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Metal cavity microwave band-pass filter for audio near field communication

A near-field payment, metal cavity technology, applied to waveguide-type devices, electrical components, circuits, etc., can solve the problems of high manufacturing cost, inconvenient processing, complex structure, etc., and achieve the effect of low cost, simple structure and small volume

Inactive Publication Date: 2014-08-06
CHENGDU MOBO NETWORK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional metal cavity microwave bandpass filter has complex structure, large volume, inconvenient processing, and high manufacturing cost, which limits its application in audio near-field payment technology

Method used

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  • Metal cavity microwave band-pass filter for audio near field communication
  • Metal cavity microwave band-pass filter for audio near field communication
  • Metal cavity microwave band-pass filter for audio near field communication

Examples

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with accompanying drawing:

[0015] Such as figure 2 , image 3 and Figure 4 As shown, the audio near-field payment system in the audio near-field payment technology includes multiple ( figure 2 4 are shown in ) audio terminals capable of communicating with each other through sound. The audio terminals may be mobile terminals such as mobile phones, or fixed terminals such as payment platforms. Each audio terminal includes an audio transmitter and an audio receiver. The audio transmitter includes a convolutional code encoder, a modulator, a bandpass filter, a D / A conversion circuit, a power amplifier, and a loudspeaker that are sequentially connected in series. The convolutional code code The input terminal of the device inputs the digital data signal, and the speaker outputs the sound signal as an information medium for near-field payment; the audio receiver includes a series-connected microphone...

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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 [0001] The invention relates to a metal cavity microwave bandpass filter, in particular to a metal cavity microwave bandpass filter for audio near-field payments. Background technique [0002] The audio near-field payment technology is proposed by the applicant and applied for a patent, which uses short-distance audio transmission information to complete the payment function. It uses the audio transceiver device that comes with conventional equipment such as mobile phones to realize payment, and has the advantages of fast payment and easy implementation. , Easy to popularize the advantages. In the audio near-field payment technology, band-pass filters are required in the process of audio receiving and sending. Generally, band-pass filters composed of integrated electronic components are used, but in some harsh environments such as extreme temperatures In the low case, a metal cavity microwave bandpass filter is required to have good temperature stability. T...

Claims

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Application Information

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IPC IPC(8): H01P1/205
Inventor 唐皓
Owner CHENGDU MOBO NETWORK TECH
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