CN106450636B

CN106450636B - 3db electric bridge with coupling monitoring function

Info

Publication number: CN106450636B
Application number: CN201611137537.8A
Authority: CN
Inventors: 王永彪; 董剑磊; 李阳能; 袁旭正
Original assignee: Guangdong Shenglu Telecommunication Tech Co Ltd
Current assignee: Chengdu Chuangxinda Microwave Electronic Co ltd; Guangdong Shenglu Communication Co ltd; Guangdong Shenglu Telecommunication Tech Co Ltd
Priority date: 2016-12-10
Filing date: 2016-12-10
Publication date: 2021-12-31
Anticipated expiration: 2036-12-10
Also published as: CN106450636A

Abstract

The invention discloses a 3db electric bridge with a coupling monitoring function, which is characterized by comprising an electric bridge cavity, an electric bridge cover plate, a strip-shaped coupling main line, a strip-shaped coupling auxiliary line and a positioning medium, wherein the electric bridge cavity is provided with two electric bridge input ports, two electric bridge output ports and 4 coupling ports, the strip-shaped coupling main line and the strip-shaped coupling auxiliary line are fixed in the electric bridge cavity through the positioning medium, the strip-shaped coupling main line is connected between the electric bridge input ports and the electric bridge output ports, the strip-shaped coupling main line is provided with a coupling section corresponding to the strip-shaped coupling auxiliary line, and two ends of the strip-shaped coupling auxiliary line are respectively connected with a coaxial connector. The invention has simple structure and convenient use and installation, and compared with the products of the same type, the invention not only has low passive cross modulation, good index, but also has low cost and more excellent performance.

Description

3db electric bridge with coupling monitoring function

Technical Field

The invention relates to the technical field of cellular mobile communication, in particular to a radio frequency passive device-3 db electric bridge.

Background

The 3db bridge, also called a same-frequency combiner, is a common passive device, and is commonly used for combining and splitting signals and changing the phase of the signals. With the increasing market of POI (multi-system combiner platform), the demand of 3db electric bridge is also increasing. In a POI, it is often necessary to connect a coupler B at the output port of a bridge a to monitor the standing wave of the signal, and the conventional solution is to connect the output port of the bridge to four couplers via cables, as shown in fig. 1. This solution is not only costly and space consuming, but also may result in too high passive intermodulation due to the cabling between the bridge and the coupler.

Disclosure of Invention

The invention aims to solve the defects of the prior art, and provides the 3db electric bridge with the coupling monitoring function, which has the advantages of simple structure, greatly reduced production cost, reduced occupied space, convenience in installation and debugging and lower guarantee of passive intermodulation.

The invention adopts the following technical scheme to realize the purpose: a3 db electric bridge with a coupling monitoring function is characterized by comprising an electric bridge cavity, an electric bridge cover plate, a strip-shaped coupling main line, a strip-shaped coupling auxiliary line and a positioning medium, wherein the electric bridge cavity is provided with two electric bridge input ports, two electric bridge output ports and 4 coupling ports, the strip-shaped coupling main line and the strip-shaped coupling auxiliary line are fixed in the electric bridge cavity through the positioning medium, the strip-shaped coupling main line is connected between the electric bridge input ports and the electric bridge output ports, the strip-shaped coupling main line is provided with a coupling section corresponding to the strip-shaped coupling auxiliary line, and two ends of the strip-shaped coupling auxiliary line are respectively connected with a coaxial connector to realize bidirectional coupling of the couplers.

As a further explanation of the above scheme, the strip-shaped coupling main line is composed of two L-shaped strip lines and an intermediate connection portion between the two L-shaped strip lines, wherein one L-shaped strip line satisfies 3db distribution of the bridge, the other L-shaped strip line is used as a coupling straight line of the coupler, and the intermediate connection portion matches the two strip lines with each other.

Furthermore, the positioning medium is a polytetrafluoroethylene positioning column.

Furthermore, the positioning medium comprises a first cylindrical medium, a second cylindrical medium and a third cylindrical medium, the first cylindrical medium comprises two cylinders with inner diameters distributed in the size along the axial direction, the two cylinders are of an integrated structure, a circular hole corresponding to the large cylinder is formed in the cavity of the bridge, and the small cylinder penetrates through the strip coupling line to realize the positioning and fixing of the coupling line;

the cylindrical medium II is a hollow cylinder, the diameter of the middle aperture of the cylindrical medium II is the same as that of the small cylinder of the cylindrical medium I, the cylindrical medium II is sleeved on the small cylinder, and the two media and the belt-shaped medium are coupled to form a composite unit;

and the cylindrical medium III is a hollow cylinder and is arranged between the strip main line and the strip auxiliary line of the bridge part to realize the adjustment of the insertion loss and the coupling of the bridge.

Furthermore, notches are respectively arranged at two ends of the ribbon coupling main wire and correspond to the contact pins of the coaxial connector, and the coupling wire and the contact pins of the coaxial connector can be quickly welded together during assembly.

The invention adopts the technical proposal to achieve the following beneficial effects:

the invention adopts two high index 3db electric bridges and 40db cavity couplers with the same strip line thickness, then the input end of the coupler is directly connected with the output end of the electric bridge through a section of matching strip line, and standing wave matching is realized by adjusting the length and the width of the matching strip line, thereby realizing the 3db electric bridge with the coupling monitoring function; compared with the traditional scheme, the passive cross modulation is low, the index is good, and the cost is one third of that of the traditional scheme.

Drawings

FIG. 1 is a schematic comparison of the conventional scheme mentioned in the patent of the present invention with the scheme of the present patent;

FIG. 2 is a schematic diagram of the main coupling line structure of a 3db electric bridge with a 40db coupling function according to the present invention;

FIG. 3 is a schematic diagram of the coupling sub-line structure of a 3db bridge with a 40db coupling function according to the present invention;

FIG. 4 is a schematic diagram showing the structure of a first cylindrical dielectric of a 3db bridge with a 40db coupling function according to the present invention;

FIG. 5 is a schematic diagram showing the structure of a second cylindrical dielectric of a 3db bridge with a 40db coupling function according to the present invention;

FIG. 6 is a schematic diagram showing the structure of a cylindrical dielectric element III of a 3db bridge with a 40db coupling function according to the present invention;

FIG. 7 is a schematic diagram of the cavity structure of the 3db bridge with 40db coupling function according to the present invention;

FIG. 8 is a schematic diagram of the cover plate structure of a 3db bridge with a 40db coupling function according to the present invention;

fig. 9 is an assembled view of a 3db bridge with a 40db coupling function as disclosed in the present patent.

Description of reference numerals: 1. the device comprises a bridge cavity 1-1, a bridge input port 1-2, a bridge output port 1-3, a coupling port 2, a cover plate 3, a ribbon coupling main line 4, a ribbon coupling auxiliary line 5, a positioning medium 5-1, a cylindrical medium I5-2, a cylindrical medium II 5-3, a cylindrical medium III 6 and a coaxial connector

Detailed Description

The technical solution is described in detail with reference to specific embodiments below.

As shown in fig. 2-8, the invention is a 3db electrical bridge with a coupling monitoring function, which comprises an electrical bridge cavity 1, an electrical bridge cover plate 2, a ribbon coupling main line 3, a ribbon coupling sub-line 4 and a positioning medium 5, wherein the electrical bridge cavity 1 is provided with two electrical bridge input ports 1-1, two electrical bridge output ports 1-2 and 4 coupling ports 1-3, the ribbon coupling main line and the ribbon coupling sub-line are fixed in the electrical bridge cavity through the positioning medium, the ribbon coupling main line is connected between the electrical bridge input port and the electrical bridge output port, the ribbon coupling main line is provided with a coupling section corresponding to the ribbon coupling sub-line, and two ends of the ribbon coupling sub-line are respectively connected with a coaxial connector 6, so as to realize bidirectional coupling of the couplers. The strip coupling main line is composed of two L-shaped section lines and an intermediate connecting part between the two L-shaped section lines, wherein one section of the L-shaped section line meets 3db distribution of an electric bridge, the other section of the L-shaped section line is used as a coupling straight line of the coupler, and the two section lines are matched with each other by the intermediate connecting part. In this embodiment, the positioning medium is a teflon positioning column.

Furthermore, the positioning media 5 are divided into three types, including a first cylindrical medium 5-1, a second cylindrical medium 5-2 and a third cylindrical medium 5-3, the first cylindrical medium includes two cylinders with inner diameters distributed in a large and small size along the axial direction, the two cylinders are of an integrated structure, a circular hole 2 corresponding to the large cylinder is arranged in the cavity of the bridge, and the small cylinder penetrates through the strip coupling line to realize the positioning and fixing of the coupling line; the cylindrical medium II is a hollow cylinder, the diameter of the middle aperture of the cylindrical medium II is the same as that of the small cylinder of the cylindrical medium I, the cylindrical medium II is sleeved on the small cylinder, and the two media and the belt-shaped medium are coupled to form a composite unit; and the cylindrical medium III is a hollow cylinder and is arranged between the strip main line and the strip auxiliary line of the bridge part to realize the adjustment of the insertion loss and the coupling of the bridge.

Furthermore, notches 7 are respectively arranged at two ends of the ribbon coupling main wire and correspond to the contact pins of the coaxial connector, so that the coupling wire and the contact pins of the coaxial connector can be quickly welded together during assembly.

The embodiments of this patent are further described below by way of an example of an 800-.

Fig. 2 is a schematic diagram of a ribbon coupling main wire structure of the bridge disclosed in the patent, and the thickness of the bridge is set to be 1.5mm in order to meet the processing precision and minimize the size of the bridge, and the material is brass. The port a is an input port of the electric bridge, the sections a-b meet the 3db power distribution, and two air strip lines are adopted to realize the bandwidth meeting the requirements of 800-. The sections b-c are matched sections, and the width and length of the sections are optimized through simulation software, so that the standing wave of the electric bridge is as small as possible. The c-d section is a 40db coupling section, and in order to meet the bandwidth of 800-2500MHz, two sections of strip lines are adopted to realize the coupling function. Two notches are made at the 1 and 4 ends to allow the coupling wires and the pins of the coaxial connector to be soldered together during assembly. On whole section coupling line, distributed 6 diameter for 2.1 mm's round hole, when the equipment, the polytetrafluoroethylene cylinder realizes location and fixed action through passing the aperture.

Fig. 3 is a schematic diagram of the structure of the ribbon coupling sub-wire of the bridge in the patent, and a small hole 8 with the diameter of 2.1mm is respectively arranged at the a end and the b end, and when the coaxial connector pin is assembled, the coaxial connector pin is welded with the coupling wire by penetrating through the small hole. The middle part of the coupling line is provided with a round hole with the diameter of 2.1mm, and when the coupling line is assembled, the polytetrafluoroethylene passes through the small hole to realize the positioning and fixing effects.

Fig. 7 is a schematic diagram of a cavity structure of the bridge in the patent, 12 medium fixing jacks are processed at the bottom of the cavity, and when the bridge is assembled, the coupling lines are fixed and limited by installing media in the jacks.

FIG. 9 is an assembly diagram of the bridge in the patent, when signals of ports a and b are input, c and d are output ports of the bridge, the output is 3 + -0.5 dB, e and f are forward coupling ports of a 40dB coupler, and the output is 43 + -1.5 dB. g. The h port is a reverse coupled port.

Compared with the prior art, the bridge and the coupler are integrated, 4 connectors and two cables are omitted, the production cost is greatly reduced, the occupied space is reduced, and the installation and debugging are convenient; the three-order passive intermodulation PIM3 of the measured sample is stable and less than-150 dBc, VSWR is less than 1.25, insertion loss is-3 +/-0.5 dB, power capacity meets 300W, and the requirements of POI on an electric bridge are met, so that the method can be widely applied to a multi-system combiner platform.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.

Claims

1. A3 db electric bridge with a coupling monitoring function is characterized by comprising an electric bridge cavity, an electric bridge cover plate, a strip-shaped coupling main line, a strip-shaped coupling auxiliary line and a positioning medium, wherein the electric bridge cavity is provided with two electric bridge input ports, two electric bridge output ports and 4 coupling ports; the strip-shaped coupling main line consists of two L-shaped strip lines and an intermediate connecting part between the two L-shaped strip lines, wherein one L-shaped strip line meets the 3db distribution of an electric bridge, the other L-shaped strip line is used as a coupling straight line of the coupler, and the two strip lines are matched with each other by the intermediate connecting part;

the strip coupling main line of the electric bridge comprises an a port serving as an input port of the electric bridge, an a-b section meeting 3db power distribution, a b-c section serving as a matching section and a c-d section serving as a 40db coupling section, wherein the a-b section and the c-d section are respectively realized by adopting two sections of air strip lines, and the width and the length of the b-c section are optimized by simulation software; round holes are distributed on the whole section of the coupling line, and when the coupling line is assembled, the positioning medium can realize the positioning and fixing effects by penetrating through the round holes.

2. The 3db electrical bridge with coupling monitoring function of claim 1, wherein the positioning medium is a teflon positioning post.

3. The 3db electrical bridge with the coupling monitoring function according to claim 1, wherein the positioning medium comprises a first cylindrical medium, a second cylindrical medium and a third cylindrical medium, the first cylindrical medium comprises two cylinders with inner diameters distributed in a large and small size along the axial direction, the two cylinders are of an integrated structure, a circular hole corresponding to the large cylinder is formed in a cavity of the electrical bridge, and the small cylinder penetrates through the strip-shaped coupling line to realize positioning and fixing of the coupling line;

4. The 3db electrical bridge with coupling monitoring function according to claim 1, wherein notches are provided at both ends of the strip-shaped coupling main line, respectively, to correspond to the pins of the coaxial connector.