CN217641736U

CN217641736U - 90-degree power divider

Info

Publication number: CN217641736U
Application number: CN202220711473.2U
Authority: CN
Inventors: 于沛洋; 刘俊清
Original assignee: CETC 43 Research Institute
Current assignee: CETC 43 Research Institute
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2022-10-21
Anticipated expiration: 2032-03-29

Abstract

The utility model discloses a 90-degree power divider in the field of power dividers, which comprises a ceramic body consisting of multilayer dielectric slabs, wherein the top surface and the bottom surface of the ceramic body are grounding metal layers, and the side surface and the bottom surface are printed with an input port, a coupling port, a straight port and an isolation port of the 90-degree power divider; the middle of the ceramic body is provided with two layers of dielectric plates, wherein bent metal conduction bands L1 and L2 are respectively printed on the two layers of dielectric plates, the input end of the metal conduction band L1 is connected with the input port, the output end of the metal conduction band L1 is connected with the through port, the input end of the metal conduction band L2 is connected with the coupling port, and the output end of the metal conduction band L2 is connected with the isolation port. The utility model discloses based on multilayer ceramic structure, realize the performance of traditional individual layer circuit with multilayer circuit, through walking the line with the stripline is crooked, effectively reduced the size of merit divider. In addition, the 90-degree power divider is small in size, light in weight, small in loss, low in cost, high in power capacity, suitable for batch production, capable of being processed into a patch form and convenient to integrate in a microwave system.

Description

90-degree power divider

Technical Field

The utility model relates to a ware field is divided to the merit, specifically is a ware is divided to 90 degrees merits.

Background

The 90-degree power divider is an important passive device in a microwave system circuit, and has the function of realizing orthogonal power distribution from one path of signal to two paths of signals or realizing power synthesis from two paths of orthogonal signals to one path of signal. An excellent 90-degree power divider should have low in-band loss, wide operating bandwidth, large power tolerance, good phase and amplitude balance between output signals, and high isolation between output signals, and also should have as small a volume as possible. The traditional 90-degree power divider is realized in a mode of adopting a microstrip transmission line or a strip line, belongs to a plane structure, occupies a large area, cannot meet the miniaturization requirement of a microwave system, and is difficult to integrate with the traditional 90-degree power divider. In order to meet the miniaturization requirement of the device, the existing method adopts a dielectric material with high dielectric constant, high quality factor and low loss to reduce the size of the resonator, thereby reducing the volume of the device, but the traditional process technology cannot effectively reduce the size area of the device.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a 90 degrees merit divides ware to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a90-degree power divider comprises a ceramic body formed by a plurality of dielectric plates, wherein the top surface and the bottom surface of the ceramic body are grounding metal layers, and the side surface and the bottom surface are printed with an input port, a coupling port, a through port and an isolation port of the 90-degree power divider; the middle of the ceramic body is provided with two layers of dielectric plates, and a first bent metal conduction band L1 and a second bent metal conduction band L2 are respectively printed on the two layers of dielectric plates, wherein the input end of the first metal conduction band L1 is connected with the input port, the output end of the first metal conduction band L1 is connected with the through port, the input end of the second metal conduction band L2 is connected with the coupling port, and the output end of the second metal conduction band L2 is connected with the isolation port.

In some embodiments, the first and second metal conduction bands L1 and L2 cross each other up and down and have central symmetry.

In some embodiments, port matching structures are disposed on one side of the input end and one side of the output end of each of the first metal conduction band L1 and the second metal conduction band L2.

In some embodiments, the dielectric sheet is an LTCC ceramic substrate.

In some embodiments, the input port, the coupling port, the through port and the isolation port are printed in a printing-missing manner.

Has the advantages that: the utility model discloses based on multilayer ceramic structure, realize the performance of traditional individual layer circuit with multilayer circuit, through walking the line with the stripline is crooked, effectively reduced the size of merit divider. In addition, the 90-degree power divider is small in size, light in weight, small in loss, low in cost, high in power capacity, suitable for batch production, capable of being processed into a patch form and convenient to integrate in a microwave system.

Drawings

Fig. 1 is a schematic structural view of a 90-degree power divider of the present invention;

fig. 2 is a schematic diagram of the layered structure of the 90-degree power divider of the present invention;

FIG. 3 shows a standing wave test curve of the port of the present invention

Figure 4 shows the isolation test curve of the present invention

FIG. 5 shows a test curve of amplitude balance

Fig. 6 is a phase balance test curve of the present invention.

In the figure: l1-a first metal conduction band; l2-a second metal conduction band; 1-port matching architecture; 2-an input port; 3-a pass-through port; 4-a coupled port; 5-isolating the port; 6-ground port.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-2, a 90-degree power divider comprises a ceramic body formed by stacking 19 dielectric plates, preferably LTCC ceramic substrates, and has excellent heat dissipation and high temperature resistance. The upper surface of the 1 st dielectric plate and the lower surface of the 19 th dielectric plate are both grounded metal layers, and the dielectric plates from the 2 nd layer to the 9 th layer and from the 12 th layer to the 18 th layer are dielectric layers without printed metal layers, and the gap between the center conductor of the strip line and the grounded metal layer is ensured. A first metal conduction band L1 is printed on the 10 th dielectric plate, a second metal conduction band L2 is printed on the 11 th dielectric plate, and the first metal conduction band L1 and the second metal conduction band L2 are both in bent shapes, so that the size of the 90-degree power divider can be reduced. The preferred snakelike line of walking arranges, can have certain line spacing, guarantees power capacity. Spiral winding can also be adopted, but the port extraction is not preferable because the interlayer transition is required to be added and the complexity is increased. It should be noted that the bent turning points of the first and second metal strip lines L1 and L2 are all in arc transition, so that abrupt change of line width is avoided, and the 90-degree power divider has higher power capacity.

The side face and the bottom face of the ceramic body are printed with an input port 2, a coupling port 4, a through port 3 and an isolation port 5 of the 90-degree power divider, the four ports are symmetrically arranged at opposite angles of the ceramic body, and the ports are inwards sunken to be arc-shaped. The input end of the first metal conduction band L1 is connected with the input port 2, the output end of the first metal conduction band L1 is connected with the through port 3, the input end of the second metal conduction band L2 is connected with the coupling port 4, the output end of the second metal conduction band L2 is connected with the isolation port 5, and the first metal conduction band L1 and the second metal conduction band L2 jointly form a circuit of the 90-degree power divider.

An input signal enters the power divider from the input port 2 and is transmitted to the through port 3 through the metal conduction band L1, meanwhile, a signal with half power is coupled to the metal conduction band of the coupling transmission line and is transmitted to the coupling port 4, meanwhile, the two paths of signals have a phase difference of 90 degrees, and then one path of signal is divided into two paths with the phase difference of 90 degrees.

The sides and bottom of the ceramic body are also printed with a plurality of ground ports 6. As a preferred embodiment, the input port 1, the coupling port 4, the through port 3, the isolation port 5 and the grounding port 6 are printed in a missing printing mode, a raw-thorn printing process during the preparation of the LTCC ceramic substrate can be synchronously completed, an electrode side printing process is omitted, and the product processing efficiency can be effectively improved.

The first metal conduction band L1 and the second metal conduction band L2 are arranged on different dielectric plates, and because the input port 2 and the through port 3 are arranged at diagonal positions, and the coupling port 4 and the isolation port 5 are arranged at another pair of diagonal positions, the two metal conduction lines are crossed up and down. In addition, the first and second metal wires L1 and L2 are in central symmetry, so that the 90-degree power divider has excellent amplitude and phase balance. The input port 2, the through port 3, the coupling port 4 and the isolation port 5 of the ceramic body are also symmetrically arranged and are used for realizing connection and matching with the first metal strip line L1 and the second metal strip line L2.

As a preferred embodiment, the port matching structures 1 are disposed on the input ends and one output ends of the first and second metal conduction bands L1 and L2, and by using the port matching structures 1, the port matching structures 1 may be rectangular or in other geometric shapes, and the standing-wave ratio of each port of the 90-degree power divider may be improved by adjusting the sizes of the matching metal conduction bands, so as to reduce the port reflection, ensure that the 90-degree power divider has lower insertion loss, and simultaneously, adjust the output phase difference, and improve the phase balance of the 90-degree power divider.

According to the 90-degree power divider, the length, width and height are 12mm multiplied by 7mm multiplied by 1.8mm, through processing tests, as shown in fig. 3-6, the port standing-wave ratio is smaller than 1.3 in a working frequency band of 1500 MHz-2500 MHz, the output isolation is larger than 20dB, the amplitude balance is better than +/-0.3 dB, the phase balance is better than 90 +/-2 degrees, the working bandwidth is larger than 1GHz, the power capacity is larger than 100W, and all indexes are kept excellent while the small size is realized. Meanwhile, the 90-degree power divider is light in weight, small in loss, low in cost, suitable for batch production, capable of being processed into a patch form, capable of being embedded in a substrate and very convenient to integrate in a microwave system.

Although the present description is described in terms of embodiments, not every embodiment includes only a single embodiment, and such description is for clarity only, and those skilled in the art should be able to integrate the description as a whole, and the embodiments can be appropriately combined to form other embodiments as will be understood by those skilled in the art.

Therefore, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application; all changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims

1. A90-degree power divider comprises a ceramic body formed by multilayer dielectric plates, and is characterized in that the top surface and the bottom surface of the ceramic body are grounding metal layers, and the side surface and the bottom surface are printed with an input port, a coupling port, a through port and an isolation port of the 90-degree power divider; the middle of the ceramic body is provided with two layers of dielectric plates, wherein bent first metal conduction bands (L1) and bent second metal conduction bands (L2) are respectively printed on the two layers of dielectric plates, the input end of each first metal conduction band (L1) is connected with the input port, the output end of each first metal conduction band (L1) is connected with the through port, the input end of each second metal conduction band (L2) is connected with the coupling port, and the output end of each second metal conduction band (L2) is connected with the isolation port.

2. The 90-degree power divider according to claim 1, wherein the first and second metal conduction bands (L1, L2) are vertically crossed and have central symmetry.

3. A 90 degree power divider according to claim 1 or 2, wherein the input end and one side of the output end of the first and second metal conduction bands (L1, L2) are provided with port matching structures.

4. The 90 degree power divider of claim 1, wherein the dielectric slab is an LTCC ceramic substrate.

5. The 90-degree power divider according to claim 4, wherein the input port, the coupling port, the through port and the isolation port are printed in a missing printing manner.