阅读说明：本技术 一种新型5g频段超宽频四路合路器 (Novel 5G frequency channel ultra-wideband four-way combiner ) 是由 余胜敏 陈露 于 2021-09-06 设计创作，主要内容包括：本发明公开了一种新型5G频段超宽频四路合路器,包括腔体,所述腔体侧面设有连接器,腔体顶部设有盖板,所述腔体内部设有并联的低通滤波器、第一带通滤波器、第二带通滤波器和第三带通滤波器,并联的低通滤波器、第一带通滤波器、第二带通滤波器和第三带通滤波器与公共腔谐振腔相连。上述技术方案通过低通的电感与带通滤波器容性抽头的结构配合加宽耦合带宽,避免需要多个抽头结构,影响互调,采用CT结构,缩短容性交叉耦合尺寸、盖板交叉耦合形状使二次谐波远离通带,二次谐波在4000M以上,并且在低通滤波器并联电容介质支撑上面增加调试螺杆,微调低通滤波器的回波损耗。(The invention discloses a novel 5G frequency band ultra-wideband four-way combiner which comprises a cavity, wherein a connector is arranged on the side surface of the cavity, a cover plate is arranged at the top of the cavity, a low-pass filter, a first band-pass filter, a second band-pass filter and a third band-pass filter which are connected in parallel are arranged in the cavity, and the low-pass filter, the first band-pass filter, the second band-pass filter and the third band-pass filter which are connected in parallel are connected with a common cavity resonant cavity. According to the technical scheme, the low-pass inductor is matched with a capacitive tap structure of the band-pass filter to widen the coupling bandwidth, the problem that intermodulation is influenced by a plurality of tap structures is avoided, the CT structure is adopted, the capacitive cross coupling size is shortened, the cover plate cross coupling shape enables the second harmonic to be far away from a pass band, the second harmonic is more than 4000M, a debugging screw rod is additionally arranged on a parallel capacitor medium support of the low-pass filter, and the return loss of the low-pass filter is finely adjusted.)

1. The utility model provides a novel 5G frequency channel ultra wide band four ways combiner, a serial communication port, which comprises a cavity, the cavity side is equipped with connector (7), and the cavity top is equipped with the apron, cavity inside is equipped with parallelly connected low pass filter (1), first band pass filter (2), second band pass filter (3) and third band pass filter (4), and parallelly connected low pass filter (1), first band pass filter (2), second band pass filter (3) and third band pass filter (4) link to each other with public chamber resonant cavity (5).

2. The novel 5G frequency band ultra-wideband four-way combiner according to claim 1, wherein the low-pass filter (1) comprises twelve-stage impedance lines, the high impedance line is an equivalent inductor, the low impedance line is an equivalent capacitor, the high impedance line and the low impedance line are alternately distributed from the first-stage inductor (8), and the low impedance line is supported by polytetrafluoroethylene and fixed on the cavity.

3. The novel 5G frequency band ultra-wideband four-way combiner according to claim 1, wherein the first band-pass filter (2) comprises a first band-pass filter 1 st resonator (2.1), a first band-pass filter 2 nd resonator (2.2), a first band-pass filter 3 rd resonator (2.3), a first band-pass filter 4 th resonator (2.4), a first band-pass filter 5 th resonator (2.5), a first band-pass filter 6 th resonator (2.6), a first band-pass filter 7 th resonator (2.7), a first band-pass filter 8 th resonator (2.8), a first band-pass filter 9 th resonator (2.9), the first band-pass filter 1 st resonator (2.1) is connected with a common cavity resonant cavity (5), the first band-pass filter 2 nd resonator (2.2), the first band-pass filter 3 rd resonator (2.3), the first band-pass filter 4 th resonator (2.4) and the first band-pass filter 6 th resonator (2.6), The 7 th resonator (2.7) of the first band-pass filter and the 8 th resonator (2.8) of the first band-pass filter respectively form two CT structures, and 2 transmission zeros are generated at the high end of the pass band of the filter.

4. The novel 5G frequency band ultra-wideband four-way combiner according to claim 1, wherein the second band-pass filter (3) comprises a second band-pass filter 1 st resonator (3.1), a second band-pass filter 2 nd resonator (3.2), a second band-pass filter 3 rd resonator (3.3), a second band-pass filter 4 th resonator (3.4), a second band-pass filter 5 th resonator (3.5), a second band-pass filter 6 th resonator (3.6), a second band-pass filter 7 th resonator (3.7), a second band-pass filter 8 th resonator (3.8), a second band-pass filter 9 th resonator (3.9), and a second band-pass filter 10 th resonator (3.10), the second band-pass filter 1 st resonator (3.1) is connected with the common cavity resonator (5), the second band-pass filter 2 nd resonator (3.2), the second band-pass filter 3.3) and the common cavity resonator (3.3), The 4 th resonator (3.4) and the 5 th resonator (3.5) of the second band-pass filter, the 6 th resonator (3.6) of the second band-pass filter, the 7 th resonator (3.7) of the second band-pass filter, the 8 th resonator (3.8) of the second band-pass filter, the 9 th resonator (3.9) of the second band-pass filter and the 10 th resonator (3.10) of the second band-pass filter respectively form three CT structures, and 3 transmission zeros are generated at the lower end of the pass band of the filter.

5. The novel 5G frequency band ultra-wideband four-way combiner according to claim 1, wherein the third band-pass filter (4) comprises a third band-pass filter 1 st resonator (4.1), a third band-pass filter 2 nd resonator (4.2), a third band-pass filter 3 rd resonator (4.3), a third band-pass filter 4 th resonator (4.4), a third band-pass filter 5 th resonator (4.5), a third band-pass filter 6 th resonator (4.5), and a third band-pass filter 7 th resonator (4.7), and the third band-pass filter 1 st resonator (4.1) is connected with the common cavity resonator (5).

6. The novel 5G band ultra-wideband four-way combiner as claimed in claim 1, wherein the common cavity resonator (5) is connected to the first-stage inductor (8), the first band-pass filter 1 st resonator (2.1), the second band-pass filter 1 st resonator (3.1), and the third band-pass filter 1 st resonator (4.1), respectively, the bandwidth 1710-1880M of the first band-pass filter 1 st resonator (2.1), the bandwidth 1920-2170M of the second band-pass filter 1 st resonator (3.1), the bandwidth 3300-3700M of the third band-pass filter 1 st resonator (4.2171), and the coupling bandwidth 1710-3700M required to be covered by the common cavity is 74%.

7. The novel 5G frequency band ultra-wideband four-way combiner according to claim 4, wherein a CT structure consisting of the 8 th resonator (3.8) of the second band-pass filter, the 9 th resonator (3.9) of the second band-pass filter and the 10 th resonator (3.10) of the second band-pass filter is located on a copper sheet, and a capacitive cross-coupling structure (3.11) is arranged between the 8 th resonator (3.8) of the second band-pass filter and the 10 th resonator (3.10) of the second band-pass filter.

8. The novel 5G frequency band ultra-wideband four-way combiner according to claim 7, wherein the copper sheet is bent into a U shape, the 8 th resonator (3.8) and the 10 th resonator (3.10) of the second band-pass filter are shortened, and the capacitive cross-coupling structure (3.11) is adjusted to ensure that the second harmonic is far away from more than 4000M.

9. The novel 5G frequency band ultra-wideband four-way combiner according to claim 2, wherein a debugging screw (6) is provided on the cover plate, and the debugging screw (6) corresponds to the low-pass filter equivalent capacitance.

Technical Field

The invention relates to the technical field of communication, in particular to a novel 5G frequency band ultra-wideband four-way combiner.

Background

With the rapid development of mobile communication and the limitation of frequency allocation, many base stations need multi-signal output and input, so that it is obviously insufficient for a single filter or duplexer, and thus the design of a combiner is a necessary trend and final result. When the base station signal is covered, in order to save cost, a multi-frequency combiner is needed for the use of multiple signals.

There is the data to show, in the design process of the combiner of same frequency, traditional divide and shut way implementation mode generally adopts and shares the hierarchical setting of chamber and realize the port bandwidth, and the ascending and descending signal of two systems combines respectively earlier, then gets the coupling by public resonant cavity further, because there is more resonant cavity, and the crosstalk is stronger to lead to the combiner cavity volume great, the cost is higher.

Chinese patent document CN202905929U discloses a "four-frequency combiner". The filter comprises a cavity and a cover plate arranged on the cavity, wherein a first filter, a second filter, a third filter and a fourth filter which are respectively used for filtering network signals of four different frequency bands are arranged in the cavity, a first joint, a second joint, a third joint and a fourth joint which are respectively used as input ends of the network signals of the four different frequency bands are arranged on one side of the cavity, a fifth joint which is used as a public output end after the network signals of the four different frequency bands are combined is arranged on the other side of the cavity, and the first joint, the second joint, the third joint and the fourth joint are correspondingly coupled with the first filter, the second filter, the third filter and the fourth filter through a first tap piece, a second tap piece, a third tap piece and a fourth tap piece respectively. The above technical solution lacks the low-pass inductor to match with the structure of the capacitive tap of the band-pass filter, and does not optimize the capacitive cross-coupling size to reduce the device volume.

Disclosure of Invention

The invention mainly solves the technical problems that the prior technical scheme lacks the structural matching of a low-pass inductor and a capacitive tap of a band-pass filter and does not optimize the capacitive cross coupling size so as to reduce the volume of the device, and provides a novel 5G frequency band ultra-wideband four-way combiner.

The technical problem of the invention is mainly solved by the following technical scheme: the novel resonant cavity comprises a cavity body, wherein a connector is arranged on the side face of the cavity body, a cover plate is arranged on the top of the cavity body, a low-pass filter, a first band-pass filter, a second band-pass filter and a third band-pass filter which are connected in parallel are arranged in the cavity body, and the low-pass filter, the first band-pass filter, the second band-pass filter and the third band-pass filter which are connected in parallel are connected with a common cavity resonant cavity. The low-pass filter is a low-pass filter with a passband of 380-960MHz, a stopband rejection of 80db @1710-4000MHz, a first band-pass filter with a passband of 1710-1880MHz, a stopband rejection of 80db @380-960MHz and 80db @1920-4000MHz, a second band-pass filter with a passband of 1920-2170MHz, a stopband rejection of 80db @380-1880MHz and 80db @3300-4000MHz, a third band-pass filter with a passband of 3300-3700MHz, and a stopband rejection of 80db @380-960MHz and 80db @1710-2170 MHz. Public port combiner scheme: the first low-pass stage is an inductor, the common cavity tap is capacitively coupled, and the common cavity frequency band covers 1710-. A debugging screw rod is additionally arranged on the low-pass filter parallel capacitor medium support, so that the return loss of the low-pass filter can be finely adjusted.

Preferably, the low-pass filter comprises twelve-level impedance lines, the high impedance line is an equivalent inductor, the low impedance line is an equivalent capacitor, and the high impedance line and the low impedance line are alternately distributed from the first-level inductor and are fixed on the cavity. The low-pass filter adopts a copper sheet with the thickness of 1mm in order to reduce the cost, and the low-impedance line is supported by polytetrafluoroethylene.

Preferably, the first band-pass filter comprises a first band-pass filter 1 st resonator, a first band-pass filter 2 nd resonator, a first band-pass filter 3 rd resonator, a first band-pass filter 4 th resonator, a first band-pass filter 5 th resonator, a first band-pass filter 6 th resonator, a first band-pass filter 7 th resonator, a first band-pass filter 8 th resonator and a first band-pass filter 9 th resonator, the first band-pass filter 1 st resonator is connected with the common cavity resonant cavity, the 2 nd resonator, the 3 rd resonator, the 4 th resonator, the 6 th resonator, the 7 th resonator and the 8 th resonator of the first band-pass filter respectively form two CT structures, and 2 transmission zeros are generated at the high end of the filter pass band. Generating 2 transmission zeros at the high end of the filter passband for increased rejection.

Preferably, the second band-pass filter includes a second band-pass filter 1 st resonator, a second band-pass filter 2 nd resonator, a second band-pass filter 3 rd resonator, a second band-pass filter 4 th resonator, a second band-pass filter 5 th resonator, a second band-pass filter 6 th resonator, a second band-pass filter 7 th resonator, a second band-pass filter 8 th resonator, a second band-pass filter 9 th resonator, and a second band-pass filter 10 th resonator, the second band-pass filter 1 st resonator is connected to the common cavity resonator, the second band-pass filter 2 nd resonator, the second band-pass filter 3 rd resonator, the second band-pass filter 4 th resonator and the second band-pass filter 5 th resonator, the second band-pass filter 6 th resonator, the second band-pass filter 7 th resonator and the second band-pass filter 8 th resonator, The 9 th resonator and the 10 th resonator of the second band-pass filter respectively form three CT structures, and 3 transmission zeros are generated at the low end of the filter passband. Generating 3 transmission zeros at the low end of the filter passband for increased rejection.

Preferably, the third band-pass filter (4) comprises a third band-pass filter 1 st resonator, a third band-pass filter 2 nd resonator, a third band-pass filter 3 rd resonator, a third band-pass filter 4 th resonator, a third band-pass filter 5 th resonator, a third band-pass filter 6 th resonator, and a third band-pass filter 7 th resonator, and the third band-pass filter 1 st resonator is connected with the common cavity resonant cavity. There is no transmission zero structure.

Preferably, the common cavity resonant cavity is respectively connected with the first-stage inductor, the first bandpass filter 1 st resonator, the second bandpass filter 1 st resonator and the third bandpass filter 1 st resonator, the first bandpass filter 1 st resonator bandwidth 1710-1880M, the second bandpass filter 1 st resonator bandwidth 1920-2170M and the third bandpass filter 1 st resonator bandwidth 3300-3700M, and the coupling bandwidth required to be covered by the common cavity is 1710-3700M to obtain the relative bandwidth of 74%.

Preferably, the second band-pass filter 8 th resonator, the second band-pass filter 9 th resonator and the second band-pass filter 10 th resonator form a CT structure and are located on the copper sheet, and a capacitive cross-coupling structure is arranged between the second band-pass filter 8 th resonator and the second band-pass filter 10 th resonator.

Preferably, the copper sheet is bent into a U shape, the 8 th resonator and the 10 th resonator of the second band-pass filter are shortened, and the capacitive cross-coupling structure is adjusted to ensure that the second harmonic wave is far away from more than 4000M. If the second harmonic is below 3700, additional suppression structures must be added to achieve isolation.

Preferably, the cover plate is provided with a debugging screw, and the debugging screw corresponds to the low-pass filter equivalent capacitor. A debugging screw rod is additionally arranged on the low-pass filter parallel capacitor medium support, so that the return loss of the low-pass filter can be finely adjusted.

The invention has the beneficial effects that: the inductance of low pass is matched with the structure of the capacitive tap of the band-pass filter to widen the coupling bandwidth, so that the influence of a plurality of tap structures on intermodulation is avoided, a CT structure is adopted, the capacitive cross coupling size is shortened, the cross coupling shape of a cover plate enables the second harmonic to be far away from a pass band, the second harmonic is more than 4000M, a debugging screw rod is additionally arranged on the support of the parallel capacitor medium of the low-pass filter, and the return loss of the low-pass filter is finely adjusted.

Drawings

Fig. 1 is a top view of the present invention.

Figure 2 is a side view of the present invention.

Fig. 3 is a diagram of a common chamber configuration of the present invention.

FIG. 4 is a CT structural view of the present invention.

In the figure 1 low-pass filter, 1.1 first stage inductance, 2 first band-pass filter, 2.1 first band-pass filter 1 resonator, 2.2 first band-pass filter 2 resonator, 2.3 first band-pass filter 3 resonator, 2.4 first band-pass filter 4 resonator, 2.5 first band-pass filter 5 resonator, 2.6 first band-pass filter 6 resonator, 2.7 first band-pass filter 7 resonator, 2.8 first band-pass filter 8 resonator, 2.9 first band-pass filter 9 resonator, 3 second band-pass filter, 3.1 second band-pass filter 1 resonator, 3.2 second band-pass filter 2 resonator, 3.3 second band-pass filter 3 resonator, 3.4 second band-pass filter 4 resonator, 3.5 second band-pass filter 5 resonator, 3.6 second band-pass filter 6 resonator, 3.7 second band-pass filter 7 resonator, the third band-pass filter comprises a 3.8 th resonator of the second band-pass filter, a 3.9 th resonator of the second band-pass filter, a 3.10 th resonator of the second band-pass filter, a 3.11 capacitive cross-coupling structure, a 4 third band-pass filter, a 4.1 st resonator of the third band-pass filter, a 4.2 nd resonator of the third band-pass filter, a 3 rd resonator of the 4.3 third band-pass filter, a 4.4 th resonator of the third band-pass filter, a 5 th resonator of the 4.5 third band-pass filter, a 6 th resonator of the 4.6 third band-pass filter, a 7 th resonator of the 4.7 third band-pass filter, a 5 common cavity resonant cavity, a 6 debugging screw rod and a 7 connector.

Detailed Description

The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.

Example (b): the novel 5G frequency band ultra-wideband four-way combiner of this embodiment is shown in fig. 1, and comprises a cavity, the cavity side is equipped with connector 7, and the cavity top is equipped with the apron, the cavity is inside to be equipped with parallelly connected low pass filter 1, first band pass filter 2, second band pass filter 3 and third band pass filter 4, and parallelly connected low pass filter 1, first band pass filter 2, second band pass filter 3 and third band pass filter 4 link to each other with public chamber resonant cavity 5. The low-pass filter is a low-pass filter with a passband of 380-960MHz, a stopband rejection of 80db @1710-4000MHz, a first band-pass filter with a passband of 1710-1880MHz, a stopband rejection of 80db @380-960MHz and 80db @1920-4000MHz, a second band-pass filter with a passband of 1920-2170MHz, a stopband rejection of 80db @380-1880MHz and 80db @3300-4000MHz, a third band-pass filter with a passband of 3300-3700MHz, and a stopband rejection of 80db @380-960MHz and 80db @1710-2170 MHz. Public port combiner scheme: the first low-pass stage is an inductor, the common cavity tap is capacitively coupled, and the common cavity frequency band covers 1710-. A debugging screw rod is additionally arranged on the low-pass filter parallel capacitor medium support, so that the return loss of the low-pass filter can be finely adjusted. As shown in fig. 2, a debugging screw 6 is arranged on the cover plate, and the debugging screw 6 corresponds to the low-pass filter equivalent capacitor. A debugging screw rod is additionally arranged on the low-pass filter parallel capacitor medium support, so that the return loss of the low-pass filter can be finely adjusted.

The low-pass filter 1 comprises twelve-level impedance lines, wherein the high impedance line is an equivalent inductor, the low impedance line is an equivalent capacitor, the high impedance line and the low impedance line are alternately distributed from the first-level inductor 8, and the low impedance line is supported by polytetrafluoroethylene and fixed on a cavity. In order to reduce cost, the low-pass filter adopts a copper sheet with the thickness of 1mm, the low-impedance line is supported by polytetrafluoroethylene, the impedance of the low-impedance line is debugged and finely adjusted, and the return loss of the filter is debugged.

The first band-pass filter 2 comprises a first band-pass filter 1 resonator 2.1, a first band-pass filter 2.2, a first band-pass filter 3 resonator 2.3, a first band-pass filter 4 resonator 2.4, a first band-pass filter 5 resonator 2.5, a first band-pass filter 6 resonator 2.6, a first band-pass filter 7 resonator 2.7, a first band-pass filter 8 resonator 2.8, a first band-pass filter 9 resonator 2.9, the first band-pass filter 1 resonator 2.1 is connected with the common cavity resonator 5, the first band-pass filter 2.2, first band-pass filter 3 resonator 2.3, first band-pass filter 4 resonator 2.4 and first band-pass filter 6 resonator 2.6, first band-pass filter 7 resonator 2.7, first band-pass filter 8 resonator 2.8 are respectively composed of two structures CT, 2 transmission zeros are generated at the high end of the filter passband, for increased inhibition.

The second band-pass filter 3 comprises a second band-pass filter 1 resonator 3.1, a second band-pass filter 2 resonator 3.2, a second band-pass filter 3 resonator 3.3, a second band-pass filter 4 resonator 3.4, a second band-pass filter 5 resonator 3.5, a second band-pass filter 6 resonator 3.6, a second band-pass filter 7 resonator 3.7, a second band-pass filter 8 resonator 3.8, a second band-pass filter 9 resonator 3.9, a second band-pass filter 10 resonator 3.10, a second band-pass filter 1 resonator 3.1 is connected with the common cavity resonator 5, a second band-pass filter 2 resonator 3.2, a second band-pass filter 3.3 resonator 3.3, a second band-pass filter 4 resonator 3.4, a second band-pass filter 5 resonator 3.5, a second band-pass filter 6 resonator 3.6, a second band-pass filter 7 resonator 3.7, a second band-pass filter 8 resonator 3.8, The 9 th resonator 3.9 of the second band-pass filter and the 10 th resonator 3.10 of the second band-pass filter respectively form three CT structures, and 3 transmission zeros are generated at the low end of the filter pass band and used for increasing the suppression.

The third band-pass filter 4 comprises a third band-pass filter 1 st resonator 4.1, a third band-pass filter 2 nd resonator 4.2, a third band-pass filter 3 rd resonator 4.3, a third band-pass filter 4 th resonator 4.4, a third band-pass filter 5 th resonator 4.5, a third band-pass filter 6 th resonator 4.5 and a third band-pass filter 7 th resonator 4.7, wherein the third band-pass filter 1 st resonator 4.1 is connected with the common cavity resonant cavity 5 and has no transmission zero structure.

As shown in FIG. 3, the common cavity resonator 5 is connected to the first-stage inductor 8, the first bandpass filter 1 st resonator 2.1, the second bandpass filter 1 st resonator 3.1, and the third bandpass filter 1 st resonator 4.1, respectively, the first bandpass filter 1 st resonator 2.1 bandwidth 1710-1880M, the second bandpass filter 1 st resonator 3.1 bandwidth 1920-2170M, and the third bandpass filter 1 st resonator 4.1 bandwidth 3300-3700M, and the coupling bandwidth 1710-3700M required to be covered by the common cavity obtains the relative bandwidth of 74%.

As shown in fig. 4, the CT structure composed of the 8 th resonator 3.8, the 9 th resonator 3.9, and the 10 th resonator 3.10 of the second band-pass filter is located on the copper sheet, and a capacitive cross-coupling structure 3.11 is provided between the 8 th resonator 3.8 and the 10 th resonator 3.10 of the second band-pass filter. The copper sheet is bent into a U shape, the 8 th resonator 3.8 of the second band-pass filter and the 10 th resonator 3.10 of the second band-pass filter are shortened, and the capacitive cross-coupling structure 3.11 is adjusted to ensure that the second harmonic wave is far away from more than 4000M. If the second harmonic is below 3700, additional suppression structures must be added to achieve isolation.

The common cavity structure in fig. 3 can realize 1710-3700M bandwidth, and the low-pass inductor and the structure of the capacitive tap of the band-pass filter cooperate to widen the coupling bandwidth, thereby avoiding the need of a plurality of tap structures and affecting intermodulation; in the CT structure of fig. 4, the capacitive cross-coupling size is shortened, and the cover plate cross-coupling shape makes the second harmonic far away from the pass band, and the second harmonic is more than 4000M.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the terms low-pass filter, first band-pass filter, second band-pass filter and third band-pass filter are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.