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COST EFFECTIVE HYBRID PROTECTION FOR HIGH POWER AMPLIFIER

  • US 20190312555A1
  • Filed: 12/30/2016
  • Published: 10/10/2019
  • Est. Priority Date: 12/30/2016
  • Status: Active Grant
First Claim
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1. A solid state radio frequency generation system for an electromagnetic cooking device having an enclosed cavity in which a food load is placed, the solid state radio frequency generation system comprising:

  • a small signal generator for generating an input RF signal;

    an RF feed configured to introduce electromagnetic radiation into the enclosed cavity to heat up and prepare the food load, the RF feed configured to receive reflected electromagnetic radiation from the enclosed cavity;

    a high-power RF amplifier coupled between the small signal generator and the RF feed, the high-power RF amplifier comprising;

    at least one amplifying stage configured to output a signal that is amplified in power with respect to the input RF signal; and

    a circulator for directing the amplified output signal to the RF feed and for redirecting any reflected waves and their associated power received from the RF feed to a dummy load; and

    a hardware protection component for detecting backward power in the reflected electromagnetic radiation received by the RF feed and for reducing power supplied to the at least one amplifying stage if the backward power exceeds a power threshold within a time scale that prevents electrical stress or damage to the circulator.

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