Digitally controlled antenna tuning circuit for radio frequency receivers
US8583065B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 7, 2007 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Nov 19, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/24
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A novel digitally controlled antenna tuning circuit that enables the implementation of low cost, wideband tuning circuits for antennas in receive applications. The invention is operative to switch a plurality of tuning elements into and out of a main receive signal path. Each individual tuning element is switched into or out of the receive signal path using a single PIN diode. For series connected tuning elements, the diode is connected in parallel to the tuning element. For tuning elements connected in parallel, the diode is connected in series with the tuning element. The diodes are switched in accordance with control voltages which forward bias the diodes to effectively create a low resistance path thus either inserting or removing a tuning element from the receive signal path depending on its configuration in the circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.