Downclocking resonator and filter

Abstract

The utility model discloses a frequency reduction resonator and a filter, and relates to the technical field of resonators, the frequency reduction resonator comprises a resonator and a tuning disc which are matched with each other, the top of the resonator is provided with a resonance disc, a resonance inner cavity is formed in the resonance disc, and a resonance inner ring is arranged in the resonance inner cavity; a tuning inner cavity is formed in the bottom of the tuning disc, and a tuning inner ring is arranged in the tuning inner cavity; the peripheral side wall of the tuning inner cavity and the tuning inner ring are used for being inserted into the inner side and the outer side of the tuning inner ring respectively. The purposes of capacitance increasing and frequency reducing are achieved by adjusting the distance between the sawtooth grooves formed between the resonators and the tuning disc, so that frequency control can be achieved based on adjustment control of the height of the resonance disc, and the effects of facilitating production and remarkably increasing the frequency tuning amount are achieved.

Description

Technical Field

[0001] This application relates to the field of resonator technology, and in particular to a frequency-reducing resonator and filter. Background Technology

[0002] A filter is a filtering circuit composed of capacitors, inductors, and resistors. A filter can effectively filter out specific frequencies or frequencies outside of a power supply line to obtain a power signal of a specific frequency, or eliminate a power signal of a specific frequency.

[0003] Chinese Patent Publication No. CN202839916U discloses a coaxial cavity filter. This coaxial cavity filter includes a cavity, a cover plate enclosing the cavity, and a resonator disposed within the cavity. The resonator includes a capacitor plate and a rod, with the capacitor plate disposed at one end of the rod. The coaxial cavity filter also includes a tuning screw, one end of which penetrates the cover plate and the capacitor plate sequentially and is inserted into the cavity, while the other end is fixed to the cover plate. This utility model relates to a coaxial cavity filter.

[0004] However, the resonator of this coaxial cavity filter increases the capacitance of the entire resonant cavity during its interaction with the tuning screw, thereby reducing the passband frequency of the resonant cavity. However, the installation of the tuning screw will also cause changes in its overall structure, leading to problems such as center of gravity adjustment and affecting the filtering effect of the filter. This makes production difficult and requires improvement. Utility Model Content

[0005] In view of this, the first objective of this application is to provide a frequency-reducing resonator that achieves both low manufacturing difficulty and a significantly increased frequency tuning range. The specific solution is as follows:

[0006] A frequency-reducing resonator includes a matched resonator and a tuning disk. The resonator has a tuning disk at its top and a resonant cavity formed within it. A resonant inner ring is disposed within the resonant cavity. The tuning disk has a tuning cavity at its bottom and a tuning inner ring is disposed within it. The outer peripheral sidewall of the tuning cavity and the tuning inner ring are respectively used to insert into the inner and outer sides of the tuning inner ring.

[0007] Preferably, the depth at which the outer peripheral sidewall of the tuning cavity and the inner tuning ring are inserted into the resonant cavity is adjustable.

[0008] Preferably, the resonator is provided with a column located at the bottom of the resonant disk, and the column coincides with the axis of the resonant disk.

[0009] The second objective of this invention is to provide a filter, including a frequency-reducing resonator as described above.

[0010] Preferably, the cavity includes a cavity, a mounting post is provided at the bottom of the cavity along the axis, the mounting post is used to connect and fix with a column; a top cover is provided at the top of the cavity, and the top of the tuning disk is connected and fixed to the top cover.

[0011] As can be seen from the above solutions, this application provides a frequency-reducing resonator and filter, which have the following beneficial effects:

[0012] 1. The capacitance can be adjusted by changing the size of the resonator and the resonant disk, thereby increasing the capacitance and reducing the frequency.

[0013] 2. By adjusting the spacing of the sawtooth grooves formed between the resonator and the tuning disk, the capacitance can be increased and the frequency reduced. Thus, frequency control can be achieved by adjusting the height of the resonator, which facilitates production and significantly increases the frequency tuning range.

[0014] 3. Testing showed that the frequency reduction of the cavity of the same size reached 21.7%, and when the tuning disk depth was 0.5mm, the frequency tuning reached 37MHz, which is much higher than the 6MHz frequency tuning of the conventional screw with a depth of 1mm. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the filter disclosed in this application;

[0017] Figure 2 The image shows the screw tuning measurement results for a conventional solution.

[0018] Figure 3 This is a diagram showing the detection results of the screw tuning amount of the filter disclosed in this application.

[0019] Explanation of reference numerals in the attached drawings: 1. Cavity; 2. Mounting post; 3. Resonator; 31. Resonant disk; 32. Resonant cavity; 33. Resonant inner ring; 34. Post; 4. Tuning disk; 41. Tuning cavity; 42. Tuning inner ring. Detailed Implementation

[0020] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0021] like Figure 1 As shown, a frequency-reducing resonator includes a matched resonator 3 and a tuning disk 4. Because the low-frequency range of the existing resonator 3 cannot meet the required specifications due to the limitation of the same single-cavity size, the resonant frequency cannot be changed. Therefore, the frequency-reducing resonator 3 of this application has a resonant disk 31 at its top. A resonant cavity 32 is formed within the resonant disk 31, and a resonant inner ring 33 is disposed within the resonant cavity 32. Correspondingly, a tuning cavity 41 is disposed at the bottom of the tuning disk 4, and a tuning inner ring 42 is disposed within the tuning cavity 41. The outer peripheral sidewall of the tuning cavity 41 and the tuning inner ring 42 are respectively used to insert into the inner and outer sides of the tuning inner ring 42, thereby forming a vertically bent and connected sawtooth groove structure. By adjusting the height, width, and length of the sawtooth groove, the capacitance can be increased and the frequency reduced; that is, by changing the shape of the resonator 3 and the tuning disk 4, the capacitance is increased, and the frequency is reduced.

[0022] Therefore, it can be seen that the outer peripheral sidewall of the tuning cavity 41 and the depth of the tuning inner ring 42 inserted into the resonant cavity 32 in this embodiment are adjustable. At the same time, a column 34 is provided on the resonator 3 at the bottom of the resonant disk 31, and the column 34 coincides with the axis of the resonant disk 31.

[0023] A filter comprising a down-frequency resonator as described above.

[0024] The filter includes a cavity 1. A mounting post 2 is provided along the axis at the bottom of the cavity 1. The mounting post 2 is used to connect and fix to a column 34. Meanwhile, a top cover is provided at the top of the cavity 1, and the top of the tuning disk 4 is connected and fixed to the top cover.

[0025] test:

[0026] 1. Tested using the same size;

[0027] 2. Implementation of frequency tuning quantity detection.

[0028] Based on a cavity of the same size, the frequency detected in this embodiment of the application is 532MHz. Using a conventional coaxial cavity filter with publication number CN202839916U, the frequency detected in this embodiment of the application is 680MHz. Therefore, the frequency reduction based on a cavity of the same size reaches 21.7%.

[0029] By adjusting the depth of the tuning disk in this embodiment, a frequency tuning level of 37 MHz is achieved when the tuning disk depth is 0.5 mm. Furthermore, when tested using a conventional coaxial cavity filter (CN202839916U), a frequency tuning level of 6 MHz was obtained with a 1 mm screw diameter, demonstrating that the filter in this embodiment significantly increases the frequency tuning level.

[0030] In summary, this application provides a frequency-reducing resonator and filter. This resonator and filter allows for capacitance adjustment by modifying the dimensions of the resonator 3 and the resonant disk 31, thereby increasing the capacitance and simultaneously reducing the frequency. Furthermore, adjusting the spacing of the sawtooth grooves formed between the resonator 3 and the tuning disk 4 increases the capacitance and reduces the frequency. Thus, frequency control is achieved by adjusting the height of the resonant disk 31, resulting in ease of production and a significantly increased frequency tuning range.

[0031] The terms “first,” “second,” “third,” “fourth,” etc., used in this application (if applicable) are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, or apparatus.

[0032] It should be noted that the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0033] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A down-conversion resonator comprising a resonator (3) and a tuning disc (4) matched to each other, characterized in that: The top of the resonator (3) is provided with a resonance disc (31), a resonance inner cavity (32) is formed in the resonance disc (31), and a resonance inner ring (33) is arranged in the resonance inner cavity (32); the bottom of the tuning disc (4) is provided with a tuning inner cavity (41), and a tuning inner ring (42) is arranged in the tuning inner cavity (41); wherein the outer circumferential side wall of the tuning inner cavity (41) and the tuning inner ring (42) are respectively used for inserting the inner and outer sides of the tuning inner ring (42).

2. A frequency down-converter as claimed in claim 1, characterized in that: The depth of the outer circumferential side wall of the tuning inner cavity (41) and the tuning inner ring (42) inserted into the resonance inner cavity (32) is adjustable.

3. The frequency downconverter of claim 1, wherein: The resonator (3) is provided with a stand column (34) at the bottom of the resonance disc (31), and the stand column (34) coincides with the axis of the resonance disc (31).

4. A filter characterized by: The frequency reduction resonator according to any one of claims 1-3 is adopted.

5. A filter according to claim 4, characterised in that: The cavity (1) is provided with a mounting column (2) at the bottom along the axis, the mounting column (2) is used for connecting and fixing with the stand column (34); the top of the cavity (1) is provided with an upper cover, and the top of the tuning disc (4) is connected and fixed with the upper cover.

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