CN207459135U - A kind of L frequency ranges narrowband cavity body filter - Google Patents
A kind of L frequency ranges narrowband cavity body filter Download PDFInfo
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- CN207459135U CN207459135U CN201720725937.4U CN201720725937U CN207459135U CN 207459135 U CN207459135 U CN 207459135U CN 201720725937 U CN201720725937 U CN 201720725937U CN 207459135 U CN207459135 U CN 207459135U
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- resonant rod
- baffle
- cavity
- cavity body
- frequency ranges
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Abstract
The utility model provides a kind of L frequency ranges narrowband cavity body filter, including medium cavity and the metal cover board being fastened at the top of medium cavity；Include the resonant rod of at least four parallel arrangement in the dielectric cavity body, wherein the first resonant rod is connected with the coaxle input end of input signal connector, the 4th resonant rod is connected with exporting the coaxial output line of signal connector；Baffle, the baffle and resonant rod parallel arrangement are equipped between each resonant rod；Each resonant rod includes first end and second end, and second end is internally provided with cylindrical cavity；The setting of the junction of the medium inside cavity and the first end is fluted, and the groove is filled with tin.The in vivo resonant rod of dielectric cavity of the utility model is parallel arrangement, and structure is compact, compact, suitable for most of occasions.
Description
Technical field
The utility model belongs to the present invention relates to communication and microwave technical field, more particularly, to a kind of L frequency ranges narrowband chamber
Fluid filter.
Background technology
Bandpass filter has very important application in communication with microwave technical field.Bandpass filter has frequency-selecting spy
Property, the harmonic signal of nonlinear device generation and the interference signal of signal intermodulation generation can be filtered out.Weigh bandpass filter
The major parameter of energy index has band connection frequency and relative bandwidth, Out-of-band rejection scope, pass band insertion loss, passband standing wave etc..
The bandpass filter of a variety of ways of realization is currently, there are, such as the LC bandpass filters of capacitance and inductance composition, micro-strip
Line band-pass filter, medium bandpass filter, Fbar bandpass filters, MEMS bandpass filters, LTCC bandpass filters and chamber
Fluid filter etc..Wherein, LC bandpass filters are usually used in there are the self-resonance of inductance the working frequency below C-band due to it；
The Out-of-band rejection degree of Microstrip Bandpass Filter is low, and substrate media loss makes its Q value relatively low, and time processing forms, it is difficult to
Debugging；Medium bandpass filter Out-of-band rejection degree is relatively low, is also easy to produce parasitic passband, and when application needs multi-stage cascade；Fbar band logicals are filtered
The operating frequency range of ripple device and MEMS bandpass filters is narrow and of high cost；LTCC bandpass filter working frequencies are relatively low, batch
Property it is poor, and Out-of-band rejection degree only could be improved by multi-stage cascade.Under relatively, cavity body filter has that processing cost is low, band
The advantages that outer degree of suppression is high, Q values are high, and can be by debugging to compensate the error of mechanical processing introducing, but cavity body filter
Volume it is larger, be not suitable for applied to the stringent occasion of volume requirement.
The content of the invention
In view of this, in view of this utility model is directed to one kind, and it is an object of the invention to provide L frequency ranges narrowbands
Cavity body filter, it is bigger to solve the volume of existing bandpass filter, it is impossible to the technical issues of meeting application demand.
In order to achieve the above objectives, the technical solution of the utility model is realized in：
A kind of L frequency ranges narrowband cavity body filter, including medium cavity and the metal cover board being fastened at the top of medium cavity；Institute
Giving an account of includes the resonant rod of at least four parallel arrangement in matter cavity, wherein the first resonant rod and input signal connector is coaxial
Input terminal is connected, and the 4th resonant rod is connected with exporting the coaxial output line of signal connector；It is all provided between each resonant rod
There are baffle, the baffle and resonant rod parallel arrangement；Each resonant rod includes first end and second end, inside second end
Equipped with cylindrical cavity.
Further, at least three baffle, the symmetrical arrangement of baffle, left and right ends are included in the dielectric cavity body
The length of baffle is 23.4mm, and the length of middle baffle plate is 25.65mm.
Further, the resonance pole length is 33.79mm, and spacing is 17.5mm between each resonant rod.
Further, threaded hole is provided on the baffle, the threaded hole is used to coordinate described in fastening with trip bolt
Baffle and the metal cover board.
Further, the medium cavity, metal cover board, resonant rod and baffle are adopted and are formed from aluminium.
Further, the junction of the medium inside cavity and the first end sets fluted, the groove filling
There is tin.
Compared with the prior art, a kind of L frequency ranges narrowband cavity body filter described in the utility model has the advantage that：
The in vivo resonant rod of dielectric cavity of the utility model is parallel arrangement, and structure is compact, compact, is suitable for
Most of occasions；Using special parameter, Out-of-band rejection height, the band standing internal wave of the L frequency ranges narrowband cavity body filter of acquisition are less than
1.3；The utility model utilizes metallic tin so that resonance is rod grounded good；Baffle is in close contact with metal cover board so that emulation knot
Fruit is consistent with measured result；Mainly using aluminium, lighter in weight is applied to so as to preferably in missile equipment the utility model.
Description of the drawings
The attached drawing for forming the part of the utility model is used to provide a further understanding of the present invention, this practicality is new
The schematic description and description of type does not form the improper restriction to the utility model for explaining the utility model.
In attached drawing：
Fig. 1 is the structure diagram described in the utility model embodiment；
Fig. 2 is the cross-sectional view of the structure described in the utility model embodiment；
Fig. 3 is the first structure diagram described in the utility model embodiment；
Fig. 4 is second of structure diagram described in the utility model embodiment.
Reference sign：
100- medium cavitys；200- resonant rods；210- first ends；220- second ends；211- interfaces；221- cavitys；300-
Baffle；310- threaded holes.
Specific embodiment
It should be noted that in the case where there is no conflict, the feature in embodiment and embodiment in the utility model can
To be mutually combined.
, it is necessary to which explanation, unless otherwise clearly defined and limited, term " are pacified in the description of the utility model
Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or integrally
Connection；Can be mechanical connection or electrical connection；It can be directly connected, can also be indirectly connected by intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, on being understood by concrete condition
State concrete meaning of the term in the utility model.
The utility model will be described in detail below with reference to the accompanying drawings and embodiments.
The volume of current existing bandpass filter is bigger, it is impossible to meet application demand, based on this, the embodiment of the present invention
A kind of L frequency ranges narrowband cavity body filter provided, the volume that can solve existing bandpass filter are bigger, it is impossible to which meeting should
The technical issues of with demand.
For ease of understanding the present embodiment, below to a kind of L frequency ranges narrowband cavity disclosed in the embodiment of the present invention
Wave filter describes in detail.
As shown in Figure 1 and Figure 2, a kind of L frequency ranges narrowband cavity body filter including medium cavity 100 and is fastened on medium cavity
The metal cover board at top；Include the resonant rod 200 of at least four parallel arrangement in the medium cavity 100, wherein the first resonant rod
200 are connected with the coaxle input end of input signal connector, the coaxial output line of the 4th resonant rod 200 and output signal connector
It is connected；Baffle 300, the baffle 300 and 100 parallel arrangement of resonant rod are equipped between each resonant rod 200；It is described every
A resonant rod 200 includes first end 210 and second end 220, and second end 220 is internally provided with cylindrical cavity 221；In order to make
First end 210 is grounded well, sets fluted, filling in the groove inside medium cavity 100 with the 210 of first end junction
There is metallic tin.
Include 4 resonant rods 200 and three baffles 300 in medium cavity 100.Specifically, the baffle 300 of the right and left
Length is 23.4 millimeters, and the length of intermediate baffle 300 is 25.65 millimeters.
Be provided with threaded hole 310 on the baffle 300, threaded hole 310 be used for trip bolt coordinate fastening baffle 300 with
Metal cover board.Specifically, threaded hole is also equipped in metal cover board with 310 corresponding position of threaded hole, trip bolt passes through gold
Belong to cover board in threaded hole and baffle 300 on threaded hole 310, baffle 300 is fixed with metal cover board so that baffle 300 and
Metal cover board is in close contact, so that simulation result is consistent with measured result.
Preferably, medium cavity 100, metal cover board, resonant rod 200 and baffle 300 are each made of aluminum.Metallic aluminium belongs to light
Metal so that the lighter in weight of the L frequency ranges narrowband cavity body filter of making is applied to so as to preferably in missile equipment.
As shown in Figure 3 and Figure 4, resonant rod 200 includes first end 210 and second end 220, the first resonant rod 200 and the 4th
Resonant rod is also comprising interface 211, for drawing electromagnetic energy.Preferably, a diameter of 5 millimeters of first end 210, length be
20.05 millimeters, a diameter of 9 millimeters of second end 220, length be 13.74 millimeters.Second end 220 is internally provided with cylinder
Cavity 221；
Preferably, a diameter of 6 millimeters of cavity 221, length are 13 millimeters.Using the L frequency ranges narrowband cavity of above-mentioned parameter
Wave filter Out-of-band rejection is high, band standing internal wave is less than 1.3.
Further, the side wall of tuning screw through medium cavity 100 enters in cavity 221, can be by adjusting tuning
Screw enters the depth of cavity 221 to adjust the centre frequency of L frequency ranges narrowband cavity body filter.
In conclusion the utility model is compact-sized, and it is small, so as to suitable for most of occasions；Using special parameter,
The Out-of-band rejection of the L frequency ranges narrowband cavity body filter of acquisition is high, band standing internal wave is less than 1.3；Tuning screw is located at medium cavity
Side, therefore the tailored appearance of L frequency ranges narrowband cavity body filter is beautiful；4 medium cavity, 100 inside and 210 company of first end
It is fluted to connect place's setting, metallic tin is filled in the groove so that first end 210 is grounded well；Screw thread is provided on baffle 300
Hole 310, trip bolt is through threaded hole 310 so that baffle 300 is in close contact with metal cover board, so that simulation result and reality
Result is surveyed to be consistent；6 medium cavitys 100, metal cover board, resonant rod 200 and baffle 300 are each made of aluminum so that the L frequency ranges of making
The lighter in weight of narrowband cavity body filter is applied to so as to preferably in missile equipment.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modifications, equivalent replacements and improvements are made should be included in the utility model
Protection domain within.
Claims (6)
1. a kind of L frequency ranges narrowband cavity body filter, it is characterised in that：Including medium cavity and the gold being fastened at the top of medium cavity
Belong to cover board；Include the resonant rod of at least four parallel arrangement in the dielectric cavity body, wherein the first resonant rod is connected with input signal
The coaxle input end of device is connected, and the 4th resonant rod is connected with exporting the coaxial output line of signal connector；Each resonant rod
Between be equipped with baffle, the baffle and resonant rod parallel arrangement；Each resonant rod includes first end and second end, the
Two ends are internally provided with cylindrical cavity.
2. a kind of L frequency ranges narrowband cavity body filter according to claim 1, it is characterised in that：Bag in the dielectric cavity body
Include at least three baffle, the symmetrical arrangement of baffle, the length of left and right ends baffle is 23.4mm, the length of middle baffle plate
It spends for 25.65mm.
3. a kind of L frequency ranges narrowband cavity body filter according to claim 1, it is characterised in that：The resonance pole length is
33.79mm, spacing is 17.5mm between each resonant rod.
4. a kind of L frequency ranges narrowband cavity body filter according to claim 1, it is characterised in that：It is provided on the baffle
Threaded hole, the threaded hole are used to fasten the baffle and the metal cover board with trip bolt cooperation.
5. a kind of L frequency ranges narrowband cavity body filter according to claim 1, it is characterised in that：The medium cavity, metal
Cover board, resonant rod and baffle, which are adopted, to be formed from aluminium.
6. a kind of L frequency ranges narrowband cavity body filter according to claim 1, it is characterised in that：The medium inside cavity
Fluted with the junction setting of the first end, the groove is filled with tin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725937.4U CN207459135U (en) | 2017-06-21 | 2017-06-21 | A kind of L frequency ranges narrowband cavity body filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720725937.4U CN207459135U (en) | 2017-06-21 | 2017-06-21 | A kind of L frequency ranges narrowband cavity body filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207459135U true CN207459135U (en) | 2018-06-05 |
Family
ID=62246492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720725937.4U Active CN207459135U (en) | 2017-06-21 | 2017-06-21 | A kind of L frequency ranges narrowband cavity body filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207459135U (en) |
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2017
- 2017-06-21 CN CN201720725937.4U patent/CN207459135U/en active Active
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