CN110034749B - Large-frequency-ratio double-frequency phase shifter with respectively controllable phase shift amount - Google Patents
Large-frequency-ratio double-frequency phase shifter with respectively controllable phase shift amount Download PDFInfo
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- CN110034749B CN110034749B CN201910212741.9A CN201910212741A CN110034749B CN 110034749 B CN110034749 B CN 110034749B CN 201910212741 A CN201910212741 A CN 201910212741A CN 110034749 B CN110034749 B CN 110034749B
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- 230000010363 phase shift Effects 0.000 title claims abstract description 40
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K5/00—Manipulating of pulses not covered by one of the other main groups of this subclass
- H03K2005/00286—Phase shifter, i.e. the delay between the output and input pulse is dependent on the frequency, and such that a phase difference is obtained independent of the frequency
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Abstract
The invention discloses a large-frequency-ratio double-frequency phase shifter with respectively controllable phase shift amounts, relates to a double-frequency phase shifter, and belongs to the technical field of basic electrical elements. The double-frequency phase shifter is composed of a square symmetrical stepped impedance transmission line segment combination, two identical double-frequency susceptance units for phase shift amount control and two switches for phase switching. The dual-frequency susceptance unit is implemented by a short-ended or open-ended stub, and the stub may be a stepped impedance stub in which two or more sections of transmission lines are cascaded. The phase shifter is realized by using microstrip lines, can realize that phase shifting quantities are respectively arranged on two frequency points, and has the advantages of low loss, low processing cost, easy integration and the like.
Description
Technical Field
The invention discloses a large-frequency-ratio double-frequency phase shifter with respectively controllable phase shift amounts, relates to a double-frequency phase shifter, and belongs to the technical field of basic electrical elements.
Background
The phase shifter is a device capable of adjusting the phase of electromagnetic waves, and plays an important role in the regulation and control of the phase of the phased array radar antenna, the modulation of the phase of a radio frequency communication signal and the control of the phase of a measuring system. In the last 60 th century, with the high-speed development of phased array radars, the importance of a key component, namely a phase shifter, is increasingly highlighted, and then, as the phase shifter is also applied to the fields of communication networks, missile attitude control, instrument design and the like, the research on the phase shifter is long-lasting.
Today, the miniaturization trend of communication equipment requires that the communication equipment simultaneously work on two frequency points or even a plurality of frequency points to reduce the space cost, and the antenna technology is developed to the present, the double-frequency antenna such as a double-frequency array antenna and a double-frequency reconfigurable antenna also provides exact requirements for the double-frequency performance of the phase shifter. At present, a dual-frequency phase shifter capable of respectively controlling phase shift quantities does not exist, and the invention aims to provide a method for controlling the phase shift quantities at two frequency points through one voltage.
Disclosure of Invention
The invention aims to provide the large-frequency-ratio dual-frequency phase shifter with the phase shift amount controllable respectively, so that the phase shift amount of the dual-frequency phase shifter on two frequency points can be controlled, and the technical problem of how to control the phase shift amount of the dual-frequency phase shifter on the two frequency points respectively is solved.
The invention adopts the following technical scheme for realizing the aim of the invention:
a large frequency ratio dual-frequency phase shifter with separately controllable phase shift amounts includes:
the transmission line segment combination is formed by four symmetrical stepped impedance transmission lines which are connected end to end, the two opposite sections of symmetrical stepped impedance transmission lines have the same electrical length and characteristic impedance, two ends of one section of symmetrical stepped impedance transmission line in the transmission line combination are used as an input end and an output end,
two double-frequency susceptance units for controlling the amount of phase shift, which are respectively connected to both ends of a symmetrical stepped impedance transmission line having the same electrical length and the same characteristic impedance as the symmetrical stepped impedance transmission line between the input end and the output end, susceptance values of the double-frequency susceptance units at two frequency points are determined according to the characteristic impedance of the port and the amount of phase shift at the two frequency points, and,
two switches for phase switching are respectively connected with two ends of a symmetrical step impedance transmission line which has the same electrical length and the same characteristic impedance with the symmetrical step impedance transmission line between the input end and the output end.
As a further optimization scheme of the large-frequency-ratio double-frequency phase shifter with the separately controllable phase shift quantity, the symmetrical step impedance transmission line is formed by cascading three sections of uniform transmission lines, and the two sections of transmission lines at the end part have the same electrical length and characteristic impedance.
As a further optimization scheme of the large-frequency-ratio dual-frequency phase shifter with the separately controllable phase shift quantity, the dual-frequency susceptance unit is a stub with an open-circuit terminal or a short-circuit terminal, and the stub is a stepped impedance stub formed by cascading two or more transmission lines.
As a further optimization scheme of the large-frequency-ratio dual-frequency phase shifter with respectively controllable phase shift quantity, each section of symmetrical stepped impedance transmission line in the square transmission line combination is a bent or folded transmission line.
As a further optimization scheme of the large-frequency-ratio dual-frequency phase shifter with separately controllable phase shift quantities, susceptance values of the dual-frequency susceptance units at two frequency points are as follows:
Bm(f1)、Bm(f2) Each of the two susceptance units being a dual-frequency susceptance unit at f1、f2Susceptance value of f1、f2For double frequency shiftTwo working frequency points, Z, of the phase device0For the purpose of the characteristic impedance of the port,
for dual-frequency phase shifters at f1、f2The amount of phase shift.
As a further optimization scheme of the large-frequency-ratio dual-frequency phase shifter with separately controllable phase shift amount, the stub is a bent or folded transmission line.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the impedance parameter of the square transmission line segment combination in the double-frequency phase shifter disclosed by the application does not change along with the switching of the frequency points of the phase shifter, the arbitrary phase shift quantity on different frequency points can be realized only by adjusting the impedance parameter of the double-frequency susceptance unit according to the phase shift quantity on the frequency points and the characteristic impedance of the port, the arbitrary phase shift at two frequency points is realized through one voltage, and the double-frequency phase shifter is particularly suitable for the phase shift quantity control of the double-frequency phase shifter with a large frequency ratio.
(2) The microstrip line is adopted to realize the phase shifter circuit, the PIN tube is adopted to realize the switch for switching the phase, the loss and the processing cost are reduced, and the integration is easy.
Drawings
Fig. 1 is a structural diagram of a large frequency ratio dual-frequency phase shifter in which phase shift amounts are respectively controllable.
FIG. 2 is a simulated comparison of phase shift curves for dual-frequency phase shifters shifted 90 at 0.9 GHz.
Fig. 3 is a structural diagram of the short-circuited second-order stepped impedance stub.
FIG. 4 is a simulated comparison of phase shift curves for dual-frequency phase shifters shifted 90 at 4.68 GHz.
Detailed Description
The technical scheme of the invention is explained in detail in the following with reference to the attached drawings.
The double-frequency phase shifter disclosed by the invention is composed of a square symmetrical stepped impedance transmission line segment combination, two identical double-frequency susceptance units for phase shift amount control and two switches for phase switching, as shown in figure 1. The square symmetrical stepped impedance transmission line segment combination comprises four sections of symmetrical stepped impedance transmission lines which are connected end to end, and two opposite but non-adjacent symmetrical stepped impedance transmission lines have the same electrical length and characteristic impedance. Each symmetrical step impedance transmission line is formed by cascading three sections of uniform transmission lines, and the electrical length of the two sections of transmission lines at the left end and the right end is completely the same as the characteristic impedance. The dual-frequency susceptance unit may be implemented by a stub having an open or short-circuited terminal, and the stub may be a stepped impedance stub in which two or more sections of transmission lines are cascaded. Each section of symmetrical stepped impedance transmission line or stub may be a straight transmission line or a transmission line that is bent or folded to some extent.
Taking the characteristic impedance Z of a port0Is a classical value of 50 omega. Setting its working frequency points as f1、f2Frequency ratio m ═ f2/f1The amount of phase shift is respectively
Impedance ratio r1＝Z1/Z2，r2＝Z3/Z4Electrical length ratio k1＝θ2/θ1，k2＝θ4/θ3Wherein k is1、k2The value can be freely taken. According to the working frequency point f1、f2The phases of the switch when closed and when open are designed.
The specific parameters in fig. 1 can be solved by the following equations:
wherein Z is1、θ1The impedance mode value and the impedance phase angle Z of two sections of transmission lines at the end part of a group of three-section cascade type symmetrical stepped impedance transmission line2、θ2A group of three-section cascade symmetrical stepped impedance transmission line middle positionsImpedance modulus and impedance phase angle, Z, of transmission line3、θ3The impedance mode value and the impedance phase angle Z of two sections of transmission lines at the end part of the other group of three-section cascade type symmetrical stepped impedance transmission line4、θ4The impedance modulus and the impedance phase angle theta of the transmission line at the middle position of the other group of three-section cascade type symmetrical stepped impedance transmission line1、θ3The transcendental equation is satisfied:
the equation needs to be solved by numerical methods or optimization methods.
In addition, r1、r2Can be solved by the following formula:
the susceptance values of the dual-frequency susceptance unit are respectively at two frequency points:
can be realized by using an open-circuited or short-circuited uniform stub or an open-circuited or short-circuited stepped impedance stub, the parameter Z of which ism、θmThe solution can be solved by numerical methods or optimization methods.
Design example 1:
f1＝0.9GHz，f24.68GHz, frequency ratio m 5.2, at f1In the above-mentioned manner,
at f2On the upper part
Respectively 0 °, 30 °, 60 °, 90 °, 150 °, 180 °, k1＝k2＝1。
Some circuit parameter values of the dual-frequency phase shifter are constant for different phase-shifting quantities, as shown in table 1.
TABLE 1 common parameter values for dual-frequency phase shifters
| Z1 | θ1 | Z2 | θ2 | Z3 | θ3 | Z4 | θ4 |
| 45.2Ω | 29° | 27.2Ω | 29° | 63.9Ω | 29° | 39.1Ω | 29° |
The circuit parameter values of the dual-frequency susceptance unit of the dual-frequency phase shifter at different phase-shifting quantities are shown in table 2.
TABLE 2 Circuit parameter values for Dual-frequency susceptance cells
The simulation comparison graph of the phase shift curves of the dual-frequency phase shifters is shown in fig. 2.
Design example 2:
f1＝0.9GHz，f24.68GHz, frequency ratio m 5.2, at f1In the above-mentioned manner,
respectively 0 °, 30 °, 60 °, 90 °, 150 °, 180 ° at f2On the upper part
Get k1＝k2＝1。
The common circuit parameters of the dual-frequency phase shifters with different phase shift quantities are also shown in table 1, and the values of the circuit parameters of the dual-frequency susceptance units of the dual-frequency phase shifters with different phase shift quantities are shown in table 3.
TABLE 3 Circuit parameter values for Dual-frequency susceptance cells
Wherein when
Meanwhile, the dual-frequency susceptance needs to be realized by a short-circuited second-order stepped impedance stub, and the structure of the dual-frequency susceptance is shown in fig. 3. Wherein Z1＝55.17Ω，Z2＝27.59Ω，θ＝54.74°。
The simulation comparison graph of the phase shift curves of the dual-frequency phase shifters in design example 2 is shown in fig. 4.
As can be seen from embodiments 1 and 2, the impedance parameter of the "square" transmission line segment combination in the dual-frequency phase shifter disclosed in the present application does not change with the switching of the frequency points of the phase shifter, and any phase shift amount at different frequency points can be realized only by adjusting the impedance parameter of the dual-frequency susceptance unit according to the phase shift amount at the frequency points and the port characteristic impedance, and any phase shift at two frequency points is realized by one voltage, which is particularly suitable for the phase shift amount control of the dual-frequency phase shifter with a large frequency ratio.
Claims (6)
1. A large frequency ratio dual-frequency phase shifter with respectively controllable phase shift amount is characterized by comprising:
the transmission line segment combination is formed by four symmetrical stepped impedance transmission lines which are connected end to end, the two opposite sections of symmetrical stepped impedance transmission lines have the same electrical length and characteristic impedance, two ends of one section of symmetrical stepped impedance transmission line in the transmission line combination are used as an input end and an output end,
two double-frequency susceptance units for controlling the amount of phase shift, which are respectively connected to both ends of a symmetrical stepped impedance transmission line having the same electrical length and the same characteristic impedance as the symmetrical stepped impedance transmission line between the input end and the output end, susceptance values of the double-frequency susceptance units at two frequency points are determined according to the characteristic impedance of the port and the amount of phase shift at the two frequency points, and,
two switches for phase switching are respectively connected with two ends of a symmetrical step impedance transmission line which has the same electrical length and the same characteristic impedance with the symmetrical step impedance transmission line between the input end and the output end.
2. The phase shifter of claim 1, wherein the symmetrical ladder impedance transmission line is formed by cascading three sections of uniform transmission lines, and the two sections of transmission lines at the ends have the same electrical length and characteristic impedance.
3. The phase shifter according to claim 1, wherein the dual susceptance unit is a stub with an open or short-circuited end, and the stub is a stepped impedance stub formed by cascading two or more transmission lines.
4. The phase shifter of claim 1, wherein each of the symmetrical ladder impedance transmission lines in the square transmission line combination is a bent or folded transmission line.
5. The phase shifter according to claim 1, wherein the susceptance values of the dual-frequency susceptance unit at two frequency points are:
Bm(f1)、Bm(f2) Each of the two susceptance units being a dual-frequency susceptance unit at f1、f2Susceptance value of f1、f2For two working frequency points, Z, of a dual-frequency phase shifter0For the purpose of the characteristic impedance of the port,
for dual-frequency phase shifters at f1、f2The amount of phase shift.
6. The phase shifter of claim 3, wherein the stub is a bent or folded transmission line.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101194420A (en) * | 2005-06-10 | 2008-06-04 | 艾利森电话股份有限公司 | Phase shifter |
| CN107615678A (en) * | 2015-05-12 | 2018-01-19 | 华为技术有限公司 | A kind of double frequency phased array |
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| JP2888281B2 (en) * | 1996-02-21 | 1999-05-10 | 日本電気株式会社 | Hybrid reflective phase shifter |
| CN101110489A (en) * | 2007-08-14 | 2008-01-23 | 锐迪科无线通信技术（上海）有限公司 | Variable radio frequency signal phase-shifting circuit and its phase-shifting method |
| CN103474724B (en) * | 2013-09-24 | 2016-06-15 | 上海无线电设备研究所 | High-performance Tunable dual band phase shifter and double frequency passband method of adjustment thereof |
| CN203721852U (en) * | 2013-09-24 | 2014-07-16 | 上海无线电设备研究所 | High performance adjustable double-frequency phase shifter |
| CN105337012B (en) * | 2015-09-30 | 2018-06-29 | 南京航空航天大学 | A kind of double frequency coupler based on stepped impedance transformer |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101194420A (en) * | 2005-06-10 | 2008-06-04 | 艾利森电话股份有限公司 | Phase shifter |
| CN107615678A (en) * | 2015-05-12 | 2018-01-19 | 华为技术有限公司 | A kind of double frequency phased array |
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