Microwave generating device of phase control system and programmable control frequency source chip of microwave generating device

Abstract

The invention is suitable for the technical field of microwaves, and provides a microwave generating device of a phase control system and a programmable control frequency source chip of the microwave generating device. The programmable control frequency source chip comprises a signal generation unit, a numerical control attenuator, a power divider, a plurality of processing circuits connected with the power divider and a microprocessor, wherein the signal generation unit, the numerical control attenuator and the power divider are connected in sequence; the signal generation unit generates a first power signal with a preset frequency, the numerical control attenuator performs first attenuation processing on the first power signal to obtain a second power signal, and the power divider divides the second power signal into multiple power signals in one-to-one correspondence with the multiple processing circuits; each processing circuit in the multiple processing circuits performs phase shift processing and second attenuation processing on the power signals transmitted by the power divider; and the microprocessor controls the signal generation unit, the numerical control attenuator and the plurality of processing circuits to control the frequency, phase and power of an output signal of the programmable control frequency source chip. According to the embodiment of the invention, the output power of the frequency source chip can be more accurately controlled.

Description

technical field [0001] The application belongs to the field of microwave technology, and in particular relates to a phase-controlled microwave generating device and a programmable control frequency source chip thereof. Background technique [0002] Microwave ovens are widely used in microwave heating, drying and other fields. Most traditional microwave ovens in industrial microwave heating and drying applications use magnetrons as microwave sources, and their operating frequency is mainly 915MHz±15MHz, and the power of the microwave oven is in the range of 10W to 10KW. [0003] However, high-voltage devices are required for the magnetron to work. The output power of a microwave oven using a magnetron depends on the anode voltage under high-voltage conditions. The control accuracy of the output power is poor, and the operating frequency is fixed and cannot be adjusted. Contents of the invention [0004] In view of this, the present application provides a phase-controlled m...

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Problems solved by technology

[0003]However, high-voltage devices are required for the operation of the magnetron. The output power of the microwave oven using the magnetron depends on the anode voltage under high-voltage conditions, and the control accuracy of the output power is relatively low. Poor, and the working frequency is fixed and not adjustable

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