Broadband combiner common tap structure and combiner

Abstract

The utility model relates to the technical field of communication equipment, in particular to a common tap structure of a broadband combiner. The device comprises a base, a cover plate, a connector and a screw rod for fixing, the base is used for providing a supporting structure for installation for the whole public tap structure; the cover plate and the base are assembled and locked by a plurality of screw rods, and the internal public tap structure is closed to form a relatively sealed structure; a boss is reserved on the side face of the base and used for installing a connector. The connector is connected with external equipment and is used for outputting a combined signal; two public cavities are arranged in the base, and the two public cavities are combined to realize a combining function; one end of the connector is inserted into the base, one end inserted into the base is provided with a probe, and the two common cavities are connected through the probe; an insulator is arranged along the outer portion of the probe and used for isolating other elements in the base, and interference is avoided. According to the utility model, the taps of the band-pass filter are connected in series with the two-stage low pass and are connected to the common port, so that the time delay of the taps of the combiner is easier to match, and the mutual influence is small.

Description

TECHNICAL FIELD

[0001] The utility model relates to communication equipment technical field, in particular to a broadband combiner public tap structure. BACKGROUND

[0002] 5G communication is the communication technology that is being built comprehensively at present, frequency is high, and working frequency bandwidth is wide. With the proceeding of 5G mobile communication construction, each operator needs to solve the actual problems of common coverage of original 2G, 3G, 4G communication network and 5G communication network and solve the signal mutual interference between different frequency bands of each network, and the low intermodulation, high isolation, low loss and high performance multichannel combiner are key devices.

[0003] Most of the multichannel combiners on the market adopt band pass filters to combine, and the combination is carried out at the public port of the combiner, therefore the public port design scheme is the core design of the combiner. With the continuous upgrading of mobile communication systems, the combiner frequency band coverage is wide, and it is necessary to design a wideband public tap; and the tap part design requires simple structure and firm support, so that the low intermodulation technical index can be easily realized; the product is flexible and convenient to debug in production, and the producibility is relatively high.

[0004] In the prior art, 617-960MHz is a full pass band, and is realized by a low pass, but there are many demands in the market that 617-960MHz is often divided into 617-862MHz and 880-960MHz two band pass filters or 617-798M and 824-960M two band pass filters, and there is an isolation requirement, therefore two band pass filters must be used. If one full frequency band low pass filter is used and then two band pass filters are connected in series, then the size will be greatly increased, and the structure is also complex. INVENTION CONTENTS

[0005] The utility model aims at the problems in the background art, and proposes a broadband combiner public tap structure.

[0006] The technical scheme of the utility model relates to a broadband combiner public tap structure, which comprises a base, a cover plate, a connector and a screw rod for fixation.

[0007] The base is used for providing a support structure for installation for the whole public tap structure; the cover plate is assembled with the base and locked by a plurality of screw rods to close the internal public tap structure and form a relatively sealed structure; the side surface of the base is reserved with a boss for installing the connector; the connector is connected with an external device to output the combined signal.

[0008] Two common cavities are arranged in the base, and the combining function is realized by combination of the two common cavities; one end of the connector is inserted into the base, a probe is arranged at the end inserted into the base, and the two common cavities are connected through the probe; an insulator is arranged along the outside of the probe, and is used for isolating other elements in the base to avoid interference.

[0009] Preferably, a first filter is arranged in the first common cavity; and a second filter is arranged in the second common cavity.

[0010] Preferably, in the two-way combiner, the first filter is a coaxial cavity band-pass filter, and the frequency range is 617-960MHz; the tap of the first filter is made of a copper sheet with a thickness of 1mm and a width of 6mm; and the two stages from the tap to the common cavity are realized by low-pass, and the first stage of the low-pass is realized by high-impedance equivalent inductance.

[0011] Preferably, in the two-way combiner, the second filter is a coaxial structure cavity band-pass filter, and the frequency range is 1700-4200MHz; and the tap of the common cavity is realized by a capacitive structure in the form of a coupling disc or a probe.

[0012] Preferably, in the three-way combiner, the second filter takes a first resonant cavity as a common cavity, and is divided into two ways; one way is 1700-2700MHz, as the second filter; and the other way is 3300-4200MHz, as the third filter.

[0013] Preferably, in the four-way combiner, the first cavity of the second filter with a frequency of 1700-2700MHz is taken as a common cavity, and is divided into two ways; one way is 1700-2200MHz, as the second filter; one way is 2300-2700MHz, as the third filter; and the other way is 3300-4200MHz, as the fourth filter.

[0014] Preferably, in the five-way combiner, the first cavity of the second filter with a frequency of 1700-2700MHz is taken as a common cavity, and is divided into three ways; one way is 1710-1880MHz, as the second filter; one way is 1920-2200MHz, as the third filter; one way is 2300-2700MHz, as the fourth filter; and the other way is 3300-4200MHz, as the fifth filter.

[0015] A wideband combiner uses the common tap structure described above, realizes the combining function through a two-way combiner, and is based on the high-low pass combining principle.

[0016] Compared with the prior art, the wideband combiner has the following beneficial technical effects:

[0017] 1. Connecting a two-stage low-pass filter in series with the bandpass filter taps to a common port makes it easier to match the combiner tap delays and minimizes mutual interference.

[0018] 2. By bringing the resonators in the common cavity closer to the diversity resonators, the height of the coupling stiffeners can be reduced, the taps in the common cavity have less impact, and it is easier to strengthen them.

[0019] 3. Adjust the impedance of the connector's internal conductor to increase the overall strength of the tap;

[0020] 4. To reduce the impedance of the tap probe, adjust the probe length, control the capacitor frequency, and increase the tap strength. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a schematic diagram of the structure in the unfolded state of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the tap structure of the two-way combiner in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the three-way combiner tap structure in an embodiment of this utility model;

[0025] Figure 5 This is a schematic diagram of the four-way combiner tap structure in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the five-way combiner tap structure in an embodiment of this utility model.

[0027] Reference numerals: 1. Cover plate; 2. Screw; 3. Base; 4. Connector; 5. Probe; 6. Insulator; 7. First filter; 8. Second filter; 9. Third filter; 10. Fourth filter; 11. Fifth filter. Detailed Implementation

[0028] Example 1

[0029] like Figure 1 As shown, the broadband combiner common tap structure proposed in this utility model includes a base 3, a cover plate 1, a connector 4, and a screw 2 for fixing.

[0030] like Figure 2As shown, the base 3 is used to provide a support structure for the entire common tap structure for installation; the cover plate 1 is assembled with the base 3 and locked using a plurality of screws 2, which closes the internal common tap structure to form a relatively sealed structure; the side of the base 3 is reserved for mounting the connector 4; the connector 4 is connected with an external device for outputting the combined signal;

[0031] Two common cavities are provided in the base 3, and the combination of the two common cavities realizes the combining function; one end of the connector 4 is inserted into the base 3, and a probe 5 is provided at the end inserted into the base 3, and the two common cavities are connected through the probe 5; an insulator 6 is provided along the outside of the probe 5, which is used to isolate other elements in the base 3 to avoid interference.

[0032] A first filter 7 is provided in the first common cavity; a second filter 8 is provided in the second common cavity.

[0033] In this embodiment, the combiner tap can cover 2G, 3G, 4G, and 5G frequency bands. Among them, two-way combiner: filter 1: 617-960MHz, filter 2: 1700-4200MHz;

[0034] Three-way combiner: filter 1: 617-960MHz, filter 2: 1700-2700MHz, filter 3: 3300-4200MHz;

[0035] Four-way combiner: filter 1: 617-960MHz, filter 2: 1710-2200MHz, filter 3: 2300-2700MHz, filter 4: 3300-4200MHz;

[0036] Five-way combiner: filter 1: 617-960MHz, filter 2: 1710-1880MHz, filter 3: 1920-2200MHz, filter 4: 2300-2700MHz, filter 5: 3300-4200MHz.

[0037] The combiner tap is a high-low pass combining implementation principle, two-way combiner, first filter: 617-960MHz, which belongs to a coaxial cavity bandpass filter, and the tap is realized by a copper sheet with a thickness of 1mm and a width of 6mm, and two stages from the tap to the common port are realized by a low pass, and the first stage of the low pass is realized by a high-impedance equivalent inductance. Because the first filter covers a frequency of 617-960MHz, this common cavity can couple out a plurality of bandpass filters of 617-960MHz, and the number of combined frequency bands can be flexibly increased;

[0038] Second filter: 1700-4200MHz, realized by band-pass filter, commonly coaxial structure cavity band-pass filter, the tap of common cavity is realized by capacitive structure coupled by probe, this common cavity can couple out 1700-4200MHz multiple band-pass filter, flexible increase the number of combined frequency band. Because the frequency band of passband 2 reaches 1700-4200MHz, the filter bandwidth is 2500MHz, the relative bandwidth reaches 84.7%, the theoretical tap delay of the filter is about 0.22ns, this delay is too small, it is difficult to distinguish in simulation software, the delay is less than low noise, only the reflection delay of simulation tap cannot judge whether the tap strength meets the requirement. The new method is to establish a tap model in three-dimensional electromagnetic field simulation software, then export the snp file, import it in road simulation software and then optimize, take S parameter as the standard, judge the tap strength according to standing wave.

[0039] Two-way combiner, high-low pass combiner implementation principle, the first section of low-pass filter is inductor, and the first section of high-pass filter is capacitor. The frequency band of first filter 7 low-pass is 617-960MHz, and the first stage of low-pass is high impedance line equivalent to realize inductor. The frequency band of second filter 8 band-pass is 1700-4200MHz, and the tap is capacitive coupling structure in the form of coupling disc or probe, as shown in the model. Figure 3

[0040] Three-way combiner, based on two-way combiner, first filter 7 low-pass does not change, the tap coverage range of second filter 8 is 1700-4200MHz, taking the first resonant cavity of second filter 8 as common cavity, two ways are divided, one of which is 1700-2700MHz as second filter 8, and the other is 3300-4200MHz as third filter 9, as shown in the model. Figure 4

[0041] Four-way combiner, based on three-way combiner, first filter 7 low-pass does not change, taking the first cavity of filter with frequency of 1700-2700MHz as common cavity, two ways are divided, one of which is 1700-2200MHz as second filter 8, and the other is 2300-2700MHz as third filter 9, and the other is 3300-4200MHz as fourth filter 10, as shown in the model. Figure 5

[0042] ​​​The five-way combiner is based on the three-way combiner, the first filter 7 low pass is not changed, the first cavity of the filter with the frequency of 1700-2700MHz is the common cavity, three paths are divided, one of which is 1710-1880MHz as the second filter 8, one is 1920-2200MHz as the third filter 9, one is 2300-2700MHz as the fourth filter 10, and the other is 3300-4200MHz as the fifth filter 11, and the model is as shown in Figure 6

[0043] Compared with the prior art: the existing product 617-960MHz is a full-band pass, which is realized by a low pass, but there are many demands in the market that 617-960MHz is often divided into 617-862MHz and 880-960MHz two band pass filters, or 617-798MHz and 824-960MHz two band pass filters, and there is an isolation requirement, so two band pass filters must be used. If a full-band low pass filter is used and then two band pass filters are connected in series, the size will be greatly increased, and the structure is also complex. In the embodiment, a 2-order low pass is used instead; the size is small, only a space of a tap piece, and no additional cavity size is occupied. In addition, the existing combiner has 700MHz, 800MHz, 1800MHz, 2100MHz, 2700MHz, 3800MHz combiners, and the 3800MHz combiner is not so wide because the frequency band is only 3400-3800MHz, and in the embodiment, the port is coupled out through the thickened connector inner conductor, and the frequency band can be 3300-4200MHz, which is coupled out through the common cavity. Compared with the prior art, the low pass is reduced to 2-order, and the size is reduced.

[0044] Embodiment 2

[0045] A wideband combiner uses the common tap structure in embodiment 1, realizes the combiner function based on the high-low pass combiner principle through a two-way combiner.

[0046] In the embodiment, the combiner combiner port scheme is combined by two common cavities, one of which is designed to work in the frequency band of 617-960MHz, and the other is designed to work in the frequency band of 1700-4200MHz. The structure is simple, compact, reliable in support, convenient for production and assembly, meets the technical requirements of high power, high isolation and low intermodulation of the combiner, and fully meets the current market demand.

[0047] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to this, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the purpose of the utility model.​

Claims

1. A broadband combiner common tap structure, characterized by, It comprises a base (3), a cover plate (1), a connector (4) and a screw (2) for fixation; The base (3) is used to provide a support structure for installation of the whole common-tap structure; the cover plate (1) is assembled with the base (3) and locked by using several screws (2), so as to seal the internal common-tap structure and form a relatively sealed structure; the side of the base (3) is provided with a boss for mounting the connector (4); the connector (4) is connected with external equipment and used to output the combined signal. Two common cavities are arranged in the base (3) to realize the combining function by combination of the two common cavities; one end of the connector (4) is inserted into the base (3), and a probe (5) is arranged at the inserted end of the base (3) to connect the two common cavities; an insulator (6) is arranged along the outside of the probe (5) to isolate other elements in the base (3) and avoid interference.

2. A wideband combiner common tap structure according to claim 1, wherein, A first filter (7) is arranged in the first common cavity; a second filter (8) is arranged in the second common cavity.

3. A broadband combiner common tap structure according to claim 2, wherein, In the two-way combiner, the first filter (7) is a coaxial cavity band-pass filter with a frequency range of 617-960 MHz; the tap of the first filter (7) is made of a copper sheet with a thickness of 1 mm and a width of 6 mm; the tap to the common cavity is realized by two stages of low-pass, and the first stage of low-pass is realized by high-impedance equivalent inductance.

4. A broadband combiner common tap structure according to claim 2, wherein, In the two-way combiner, the second filter (8) is a coaxial structure cavity band-pass filter with a frequency range of 1700-4200 MHz; the tap of the common cavity is realized by a capacitive structure in the form of a coupling disc or a probe.

5. A broadband combiner common tap structure according to claim 4, wherein, In the three-way combiner, the second filter (8) takes the first resonant cavity as the common cavity and divides into two paths; one path has a frequency of 1700-2700 MHz and serves as the second filter (8); the other path has a frequency of 3300-4200 MHz and serves as the third filter (9).

6. A broadband combiner common tap structure according to claim 5, wherein, In the four-way combiner, the first cavity of the second filter (8) with a frequency of 1700-2700 MHz serves as the common cavity and divides into two paths; one path has a frequency of 1700-2200 MHz and serves as the second filter (8); one path has a frequency of 2300-2700 MHz and serves as the third filter (9); the other path has a frequency of 3300-4200 MHz and serves as the fourth filter (10).

7. A broadband combiner common tap structure according to claim 6, wherein, In the five-way combiner, the first cavity of the second filter (8) with a frequency of 1700-2700 MHz serves as the common cavity and divides into three paths; one path has a frequency of 1710-1880 MHz and serves as the second filter (8); one path has a frequency of 1920-2200 MHz and serves as the third filter (9); one path has a frequency of 2300-2700 MHz and serves as the fourth filter (10); the other path has a frequency of 3300-4200 MHz and serves as the fifth filter (11).

8. A wideband combiner, characterized by The common-tap structure according to any one of claims 1-7 is used to realize the combining function based on the high-low pass combining principle through a two-way combiner.

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