CN205265639U - Adjustable FM's of electric capacity loading full channel wave filter - Google Patents
Adjustable FM's of electric capacity loading full channel wave filter Download PDFInfo
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- CN205265639U CN205265639U CN201521071688.9U CN201521071688U CN205265639U CN 205265639 U CN205265639 U CN 205265639U CN 201521071688 U CN201521071688 U CN 201521071688U CN 205265639 U CN205265639 U CN 205265639U
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- wave filter
- capacitive load
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- 230000008878 coupling Effects 0.000 claims abstract description 14
- 238000010168 coupling process Methods 0.000 claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 claims abstract description 14
- 230000004308 accommodation Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000001276 controlling effect Effects 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 6
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- 230000037431 insertion Effects 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
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- 230000003071 parasitic effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
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Abstract
The utility model relates to an adjustable FM's of electric capacity loading full channel wave filter, the wave filter includes the casing, the casing constitutes one by left side cover board, right side cover board, upper cover plate, lower apron, back shroud and front shroud and seals the accommodation space, seal the accommodation space by the perpendicular to left cavity and right cavity are separated into to the common resonant cavity wall of apron down, coupling window has been seted up on the common resonant cavity wall. The adjustable FM wave filter of electric capacity loading full channel pass through the height of electric capacity loading reduction wave filter, change the current nonadjustable awkward situation of frequency modulation wave filter frequency, compromise pleasing to the eyely and the transportation.
Description
Technical field
The utility model belongs to communication technical field, specifically, relates to the wave filter of the adjustable FM of a kind of capacitive load all-channel.
Background technology
Wave filter is the important composition parts in wireless telecommunication system, can utilize it to carry out effective filtering to frequency. Wave filter various in style, performance is different, in practice, is also varied to the requirement of wave filter. According to the difference of its frequency response characteristic, wave filter is mainly divided into the types such as the logical and bandstop filter of low pass filter, high-pass filter, band. In radio and television transmittings antenna transmission system, the wave filter equipment that is absolutely necessary. For the out of band signal that emitter is produced suppresses, the frequency spectrum of specification output signal, adjunction output bandpass filter between the general output at emitter and antenna.
FM wave filter is the Primary Component that forms broadcast transmission multiplexer, and the general broadcast and TV radiating station station that is applied to can make the same secondary all channel antenna of multi-section emitter of different channel send without interfering with each other the technical equipment of program separately simultaneously. China's radio and television services develop rapidly, and a lot of radio station, TV station all cover increasing FM program, and in modern computer room construction equipment volume with attractive in appearance be also the key factor of consideration, thereby this wave filter product has wide application space.
Must be the future developments such as the frequency selectivity little towards size, Insertion Loss is little, integration is high, good, parasitic frequency band be farther meeting in power requirement situation wave filter, also be following development trend and the cascade simultaneously of wave filter smaller volume is put, not only improve the utilization rate in machine room space, also the aesthetic property that increases machine room, it is also more convenient to move simultaneously. Thereby capacitive load frequency modulation wave filter has more obvious competitive advantage and wide market prospects with respect to other small-power wave filters, and can represent the later trend of FM wave filter.
Utility model content
In order to solve above-mentioned the deficiencies in the prior art part, the frequency modulation wave filter that the purpose of this utility model is design a kind of small-power, small size, all-channel is adjustable, in order to reduce overall filter size, resonance rod adopts the device of capacitive load, this device can reduce the whole height of wave filter, and can increase the sensitivity of adjusting, height outside the chamber of minimizing adjusting device, to overcome defect of the prior art.
To achieve these goals, the utility model provides a kind of capacitive load all-channel adjustable FM wave filter, described wave filter comprises housing, described housing forms a sealing accommodation space by left side cover plate, right side cover plate, upper cover plate, lower cover, back shroud and front shroud, described sealing accommodation space is separated into left cavity and right cavity by the common resonator wall perpendicular to described lower cover, on described common resonator wall, offers coupling window; Wherein, in described left cavity, be provided with perpendicular to the first resonance rod first half of described upper cover plate with perpendicular to the first resonance rod Lower Half of described lower cover, in the upper end of the described first resonance rod first half, be equipped with the first adjusting rod, in the lower end of the described first resonance rod first half, be equipped with the first capacitive load mechanism, the upper end of the lower end of described the first adjusting rod and described the first capacitive load mechanism is fixed as one; The lower end of described the first capacitive load mechanism is located in the upper end of described the first resonance rod Lower Half, and come the first capacitive load mechanism described in regulation and control and put in the length of described the first resonance rod Lower Half by described the first adjusting rod, reach the object of controlling described left cavity resonant frequency with the capacitive load amount by controlling described left cavity; In described left cavity, on described lower cover, be vertically provided with described the first port device; In described right cavity, be provided with perpendicular to the second resonance rod first half of described upper cover plate with perpendicular to the second resonance rod Lower Half of described lower cover, in the upper end of the described second resonance rod first half, be equipped with the second adjusting rod, in the lower end of the described second resonance rod first half, be equipped with the second capacitive load mechanism, the upper end of the lower end of described the second adjusting rod and described the second capacitive load mechanism is fixed as one; The lower end of described the second capacitive load mechanism is located in the upper end of described the second resonance rod Lower Half, and come the second capacitive load mechanism described in regulation and control and put in the length of described the second resonance rod Lower Half by described the second adjusting rod, reach the object of controlling described right cavity resonant frequency with the capacitive load amount by controlling described right cavity; In described right cavity, on lower cover, be vertically provided with the second port device.
As to the further illustrating of the adjustable FM wave filter of described capacitive load all-channel of the present utility model, preferably, described coupling window is air window.
As further illustrating the described adjustable FM wave filter of capacitive load all-channel of the present utility model, described common resonator wall and described housing are each made of aluminum, the described first resonance rod first half, described the first resonance rod Lower Half, described the first capacitive load mechanism and described the first port device are made by red copper, and described the first adjusting rod is made up of stainless steel.
As to the further illustrating of the adjustable FM wave filter of described capacitive load all-channel of the present utility model, the bandwidth of the shape of described coupling window and size and wave filter matches.
As to the further illustrating of the adjustable FM wave filter of described capacitive load all-channel of the present utility model, preferably, described coupling window be shaped as rectangle.
As to the further illustrating of the adjustable FM wave filter of described capacitive load all-channel of the present utility model, preferably, the height of the adjustable FM wave filter of described capacitive load all-channel is only 58% of former wave filter height.
As can be seen here, the FM wave filter that capacitive load all-channel described in the utility model is adjustable, on resonance bar structure, adopt capacitive load design, and heap(ed) capacity is controllable, can meet the adjustable requirement of FM frequency range full frequency band, simultaneously in height also reduced by 42% than original FM wave filter, reducing amount is according to installing space, regulates sensitivity and can bear the many-sides such as power and consider determined value.
Brief description of the drawings
Fig. 1 is the capacitive load equivalent circuit diagram of the adjustable FM wave filter of capacitive load all-channel of the present utility model;
Fig. 2 is the adjustable FM wave filter of capacitive load all-channel of the present utility model;
Fig. 3 is the adjustable FM wave filter of capacitive load all-channel of the present utility model.
Description of reference numerals is as follows:
Housing 1, left cavity 2, right cavity 3, left side cover plate 11, right side cover plate 12, upper cover plate 13, lower cover 14, back shroud 15, the first resonance rod first half 21, the first resonance rod Lower Half 22, the first capacitive load mechanism 23, the first adjusting rod 24, the first port device 25, the second resonance rod first half 31, the second resonance rod Lower Half 32, the second capacitive load mechanism 33, the second adjusting rod 34, the second port device 35, common resonator wall 4, coupling window 41.
Detailed description of the invention
In order to make auditor can further understand structure of the present utility model, feature and other objects, now being accompanied by accompanying drawing in conjunction with appended preferred embodiment is described in detail as follows, the illustrated embodiment of this accompanying drawing is only for the technical solution of the utility model is described, and non-limiting the utility model.
First, please refer to Fig. 1. Fig. 1 is the capacitive load equivalent circuit diagram of the adjustable FM wave filter of capacitive load all-channel of the present utility model. As shown in Figure 1, principle of the present utility model: be also that metal pillar loads on capacitive load device practical significance. According to the analysis of capacitive load theory, if shunt capacitance is carried in half-wavelength waveguide resonator, the length of resonator will shorten and resonant frequency is constant. The charger of resonance rod can be equivalent to shunt capacitance, along with the first capacitive load mechanism 23 enters the size of the first resonance rod Lower Half 22 and the second capacitive load mechanism 33, to enter the size of the second resonance rod Lower Half 32 more and more longer, loading capacitance can be increasing, easily knows that by circuit general principle its resonant frequency can be more and more lower. By wave filter basic theories, the corresponding corresponding frequency of corresponding resonance length, and the corresponding corresponding cavity whole height of corresponding resonance rod, so the housing depth of our required frequency range can reduce with the increase of its heap(ed) capacity accordingly. But the increase of heap(ed) capacity, can improve the insertion loss of overall filter, reduce the peak power that it can bear, and improve it and regulate sensitivity, simultaneously sensitivity is too high also can increase the operation easier that daily transmitting station regulates, so heap(ed) capacity, insertion loss, can to bear power, regulate sensitivity, installing space several respects be all to need to consider while designing at the wave filter initial stage.
Secondly, please refer to Fig. 2 and 3. Fig. 2 and 3 is the FM wave filter adjustable according to capacitive load all-channel of the present utility model. as shown in Figures 2 and 3, capacitive load all-channel described in the utility model is adjustable FM wave filter, described wave filter comprises housing 1, housing 1 is by left side cover plate 11, right side cover plate 12, upper cover plate 13, lower cover 14, back shroud 15 and front shroud (not shown) form a sealing accommodation space, described sealing accommodation space is separated into left cavity 2 and right cavity 3 by the common resonator wall 4 perpendicular to lower cover 14, common resonator wall 4 and housing 1 are each made of aluminum, on common resonator wall 4, offer coupling window 41, the bandwidth of the shape of coupling window 41 and size and wave filter matches, wherein, in left cavity 2, be provided with perpendicular to the first resonance rod first half 21 of upper cover plate 13 with perpendicular to the first resonance rod Lower Half 22 of lower cover 14, in the upper end of the first resonance rod first half 21, be equipped with the first adjusting rod 24, in the lower end of the first resonance rod first half 21, be equipped with first lower end of capacitive load mechanism 23, the first adjusting rods 24 and the upper end of the first capacitive load mechanism 23 is fixed as one, the lower end of the first capacitive load mechanism 23 is located in the upper end of the first resonance rod Lower Half 22, and come regulation and control the first capacitive load mechanism 23 and put in the length of the first resonance rod Lower Half 22 by the first adjusting rod 24, reach the object of controlling left cavity 2 resonant frequencies with the capacitive load amount by controlling left cavity 2, on the interior lower cover 14 of left cavity 2, be vertically provided with first port device 25, the first resonance rod first halves 21, the first resonance rod Lower Half 22, the first capacitive load mechanism 23 and the first port device 25 and make by red copper, the first adjusting rod 24 is made up of stainless steel, in right cavity 3, be provided with perpendicular to the second resonance rod first half 31 of upper cover plate 13 with perpendicular to the second resonance rod Lower Half 32 of lower cover 14, in the upper end of the second resonance rod first half 31, be equipped with the second adjusting rod 34, in the lower end of the second resonance rod first half 31, be equipped with second lower end of capacitive load mechanism 33, the second adjusting rods 34 and the upper end of the second capacitive load mechanism 33 is fixed as one, the lower end of the second capacitive load mechanism 33 is located in the upper end of the second resonance rod Lower Half 32, and come regulation and control the second capacitive load mechanism 33 and put in the length of the second resonance rod Lower Half 32 by the second adjusting rod 34, reach the object of controlling right cavity 3 resonant frequencies with the capacitive load amount by controlling right cavity 3, on the interior lower cover 14 of right cavity 3, be vertically provided with the second port device 35. wherein, the first port device 25 and the second port device 35 form input and output coupling device. and, the FM wave filter that capacitive load all-channel of the present utility model is adjustable meets the adjustable requirement of FM frequency range full frequency band, simultaneously in height also reduced by 42% than original FM wave filter, reducing amount is according to installing space, regulates sensitivity and can bear the many-sides such as power and consider determined value.
In the utility model, coupling window 41 is the rectangle air windows that are applicable to arrowband, and the bandwidth of positive and negative 200KHz, is designed according to actual client's demand, to keep the uniformity of standing-wave ratio. in the utility model, capacitive load amount is mainly the length adjustment that is put in the length of the first resonance rod Lower Half 22 and the second capacitive load mechanism 33 and put in the second resonance rod Lower Half 32 by the first capacitive load mechanism 23 in Fig. 2, put in the length of the first resonance rod Lower Half 22 and the second capacitive load mechanism 33 and put in the length of the second resonance rod Lower Half 32 by regulating the first adjusting rod 24 outside chamber and the second adjusting rod 34 to control respectively the first capacitive load mechanism 23, when the length putting in more, the heap(ed) capacity of electric capacity is just larger, the corresponding resonant frequency of equal height cavity will reduce, the all-channel of accomplishing frequency modulation 87MHz-108MHz with this is adjustable, in addition when in the situation that heap(ed) capacity increases, the insertion loss of whole cavity can increase thereupon. as can be seen here, this utility model can be reduced the height of wave filter greatly by capacitive load, also can change the nonadjustable difficult situation of existing frequency modulation filter frequencies simultaneously.
Need statement, above-mentioned utility model content and detailed description of the invention are intended to prove the practical application of technical scheme that the utility model provides, and should not be construed as the restriction to the utility model protection domain. Those skilled in the art are in spirit of the present utility model and principle, when doing various amendments, be equal to and replace or improve. Protection domain of the present utility model is as the criterion with appended claims.
Claims (6)
1. the wave filter of the adjustable FM of capacitive load all-channel, it is characterized in that, described wave filter comprises housing (1), housing (1) forms a sealing accommodation space by left side cover plate (11), right side cover plate (12), upper cover plate (13), lower cover (14), back shroud (15) and front shroud, described sealing accommodation space is separated into left cavity (2) and right cavity (3) perpendicular to the common resonator wall (4) of lower cover (14), on common resonator wall (4), offers coupling window (41); Wherein,
In left cavity (2), be provided with perpendicular to the first resonance rod first half (21) of upper cover plate (13) with perpendicular to the first resonance rod Lower Half (22) of lower cover (14), in the upper end of the first resonance rod first half (21), be equipped with the first adjusting rod (24), in the lower end of the first resonance rod first half (21), be equipped with the first capacitive load mechanism (23), the upper end of the lower end of the first adjusting rod (24) and the first capacitive load mechanism (23) is fixed as one; The lower end of the first capacitive load mechanism (23) is located in the upper end of the first resonance rod Lower Half (22), and come regulation and control the first capacitive load mechanism (23) and put in the length of the first resonance rod Lower Half (22) by the first adjusting rod (24), to reach the object of control left cavity (2) resonant frequency by the capacitive load amount of controlling left cavity (2); On the interior lower cover of left cavity (2) (14), be vertically provided with the first port device (25);
In right cavity (3), be provided with perpendicular to the second resonance rod first half (31) of upper cover plate (13) with perpendicular to the second resonance rod Lower Half (32) of lower cover (14), in the upper end of the second resonance rod first half (31), be equipped with the second adjusting rod (34), in the lower end of the second resonance rod first half (31), be equipped with the second capacitive load mechanism (33), the upper end of the lower end of the second adjusting rod (34) and the second capacitive load mechanism (33) is fixed as one; The lower end of the second capacitive load mechanism (33) is located in the upper end of the second resonance rod Lower Half (32), and come regulation and control the second capacitive load mechanism (33) and put in the length of the second resonance rod Lower Half (32) by the second adjusting rod (34), to reach the object of control right cavity (3) resonant frequency by the capacitive load amount of controlling right cavity (3); On the interior lower cover of right cavity (3) (14), be vertically provided with the second port device (35).
2. wave filter as claimed in claim 1, is characterized in that, coupling window (41) is air window.
3. wave filter as claimed in claim 2, it is characterized in that, common resonator wall (4) and housing (1) are each made of aluminum, the first resonance rod first half (21), the first resonance rod Lower Half (22), the first capacitive load mechanism (23) and the first port device (25) are made by red copper, and the first adjusting rod (24) is made up of stainless steel.
4. wave filter as claimed in claim 2, is characterized in that, the bandwidth of the shape of coupling window (41) and size and wave filter matches.
5. wave filter as claimed in claim 3, is characterized in that, coupling window (41) be shaped as rectangle.
6. wave filter as claimed in claim 1, is characterized in that, the height of the adjustable FM wave filter of described capacitive load all-channel is only 58% of former wave filter height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071688.9U CN205265639U (en) | 2015-12-21 | 2015-12-21 | Adjustable FM's of electric capacity loading full channel wave filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521071688.9U CN205265639U (en) | 2015-12-21 | 2015-12-21 | Adjustable FM's of electric capacity loading full channel wave filter |
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| Publication Number | Publication Date |
|---|---|
| CN205265639U true CN205265639U (en) | 2016-05-25 |
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| CN201521071688.9U Expired - Fee Related CN205265639U (en) | 2015-12-21 | 2015-12-21 | Adjustable FM's of electric capacity loading full channel wave filter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323525A (en) * | 2019-07-02 | 2019-10-11 | 闻泰科技(无锡)有限公司 | Board structure of circuit |
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- 2015-12-21 CN CN201521071688.9U patent/CN205265639U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323525A (en) * | 2019-07-02 | 2019-10-11 | 闻泰科技(无锡)有限公司 | Board structure of circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160525 |
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| CF01 | Termination of patent right due to non-payment of annual fee |