Calibrator for acoustic surface wave filter test and calibration method thereof
A technology of surface acoustic wave and calibration parts, which is applied in the field of calibration, can solve the problems of staying, lack of fixture reference surface and test channel calibration means, and the inability of test channel and fixture reference surface to be included in the calibration category, so as to improve measurement accuracy and reduce The effect of measurement error
Inactive Publication Date: 2017-09-29
THE 41ST INST OF CHINA ELECTRONICS TECH GRP
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Problems solved by technology
[0005] At present, due to the lack of calibration methods for fixture reference planes and test channels, the calibration only stays on the calibration of the test instrument port, and the test channel and fixture reference plane cannot be included in the calibration category.
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[0028] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:
[0029] The main measuring instrument of the surface acoustic wave filter is a vector network analyzer, so the calibration scheme of the surface acoustic wave filter fixture in the present invention adopts the TRL calibration method for the microstrip line, and for each specification of the fixture, a straight-through calibration Parts, one open circuit calibration part and one load calibration part, the vector network analyzer is used to calibrate the fixture reference plane defined for the test and the entire test channel to ensure the measurement accuracy of the entire high and low temperature test system.
[0030] SAW filter fixtures such as Figure 2~4 As shown, it includes two parts, the clamp body and the fixture base. A single clamp body can hold 4 SAW filters. After multiple fixture bases are expanded and connected, 70 clamp bodies can b...
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The invention discloses a calibrator for acoustic surface wave filter test and a calibration method thereof, and belongs to the technical field of calibration. A high and low temperature resistant FR-4 board is used as the bearing material of the calibrator to realize calibration in high and low temperature environments; the calibration method can realize calibration of channels and fixture reference surfaces of a large batch of acoustic surface wave filter test systems, furthest eliminate the influence of environment, electric interference and the like and reduce the measurement error of an acoustic surface wave filter; and by introducing temperature change as a calibration parameter, calibration of the acoustic surface wave filter at -55 DEG C to 125 DEG C is realized, and the measurement precision is improved.
Description
technical field [0001] The invention belongs to the technical field of calibration, and in particular relates to a calibration piece used for surface acoustic wave filter testing and a calibration method thereof. Background technique [0002] With its excellent performance, surface acoustic wave filters are widely used in mobile communications, navigation, wireless data transmission, electronic audio-visual and other fields. The annual market demand is hundreds of millions. ~+125°C) testing and screening. The block diagram of the test system for testing and screening is as follows: figure 1 shown. [0003] At present, batches of surface acoustic wave filters are tested and screened at high and low temperatures before leaving the factory, and fixtures that can clamp filters in batches are used, such as figure 1 As shown, each fixture clamps 4 surface acoustic wave filters, a total of 70 fixtures, and realizes the testing and screening of 280 surface acoustic wave filters. ...
Claims
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IPC IPC(8): G01R35/00
CPCG01R35/007
Inventor 薛沛祥乔宏志
Owner THE 41ST INST OF CHINA ELECTRONICS TECH GRP