CN205319273U - Coaxial electrically tunable filter of multicavity - Google Patents
Coaxial electrically tunable filter of multicavity Download PDFInfo
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- CN205319273U CN205319273U CN201521134003.0U CN201521134003U CN205319273U CN 205319273 U CN205319273 U CN 205319273U CN 201521134003 U CN201521134003 U CN 201521134003U CN 205319273 U CN205319273 U CN 205319273U
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- cavity
- tunable filter
- coaxial electrical
- tuning plug
- resonator cavity
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Abstract
The utility model discloses a coaxial electrically tunable filter of multicavity, including drive mechanism, wave filter and the linear electric motor by drive circuit control, linear electric motor includes a drive screw and a drive nut, and drive screw's one end is followed stretch out linear electric motor's inside, and the other end is fixed on the deflector by drive nut. The wave filter includes that the structure is the same first to the N resonant cavity, N >= 2. Be equipped with inner conductor and tuning plug in the box body of first resonant cavity, tuning plug one end and deflector swing joint, its other end stretches into the inner conductor of first resonant cavity, stretches into the adjustable length. Being equipped with elastic connecting device, the O type installed from interior outside nestification in proper order on the inner conductor and enclosing and the sleeve, elastic connecting device is circular metal section of thick bamboo port broach one row of inboard circular arch, tuning plug and circular protruding electric the connection. The utility model provides high wave filter is stable, has optimized radio frequency filter's stopband characteristic, improves cavity filter's stop band suppression degree, has promoted communication equipment's interference killing feature.
Description
Technical field
The utility model relates to a kind of coaxial electrical tunable filter, and especially a kind of multi-cavity coaxial electrical tunable filter, belongs to art of microwave filters field.
Background technology
The Chinese utility model patent that prior art Patent number is CN201220549062.4 discloses " a kind of UHF waveband miniaturized electric regulating duplexer ", the Chinese utility model patent that the patent No. is CN201420768754.7 discloses " a kind of broad tuning coaxial electrical tunable filter ", the stepper-motor adopted is reaction formula or composite stepper motor respectively, motor uses geartransmission or shaft coupling to be connected with transmission rig, not only processing and assembly difficulty are big, volume is relatively large, and transmission precision also reduces due to gear clearance or shaft coupling assembling precision. When operating frequency requires higher, frequency localization precision can not satisfy the demands.
In the prior art, owing to design difficulty is big, what coaxial electrical tunable filter adopted is all the bandpass filter in four chambeies. In order to obtain the filtering performance of multi-cavity bandpass filter, two four chamber electrically adjusted band-pass filters are usually adopted to carry out cascade, but this kind sacrifices the way that volume exchanges immunity from interference for, stopband characteristic superposition efficiency is low, differential loss is big, under the equipment requirements of miniaturization, can not meet requirement.
In addition, transmission rig of the prior art adopts guide plate to be directly connected with guide rod, and when load is heavier, guide effect is not good. Especially in multiple resonator cavity linkage situation simultaneously, the overall assembling error of transmission rig makes the transmission of wave filter have some setbacks, and requires to improve to the carrying capacity of motor. The original interior conductor top of coaxial cavity electrically tunable filter is interdigitated electrode structure shell fragment, and the forming processes production cycle of metallic substance is longer, and yield rate is low.
Practical novel content
For deficiency of the prior art, the utility model provides a kind of multi-cavity coaxial electrical tunable filter.
For solving the problems of the technologies described above, technical solution adopted in the utility model is:
A kind of multi-cavity coaxial electrical tunable filter, comprises driving circuit, transmission rig, wave filter, two radio frequency interfaces; Described driving circuit is arranged on the outer wall of transmission rig; Described transmission rig comprises makes part, guide plate and more than one guide rod; Described each guide rod is parallel to each other, and is all connected with guide plate; Described wave filter comprise structure identical first to N resonator cavity, N >=2; Described first resonator cavity comprises box body and cover plate; Being provided with interior conductor and tuning plug in the box body of described first resonator cavity, described tuning plug and interior conductor electrical contact, its one end is flexibly connected with guide plate, and its other end stretches into the interior conductor of described first resonator cavity, is electrically connected with the interior conductor of described first resonator cavity; The length of the interior conductor that described tuning plug stretches into described first resonator cavity 6 is adjustable; Described radio frequency interface be separately positioned on first and N resonator cavity outer wall on, for input, export radiofrequency signal; It is characterized in that: also comprise a straight line motor controlled by driving circuit, described straight line motor comprises one and drives screw rod and a driving nut, one end of described driving screw rod is stretched out from the inside of described straight line motor 2, is fixed on described guide plate by described driving nut; Described driving screw rod is parallel with described each guide rod; Described each box body processing integrated with the support section of transmission rig 3.
Nut is vertical is connected with driving for described driving screw rod; Described driving nut is connected with guide plate plane; Described each tuning plug is to drive symmetric offset spread centered by nut. It is of value to wave filter stable movement like this. Conveniently debug products under little space.
Described each guide rod is flexibly connected with guide plate by linear bearings.
Described interior conductor is provided with O, sleeve and elastic connecting device, and described O is sleeved on outside elastic connecting device, and described sleeve is arranged on outside O; Described elastic connecting device is the row's circular protrusions of inside circular metal cylinder port comb, is uniformly distributed; Described tuning plug 9 is electrically connected with the circular protrusions of described elastic connecting device.
Described multi-cavity coaxial electrical tunable filter comprises six resonator cavitys; Described first to the 3rd resonator cavity shares a cover plate, and described 4th to the 6th resonator cavity shares a cover plate.
Described multi-cavity coaxial electrical tunable filter also comprises from ring radio frequency interface, be arranged on first or the 6th resonator cavity cover plate on.
Described linear bearings outside is straight barrel type.
Described tuning plug top is provided with cross moldeed depth groove.
It is provided with dustproof encloser outside described transmission rig.
Owing to have employed technique scheme, the beneficial effects of the utility model are:
1. the utility model have employed high efficiency straight line motor, be motion of translation by the converting rotary motion of motor internal, simplify design, it is to increase the processing and manufacturing efficiency of electrically tunable filter and assembling precision.
2. in transmission rig of the present utility model, linear bearings and the guide rod of good guidance is used to coordinate, realize the straight line transmission of electrically tunable filter, can reach at a high speed, movement effects stably, overcome the load that tuning plug fitting allowance causes overweight, slide be obstructed, transmission is smooth, the affected problem of performance of filter.
3. the straight line motor in the utility model carries the driving screw rod of stainless steel and the driving nut of model engineering plastic, frictional force is little, non-maintaining, there is extremely high weather resistance, what further increase electrically tunable filter changes frequently precision, frequency repeatability and product reliability.
4. wave filter of the present utility model adopts six resonator cavitys to be connected in series, and one-piece construction becomes many row's multiple row form arrangements, it is achieved structure minimumization, not only passband differential loss is little, and degree of suppression also greatly improves, and increases the use frequency of system, improving immunity from interference, equipment performance is optimized.
5. the coupling device that the interior conductor of intra resonant cavity of the present utility model adopts, is circular metal cylinder, has row's circular protrusions, be uniformly distributed, well contact with tuning plug inside port, and adopt O and sleeve to coordinate, it is to increase the stability of performance of filter.
6. tuning plug top of the present utility model processing cross moldeed depth groove, it is convenient that from different angles debugging, straight barrel type selected by linear bearings, than ring flange form of section save space, volume minimization.
Accompanying drawing explanation
Fig. 1 is front view of the present utility model;
Fig. 2 is the utility model left view sectional view;
Fig. 3 is inner conductor structure schematic diagram of the present utility model;
Wherein 1-driving circuit, 2-straight line motor, 3-transmission rig, 4-wave filter, 5-radio frequency interface, 6-first resonator cavity, 7-straight line motor drives screw rod, and 8-straight line motor drives nut, 9-tuning plug, 10-guide plate, 11-linear bearings, 12-guide rod, conductor in 13-, 14-O type circle, 15-sleeve, 16-elastic connecting device.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further details:
As shown in Figure 1-Figure 3, a kind of multi-cavity coaxial electrical tunable filter, comprises driving circuit 1, transmission rig 3, wave filter 4, two radio frequency interfaces 5; Described driving circuit 1 is arranged on the outer wall of transmission rig 3; Described transmission rig 3 comprises makes part, guide plate 10 and more than one guide rod 12; Described each guide rod 12 is parallel to each other, and is all connected with guide plate 10; Described wave filter 4 comprise structure identical first to N resonator cavity, N >=2; Described first resonator cavity 6 comprises box body and cover plate; It is provided with interior conductor 13 and tuning plug 9 in described first resonator cavity 6 box body, described tuning plug 9 and interior conductor 13 electrical contact, its one end is flexibly connected with guide plate 10, and its other end stretches into the interior conductor 13 of described first resonator cavity 6, is electrically connected with the interior conductor 13 of described first resonator cavity 6; The length of the interior conductor 13 that described tuning plug 9 stretches into described first resonator cavity 6 is adjustable; Described radio frequency interface be separately positioned on first and N resonator cavity outer wall on, for input, export radiofrequency signal; It is characterized in that: also comprise a straight line motor 2 controlled by driving circuit 1, described straight line motor 2 comprises one and drives screw rod 7 and a driving nut 8, one end of described driving screw rod 7 is stretched out from the inside of described straight line motor 2, is fixed on described guide plate 10 by described driving nut 8; Described driving screw rod 7 is parallel with described each guide rod; Described each box body processing integrated with the support section of transmission rig 3.
Nut 8 is vertical is connected with driving for described driving screw rod 7; Described driving nut 8 is connected with guide plate 10 plane; Described each tuning plug 9 is to drive symmetric offset spread centered by nut 8. It is of value to wave filter stable movement like this. Conveniently debug products under little space.
Described each guide rod 12 is flexibly connected with guide plate 10 by linear bearings 11.
Described interior conductor 13 is provided with O 14, sleeve 15 and elastic connecting device 16, and described O 14 is sleeved on outside elastic connecting device 16, and described sleeve 15 is arranged on outside O 14; Described elastic connecting device 16 is the row's circular protrusions of inside circular metal cylinder port comb, is uniformly distributed;Described tuning plug 9 is electrically connected with the circular protrusions of described elastic connecting device 16.
Described multi-cavity coaxial electrical tunable filter comprises six resonator cavitys; Described first to the 3rd resonator cavity shares a cover plate, and described 4th to the 6th resonator cavity shares a cover plate.
Described multi-cavity coaxial electrical tunable filter also comprises from ring radio frequency interface, be arranged on first or the 6th resonator cavity cover plate on.
Described linear bearings 11 outside is straight barrel type.
Described tuning plug 9 top is provided with cross moldeed depth groove.
It is provided with dustproof encloser outside described transmission rig 3.
The resonator cavity of described multi-cavity coaxial electrical tunable filter be metallic aluminium structure, O 14 is polytetrafluoroethylmaterial material, and elastic connecting device 16 is beryllium-bronze material.
Nut 8 is driven to adopt model engineering plastic, wear resistant corrosion resistant, it is not necessary to later maintenance.
In the present embodiment, driving circuit 1 and straight line motor 2 have wire, and driving circuit 1 adopts routine techniques means, and transmission rig 3 comprises the identical guide rod of two structures, wave filter adopts the form cascade of the resonator cavity series connection of quarter wave resonance, completes the function of six chamber coaxial band-pass filters. Adopt the electrically tunable filter resonance manner in such six chambeies, it is to increase the performance of equipment and system. Adopt straight line motor mode connection for transmission mechanism 3, simplify assembling relation, also facilitate later stage production debugging.
As shown in Figure 2, guide plate 10 is first equipped with two linear bearingss 11, linear bearings 11 refills guide rod 12, when being more conducive to the multiple resonator cavity of electrically tunable filter synchronously to change frequently, move smooth and easy, fluent, stable filter performance.
As shown in Figure 3, interior conductor 13 in each resonator cavity is the hollow circular-tube that beryllium-bronze material integration turner is shaped, the elastic connecting device 16 of row's circular protrusions is had inside port, can well contact with tuning plug 9 more reliably, O 14 is enclosed within the depression place, outside of elastic connecting device 16, sleeve 15 is close to O 14 and is arranged on elastic connecting device 16 outermost, plays effect of contraction, increases stability and the reliability of wave filter. There is multiple threaded hole at the back side of multi-cavity coaxial electrical tunable filter, conveniently is installed in signal equipment.
This kind realizes the application of linear transformation at motor internal, greatly simplifie design, make can directly use when not installing exterior mechanical linkage system straight line motor to carry out accurate linear movement in electrically tunable filter, and improve processing and manufacturing efficiency and the assembling precision of electrically tunable filter. Meanwhile, straight line motor carries the driving screw rod of stainless steel and the driving nut of model engineering plastic, and frictional force is little, non-maintaining, have extremely high weather resistance, and what therefore further increase electrically tunable filter changes precision, frequency repeatability and product reliability frequently.
The interior conductor of the utility model intra resonant cavity have employed novel elastic coupling device, is circular metal cylinder, has row's circular protrusions inside port, it is uniformly distributed, well contact with tuning plug, and adopt O and sleeve to coordinate, more improve the stability of performance of filter. And in traditional design, the elastic comb on interior conductor top is that end face of cylinder is directly evenly after grooving, artificial close up, heat treatment shaping, the contact of itself and tuning plug is the linear contact lay at edge, life-time service, tuning plug surface is had relatively big drawing to hinder by comb, destroys electroconductive coating.
The straight line motor that the utility model adopts high precision, high-level efficiency, structure to simplify does power wheel drive, use can at a high speed, the linear bearings of easy motion and guide rod coordinate and realize straight line transmission, wave filter has two or more prevention at radio-frequency port and multiple resonator cavity being connected in series, the point cantact structure that the frictional force that interior conductor work reliability in resonator cavity is high is less realizes more good radio-frequency-short, it is to increase wave filter width is stability frequently. The electrically tunable filter that the utility model provides, not only has stable passband amplitude-frequency characteristic in wider tuning range, also optimizes the stopband characteristic of radio-frequency filter, it is to increase the belt resistance inhibitor system of cavity body filter, improve the immunity from interference of signal equipment.
Claims (9)
1. a multi-cavity coaxial electrical tunable filter, comprises driving circuit (1), transmission rig (3), wave filter (4), two radio frequency interfaces (5);Described driving circuit (1) is arranged on the outer wall of transmission rig (3); Described transmission rig (3) comprises guide plate (10) and more than one guide rod (12); Described each guide rod (12) is parallel to each other, and is all connected with guide plate (10); Described wave filter (4) comprise structure identical first to N resonator cavity, N >=2; Described first resonator cavity (6) comprises box body and cover plate; Interior conductor (13) and tuning plug (9) it is provided with in the box body of described first resonator cavity (6), described tuning plug (9) and interior conductor (13) electrical contact, its one end is flexibly connected with guide plate (10), its the other end stretches into the interior conductor (13) of described first resonator cavity (6), is electrically connected with the interior conductor (13) of described first resonator cavity (6); The length of the interior conductor (13) that described tuning plug (9) stretches into described first resonator cavity (6) is adjustable; Described radio frequency interface be separately positioned on first and N resonator cavity outer wall on, for input, export radiofrequency signal; It is characterized in that: also comprise a straight line motor (2) controlled by driving circuit (1), described straight line motor (2) comprises one and drives screw rod (7) and driving nut (8), one end of described driving screw rod (7) is stretched out from the inside of described straight line motor (2), is fixed on described guide plate (10) by described driving nut (8); Described driving screw rod (7) is parallel with described each guide rod; The processing integrated with the support section of transmission rig (3) of described each box body.
2. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterised in that: described driving screw rod (7) is connected with driving nut (8) is vertical; Described driving nut (8) is connected with guide plate (10) plane; Described each tuning plug (9) is to drive symmetric offset spread centered by nut (8).
3. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterised in that: described each guide rod (12) is flexibly connected with guide plate (10) by linear bearings (11).
4. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterized in that: described interior conductor (13) is provided with O (14), sleeve (15) and elastic connecting device (16), described O (14) is sleeved on elastic connecting device (16) outside, and described sleeve (15) is arranged on O (14) outside; Described elastic connecting device (16) is the row's circular protrusions inside circular metal cylinder port comb, is uniformly distributed; Described tuning plug (9) is electrically connected with the circular protrusions of described elastic connecting device (16).
5. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterised in that: described multi-cavity coaxial electrical tunable filter comprises six resonator cavitys; Described first to the 3rd resonator cavity shares a cover plate, and described 4th to the 6th resonator cavity shares a cover plate.
6. a kind of multi-cavity coaxial electrical tunable filter according to claim 5, it is characterised in that: described multi-cavity coaxial electrical tunable filter also comprises from ring radio frequency interface, be arranged on first or the 6th resonator cavity cover plate on.
7. a kind of multi-cavity coaxial electrical tunable filter according to claim 3, it is characterised in that: described linear bearings (11) outside is straight barrel type.
8. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterised in that: described tuning plug (9) top is provided with cross moldeed depth groove.
9. a kind of multi-cavity coaxial electrical tunable filter according to claim 1, it is characterised in that: described transmission rig (3) outside is provided with dustproof encloser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134003.0U CN205319273U (en) | 2015-12-31 | 2015-12-31 | Coaxial electrically tunable filter of multicavity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521134003.0U CN205319273U (en) | 2015-12-31 | 2015-12-31 | Coaxial electrically tunable filter of multicavity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205319273U true CN205319273U (en) | 2016-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201521134003.0U Withdrawn - After Issue CN205319273U (en) | 2015-12-31 | 2015-12-31 | Coaxial electrically tunable filter of multicavity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205319273U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449324A (en) * | 2015-12-31 | 2016-03-30 | 中国电子科技集团公司第五十四研究所 | Multi-cavity coaxial electrically tunable filter |
| CN108448215A (en) * | 2018-05-16 | 2018-08-24 | 广东圣大电子有限公司 | A kind of C-band electricity tune cavity body filter |
-
2015
- 2015-12-31 CN CN201521134003.0U patent/CN205319273U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449324A (en) * | 2015-12-31 | 2016-03-30 | 中国电子科技集团公司第五十四研究所 | Multi-cavity coaxial electrically tunable filter |
| CN105449324B (en) * | 2015-12-31 | 2018-07-17 | 中国电子科技集团公司第五十四研究所 | A kind of coaxial electrically tunable filter of multi-cavity |
| CN108448215A (en) * | 2018-05-16 | 2018-08-24 | 广东圣大电子有限公司 | A kind of C-band electricity tune cavity body filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160615 Effective date of abandoning: 20180717 |
|
| AV01 | Patent right actively abandoned |