CN215579011U - Coaxial cavity resonator with circular ring on cover plate - Google Patents
Coaxial cavity resonator with circular ring on cover plate Download PDFInfo
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- CN215579011U CN215579011U CN202121829921.0U CN202121829921U CN215579011U CN 215579011 U CN215579011 U CN 215579011U CN 202121829921 U CN202121829921 U CN 202121829921U CN 215579011 U CN215579011 U CN 215579011U
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Abstract
The utility model relates to a coaxial cavity resonator with a ring on a cover plate, which comprises a resonator body, wherein the resonator body is of a hollow structure, the cover plate is arranged above the resonator body, the bottom of the resonator body is provided with a bottom step, the bottom step is positioned at the central shaft of the resonator body, the bottom step is provided with a resonance rod, the height of the resonance rod is lower than the depth of the resonator body, the resonance rod consists of a high-impedance cylindrical part and a low-impedance cylindrical part, the cylindrical part is arranged at the top of the cylindrical part, the cylindrical part and the low-impedance cylindrical part form a mushroom-shaped structure, the inner side surface of the cover plate is connected with one end of the resonance ring, the other end of the resonance ring extends towards the inner cavity of the resonator body, the disc part of the resonance rod is covered by the resonance rod, a unthreaded hole is formed in the middle shaft of the resonance rod, an adjusting screw is inserted into the cover plate, and one end of the adjusting screw penetrates through the cover plate and extends into the unthreaded hole. The utility model can effectively reduce the resonance frequency of the resonator and realize the miniaturization of the filter.
Description
Technical Field
The utility model relates to the field of microwave devices, in particular to a coaxial cavity resonator with a circular ring on a cover plate.
Background
The iterative development of the communication technology is very fast, and the miniaturization of the communication equipment is always a hotspot of research in the communication industry; of which miniaturization of the filter is the most challenging and significant. For example, the Massive MIMO technology of the current 5G network has considerable requirements on the size of an antenna filter; the high-power transmission device is also applied to aerospace filters, has extremely strict requirements on weight and size, and accordingly reduces the transmission cost and improves the transmission height. In the coaxial resonator, in order to reduce the frequency, the length of the resonator can be shortened by more than half by setting different impedance ratios to the resonator, and a coaxial stepped impedance resonator is introduced, that is, the inner conductor of the resonator is stepped.
In the filter in the prior art, when the depth of the cavity is small and the working frequency of the filter is low, a resonant disc with a large size needs to be loaded on the open end of a resonant rod in the filter, and the resonant disc has to be designed into a downward-turning disc structure similar to an umbrella shape under the condition that the volume of the cavity is limited; the structure easily causes the filter resonance rod to have heavy head and light foot and be unreliable in the aspect of mechanical mechanics; this problem is particularly evident in filters with frequencies below 600M and below, where particularly large discs need to be loaded on the resonance rod, the distance between the disc and the cover plate is also very close, the frequency variation is particularly sensitive, slight vibrations affect the variation of the microwave parameters and do not meet the performance requirements of the filter. Too large a diameter of the resonator plate also reduces the unloaded Q-factor of the resonator, affecting filter insertion loss.
In view of the above-mentioned drawbacks, the present designer has made active research and innovation to create a coaxial cavity resonator with a novel structure and a circular ring on the cover plate, so that the coaxial cavity resonator has more industrial utility value.
SUMMERY OF THE UTILITY MODEL
In order to solve the above technical problem, an object of the present invention is to provide a coaxial cavity resonator having a circular ring on a cover plate.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the utility model provides a coaxial chamber syntonizer that has ring on apron, includes the syntonizer body, the syntonizer body is hollow structure, the top of syntonizer body is provided with the apron, be provided with the bottom step on the bottom of syntonizer body, lie in the center pin department of syntonizer body on the step of bottom, be provided with the resonance pole on the step of bottom, the degree of depth that highly is less than the syntonizer body of resonance pole, the resonance pole comprises the cylinder portion of high impedance and the disc portion of low impedance, disc portion sets up the top at cylinder portion, and they both constitute mushroom column structure, the medial surface of apron links to each other with the one end of resonance ring, the other end of resonance ring extends towards the inner chamber of syntonizer body, and it will cover the disc portion of resonance pole, the unthreaded hole has been seted up to the axis department of resonance pole, it has adjusting screw to peg graft on the apron, one end of the adjusting screw penetrates through the cover plate and extends into the light hole.
Preferably, the coaxial cavity resonator with the ring on the cover plate is locked with the resonator body through a bolt, so that the inner cavity of the resonator body forms a shielding cavity.
Preferably, the coaxial cavity resonator with the annular cover plate is characterized in that a gap is formed between the inner wall of the resonant annular ring and the outer wall of the disc part, and the height of the resonant annular ring is flush with the lower end of the disc part.
Preferably, the coaxial cavity resonator with the circular ring on the cover plate is made of metal.
Preferably, the coaxial cavity resonator with the ring on the cover plate is integrally formed with the cover plate.
Preferably, the coaxial cavity resonator with the circular ring on the cover plate has a cavity height of less than 38 mm.
By the scheme, the utility model at least has the following advantages:
the resonance frequency of the resonator can be effectively reduced through the matching of the resonance rod and the resonance ring, and the miniaturization design of the filter is realized.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the utility model.
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 one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Examples
As shown in fig. 1, a coaxial cavity resonator with a ring on a cover plate, comprising a resonator body 1, wherein the resonator body 1 is a hollow structure, a cover plate 2 is arranged above the resonator body 1, a bottom step 6 is arranged at the bottom of the resonator body 1, the bottom step 6 is arranged at the central axis of the resonator body 1, a resonance rod 3 is arranged on the bottom step 6, the height of the resonance rod 3 is lower than the depth of the resonator body 1, the resonance rod 3 is composed of a high-impedance cylindrical part 8 and a low-impedance disc part 7, the disc part 7 is arranged at the top of the cylindrical part 8, both of which form a mushroom-shaped structure, the inner side surface of the cover plate 2 is connected with one end of the resonance ring 4, the other end of the resonance ring 4 extends towards the inner cavity of the resonator body 1, and covers the disc part 7 of the resonance rod 3, the center shaft of the resonance rod 3 is provided with a light hole 9, the cover plate 2 is inserted with an adjusting screw 5, and one end of the adjusting screw 5 penetrates through the cover plate 2 and extends into the light hole 9.
The shape of the cavity of the resonator body 1 of the present invention may be a circular structure or a rectangular structure, depending on the needs, which is a technique known to those skilled in the art.
The cover plate 2 is locked with the resonator body 1 through bolts, so that the inner cavity of the resonator body 1 forms a shielding cavity.
According to the utility model, the adjusting screw 5 is not in contact with the unthreaded hole, the unthreaded hole 9 is formed in the center of the resonant rod, and the unthreaded hole 9 is used for adjusting the stretching of the adjusting screw to perform micro frequency adjustment and is also used for allowing the screw to penetrate when the resonant rod is installed.
In the utility model, a distance is arranged between the inner wall of the resonance ring 4 and the outer wall of the disc part 7, the height of the resonance ring 4 is flush with the lower end of the disc part 7, the distance between the inner wall of the resonance ring 4 and the outer wall of the disc part 7 and the height of the resonance ring can influence the change of resonance frequency, the distance can effectively reduce the frequency of a resonator, the distance from the resonance disc to a cover plate can be properly increased, the sensitivity of the frequency can be weakened, and the distance is a technology known by a person skilled in the art, and no description is given here.
The resonance ring 4 is made of metal, generally made of aluminum alloy, and is easy to be processed into a whole with the cover plate, and the resonance ring 4 can also be made of copper, iron or other metal materials with different thermal expansion coefficients, and can be independently processed, electroplated and welded on the cover plate, so that the frequency temperature coefficient of the filter resonator can be further improved; from the effect of frequency modulation, the planar capacitor of the resonator is equivalently extended from the upper surface to the side edge of the resonator, the distribution of the electric field is dispersed, and the capacitance value is also increased.
The resonance ring 4 and the cover plate 2 are integrally processed and formed.
The cavity height of the resonator body 1 is smaller than 38mm, when the resonator is assembled at 400MHz, the cavity height is smaller than 38mm, and when the Q value of a single cavity is required to be larger than 4000, the resonant ring structure is very favorable for balancing the electrical property and the mechanical reliability.
The resonant ring is also useful for reducing frequencies when the resonator is of the uniform impedance type when the filter is operating in the L-band and above.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (6)
1. The utility model provides a coaxial chamber syntonizer that has ring on apron which characterized in that: including syntonizer body (1), syntonizer body (1) is hollow structure, the top of syntonizer body (1) is provided with apron (2), be provided with bottom step (6) on the bottom of syntonizer body (1), the center pin department that lies in syntonizer body (1) on bottom step (6), be provided with resonance bar (3) on bottom step (6), the degree of depth that highly is less than syntonizer body (1) of resonance bar (3), resonance bar (3) comprise cylinder portion (8) of high impedance and disc portion (7) of low impedance, disc portion (7) set up the top in cylinder portion (8), and they both constitute mushroom column structure, the medial surface of apron (2) links to each other with the one end of resonance ring (4), the other end of resonance ring (4) extends towards the inner chamber of syntonizer body (1), the disc part (7) covering the resonance rod (3) is arranged, a unthreaded hole (9) is formed in the middle shaft of the resonance rod (3), an adjusting screw (5) is inserted into the cover plate (2), and one end of the adjusting screw (5) penetrates through the cover plate (2) and extends into the unthreaded hole (9).
2. The coaxial cavity resonator with a circular ring on a cover plate of claim 1, wherein: the cover plate (2) is locked with the resonator body (1) through a bolt, so that a shielding cavity is formed in the inner cavity of the resonator body (1).
3. The coaxial cavity resonator with a circular ring on a cover plate of claim 1, wherein: an interval is arranged between the inner wall of the resonance ring (4) and the outer wall of the disc part (7), and the height of the resonance ring (4) is flush with the lower end of the disc part (7).
4. A coaxial cavity resonator with a circular ring on a cover plate according to claim 1 or 3, characterized in that: the resonance ring (4) is made of metal.
5. The coaxial cavity resonator with a circular ring on a cover plate of claim 4, wherein: the resonance ring (4) and the cover plate (2) are integrally processed and formed.
6. The coaxial cavity resonator with a circular ring on a cover plate of claim 1, wherein: the cavity height of the resonator body (1) is smaller than 38 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121829921.0U CN215579011U (en) | 2021-08-06 | 2021-08-06 | Coaxial cavity resonator with circular ring on cover plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121829921.0U CN215579011U (en) | 2021-08-06 | 2021-08-06 | Coaxial cavity resonator with circular ring on cover plate |
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| Publication Number | Publication Date |
|---|---|
| CN215579011U true CN215579011U (en) | 2022-01-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121829921.0U Active CN215579011U (en) | 2021-08-06 | 2021-08-06 | Coaxial cavity resonator with circular ring on cover plate |
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| CN (1) | CN215579011U (en) |
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2021
- 2021-08-06 CN CN202121829921.0U patent/CN215579011U/en active Active
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