CN110828957B

CN110828957B - High-isolation 30dB coupling piece for 5G

Info

Publication number: CN110828957B
Application number: CN201911166882.8A
Authority: CN
Inventors: 陈建良
Original assignee: Suzhou City Prudential's Electronics Co ltd
Current assignee: Suzhou City Prudential's Electronics Co ltd
Priority date: 2019-11-25
Filing date: 2019-11-25
Publication date: 2020-10-27
Anticipated expiration: 2039-11-25
Also published as: CN110828957A

Abstract

The invention provides a high-isolation 30dB coupling sheet for 5G, which comprises a substrate, wherein back silver paste is printed on the back surface of the substrate, a main silver paste strip line and a silver paste coupling line are printed on the front surface of the substrate, the substrate is also provided with an input port, an output port, a coupling port and a terminating ground, one side, close to the coupling port, of the silver paste coupling line is provided with a 320 ohm resistor, one side, far away from the coupling port, of the silver paste coupling line is provided with a 260 ohm resistor and a 26 ohm resistor in parallel, the terminating ground is connected with the back silver paste, the 320 ohm resistor, the 260 ohm resistor and the 26 ohm resistor, and the 26 ohm resistor is connected with the terminating ground through a long ground wire; the silver paste coupling line extends a sawtooth-shaped bulge to the silver paste main strip line only at the position close to the coupling port; the method has the advantage of being capable of meeting the requirement of 5G application scenes on higher isolation.

Description

High-isolation 30dB coupling piece for 5G

Technical Field

The invention belongs to the technical field of coupling pieces, and particularly relates to a high-isolation 30dB coupling piece for 5G.

Background

At present, a large number of aluminum nitride ceramic integrated coupling sheets are commercialized, and certain contribution is made to miniaturization of the communication industry. The product is convenient to use, and has excellent reliability and stability which are accepted by the industry. But each different application scene has different specific index requirements. The isolation is an important index of the coupler, the isolation of the currently mainstream aluminum nitride ceramic integrated coupling piece is about-40 dB, the isolation can meet most scene requirements, but some 5G application scenes can provide higher requirements for the isolation, the existing 30dB aluminum nitride integrated coupling piece cannot meet the index requirements, and in order to solve the problems, a 5G high-isolation 30dB coupling piece is needed.

Disclosure of Invention

The invention aims to provide a high-isolation 30dB coupling sheet for 5G, and solves the problem that the existing 30dB aluminum nitride integrated coupling sheet cannot meet the requirements of 5G application scenes.

The invention provides the following technical scheme:

the utility model provides a 30dB coupling piece is kept apart with high to 5G, includes the base plate back printing back silver thick liquid, the base plate openly prints silver thick liquid main band line and silver thick liquid coupling line, still be equipped with input port, output port, coupling port and terminating ground on the base plate, silver thick liquid coupling line is close to coupling port one side is equipped with 320 ohm resistance, silver thick liquid coupling line keeps away from coupling port one side parallelly connected 260 ohm resistance and 26 ohm resistance that are equipped with, the terminating ground is connected the back silver thick liquid and 320 ohm resistance, 260 ohm resistance and 26 ohm resistance, just 26 ohm resistance with connect through long earth connection between the end ground; and the silver paste coupling line extends a saw-tooth-shaped bulge to the silver paste main strip line only at a position close to the coupling port.

Further, the substrate is an alumina ceramic substrate.

Further, the alumina ceramic substrate has the following dimensions: 4.5 × 5.0 × 0.635 mm.

Further, an input pad, an output pad and a coupling pad are respectively arranged at the input port, the output port and the coupling port.

Further, silver thick liquid owner takes the line silver thick liquid coupling line 320 ohm resistance 260 ohm resistance with all be provided with black protection film on the 26 ohm resistance.

Further, the back silver paste is used for being welded to a user device and used for fixing the coupling sheet and forming a grounding circuit.

The invention has the beneficial effects that:

according to the high-isolation 30dB coupling sheet for 5G, a 320-ohm resistor is added at the coupling port, two resistors are connected in parallel at the grounding port, the resistance values are 260 ohm and 26 ohm respectively, and the 26-ohm resistor prolongs the design of the grounding wire. The whole circuit changes the traditional design idea of connecting one resistor or two same resistors in parallel at the grounding end, and adjusts the impedance of the circuit through reasonable design, thereby achieving the purpose of improving the isolation degree of the product; meanwhile, the coupling main strip line adopts a zigzag design at the coupling position, the length of the coupling line is increased by the design, and the coupling fluctuation index is improved to a certain extent; the requirement of 5G application scenes on higher isolation is met.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural view of the present invention;

labeled as: 1. the circuit comprises a substrate, 2 parts of a back silver paste, 3 parts of a silver paste main strip line, 4 parts of a silver paste coupling line, 5 parts of an input port, 6 parts of an output port, 7 parts of a coupling port, 8 parts of a terminal ground, 9.320 ohm resistor, 10.260 ohm resistor, 11.26 ohm resistor, 12 parts of a long ground wire, 13 parts of a sawtooth-shaped bulge and 14 parts of a black protective film.

Detailed Description

As shown in fig. 1, a high-isolation 30dB coupling patch for 5G includes a substrate 1, the substrate 1 is an alumina ceramic substrate, and the size of the alumina ceramic substrate is: 4.5 x 5.0 x 0.635 mm; printing a back silver paste 2 on the back surface of the substrate 1, printing a silver paste main strip line 3 and a silver paste coupling line 4 on the front surface of the substrate 1, wherein the substrate 1 is also provided with an input port 5, an output port 6, a coupling port 7 and a terminal grounding 8, and the input port 5, the output port 6 and the coupling port 7 are respectively provided with an input pad, an output pad and a coupling pad; a 320 ohm resistor 9 is arranged on one side, close to the coupling port 7, of the silver paste coupling line 4, a 260 ohm resistor 10 and a 26 ohm resistor 11 are arranged on one side, far away from the coupling port 7, of the silver paste coupling line 4 in parallel, a terminating ground 8 is connected with the back silver paste 2 and the 320 ohm resistor 9, the 260 ohm resistor 10 and the 26 ohm resistor 11, and the 26 ohm resistor 11 is connected with the terminating ground 8 through a long grounding wire 12; the silver paste coupling line 4 extends a sawtooth-shaped bulge 13 to the silver paste main strip line only at the position close to the coupling port 7; black protective films 14 are arranged on the silver paste main strip line 3, the silver paste coupling line 4, the 320 ohm resistor 9, the 260 ohm resistor 10 and the 26 ohm resistor 11; the back silver paste 2 is used for soldering to the consumer device for fixing the coupling tab and forming a grounding circuit.

The 5G high-isolation 30dB coupling sheet is already applied to a 5G communication base station, and the excellent coupling fluctuation characteristic is greatly accepted in the scene base station. The perfect integration of the circulator and the 5G circulator provides possibility for further miniaturization of the 5G base station, and the further miniaturization of the 5G base station provides a new direction, so that the 5G base station has wider application in the future.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The high-isolation 30dB coupling sheet for 5G comprises a substrate and is characterized in that a back silver paste is printed on the back of the substrate, a silver paste main strip line and a silver paste coupling line are printed on the front of the substrate, an input port, an output port, a coupling port and a terminating ground are further arranged on the substrate, 320 ohm resistors are arranged on one sides, close to the coupling port, of the silver paste coupling lines, 260 ohm resistors and 26 ohm resistors are arranged on one sides, far away from the coupling port, of the silver paste coupling lines in parallel, the terminating ground is connected with the back silver paste and the 320 ohm resistors, the 260 ohm resistors and the 26 ohm resistors, and the 26 ohm resistors are connected with the terminating ground through long ground wires; and the silver paste coupling line extends a saw-tooth-shaped bulge to the silver paste main strip line only at a position close to the coupling port.

2. The 5G high-isolation 30dB coupling piece as claimed in claim 1, wherein the substrate is an alumina ceramic substrate.

3. The 5G high-isolation 30dB coupling piece according to claim 2, wherein the alumina ceramic substrate has the following dimensions: 4.5 × 5.0 × 0.635 mm.

4. The 5G high-isolation 30dB coupling piece according to claim 1, wherein an input pad, an output pad and a coupling pad are respectively arranged at the input port, the output port and the coupling port.

5. The 5G high-isolation 30dB coupling piece according to claim 1, wherein black protective films are arranged on the silver paste main strip line, the silver paste coupling line, the 320 ohm resistor, the 260 ohm resistor and the 26 ohm resistor.

6. The 5G high-isolation 30dB coupling piece according to claim 1, wherein the back silver paste is used for welding to a user device, fixing the coupling piece and forming a grounding circuit.