CN212485517U - Combiner for antenna - Google Patents

Abstract

The utility model provides a combiner for antenna, which comprises a metal cavity and a microstrip plate arranged in the metal cavity; the microstrip board is provided with a low-frequency port, a medium-frequency port, a high-frequency port, a first junction and a total junction, the low-frequency port is connected with the total junction, the medium-frequency port and the high-frequency port are respectively connected with the first junction, and the first junction is connected with the total junction. The utility model provides a combiner for antenna has advantages such as the insertion loss is little, light in weight, small, can integrate inside the antenna, not only is convenient for install still has advantages such as the finished product uniformity is good.

Description

Combiner for antenna

Technical Field

The utility model relates to an antenna technology field especially relates to a combiner for antenna.

Background

To meet the requirement of coexistence of different communication systems, the primary solution which is only a temporary solution and not a permanent solution is solved by simply increasing the number of antennas. With the iterative upgrade of communication, the increasingly scarce antenna feeder space and the worry of some people about electromagnetic wave radiation require operators to meet the increasingly violent communication requirements in the limited antenna feeder space, so that future transceiver devices must integrate multiple frequency bands and can meet various working frequency bands in different service ranges, and the combiner can integrate signals in different frequency bands and filter out interference among the signals, so that the combiner is an indispensable part of a multi-frequency system.

The basic unit of the combiner is a filter, and the waveguide filter has the characteristics of small insertion loss, high Q value, large bearing power and the like, but is limited by the structure due to large volume and is not suitable for multi-frequency combination in the antenna; the microstrip filter is widely applied to an antenna internal system due to small volume and easy processing.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a combiner for antenna, it has advantages such as light in weight, miniaturization, convenient production.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

a combiner for an antenna comprises a metal cavity and a microstrip plate arranged in the metal cavity; the microstrip board is provided with a low-frequency port, a medium-frequency port, a high-frequency port, a first junction and a total junction, the low-frequency port is connected with the total junction, the medium-frequency port and the high-frequency port are respectively connected with the first junction, and the first junction is connected with the total junction.

As the utility model provides a preferred embodiment of combiner for antenna still include first T shape knot and second T shape knot, intermediate frequency port, high frequency port and the first intersection that closes are connected respectively to the three-terminal of first T shape knot, first intersection, low frequency port and the intersection that closes are connected respectively to the three-terminal of second T shape knot.

As the utility model provides a preferred implementation mode of combiner for antenna, first T shape knot and second T shape knot are asymmetric structure.

As the present invention provides a preferred implementation of the combiner for antenna, further comprising a first cross junction and a second cross junction, wherein the first cross junction is composed of two open-circuit SIR resonators, and the second cross junction is composed of one open-circuit SIR resonator and one short-circuit SIR resonator.

As the utility model provides a preferred implementation mode of combiner for antenna, first cross knot and second cross knot are asymmetric structure.

As the utility model provides a preferred implementation mode of combiner for antenna still include two short circuit branches, all on the first road junction that closes to the route of always closing the road junction.

As the utility model provides a preferred implementation mode of combiner for antenna, be equipped with 2 branch knots of opening a way on the route of intermediate frequency port to the first road junction that closes.

As the utility model provides a preferred implementation mode of combiner for antenna, be equipped with 2 branch knots of opening a way on the route of high frequency port to the first road junction that closes.

As a preferred embodiment of the combiner for antenna, the corner of bending of combiner all sets up the chamfer.

As the utility model provides a preferred embodiment of combiner for antenna, the metal cavity is airtight cavity.

The utility model discloses following beneficial effect has:

the utility model provides a combiner for antenna has advantages such as the insertion loss is little, light in weight, small, can integrate inside the antenna, not only is convenient for install still has advantages such as the finished product uniformity is good.

The utility model discloses still adopt the SIR ladder impedance syntonizer of different length, realized the route and the stop band of three different passageway to through T shape knot and cross knot, further reduced the size of microstrip board.

Drawings

Fig. 1 is an electrical performance principle topological diagram of a combiner for an antenna according to the present invention;

fig. 2 is a schematic diagram of a front structure of a combiner for antenna according to the present invention;

fig. 3 is a perspective view of a metal cavity structure of the combiner for antenna of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying 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 efforts shall belong to the protection scope of the present invention.

Referring to fig. 1-3, the present embodiment provides a combiner for an antenna, which includes a metal cavity 2 and a microstrip plate 1 disposed in the metal cavity 2, wherein the dielectric constant of the microstrip plate 1 is between 2.2 and 3.3, but is not limited thereto; four signal ports are arranged on the microstrip board 1, namely a low-frequency port 11, a medium-frequency port 12, a high-frequency port 13, a first junction 15 and a junction 14. The microstrip board 1 is divided into two parts a and b to realize the electrical performance of the three-frequency combiner, as shown in fig. 2, the left side of the dotted line is a, and the rest part is b. The part a comprises two basic filtering units, the intermediate frequency port 12 is connected to the first junction 15 to form a low-pass filter, the high frequency port 13 is connected to the first junction 15 to form a high-pass filter, and preferably, two paths of signals are combined through a first T-shaped junction 31; the part b comprises two filtering units, the first junction 15 is connected to the junction 14 to form a dual-passband filter, the low-frequency signal port is connected to the junction 14 to form a low-pass filter, and the two signals are combined through a second T-shaped junction 32.

The low-frequency signal is input from the low-frequency port 11 and output from the summation intersection 14, and the medium-high frequency signal is filtered, and the path is equivalent to a low-pass filter; the intermediate frequency signal is input from the intermediate frequency port 12 and output from the summation port 14, and the low and high frequency signals are filtered, and the path is equivalent to a band-pass filter; the high frequency signal is input from the high frequency port 13 and output from the summation port 14, and the low and intermediate frequency signals are filtered out, and the path is equivalent to a high pass filter.

In some embodiments, the frequency of the low frequency signal is 351-366MHz, the frequency of the intermediate frequency signal is 806-866MHz, and the frequency of the high frequency signal is 1710-1880MHz, and typical applications of the combination of these three frequencies are in the public security field, such as PDT350M, PDT800M, LTE D2D communication, and the like.

With reference to fig. 1, in its entirety: the k1 path is a low-pass combiner, when a low-frequency signal is input at the low-frequency port 11, the signal is output from the output port of the total junction 14, and the intermediate-frequency port 1212 and the high-frequency port 1313 are in a suppressed state; the k2 path is a band-pass combiner, when the intermediate frequency port 12 inputs the intermediate frequency signal, the signal is output from the output port of the summation port 14, and the low frequency port 11 and the high frequency port 13 are in a suppression state; the k3 path is a high-pass filter, and when a high-frequency signal is input to the high-frequency port 13, the signal is output from the output port of the combiner, and the low-frequency port 11 and the intermediate-frequency port 12 are in a suppressed state.

Specifically, the two signals are combined by the first T-shaped junction 31, that is, three ends of the first T-shaped junction 31 are respectively connected to the intermediate frequency port 12, the high frequency port 13, and the first junction 15, and the two signals are combined by the second T-shaped junction 32, that is, three ends of the second T-shaped junction 32 are respectively connected to the first junction 15, the low frequency port 11, and the junction 14. Further, the first T-shaped junction 31 and the second T-shaped junction 32 are asymmetric structures.

The combiner for antennas further comprises a first cross 41 and a second cross 42, the first cross 41 being composed of two open SIR resonators (i.e. open branches 51), the second cross 42 being composed of one open SIR resonator (i.e. open branches 51) and one short SIR resonator (i.e. short branches 52). The passband and the stopband of the combiner are realized by the microstrip board 1 through a plurality of open-short circuit branches 52, and the branches can be used as carriers of elements, are applied to topology simulation of a complex structure of a circuit, can form input and output impedance matching while obtaining accurate balanced response, and can obtain lower return loss.

Further, the first and second cross junctions 41 and 42 are asymmetric structures.

In this embodiment, the microstrip connection and the corner have parasitic reactance due to the discontinuity of the microstrip, so that the microstrip at the connection needs to be cut and compensated to offset the reactance, and therefore, chamfers 53 are provided at the bent corners of the combiner.

In some embodiments, the combiner for antenna further includes two short-circuit branches 52, both on the path from the first junction 15 to the summation junction 14. In some embodiments, 2 open branches 51 are provided on the path from the if port 12 to the first junction 15; and 2 open-circuit branches 51 are arranged on the path from the high-frequency port 13 to the first junction 15.

As shown in fig. 3, the metal cavity 2 is a closed cavity and has an effect of shielding an interference signal. Further, the metal cavity 2 comprises a square cavity 21 and a cavity cover 22, four counter bores 23 are formed in the square cavity 21 and used for welding coaxial cables or connectors, and the microstrip board 1 is placed in the square cavity 21 and connected with a circuit board for feeding through the counter bores 23.

Through the structure design, the utility model discloses combiner for antenna has advantages such as the insertion loss is little, light in weight, small, can integrate inside the antenna, and the installation of not only being convenient for still has advantages such as the finished product uniformity is good.

The utility model discloses still adopt the SIR ladder impedance syntonizer of different length, realized the route and the stop band of three different passageway to through T shape knot and cross knot, further reduced the size of microstrip board 1.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is to be understood that the above-described embodiments are merely illustrative of some, but not restrictive, of the broad invention, and that the appended drawings illustrate preferred embodiments of the invention and do not limit the scope of the invention. This application is capable of embodiments in many different forms and is provided for the purpose of enabling a thorough understanding of the disclosure of the application. Although the present application has been described in detail with reference to the foregoing embodiments, it will be apparent to one skilled in the art that the present application may be practiced without modification or with equivalents of some of the features described in the foregoing embodiments. All equivalent structures made by using the contents of the specification and the drawings of the present application are directly or indirectly applied to other related technical fields and are within the protection scope of the present application.

Claims (10)

1. A combiner for an antenna is characterized by comprising a metal cavity and a microstrip plate arranged in the metal cavity; the microstrip board is provided with a low-frequency port, a medium-frequency port, a high-frequency port, a first junction and a total junction, the low-frequency port is connected with the total junction, the medium-frequency port and the high-frequency port are respectively connected with the first junction, and the first junction is connected with the total junction.

2. The combiner for antennas of claim 1, further comprising a first T-junction and a second T-junction, wherein three terminals of the first T-junction are connected to the if port, the hf port and the first junction, respectively, and three terminals of the second T-junction are connected to the first junction, the lf port and the junction, respectively.

3. The combiner of claim 2, wherein the first and second T-junctions are asymmetric structures.

4. The combiner for antennas of claim 1 or 2, further comprising a first cross junction and a second cross junction, the first cross junction consisting of two open-circuit SIR resonators, the second cross junction consisting of one open-circuit SIR resonator and one short-circuit SIR resonator.

5. The combiner for antennas of claim 4, wherein the first cross junction and the second cross junction are asymmetric structures.

6. The combiner of claim 5, further comprising two short circuit branches, both on the path from the first junction to the summation junction.

7. The combiner of claim 1, wherein 2 open branches are provided on a path from the if port to the first junction.

8. The combiner according to claim 1, wherein 2 open branches are provided on a path from the high frequency port to the first junction.

9. The combiner for antennas of claim 1, wherein each of the bent corners of the combiner is chamfered.

10. The combiner for antennas of claim 1, wherein the metal cavity is a closed cavity.

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