Image frequency rejection frequency mixer structure for terahertz wave band

A technology of image frequency suppression and mixer, which is applied in the field of terahertz devices, can solve the problems of high filter center frequency, increase the difficulty of filter design, and narrow bandwidth, and achieve the effects of reducing demand, small loss, and reducing processing costs

Active Publication Date: 2016-03-09
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF3 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The suppression of the image frequency usually adopts the method of adding an image frequency suppression filter at the input end of the mixer. However, in the terahertz frequency band, the frequency of the radio frequency signal i

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
  • Image frequency rejection frequency mixer structure for terahertz wave band
  • Image frequency rejection frequency mixer structure for terahertz wave band
  • Image frequency rejection frequency mixer structure for terahertz wave band

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0024] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0025] figure 1 It is a schematic diagram of the image frequency suppression mixer of the present invention, and the image frequency is suppressed by using the balance of the amplitude and phase of the two-way frequency mixing. Among them, the RF signal is input to the two mixers with equal amplitude and 90-degree phase difference, the local oscillator signal is input to the two mixers with equal amplitude and phase difference, and the intermediate frequency of the two intermediate frequency output terminals is combined and output by the 90-degree combiner. inverse cancellation. figure 2 , ima...

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 belongs to the technical field of terahertz devices, and provides an image frequency rejection frequency mixer structure for a terahertz wave band. The image frequency rejection frequency mixer structure includes an E-plane rectangular waveguide Chinese character 'tian'-shaped branch wire bridge 3dB directional coupler, micro-strip waveguide double probes, two frequency mixers, and a power combiner. A radio-frequency signal can generate two-channel radio-frequency signals with an equal amplitude and a 90-dgress phase difference via the E-plane rectangular waveguide Chinese character 'tian'-shaped branch wire bridge 3dB directional coupler, and the two-channel radio-frequency signals are input into two-channel frequency mixers respectively; a local oscillation signal can generate two-channel signals with an equal amplitude and a same phase via micro-strip waveguide double probes, and the two way signals are input into the two-channel frequency mixers respectively; two-channel frequency mixer intermediate frequency output signals are combined via the power combiner, and then are output; and each input end of the power combiner is provided with a 90-deree phase shifter for allowing the corresponding frequency mixer intermediate frequency output signal to generate a 90-degree phase shift, so that the two-channel frequency mixer intermediate frequency output signals are stacked in phase and output. The image frequency rejection frequency mixer structure is simple in structure and is applied to the terahertz wave band.

Description

technical field [0001] The invention belongs to the technical field of terahertz devices, and relates to an image frequency suppression mixer, in particular to an image frequency suppression mixer structure applicable to the terahertz band. Background technique [0002] THz waves refer to electromagnetic waves with a frequency in the range of 0.1-10THz (wavelength 0.03mm-3mm). Its long-wave band coincides with microwave and millimeter waves, and its short-wave band coincides with infrared rays. Its special position in the electromagnetic wave spectrum determines It combines some of the advantages of microwave and millimeter waves and light waves, that is, the advantages of stronger directionality of wave speed, higher resolution, and larger information capacity. Therefore, terahertz waves are widely used in many fields such as radar communication, object imaging, and environmental monitoring. [0003] In application systems such as terahertz communication, radar, and electr...

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): H01P1/213H01P1/212H03D7/16
Inventor 张勇屈晓敏陈忠飞艾才杰肖筑文徐锐敏延波
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap