Microstrip phase shifter and electronic equipment

Abstract

The invention relates to a micro-strip phase shifter and electronic equipment, the micro-strip phase shifter comprises a dielectric substrate, a micro-strip line and a control circuit, the micro-strip line is arranged on the surface of the dielectric substrate and comprises a main micro-strip line, a signal switch assembly and a phase-shifting branch knot connected to the main micro-strip line in parallel, and the phase-shifting branch knot comprises a first branch knot and a second branch knot; the signal switch assembly comprises a first switch and a second switch which are arranged at the joints of the first branch knot and the main microstrip line and the second branch knot and the main microstrip line respectively, the control circuit controls the first switch and the second switch to be switched on and switched off, and when first target phase shift is achieved, the control circuit controls the second switch to be switched on and the first switch to be switched off, so that the first branch knot is connected into the line and the second branch knot is short-circuited. And when the second target phase shift is realized, the control circuit controls the first switch to be switched on and the second switch to be switched off, so that the second branch is connected to the line, the first branch is short-circuited, the target phase shift can be realized only by connecting the first branch or the second branch, and the circuit area is reduced.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of communication technology, and in particular to a microstrip phase shifter and electronic device. Background Technology

[0002] Currently, modern mobile communication technology has increasingly stringent requirements for the coverage and optimization of wireless networks, leading to the widespread application of electrically tunable antennas. Phase shifters are a key component of electrically tunable antennas.

[0003] In the process of realizing this invention, the inventors discovered that current microstrip phase shifters include a dielectric substrate and a microstrip line. The microstrip line includes a main microstrip line, a control circuit, and multiple phase shift stubs. The multiple phase shift stubs are fixedly connected in parallel to the main microstrip line. The control circuit is connected to the microstrip phase shifter to conduct electricity so that the multiple phase shift stubs can complete the target phase shift. However, the parallel connection of multiple phase shift stubs results in a large circuit area and high insertion loss. Summary of the Invention

[0004] In view of the above problems, this invention provides a microstrip phase shifter and electronic device that overcomes the above problems.

[0005] According to one aspect of the present invention, a microstrip phase shifter is provided, comprising a dielectric substrate, a microstrip line, and a control circuit. The microstrip line is disposed on the surface of the dielectric substrate and includes a main microstrip line, a signal switching assembly, and a phase-shifting stub. The phase-shifting stub is connected in parallel with the main microstrip line. The signal switching assembly includes a first switch and a second switch, both of which are connected to the main microstrip line. The phase-shifting stub includes a first stub and a second stub. The first switch is disposed at the connection between the first stub and the main microstrip line, and the second switch is disposed at the connection between the second stub and the main microstrip line. The signal switching assembly is connected to the control circuit, which controls the first switch and the second switch to be turned on or off. When the first stub is used to achieve a first target phase shift, the control circuit controls the second switch to be turned on and the first switch to be turned off, the first stub is connected to the main microstrip line, and the second stub is short-circuited. When the second stub is used to achieve a second target phase shift, the control circuit controls the first switch to be turned on and the second switch to be turned off, the second stub is connected to the main microstrip line, and the first stub is short-circuited.

[0006] In one optional embodiment, the microstrip phase shifter further includes a first stub switch assembly, which includes a third switch, a fourth switch, and a fifth switch. The first stub switch assembly is connected to the control circuit. The first stub is U-shaped. The third, fourth, and fifth switches are all connected across the first stub along the length of the U-shaped first stub. The third switch is adjacent to the fourth switch, and the fifth switch is located at the end of the first stub closest to the first switch. The three switches, the fourth switch, and the fifth switch are spaced apart by a preset distance. The control circuit controls the first stub switch assembly to be turned on or off. The first stub switch assembly is used to change the length of the first stub connected to the main microstrip line.

[0007] In one alternative embodiment, when the first stub is used to achieve a first target phase shift at a first frequency point, the control circuit controls the second, third, and fifth switches to be turned on and the first and fourth switches to be turned off; or, when the first stub is used to achieve a first target phase shift at a second frequency point, the control circuit controls the second, fourth, and fifth switches to be turned on and the first and third switches to be turned off. The length of the first stub connected to the main microstrip line at the first frequency point is longer than the length of the first stub connected to the main microstrip line at the second frequency point.

[0008] In one optional embodiment, the microstrip phase shifter further includes a second stub switch assembly, which includes a sixth switch, a seventh switch, and an eighth switch. The second stub switch assembly is connected to the control circuit. The second stub is U-shaped. The sixth, seventh, and eighth switches are all connected across the second stub along the length of the U-shaped second stub. The sixth switch is adjacent to the seventh switch, and the eighth switch is located at the end of the second stub closest to the second switch. The sixth, seventh, and eighth switches are spaced apart by a preset distance. The control circuit controls the second stub switch assembly to be turned on or off. The second stub switch assembly is used to change the length of the second stub connected to the main microstrip line.

[0009] In one alternative embodiment, when the second stub is used to achieve a second target phase shift at the first frequency point, the control circuit controls the first switch, the sixth switch, and the eighth switch to be turned on, and the second switch and the seventh switch to be turned off; or, when the second stub is used to achieve a second target phase shift at the second frequency point, the first switch, the seventh switch, and the eighth switch are turned on, and the second switch and the sixth switch are turned off. The length of the second stub connected to the main microstrip line at the first frequency point is longer than the length of the second stub connected to the main microstrip line at the second frequency point.

[0010] In one alternative embodiment, the microstrip line further includes two signal lines, and the microstrip phase shifter further includes a power divider. One end of the power divider is connected to the main microstrip line, and the other end of the power divider includes two output ports. One of the output ports is connected to one of the signal lines. The power divider is used to distribute the input signal of the main microstrip line to the two signal lines.

[0011] In one alternative embodiment, the phase shifter further includes an isolation resistor, one end of which is connected to one of the output ports and the other end of which is connected to another of the output ports, the isolation resistor being used to isolate signals.

[0012] In one optional embodiment, the main microstrip line includes a first microstrip line, a second microstrip line, and a third microstrip line. One end of the first microstrip line is a signal input terminal. The other end of the first microstrip line is connected to one end of the second microstrip line. The other end of the second microstrip line is connected to one end of the third microstrip line. The other end of the third microstrip line is connected to one end of the power divider. The end of the first microstrip line near the second microstrip line, both ends of the second microstrip line, and the end of the third microstrip line near the second microstrip line are all chamfered. The first switch is located at the connection between the first microstrip line and the second microstrip line, and the second switch is located at the connection between the second microstrip line and the third microstrip line.

[0013] In one alternative embodiment, the corners of the signal line are chamfered to improve the impedance continuity of the microstrip line.

[0014] According to one aspect of the present invention, an electronic device embodiment is provided, comprising the microstrip phase shifter described above.

[0015] Unlike existing technologies, this invention provides a microstrip phase shifter, including a dielectric substrate, microstrip lines, and a control circuit. The microstrip lines are disposed on the surface of the dielectric substrate. The microstrip lines include a main microstrip line, a signal switching assembly, and a phase-shifting stub. The phase-shifting stub is connected in parallel with the main microstrip line. The signal switching assembly includes a first switch and a second switch, both connected to the main microstrip line. The phase-shifting stub includes a first stub and a second stub. The first switch is located at the connection point between the first stub and the main microstrip line. The second switch is located at the connection between the second stub and the main microstrip line. The signal switch assembly is connected to the control circuit, which controls the first and second switches to be on or off. When the first stub is used to achieve the first target phase shift, the control circuit controls the second switch to be on and the first switch to be off, the first stub is connected to the main microstrip line, and the second stub is short-circuited. When the second stub is used to achieve the second target phase shift, the control circuit controls the first switch to be on and the second switch to be off, the second stub is connected to the main microstrip line, and the first stub is short-circuited. By connecting either the first or second stub to the main microstrip line, the target phase shift can be achieved, reducing the circuit area. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the drawings without creative effort.

[0017] Figure 1 This is a perspective view of a microstrip phase shifter according to an embodiment of the present invention; Figure 2 This is a perspective view of the microstrip circuitry of the microstrip phase shifter according to an embodiment of the present invention; Figure 3 yes Figure 2 Enlarged view of part D in section A; Figure 4 This is a state table of all phase-shiftable states of the microstrip phase shifter in this embodiment of the invention; Figure 5 This is a schematic diagram showing the result of a 45° phase shift in the microstrip phase shifter according to an embodiment of the present invention; Figure 6 This is a schematic diagram showing the result of a 90° phase shift in the microstrip phase shifter according to an embodiment of the present invention; Figure 7 This is a schematic diagram showing the result of a 135° phase shift in the microstrip phase shifter according to an embodiment of the present invention; Figure 8 This is a schematic table of reference phases for the microstrip phase shifter according to an embodiment of the present invention; Reference numerals: 1-Dielectric substrate, 2-Microstrip line, 21-Main microstrip line, 211-First microstrip line, 212-Second microstrip line, 213-Third microstrip line, 22-Signal switch assembly, 221-First switch, 222-Second switch, 23-Phase shift stub, 231-First stub, 2311-First parallel arm, 2312-Second parallel arm, 2313-First connection, 232-Second stub, 2321-Third parallel arm, 2322-Fourth parallel arm, 2323-Second connection, 3-First stub switch assembly, 31-Third switch, 32-Fourth switch, 33-Fifth switch, 4-Second stub switch assembly, 41-Sixth switch, 42-Seventh switch, 43-Eighth switch, 5-Signal line, 6-Power divider, 61-Output port, 7-Isolation resistor. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more detailed description is provided below with reference to the accompanying drawings and specific embodiments. It should be noted that when an element is described as being "fixed to" another element, it can be directly on the other element, or one or more intermediate elements may exist between them. When an element is described as being "connected to" another element, it can be directly connected to the other element, or one or more intermediate elements may exist between them. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this specification are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used in this specification includes any and all combinations of one or more of the associated listed items.

[0020] Please see Figure 1The microstrip phase shifter includes a dielectric substrate, a microstrip line, a control circuit (not shown), a first stub switch assembly 3, and a second stub switch assembly 4. The microstrip line 2 is disposed on the surface of the dielectric substrate 1. The microstrip line 2 includes a main microstrip line 21, a signal switch assembly 22, and a phase-shifting stub 23. The phase-shifting stub 23 is connected in parallel with the main microstrip line 21. The signal switch assembly 22 includes a first switch 221 and a second switch 222, both of which are connected to the main microstrip line 21. The phase-shifting stub 23 includes a first stub 231 and a second stub 232. The first switch 221 is disposed at the connection between the first stub 231 and the main microstrip line 21, and the second switch 222 is disposed at the connection between the second stub 232 and the main microstrip line 21. At the connection point, the signal switch assembly 22 is connected to the control circuit. The control circuit is used to control the first switch 221 and the second switch 222 to be turned on or off. The first switch assembly 3 is disposed on the first branch 231, and the second switch assembly 4 is disposed on the second branch 232. When the first branch 231 is used to achieve the first target phase shift, the control circuit controls the second switch 222 to be turned on and the first switch 221 to be turned off. The first branch 231 is connected to the main microstrip line 21, and the second branch 232 is short-circuited. When the second branch 232 is used to achieve the second target phase shift, the control circuit controls the first switch 221 to be turned on and the second switch 222 to be turned off. The second branch 232 is connected to the main microstrip line 21, and the first branch 231 is short-circuited.

[0021] For the aforementioned main microstrip circuit, please refer to Figure 2 and Figure 3 The main microstrip line 21 includes a first microstrip line 211, a second microstrip line 212, and a third microstrip line 213. One end of the first microstrip line 211 is a signal input terminal. The other end of the first microstrip line 211 is connected to one end of the second microstrip line 212. The other end of the second microstrip line 212 is connected to one end of the third microstrip line 213. The other end of the third microstrip line 213 is connected to one end of the power divider 6. The end of the first microstrip line 211 near the second microstrip line 212, both ends of the second microstrip line 212, and the... The third microstrip line 213 has a chamfered end near the second microstrip line 212. The first switch 221 is located at the connection between the first microstrip line 211 and the second microstrip line 212, and the second switch 222 is located at the connection between the second microstrip line 212 and the third microstrip line 213. At this time, the parasitic inductance of the microstrip line 2 is minimized, and the connection between the first microstrip line 211 and the second microstrip line 212, and the connection between the second microstrip line 212 and the third microstrip line 213 are all chamfered. The chamfer helps to improve impedance continuity.

[0022] For the aforementioned phase-shifting branch 23, please refer to Figure 2 and Figure 3 The phase-shifting stub 23 includes a first stub 231 and a second stub 232, both of which are U-shaped. The first stub 231 includes a first parallel arm 2311, a second parallel arm 2312, and a first connecting portion 2313. One end of the first parallel arm 2311 is connected to one end of the first connecting portion 2313, and the other end of the first connecting portion 2313 is connected to one end of the second parallel arm 2312. The first parallel arm 2311 is parallel to the second parallel arm 2312, and the first parallel arm 2311 is parallel to the second parallel arm 2312. The parallel arms 2312 are of equal length; the second branch 232 includes a third parallel arm 2321, a fourth parallel arm 2322, and a second connecting portion 2323. One end of the third parallel arm 2321 is connected to one end of the second connecting portion 2323, and the other end of the second connecting portion 2323 is connected to one end of the fourth parallel arm 2322. The third parallel arm 2321 is parallel to the fourth parallel arm 2322 and the lengths of the third parallel arm 2321 and the fourth parallel arm 2322 are equal. The first connecting portion 2313 and the second connecting portion 2323 are both U-shaped.

[0023] For the first branch switch assembly 3 mentioned above, please refer to Figure 1 and Figure 2The first branch switch assembly 3 includes a third switch 31, a fourth switch 32, and a fifth switch 33. The first branch switch assembly 3 is connected to the control circuit. The third switch 31, fourth switch 32, and fifth switch 33 all span the first branch 231 along its length. The third switch 31 is adjacent to the fourth switch 32, and the fifth switch 33 is located at the end of the first branch 231 near the first switch 221. The three switches 31, fourth switch 32, and fifth switch 33 are spaced apart by a predetermined distance. One end of the third switch 31 is connected to one end of the first connecting part 2313, and the other end of the third switch 31 is connected to the first connecting part 2313. At the other end of a connecting part 2313, one end of the fourth switch 32 is connected to the end of the first parallel arm 2311 near the first connecting part 2313, and the other end of the fourth switch 32 is connected to the end of the second parallel arm 2312 near the first connecting part 2313. One end of the fifth switch 33 is connected to the end of the first parallel arm 2311 away from the first connecting part 2313, and the other end of the fifth switch 33 is connected to the end of the second parallel arm 2312 away from the first connecting part 2313. The control circuit controls the first stub switch assembly 3 to be turned on or off. The first stub switch assembly 3 is used to change the length of the first stub 231 connected to the main microstrip line 21.

[0024] For the second branch switch assembly 4 mentioned above, please refer to Figure 2 and Figure 3The second branch switch assembly 4 includes a sixth switch 41, a seventh switch 42, and an eighth switch 43. The second branch switch assembly 4 is connected to the control circuit. The sixth switch 41, the seventh switch 42, and the eighth switch 43 all span the second branch 232 along its length. The sixth switch 41 is adjacent to the seventh switch 42, and the eighth switch 43 is located at one end of the second branch 232 near the second switch 222. The sixth switch 41, the seventh switch 42, and the eighth switch 43 are spaced apart by a predetermined distance. The sixth switch 41 is connected to one end of the second connecting part 2323, and the other end of the sixth switch 41 is connected to the... At the other end of the second connection 2323, one end of the seventh switch 42 is connected to the end of the third parallel arm 2321 near the second connection 2323, the seventh switch 42 is connected to the end of the fourth parallel arm 2322 near the second connection 2323, one end of the eighth switch 43 is connected to the end of the third parallel arm 2321 away from the second connection 2323, and the other end of the eighth switch 43 is connected to the end of the fourth parallel arm 2322 away from the second connection 2323. The control circuit controls the second stub switch assembly 4 to be turned on or off. The second stub switch assembly 4 is used to change the length of the second stub 232 connected to the main microstrip line 21.

[0025] Furthermore, when the first branch 231 is used to achieve the first target phase shift at the first frequency point, the control circuit controls the second switch 222, the third switch 31, and the fifth switch 33 to be turned on and the first switch 221 and the fourth switch 32 to be turned off; or, when the first branch 231 is used to achieve the first target phase shift at the second frequency point, the control circuit controls the second switch 222, the fourth switch 32, and the fifth switch 33 to be turned on and the first switch 221 and the third switch 31 to be turned off, and the length of the first branch 231 connected to the main microstrip line 21 at the first frequency point is longer than the length of the first branch 231 connected to the main microstrip line 21 at the second frequency point.

[0026] When the second branch 232 is used to achieve the second target phase shift at the first frequency point, the control circuit controls the first switch 221, the sixth switch 41, and the eighth switch 43 to be turned on, and the second switch 222 and the seventh switch 42 to be turned off. Alternatively, when the second branch 232 is used to achieve the second target phase shift at the second frequency point, the first switch 221, the seventh switch 42, and the eighth switch 43 are turned on, and the second switch 222 and the sixth switch 41 are turned off. The length of the second branch 232 connected to the main microstrip line 21 at the first frequency point is longer than the length of the second branch 232 connected to the main microstrip line 21 at the second frequency point.

[0027] Please see Figure 2 The microstrip line 2 further includes two signal lines 5. The microstrip phase shifter further includes a power divider 6 and an isolation resistor 7. One end of the power divider 6 is connected to the main microstrip line 21, and the other end of the power divider 6 includes two output ports 61. One output port 61 is connected to one of the signal lines 5. The power divider 6 is used to distribute the input signal of the main microstrip line 21 to the two signal lines 5. One end of the isolation resistor 7 is connected to one of the output ports 61, and the other end of the isolation resistor 7 is connected to the other output port 61. The isolation resistor 7 is used to isolate the signal. The corners of the signal lines 5 are chamfered to improve the impedance continuity of the microstrip line 2.

[0028] In some embodiments, the lengths of the first parallel arm 2311 and the second parallel arm 2312 are 9.2 mm, and the length of half the length of the first connecting portion 2313 plus the length of the first parallel arm 2311 is 16.9 mm; the lengths of the third parallel arm 2321 and the fourth parallel arm 2322 are 5 mm, and the length of half the length of the second connecting portion 2323 plus the length of the third parallel arm 2321 is 9 mm.

[0029] Please see Figure 4 , Figure 4 This is a state table of all phase-shiftable states of the microstrip phase shifter. As shown in the diagram, when the microstrip phase shifter is in state 1, both the first switch 221 and the second switch 222 are on. At this time, both the first stub 231 and the second stub 232 are short-circuited, and the microstrip phase shifter is in a non-phase-shifted state. When the microstrip phase shifter is in state 2, the control circuit controls the first switch 221, the sixth switch 41, and the eighth switch 43 to be on. At this time, the second stub 232 is connected to the main microstrip line 21, the first stub 231 is short-circuited, and the second stub 232 can achieve a 45° phase shift at 1.4 GHz. When the microstrip phase shifter is in state 3, the first switch 221, the seventh switch 42, and the eighth switch 43 are all on. At this time, the second stub 232... When the microstrip phase shifter is connected to the main microstrip line 21, the first stub 231 is shorted, and the second stub 232 can achieve a 45° phase shift at 2.3 GHz. When the microstrip phase shifter is in state 4, the control circuit controls the second switch 222, the third switch 31, and the fifth switch 33 to be turned on. At this time, the first stub 231 is connected to the main microstrip line 21, the second stub 232 is shorted, and the first stub 231 can achieve a 90° phase shift at 1.4 GHz. When the microstrip phase shifter is in state 5, the control circuit controls the second switch 222, the fourth switch 32, and the fifth switch 33 to be turned on. At this time, the first stub 231 is connected to the main microstrip line 21, the second stub 232 is shorted, and the first stub 231 can achieve a 90° phase shift at 2.3 GHz.

[0030] Please refer to the following: Figure 4 It should be noted that when both the first stub 231 and the second stub 232 are connected to the main microstrip line 21, the microstrip phase shifter can achieve a 135° phase shift at the target frequency point. When the microstrip phase shifter is in state 6, the control circuit controls the third switch 31, the fifth switch 33, the sixth switch 41, and the eighth switch 43 to be turned on. At this time, both the first stub 231 and the second stub 232 are connected to the main microstrip line 21, and the first stub 231 and the second stub 232 can achieve a 135° phase shift at 1.4GHz. When the microstrip phase shifter is in state 7, the control circuit controls the fourth switch 32, the fifth switch 33, the seventh switch 42, and the eighth switch 43 to be turned on, and the first stub 231 and the second stub 232 can achieve a 135° phase shift at 2.3GHz.

[0031] Please see Figure 5 , Figure 5 This is a schematic diagram of the 45° phase shift result of the microstrip phase shifter. With state 1 as the reference phase, point 3 in the diagram represents the second stub 232 achieving a 45° phase shift at 1.4GHz, and point 4 represents the second stub 233 achieving a 45° phase shift at 2.3GHz.

[0032] Please see Figure 6 , Figure 6 This is a schematic diagram of the result of a 90° phase shift in a microstrip phase shifter. With state 1 as the reference phase, point 3 in the diagram represents the first stub 231 achieving a 90° phase shift at 1.4 GHz, and point 4 represents the first stub 231 achieving a 90° phase shift at 2.3 GHz.

[0033] Please see Figure 7 , Figure 7 This is a schematic diagram of the 135° phase shift result of the microstrip phase shifter. With state 1 as the reference phase, point 3 in the diagram represents the 135° phase shift achieved by the first stub 231 and the second stub 232 at 1.4 GHz, and point 4 represents the 135° phase shift achieved by the first stub 231 and the second stub 232 at 2.3 GHz.

[0034] Please see Figure 8 , Figure 8This is a reference phase diagram for a microstrip phase shifter. When the second stub 232 is used to achieve a 45° phase shift at 1.4 GHz, the phase difference between the reference phase of 66.51° and the phase after the phase shift of 21.88° is 44.63°, and the difference from the target phase shift of 45° is -0.37°. When the second stub 232 is used to achieve a 45° phase shift at 2.3 GHz, the phase difference between the reference phase of -141.86° and the phase after the phase shift of 174.24° is 1. At 3.9°, the difference between the reference phase 66.51° and the phase shifted phase -23.65° and the target phase shift 45° is -1.1°; when the first stub 231 is used to achieve a 90° phase shift at 1.4GHz, the phase difference between the reference phase 66.51° and the phase shifted phase -23.65° is 90.16°, and the difference between the reference phase 66.51° and the phase shifted phase -23.65° and the target phase shift 90° is 0.16°; when the first stub 231 is used to achieve a 90° phase shift at 2.3GHz, the reference phase -141.86° and the phase shifted phase 128° are... The phase difference of 48° is 89.66°, and the difference from the target phase shift of 90° is -0.34°; when the first stub 231 and the second stub 232 are used to achieve a 135° phase shift at 1.4GHz, the phase difference between the reference phase of 66.51° and the phase shifted phase of -70.86° is 137.37°, and the difference from the target phase shift of 135° is 2.37°; when the first stub 231 and the second stub 232 are used to achieve a 135° phase shift at 2.3GHz... When the phase shift is 135°, the phase difference between the reference phase of -141.86° and the phase shifted phase of 83.19° is 135.19°. At this time, the difference from the target phase shift of 135° is 0.19°. It can be seen that the phase shift achieved by the microstrip phase shifter in this embodiment of the invention at the two frequency points of 1.4GHz and 2.3GHz is small compared with the target phase shift of 45°, 90° and 135°, indicating that the microstrip phase shifter achieves high accuracy in phase shifting.

[0035] This invention provides a microstrip phase shifter, comprising a dielectric substrate 1, a microstrip line 2, and a control circuit. The microstrip line 2 is disposed on the surface of the dielectric substrate 1. The microstrip line 2 includes a main microstrip line 21, a signal switching assembly 22, and a phase-shifting stub 23. The phase-shifting stub 23 is connected in parallel with the main microstrip line 21. The signal switching assembly 22 includes a first switch 221 and a second switch 222, both of which are connected to the main microstrip line 21. The phase-shifting stub 23 includes a first stub 231 and a second stub 232. The first switch 221 is disposed at the connection between the first stub 231 and the main microstrip line 21, and the second switch 222 is disposed at the second stub 232. At the connection point between 32 and the main microstrip line 21, the signal switch assembly 2 is connected to the control circuit. The control circuit controls the first switch 221 and the second switch 222 to be turned on or off. When the first stub 231 is used to achieve the first target phase shift, the control circuit controls the second switch 222 to be turned on and the first switch 221 to be turned off. The first stub 231 is connected to the main microstrip line 21, and the second stub 232 is short-circuited. When the second stub 232 is used to achieve the second target phase shift, the control circuit controls the first switch 221 to be turned on and the second switch 222 to be turned off. The second stub 232 is connected to the main microstrip line 21, and the first stub 231 is short-circuited. By connecting the first stub 231 or the second stub 232 to the main microstrip line 21, the target phase shift can be achieved, reducing the circuit area.

[0036] The present invention provides an electronic device (not shown in the figure) including the microstrip phase shifter described above. The structure and function of the microstrip phase shifter can be referred to the above embodiments, and will not be repeated here.

[0037] It should be noted that while the preferred embodiments of the present invention are given in the specification and accompanying drawings, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are not intended to impose additional limitations on the content of the present invention; their purpose is to provide a more thorough and comprehensive understanding of the disclosure of the present invention. Furthermore, the above-described technical features can be combined with each other to form various embodiments not listed above, all of which are considered to be within the scope of the present invention specification. Moreover, those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A microstrip phase shifter, characterized in that, include: Dielectric substrate; A microstrip line is disposed on the surface of the dielectric substrate. The microstrip line includes a main microstrip line, a signal switching assembly, and a phase-shifting stub. The phase-shifting stub is connected in parallel with the main microstrip line. The signal switching assembly includes a first switch and a second switch, both of which are connected to the main microstrip line. The phase-shifting stub includes a first stub and a second stub. The first switch is disposed at the connection between the first stub and the main microstrip line, and the second switch is disposed at the connection between the second stub and the main microstrip line. A control circuit is provided, wherein the signal switch assembly is connected to the control circuit, and the control circuit is used to control the first switch and the second switch to be turned on or off. When the first stub is used to achieve the first target phase shift, the control circuit controls the second switch to be turned on and the first switch to be turned off, the first stub is connected to the main microstrip line, and the second stub is short-circuited; When the second stub is used to achieve the second target phase shift, the control circuit controls the first switch to be turned on and the second switch to be turned off, the second stub is connected to the main microstrip line, and the first stub is short-circuited.

2. The microstrip phase shifter according to claim 1, characterized in that, The microstrip phase shifter further includes a first stub switch assembly, which includes a third switch, a fourth switch, and a fifth switch, and the first stub switch assembly is connected to the control circuit. The first branch is U-shaped. The third, fourth, and fifth switches are all connected to the first branch along the length of the U-shaped first branch. The third switch is adjacent to the fourth switch, and the fifth switch is located at the end of the first branch near the first switch. The three switches, the fourth switch, and the fifth switch are spaced apart by a preset distance. The control circuit controls the first branch switch assembly to be turned on or off. The first branch switch assembly is used to change the length of the first branch connected to the main microstrip line.

3. The microstrip phase shifter according to claim 2, characterized in that, When the first branch is used to achieve the first target phase shift at the first frequency point, the control circuit controls the second, third, and fifth switches to be turned on and the first and fourth switches to be turned off. Alternatively, when the first stub is used to achieve the first target phase shift at the second frequency point, the control circuit controls the second switch, the fourth switch, and the fifth switch to be turned on and the first switch and the third switch to be turned off. The length of the first stub connected to the main microstrip line at the first frequency point is longer than the length of the first stub connected to the main microstrip line at the second frequency point.

4. The microstrip phase shifter according to claim 2, characterized in that, The microstrip phase shifter also includes a second stub switch assembly, which includes a sixth switch, a seventh switch, and an eighth switch. The second stub switch assembly is connected to the control circuit. The second branch is U-shaped. The sixth, seventh, and eighth switches are all connected to the second branch along the length of the U-shaped second branch. The sixth switch is adjacent to the seventh switch, and the eighth switch is located at the end of the second branch near the second switch. The sixth, seventh, and eighth switches are spaced apart by a preset distance. The control circuit controls the second branch switch assembly to be turned on or off. The second branch switch assembly is used to change the length of the second branch connected to the main microstrip line.

5. The microstrip phase shifter according to claim 4, characterized in that... When the second branch is used to achieve the second target phase shift at the first frequency point, the control circuit controls the first switch, the sixth switch, and the eighth switch to be turned on, and the second switch and the seventh switch to be turned off. Alternatively, when the second stub is used to achieve the second target phase shift at the second frequency point, the first switch, the seventh switch, and the eighth switch are turned on, and the second switch and the sixth switch are turned off. The length of the second stub connected to the main microstrip line at the first frequency point is longer than the length of the second stub connected to the main microstrip line at the second frequency point.

6. The microstrip phase shifter according to claim 1, characterized in that... The microstrip line also includes two signal lines, and the microstrip phase shifter also includes a power divider. One end of the power divider is connected to the main microstrip line, and the other end of the power divider includes two output ports. One of the output ports is connected to one of the signal lines. The power divider is used to distribute the input signal of the main microstrip line to the two signal lines.

7. The microstrip phase shifter according to claim 5, characterized in that... The microstrip phase shifter also includes an isolation resistor, one end of which is connected to one of the output ports and the other end of which is connected to another of the output ports. The isolation resistor is used to isolate signals.

8. The microstrip phase shifter according to claim 1, characterized in that, The main microstrip line includes a first microstrip line, a second microstrip line, and a third microstrip line. One end of the first microstrip line is a signal input terminal. The other end of the first microstrip line is connected to one end of the second microstrip line. The other end of the second microstrip line is connected to one end of the third microstrip line. The other end of the third microstrip line is connected to one end of the power divider. The end of the first microstrip line near the second microstrip line, both ends of the second microstrip line, and the end of the third microstrip line near the second microstrip line are all chamfered. The first switch is located at the connection between the first microstrip line and the second microstrip line, and the second switch is located at the connection between the second microstrip line and the third microstrip line.

9. The microstrip phase shifter according to claim 7, characterized in that, The corners of the signal line are chamfered to improve the impedance continuity of the microstrip line.

10. An electronic device, characterized in that, Including the microstrip phase shifter as described in claims 1-9.

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