CN203103473U - Metal cavity microwave band-pass filter for audio near field payment - Google Patents
Metal cavity microwave band-pass filter for audio near field payment Download PDFInfo
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- CN203103473U CN203103473U CN 201320066308 CN201320066308U CN203103473U CN 203103473 U CN203103473 U CN 203103473U CN 201320066308 CN201320066308 CN 201320066308 CN 201320066308 U CN201320066308 U CN 201320066308U CN 203103473 U CN203103473 U CN 203103473U
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- pass filter
- resonator
- near field
- cylindrical metal
- microwave band
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Abstract
The utility model discloses a metal cavity microwave band-pass filter for audio near field payment. The metal cavity microwave band-pass filter comprises a cylindrical metal shell, two input ends, two output ends and a resonator, wherein each input end is internally connected with a tuning medium body, each output end is internally connected with a probe, two ends of the cylindrical metal shell are respectively provided with a metal end cover, the resonator is arranged inside a through hole of the cylindrical metal shell and concentric with the through hole, and two ends of the resonator are respectively connected with the metal end cover; and a medium drum, which is internally filled with a medium material, is arranged inside the cylindrical metal shell, the resonator is arranged inside the medium drum, and two ends of the medium drum are respectively provided with a medium cover. By virtue of the medium drum, the band-pass filter is free from parasitic mode response in octave and has better temperature stability; and the band-pass filter also has the advantages of small size, simple structure, convenience in machining and low cost.
Description
Technical field
The utility model relates to a kind of wire chamber microwave band-pass filter, relates in particular to a kind of wire chamber microwave band-pass filter that is used for the payment of audio frequency near field.
Background technology
Audio frequency near field payment technology be the applicant's a kind of utilization of proposing and applying for a patent closely audio transmission information to finish the technology of payment function, its audio frequency R-T unit that utilizes conventional equipment such as mobile phone to carry is realized payment, has the advantage that payment is quick, easily implement, easily popularize.In the payment technology of audio frequency near field, in the sending and receiving process of audio frequency, all need use band pass filter, the band pass filter that all adopts integrated electronic component to constitute generally speaking, but some environment abominable as the extremely low situation of temperature under, need use the wire chamber microwave band-pass filter, so that it has good temperature stability.Traditional wire chamber microwave band-pass filter complex structure, big, the processing inconvenience of volume, manufacturing cost is higher, is that its application in the payment technology of audio frequency near field is restricted.
Summary of the invention
The purpose of this utility model just is to provide in order to address the above problem a kind of simple in structure, wire chamber microwave band-pass filter that is used for the payment of audio frequency near field that volume is little.
The utility model is achieved through the following technical solutions above-mentioned purpose:
The wire chamber microwave band-pass filter that is used for the payment of audio frequency near field described in the utility model, comprise cylindrical metal housing, input, output resonator, described input is two, the inner of each described input is connected with a tuning dielectric, described output is two, the inner of each described output is connected with a probe, the two ends of described cylindrical metal housing are provided with metal end, described resonator places the interior and concentric of the through hole of described cylindrical metal housing, and the two ends of described resonator are connected with described metal end respectively; Be provided with the medium tube of inner filled media material in the described cylindrical metal housing, described resonator places in the described medium tube, and the two ends of described medium tube are provided with dielectric cap.
Further, the inner surface of described medium tube and described dielectric cap is silver coated.
As preferably, described dielectric material is a ceramic powders.
The beneficial effects of the utility model are:
By increasing the medium tube, make band pass filter described in the utility model no parasitic mode response in octave, have better temperature stability; Band pass filter described in the utility model also has volume advantage little, simple in structure, easy to process, with low cost.
Description of drawings
Fig. 1 is the sectional structure schematic diagram of wire chamber microwave band-pass filter described in the utility model;
Fig. 2 is the system architecture diagram of the utility model sound intermediate frequency near field payment system;
Fig. 3 is the circuit structure block diagram of the voice frequency sender of the utility model sound intermediate frequency near field payment system;
Fig. 4 is the circuit structure block diagram of the audio receiver of the utility model sound intermediate frequency near field payment system.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
As Fig. 2, Fig. 3 and shown in Figure 4, audio frequency near field payment system in the payment technology of audio frequency near field comprise a plurality of (having illustrated 4 among Fig. 2) can be mutually voice frequency terminal by voice communication, this voice frequency terminal can be portable terminals such as mobile phone, also can be fixed terminals such as payment platform.Each voice frequency terminal all comprises voice frequency sender and audio receiver, voice frequency sender comprises encoder for convolution codes, modulator, band pass filter, D/A change-over circuit, amplifirer and the loud speaker of series connection successively, the input input Applied Digital data-signal of encoder for convolution codes, the loud speaker output sound signal is used for the information medium as the near field payment; Audio receiver comprises microphone, A/D change-over circuit, band pass filter, demodulator, low pass filter and the convolutional code decoder device of series connection successively, the voice signal that the input input of microphone is transmitted by loud speaker, the output output Applied Digital data-signal of convolutional code decoder device.
As shown in Figure 1, above-mentioned band pass filter comprises cylindrical metal housing 4, input 3, output 9 resonator 5, input 3 is two, the inner of each input 3 is connected with a tuning dielectric 2, output 9 is two, the inner of each output 9 is connected with a probe 8, the two ends of cylindrical metal housing 4 are provided with metal end 1, be provided with the medium tube 6 of inner filled media material in the through hole of cylindrical metal housing 4, resonator 5 places in the medium tube 6, the two ends of medium tube 6 are provided with dielectric cap 7, resonator 5 and cylindrical metal housing 1 and medium tube 6 equal concentrics, and the two ends of resonator 5 are connected with metal end 1 respectively.The silver coated (not shown) of inner surface of above-mentioned medium tube 6 and dielectric cap 7, above-mentioned dielectric material is a ceramic powders.
As shown in Figure 1,, make band pass filter described in the utility model no parasitic mode response in octave, have better temperature stability by increasing medium tube 6; Rotation tuning dielectric 2, can change and resonator 5 between distance, thereby the purpose of frequency tuning.
Claims (3)
1. one kind is used for the wire chamber microwave band-pass filter that pay in the audio frequency near field, comprise cylindrical metal housing, input, output resonator, described input is two, the inner of each described input is connected with a tuning dielectric, described output is two, the inner of each described output is connected with a probe, the two ends of described cylindrical metal housing are provided with metal end, described resonator places the interior and concentric of the through hole of described cylindrical metal housing, and the two ends of described resonator are connected with described metal end respectively; It is characterized in that: be provided with the medium tube of inner filled media material in the described cylindrical metal housing, described resonator places in the described medium tube, and the two ends of described medium tube are provided with dielectric cap.
2. the wire chamber microwave band-pass filter that is used for the payment of audio frequency near field according to claim 1, it is characterized in that: the inner surface of described medium tube and described dielectric cap is silver coated.
3. the wire chamber microwave band-pass filter that is used for the payment of audio frequency near field according to claim 1, it is characterized in that: described dielectric material is a ceramic powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066308 CN203103473U (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field payment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320066308 CN203103473U (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field payment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203103473U true CN203103473U (en) | 2013-07-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320066308 Expired - Fee Related CN203103473U (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field payment |
Country Status (1)
| Country | Link |
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| CN (1) | CN203103473U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972620A (en) * | 2013-02-05 | 2014-08-06 | 成都摩宝网络科技有限公司 | Metal cavity microwave band-pass filter for audio near field communication |
-
2013
- 2013-02-05 CN CN 201320066308 patent/CN203103473U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103972620A (en) * | 2013-02-05 | 2014-08-06 | 成都摩宝网络科技有限公司 | Metal cavity microwave band-pass filter for audio near field communication |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130731 Termination date: 20140205 |