Patent ID: 11870477
Assignee: SENSORTEK TECHNOLOGY CORP.
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A transmission structure of antenna and proximity sensing circuit, comprising:
a transmission line, having a first coupling end and a second coupling end, said first coupling end coupled to an antenna, and said second coupling end coupled to a proximity sensing circuit;
a plurality of radio-frequency short-circuit elements, coupled between said transmission line and a ground, and located between said antenna and said proximity sensing circuit; and
a selection circuit, coupled between said radio-frequency short-circuit elements and said ground, and selecting one of said radio-frequency short-circuit elements to be coupled to said ground;
wherein said radio-frequency short-circuit elements are coupled to a plurality of short-circuit points of said transmission line, respectively; said short-circuit points are located at different locations of said transmission line; a plurality of distances between said first coupling end of said transmission line and said short-circuit points are between ¼ wavelength of a plurality of radio-frequency signals ±⅛ wavelength of said radio-frequency signals, respectively; and the frequencies of said radio-frequency signals are different.