A high power capacitive coupled antenna cavity combiner

Abstract

The utility model relates to a kind of high-power capacitive coupling antenna cavity combiner, including cavity, front cover and back cover, cavity includes outer frame, multiple resonators and multiple straight line connecting ribs, each resonator includes independent support column and independent resonator, resonator is located on the lower edge of outer frame by corresponding support column, straight line connecting rib connects adjacent support column;One circular through-hole is provided on each resonator, circular through-hole penetrates resonator along front-back direction, back cover is equipped with several debugging screw rods, the inside of front cover is equipped with capacitive coupling fly rod assembly, capacitive coupling fly rod assembly includes transmission coupling sheet not conducting with front cover, the front of transmission coupling sheet is respectively opposite with two non-adjacent resonators.The utility model solves the electrical performance problem that capacitive coupling transmission sheet of high-power antenna cavity combiner withstands power overload spark, improves performance technical index.

Description

Technical Field

[0001] This utility model relates to the field of communication technology, and in particular to a high-power capacitive coupling antenna cavity combiner. Background Technology

[0002] With the development of mobile communication and the increasing demand for wider bandwidth due to the growing number of users, antenna combiners need to be lightweight, have wide signal coverage, high power capacity, and strong anti-interference capabilities. Existing antenna combiner designs install the near-end zero-suppression transmission chip in the lower half of the two resonators, and then utilize the coupling window between the resonators to achieve near-end zero suppression through capacitive or inductive parasitic coupling. The layout often adopts a comb-type structure. Power capacity is concentrated in the upper half of the resonators, making it difficult to guarantee the dimensional tolerances between the resonators, which affects the combiner's electrical performance during commissioning. This presents the following problems: 1) The capacitively coupled transmission plate structure mounted on the resonator has limited power capacity. Because the power capacity of the combiner is concentrated in the resonator, the poor heat dissipation of the transmission plate causes arcing due to power overload of the resonator and transmission plate, making it unable to withstand high power.

[0003] 2) The condition for achieving wideband near-end suppression zero is to reduce the distance between the transmission plate and the resonator. However, the closer the distance, the higher the size sensitivity, the higher the requirements for processing technology, the poorer the assembly consistency, the greater the difficulty of debugging, and the higher the cost.

[0004] 3) The coupling region of the existing antenna combiner capacitive flying rod coupled transmission plate is in the lower half of the resonator, its coupling energy is small, and the scalability of the coupling plate is limited.

[0005] 4) The structure of the antenna combiner with the flying rod mounting rib inside the cavity takes up a lot of cavity space, and this structure is not suitable when the overall size is limited.

[0006] 5) The capacitive parasitic coupling structure between resonator windows cannot meet the requirements for near-end suppression in the downlink band.

[0007] Chinese patent CN116190952A discloses an antenna combiner, including a capacitive flybar with two flybar pins, which are respectively inserted into mounting holes on two high-band lines. Here, the high-band lines themselves are very thin, and adding mounting holes makes processing inconvenient and easily leads to damage.

[0008] Therefore, a new antenna cavity combiner needs to be designed to avoid the above problems. Utility Model Content

[0009] The main purpose of this invention is to provide a high-power capacitive coupling antenna cavity combiner, which solves the electrical performance problem of arcing caused by power overload in the capacitive coupling transmission plate of the high-power antenna cavity combiner, and improves the performance technical indicators.

[0010] This utility model achieves the above-mentioned objective through the following technical solution: a high-power capacitively coupled antenna cavity combiner, comprising a cavity and a front cover plate and a rear cover plate fixed to both sides of the cavity. The cavity includes an integrally formed outer frame, multiple resonators, and multiple linear connecting ribs. The inner side of the front cover plate, the inner side of the rear cover plate, and the inner side of the outer frame form an inner cavity. Each resonator includes an independent support column and an independent resonator. The resonator is located on the lower side of the outer frame through a corresponding support column. The linear connecting ribs connect adjacent support columns. Each resonator has a circular through hole that penetrates the resonator in the front-to-back direction. The rear cover plate is provided with several adjustment screws. The inner side of the front cover plate is provided with a capacitive coupling fly rod assembly. The capacitive coupling fly rod assembly includes a transmission coupling piece that is not connected to the front cover plate. The front side of the transmission coupling piece is opposite to two non-adjacent resonators.

[0011] Specifically, the edge of the front cover is provided with a plurality of front fastening screws, and the front cover is fixed to the front side of the outer frame by the front fastening screws.

[0012] Specifically, the rear cover plate has multiple rear fastening screws on its edge, and the rear cover plate is fixed to the rear side of the outer frame by the rear fastening screws.

[0013] Specifically, each resonator has a circular through hole that penetrates the resonator in the front-to-back direction. The rear cover plate has several adjustment screws that correspond one-to-one with the circular through holes. The adjustment screws are inserted into their corresponding circular through holes from the rear.

[0014] Furthermore, the capacitive coupling fly rod assembly also includes two insulating screws, and the insulating gasket is fixed to the front cover plate by the two insulating screws, with the insulating screws inserted into their nearest circular through holes.

[0015] Furthermore, the transmission coupling plate has two coupling surfaces and a thin rod connecting the two coupling surfaces. Each coupling surface is fixed to the front cover plate by an insulating screw, and the front surfaces of the two coupling surfaces are respectively opposite to two non-adjacent resonators.

[0016] Furthermore, the capacitive coupling flybar assembly also includes two insulating pads sandwiched between the coupling face and the front cover.

[0017] The beneficial effects of this utility model's technical solution are: This invention solves the electrical performance problem of arcing caused by power overload in the capacitive coupling transmission plate of the high-power antenna cavity combiner by using a fly rod, thereby improving performance indicators; it also widens the dimensions between resonators, facilitating processing; it solves the heat dissipation problem caused by the fly rod generating power during combiner operation; and it further improves the first-pass yield rate of the combiner's electrical performance testing, reducing production costs. Attached Figure Description

[0018] Figure 1 This is an exploded view of the antenna cavity combiner in the embodiment. Figure 2 This is a partial schematic diagram of the antenna cavity combiner cavity near the capacitive coupling flybar assembly in an embodiment; Figure 3 for Figure 2 AA section view in the image.

[0019] The numbers in the image represent: 1-Cavity, 11-Outer frame, 12-Resonator, 121-Support column, 122-Resonator, 1221-Circular through hole, 13-Straight connecting rib; 2-Front cover plate, 21-Front fastening screw; 3-Rear cover plate, 31-Rear fastening screw, 32-Adjusting screw; 4-Capacitive coupling fly rod assembly, 41-Transmission coupling plate, 411-Coupled face, 412-Slim rod section, 42-Insulating screw, 43-Insulating gasket. Detailed Implementation

[0020] The present invention will be further described in detail below with reference to specific embodiments.

[0021] Example: like Figure 1 and Figure 2 As shown, this utility model discloses a high-power capacitive coupling antenna cavity combiner, comprising a cavity 1 and a front cover plate 2 and a rear cover plate 3 fixed to both sides of the cavity 1. The cavity 1 includes an integrally formed outer frame 11, multiple resonators 12, and multiple linear connecting ribs 13. The inner sides of the front cover plate 2, the rear cover plate 3, and the outer frame 11 form an inner cavity. Each resonator 12 includes an independent support column 121 and an independent resonator 122. The resonator 122 is located on the lower side of the outer frame 11 via a corresponding support column 121. The linear connecting ribs 13 connect adjacent support columns 121. Multiple front fastening screws 21 are provided on the edge of the front cover plate 2, and the front cover plate 2 is fixed to the front side of the outer frame 11 by the front fastening screws 21. Multiple rear fastening screws 31 are provided on the edge of the rear cover plate 3, and the rear cover plate 3 is fixed to the rear side of the outer frame 11 by the rear fastening screws 31.

[0022] The above describes the conventional structure of an antenna cavity combiner. The resonator 12 is essentially a series of capacitors and inductors connected in parallel, with adjacent resonators also connected in parallel. This capacitor is formed by the resonator 122 and the adjustment screw 31. The resonator 122 and the support post 121 act as a low-resistance wire, serving as an inductor, and also suspend the resonator 122 within the cavity space. Adjacent resonators 122 form another capacitor with air as the dielectric.

[0023] like Figure 2 and Figure 3 As shown, each resonator 122 is provided with a circular through hole 1221, which penetrates the resonator 122 in the front-to-back direction. The rear cover plate 3 is provided with a number of adjustment screws 31, which correspond one-to-one with the circular through holes 1221. The adjustment screws 31 are inserted into their corresponding circular through holes 1221 from the rear.

[0024] The adjusting screw 31 is a conductive screw threaded onto the rear cover plate 3. When it rotates, the length of its extension into the circular through hole 1221 can be adjusted, which will cause the inner surface of the circular through hole 1221 to face the outer circumferential surface of the adjusting screw 31, thereby changing its capacitance value.

[0025] like Figures 1 to 3 As shown, a capacitive coupling fly rod assembly 4 is provided on the inner side of the front cover plate 2. The capacitive coupling fly rod assembly 4 includes a transmission coupling plate 41, two insulating screws 42 and two insulating gaskets 43. The transmission coupling plate 41 has two coupling surfaces 411 and a thin rod portion 412 connecting the two coupling surfaces 411. Each coupling surface 411 is fixed to the front cover plate 2 by an insulating screw 42. The insulating gasket 43 is clamped between the coupling surface 411 and the front cover plate 2. The front surfaces of the two coupling surfaces 411 are respectively opposite to two non-adjacent resonators 122. The insulating screw 42 is inserted into the nearest circular through hole 1221.

[0026] Because both the insulating screw 42 and the insulating gasket 43 are non-conductive, the transmission coupling plate 41 and the front cover plate 2 are only physically connected, not conductive. The two insulating gaskets 43 not only separate the transmission coupling plate 41 from the front cover plate 2, but also ensure that the coupling surface 411 of the transmission coupling plate 41 faces the resonator 122. Each coupling surface 411 of the transmission coupling plate 41 and its opposite resonator 122 constitute another capacitor. The two coupling surfaces 411 are conductively connected through the thin rod portion 412. Therefore, the front cover plate 2, the transmission coupling plate 41, and the two resonators 122 form a large capacitor, generating a zero-suppression point on the left side of the passband, allowing alternating current to pass quickly between the two spaced resonators 122, meeting high power requirements. The surface of the transmission coupling plate 41 runs along the length of the inner cavity, preventing severe obstruction and facilitating heat dissipation. The thin rod portion 412 in the middle of the transmission coupling plate 41 saves material without affecting capacitor performance. The maximum diameter of the insulating screw 42 is obviously smaller than the diameter of the circular through hole 1221, and preferably the insulating screw 42 and the circular through hole 1221 are coaxial. Since the resonator 122 will inevitably have a circular through hole 1221, forming a space for insertion, the adjustment screw 32 enters from the rear, but generally does not occupy the entire axial length of the circular through hole 1221, while the insulating screw 42 enters from the front. The circular through hole 1221 can precisely avoid the position of the insulating screw 42. Only a space slightly larger than the thickness of the transmission coupling piece 41 is needed in front of the resonator 122, thus avoiding a significant increase in the front and rear thickness of the antenna cavity combiner. This invention solves the electrical performance problem of capacitive coupling transmission pieces in high-power antenna cavity combiners bearing power overload arcing through the transmission coupling piece 41, improving performance indicators; it widens the dimensions between the resonators 122, facilitating processing; it solves the heat dissipation problem after the fly rod heats up during combiner operation; and it improves the first-pass yield rate of the combiner's electrical performance testing, reducing production costs.

[0027] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A high-power capacitively coupled antenna cavity combiner, comprising a cavity and a front cover plate and a rear cover plate fixed to both sides of the cavity, the cavity comprising an integrally formed outer frame, multiple resonators and multiple linear connecting ribs, the inner side of the front cover plate, the inner side of the rear cover plate and the inner side of the outer frame forming an inner cavity, each resonator comprising an independent support column and an independent resonator, the resonator being seated on the lower side of the outer frame via a corresponding support column, the linear connecting ribs connecting adjacent support columns; characterized in that: The inner side of the front cover is provided with a capacitive coupling fly rod assembly. The capacitive coupling fly rod assembly includes a transmission coupling piece that is not connected to the front cover. The front side of the transmission coupling piece is opposite to two non-adjacent resonators.

2. The high-power capacitive coupling antenna cavity combiner according to claim 1, characterized in that: The front cover plate is provided with a plurality of front fastening screws on its edge, and the front cover plate is fixed to the front side of the outer frame by the front fastening screws.

3. The high-power capacitive coupling antenna cavity combiner according to claim 1, characterized in that: The rear cover plate is provided with a plurality of rear fastening screws on its edge, and the rear cover plate is fixed to the rear side of the outer frame by the rear fastening screws.

4. The high-power capacitively coupled antenna cavity combiner according to claim 1, characterized in that: Each resonator has a circular through hole that penetrates the resonator in the front-to-back direction. The rear cover plate has several adjustment screws that correspond one-to-one with the circular through holes. The adjustment screws are inserted into their corresponding circular through holes from the rear.

5. The high-power capacitive coupling antenna cavity combiner according to claim 4, characterized in that: The capacitive coupling flybar assembly also includes two insulating screws that pass through the nearest circular through hole.

6. The high-power capacitive coupling antenna cavity combiner according to claim 5, characterized in that: The transmission coupling plate has two coupling surfaces and a thin rod connecting the two coupling surfaces. Each coupling surface is fixed to the front cover plate by an insulating screw. The front surfaces of the two coupling surfaces are respectively opposite to two non-adjacent resonators.

7. The high-power capacitive coupling antenna cavity combiner according to claim 6, characterized in that: The capacitive coupling fly rod assembly also includes two insulating pads, which are fixed to the front cover plate by two insulating screws and are clamped between the coupling face and the front cover plate.

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