CN210430052U - Combining structure for five-way combiner - Google Patents

Abstract

The utility model discloses a close way structure for five way combiners, close way unit, five input joints and an output joint including first way of closing, second, first way of closing the unit includes band elimination filter and first band pass filter, and second closes the unit and includes elliptic function low pass filter, second band pass filter, third band pass filter and fourth band pass filter, an input joint is connected to first band pass filter input, and all the other four input joints are connected respectively to the input of four wave filters in the second way of closing the unit, and the output of four wave filters in the second way of closing the unit is connected to band elimination filter's input, and the output joint is connected to band elimination filter and first band pass filter's output. The utility model discloses a two combinations of way unit have simplified the structure of whole combiner, have dwindled the volume simultaneously, have reduced manufacturing cost.

Description

Combining structure for five-way combiner

Technical Field

The utility model relates to a combiner technical field, in particular to a combiner structure for five way combiners.

Background

The combiner is generally used at a transmitting end, and is used for combining two or more paths of radio frequency signals transmitted from different transmitters into one path of radio frequency signals which are sent to a radio frequency device for antenna transmission, and meanwhile, mutual influence among signals of various ports is avoided. At present, the types of combiners are more, but some problems exist.

As published (bulletin) No.: CN 205828612U's utility model discloses a five combiners of CGWDWCDMA TDE belongs to electronic information and mobile communication technical field. The utility model discloses an adopt the resonant cavity form, the cavity filter design that application wave filter fundamental principle will be applicable to CDMA, GSM, DCS, WCDMA and TDE network signal respectively is on same cavity.

The prior art has the disadvantages of complicated structure, large volume and high production cost.

SUMMERY OF THE UTILITY MODEL

Too complicated to prior art structure, the volume is great, the higher problem of manufacturing cost, the utility model provides a path structure for five way combiners can be approximately seen two sub-combiner structure combinations and form, simple structure, and small, low in production cost.

The technical scheme of the utility model is as follows.

The utility model provides a combiner structure for five way combiners, includes first combiner unit, second combiner unit, five input joints and an output joint, and first combiner unit includes band elimination filter and first band pass filter, and second combiner unit includes elliptic function low pass filter, second band pass filter, third band pass filter and fourth band pass filter, an input joint is connected to first band pass filter input, and all the other four input joints are connected respectively to the input of four filters in the second combiner unit, and the output of four filters in the second combiner unit is connected to band elimination filter's input, and the output of band elimination filter and first band pass filter connects. Through the combination of the two combiner units, the structure of the whole combiner is simplified, the size is reduced, and the production cost is reduced.

Preferably, the passband of the band-stop filter in the first combining unit is 50-2700MHz, the stopband is 3400-3800MHz, the band-stop filter is composed of 5 stages, the open ends of the branch lines of the band-stop filter are connected in series with a plurality of distributed capacitors, each open end of the branch line is fixed by a dielectric screw, the frequency band of the first band-pass filter is 3400-3800MHz, the first band-pass filter is a cosmetic line filter and is composed of 7 resonators, and no transmission zero point exists. Compared with the common band-stop filter, the structural stability of the band-stop filter is obviously improved, and the third-order intermodulation is obviously improved.

Preferably, the passband of the elliptic function low-pass filter in the second combining unit is 50-960MHz, the stopband is 1700-3800MHz, and there are 5 transmission zeros fixed to the cavity by the dielectric screws, the frequency bands of the second band-pass filter are 1710-1880MHz, the frequency bands of the third band-pass filter are 1920-2170MHz, and the frequency bands of the fourth band-pass filter are 2300-2700MHz, respectively.

Preferably, the second bandpass filter comprises 6 resonators, the first to third resonators are a CQ structure, the fourth to sixth resonators are a CQ structure, the two CQ structures each generate an inductive transmission zero point, and the zero point is located at 1920-. The second band pass filter belongs to DCS1800 and adds rejection to the UMTS2100 band.

Preferably, the third band-pass filter is composed of 9 resonators, the second to fifth resonators form a CQ structure, the second and fifth resonators are capacitively cross-coupled to generate two transmission zeros distributed at two sides of the passband of the third band-pass filter, the two zeros are located at 1800 + 1880M, and the second to fourth resonators form a CQ structure to generate a transmission zero, which is located at 2290M. The third band pass filter increases suppression of DCS1800, LTE2300 and LTE2600 bands.

Preferably, the fourth bandpass filter is composed of 10 resonators, the fourth to sixth resonators form a CQ structure, capacitive cross coupling is arranged, 1 transmission zero is generated, the zero is at 2180M, the fourth bandpass filter is a comb-shaped cavity filter, a filter tap adopts a low intermodulation structure, and capacitive disc coupling is adopted. The fourth bandpass filter includes LTE2300 and LTE2600 bands, and increases rejection of UMTS 2100.

Preferably, the low-intermodulation trap filter is arranged at a tap position of the input end of each filter, and the low-intermodulation trap filter is connected with the circuit board through an inductor. The low intermodulation trap is connected to a circuit board with lightning protection and direct current passing functions through an inductor, so that the whole combiner has the direct current passing function.

The beneficial effects of the utility model include: the two combining units are connected in series, so that the characteristic that the band-stop filter and the band-pass filter are easy to combine is skillfully utilized, the high-end frequency band (3400 + 3800M) is combined first, and the design difficulty is reduced; the band elimination filter has 50db of inhibition on the high-end frequency band (3400-; the band-elimination filter solves the difficulty that the common port is difficult to combine, the pass band of the band-elimination filter covers the pass band of the low-end 4-path combining unit, the band-elimination filter has 50db isolation to the high end (3400 plus 3800M), and the problem of mutual influence of taps is ingeniously solved.

Drawings

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

the figure includes: the filter comprises a cavity 1, a waterproof ring 4, a band elimination filter 5, a first band-pass filter 6, an elliptic function low-pass filter 7, a second band-pass filter 8, a third band-pass filter 9, a fourth band-pass filter 10 and a wave trap 11.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application. Furthermore, in the following detailed description, numerous specific details are set forth in order to provide a better understanding of the present invention. It will be understood by those skilled in the art that the present invention may be practiced without some of these specific details. In some instances, methods, means, elements and circuits that are well known to those skilled in the art have not been described in detail so as not to obscure the present invention.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood 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 one or more of that feature. In the description of the present embodiment, "a plurality" means two or more unless otherwise specified.

Example (b):

as shown in fig. 1, the combining structure for a five-way combiner is loaded on a cavity 1 and a cover plate, the cavity 1 includes a first combining unit and a second combining unit, a waterproof ring 4 is arranged around the cavity 1, the cavity 1 includes five input connectors and one output connector, and the first combining unit includes a band-stop filter 5 and a first band-pass filter 6. The passband of the band-stop filter 5 in the first combining unit is 50-2700MHz, the stopband is 3400 plus 3800MHz, the band-stop filter 5 consists of 5 stages, the open ends of the branch lines of the band-stop filter 5 are connected with a plurality of distributed capacitors in series, each open end of the branch line is fixed by a dielectric screw, the frequency band of the first band-pass filter 6 is 3400 plus 3800MHz, the first band-pass filter is a dressing line filter and consists of 7 resonators, and no transmission zero point exists. Compared with the common band elimination filter 5, the structural stability of the band elimination filter 5 is obviously improved, and the third-order intermodulation is obviously improved.

The second combining unit comprises an elliptic function low-pass filter 7, a second band-pass filter 8, a third band-pass filter 9 and a fourth band-pass filter 10, the input end of the first band-pass filter 6 is connected with one input connector, the input ends of the four filters in the second combining unit are respectively connected with the other four input connectors, the input end of the band-stop filter 5 is connected with the output ends of the four filters in the second combining unit, and the output ends of the band-stop filter 5 and the first band-pass filter 6 are connected with the output connector. Through the combination of the two combiner units, the structure of the whole combiner is simplified, the size is reduced, and the production cost is reduced.

The pass band of the elliptic function low-pass filter 7 in the second combining unit is 50-960MHz, the stop band is 1700-3800MHz, and 5 transmission zeros are fixed in the cavity 1 through dielectric screws.

The frequency band of the second band-pass filter 8 is 1710-1880MHz respectively, and the second band-pass filter is composed of 6 resonators, the first to third resonators are CQ structures, the fourth to sixth resonators are CQ structures, two CQ structures respectively generate an inductive transmission zero point, and the zero point position is 1920-1950M. The second band-pass filter 8 belongs to DCS1800 and adds rejection to the UMTS2100 band.

The frequency band of the third band-pass filter 9 is 1920-2170MHz respectively, and is composed of 9 resonators, the second to fifth resonators form a CQ structure, the second and fifth resonators are capacitively cross-coupled to generate two transmission zeros distributed at two sides of the passband of the third band-pass filter 9, the two zeros are at 1800-1880M, the second to fourth resonators form a CQ structure to generate a transmission zero, and the transmission zero is at 2290M. The third band-pass filter 9 increases suppression of DCS1800, LTE2300 and LTE2600 bands.

The frequency band of the fourth band-pass filter 10 is 2300 + 2700MHz, and is composed of 10 resonators, the fourth to sixth resonators form a CQ structure, capacitive cross coupling is arranged, 1 transmission zero is generated, the zero position is 2180M, the fourth band-pass filter 10 is a comb-shaped cavity 1 filter, a filter tap adopts a low intermodulation structure, and capacitive disc coupling is adopted. The fourth bandpass filter 10 includes the LTE2300 and LTE2600 frequency bands and increases rejection of UMTS 2100.

Still be equipped with low intermodulation trapper 11 and circuit board in the cavity 1, low intermodulation trapper 11 sets up and takes a percentage the position at every wave filter input, and low intermodulation trapper 11 passes through inductance connection circuit board. The low intermodulation trap 11 is connected to a circuit board with lightning protection and direct current passing functions through an inductor, so that the whole combiner has the direct current passing function.

The embodiment belongs to an outdoor type, has the characteristics of water resistance, lightning protection and direct current passing, can realize intermodulation of 160dBc @2 x 43dBm, and skillfully utilizes the characteristic that the band-stop filter 5 and the band-pass filter are easy to be combined by connecting the two combining units in series, so that the high-end frequency band (3400 + 3800M) is combined first, and the design difficulty is reduced; the band-stop filter 5 has 50db of inhibition on the high-end frequency band (3400-; the band-stop filter 5 solves the difficulty of difficult combination of the common port, the passband of the band-stop filter 5 covers the passband of the low-end 4-path combination unit, the band-stop filter 5 has 50db isolation to the high end (3400 and 3800M), and the problem of mutual influence of taps is ingeniously solved.

Through the description of the above embodiments, those skilled in the art will understand that, for convenience and simplicity of description, only the division of the above functional modules is used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules to complete all or part of the above described functions.

Units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, may be located in one place, or may be distributed to a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (7)

1. The utility model provides a combiner structure for five way combiners, its characterized in that includes first combiner unit, second combiner unit, five input joint and an output joint, and first combiner unit includes band elimination filter and first band pass filter, and the second combiner unit includes elliptic function low pass filter, second band pass filter, third band pass filter and fourth band pass filter, an input joint is connected to first band pass filter input, and all the other four input joints are connected respectively to the input of four filters in the second combiner unit, and the output of four filters in the second combiner unit is connected to the input of band elimination filter, and output joint is connected to the output of band elimination filter and first band pass filter.

2. The combining structure of claim 1, wherein the band-stop filter in the first combining unit has a passband of 50-2700MHz, a stopband of 3400 + 3800MHz, the band-stop filter consists of 5 stages, the open ends of the branch lines of the band-stop filter are connected in series with a plurality of distributed capacitors, each open end of the branch line is fixed by a dielectric screw, the frequency band of the first bandpass filter is 3400 + 3800MHz, the first bandpass filter is a cosmetic line filter, and consists of 7 resonators without transmission zero.

3. The combining structure of claim 1, wherein the elliptic function low-pass filter in the second combining unit has a pass band of 50-960MHz, a stop band of 1700-3800MHz, 5 transmission zeros fixed to the cavity by dielectric screws, the second band-pass filter has a frequency band of 1710-1880MHz, the third band-pass filter has a frequency band of 1920-2170MHz, and the fourth band-pass filter has a frequency band of 2300-2700 MHz.

4. The combining structure of claim 1 or 3, wherein the second band pass filter comprises 6 resonators, the first to third resonators are CQ structures, the fourth to sixth resonators are CQ structures, each of the two CQ structures generates an inductive transmission zero point, and the zero point is located at 1920-1950M.

5. The combining structure of claim 1, wherein the third band-pass filter comprises 9 resonators, the second to fifth resonators form a CQ structure, the second and fifth resonators are capacitively cross-coupled to generate two transmission zeros distributed on both sides of the passband of the third band-pass filter, the two zeros are located at 1800 + 1880M, the second to fourth resonators form a CQ structure to generate a transmission zero, and the transmission zero is located at 2290M.

6. The combining structure of claim 1, wherein the fourth bandpass filter comprises 10 resonators, the fourth to sixth resonators form a CQ structure, capacitive cross coupling is provided, 1 transmission zero is generated, the zero is at 2180M, the fourth bandpass filter is a comb cavity filter, and the filter taps adopt a low intermodulation structure and capacitive disc coupling.

7. The combining structure of claim 1, further comprising a low intermodulation trap and a circuit board, wherein the low intermodulation trap is disposed at a tap position of an input end of each filter, and the low intermodulation trap is connected to the circuit board through an inductor.

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