公开(公告)号：US20240393429A1

公开(公告)日：2024-11-28

申请号：US18323967

申请日：2023-05-25

Applicant: Infineon Technologies AG

Inventor： Thomas OBERMUELLER ,  Andreas SCHWARZ ,  Stefan HERZINGER ,  Bernhard BERGER ,  Stefan SCHMALZL ,  Faisal AHMED ,  Muhammad FURQAN

IPC: G01S7/40 ,  G01R29/08

Abstract: A device may include a receive (Rx) antenna input to couple an Rx antenna to an Rx chain, and a signal coupler to inject the test signal toward the Rx antenna. The device may include an Rx antenna switch to, in a first switch state, cause the Rx antenna to be isolated from the Rx chain and, in a second switch state, permit the test signal to probe the Rx antenna. The Rx chain may measure a phasor of a first baseband signal generated based on a first reflected test signal and a phasor of a second baseband signal generated based on a second reflected test signal. The device may include a control circuit to compute a complex ratio based on the phasors, compute a measured reflection coefficient based on the complex ratio and using a transfer function, and monitor an impedance matching of the Rx antenna.