CN203205510U - High-power low-pass filter - Google Patents
High-power low-pass filter Download PDFInfo
- Publication number
- CN203205510U CN203205510U CN 201320063306 CN201320063306U CN203205510U CN 203205510 U CN203205510 U CN 203205510U CN 201320063306 CN201320063306 CN 201320063306 CN 201320063306 U CN201320063306 U CN 201320063306U CN 203205510 U CN203205510 U CN 203205510U
- Authority
- CN
- China
- Prior art keywords
- housing
- pass filter
- low pass
- power low
- capacitor board
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a high-power low-pass filter. The high-power low-pass filter comprises a long strip shaped box type housing and input/output interfaces connected with the housing, wherein a plurality of accommodation cavities are disposed in the housing; capacitor plates are disposed on two side walls opposite to each accommodation cavity; an insulation sheet is disposed between each capacitor plate and each accommodation cavity side wall; a through hole is arranged in each separator plate; the capacitor plates on both sides of each separator plate are connected through a conductive member which penetrates through the through hole; a spiral coil is disposed in each accommodation cavity, and two ends of the spiral coil are respectively connected with the capacitor plates on two sides of the accommodation cavity; and the input/output interfaces are arranged on the accommodation cavity side walls at the head end and the tail end, and are connected with the capacitor plates inside the accommodation cavities. The high-power low-pass filter helps to effectively solves problems of big size, high processing difficulty and difficult debugging in low-pass filters in the prior art, is small in structural size, convenient for processing and debugging and low in cost, and has very high practical value.
Description
Technical field
The utility model relates to a kind of filter, especially a kind of high-power low pass filter.
Background technology
Low pass filter is the important component part of FM broadcasting emission system, and it is used for the high-end unwanted emission power of restriction tuned radio frequency, to avoid these unwanted emission to the interference of high band wireless transmitting system (for example television emission system).The high-power low pass filter of prior art generally adopts coaxial configuration, its electric capacity, inductance all adopt coaxial configuration, because outer conductor adopts copper pipe to make, insert in the copper pipe serial connection backs such as inner inductance, electric capacity, therefore in case machine, its structure just can't change adjustment, the low pass filter of this structure requirement on machining accuracy height not only, and coaxial inductance and coaxial capacitance all occupy bigger space, so last volume is very big.Open day be that the patent document that October 29, publication number in 2010 are CN101931113A discloses a kind of low pass filter, it is made of periodic structure coaxial line and impedance matching unit thereof.Comprise: have circular hollow cavity the external ground conductor, be arranged on internal signal conductor in the circular hollow cavity of described external ground conductor, be arranged on two or more first identical rosettes at internal signal conductor middle part and be separately positioned on two second identical rosettes at place, internal signal conductor two ends.This structure arranges second rosette that diameter is less, the impedance matching of execution cycle structure coaxial line and outside normal transmission line respectively by the both sides at the first bigger rosette of diameter.By using impedance matching unit, reduced the insertion loss of periodic structure transmission line effectively, improve the frequency of lower passband and passed through characteristic, and widened the stop-band frequency scope of periodic structure transmission line, the radio-frequency component in greater than the wide stopband range of cut-off frequency more than the abundant decay cut-off frequency.This low pass filter adopts traditional coaxial configuration, and therefore not only requirement on machining accuracy height, volume are big, and debugging is very difficult.
The utility model content
The utility model is big for the volume that the low pass filter that solves prior art exists, difficulty of processing is high and the problem of debug difficulties provides that a kind of volume is little, processing, debugging high-power low pass filter easily.
The utility model is to reach the concrete technical scheme that above-mentioned technical purpose adopts to be: a kind of high-power low pass filter, comprise housing and be connected input/output interface on the housing, described housing is the strip box structure, be provided with dividing plate in the housing, dividing plate is separated into the cavity volume that several are arranged in a linear with housing, the relative side walls of cavity volume is provided with capacitor board, be provided with insulating trip between capacitor board and the cavity volume sidewall, dividing plate is provided with through hole, link to each other by the electric-conductor that passes through hole between the capacitor board of dividing plate both sides, be provided with helical coil in the cavity volume, the two ends of helical coil link to each other with the capacitor board of cavity volume both sides respectively, described input/output interface is arranged on head end and the terminal cavity volume sidewall, and the interior capacitor board of the inner wire of input/output interface and cavity volume is connected.The utility model changes traditional coaxial configuration into box structure, housing can be opened from the side like this, distance by changing capacitor board and housing can the control capacittance amount size, also can change the length of helical coil or the size that form is regulated inductance, thereby reach the purpose of fine setting filter parameter, make low pass filter reach better technical indicator.In addition, the utility model adopts dividing plate that each inductance is separated in the different cavity volumes, because dividing plate and housing are all earth electrode, so the mutual inductance between the inductance can be ignored, can the parameter of other inductance not impacted when adjusting one of them inductance, made things convenient for the adjustment of low pass filter parameter.The capacitor board that is in two ends then directly connects input/output interface, is the electric capacity input pattern.Cassette shell of the present utility model is compared easy to process with coaxial configuration, and inductance adopts sped structure, electric capacity to adopt plate armature to compare with traditional coaxial configuration inductance, electric capacity, its volume can dwindle greatly, has therefore reduced the volume of low pass filter.
As preferably, electric-conductor is brass bolt, is provided with insulator between brass bolt and the dividing plate.The utility model adopts a brass bolt to pass capacitor board, the insulating trip of dividing plate both sides, the capacitor board of dividing plate both sides is fixed and is electrically connected, and adopt insulator to isolate between brass bolt and the dividing plate.
As preferably, output interface is 1-5/8 inch coaxial interface or 3-1/8 inch coaxial interface.The coaxial interface of 1-5/8 inch (41.3mm) can adapt to the transmitter of 1 to 5 kw of power grade, 3-1/8 inch (79.4mm) coaxial interface can adapt to the transmitter of 5 to 10 kw of power grades, can satisfy the power requirement of most of frequency-modulated broadcast transmitters like this.
As preferably, near the capacitor board area at housing two ends less than the capacitor board area that mediates.For the low pass filter that adopts the prototype filter design, the capacitor and inductor value of filter both sides is littler than middle capacitor and inductor value, in structure of the present utility model, only needs the corresponding area that dwindles capacitor board to get final product.In addition, also can adopt the insulating trip thickness at close housing two ends greater than the version of the insulating trip thickness that mediates.In like manner, the helical coil number of turns at close housing two ends is less than the helical coil number of turns that mediates.
As preferably, cavity volume is 2 to 5, symmetrical structure before and after capacitor board, the helical coil in the cavity volume is.2 cavity volumes are 5 element low pass filter structures of 2 inductance, 3 electric capacity, 5 cavity volumes are 11 element low pass filter structures of 5 inductance, 6 electric capacity, element is more many, the attenuation outside a channel characteristic of filter is more good, but structure relative complex, volume increases, and can be selected according to the actual conditions of transmitter.
As preferably, housing is spliced to form by bolt by base plate, side plate, end plate and cover plate, and input/output interface is separately positioned on the end plate at housing two ends and is located along the same line.Be spliced to form housing and have mounting or dismounting, debug advantage easily, and housing can be close to cabinet and install, be conducive to the heat radiation of filter.
The beneficial effects of the utility model are: it has solved effectively, and the volume that the low pass filter of prior art exists is big, difficulty of processing is high and the problem of debug difficulties, structural volume of the present utility model is little, convenient processing and debugging and cost are low, has very high practical value.
Description of drawings
Fig. 1 is a kind of perspective view of the present utility model;
Fig. 2 is a kind of structure cutaway view of the present utility model;
Fig. 3 is a kind of electrical schematic diagram of the present utility model.
Among the figure: 1. dividing plate, 2. cavity volume, 3. capacitor board, 4. insulating trip, 5. electric-conductor, 6. helical coil, 7. input/output interface, 8. insulator, 9. base plate, 10. side plate, 11. end plates, 12. cover plates.
Embodiment
Below by embodiment, and by reference to the accompanying drawings the embodiment of technical solutions of the utility model is further described.
Embodiment 1
In embodiment 1 as shown in Figure 1, a kind of high-power low pass filter, a kind of high-power low pass filter, comprise housing and be connected input/output interface 7 on the housing, input/output interface is 1-5/8 inch coaxial interface, described housing is the strip box structure, and housing is spliced to form by bolt by base plate 9, side plate 10, end plate 11 and cover plate 12, and input/output interface is separately positioned on the end plate at housing two ends and is located along the same line.Be provided with dividing plate 1 in the housing, if dividing plate is separated into housing 4 cavity volumes that are arranged in a linear 2, the relative side walls of cavity volume is provided with capacitor board 3, the capacitor board area at close housing two ends is less than the capacitor board area that mediates, be provided with insulating trip 4 between capacitor board and the cavity volume sidewall, dividing plate is provided with through hole, links to each other by the electric-conductor 5 that passes through hole between the capacitor board of dividing plate both sides, electric-conductor is brass bolt, is provided with insulator 8 between brass bolt and the dividing plate; Be provided with helical coil 6 in the cavity volume, the two ends of helical coil link to each other with the capacitor board of cavity volume both sides respectively, the helical coil number of turns at close housing two ends is less than the helical coil number of turns that mediates, capacitor board in the cavity volume, symmetrical structure before and after helical coil is, input/output interface is arranged on the cavity volume sidewall of head end and end, capacitor board in the inner wire of input/output interface and the cavity volume is connected, present embodiment is 4 inductance, 9 element low pass filter structure (see figure 3)s of 5 electric capacity, L1 wherein, L4 is the helical coil of two circles, L2, L3 is the helical coil of three circles, C1, C5 is by the electric capacity that constitutes between the capacitor board at low pass filter two ends and the end plate, C2, C3 and C4 are the electric capacity that constitutes between the capacitor board of dividing plate both sides and the dividing plate.
Embodiment 2
Embodiment 2 adopts 7 element low pass filter structures of 3 inductance, 4 electric capacity, cavity volume is 3, the insulating trip thickness at close housing two ends is greater than the insulating trip thickness that mediates, and input/output interface is 3-1/8 inch coaxial interface, and all the other are identical with embodiment 1.
In addition to the implementation, according to structural principle of the present utility model, those skilled in the art can realize easily such as 2 cavity volumes, the isostructural low pass filter of 5 cavity volumes, the utility model can use at 1 to 10 kilowatt of FM broadcasting transmitter, has that volume is little, convenient processing and debugging and low characteristics of cost.
Claims (8)
1. high-power low pass filter, comprise housing and be connected input/output interface on the housing, it is characterized in that: described housing is the strip box structure, be provided with dividing plate (1) in the housing, dividing plate is separated into several cavity volumes that is arranged in a linear (2) with housing, the relative side walls of cavity volume is provided with capacitor board (3), be provided with insulating trip (4) between capacitor board and the cavity volume sidewall, dividing plate is provided with through hole, link to each other by the electric-conductor (5) that passes through hole between the capacitor board of dividing plate both sides, be provided with helical coil (6) in the cavity volume, the two ends of helical coil link to each other with the capacitor board of cavity volume both sides respectively, described input/output interface (7) is arranged on head end and the terminal cavity volume sidewall, and the interior capacitor board of the inner wire of input/output interface and cavity volume is connected.
2. high-power low pass filter according to claim 1 is characterized in that described electric-conductor is brass bolt, is provided with insulator (8) between brass bolt and the dividing plate.
3. high-power low pass filter according to claim 1 is characterized in that described input/output interface is 41.3mm coaxial interface or 79.4mm coaxial interface.
4. high-power low pass filter according to claim 1 is characterized in that the capacitor board area at close housing two ends is less than the capacitor board area that mediates.
5. high-power low pass filter according to claim 1 is characterized in that the insulating trip thickness at close housing two ends is greater than the insulating trip thickness that mediates.
6. high-power low pass filter according to claim 1 is characterized in that the helical coil number of turns at close housing two ends is less than the helical coil number of turns that mediates.
7. according to claim 1 or 2 or 3 or 4 or 5 or 6 described high-power low pass filters, it is characterized in that cavity volume is 2 to 5, symmetrical structure before and after capacitor board, the helical coil in the cavity volume is.
8. according to claim 1 or 2 or 3 or 4 or 5 or 6 described high-power low pass filters, it is characterized in that housing is spliced to form by bolt by base plate (9), side plate (10), end plate (11) and cover plate (12), input/output interface is separately positioned on the end plate at housing two ends and is located along the same line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063306 CN203205510U (en) | 2013-02-05 | 2013-02-05 | High-power low-pass filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320063306 CN203205510U (en) | 2013-02-05 | 2013-02-05 | High-power low-pass filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203205510U true CN203205510U (en) | 2013-09-18 |
Family
ID=49149581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320063306 Expired - Fee Related CN203205510U (en) | 2013-02-05 | 2013-02-05 | High-power low-pass filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203205510U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509944A (en) * | 2018-12-06 | 2019-03-22 | 合肥本源量子计算科技有限责任公司 | A kind of powder microwave filter and preparation method thereof |
-
2013
- 2013-02-05 CN CN 201320063306 patent/CN203205510U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109509944A (en) * | 2018-12-06 | 2019-03-22 | 合肥本源量子计算科技有限责任公司 | A kind of powder microwave filter and preparation method thereof |
| CN109509944B (en) * | 2018-12-06 | 2021-07-13 | 合肥本源量子计算科技有限责任公司 | Powder microwave filter and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100576628C (en) | Band stop filter | |
| CN103855448A (en) | TM mode dielectric filter | |
| CN103682535A (en) | Coaxial cavity dual-band filter based on stepped impedance structure | |
| CN111052500B (en) | Antenna assembly and mobile terminal | |
| CN202434677U (en) | High pass filter | |
| CN101630766A (en) | Antiphase coupling elliptic function spiral wave filter | |
| CN203205510U (en) | High-power low-pass filter | |
| CN203260696U (en) | TM mode dielectric filter | |
| CN210111012U (en) | High-pass filter and communication cavity device with same | |
| CN203644914U (en) | Coaxial cavity dual-band filter based on step impedance structure | |
| CN216354692U (en) | Filter and communication device | |
| CN108879046B (en) | Cavity filter | |
| CN107508020A (en) | Resonator and elliptic function type low-pass filter | |
| CN103545580A (en) | Miniaturized adjustable band stop filter | |
| CN207320282U (en) | Resonator and elliptic function type low-pass filter | |
| CN202352806U (en) | Novel electric cross coupling structure | |
| CN106785252A (en) | New resistance filter apparatus | |
| CN202918414U (en) | Antenna isolator | |
| CN203072274U (en) | Ultra-wideband shielding cavity power supply filter | |
| CN205406687U (en) | Piece formula stromatolite ba lun wave filter | |
| CN216671879U (en) | Low-frequency combiner and antenna | |
| CN203481348U (en) | Low pass filter | |
| CN201838692U (en) | Band-stop filter | |
| CN202839921U (en) | Capacitive source coupling structure of cavity filter | |
| CN103474726B (en) | Elliptic Function Type low pass filter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20200205 |