Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Method and device for generating audio modulation THz wave

An audio modulation and audio signal technology, applied in the application field of semiconductor optoelectronic devices, can solve problems such as limited data transmission capacity, and achieve the effects of small size, high energy conversion efficiency, and easy integration

Active Publication Date: 2012-03-28
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to meet the increasing demand for bandwidth, one of the methods is to increase the frequency band utilization by adopting more advanced modulation techniques, and increase the channel capacity by adopting multiple multiplexing methods, but Shannon's theorem tells us that the data transmission provided by this method capacity is still limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method and device for generating audio modulation THz wave
  • Method and device for generating audio modulation THz wave
  • Method and device for generating audio modulation THz wave

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The method and device for generating audio-modulated THz waves of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] The inventor of the present invention proposes a method for generating audio-modulated THz waves based on a terahertz quantum cascade laser after in-depth research on terahertz devices. Such as figure 1 As shown, the method uses a THz QCL as a radiation source, modulates its intensity, and loads an audio signal onto the THz wave. Specifically, such as figure 2 As shown, the input audio signal is amplified, then superimposed with a DC bias voltage signal, and then the superimposed voltage signal is amplified by a power amplifier (PA), and the amplified voltage signal is used as a modulation signal to drive THzQCL to generate modulation THz waves.

[0027] Among them, the modulated signal needs to be output by a high-power amplifier to meet the larger working power requirements of THzQCL. Prefe...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method and device for generating an audio modulation THz wave, applicable to THz communication application in the future. In the method, a THz quantum cascade laser is taken as a radiation source, intensity modulation is carried out on the THz quantum cascade laser, and an audio signal is loaded onto the THz wave. The device comprises the THz quantum cascade laser taken as the radiation source and a modulation circuit thereof, wherein the modulation circuit comprises an audio signal amplifying circuit, an audio signal and direct current bias signal superposing circuit and a superposed signal power amplifying circuit. By adopting the method and device disclosed by the invention, a modulation THz wave in a frequency band of 2-7THz can be generated, wherein the frequency band is not allocated or applied at present; and the adopted THz quantum cascade laser has high energy conversion efficiency, a small volume and easiness in integration and can be produced in a large scale.

Description

technical field [0001] The invention relates to a method and device for generating audio frequency modulated THz waves, in particular to an analog intensity modulation method for THz quantum cascade lasers. The invention belongs to the application technical field of semiconductor photoelectric devices. Background technique [0002] According to Edholm's bandwidth law, in the past 25 years, the bandwidth demand of short-distance wireless communication systems has doubled every 18 months. In order to meet the increasing demand for bandwidth, one of the methods is to increase the frequency band utilization by adopting more advanced modulation techniques, and increase the channel capacity by adopting multiple multiplexing methods, but Shannon's theorem tells us that the data transmission provided by this method Ability is still limited. In order to provide sufficient bandwidth, people need to adopt a higher carrier frequency, which extends to the THz frequency band (0.1-10THz)...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): H04L27/04H01S1/02
Inventor 曹俊诚陈镇谭智勇韩英军
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com