Calibration system and method for harmonic cancellation of broadband radio frequency power amplifier
A technology of harmonic elimination and radio frequency power, which is applied in the field of radio frequency semiconductor automatic testing to achieve the effect of improving production efficiency
Active Publication Date: 2021-07-09
佛山市联动科技股份有限公司
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[0009] The present invention provides a calibration system and method for harmonic elimination of broadband radio frequency power amplifiers, to solve one or more technical problems existing in the prior art, and at least provide a beneficial option or create conditions
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[0038] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.
[0039] It should be noted that although the functional modules are divided in the system schematic diagram and the logical order is shown in the flow chart, in some cases, it can be executed in a different order than the module division in the system or the flow chart steps shown or described. The terms "first", "second" and the like in the specification and claims and the above drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.
[0040] The RF input signal is assumed to have an amplitude of 1 and a frequency of The cosine sign...
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The invention discloses a calibration system and method for harmonic elimination of a broadband radio frequency power amplifier. The system includes a radio frequency signal transceiver processing device, a transmission channel, an auxiliary circuit and a calibration circuit; the radio frequency signal transceiver processing device includes an ATE radio frequency signal source, ATE radio frequency receiver, calibration control port and launch control port; the auxiliary circuit includes M auxiliary channels, and the launch channel includes a first broadband power divider, a broadband power combiner, a final stage amplifier, and a first low-pass filter; the calibration circuit The input end is connected with the radio frequency output end of the transmission channel, and the output end of the calibration circuit is connected with the ATE radio frequency receiver. There is no need for segmented high-power filter design, no need to switch the filter, only need to be calibrated, and the harmonic suppression function can be quickly invoked, which can be applied to eliminate the harmonics generated by the RF power amplifier in the entire frequency band. It can improve production efficiency in automated testing.
Description
technical field [0001] The invention relates to the technical field of radio frequency semiconductor automatic testing, in particular to a calibration system and method for harmonic elimination of a broadband radio frequency power amplifier. Background technique [0002] In the requirements of automated testing of RF semiconductors, there are often many RF chips under test (DUTs) that have high RF power requirements, such as some RF switches and RF power amplifiers. However, DUT has strict requirements on test indicators, so it generally requires higher performance indicators of test equipment, such as harmonic suppression capability. [0003] Harmonics are inherent artifacts of RF power amplifiers. Harmonics are often useless and can easily cause interference to other signals at the harmonics, so the harmonic filtering of the power amplifier is very important. Harmonic filtering of power amplifiers is often implemented with filters. [0004] In narrowband RF power amplif...
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IPC IPC(8): H03F3/189H03F3/20G01R31/28G01R35/00
CPCG01R31/2822G01R31/2834G01R35/005H03F3/189H03F3/20
Inventor 刘旭伟范焕新钱立鑫李凯
Owner 佛山市联动科技股份有限公司