CN213878351U

CN213878351U - High-frequency slow wave one-to-nine phase shifter with filtering characteristic

Info

Publication number: CN213878351U
Application number: CN202022797964.7U
Authority: CN
Inventors: 杨彬; 王徐军; 卜安涛; 苏学伟
Original assignee: Nanjing Aby Rf Technology Co ltd
Current assignee: Nanjing Aby Rf Technology Co ltd
Priority date: 2020-11-27
Filing date: 2020-11-27
Publication date: 2021-08-03
Anticipated expiration: 2030-11-27

Abstract

The utility model discloses a take filtering characteristic's high frequency slow wave one-to-nine looks ware, including one-to-nine high frequency board PCB, rotary sliding vane and backing plate, the three can constitute one-to-nine phase shift merit through fixed coupling feed mode and divide the network, and the accessible can be connected with basic station antenna radiating element with radio frequency coaxial cable, constitutes nine units or eighteen unit array antenna. An open-circuit branch knot is arranged on a microstrip main transmission line, connected with an input port, of a circle center line on a one-to-nine high-frequency board PCB substrate, four concentric-circle microstrip bending arc arms are arranged on the same side of the circle center line, four concentric-circle microstrip arc arms are arranged on the same side of the circle center line on a rotary sliding-vane substrate, and the positions of the microstrip bending arc arms and the positions of the microstrip arc arms are overlapped. The utility model discloses an increase the branch knot of opening a way and carry out filtering to the high frequency, reduce the coupling between the high low frequency, have very big promotion to antenna performance. And the utility model discloses simple structure, size are little, do benefit to wiring, low cost, be fit for mass production.

Description

High-frequency slow wave one-to-nine phase shifter with filtering characteristic

Technical Field

The utility model belongs to the wireless communication field relates to a base station antenna is with high frequency slow wave (1710Mhz-2170Mhz) one minute nine phase shifters of taking filtering characteristic.

Background

With the rapid development of mobile communication, the complexity of the coverage environment of the base station cell varies, so that more and more antennas are needed for the base station to cover the cell. Different frequencies cover the same environment with different coverage effects, which causes the problems of antenna installation plane resource shortage, construction and maintenance cost increase and the like to be increasingly prominent. The high-low frequency electrically-tuned antenna concentrates low frequency and high frequency on the same antenna, so that the size is small, the frequency bands of the low frequency and the high frequency can be simultaneously met, and the cost of the base station is greatly reduced. Therefore, a nine-in-one phase-shifting power distribution network for the base station antenna is needed to be provided, and the base station antenna can be connected with the base station antenna radiation unit through a radio frequency coaxial cable so as to effectively filter low-frequency signal waves of the array antenna and reduce coupling between high frequency and low frequency.

SUMMERY OF THE UTILITY MODEL

The purpose of the invention is as follows: an object of the utility model is to provide a base station antenna is with high frequency slow wave one in nine looks shifters of band filtering characteristic, solves the high low frequency coupling problem of feed network of gain and high gain array antenna in the basic station antenna, can effectively filter out the low frequency signal wave, reduces the coupling between the high low frequency to promote the antenna performance.

The technical scheme is as follows: in order to achieve the above purpose, the utility model adopts the following technical scheme:

a high-frequency slow wave one-to-nine phase shifter with filtering characteristics comprises a one-to-nine high-frequency PCB, a rotating slide sheet and a base plate; the one-to-nine high-frequency board PCB comprises a first dielectric substrate, wherein a first circle center line is arranged on the first dielectric substrate, the first circle center line is connected with an input port through a microstrip main transmission line, and an open-circuit branch is arranged on the microstrip main transmission line connected with the input port through the first circle center line; four concentric circle microstrip bending arc arms are arranged on the same side of the first circle center line, the circle centers of the four concentric circle microstrip bending arc arms are arranged on the first circle center line, two ends of each concentric circle microstrip bending arc arm are respectively connected with an output port through microstrip lines, and the first circle center line is led out in the direction opposite to the input port to be connected with an output port through microstrip lines; the rotary slip sheet comprises a second medium substrate, a second circle center line is arranged on the second medium substrate, four concentric circle micro-strip arc arms are arranged on the same side of the second circle center line, the circle centers of the four concentric circle micro-strip arc arms are arranged on the second circle center line, and the second circle center line is communicated with the four micro-strip arc arms sequentially through the micro-strip lines; the four concentric circle micro-strip bending arc arms correspond to the four concentric circle micro-strip arc arms one by one in position and are consistent in radius.

The radius ratio of the four concentric circle micro-strip bending arc arms from inside to outside is 1: 2: 3: 4.

coating green oil on the one-to-nine high-frequency PCB and the rotary sliding vane; and the one-to-nine high-frequency PCB is fixed with a base plate and then feeds power to the rotary slide sheet in a green oil isolation signal coupling mode.

The rotary sliding sheet can rotate according to a second circle center line, so that the phases of eight ports led out by four concentric circle microstrip bending arc arms on a one-to-nine high-frequency PCB are changed.

The first dielectric substrate is arranged at the input port and the nine output ports, and the back surface and the front surface of the substrate are communicated through the metallized through holes.

Has the advantages that: the utility model discloses a take high frequency slow wave one minute nine of filter characteristic to move looks ware can be connected with basic station antenna radiating element through radio frequency coaxial cable, constitutes nine units (each radiating element connects nine output ports that one minute nine moved the looks ware respectively) or eighteen units (every two radiating elements merge the back and receive nine output ports that one minute nine moved the looks ware respectively) array antenna. The utility model provides a medium gain (nine units) of base station antenna and high gain (eighteen units) array antenna's the high low frequency coupling problem of feed network, come to filter the high frequency through increasing the branch knot of opening a way to move looks ware at equal area has increased filtering function, can be under the condition that does not increase the wave filter, can effectually filter out the low frequency signal wave, reduce the coupling between the high low frequency, all have very big promotion to the standing wave of antenna, intermodulation and gain. And the utility model has the advantages of simple structure, the size is little, do benefit to wiring, low cost, be fit for mass production.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a one-in-nine high frequency board PCB according to an embodiment of the present invention;

fig. 3 is a schematic structural view of FR4 rotary sliding piece in the embodiment of the present invention;

fig. 4 is a schematic structural diagram of an FR4 backing plate in an embodiment of the present invention.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1, the embodiment of the utility model discloses a take high frequency slow wave one in nine phase shifters of filtering characteristic, including one in nine high frequency boards PCB (fig. 2), one FR4 rotary sliding vane (fig. 3), one FR4 backing plate (fig. 4), the three can form a nine power branches feed network that moves through the fixed coupling feed mode, uses the utility model discloses a feed network can be used to nine array elements and eighteen array elements' medium or high gain array.

As shown in fig. 2, one-to-nine high-frequency board PCB1 includes a first dielectric substrate 101, a first circle center line 102 is disposed on the first dielectric substrate 101, a microstrip main transmission line led out of the first circle center line 102 is connected to an input port, and an open-circuit branch 107 is disposed on the microstrip main transmission line. The first center line 102 leads out the microstrip line 108 in the direction opposite to the input port to be connected with the output port P5. Four concentric-circle microstrip bent arc arms (a first microstrip bent arc arm 103, a second microstrip bent arc arm 104, a third microstrip bent arc arm 105 and a fourth microstrip bent arc arm 106) are arranged on the same side of the first circle center line 102, and two ends of the four concentric-circle microstrip bent arc arms are respectively connected with an output port through microstrip lines, namely P1 and P9, P2 and P8, P3 and P7, P4 and P6 from top to bottom. The centers of four concentric circle microstrip

bending arc arms

103, 104, 105, 106 are on the first center line 102, and simultaneously, the first microstrip bending arc arm 103: second microstrip curved arc arm 104: third microstrip curved arc arm 105: the radius ratio of the fourth microstrip bending arc arm 106 is 1: 2: 3: 4, the back surface and the front surface of the first dielectric substrate 101 can be conducted through the metallized through hole 109, the back surface and the front surface of the first dielectric substrate 101 are coated with green oil for corrosion prevention and isolation, a nineteen-in-one high-frequency board PCB (shown in figure 2) is fixed with a backing plate (shown in figure 4) and then is in direct contact with a circuit on an FR4 rotating slide sheet (shown in figure 3), and the third-order intermodulation index of the base station antenna is solved.

As shown in fig. 3, FR4 rotary sliding vane 2 includes a second dielectric substrate 201, a second circle center line 202 is disposed on the second dielectric substrate 201, four concentric microstrip arc arms (a first microstrip arc arm 203, a second microstrip arc arm 204, a third microstrip arc arm 205, and a fourth microstrip arc arm 206) are disposed on the same side of the second circle center line 202, the centers of the four concentric microstrip arc arms 203,204, 205, and 206 are disposed on the second circle center line 202, and the second circle center line 202 and the microstrip arc arms 203,204, 205, and 206 are sequentially conducted through

microstrip lines

207, 208, 209, and 210. The positions of the microstrip bent arc arms 103,102 and the positions of the

microstrip arc arms

203 and 204 are in one-to-one correspondence, the radiuses are consistent, and a larger phase shift amount is obtained by bending the microstrip lead, so that the area is reduced.

A nine-in-one high-frequency board PCB filters low frequency through open-circuit branches, and therefore the phase shifter with the same area is added with a filtering function. The low-frequency signal wave can be effectively filtered under the condition that a filter is not added, the coupling between high frequency and low frequency is reduced, and the standing wave, the intermodulation and the gain of the antenna are greatly improved.

Microstrip circular arc arms in one-to-nine high-frequency board PCBs 1 and FR4 rotary sliding pieces coincide with a circle center line, and the phase difference can be generated by one-to-nine phase-shifting power distribution network through rotating the FR4 rotary sliding pieces around the circle center: 4 Δ: 3 Δ: 2 Δ:1 Δ: 0 Δ: -1 Δ: -2 Δ: -3 Δ: -4 Δ, wherein Δ is a phase value.

The medium substrate, the microstrip arc arm and the microstrip line of the one-to-nine high-frequency board PCB and the FR4 rotary sliding piece are respectively covered with a thin insulating layer, such as green oil, so that the one-to-nine high-frequency board PCB and the FR4 rotary sliding piece can be effectively separated, an energy signal can be transmitted to the FR4 rotary sliding piece through coupling, friction between the one-to-nine high-frequency board PCB and the FR4 rotary sliding piece is effectively avoided, and meanwhile, the three-order intermodulation signal generation inhibiting effect is good.

Claims

1. The utility model provides a high frequency slow wave one-to-nine looks ware of band-pass filter characteristic which characterized in that: the device comprises a one-to-nine high-frequency PCB, a rotary sliding sheet and a base plate; the one-to-nine high-frequency board PCB comprises a first dielectric substrate, wherein a first circle center line is arranged on the first dielectric substrate, the first circle center line is connected with an input port through a microstrip main transmission line, and an open-circuit branch is arranged on the microstrip main transmission line connected with the input port through the first circle center line; four concentric circle microstrip bending arc arms are arranged on the same side of the first circle center line, the circle centers of the four concentric circle microstrip bending arc arms are arranged on the first circle center line, two ends of each concentric circle microstrip bending arc arm are respectively connected with an output port through microstrip lines, and the first circle center line is led out in the direction opposite to the input port to be connected with an output port through microstrip lines; the rotary slip sheet comprises a second medium substrate, a second circle center line is arranged on the second medium substrate, four concentric circle micro-strip arc arms are arranged on the same side of the second circle center line, the circle centers of the four concentric circle micro-strip arc arms are arranged on the second circle center line, and the second circle center line is communicated with the four micro-strip arc arms sequentially through the micro-strip lines; the four concentric circle micro-strip bending arc arms correspond to the four concentric circle micro-strip arc arms one by one in position and are consistent in radius.

2. The high-frequency slow-wave-to-nine phase shifter with filter characteristics as claimed in claim 1, wherein: the radius ratio of the four concentric circle micro-strip bending arc arms from inside to outside is 1: 2: 3: 4.

3. the high-frequency slow-wave-to-nine phase shifter with filter characteristics as claimed in claim 1, wherein: coating green oil on the one-to-nine high-frequency PCB and the rotary sliding vane; and the one-to-nine high-frequency PCB is fixed with a base plate and then feeds power to the rotary slide sheet in a green oil isolation signal coupling mode.

4. The high-frequency slow-wave-to-nine phase shifter with filter characteristics as claimed in claim 1, wherein: the rotary sliding sheet can rotate according to a second circle center line, so that the phases of eight ports led out by four concentric circle microstrip bending arc arms on a one-to-nine high-frequency PCB are changed.

5. The high-frequency slow-wave-to-nine phase shifter with filter characteristics as claimed in claim 1, wherein: the first dielectric substrate is arranged at the input port and the nine output ports, and the back surface and the front surface of the substrate are communicated through the metallized through holes.