FM broadcasting transmitter with temperature reduction and noise reduction function

Abstract

The invention provides an FM broadcasting transmitter with a temperature reduction and noise reduction function. A heat dissipation device comprises a grille radiator, a water cooling tube and a watercooling box, wherein the water cooling box is located in a casing, both ends of the water cooling tube extend into the water cooling box, the water cooling box is provided therein with a water pump connected to the end portion of the water cooling tube, the grille radiator comprises a square heat-conducting plate and a plurality of elongated fins fixed on the heat-conducting plate, the heat-conducting plate is closely attached to a circuit board, vent holes are formed in the middle of the heat-conducting plate, the water cooling tube comprises an S-shaped heat-dissipating section and a cylindrical expansion section, the S-shaped heat-dissipating section is wound around the fins, the expansion section passes through the vent holes, a vacuum noise reduction device wraps a signal transmitting device. The FM broadcasting transmitter uses the water cooling tube and the water cooling box to absorb the heat of the circuit board, so that internal equipment cannot burnt out due to high temperature, and the vacuum noise reduction device achieves a vacuum state around the signal transmitting device so as to reduce the noise.

Description

technical field [0001] The invention belongs to the technical field of frequency modulation broadcasting transmitters, and in particular relates to a frequency modulation broadcasting transmitter with the function of reducing temperature and noise. Background technique [0002] Generally speaking, FM transmitter is the abbreviation of FM broadcast transmitter, which is mainly used to transmit the voice and music programs of FM radio stations wirelessly. The sideband noise of the transmitter refers to the noise that is centered on the carrier frequency and distributed in a wide frequency range when the transmitter does not add a modulation signal, referred to as transmitter noise. The frequency band of the transmitter noise is about 2-3MHz, which is much larger than the channel spacing. Therefore, it not only forms interference in adjacent channels, but also has an impact in the 2-3MHz frequency band. The temperature of the circuit board in the transmitter is getting higher ...

AI Technical Summary

Problems solved by technology

The temperature of the circuit board in the transmitter is getting higher and higher under long-term operation, and it needs to be cooled in time, otherwise the equipment is easy to burn out

[0003] In the prior art, most of the cooling devices of the FM transmitter will absorb the heat of the circuit board but dissipate it into the casing or affect the internal parts. The FM radio transmitter lacks a certain noise reduction function, and the noise of the transmitter It will cause interference to the signal, and the noise will cause hearing damage

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