CN103972620A - Metal cavity microwave band-pass filter for audio near field communication - Google Patents
Metal cavity microwave band-pass filter for audio near field communication Download PDFInfo
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- CN103972620A CN103972620A CN201310045076.1A CN201310045076A CN103972620A CN 103972620 A CN103972620 A CN 103972620A CN 201310045076 A CN201310045076 A CN 201310045076A CN 103972620 A CN103972620 A CN 103972620A
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- pass filter
- resonator
- near field
- dielectric
- cylindrical metal
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Abstract
The invention discloses a metal cavity microwave band-pass filter for audio near field communication. The band-pass filter comprises a cylindrical metal shell, two input ends, two output ends and a resonator, each input end is internally connected with a tuning dielectric, each output end is internally connected with a probe, metal end caps are arranged at two ends of the cylindrical metal shell, the resonator is arranged in a through hole of the cylindrical metal shell coaxially, two ends of the resonator are connected with the metal end caps respectively, a dielectric cylinder filled with a dielectric material inside is arranged in the cylindrical metal shell, the resonator is arranged in the dielectric cylinder, and dielectric caps are arranged at two ends of the dielectric cylinder. Through the added dielectric cylinder, the band-pass filter has no parasitic mode response in octave and has better temperature stability; moreover, the band-pass filter further has the advantages of small size, simple structure, convenience in processing and low cost.
Description
Technical field
The present invention relates to a kind of wire chamber microwave band-pass filter, relate in particular to a kind of wire chamber microwave band-pass filter paying for 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 complete the technology of payment function, it utilizes the audio frequency R-T unit realization that the conventional equipments such as mobile phone carry to pay, and has advantages of and pays quick, easily enforcement, easily universal.In the payment technology of audio frequency near field, in the sending and receiving process of audio frequency, all need to use band pass filter, the band pass filter that generally all adopts integrated electronic component to form, but in the situation that some environment is severe as extremely low in temperature, need to use wire chamber microwave band-pass filter, to make it have good temperature stability.Traditional wire chamber microwave band-pass filter complex structure, volume is large, processing is inconvenient, and manufacturing cost is higher, is that its application in the payment technology of audio frequency near field is restricted.
Summary of the invention
Object of the present invention is just to provide in order to address the above problem a kind of simple in structure, wire chamber microwave band-pass filter paying for audio frequency near field that volume is little.
The present invention is achieved through the following technical solutions above-mentioned purpose:
The wire chamber microwave band-pass filter paying for audio frequency near field of the present invention, comprise cylindrical metal housing, input, output resonator, described input is two, described in each, the inner of input is connected with a tuning dielectric, described output is two, described in each, the inner of output is connected with a probe, the two ends of described cylindrical metal housing arrange metal end, described resonator is placed in the interior also concentric of through hole of described cylindrical metal housing, and the two ends of described resonator are connected with described metal end respectively; In described cylindrical metal housing, be provided with the medium cylinder of inner filled media material, described resonator is placed in described medium cylinder, and the two ends of described medium cylinder are provided with dielectric cap.
Further, the inner surface of described medium cylinder and described dielectric cap is silver coated.
As preferably, described dielectric material is ceramic powders.
Beneficial effect of the present invention is:
By increasing medium cylinder, band pass filter of the present invention is responded without parasitic mode in octave, there is better temperature stability; Band pass filter of the present invention also has advantages of that volume is little, simple in structure, easy to process, with low cost.
Brief description of the drawings
Fig. 1 is the sectional structure schematic diagram of wire chamber microwave band-pass filter of the present invention;
Fig. 2 is the system architecture diagram of sound intermediate frequency of the present invention near field payment system;
Fig. 3 is the circuit structure block diagram of the voice frequency sender of sound intermediate frequency of the present invention near field payment system;
Fig. 4 is the circuit structure block diagram of the audio receiver of sound intermediate frequency of the present invention near field payment system.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described:
As shown in Figure 2, Figure 3 and Figure 4, audio frequency near field payment system in the payment technology of audio frequency near field comprises that multiple (in Fig. 2, having illustrated 4) can be mutually by the voice frequency terminal of voice communication, this voice frequency terminal can be the mobile terminals such as mobile phone, can be also the fixed terminals such as payment platform.Each voice frequency terminal 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 information medium of loud speaker output sound signal for paying as near field; 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 of the 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 arrange metal end 1, in the through hole of cylindrical metal housing 4, be provided with the medium cylinder 6 of inner filled media material, resonator 5 is placed in medium cylinder 6, the two ends of medium cylinder 6 are provided with dielectric cap 7, resonator 5 and cylindrical metal housing 1 and the equal concentric of medium cylinder 6, 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 cylinder 6 and dielectric cap 7, above-mentioned dielectric material is ceramic powders.
As shown in Figure 1, by increasing medium cylinder 6, band pass filter of the present invention is responded in octave without parasitic mode, there is better temperature stability; Rotation tuning dielectric 2, can change the distance between resonator 5, thus the object of frequency tuning.
Claims (3)
1. the wire chamber microwave band-pass filter paying for audio frequency near field, comprise cylindrical metal housing, input, output resonator, described input is two, described in each, the inner of input is connected with a tuning dielectric, described output is two, described in each, the inner of output is connected with a probe, the two ends of described cylindrical metal housing arrange metal end, described resonator is placed in the interior also concentric of 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: in described cylindrical metal housing, be provided with the medium cylinder of inner filled media material, described resonator is placed in described medium cylinder, and the two ends of described medium cylinder are provided with dielectric cap.
2. the wire chamber microwave band-pass filter paying for audio frequency near field according to claim 1, is characterized in that: the inner surface of described medium cylinder and described dielectric cap is silver coated.
3. the wire chamber microwave band-pass filter paying for audio frequency near field according to claim 1, is characterized in that: described dielectric material is ceramic powders.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310045076.1A CN103972620A (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310045076.1A CN103972620A (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field communication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103972620A true CN103972620A (en) | 2014-08-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310045076.1A Pending CN103972620A (en) | 2013-02-05 | 2013-02-05 | Metal cavity microwave band-pass filter for audio near field communication |
Country Status (1)
| Country | Link |
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| CN (1) | CN103972620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799398A (en) * | 2018-11-30 | 2019-05-24 | 无锡市好达电子有限公司 | A kind of filter probe test method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113557U (en) * | 1992-03-13 | 1992-08-19 | 东南大学 | High stable microwave strip-pass filter |
| JP2007028139A (en) * | 2005-07-15 | 2007-02-01 | Toko Inc | Manufacturing method of dielectric resonator and filter |
| CN203103473U (en) * | 2013-02-05 | 2013-07-31 | 成都摩宝网络科技有限公司 | Metal cavity microwave band-pass filter for audio near field payment |
-
2013
- 2013-02-05 CN CN201310045076.1A patent/CN103972620A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2113557U (en) * | 1992-03-13 | 1992-08-19 | 东南大学 | High stable microwave strip-pass filter |
| JP2007028139A (en) * | 2005-07-15 | 2007-02-01 | Toko Inc | Manufacturing method of dielectric resonator and filter |
| CN203103473U (en) * | 2013-02-05 | 2013-07-31 | 成都摩宝网络科技有限公司 | Metal cavity microwave band-pass filter for audio near field payment |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109799398A (en) * | 2018-11-30 | 2019-05-24 | 无锡市好达电子有限公司 | A kind of filter probe test method |
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Application publication date: 20140806 |