Antenna interface
US6735418B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2000 |
| Grant date | May 11, 2004 |
| Priority date | — |
| Expiry date | Mar 16, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An antenna interface for a Time Division Duplex (TDD) radio transceiver allows a transceiver to be attached to an antenna/filter without the need for an antenna switch. The antenna interface includes a single Balun circuit to convert a single-ended signal to/from differential signals, and a single impedance matching circuit to match an impedance at an output of the single Balun circuit with an input impedance of a Low Noise Amplifier (LNA) of a receiver and to provide an output impedance of a Power Amplifier (PA) of a transmitter. The single impedance matching circuit is coupled to both the LNA and the PA. The LNA and the PA are based on CMOS technology and made within a single integrated circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.