CN203242726U - Novel low-frequency helical filter - Google Patents
Novel low-frequency helical filter Download PDFInfo
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- CN203242726U CN203242726U CN 201220652659 CN201220652659U CN203242726U CN 203242726 U CN203242726 U CN 203242726U CN 201220652659 CN201220652659 CN 201220652659 CN 201220652659 U CN201220652659 U CN 201220652659U CN 203242726 U CN203242726 U CN 203242726U
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- helical
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Abstract
The utility model relates to the filter field and specifically discloses a novel low-frequency helical filter, which can be applied to broadcast communication systems and other wireless communication systems. The novel low-frequency helical filter comprises a metal shielding chamber and a top cover assembled with the shielding chamber. Coupling separator plates which are arranged inside the chamber divide the shielding chamber into a plurality of resonant cavities. A helical resonator is arranged inside each resonant cavity. Each helical resonator comprises a medium frame and helical resonance coils supported by the medium frame. Helical grooves are arranged on each medium frame. The helical resonance coils are accommodated inside the grooves. The helical resonance coils are thus prevented from shaking in a low-frequency working environment. The frequency change problem caused by shaking is thus solved. The working stability of the filter is thus enhanced.
Description
[technical field]
The utility model relates to filter field, specifically refers to a kind of novel low-frequency screw-filter that is applied in broadcast communication and other wireless communication system.
[background technology]
Along with the fast development of mobile communication technology, electromagnetic signal is day by day intensive, complicated in recent years, and is no matter be at commercial communication equipment or military communications equipment, more and more higher to requirement anti-interference and under the low frequency operation state.In order to improve antijamming capability, what generally adopt is to realize at receiving front-end or emission rear end increase high performance filter.Because the insertion loss of spiral cavity filter is little, selectivity is high, easy processing and manufacturing etc., is widely used in the communication technical field, realize that frequency selects and signal testing function.
Usually the spiral cavity filter comprises the shield that metallic cavity and the fixing assembling of a loam cake consist of, be provided with the spiral resonance oscillator that the oscillator skeleton supports in the shield, corresponding each the spiral resonance oscillator of loam cake and coupling dividing plate spiral are adjustable to be provided with the frequency modulation bolt and to transfer the coupling bolt.The length of the spiral resonance oscillator of spiral cavity filter is 1/4 λ, can obtain at 1/4 λ resonance the signal curve of needs, but at 3/4 λ, 5/4 λ ... can produce the resonance passband, this intrinsic resonance passband can produce signal and disturb, especially in the 300MHz scope, the signal in it is produced sizable interference, the low frequency operation unstable properties affects user's normal use.For another example, suppress without harmonic wave if use the filter of signal deteching circuit, affect the detection of useful signal because of the existence of its triple-frequency harmonics passband, be difficult in actual applications adjustment and reach required inhibition precision, this will affect the service behaviour of filter undoubtedly.
[utility model content]
The purpose of this utility model is to improve the Out-of-band rejection degree of screw-filter, and enabling in the low frequency operation environment can steady operation and a kind of novel low-frequency screw-filter is provided.
A kind of novel low-frequency screw-filter, comprise metallic shield cavity and the top cover of assembling with shielding cavity, be provided with the coupling dividing plate in the described shielding cavity, described coupling dividing plate is separated into a plurality of resonant cavitys with shielding cavity, be provided with helical resonator in described each resonant cavity, wherein said helical resonator comprises medium skeleton and the spiral resonance coil that is supported by the medium skeleton, and described medium skeleton is provided with helical groove, and described spiral resonance coil is contained in the groove.
Preferably, described spiral resonance coil is wrapped on the medium skeleton.
Preferably, be installed on the tuning bolt of adjustable setting on the described protecgulum corresponding to the position of helical resonator.
Preferably, the quantity of described resonant cavity is six, two two adjacent settings, and described resonant cavity all is one-time formed side's cavity configurations.
Preferably, the quantity of described helical resonator is six.
Described medium skeleton adopts poly-four Buddhist vinyl materials to make.
Described spiral resonance coil is that stainless steel material is made.
Described medium skeleton is provided with vertical slot to make way away from an end of protecgulum, and an end of described spiral resonance coil is contained in the slot to make way.
Low frequency screw-filter of the present utility model, comprise metallic shield cavity and the top cover of assembling with shielding cavity, be provided with the coupling dividing plate in the described cavity, described coupling dividing plate is separated into a plurality of resonant cavitys with shielding cavity, be provided with helical resonator in described each resonant cavity, wherein said helical resonator comprises medium skeleton and the spiral resonance coil that is supported by the medium skeleton, described medium skeleton is provided with helical groove, described spiral resonance coil is contained in the groove, can prevent that the spiral resonance coil from rocking under the low frequency operation environment, solved like this owing to rocking the problem that causes frequency change, improved the job stability of filter.
[description of drawings]
Fig. 1 is the perspective view of the utility model low frequency screw-filter;
Fig. 2 is the blast structural representation of the utility model low frequency screw-filter;
Fig. 3 is the helical resonator blast structural representation of the utility model low frequency screw-filter.
[embodiment]
Describe concrete structure of the present utility model in detail below in conjunction with accompanying drawing.
Shown in ginseng Fig. 1,2, be novel low-frequency filter 100 of the present utility model, comprise metallic shield cavity 120 and the top cover 110 of assembling with shielding cavity 120, the two ends of described shielding cavity 120 are provided with interface socket 140; Described shielding cavity 120 and top cover 110 adopt the metal materials such as brass, stainless steel or aluminium alloy to make, and its inner surface can be provided with silver coating.Described shielding cavity 120 is provided with coupling dividing plate 150, and described coupling dividing plate 150 is separated into a plurality of resonant cavitys with shielding cavity 120, is separated in the present embodiment six resonant cavitys 151, and quantity is not limited in six; Described resonant cavity 151 two two adjacent settings are two row, three row and arrange, and described resonant cavity 151 all is one-time formed side's cavity configurations.Be provided with helical resonator 130 in described each resonant cavity 151, the quantity of helical resonator 130 also should be six mutually.Be installed on the tuning bolt 160 of adjustable setting on the described protecgulum 110 corresponding to the position of helical resonator 130, protecgulum 110 is provided with a plurality of tuned windows 111, and tuning bolt 160 is installed in the tuned window 111.Be installed on screwed hole 121 on the sidewall of shielding cavity 120, protecgulum 110 inserts in the screwed hole 121 by screw and assembles with shielding cavity 120.
Referring to shown in Figure 3, described helical resonator 130 comprises medium skeleton 132 and the spiral resonance coil 131 that is supported by medium skeleton 132 again, and described medium skeleton 132 is provided with helical groove 1322, and described spiral resonance coil 131 is contained in the groove 1322.Described spiral resonance coil 131 is wrapped on the groove 1322 of medium skeleton 132 in the present embodiment.When screw-filter in the low frequency operational environment, owing to having adopted the helical coil 131 of steel and the medium skeleton 132 of polytetrafluoroethylene material, the coefficient of expansion of steel helical coil 131 under high temperature and low temperature is very low, and frequency drift seldom is conducive to the raising of performance; And steel helical coil 131 is a lot of owing to the very low number of turn that causes of frequency, is fixed in and prevents rocking of itself in the groove 1322, will rock like this to cause the problem of frequency change to obtain solution, has improved the job stability of filter.
More optimize, described medium skeleton 132 is provided with vertical slot to make way 1321 away from an end of protecgulum, and an end 1311 of described spiral resonance coil 131 is contained in the described slot to make way 1321.
Because described spiral resonance coil 131 in the shape of a spiral, electromagnetic wave must transmit successively along each circle of coil, will greatly reduce the length of resonator, and this is the volume of Optimal Filter greatly also.Low-frequency filter of the present utility model is inner to be formed with the milling cutter time processing, avoids electromagnetic-wave leakage, and what the appropriate design of structure was conducive to make is simple and convenient.
The above only is better embodiment of the present utility model; protection range of the present utility model is not limited with above-mentioned execution mode; as long as the equivalence that those of ordinary skills do according to the utility model institute disclosure is modified or changed, all should include in the protection range of putting down in writing in claims.
Claims (8)
1. novel low-frequency screw-filter, comprise metallic shield cavity and the top cover of assembling with shielding cavity, be provided with the coupling dividing plate in the described shielding cavity, described coupling dividing plate is separated into a plurality of resonant cavitys with shielding cavity, be provided with helical resonator in described each resonant cavity, it is characterized in that: described helical resonator comprises medium skeleton and the spiral resonance coil that is supported by the medium skeleton, and described medium skeleton is provided with helical groove, and described spiral resonance coil is contained in the groove.
2. novel low-frequency screw-filter according to claim 1, it is characterized in that: described spiral resonance coil is spirally wound on the medium skeleton.
3. novel low-frequency screw-filter according to claim 1 is characterized in that: the tuning bolt that is installed on adjustable setting on the described protecgulum corresponding to the position of helical resonator.
4. according to claim 1 or 3 described novel low-frequency screw-filters, it is characterized in that: the quantity of described resonant cavity is six, two two adjacent settings, and described resonant cavity all is one-time formed side's cavity configurations.
5. novel low-frequency screw-filter according to claim 4, it is characterized in that: the quantity of described helical resonator is six.
6. novel low-frequency screw-filter according to claim 1 is characterized in that: described medium skeleton adopts poly-four Buddhist vinyl materials to make.
7. according to claim 1 or 6 described novel low-frequency screw-filters, it is characterized in that: described spiral resonance coil is that stainless steel material is made.
8. novel low-frequency screw-filter according to claim 7, it is characterized in that: described medium skeleton is provided with vertical slot to make way away from an end of protecgulum, and an end of described spiral resonance coil is contained in the described slot to make way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652659 CN203242726U (en) | 2012-11-30 | 2012-11-30 | Novel low-frequency helical filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220652659 CN203242726U (en) | 2012-11-30 | 2012-11-30 | Novel low-frequency helical filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203242726U true CN203242726U (en) | 2013-10-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220652659 Expired - Fee Related CN203242726U (en) | 2012-11-30 | 2012-11-30 | Novel low-frequency helical filter |
Country Status (1)
| Country | Link |
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| CN (1) | CN203242726U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457008A (en) * | 2013-08-31 | 2013-12-18 | 西安电子科技大学 | Filter with back cavity resonators |
| CN107104256A (en) * | 2017-06-20 | 2017-08-29 | 南京华德通信技术有限公司 | A kind of screw-filter and its design method |
| CN108365325A (en) * | 2017-12-28 | 2018-08-03 | 中国电子科技集团公司第二十研究所 | A kind of low frequency navigation miniaturization magnetic array |
-
2012
- 2012-11-30 CN CN 201220652659 patent/CN203242726U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103457008A (en) * | 2013-08-31 | 2013-12-18 | 西安电子科技大学 | Filter with back cavity resonators |
| CN103457008B (en) * | 2013-08-31 | 2016-03-02 | 西安电子科技大学 | A kind of filter with back of the body chamber resonator |
| CN107104256A (en) * | 2017-06-20 | 2017-08-29 | 南京华德通信技术有限公司 | A kind of screw-filter and its design method |
| CN108365325A (en) * | 2017-12-28 | 2018-08-03 | 中国电子科技集团公司第二十研究所 | A kind of low frequency navigation miniaturization magnetic array |
| CN108365325B (en) * | 2017-12-28 | 2020-02-07 | 中国电子科技集团公司第二十研究所 | Low-frequency navigation miniaturized magnetic array |
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| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Hango Technology Co., Ltd. Document name: Notification to Go Through Formalities of Registration |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Hango Technology Co., Ltd. Document name: Notification to Pay the Fees |
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| DD01 | Delivery of document by public notice |
Addressee: Shenzhen Hango Technology Co., Ltd. Document name: Notification of Termination of Patent Right |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131016 Termination date: 20141130 |
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| EXPY | Termination of patent right or utility model |