CN212648451U

CN212648451U - Passive non-dispersive power division phase shifter

Info

Publication number: CN212648451U
Application number: CN202120268596.9U
Authority: CN
Inventors: 林思宏
Original assignee: Chengdu Zhongwei Puye Technology Co ltd
Current assignee: Chengdu Zhongwei Puye Technology Co ltd
Priority date: 2021-02-01
Filing date: 2021-02-01
Publication date: 2021-03-02
Anticipated expiration: 2031-02-01

Abstract

The utility model relates to a passive non-dispersion merit is divided and is moved looks ware relates to electronic communication's technical field, and it includes that passive non-dispersion merit divides and moves looks ware, phase shift microstrip line and bottom dielectric plate including the microstrip merit, and the microstrip merit divides the ware to divide the ware for two merits, and the input that the ware was divided to the microstrip merit is microwave signal input port, an delivery outlet that the ware was divided to the microstrip merit is connected with the one end that moves looks ware, and another delivery outlet that the ware was divided to the microstrip merit is the benchmark delivery outlet, and the one end that the ware was divided to the phase shifter keeping away from the microstrip merit is secondary. The phase difference between the output ports of the power divider can be set to any angle.

Description

Passive non-dispersive power division phase shifter

Technical Field

The application relates to the technical field of electronic communication, in particular to a passive non-dispersive power division phase shifter.

Background

In the phased array antenna, the power divider is an important component of an antenna feed network and has the function of controlling the beam pointing of the antenna.

In a passive feed network of the related art, a sum-difference power divider is a key device and mainly comprises a 3dB coupler and a 90-degree phase shifter, wherein the 90-degree phase shifter is usually a 90-degree Scheffman phase shifter or an open-circuit loading line 90-degree phase shifter.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the sum and difference power divider in the related art can only realize the function of the sum and difference device, namely, the phase difference of two output ports is 0 degree or 180 degrees, the phase difference of any degree cannot be realized, and the sum and difference power divider is difficult to be applied to a specific environment.

SUMMERY OF THE UTILITY MODEL

In order to set the phase difference between the output ports of the power divider to be any angle, the application provides a passive non-dispersive power divider phase shifter.

The passive non-dispersive power division phase shifter provided by the application adopts the following technical scheme:

a passive non-dispersive power division phase shifter comprises a microstrip power divider, a phase shifter, a phase-shifting microstrip line and a bottom-layer dielectric plate, wherein the microstrip power divider is a two-power divider, the input end of the microstrip power divider is a microwave signal input port, one output port of the microstrip power divider is connected with one end of the phase shifter, the other output port of the microstrip power divider is a reference output port, and one end, far away from the microstrip power divider, of the phase shifter is a secondary debugging port.

By adopting the technical scheme, the two output ports of the two power dividers have higher isolation, the power divider and the phase shifter are separately designed and do not interfere with each other, the coupling strength of the coupling line in the phase shifter and the degree of the phase-shifting microstrip line determine the phase difference between the secondary debugging port and the port of the microstrip power divider connected with the phase shifter, the function of setting the phase difference between the reference output port and the secondary debugging port to be any angle can be further realized, the phase can be conveniently debugged after the phase is processed by using the phase-shifting microstrip line as the delay line, and the convenience and the accuracy of phase adjustment are improved.

Optionally, the number of the phase shifters is greater than or equal to two, and two or more phase shifters are arranged in series.

By adopting the technical scheme, the phase shift angle of the phase shifter is generally 90 degrees, two or more sections of 90-degree phase shifters can meet the coupling quantity of various strengths, and the design is flexible.

Optionally, the phase shifter is in the form of a stripline.

By adopting the technical scheme, the impedance of the even mode of the two-section or multi-section phase shifter is too large, the common microstrip coupling line is difficult to realize, the three-layer printed board is adopted to be made into the design of a strip line form, and the lines are connected by the through holes to optimize the line design so as to enhance the coupling degree to realize the problem of too large impedance of the even mode.

Optionally, the port of the strip line of the phase shifter is connected to the port of the phase-shifting microstrip line through a metal connecting line.

By adopting the technical scheme, because the power divider is in a microstrip line form, the phase shifter is in a strip line form, and the whole thicknesses of the power divider and the phase shifter are different, the depths of the cavity structural designs are different, the ports of the metal connecting lines are convenient to stably transition, the output port of the microstrip power divider and the output port of the phase shifter are leveled with the output phase shifting port of the phase shifting microstrip line through the structural design, the metal connecting lines are convenient to weld, and the degree of radio frequency performance reduction caused by jumper wires is greatly reduced.

Optionally, the metal connecting line is of an arc-shaped structure.

By adopting the technical scheme, the microstrip line can be prevented from being pulled and cracked due to expansion with heat and contraction with cold through bending.

Optionally, the metal connection line is a silver-plated copper wire/gold wire.

By adopting the technical scheme, the silver-plated copper wire/gold wire has oxidation erosion resistance and high conductivity, so that radio-frequency signals can pass through almost without loss, can be easily fixed at a specified position by a thermal compression method and an ultrasonic welding technology, and the connection firmness of the strip line port and the phase-shifting microstrip line port is enhanced by a direct welding mode.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 2 is an exploded schematic view of an embodiment of the present application;

FIG. 3 is a circuit schematic of an embodiment of the present application;

FIG. 4 is a waveform diagram of reflection coefficient of simulation results of an embodiment of the present application;

FIG. 5 is a waveform diagram of the isolation of simulation results of an embodiment of the present application;

FIG. 6 is a waveform diagram of insertion loss of simulation results of an embodiment of the present application;

fig. 7 is a waveform diagram of a phase deviation of a simulation result of the embodiment of the present application.

Description of reference numerals: 1. a microstrip power divider; 11. an input port; 12. a second output port; 13. a reference output port; 14. a primary debug port; 15. a secondary debug port; 2. a phase shifter; 21. an upper substrate; 22. a conductive medium; 23. a lower substrate; 24. a connecting shell; 3. a phase-shifting microstrip line; 31. a unit dielectric plate; 4. a bottom dielectric slab; 5. and a metal connecting wire.

Detailed Description

The present application is described in further detail below with reference to figures 1-7.

The embodiment of the application discloses a passive non-dispersive power division phase shifter. Referring to fig. 1 and 2, a passive non-dispersive power division phase shifter includes a microstrip power divider 1, a phase shifter 2, a phase-shifting microstrip line 3, a bottom dielectric plate 4 and a unit dielectric plate 31, where the microstrip power divider 1 is a wilkinson-type one-to-two equal-power divider, the phase shifter 2 is a schiffman phase shifter 2, the microstrip power divider 1 is disposed on the bottom dielectric plate 4, and the phase-shifting microstrip line 3 is disposed on the unit dielectric plate 31; the input end of the microstrip power divider 1 is a microwave signal input port 11, one output end of the microstrip power divider 1 is a first output port, the other output end is a second output port 12, the first output port of the microstrip power divider 1 is a reference output port 13, the second output port 12 of the microstrip power divider 1 is connected with one end of the phase shifter 2, the port of the phase shifter 2 far away from the second output port 12 is a primary debugging port 14, the primary debugging port 14 is connected with one end of the phase-shifting microstrip line 3, and the port of the phase-shifting microstrip line 3 far away from the primary debugging port 14 is a secondary debugging port 15.

Two output ports (even a first output port and a second output port 12) of the Wilkinson type two-power divider have higher isolation, and the microstrip power divider 1 and the phase shifter 2 are separately designed and do not interfere with each other, so that the microstrip power divider 1 is not easily interfered when the phase shifter 2 is adjusted; the phase of the second output port 12, the number of the phase shifters 2 and the degree of the phase-shifting microstrip line 3 determine the output phase of the secondary debugging port 15, the phase-shifting microstrip line 3 as a delay line can achieve the function of setting the phase difference between the primary debugging port 14 and the secondary debugging port 15 to be any angle, and the phase-shifting microstrip line 3 is arranged on the surface of the unit dielectric plate 31, when a worker works the phase-shifting microstrip line 2, the worker can trim the length of the phase-shifting microstrip line 3 through a scalpel or weld an adjusting piece on the phase-shifting microstrip line 3 through an electric iron to debug the phase-shifting microstrip line 3, thereby achieving the function of conveniently adjusting the degree of the phase-shifting microstrip line 3, and improving the convenience and accuracy of adjusting the phase.

Referring to fig. 2 and 3, the number of the phase shifters 2 is greater than or equal to two, two or more phase shifters 2 are arranged in series, the number of the phase shifters 2 adopted in the embodiment of the present application is two, even mode impedance of two phase shifters 2 is too large, and a common microstrip coupling line is difficult to implement, so that the phase shifters 2 are arranged in a strip line form in the present application, that is, the phase shifters 2 adopt three printed boards to make the strip line form, the strip line adopted by the phase shifters 2 includes an upper substrate 21, a conductive medium 22 and a lower substrate 23, the thicknesses of the upper substrate 21 and the lower substrate 23 are both 1.016mm, the thickness of the conductive medium 22 is 0.254mm, the lines are connected by via holes to optimize a line design, and further, the problem of too large even mode impedance is solved by enhancing.

Referring to fig. 2, two end portions of the stripline of the phase shifter 2 are respectively provided with a connecting shell 24, the two connecting shells 24 are symmetrically arranged, the connecting shells 24 are fixedly arranged on the upper substrate 21, the two end portions of the stripline of the phase shifter 2 are respectively connected with a metal connecting wire 5, the end portions of the metal connecting wires 5 extend into the connecting shells 24, the end portion of the second output port 12 of the microstrip power divider 1 extends into one of the connecting shells 24 and then is connected with one of the metal connecting wires 5, and the end portion of the phase-shifting microstrip line 3 close to the primary debugging port 14 extends into the other connecting shell 24 and then is connected with the other metal connecting wire 5.

The microstrip power divider 1 is in a microstrip line form, the phase shifter 2 is in a strip line form, and the thicknesses of the microstrip power divider 1 and the phase shifter 2 can be set to be different, so that the structural design of each cavity of the microstrip power divider needs to be different in depth, the metal connecting line 5 is adopted to facilitate the connection between the phase shifter 2 and the microstrip power divider 1 or the connection between the phase shifter 2 and the phase-shifting microstrip line 3 to be stable and excessive, the output port of the microstrip power divider 1 is flush with the port of the phase shifter 2 and the port of the phase shifter 2 is flush with the port of the phase-shifting microstrip line 3 through the structural design, the metal connecting line 5 is convenient to weld, and the.

Referring to fig. 2, the metal connection line 5 is a silver-plated copper wire/gold wire and the metal connection line 5 has an arc structure. The silver-plated copper wire/gold wire has oxidation erosion resistance and high conductivity, so that radio-frequency signals can pass through the silver-plated copper wire/gold wire almost without loss, meanwhile, the silver-plated copper wire/gold wire can be easily fixed at a specified position through a heat compression method and an ultrasonic welding technology, and the connection firmness of the strip line port of the phase shifter 2 and the port of the phase-shifting microstrip line 3 and the strip line port of the phase shifter 2 and the microstrip power divider 1 is enhanced through a direct welding mode.

The principle of adjusting the phase through the phase shifter 2 and the phase-shifting microstrip line 3 is as follows: the phase (Z1) = the number of degrees (Y) -n × 2 × W ° (n is the number of phase shifters 2) of the reference output port 13, and W is 90, the two-degree phase shifter 2 adopted in the embodiment of the present application can satisfy the coupling amount of various strengths, the design is flexible, the phase (Z2) = the phase (Z1) of the primary debug port 14) -the number of degrees of the phase-shifted microstrip line 3 of the secondary debug port 15 adjusts the coupling strength of the coupling line in the phase shifter 2 by adjusting the even mode impedance Zoe and the odd mode impedance Zoo of the phase shifter 2, so that the coupling strength can be adapted to the number of the required phase shifters 2.

The phase-shifting microstrip line 3 is used as a delay line, wherein the delay line is an element or a device for delaying an electric signal for a period of time, the delay line has a flat amplitude-frequency characteristic and a certain phase-shifting characteristic (or delay frequency characteristic) in a passband, the delay line comprises an acoustic wave delay line, an optical fiber, an optical waveguide delay line and a superconducting microwave delay line, wherein the delay time of the acoustic wave delay line depends on the length of a sound transmission medium, the superconducting delay line can be divided into two types, one type is that a section of uniform transmission line is used for realizing the time delay of a signal through a zigzag (snake) line structure or a double helix structure, the other type is a tapped delay line, namely a linear frequency modulation filter, the former type can realize the time delay effect through a microstrip line, a coplanar waveguide or a strip line structure, and the phase difference formed after the signal is delayed by the delay time of the phase-shifting microstrip line 3 is, the degree of the phase-shifting microstrip line 3 can be adjusted by a manufacturer according to the requirement.

Referring to fig. 4-7, by using ADS software to set up an optimized circuit design, the number of phase shifters 2 required is determined according to the phase difference between the output ports of the power divider required by adjusting the coupling strength of the coupling lines in the phase shifters 2 (i.e., adjusting the even mode impedance Zoe and the odd mode impedance Zoo) to realize the initial coarse adjustment of the phase difference, and then the degree of the phase-shifting microstrip line 3 is determined according to the phase difference between the output ports of the power divider required by the phase difference to realize the secondary fine adjustment of the phase difference, so that the phase of the output signal of the secondary debugging port 15 is delayed or advanced by the degree required by the phase of the output signal of the reference output port 13, thereby achieving the purpose of power division phase shifting.

The implementation principle of the passive non-dispersive power division phase shifter in the embodiment of the application is as follows: the second output port 12 of the microstrip power divider 1 is connected with the phase shifter 2 in the form of a strip line, the other end of the phase shifter 2 is connected with the phase-shifting microstrip line 3, and the number of the phase shifters 2 and the degree of the phase-shifting microstrip line 3 are determined according to the phase difference between the output ports of the power divider, so that the phase difference between the output ports of the power divider meets the required degree.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a passive non-dispersion merit divides and moves looks ware, its characterized in that, includes that the microstrip merit divides ware (1), moves looks ware (2), moves looks microstrip line (3) and bottom dielectric plate (4), and the microstrip merit divides ware (1) to divide the ware for two merits, and the input that the ware (1) was divided to the microstrip merit is microwave signal input port (11), an delivery outlet and the one end that moves looks ware (2) of moving phase of microstrip merit (1) are connected, and another delivery outlet that the ware (1) was divided to the microstrip merit is benchmark delivery outlet (13), and the one end that moves ware (1) is divided to the microstrip merit that looks ware (2) keep away from is secondary debugging mouth (15).

2. A passive non-dispersive power splitting phase shifter according to claim 1, wherein the number of the phase shifters (2) is two or more, and two or more phase shifters (2) are arranged in series.

3. A passive non-dispersive power splitting phase shifter according to claim 2, wherein the phase shifter (2) is in the form of a stripline.

4. A passive non-dispersive power-dividing phase shifter according to claim 3, characterised in that the strip line port of the phase shifter (2) is connected to the port of the phase shifting microstrip line (3) by a metal connecting line (5).

5. A passive non-dispersive power-dividing phase shifter according to claim 4, wherein the metal connection lines (5) are of an arc-shaped configuration.

6. A passive non-dispersive power-dividing phase shifter according to claim 4, characterised in that the metal connection lines (5) are silver plated copper/gold wires.