WO2012106903A1

WO2012106903A1 - Phase shifter

Info

Publication number: WO2012106903A1
Application number: PCT/CN2011/077327
Authority: WO
Inventors: 罗英涛; 肖伟宏
Original assignee: 华为技术有限公司
Priority date: 2011-07-19
Filing date: 2011-07-19
Publication date: 2012-08-16
Also published as: CN102369631A; CN102369631B

Abstract

Disclosed is a phase shifter, comprising a rotating arm and at least two suspended strip lines; the rotating arm is rotatable around a rotation point; the rotating arm comprises a plurality of coupling lines and at least one branch line; each coupling line is electrically coupled with a corresponding strip line, wherein at least one of the coupling lines is led out from the rotation point，and the coupling line is equipped with branch points; the branch line is led out from the branch point, extending to a next-level coupling line, and connecting with the next-level coupling line; the branch line is arranged above and below the coupling line. Using the embodiment of the present invention, it is easy to achieve power allocation and standing wave matching for each strip line.

Description

Phase shifter

The present invention relates to the field of communications technologies, and in particular, to a phase shifter for a base station antenna. Background technique

The phase shifter is a key component applied to the base station antenna and can change the beam scanning angle of the array antenna, that is, the downtilt angle. That is to say, the base station antenna can flexibly change the coverage of the antenna beam by adjusting the phase shift position of the phase shifter.

At present, the base station antenna phase shifter has two implementation modes: The first method is to insert a medium into the feeder line, change the dielectric constant of the transmission medium, and thereby change the wavelength of the electromagnetic wave, which is equivalent to the change of the electromagnetic wave travel, that is, the feed The change of the electrical phase; the second way is to change the length of the feeder line, directly increase or decrease the stroke of the electromagnetic wave, thereby achieving the change of the feed phase. The first way is to implement the cartridge, but due to the intervention of the medium, there will be a large amplitude variation and insertion loss of the feeder. The second method can reduce the loss of the feeder line and the amplitude variation is small.

Chinese patent CN00802132.5 and US Pat. No. 6,850,130 B1 disclose a high frequency phase shifter assembly having at least two curved strip conductor segments and a tap element device, the tap element device and a feed wire The connecting wire is electrically connected to the tapping points of the respective strip-shaped conductor segments through a plurality of connecting wires, and the respective strip-shaped conductor segments are respectively connected to the antenna radiators. The tap element assembly is rotated about its axis to adjust the phase angle of all antenna radiators. This phase shifter changes the phase by changing the length of the feeder line, and the loss of the feeder line is small. However, the phase shifter adjusts the power distribution of each antenna radiator by changing the width and width of the rotating pointer, and the power division ratio is difficult to realize, the power division flatness is not high enough; and the standing wave matching is difficult, and the bandwidth is not high enough. Summary of the invention

The embodiment of the invention provides a phase shifter, which can easily realize power distribution of each output port, and has high power division flatness; and it is easy to implement standing wave matching and increase bandwidth.

The phase shifter provided by the embodiment of the invention includes a rotating arm and at least two suspended belt lines; the rotating arm is rotatable about a rotation point;

The rotating arm includes a plurality of coupling lines and at least one branch line; each coupling line corresponds to one a line electrically coupled; wherein at least one of the coupling lines is drawn from the point of rotation, and the coupling line is provided with a branch point; the branch line is drawn from the branch point, extending to a coupling line of the next stage, and The first-order coupling lines are connected; the branch lines are distributed downward with respect to the coupling line.

Further, the branch line is a single-sided structure, and includes a branch line, the branch line is drawn from a branch point on the coupling line, and the branch line is located above or below the coupling line;

Or the branch line is a bilateral structure, including two branch lines; the two branch lines are respectively taken out from two branch points on the coupling line, or are taken out from the same branch point on the coupling line; the two branch lines are respectively Located above and below the coupling line.

According to the phase shifter provided by the embodiment of the present invention, the coupling lines corresponding to the respective strip lines are connected by the branch lines, and the branch lines increase the diversity of the matching branches, and the number, length, width, branch position, etc. of the branch lines can be changed. , to change the power ratio and power bandwidth of each segment of the line, easy to achieve power distribution of each output port, high power division flatness; Moreover, change the number of branches, length, width, branch position, etc., can also change each Standing wave with line, it is easy to achieve standing wave matching and increase bandwidth. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description For some embodiments of the present invention, other drawings may be obtained from those skilled in the art without departing from the drawings.

1 is a schematic structural view of a coupling line and a belt line according to Embodiment 1 of the present invention;

2 is a schematic structural view of a coupling line and a belt line according to Embodiment 2 of the present invention;

3 is a schematic structural view of a coupling line and a belt line according to Embodiment 3 of the present invention;

4 is a schematic structural view of a coupling line and a belt line according to Embodiment 4 of the present invention;

5 is a schematic structural diagram of a phase shifter according to Embodiment 5 of the present invention;

Figure 6 is a cross-sectional view of the phase shifter shown in Figure 5 taken along the A-A direction;

7 is a schematic structural diagram of a phase shifter according to Embodiment 6 of the present invention;

8 is a schematic structural diagram of a phase shifter according to Embodiment 7 of the present invention;

9 is a schematic structural diagram of a phase shifter according to Embodiment 8 of the present invention;

10 is a schematic structural diagram of a phase shifter according to Embodiment 9 of the present invention;

11 is a schematic structural diagram of a phase shifter according to Embodiment 10 of the present invention; FIG. 12 is a schematic structural diagram of a phase shifter according to Embodiment 11 of the present invention; FIG.

13 is a schematic structural diagram of a phase shifter according to Embodiment 12 of the present invention;

14 is a schematic structural diagram of a phase shifter according to Embodiment 13 of the present invention;

Figure 15 is a cross-sectional view of the phase shifter shown in Figure 14 taken along the line B-B;

16 is a schematic structural diagram of a phase shifter according to Embodiment 14 of the present invention;

Figure 17 is a cross-sectional view of the phase shifter shown in Figure 16 taken along the line C-C;

18 is a schematic structural diagram of a phase shifter according to Embodiment 15 of the present invention;

Figure 19 is a cross-sectional view of the phase shifter shown in Figure 18 taken along the line D-D;

20 is a schematic structural diagram of a phase shifter according to Embodiment 16 of the present invention;

FIG. 21 is a schematic structural diagram of a phase shifter according to Embodiment 17 of the present invention. detailed description

BRIEF DESCRIPTION OF THE DRAWINGS The technical solutions in the embodiments of the present invention will be described in detail with reference to the accompanying drawings. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative work are within the scope of the present invention.

The rotating arm includes a plurality of coupling lines and at least one branch line; each coupling line is correspondingly electrically coupled to a strip line; wherein at least one of the coupling lines is drawn from the rotation point, and the coupling line is provided with a branch point The branch line is drawn from the branch point and extends to the coupling line of the next stage, and is connected to the coupling line of the next stage; the branch line is distributed downward with respect to the coupling line.

In one embodiment, the branch line is a single-sided structure, including a branch line, the branch line is drawn from a branch point on the coupling line, and the branch line is located above or below the coupling line; In one embodiment, the branch line is a bilateral structure, including two branch lines; the two branch lines are respectively taken out from two branch points on the coupling line, or are taken out from the same branch point on the coupling line; The branch lines are respectively located above and below the coupling line.

The coupling line includes a coupling member and an arm; the coupling member is a member electrically coupled to the belt, the arm is coupled to the coupling member; and the branch point is disposed on an arm of the coupling line.

Alternatively, the coupling line includes a coupling member; the branch point is provided on the coupling member. The phase shifter provided by the embodiment of the invention further includes a cavity, and the rotating arm and the strip line are disposed in the cavity, and the strip line is in a suspended state. The structure of the coupled line and the strip line will be described in detail below with reference to FIGS. 1 to 4.

1 is a schematic structural view of a coupling line and a strip line according to Embodiment 1 of the present invention.

The strip line 10 is a single layer strip line, and the coupling line 20 is electrically coupled to the strip line 10. Wherein, the coupling line 20 includes a coupling member 201 and an arm 202; the coupling member 201 is a portion electrically coupled to the strip 10, and the arm 202 is coupled to the coupling member 201. The coupling member 201 is a bilateral coupling member, and the belt line 10 is interposed between the bilateral coupling members 201.

Referring to FIG. 2, it is a schematic structural diagram of a coupling line and a strip line according to Embodiment 2 of the present invention.

The second embodiment differs from the first embodiment described above in that the coupling member 201 is a one-sided coupling member, and the single-layer strip line 10 is located above or below the one-side coupling member 201.

FIG. 3 is a schematic structural diagram of a coupling line and a strip line according to Embodiment 3 of the present invention.

Compared with the first embodiment described above, the third embodiment differs in that: the strip line 10 is a double-layer strip line, including an upper layer strip line 101 and a lower layer strip line 102; and the coupling member 201 electrically coupled to the strip line 10 is a single The side coupling member is sandwiched between the upper belt line 101 and the lower belt line 102.

Referring to FIG. 4, it is a schematic structural diagram of a coupling line and a strip line provided in Embodiment 4 of the present invention.

Compared with the third embodiment described above, the difference of the fifth embodiment is that the strip line 10 includes an upper layer strip line.

101 and the lower strip line 102; the upper strip line 101 and the lower strip line 102 are joined to form a U-shaped structure.

It should be noted that the above-mentioned first to fourth embodiments are only described by taking the coupling line including the coupling member 201 and the arm 202 as an example. In the specific implementation, the coupling line can omit the arm 202 and only the coupling member 201.

The phase shifter provided by the embodiment of the invention can change the impedance of the strip line by changing the electric coupling mode of the coupling line and the strip line, change the power ratio and the standing wave of each strip line, and easily realize the power distribution of each strip line and The standing wave matches to increase the bandwidth. The phase shifter provided by the embodiment of the invention can also change the power ratio and the standing wave of each line with a line by changing the number, length, width, branch position, etc. of the branch lines, thereby realizing the power distribution and station of each line. Wave matching.

The structure of the phase shifter provided by the embodiment of the present invention will be described in detail below with reference to FIG. 5 to FIG. Referring to FIG. 5, it is a schematic structural diagram of a phase shifter according to Embodiment 5 of the present invention. The phase shifter provided in the fifth embodiment includes two arc-shaped strip lines, which are a first strip line 11 and a second strip line 12, respectively. The center of the first strip line 11 and the second strip line 12 are on the same axis of rotation as the point of rotation 0, and the axis of rotation is perpendicular to the first strip line 11 and the second strip line 12. More specifically, the axis of rotation is the axis passing through the point of rotation 0 and perpendicular to the plane of the two strip lines, the two strip lines being arranged coaxially.

The radius of the first strip line 11 is smaller than the radius of the second strip line 12, and the first strip line 11 is located within the arc of the second strip line 12. Specifically, as shown in FIG. 5, with the axis MN passing through the rotation point 0 as a boundary line, the first belt line 11 and the second belt line 12 are on the same side, and are arranged offset from each other.

The swivel arm 2 has a feed input port that is connected to the feed input lead input shown in FIG. The rotating arm 2 is overlapped on the two belt lines, and the rotating arm 2 is rotatable about the rotation point 0. Preferably, the feed input port is disposed adjacent to the rotation point 0.

As shown in FIG. 5, the phase shifter provided in this embodiment further includes a cavity 5, and the rotating arm 2, the first strip line 11 and the second strip line 12 are disposed in the cavity 5, and the two strip lines are suspended. .

As shown in Fig. 6, it is a cross-sectional view of the phase shifter shown in Fig. 5 along the A-A direction. The swivel arm 2 includes a first coupling line 21, a second coupling line 22, and a first branch line 31.

The first coupling line 21 is taken from the rotation point 0 and electrically coupled to the first belt line 11. The first coupling line 21 and the first strip line 11 are in the bilateral electrical coupling manner of the above-described first embodiment.

A branch point 41 is disposed on the arm of the first coupling line 21, and the first branch line 31 is drawn from the branch point 41, extends across the first strip line 11 to the second coupling line 22, and the second coupling line 22 connection. The second coupling line 22 is electrically coupled to the second strip line 12 in a bilateral electrical coupling manner as described above.

Specifically, the branch line 31 is a bilateral structure including a branch line 301 and a branch line 302; the two branch lines are led out from the branch point 41 on the first coupling line 21, and connected to the arm of the second coupling line 22; the branch line 301 and the branch line 302 Located above and below the first coupling line 21, respectively.

As shown in FIG. 5, the two ends of the first strip line 11 are respectively provided with output ports P2 and P3, and the two ends of the second strip line 12 are respectively provided with output ports P1 and P4. In specific implementation, the output ports P1, P2, P3, and P4 are respectively connected to the antenna units R1, R2, R3, and R4 through feed lines.

When the rotating arm 2 rotates around the rotation point 0, the phase from the feeding input end to the four output ports can be changed, and the phases of the output ports P1, P2, P3, and P4 are continuously changed, thereby changing the antenna units R1, R2, and R3. , the phase of R4, to achieve beam scanning of the antenna.

In the specific implementation, by changing the ratio of the radius of the arc of the strip line, the proportion of the phase change of each output port can be changed. For example, as shown in FIG. 5, the radius of the arc of the first strip line 11 is rl, and the second strip line The arc radius of 12 is r2. If rl :r2=l :2 , the phase of the output port P1, P2, P3, and P4 is -2 α : - : α : 2 α. If rl : r2 = l : 3 , the phase of the output ports P1, Ρ 2, Ρ 3, and Ρ 4 is -3 : - : α : 3 α. Wherein, the phase of the feed input point input is 0.

The phase shifter provided in this embodiment extends from the rotation point to the first coupling line, and the second coupling line is connected to the first coupling line through the branch line, and the branch line increases the diversity of the matching branches, by changing the two branches The length, width, and position of the branch points of the branch line can change the impedance of the two strip lines, thereby changing the power ratio and power bandwidth of the two strip lines, and easily realizing the power distribution of each output port, and the power division flatness is high; In addition, by changing the length, width, and position of the branch points of the two branch lines of the branch line, it is also possible to change the standing wave of the two lines with the line, and it is easy to achieve standing wave matching and increase the bandwidth. Referring to FIG. 7, FIG. 7 is a schematic structural diagram of a phase shifter according to Embodiment 6 of the present invention.

Compared with the fifth embodiment, the sixth embodiment is different in that: the second coupling line 22 and the second strip line 12 are electrically coupled, and the double-layer strip-line electrical coupling method of the fourth embodiment is adopted. FIG. 8 is a schematic structural diagram of a phase shifter according to Embodiment 7 of the present invention.

Compared with the fifth embodiment, the seventh embodiment is different in that the branch line 31 is a single-sided structure and includes a branch line; the branch line is led out from the branch point 41 on the first coupling line 21, and is connected to the second line. Coupling on the arm of the wire 22. The branch line is distributed up and down with the first coupling line 21, and the branch line may be located above or below the first coupling line 21.

Compared with the fifth embodiment described above, the seventh embodiment changes the number of branch lines of the branch line, thereby changing the impedance of the two lines, thereby adjusting the power division ratio and the standing wave of the two lines. Referring to FIG. 9, FIG. 9 is a schematic structural diagram of a phase shifter according to Embodiment 8 of the present invention.

Compared with the seventh embodiment, the eighth embodiment is different in that: the first coupling line 21 is electrically coupled to the first strip line 11, and the second coupling line 22 and the second strip line 12 are electrically coupled. Both adopt the one-side coupling method of the above implementation two. Referring to FIG. 10, it is a schematic structural diagram of a phase shifter according to Embodiment 9 of the present invention.

Compared with the fifth embodiment described above, the difference of the ninth embodiment is that: the first coupling line 21 is provided with two different branch points, which are a branch point 41 and a branch point 42, respectively. Branch line 31 is a bilateral structure, package A branch line 301 and a branch line 302 are included. The branch line 301 is taken from the branch point 41 and connected to the arm of the second coupling line 22; the branch line 302 is taken out from the branch point 42 and connected to the arm of the second coupling line 22; the branch line 301 and the branch line 302 are respectively located at the first coupling Above and below the line 21, they are distributed up and down. Further, the second coupling line 22 and the second strip line 12 are electrically coupled to each other by the double-layer strip-line electrical coupling method of the above-described fourth embodiment.

Compared with the fifth embodiment described above, the seventh embodiment changes the branch point position of the branch line, thereby changing the impedance of the two strip lines, thereby adjusting the power division ratio and the standing wave of the two strip lines. Referring to FIG. 11, FIG. 11 is a schematic structural diagram of a phase shifter according to Embodiment 10 of the present invention.

Compared with the above-described embodiment 9, the tenth embodiment is different in that a medium 50 is disposed on the periphery of the second strip line 12.

In a specific implementation, the phase shifter further includes a cavity 5, and the rotating arm and the strip line are disposed in the cavity 5. A medium is provided on the periphery of the strip line, and the medium is filled between the strip line and the cavity.

The phase shifter provided in this embodiment changes the environment of the strip line by adding a medium on the strip line, and increases the dielectric constant, thereby reducing the size of the strip line and satisfying the requirement of phase shifting amount. Referring to FIG. 12, it is a schematic structural diagram of a phase shifter according to Embodiment 11 of the present invention.

Compared with the fifth embodiment described above, the eleventh embodiment differs in that: the second coupling line 22 only includes a coupling member, which is a bilateral coupling structure. The first branch line 31 includes two branch lines, both of which are taken from the branch point 41 and connected to the second coupling line 22, respectively. Referring to FIG. 13, FIG. 13 is a schematic structural diagram of a phase shifter according to Embodiment 12 of the present invention.

Compared with the eleventh embodiment, the difference of the twelfth embodiment is that: the two branch lines of the first branch line 31 are all taken out from the branch point 41, respectively crossing the upper and lower sides of the first coupling line 21, and Confluence; the second coupling line 22 is connected at the junction of the two branches. FIG. 14 is a schematic structural diagram of a phase shifter according to Embodiment 13 of the present invention.

Compared with the fifth embodiment described above, the difference of the thirteenth embodiment is that the phase shifter further includes a third strip line 13 having an arc shape; the center of the third strip line 13 is located on the rotation axis. That is, the first strip line 11, the second strip line 12, and the third strip line 13 are coaxially disposed. The radius of the third strip line 13 is greater than the radius of the second strip line 12, and the first strip line 11 and the second strip line 12 are located within the arc of the third strip line 13. Specific, such as As shown in Fig. 14, the first belt line 11, the second belt line 12, and the third belt line 13 are located on the same side with the boundary line MN passing through the rotation point O as a boundary line.

As shown in Fig. 15, it is a sectional view of the phase shifter shown in Fig. 14 in the B-B direction. The swivel arm 2 also includes a second branch line 32 and a third coupling line 23. The connection point of the first branch line 31 and the second coupling line 22 is a branch point 43 , and the second branch line 32 is drawn from the branch point 43 , extends across the second strip line 12 , and extends to the third coupling line 23 , and is coupled to the third The line 23 is connected; the third coupling line 23 is electrically coupled to the third strip line 13 by the bilateral electrical connection method of the above-described first embodiment.

In another embodiment, a branch point may also be disposed at a connection point adjacent to the first branch line 31 and the second coupling line 22, and the second branch line 32 is drawn from the branch point, crossing the second strip line 12 And extending to the third coupling line 23, the connection with the third coupling line 23.

As shown in Fig. 14, the two ends of the third strip line 13 are respectively provided with output ports P5, P6. In specific implementation, the output ports P5 and P6 are respectively connected to the antenna unit through the feeding wires. The phase shifter provided in the thirteenth embodiment has six output ports, and the rotary arm 2 rotates around the rotation point 0 to change the phase from the feed input terminal to the output ports P1, P2, P3, P4, P5, P6.

In the phase shifter provided in this embodiment, the first branch line 31 and the second branch line 32 increase the diversity of the matching branches. The length of the branch lines, the width, the position of the branch points, etc. of the two branch lines can be changed, and the three segments can be changed. With the impedance of the line, thus changing the power ratio and power bandwidth of the three-segment line, it is easy to realize the power distribution of the six output ports, and the power division flatness is high; in addition, by changing the branch length, width, and branch point of the two branch lines The position, etc., can also change the standing wave of the three-segment line, and it is easy to achieve standing wave matching and increase the bandwidth.

In a specific implementation, according to the actual needs, the fourth strip line and the fifth strip line N strip line are sequentially added according to the manner of adding the third strip line in the thirteenth embodiment. Referring to FIG. 16, FIG. 16 is a schematic structural diagram of a phase shifter according to Embodiment 14 of the present invention.

Compared with the fifth embodiment, the fourteenth embodiment is different in that: the phase shifter further includes an arc-shaped third strip line 13; the center of the third strip line 13 is located on the rotation axis, that is, the first The belt line 11, the second belt line 12, and the third belt line 13 are coaxially disposed.

As shown in FIG. 16, the rotation point 0 is located at the intermediate portion of the rotary arm 2. With the rotation point 0 as the boundary point, the coupling line extends along both ends. That is, the first strip line 11 and the second strip line 12 are on the same side of the boundary line MN, and the third strip line 13 is on the other side of the boundary line MN. As shown in Fig. 17, it is a cross-sectional view of the phase shifter shown in Fig. 16 in the CC direction. The rotating arm 2 further includes a third coupling line 23, which is drawn from the rotation point 0 in a direction opposite to the first coupling line 21; the arm of the third coupling line 23 and the first coupling line 21 The arm branches intersect at a rotation point 0; the third coupling line 23 and the third strip line 13 are bilaterally electrically coupled.

It should be noted that the fourteenth embodiment is described by taking only the third coupling line 23 from the rotation point and forming a 180 degree angle with the first coupling line 21. In a specific implementation, the angle between the third coupling line 23 and the first coupling line 21 may be 90-180.

As shown in Fig. 16, the two ends of the third strip line 13 are respectively provided with output ports P5, P6. In specific implementation, the output ports P5 and P6 are respectively connected to the antenna unit through the feeding wires. The phase shifter provided in the fourteenth embodiment has six output ports, and the rotary arm 2 is rotated about the rotation point 0 to change the phase from the feed input terminal to the output ports P1, P2, P3, P4, P5, P6. Referring to FIG. 18, it is a schematic structural diagram of a phase shifter according to Embodiment 15 of the present invention.

Compared with the above-mentioned fourteenth embodiment, the fifteenth embodiment is different in that: the phase shifter further includes an arc-shaped fourth strip line 14; the center of the fourth strip line 14 is located on the rotation axis, that is, The first strip line 11, the second strip line 12, the third strip line 13, and the fourth strip line are coaxially disposed.

As shown in Fig. 18, the rotation point 0 is located at the intermediate portion of the rotary arm 2. With the rotation point 0 as the boundary point, the coupling line extends along both ends. The radius of the fourth strip line 14 is greater than the radius of the third strip line 13, and the third strip line 13 is located within the arc of the fourth strip line 14, that is, the first strip line 11 and the second strip line 12 are at the boundary line MN. One side, and the third strip line 13 and the fourth strip line 14 are on the other side of the dividing line MN.

As shown in Fig. 19, it is a cross-sectional view of the phase shifter shown in Fig. 18 in the D-D direction. The rotating arm 2 further includes a third branch line 33 and a fourth coupling line 14; a branch point 44 is provided on the arm of the third coupling line 23; the third branch line 33 is drawn from the branch point 44, across the third belt The line 13 extends to the fourth coupling line 24 and is connected to the fourth coupling line 24; the fourth coupling line 24 is electrically coupled to the fourth strip line 14, using the bilateral electrical coupling method of the above-described implementation.

As shown in Fig. 18, the two ends of the fourth strip line 14 are respectively provided with output ports P7, P8. In specific implementation, the output ports P7 and P8 are respectively connected to the antenna unit through the feeding wires. The phase shifter provided in the fifteenth embodiment has eight output ports, and the rotating arm 2 rotates around the rotation point 0, and can change from the feed input end to the output ports P1, P2, P3, P4, P5, P6, P7, P8. Phase.

In the phase shifter provided in this embodiment, the first branch line 31 and the third branch line 33 add matching branches Diversification, by changing the length of the branch line, the width of the two branch lines, the position of the branch point, etc., the impedance of the four-segment line can be changed, thereby changing the power ratio and power bandwidth of the four-segment line, and easily achieving eight output ports. The power distribution has a high degree of power division flatness. In addition, by changing the length, width, and position of the branch points of the two branch lines, it is also possible to change the standing wave of the four-segment line, and it is easy to achieve standing wave matching and increase the bandwidth. . In the phase shifter provided by the embodiment of the present invention, each of the strip lines may be on the same plane. For example, in the phase shifters provided in the above fifth to fifteenth embodiments, the strip lines are concentrically arranged on the same plane. In addition, the individual strip lines of the phase shifter can also be on different planes.

Referring to FIG. 20, it is a schematic structural diagram of a phase shifter according to Embodiment 16 of the present invention. The first strip line 11 and the second strip line 12 are vertically distributed, and the two strip lines are respectively on different planes. Referring to FIG. 21, it is a schematic structural diagram of a phase shifter according to Embodiment 17 of the present invention.

The phase shifter provided by the embodiment of the invention may have a curved line structure of a circular arc shape, a zigzag shape or a wave shape. For example, as shown in Fig. 21, the first strip line 11 has a circular arc structure, and the second strip line 12 and the third strip line 13 have a sawtooth curve structure.

Since the fold line (the zigzag line or the wavy line) can increase the physical path of the strip line, which is equivalent to the strip line of the large arc, this embodiment can reduce the size of the phase shifter by changing the structure and distribution of the strip line. The phase shifter provided by the embodiment of the invention has the following beneficial effects:

(1) It is easy to achieve power distribution, and the power division flatness is high.

The coupling line corresponding to each strip line is connected by a branch line, which increases the diversity of matching branches, and can change the power ratio of each line by changing the number, length, width, branch position, etc. of the branch lines. And power bandwidth, easy to achieve power distribution of each output port, high power division flatness. In addition, the power ratio of each segment of the strip can be changed by changing the electrical coupling between the coupled line and the strip.

(2) It is easy to achieve standing wave matching and increase bandwidth.

The coupling line corresponding to each strip line is connected by a branch line, which increases the diversity of matching branches, and can change the standing wave of each strip line by changing the number, length, width, branch position, etc. of the branch lines, which is easy Realize standing wave matching and increase bandwidth. In addition, it is also possible to change the standing wave of each line with a line by changing the electrical coupling between the coupled line and the strip line. (3) It is possible to reduce the size of the phase shifter.

By adding a medium to the strip line to change the strip line environment and increasing the dielectric constant, the size of the strip line can also be reduced to meet the phase shift requirement. Moreover, the belt line has a sawtooth curve structure, which can reduce the size of the phase shifter.

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present invention. These improvements and retouchings are also considered. It is the scope of protection of the present invention.

Claims

Rights request

What is claimed is: 1. A phase shifter, comprising: a rotating arm and at least two suspended belt lines; the rotating arm being rotatable about a rotation point;

2. The phase shifter according to claim 1, wherein the branch line is a single-sided structure including a branch line, the branch line is taken out from a branch point on the coupling line, and the branch line is located Above or below the coupling line;

3. The phase shifter according to claim 2, wherein the coupling line includes a coupling member and an arm; the coupling member is a member electrically coupled to the belt, the arm and the coupling member Connecting; the branch point is disposed on the arm of the coupling line;

Alternatively, the coupling line includes a coupling member; the branch point is provided on the coupling member.

4. The phase shifter according to claim 3, wherein the strip line is a single layer strip line; the coupling member electrically coupled to the strip line is a bilateral coupling member, and the strip line is sandwiched between Between the bilateral coupling components;

Alternatively, the coupling member electrically coupled to the strip line is a one-sided coupling member, and the strip line is located above or below the one-sided coupling member.

The phase shifter according to claim 3, wherein the strip line is a double-layer strip line, including an upper layer strip line and a lower layer strip line;

a coupling member electrically coupled to the strip line is a one-sided coupling member, and the one-sided coupling member is interposed Between the upper layer line and the lower layer line.

The phase shifter according to claim 4 or 5, wherein the phase shifter comprises two arc-shaped strip lines, which are a first strip line and a second strip line, respectively;

The center of the first strip line and the second strip line are on the same axis of rotation as the rotation point, and the rotation axis is perpendicular to the first strip line and the second strip line;

The radius of the first strip line is smaller than the radius of the second strip line, and the first strip line is located within an arc of the second strip line.

The phase shifter according to claim 6, wherein the rotating arm includes a first coupling line, a second coupling line, and a first branch line;

The first coupling line is drawn from the rotation point and electrically coupled to the first strip line; and the first coupling line is provided with a branch point;

The first branch line is drawn from the branch point, extends across the first strip line, to the second coupling line, and is connected to the second coupling line; the second coupling line and the second The second line is electrically coupled.

8. The phase shifter according to claim 7, wherein the phase shifter further comprises a third strip line having an arc shape; a center of the third strip line is located on the rotation axis.

The phase shifter according to claim 8, wherein a radius of the third strip line is greater than a radius of the second strip line; the first strip line and the second strip line are located at the first Within the arc of the three-belt line; the rotating arm further includes a second branch line and a third coupling line; the third coupling line is electrically coupled to the third strip line;

a connection point of the first branch line and the second coupling line is a branch point, the second branch line is drawn from the branch point, across the second strip line, and extends to the third coupling a line, connected to the third coupling line;

Or, at a connection point adjacent to the first branch line and the second coupling line, a branch point is set, the second branch line is drawn from the branch point, extends across the second strip line, and extends to The third coupling line is connected to the third coupling line.

10. The phase shifter according to claim 8, wherein said rotating arm further comprises a third coupling line; said third coupling line is drawn from said rotation point, and said: said three coupling lines and said The angle between the first coupling lines is 90-180; the third coupling line is electrically connected to the first line.

The phase shifter according to claim 10, wherein the phase shifter further comprises a fourth strip line having an arc shape; a center of the fourth strip line is located on the rotation axis; a radius of the fourth strip line is greater than a radius of the third strip line, and the third strip line is located within an arc of the fourth strip line;

The rotating arm further includes a third branch line and a fourth coupling line;

The third coupling line is provided with a branch point; the third branch line is drawn from the branch point, extends across the third strip line, extends to the fourth coupling line, and is connected to the fourth coupling line The fourth coupling line is electrically coupled to the fourth strip line.

The phase shifter according to any one of claims 1 to 5, wherein the strip line is a circular arc, a zigzag or a wavy curved structure.

The phase shifter according to any one of claims 1 to 5, wherein the phase shifter further comprises a cavity, and the rotating arm and the strip line are disposed in the cavity;

A periphery of the strip line is provided with a medium filled between the strip line and the cavity.