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Microwave emission frequency variation method and emission device for marine environment satellite altimeter

A microwave emission and environmental satellite technology, applied in the aerospace microwave field, can solve problems such as linearity deterioration, large harmonic noise, and affecting circuit signal-to-noise ratio, so as to reduce frequency multiplication times, simplify the whole machine circuit, and improve linearity Effect

Inactive Publication Date: 2014-06-18
NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is often necessary to use multiple frequency multipliers to increase the linear FM signal to the required band, which will generate a large amount of harmonic noise, which will affect the signal-to-noise ratio of the circuit and also make the linearity worse.

Method used

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  • Microwave emission frequency variation method and emission device for marine environment satellite altimeter

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Embodiment Construction

[0014] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention Modifications in equivalent forms all fall within the scope defined by the appended claims of this application.

[0015] The altimeter of the marine environmental satellite radar transmits a chirp signal of 250MHz±40MHz through the Ku and C bands, and the chirp signal is also the modulation signal in the present invention. Such as figure 1 As shown, the modulated signal is first input into the amplifying and mixing unit one. The amplifying and mixing unit one is composed of an intermediate frequency amplifier 2 , a first power divider 3 , an attenuator 4 , a first mixer 5 and a fir...

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Abstract

The invention discloses a microwave emission frequency variation method and an emission device for a marine environment satellite altimeter. The device comprises an amplification and frequency mixing unit I for inputting a modulation signal, and a frequency doubling unit for performing frequency doubling on a signal I which is subjected to frequency mixing and is output by the amplification and frequency mixing unit I, wherein the signal subjected to frequency doubling is connected to an amplification and frequency mixing unit II through one path of a power divider; the other path of the power divider outputs a Ku waveband signal; the amplification and frequency mixing unit II performs frequency mixing amplification and coupling detection on the signal subjected to frequency doubling and then outputs a C waveband signal. The frequency variation method adopts a frequency variation and frequency doubling mode, so that the number of times of frequency doubling is reduced, and the linearity is improved.

Description

technical field [0001] The invention relates to a microwave transmitting frequency conversion method and a transmitting device for a marine environment satellite altimeter, belonging to the field of aerospace microwaves. Background technique [0002] Marine environmental satellites use low power consumption and low delay distortion satellites to use microwave transmission frequency conversion components to generate Ku and C dual-band signals (signal bandwidth ±160MHz) after multiplying the 250MHz±40MHz chirp signal multiple times, which is the Ku of the satellite radar altimeter , The C-band power amplifier unit provides the transmitting signal, and provides the de-slope local oscillator signal for the Ku and C-band receiving units. [0003] The existing frequency conversion method mainly adopts multiple frequency doubling to increase the frequency of the linear frequency modulation signal to Ku and C bands. As we all know, the frequency multiplier uses the distortion of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03D7/16
Inventor 吴刚罗运生周明
Owner NO 55 INST CHINA ELECTRONIC SCI & TECHNOLOGYGROUP CO LTD
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