Adaptive impedance matching (AIM) for electrically small radio receiver antennas
US8068800B2 · kind B2 · utility
1Cited by
6References
43Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 2008 |
| Grant date | Nov 29, 2011 |
| Priority date | — |
| Expiry date | Mar 12, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B17/318
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method of tuning an antenna circuit includes: (a) receiving a signal on an antenna, (b) producing a received signal strength indication based on the received signal, (c) using the received signal strength indication to produce a control voltage, (d) using the control voltage to control a capacitance in an antenna matching circuit, (e) changing the control voltage to minimize a ratio of a change in the received signal strength indication to a change in the control voltage and (f) repeating steps (a), (b), (c), (d) and (e). An apparatus that implements the method is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.