CN101741339B - Broadband quadrature phase shifter - Google Patents
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- CN101741339B CN101741339B CN2009102387003A CN200910238700A CN101741339B CN 101741339 B CN101741339 B CN 101741339B CN 2009102387003 A CN2009102387003 A CN 2009102387003A CN 200910238700 A CN200910238700 A CN 200910238700A CN 101741339 B CN101741339 B CN 101741339B
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- phase shifter
- resistance
- quadrature phase
- electric capacity
- line transformer
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Abstract
The invention provides a broadband quadrature phase shifter which comprises a first transmission line transformer, a second first transmission line transformer, a first capacitor, a second capacitor, a first resistor and a second resistor; two secondary windings of the first transmission line transformer are connected end to end and grounded; two secondary windings of the second transmission line transformer are connected end to end and grounded; the upper end of the primary winding of the first transmission line transformer is grounded; the lower end of the primary winding of the second transmission line transformer is grounded; the primary winding of the first transmission line transformer is connected with the first capacitor and the first resistor in series in sequence to form a closed loop, and the sharing end of the first capacitor and the first resistor is connected with the first output end of the quadrature phase shifter; the secondary windings of the second transmission line transformer are connected with the second capacitor and the second resistor in series in sequence to form a closed loop, and the sharing end of the second capacitor and the second resistor is connected with the second output end of the quadrature phase shifter. Due to transmitting signals of wide frequency range, the transmission line transformers can be used as phase inverter circuits to realize quadrature phase shift of broadband signals.
Description
Technical field
The present invention relates to the signal transformation technical field, particularly a kind of broadband quadrature phase shifter.
Background technology
At first introduce several technical terms of several this areas:
Phase-shift phase: phase shifter carries out exporting the phase difference value between signal and the input signal after the phase shift to input signal.
The quadrature phase shift: it is 90 ° phase shift that phase shifter carries out phase-shift phase with input signal.
The quadrature precision: phase-shift phase departs from 90 ° error amount.
Phase inverter: a kind of circuit that two outputs are arranged, its two output signal frequency are identical with waveform, and phase place is opposite, is 0 ° like an end phase of output signal, other end phase of output signal is 180 °; Or an end phase of output signal is-90 °, and other end phase of output signal is+90 °.
At present, quadrature phase shifter both domestic and external all adopts the method for traditional absolute phase shift, is about to keep original phase place with a road in the two paths of signals of frequency homophase, and 90 ° of another road phase shifts are so that the two realizes quadrature phase shift.
In infinitely great (the so requirement in theory of quadrature phase shifter output open circuit or its load impedance; Get final product for 10 times greater than its input impedance on the engineering) assumed condition under, the output phase shift formula of the pin network phase shifter that is made up of an inductance and two electric capacity is: φ=2sin
-1(f
o/ f
c), f wherein
oBe operating frequency, f
cBe loop natural resonance frequency (numerical value that depends on inductance L and capacitor C).
Under same assumed condition, the phase shift formula of the RC phase shifter that is made up of an electric capacity and resistance is: the output signal is taken under the situation of electric capacity (promptly exporting over the ground at an end of electric capacity) and is φ
1=-arctg ω
cC
1R
1The output signal is taken from and is φ under the situation of resistance (promptly exporting over the ground at an end of resistance)
2=2arctg (1/ ω
cC
2R
2), ω wherein
c=2 π f
c, f
cBe operating frequency.
This shows; Which kind of phase shifter no matter, as long as the phase-shift phase of phase shift has been selected the loop components and parts as required, then phase-shift phase of its output signal all will become with operating frequency; Just for a broadband signal, the phase-shift phase of its all frequency components is different.With the RC phase shifter is example, according to phase shift formula φ
1=-arctg ω
cC
1R
1Calculate, it is-90 ° that centre frequency 70MHz goes up phase-shift phase, and the last phase-shift phase of 60MHz is-98.8 °, and the last phase-shift phase of 80MHz is-82.36 °.It is thus clear that 16.5 ° of the phase differences of interior highest frequency component of working band and lowest frequency components.Mobile communication signal is broadband signal, and frequency spectrum is wide, and the frequency component of its high low side is through absolute phase shifter phase shift, and phase difference each other is very big.Therefore, the method for this absolute phase shift can only be used for the single-frequency phase shift, or allows the occasion of the narrow spectrum signal phase shift of less distortion spectrum, and is not suitable for the quadrature phase shift in broadband.
Summary of the invention
The technical problem that the present invention will solve provides a kind of broadband quadrature phase shifter, can realize the quadrature phase shift in the broadband signal frequency range.
The embodiment of the invention provides a kind of broadband quadrature phase shifter, comprising: first line transformer, second line transformer, first electric capacity, second electric capacity, first resistance and second resistance;
The end to end ground connection of two secondary winding of said first line transformer; The end to end ground connection of two secondary winding of said second line transformer;
The upper end ground connection of the elementary winding of said first line transformer, the lower end connects input signal, the lower end ground connection of the elementary winding of said second line transformer, the upper end connects input signal; The upper end that the pairing end of the same name in the upper end of said first transmission line and the elementary winding of second line transformer is a secondary winding separately.
Connect successively said first electric capacity and said first resistance of the secondary winding of said first line transformer constitutes the closed-loop path, and the common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter;
Connect successively said second electric capacity and said second resistance of the secondary winding of said second line transformer constitutes the closed-loop path, and the common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter.
Preferably, the lower end of the elementary winding of said first line transformer is connected input signal through first coupling capacitance with first emitter follower successively;
The upper end of the elementary winding of said second line transformer is connected said input signal through second coupling capacitance with said first emitter follower successively.
Preferably, the upper end of the elementary winding of said second line transformer in the lower end of the elementary winding of said first line transformer all is connected input signal through first coupling capacitance with first emitter follower successively.
Preferably, the common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter, is specially:
The common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter successively with second emitter follower through the 3rd coupling capacitance of series connection.
Preferably, the common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter, is specially:
The common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter successively with the 3rd emitter-base bandgap grading follower through the 4th coupling capacitance of series connection.
Preferably, the two ends of said first electric capacity parallel connection first tunable capacitor; And/or, two ends parallel connection second tunable capacitor of said second electric capacity.
The embodiment of the invention also provides a kind of broadband quadrature phase shifter, comprising: the 3rd line transformer, the 3rd electric capacity, the 4th electric capacity, the 3rd resistance and the 4th resistance;
The end to end ground connection of two secondary winding of said the 3rd line transformer; The lower end ground connection of the elementary winding of said the 3rd line transformer;
Connect successively said the 3rd resistance and said the 3rd electric capacity of the secondary winding of said the 3rd line transformer constitutes the closed-loop path;
The common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter;
Connect successively said the 4th electric capacity and said the 4th resistance of the secondary winding of said the 3rd line transformer constitutes the closed-loop path;
The common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter.
Preferably, the upper end of the elementary winding of said the 3rd line transformer is connected input signal through the 5th coupling capacitance with the 4th emitter follower successively.
Preferably, the common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter, is specially:
The common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter successively with the 5th emitter follower through the 6th coupling capacitance of series connection.
Preferably, the common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter, is specially:
The common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter successively with the 6th emitter follower through the 7th coupling capacitance of series connection.
Preferably, the two ends of said the 3rd electric capacity parallel connection the 3rd tunable capacitor; And/or, two ends parallel connection the 4th tunable capacitor of said the 4th electric capacity.
Compared with prior art, the present invention has the following advantages:
The broadband quadrature phase shifter that the embodiment of the invention provides utilizes line transformer composition phase inverter and forms phase shifter by resistance and electric capacity.Because line transformer can the very wide signal of transmission frequency, therefore can realize the quadrature phase shift of broadband signal as phase inverter.This broadband quadrature phase shifter is formed two relative phase shifters by resistance and electric capacity; Because the phase shift and the characteristic between the frequency of two phase shifters are straight lines parallel to each other basically that one group of phase-shift phase reduces with increase frequency; So output signal mutually orthogonal of such two phase shifters; Not only the quadrature precision is high; And in the frequency range of technical indicator regulation, can both keep quadrature between the signal of the respective frequencies of two phase shifter outputs, its quadrature precision does not receive the influence of frequency, different frequency signals between phase displacement error little.
Description of drawings
Fig. 1 is broadband quadrature phase shifter embodiment one structure chart provided by the invention;
Fig. 2 is broadband quadrature phase shifter embodiment two structure charts provided by the invention;
Fig. 3 is broadband quadrature phase shifter embodiment three structure charts provided by the invention;
Fig. 4 is broadband quadrature phase shifter embodiment four structure charts provided by the invention;
Fig. 5 is broadband quadrature phase shifter embodiment five structure charts provided by the invention;
Fig. 6 is broadband quadrature phase shifter embodiment six structure charts provided by the invention;
Fig. 7 is broadband quadrature phase shifter embodiment seven structure charts provided by the invention.
Embodiment
For make above-mentioned purpose of the present invention, feature and advantage can be more obviously understandable, does detailed explanation below in conjunction with the accompanying drawing specific embodiments of the invention.
Referring to Fig. 1, this figure is broadband quadrature phase shifter embodiment one structure chart provided by the invention.
The broadband quadrature phase shifter that present embodiment provides comprises: the first line transformer T1, the second line transformer T2, first capacitor C 1, second capacitor C 2, first resistance R 1 and second resistance R 2.
The end to end ground connection of two secondary winding of the said first line transformer T1.The end to end ground connection of two secondary winding of the said second line transformer T2.
Because the end to end ground connection of secondary winding, therefore the first line transformer T1 and the second line transformer T2 have all formed phase inverter.
The upper end ground connection of the elementary winding of the said first line transformer T1, the lower end ground connection of the elementary winding of the said second line transformer T2.
The secondary winding of the said first line transformer T1 connect successively said first capacitor C 1 and said first resistance R 1 formation closed-loop path, the common port of said first capacitor C 1 and first resistance R 1 is connected first output terminals A of quadrature phase shifter.
The secondary winding of said second line transformer 2 connect successively said second capacitor C 2 and said second resistance R 2 formation closed-loop paths, the common port of said second capacitor C 2 and second resistance R 2 is connected the second output B of quadrature phase shifter.
The lower end of the elementary winding of the said first line transformer T1 connects input signal.
The upper end of the elementary winding of the said second line transformer T2 connects input signal.
Need to prove that the embodiment of the invention does not limit first output terminals A of quadrature phase shifter and the concrete phase place of the second output B, as long as the difference or the sum of first output terminals A and the second output B signal are 90 °.For example, the signal of first output terminals A is-45 °, and the signal of the second output B is+45 °.
First output terminals A is identical with the two paths of signals frequency of second output B output in the present embodiment, 90 ° of phase phasic differences.
In infinitely great (the so requirement in theory of quadrature phase shifter output open circuit or its load impedance; Get final product for 10 times greater than its input impedance on the engineering) assumed condition under; The phase shift formula of the RC phase shifter that is made up of an electric capacity and resistance is: the output signal is taken under the situation of electric capacity (promptly export over the ground at an end of electric capacity, realize positive phase shift) and is φ
1=-arctg ω
cC
1R
1(1); It is φ that the output signal is taken under the situation of resistance (promptly export over the ground at an end of resistance, realize negative phase shift)
2=2arctg (1/ ω
cC
2R
2) (2), wherein ω
c=2 π f
c, f
cBe operating frequency.Operation principle according to line transformer shown in Figure 1; The signal of first output terminals A output is taken from first capacitor C 1; Therefore export the phase place of signal and utilize formula (1) to calculate, the signal of second output B output is taken from second resistance R 2, therefore exports the phase place of signal and utilizes formula (2) to calculate.
Concrete value for first capacitor C 1, second capacitor C 2, first resistance R 1 and second resistance R 2 does not limit, as long as the result who calculates according to formula (1) and formula (2) can guarantee that both differences or both sums are 90 °.
For example, the phase place of the signal of first output terminals A output is-45 °, calculates total capacitor value according to formula (1), for example gets first capacitor C 1 and is 10pf, and calculating the first resistance R1 again is 94 Ω.The phase place of the signal of second output B output is+45 °, calculates total capacitor value according to formula (2), for example gets second capacitor C 2 and is 20pf, and calculating the second resistance R2 again is 114 Ω.
The broadband quadrature phase shifter that present embodiment provides calculates according to two phase shift formula (1) and (2), and phase-shift phase is-45 ° to-45 ° of phase shifters (the output signal is taken from electric capacity) on 70MHz, and the last phase-shift phase of 60MHz is-51.6 °, and the last phase-shift phase of 80MHz is-39.8 °; Phase-shift phase is+45 ° to+45 ° of phase shifters (the output signal is taken from resistance) on 70MHz, and the last phase-shift phase of 60MHz is+39.1 °, and the last phase-shift phase of 80MHz is+50.7 °.This shows that the phase difference of the last two paths of signals of 70MHz is 90 °, the last phase difference of 60MHz is 51.6 °+39.1 °=90.7 °, and the last phase difference of 80MHz is 39.8 °+50.7 °=90.5 °.
The calculated data of multi-frequency point is more shown; Phase shift-the frequency characteristic of-45 ° of phase shifters and+45 ° of phase shifters is actually the skew lines parallel to each other substantially that one group of phase-shift phase reduces with increase frequency; The phase-shift phase error is all less than 1 ° on low-limit frequency in the whole frequency range and the highest frequency; Phase displacement error on other Frequency points is littler, and more near centre frequency, the phase-shift phase error is more little.Therefore; Although the phase-shift phase of each frequency component has nothing in common with each other in every road output signal; But quadrature one by one all between all corresponding frequency components in the two-way output signal, and the quadrature precision all can be less than 1 ° is realized the quadrature phase shift with this in 60MHz～80MHz and even wideer frequency range.
The broadband quadrature phase shifter that the embodiment of the invention provides utilizes line transformer composition phase inverter and forms phase shifter by resistance and electric capacity.Because line transformer can the very wide signal of transmission frequency, therefore can realize the quadrature phase shift of broadband signal as phase inverter.This broadband quadrature phase shifter is formed two relative phase shifters by resistance and electric capacity; Because the phase shift and the characteristic between the frequency of two phase shifters are straight lines parallel to each other basically that one group of phase-shift phase reduces with increase frequency, therefore in the frequency range of technical indicator regulation, the respective frequencies phase difference between signals of such two phase shifters output is 90 °; Mutually orthogonal; The orthogonality of this two paths of signals does not receive the influence of frequency, and error is little, satisfies the scope that allows on the engineering.
Referring to Fig. 2, this figure is broadband quadrature phase shifter embodiment two structure charts provided by the invention.
The difference of broadband quadrature phase shifter that present embodiment provides and embodiment one is:
The lower end of the elementary winding of the said first line transformer T1 is connected input signal 101 through the first coupling capacitance C11 with first emitter follower 102 successively.
The upper end of the elementary winding of the said second line transformer T2 is connected said input signal 101 through the second coupling capacitance C22 with said first emitter follower 102 successively.
Need to prove that the effect of first emitter follower 102 is in order to realize the isolation between transformer and the input signal.The effect of the first coupling capacitance C11 and the second coupling capacitance C22 is in order to realize the isolation of direct current.
The common port of said first capacitor C 1 and first resistance R 1 is connected first output terminals A of quadrature phase shifter successively with second emitter follower 103 through the 3rd coupling capacitance C31 of series connection.
The common port of said second capacitor C 2 and second resistance R 2 is connected the second output B of quadrature phase shifter successively with the 3rd emitter-base bandgap grading follower 104 through the 4th coupling capacitance C41 of series connection.
Need to prove that the effect of second emitter follower 103 and the 3rd emitter-base bandgap grading follower 104 is for the load that realizes quadrature phase shifter presents high impedance, to satisfy the condition of phase-shift phase formula.In theory, approach infinity is answered in the load of quadrature phase shifter, but during practical engineering application, as long as greater than 10 times of output impedance.
On the 70MHz centre frequency, the capacitive reactance of-45 ° of phase shifters is 228 Ω, and the impedance of+45 ° of phase shifters is 274 Ω, and the input impedance of emitter follower can be satisfied the engine request of phase shifter load generally about 3k Ω.Emitter follower can adopt the normal transistor of this working frequency range to constitute.
The effect of the 3rd coupling capacitance C31 and the 4th coupling capacitance C41 is in order to realize the isolation of direct current.
Referring to Fig. 3, this figure is broadband quadrature phase shifter embodiment three structure charts provided by the invention.
Present embodiment with the difference of embodiment two is: the upper end of the elementary winding of the said second line transformer T2 in the lower end of the elementary winding of the said first line transformer T1 all is connected input signal 101 through the first coupling capacitance C11 with first emitter follower 102 successively.
Like this, can utilize a coupling capacitance to realize the isolation of direct current.
Referring to Fig. 4, this figure is broadband quadrature phase shifter embodiment four structure charts provided by the invention.
For the appearance value that makes first capacitor C 1 is adjusted accurately easily, can be at the two ends of the first capacitor C 1 parallel connection first tunable capacitor C111; In like manner, for the appearance value that makes second capacitor C 2 is adjusted accurately easily, can be at the two ends of the second capacitor C 2 parallel connection second tunable capacitor C222.
Adjust accurately easily for the resistance that makes first resistance R 1 and second resistance R 2, first resistance R 1 and second resistance R 2 can all adopt adjustable resistance (potentiometer).
During practical application, electric capacity adopts the variable capacitance of a capacitance less than calculated value, the fixed capacity of a low capacity of parallel connection.Resistance adopts the variable resistor of a resistance greater than calculated value.So just can accurately adjust to easily-45 ° or+45 ° quadrature accuracy rating in.
The broadband quadrature phase shifter that the embodiment of the invention provides can be realized the quadrature phase shift of broadband signal through line transformer and resistance and electric capacity.In addition, traditional phase inverter adopts transistor to make, and does not adopt line transformer to make phase inverter.Because line transformer is a kind of passive device, compares with transistor inverter, not only circuit is simple, realizes paraphase easily, and does not require the expenditure of energy.Like this, be more conducive to environmental protection.
The embodiment of the invention also provides a kind of broadband quadrature phase shifter, describes in detail below in conjunction with accompanying drawing.
The broadband quadrature phase shifter that following examples provide is identical with the principle of the broadband quadrature phase shifter that above embodiment provides, and different is only to have adopted a line transformer.
Referring to Fig. 5, this figure is broadband quadrature phase shifter embodiment five structure charts provided by the invention.
The broadband quadrature phase shifter that present embodiment provides comprises: the 3rd line transformer T3, the 3rd capacitor C 3, the 4th capacitor C 4, the 3rd resistance R 3 and the 4th resistance R 4.
The end to end ground connection of two secondary winding of said the 3rd line transformer T3; The lower end ground connection of the elementary winding of said the 3rd line transformer T3.
Because the end to end ground connection of two secondary winding of the 3rd line transformer T3, therefore, the 3rd line transformer T3 constitutes phase inverter, i.e. the top and bottom of secondary winding output signal differs 180 °.
The secondary winding of said the 3rd line transformer T3 connect successively said the 3rd resistance R 3 and said the 3rd capacitor C 3 formation closed-loop paths.
The common port of said the 3rd resistance R 3 and said the 3rd capacitor C 3 is connected first output terminals A of quadrature phase shifter.
The secondary winding of said the 3rd line transformer T3 connect successively said the 4th capacitor C 4 and said the 4th resistance R 4 formation closed-loop paths.
The common port of said the 4th capacitor C 4 and the 4th resistance R 4 is connected the second output B of quadrature phase shifter.
Realize positive phase shift by the 3rd capacitor C 3 and the 3rd resistance R 3, realize negative phase shift by the 4th capacitor C 4 and the 4th resistance R 4.
The broadband quadrature phase shifter that present embodiment provides is similar basically with the principle that embodiment one provides, and repeats no more at this.And, reduced by a line transformer in the present embodiment, can save cost like this.
Referring to Fig. 6, this figure is broadband quadrature phase shifter embodiment six structure charts provided by the invention.
The upper end of the elementary winding of said the 3rd line transformer T3 is connected input signal 101 through the 5th coupling capacitance C55 with the 4th emitter follower 104 successively.
Need to prove that the effect of the 4th emitter follower 104 is in order to realize the isolation between transformer and the input signal 101.The effect of the 5th coupling capacitance C55 is in order to realize the isolation of direct current.
The common port of said the 3rd resistance R 3 and said the 3rd capacitor C 3 is connected first output terminals A of quadrature phase shifter successively with the 5th emitter follower 105 through the 6th coupling capacitance C61 of series connection.
The common port of said the 4th capacitor C 4 and the 4th resistance R 4 is connected the second output B of quadrature phase shifter successively with the 6th emitter follower 106 through the 7th coupling capacitance C71 of series connection.
Need to prove that the effect of the 5th emitter follower 103 and the 6th emitter follower 104 is for the load that realizes quadrature phase shifter presents high impedance, to satisfy the condition of phase-shift phase formula.In theory, approach infinity is answered in the load of quadrature phase shifter, but during practical engineering application, as long as greater than 10 times of output impedance.
The effect of the 6th coupling capacitance C61 and the 7th coupling capacitance C71 is in order to realize the isolation of direct current.
Referring to Fig. 7, this figure is broadband quadrature phase shifter embodiment seven structure charts provided by the invention.
For the appearance value that makes the 3rd capacitor C 3 is adjusted accurately easily, can be at the two ends of the 3rd capacitor C 3 parallel connection the 3rd tunable capacitor C33; In like manner, for the appearance value that makes the 4th capacitor C 4 is adjusted accurately easily, can be at the two ends of the 4th capacitor C 4 parallel connection the 4th tunable capacitor C44.
Adjust accurately easily for the resistance that makes the 3rd resistance R 3 and the 4th resistance R 4, the 3rd resistance R 3 and the 4th resistance R 4 can all adopt adjustable resistance.
During practical application, electric capacity adopts the variable capacitance of a capacitance less than calculated value, the fixed capacity of a low capacity of parallel connection.Resistance adopts the variable resistor of a resistance greater than calculated value.So just can accurately adjust to easily-45 ° or+45 ° quadrature accuracy rating in.
The broadband quadrature phase shifter that the embodiment of the invention provides can be realized the quadrature phase shift of broadband signal through line transformer and resistance and electric capacity.In addition, traditional phase inverter adopts transistor to make, and does not adopt line transformer to make phase inverter.Because line transformer is a kind of passive device, compares with transistor inverter, not only circuit is simple, realizes paraphase easily, and does not require the expenditure of energy.Like this, be more conducive to environmental protection.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art; Do not breaking away under the technical scheme scope situation of the present invention; All the method for above-mentioned announcement capable of using and technology contents are made many possible changes and modification to technical scheme of the present invention, or are revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical scheme of the present invention, all still belongs in the scope of technical scheme protection of the present invention any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (11)
1. a broadband quadrature phase shifter is characterized in that, comprising: first line transformer, second line transformer, first electric capacity, second electric capacity, first resistance and second resistance;
The end to end ground connection of two secondary winding of said first line transformer; The end to end ground connection of two secondary winding of said second line transformer;
The upper end ground connection of the elementary winding of said first line transformer, the lower end connects input signal, the lower end ground connection of the elementary winding of said second line transformer, the upper end connects input signal; The upper end that the pairing end of the same name in the upper end of said first transmission line and the elementary winding of second line transformer is a secondary winding separately;
Connect successively said first electric capacity and said first resistance of the secondary winding of said first line transformer constitutes the closed-loop path, and the common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter;
Connect successively said second electric capacity and said second resistance of the secondary winding of said second line transformer constitutes the closed-loop path, and the common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter.
2. broadband quadrature phase shifter according to claim 1 is characterized in that, the lower end of the elementary winding of said first line transformer is connected input signal through first coupling capacitance with first emitter follower successively;
The upper end of the elementary winding of said second line transformer is connected said input signal through second coupling capacitance with said first emitter follower successively.
3. broadband quadrature phase shifter according to claim 1; It is characterized in that the upper end of the elementary winding of said second line transformer in the lower end of the elementary winding of said first line transformer all is connected input signal through first coupling capacitance with first emitter follower successively.
4. according to claim 2 or 3 described broadband quadrature phase shifters, it is characterized in that the common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter, is specially:
The common port of said first electric capacity and first resistance is connected first output of quadrature phase shifter successively with second emitter follower through the 3rd coupling capacitance of series connection.
5. according to claim 2 or 3 described broadband quadrature phase shifters, it is characterized in that the common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter, is specially:
The common port of said second electric capacity and second resistance is connected second output of quadrature phase shifter successively with the 3rd emitter-base bandgap grading follower through the 4th coupling capacitance of series connection.
6. broadband quadrature phase shifter according to claim 1 is characterized in that, two ends parallel connection first tunable capacitor of said first electric capacity; And/or, two ends parallel connection second tunable capacitor of said second electric capacity.
7. a broadband quadrature phase shifter is characterized in that, comprising: the 3rd line transformer, the 3rd electric capacity, the 4th electric capacity, the 3rd resistance and the 4th resistance;
The end to end ground connection of two secondary winding of said the 3rd line transformer; The lower end ground connection of the elementary winding of said the 3rd line transformer;
Connect successively said the 3rd resistance and said the 3rd electric capacity of the secondary winding of said the 3rd line transformer constitutes the closed-loop path;
The common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter;
Connect successively said the 4th electric capacity and said the 4th resistance of the secondary winding of said the 3rd line transformer constitutes the closed-loop path;
The common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter.
8. broadband quadrature phase shifter according to claim 7 is characterized in that, the upper end of the elementary winding of said the 3rd line transformer is connected input signal through the 5th coupling capacitance with the 4th emitter follower successively.
9. broadband quadrature phase shifter according to claim 8 is characterized in that, the common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter, is specially:
The common port of said the 3rd resistance and said the 3rd electric capacity is connected first output of quadrature phase shifter successively with the 5th emitter follower through the 6th coupling capacitance of series connection.
10. broadband quadrature phase shifter according to claim 9 is characterized in that, the common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter, is specially:
The common port of said the 4th electric capacity and the 4th resistance is connected second output of quadrature phase shifter successively with the 6th emitter follower through the 7th coupling capacitance of series connection.
11., it is characterized in that two ends parallel connection the 3rd tunable capacitor of said the 3rd electric capacity according to each described broadband quadrature phase shifter of claim 7-10; And/or, two ends parallel connection the 4th tunable capacitor of said the 4th electric capacity.
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| JP5828767B2 (en) * | 2012-01-05 | 2015-12-09 | パナソニック株式会社 | Quadrature hybrid coupler, amplifier, wireless communication apparatus, and quadrature hybrid coupler control method |
| CN103414353B (en) * | 2013-08-27 | 2015-11-25 | 中国计量学院 | A kind of phase shift supply unit and phase-moving method |
| 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 |
| CN106848608B (en) * | 2017-01-25 | 2020-03-17 | 东南大学 | Broadband mixed beam forming integrated antenna array |
| CN110474608B (en) * | 2019-09-03 | 2022-10-25 | 中国电子科技集团公司第三十八研究所 | Broadband quadrature phase generation network based on transformer |
| CN110798171B (en) * | 2019-10-15 | 2021-08-24 | 浙江大学 | Hybrid broadband high-precision phase shifter integrated circuit |
-
2009
- 2009-12-01 CN CN2009102387003A patent/CN101741339B/en not_active Expired - Fee Related
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