CN209088038U - A kind of pattern-band small cavity filter - Google Patents
A kind of pattern-band small cavity filter Download PDFInfo
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- CN209088038U CN209088038U CN201821782852.0U CN201821782852U CN209088038U CN 209088038 U CN209088038 U CN 209088038U CN 201821782852 U CN201821782852 U CN 201821782852U CN 209088038 U CN209088038 U CN 209088038U
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Abstract
The utility model discloses a kind of pattern-band small cavity filter, including cavity, four resonators of cover board and setting in the cavity, it is characterized in that, resonator includes resonant rod and the capacitor loading disc that resonant rod bottom is arranged in, the resonant rod upper end is equipped with adjustment screw rod, and dielectric ring is equipped between the resonant rod and adjustment screw rod, and the resonator is arranged using special angle.The pattern-band small cavity filter of the utility model uses four resonator structures, pass through vertical 90 degree and oblique 45 degree layouts, the functional requirement of low insertion loss, high out-of-side rejection, small size is realized, provides strong support for miniaturization, the integrated propulsion of radar system.
Description
Technical field
The utility model relates to microwave technical field more particularly to a kind of pattern-band small cavity filters.
Background technique
Currently, the transmitting-receiving as radar communications system front end Primary Component is filtered with the continuous development of radar communication technology
The height of wave device, performance directly affects the quality of radar communication.It, need to be to filtering when carrying out radar communications system master-plan
Device insertion loss, Out-of-band rejection, standing-wave ratio, dimensional weight carry out emphasis consideration: because the insertion loss of filter directly affects
The transmission power of system, Out-of-band rejection directly affect the anti-interference ability of system；Standing-wave ratio directly affects of front and back end device
Match；Outer dimension and weight are particularly important for vehicle-mounted, airborne, Shipboard Radar System, directly affect system
Maneuverability.The radar system of a new generation, is integrated with more T/R components and antenna element unit, in order to obtain better machine
Kinetic force and operating distance, it is desirable that form the component of system towards miniaturization, integrated development.Traditional cavity body filter, in order to
Higher Out-of-band rejection is obtained, higher Out-of-band rejection is realized often through resonant cavity quantity is increased, the problem of thus bringing
It is the insertion loss for increasing filter, the outer dimension and weight for increasing filter, is unable to satisfy the radar system of a new generation
The demand of system.
Summary of the invention
Aiming at the problems existing in the prior art, the purpose of this utility model is to provide a kind of small sizes and resistance to high power
Pattern-band small cavity filter.
To achieve the above objectives, the utility model adopts the following technical solution.
A kind of pattern-band small cavity filter, including cavity, four resonators of cover board and setting in the cavity,
It is characterized in that, resonator includes resonant rod and the capacitor loading disc that resonant rod bottom is arranged in, and the resonant rod lower end is equipped with
Adjustment screw rod, is equipped with dielectric ring between the resonant rod and adjustment screw rod, the resonator is arranged using special angle.
As a further illustration of the above scheme, the capacitive load disk is the rectangle aluminum metal film of 1mm thickness.
As a further illustration of the above scheme, the dielectric ring is politef dielectric ring, the dielectric ring passes through
Internal diameter, outer diameter and length are controlled, dielectric ring and resonant rod, adjusting screw rod is made to be formed and be fitted close.
As a further illustration of the above scheme, first resonator and the 4th resonator in four resonators
Vertical level is fixed, second and the oblique 45 degree of fixations of third resonator.
As a further illustration of the above scheme, the size of the filter is not more than 96 × 58 × 32mm.
As a further illustration of the above scheme, the resonance rod outer surface is silver-plated.
The beneficial effects of the utility model are:
One, using four resonator structures, by vertical 90 degree and oblique 45 degree layouts, reduce the cavity length of resonator with
Obtain suitable resonance frequency.
Two, by introducing PTFE medium ring between resonant rod and adjusting screw rod, in the feelings for obtaining same performance
Under condition, the size of product is effectively shortened；Add a sheet metal by the bottom in resonant rod, loading capacitance can be improved, to reach
To the purpose for shortening resonance pole length.
Detailed description of the invention
Fig. 1 show the resonator three-dimensional structure diagram of the utility model.
Fig. 2 show the cavity body filter structure chart of the utility model.
Fig. 3 show the diagrammatic cross-section along Fig. 2A A
Description of symbols:
1: cavity body filter, 2: inner cavity, 3: resonator, 4: capacitive load disk, 5: adjustment screw rod, 6: dielectric ring.
Specific embodiment
In the description of the present invention, it should be noted that for the noun of locality, if any term " center ", " transverse direction ",
" longitudinal direction ", " length ", " width ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top",
The indicating positions such as "bottom", "inner", "outside", " clockwise ", " counterclockwise " and positional relationship are orientation based on the figure or position
Relationship is set, narration the utility model is merely for convenience of and simplifies description, rather than the device or element of indication or suggestion meaning
It must have a particular orientation, constructed and operated with particular orientation, should not be understood as the specific protection model for limiting the utility model
It encloses.
In addition, being used for description purposes only if any term " first ", " second ", it is not understood to indicate or imply relatively heavy
The property wanted or the quantity for implicitly indicating technical characteristic." first " is defined as a result, " second " feature can be expressed or implicit include
One or more this feature, in the utility model description, " at least " is meant that one or more, unless otherwise bright
It is really specific to limit.
In the present invention, except as otherwise clear stipulaties and restriction, if any term " assembling ", " connected ", " connection " term
It should go to understand as broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It is also possible to machine
Tool connection；It can be directly connected, be also possible to be connected by intermediary, can be and be connected inside two elements.For
For those of ordinary skill in the art, can understand as the case may be above-mentioned term in the present invention specifically contain
Justice.
In utility model, unless otherwise specified and limited, fisrt feature second feature "upper" or "lower" can be with
It is directly contacted including the first and second features, also may include that fisrt feature and second feature are not direct contacts but pass through it
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " under " and " above " include fisrt feature
It right above second feature and oblique upper, or is only to indicate that first feature horizontal height is higher than the height of second feature.First
Feature second feature " on ", " under " and " below " include that fisrt feature is directly under or diagonally below the second feature, or only
Only indicate that first feature horizontal height is lower than second feature.
Below with reference to the attached drawing of specification, specific embodiment of the present utility model is further described, makes this reality
With novel technical solution and its benefits are clearer.It is exemplary for describing embodiment below with reference to attached drawing
, it is intended to it explains the utility model, and should not be understood as limiting the present invention.
As shown in Figure 1 to Figure 3, a kind of pattern-band small cavity filter, including cavity, cover board and setting are in the cavity
Four resonators, which is characterized in that resonator 3 includes resonant rod and is arranged in the capacitor loading disc 4 of resonant rod bottom, institute
It states resonant rod lower end and is equipped with adjustment screw rod 5, dielectric ring 6 is equipped between the resonant rod and adjustment screw rod, the resonator 3 uses
Special angle arrangement.
Wherein, capacitive load disk 4 is that the rectangle aluminum metal film of 20*10*1mm makes under same resonance pole length,
Play the role of increasing loading capacitance.Entire resonant rod uses silver-plated process using surface simultaneously, can increase the product of resonator
Quality factor Q value, to achieve the purpose that reduce insertion loss.
Preferably, dielectric ring 6 is politef dielectric ring, and PTFE medium ring length is 27mm, and internal diameter is
2.7mm, outer diameter 5mm；The outer ring of dielectric ring and the inner cavity of resonant rod form close fit, the inner hole of dielectric ring and screw rod of adjusting
5 form close fit.It is fitted close the formation between three, guarantees product reliability and stability.
It is further preferred that in order to realize small size structure, using resonator 3 using the layout structure of different rotation directions: the
One resonator and the 4th resonator are using arragement construction perpendicular to the ground, and second with third resonator using oblique 45 ° knots
Structure, effectively shortens the length dimension of entire resonant cavity, while guaranteeing the electrical property of filter, achievees the purpose that miniaturization, makes
The size Control of resonant cavity is obtained in≤80 × 42 × 27.1mm.
Compared with prior art, a kind of pattern-band small cavity filter provided in this embodiment, has the following characteristics that
1) four resonator structures are used, by vertical 90 degree and oblique 45 degree layouts, cavity length and the acquisition for reducing resonator are suitable
Resonance frequency.2) by introducing PTFE medium ring between resonant rod and adjusting screw rod, same performance is being obtained
In the case of, effectively shorten the size of product；Add a sheet metal structure by the bottom in resonant rod, load electricity can be improved
Hold, to achieve the purpose that shorten resonance pole length.
From the foregoing description of structures and principles it should be understood by those skilled in the art that, the utility model
It is not limited to above-mentioned specific embodiment, it is equal using the improvement of techniques well known and substitution on the basis of the utility model
The protection scope of the utility model is fallen in, the protection scope of the utility model should be limited by each claim and its equivalent
It.The part not illustrated in specific embodiment is the prior art or common knowledge.
Claims (7)
1. a kind of pattern-band small cavity filter, including cavity, cover board, output end, input terminal and four resonators, described
Resonator is fixed in the cavity, and the output end and input terminal are separately positioned on cavity, which is characterized in that resonator packet
Resonant rod and the capacitor loading disc that resonant rod bottom is set are included, the resonant rod lower end is equipped with adjustment screw rod, the resonance
Dielectric ring is equipped between bar and adjustment screw rod, the resonator is using vertical level or oblique 45 degree of arrangements.
2. pattern-band small cavity filter according to claim 1, which is characterized in that the capacitive load disk is 1mm
Thick rectangle aluminum metal film.
3. pattern-band small cavity filter according to claim 1, which is characterized in that the resonator passes through adjustment
Screw rod is fixed in the cavity.
4. pattern-band small cavity filter according to claim 1, which is characterized in that the dielectric ring is poly- tetrachloro
Ethylene dielectric ring, the dielectric ring form dielectric ring and resonant rod, adjusting screw rod tightly by control internal diameter, outer diameter and length
Close fit.
5. pattern-band small cavity filter according to claim 1, which is characterized in that four resonators are by row
Column sequence is divided into the first resonator, the second resonator, third resonator and the 4th resonator, first resonator and the 4th
Resonator vertical level is fixed, the second resonator and the oblique 45 degree of fixations of third resonator.
6. pattern-band small cavity filter according to claim 1, which is characterized in that the size of the filter is not
Greater than 96mm × 58mm × 32mm.
7. pattern-band small cavity filter according to claim 1, which is characterized in that the resonance rod outer surface plating
Silver.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821782852.0U CN209088038U (en) | 2018-10-31 | 2018-10-31 | A kind of pattern-band small cavity filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821782852.0U CN209088038U (en) | 2018-10-31 | 2018-10-31 | A kind of pattern-band small cavity filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209088038U true CN209088038U (en) | 2019-07-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821782852.0U Active CN209088038U (en) | 2018-10-31 | 2018-10-31 | A kind of pattern-band small cavity filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578053A (en) * | 2024-01-17 | 2024-02-20 | 成都宇恒博电子科技有限公司 | Cavity filter capable of reducing out-of-band rejection of filter |
-
2018
- 2018-10-31 CN CN201821782852.0U patent/CN209088038U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117578053A (en) * | 2024-01-17 | 2024-02-20 | 成都宇恒博电子科技有限公司 | Cavity filter capable of reducing out-of-band rejection of filter |
| CN117578053B (en) * | 2024-01-17 | 2024-03-29 | 成都宇恒博电子科技有限公司 | Cavity filter for improving out-of-band rejection performance of filter |
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