Title:
CALIBRATION APPARATUS AND METHOD FOR ANTENNA IMPEDANCE DETECTION
Document Type and Number:
WIPO Patent Application WO/2022/222583
Kind Code:
A1
Abstract:
A calibration apparatus and method for antenna impedance detection, aiming to solve the problem of how to independently calibrate different terminal devices, and improve the accuracy of impedance detection after calibration. The calibration apparatus is applied to a test PCB. In the test PCB, radio frequency seats are connected to a transceiver by means of a radio frequency front end circuit. The transceiver is connected to an impedance detection path by means of an impedance detection interface, for measuring a reflection coefficient of the transceiver looking into the impedance detection path. The calibration apparatus comprises a fixture PCB, and a calibration circuit and probes provided on the fixture PCB. The calibration circuit is connected to the probes. The probes are used for connecting to a vector network analyzer or the radio frequency seats. When connected to the vector network analyzer, the probes are used for measuring a first reflection coefficient of the probes looking into the calibration circuit; and when connected to the radio frequency seats, the probes are used for measuring a second reflection coefficient of the transceiver looking into the calibration circuit, so as to complete the calibration for antenna impedance detection according to the first reflection coefficient and the second reflection coefficient.
Inventors:
LIU LIANG (CN)
Application Number:
PCT/CN2022/076085
Publication Date:
October 27, 2022
Filing Date:
February 11, 2022
Export Citation:
Assignee:
HONOR DEVICE CO LTD (CN)
International Classes:
G01R35/00; G01R27/06
Foreign References:
| CN113267742A | 2021-08-17 | |||
| CN112684253A | 2021-04-20 | |||
| US20190334565A1 | 2019-10-31 | |||
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| US20090256644A1 | 2009-10-15 | |||
| CN104378085A | 2015-02-25 | |||
| US20120109566A1 | 2012-05-03 | |||
| CN112394227A | 2021-02-23 | |||
| US20190068156A1 | 2019-02-28 | |||
| CN101464482A | 2009-06-24 | |||
| CN104991124A | 2015-10-21 | |||
| JP2013130405A | 2013-07-04 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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