Dual frequency band wireless LAN

US7865150B2 · kind B2 · utility

Assignee

• Atheros Communications, Inc. · US

Inventors

• William J. McFarland · Los Altos, US
• Keith K. Onodera · Berkeley, US
• Arie Shor · Sunnyvale, US
• David Su · Saratoga, US
• Manolis Terrovitis · Berkeley, US
• John Thomson · Union City, US
• Masoud Zaragari · Cupertino, US

Key dates

• Filing date: Jun 26, 2007
• Grant date: Jan 4, 2011
• Expiry date: Aug 13, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W84/12
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A dual band radio is constructed using a primary and secondary transceiver. The primary transceiver is a complete radio that is operational in a stand alone configuration. The secondary transceiver is a not a complete radio and is configured to re-use components such as fine gain control and fine frequency stepping of the primary transceiver to produce operational frequencies of the secondary transceiver. The primary transceiver acts like an intermediate frequency device for the secondary transceiver. Switches are utilized to divert signals to/from the primary transceiver from/to the secondary transceiver. The switches are also configured to act as gain control devices. Antennas are selected using either wideband or narrowband antenna switches that are configured as a diode bridge having high impedance at operational frequencies on control lines that bias the diodes.