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Multi-mode multi-frequency band radio frequency front end air-borne communication system

A multi-mode, multi-band, RF front-end technology, applied in the transmission system, radio transmission system, electrical components, etc., can solve the problems of aircraft flight impact, no application working environment, etc.

Inactive Publication Date: 2009-08-12
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Defects and deficiencies in the prior art: as we all know, many civil radio communication equipment must be turned off on the plane, because many of its operating frequency bands overlap with the navigation system frequency band of the aircraft, so these communication equipment are prohibited from being used, so as not to cause damage to the aircraft. impact on the flight of the aircraft
However, the current radio frequency system is still not used in the special working environment of aircraft navigation.

Method used

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  • Multi-mode multi-frequency band radio frequency front end air-borne communication system

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Embodiment Construction

[0023] Below in conjunction with accompanying drawing, the technical scheme of invention is described in detail:

[0024] Such as figure 1 As shown, the multi-mode multi-band RF front-end airborne communication system of the present invention is characterized in that it includes a receiving module, a local oscillator module and a transmitting module, wherein the receiving module is composed of a first low-noise amplifier, a demodulator, a first variable gain amplifier , a first filter, a second variable gain amplifier, a second filter and an operational amplifier in series; the local oscillator module consists of a frequency synthesizer, a first switch, a second low-noise amplifier, a second switch, and a third low-noise An amplifier, a frequency multiplier, a fourth low-noise amplifier, and a third switch are sequentially connected in series, the second switch is electrically connected to the third switch, and the input end of the third switch is connected to the output end o...

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Abstract

The invention discloses a multi-mode multi-band radiofrequency front-end on-board communication system, which comprises a receiving module, a local oscillation module and a transmitting module. A radiofrequency subsystem has wide working frequency band which is between 400MHz and 6GHz, and can support different wireless network services in special environment such as airplane navigation and the like, and communication systems such as 2G, 3G, WLAN, bluetooth and the like. The channel bandwidth changes with the difference of operation modes, wherein the maximum bandwidth can reach 20MHz, the maximum radiofrequency output power is 20dBm, and the noise coefficient of a receiver is less than 9dB.

Description

technical field [0001] The invention relates to a multi-mode multi-band radio frequency front-end airborne communication system, which belongs to the technical field of a radio frequency front-end subsystem applicable to current wireless communication services. Background technique [0002] With the continuous development of wireless communication technology and the increasing social demand, wireless communication including mobile phone, wireless paging, satellite communication, etc. has been popularized and applied more and more widely, and has shown a broad market prospect. From a global perspective, the annual increase and growth rate of wireless communication users continue to increase significantly year by year, and wireless communication has entered a stage of large-scale development. The RF front-end subsystem is an important part of the wireless communication transceiver system. It generally functions to down-convert the received RF signal to an intermediate frequenc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B1/40H04B7/185
Inventor 周健义王彦炜洪伟
Owner SOUTHEAST UNIV
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