, the 4th modulation port 34 being connected with by transmission line, the first modulation port 31 and one first can variable resistance
Anti- module 101 is connected, and the second modulation port 32 is connected with the second port 12 of the input coupler N1, third modulation port 33
It is connected with the fifth port 21 of output coupler N2, the 4th modulation port 34 is connected with one second variable impedance module 102, by
This, by third variable impedance module 103 and the 4th variable impedance module 104 to wherein signal carries out amplitude-phase tune all the way
Section.
The second modulation coupler N4 has the 5th modulation port 41, the 6th modulation port 42 being connected by transmission line
The 7th modulation port 43, the 8th modulation port 44 being connected with by transmission line, the 5th modulation port 41 and a third can variable resistances
Anti- module 103 is connected, and the 6th modulation port 42 is connected with the third port 13 of the input coupler N1, the 7th modulation port 43
It is connected with the 8th port 24 of output coupler N2, the 8th modulation port 44 can by one second transmission delay line M2 and one the 4th
Impedance module 104 is connected, as a result, by third variable impedance module 103 and the 4th variable impedance module 104 to therein another
Signal carries out amplitude-phase adjusting all the way.
First, second, third and fourth variable impedance module 101,102,103,104 includes being sequentially connected and being formed back
The tie point ground connection of the PIN diode P on road, capacitor C, DC source V and inductance L, the PIN diode P and capacitor C, described the
One, second, third and the 4th variable impedance module 101,102,103,104 pass through the company of its inductance L and PIN diode P respectively
Contact to be connected with first modulation port 31, the 4th modulation port 34, the 5th modulation port 41 and the 8th modulation port 44.
Wherein, capacitor C and inductance L is set as being biased control to PIN diode P, guarantees that external control signal is loaded onto bis- pole PIN
Pipe P, and radiofrequency signal is prevented to reveal, influences the impedance of PIN diode P, and the size of inductance L and capacitor C have no strict demand, only
Guarantee that signal does not leak.DC source V can be controlled by outside, for changing the impedance of PIN diode P.Variable impedance as a result,
Module 101,102,103,104 is all made of PIN diode as variable impedance, and the impedance of PIN diode P is by adjusting DC source
The voltage of V is modulated, and then controls the amplitude phase modulation of signal.
The first transmission delay line M1 and the second transmission delay line M2 is 1/8th wavelength transmission lines.In addition, by
The first port 11 of input coupler N1 is set in transmission delay line and the effect of first port 14 is arranged in transmission delay line
Itself is not different, but the structure that the first modulation coupler N3 and second must be made to modulate coupler N4 keeps symmetry, because
This, the first transmission delay line M1 also can be set between the 4th modulation port 34 and the second variable impedance module 102, and at this time
Two transmission delay line M2 are arranged between the 5th modulation port 41 and third variable impedance module 103.
The input coupler N1, output coupler N2, the first modulation coupler N3 and the second modulation coupler N4 are adopted
With multi-layer-coupled structure.
The working principle of vector modulator of the invention is sketched below with reference to Fig. 1.For Vector Modulation as shown in Figure 1
Device carries out Orthogonal Decomposition, the two-way normalized signal that input coupler N1 is exported to input signal by input coupler N1
PDIR_IN, PCP_INIt is respectively as follows:
When two paths of signals passes through the modulation coupler N4 of the first modulation coupler N3 and second respectively, transmission delay line is (i.e.
/ 8th wavelength transmission lines) it is added in the first modulation port 31 and the second modulation coupler N4 of the first modulation coupler N3 respectively
The 8th modulation port 44, this two sections of transmission delay lines introduce 90 ° of phase shifts in reflection signal, and the size of reflection coefficient is
By the control of DC source V size, therefore, obtained two-way normalized output signal PDIR_OUT, PCP_OUTIt is respectively as follows:
Wherein, ΓQD,ΓID,ΓIC,ΓQCBe respectively the first, second, third and fourth variable impedance module 101,102,
103, the reflection coefficient of 104 PIN diode P.
After the output signal of the first modulation coupler N3 and the second modulation coupler N4 enter output coupler N2 as a result,
The combining output signal P exportedOUTAre as follows:
Wherein, ΓQD,ΓID,ΓIC,ΓQCBe respectively the first, second, third and fourth variable impedance module 101,102,
103, the reflection coefficient of 104 PIN diode P.
Therefore, vector modulator of the invention realizes full angle adjusting.The output signal of vector modulator of the invention
Planisphere as shown in Fig. 2, it is polar diagram, the amplitude with phase of the position of each point just represent one of letter on figure
Number amplitude and phase modulated illustrate that vector modulator of the invention can be realized full angle tune as soon as 360 degree of circle cover
Section.
Above-described, only presently preferred embodiments of the present invention, the range being not intended to limit the invention, of the invention is upper
Stating embodiment can also make a variety of changes.Made by i.e. all claims applied according to the present invention and description
Simply, equivalent changes and modifications fall within the claims of the invention patent.The not detailed description of the present invention is
Routine techniques content.
Claims (10)
1. a kind of vector modulator characterized by comprising
One input coupler (N1) is 90 ° of couplers, and there are two signal output ends for tool, and it is orthogonal to be set as generation two-way
Signal；
One output coupler (N2) is 90 ° of couplers, and there are two signal input parts for tool, are set as synthesizing two paths of signals
Signal all the way；With
The modulation module (100) of one symmetrical configuration, including it is respectively arranged at one of them described signal output end and one of them
Coupler (N4) is modulated in the first modulation coupler (N3) and second between the signal input part, is set as to two-way each other just
The signal of friendship carries out the adjusting of amplitude and phase.
2. vector modulator according to claim 1, which is characterized in that first modulation coupler (N3), which has, to be passed through
The third modulation port that connected the first modulation port (31) of transmission line, the second modulation port (32) are connected with by transmission line
(33), the 4th modulation port (34), the first modulation port (31) are connected with one first variable impedance module (101), the second modulation
Port (32) is connected with the signal output end of the input coupler (N1), third modulation port (33) and the output coupler
(N2) signal input part is connected, and the 4th modulation port (34) is connected with one second variable impedance module (102)；
And second modulation coupler (N4) has the 5th modulation port (41), the 6th modulation port being connected by transmission line
(42) the 7th modulation port (43), the 8th modulation port (44) being connected with by transmission line, the 5th modulation port (41) and one
Third variable impedance module (103) is connected, the signal output end phase of the 6th modulation port (42) and the input coupler (N1)
Even, the 7th modulation port (43) is connected with the signal input part of output coupler (N2), the 8th modulation port (44) and one the 4th
Variable impedance module (104) is connected.
3. vector modulator according to claim 2, which is characterized in that described first, second, third and fourth can variable resistance
Anti- module (101,102,103,104) includes PIN diode (P) and DC source (V), and the impedance of the PIN diode (P) is logical
The voltage of the DC source (V) is overregulated to modulate.
4. vector modulator according to claim 3, which is characterized in that described first, second, third and fourth can variable resistance
Anti- module (101,102,103,104) includes capacitor (C) and inductance (L), the PIN diode (P), capacitor (C), DC source
(V) it is sequentially connected and is formed into a loop with inductance (L), the tie point of the PIN diode (P) and capacitor (C) ground connection, described the
One, second, third and the 4th variable impedance module (101,102,103,104) pass through its inductance (L) and PIN diode respectively
(P) tie point adjusts with first modulation port (31), the 4th modulation port (34), the 5th modulation port (41) and the 8th
Port (44) processed is connected.
5. vector modulator according to claim 2, which is characterized in that first modulation port (31) passes through one first
Transmission delay line (M1) is connected with the first variable impedance module (101), and the 8th modulation port (44) is passed by one second
Defeated delay line (M2) is connected with the 4th variable impedance module (104)；Or the 4th modulation port (34) passes through one first
Transmission delay line (M1) is connected with the second variable impedance module (102), and the 8th modulation port (44) passes through one the
Two transmission delay lines (M2) are connected with the 4th variable impedance module (104).
6. vector modulator according to claim 5, which is characterized in that the first transmission delay line (M1) and second passes
Defeated delay line (M2) is 1/8th wavelength transmission lines.
7. vector modulator according to claim 1, which is characterized in that the input coupler (N1), which has, passes through transmission
Third port (13) that the connected first port (11) of line, second port (12) are connected with by transmission line, the 4th port (14),
The second port (12), third port (13) are the signal output end；
And output coupler (N2) has the fifth port (21) being connected by transmission line, the 6th port (22) and passes through transmission line
Connected the 7th port (23), the 8th port (24), the fifth port (21), the 8th port (24) are the signal input
End.
8. vector modulator according to claim 7, which is characterized in that the first port (11) and an input signal phase
Even, the 6th port (22) is connected with an output port.
9. vector modulator according to claim 8, which is characterized in that the 4th port (14) passes through a first resistor
(R1) it is grounded, and the 7th port (23) is grounded by a second resistance (R2).
10. vector modulator according to claim 1, which is characterized in that the input coupler (N1), output coupler
(N2), the first modulation coupler (N3) and the second modulation coupler (N4) are all made of multi-layer-coupled structure.
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| CN201910607613.4A CN110474610A (en) | 2019-07-04 | 2019-07-04 | A kind of vector modulator |
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| CN201910607613.4A CN110474610A (en) | 2019-07-04 | 2019-07-04 | A kind of vector modulator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113589233A (en) * | 2021-07-21 | 2021-11-02 | 东南大学 | S-band high-power double-balanced vector modulator based on PIN diode and control method thereof |
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Application publication date: 20191119 |