Method of detecting RF power delivered to a load and complex impedance of the load
First Claim
1. A method of detecting one or more characteristics of a load, the method comprising:
- detecting one or more characteristics of a first signal at the output of a Radio Frequency (RF) power generator, wherein the first signal exhibits a fundamental frequency;
sampling the one or more characteristics of the first signal at a sampling frequency to produce a digital sampled signal, wherein the sampling frequency is determined based on a function of the fundamental frequency of the first signal; and
determining one or more characteristics of a load from the digital sampled signal, wherein the load is in communication with the RF power generator.
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Abstract
Methods and systems of detecting one or more characteristics of a load are disclosed. One or more characteristics of a first signal may be detected at the output of a Radio Frequency (RF) power generator. The first signal may have a fundamental frequency. The one or more characteristics of the first signal may be sampled at a sampling frequency to produce a digital sampled signal. The sampling frequency may be determined based on a function of the fundamental frequency of the first signal. One or more characteristics of a load in communication with the RF power generator may then be determined from the digital sampled signal.
78 Citations
16 Claims
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1. A method of detecting one or more characteristics of a load, the method comprising:
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detecting one or more characteristics of a first signal at the output of a Radio Frequency (RF) power generator, wherein the first signal exhibits a fundamental frequency;
sampling the one or more characteristics of the first signal at a sampling frequency to produce a digital sampled signal, wherein the sampling frequency is determined based on a function of the fundamental frequency of the first signal; and
determining one or more characteristics of a load from the digital sampled signal, wherein the load is in communication with the RF power generator. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for determining one or more characteristics of a load, the system comprising:
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a Radio Frequency (RF) power generator;
a load in communication with the RF power generator;
a detecting device located at the output of the RF power generator;
an analog-to-digital (A-D) converter in communication with the detecting device; and
a digital signal processor (DSP) in communication with the A-D converter, wherein the detecting device detects one or more characteristics of a first signal, wherein the A-D converter converts the one or more characteristics of the first signal into a digital form, wherein the DSP determines one or more characteristics of the load from the digital form of the one or more characteristics of the first signal. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification