An l-band narrow-band electronic radiosonde

Abstract

The invention relates to the field of high-altitude meteorological detection, in particular to an L-band narrow-band electronic radiosonde, which is characterized in that it includes a sensor module, a receiving module and a transmitting module; the transmitting module includes a single-chip microcomputer control system, a multifunctional radio frequency module, a filter, Two-stage microwave switch, two-stage high-amplifier and one-stage power amplifier; the sounding data of the sensor module and the pulse signal emitted by the receiving module are input to the single-chip control system; the single-chip control system adopts a time-sharing working mode, which divides the unit time into three time periods , respectively output sounding code signal, ranging signal and angle measuring signal, and the signal characteristics are frequency modulation signal, pulse modulation signal and continuous wave signal respectively. The present invention adopts the mixed system of frequency modulation and amplitude modulation to solve the shortcoming that the radiosonde of the current amplitude modulation system occupies the frequency bandwidth, and the radiosonde of the frequency modulation system cannot measure the distance, and satisfies the requirement of bandwidth occupied by the meteorological frequency spectrum resources; Same frequency interference, stable and reliable.

Description

technical field [0001] The invention relates to the field of high-altitude meteorological detection, in particular to an L-band narrow-band electronic radiosonde. Background technique [0002] The high-altitude meteorological detection radar system is one of the most important means of conventional atmospheric detection at present. Conventional high-altitude meteorological detection refers to the observation of changes in space meteorological elements from the surface of the earth to the height of tens of thousands of meters by the radiosonde carried by the radar tracking balloon. The activities and work processes of detection, collection and processing. The radiosonde is an important part of the upper-air meteorological detection system. [0003] At present, the stations of China Meteorological Department use radiosondes with amplitude modulation system. This radiosonde occupies a wide frequency band, which cannot meet the requirements of use in today's increasingly tense...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a kind of L-band narrow-band electronic radiosonde, adopt frequency modulation, amplitude modulation mixed system to solve the shortcoming that current amplitude modulation system radiosonde occupies the frequency bandwidth, and frequency modulation system radiosonde cannot measure distance, and satisfies the meteorological frequency band Spectrum resource occupation bandwidth requirements; using time-division working mode to solve the same-channel interference, stable and reliable

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