John C Hooper

Address:

800 Dl St, San Marcos, TX 78666

Phone:

(512)3922255

VIN:

1N4AL21E17N423559

Make:

NISSAN

Model:

ALTIMA

Year:

2007

US Patent:

8368481, Feb 5, 2013

Filed:

Oct 13, 2010

Appl. No.:

12/903387

Inventors:

Yalin Jin - Austin TX, US
Vikram Krishnamurthy - Smyrna GA, US
John Michael Hooper - Smyrna GA, US

Assignee:

Microsemi Corporation - Alisa Viejo CA

International Classification:

H03H 7/42
H01P 1/10

US Classification:

333 25, 333101

Abstract:

A handheld communication device having an RF front end module has a switchable balun comprising a primary winding having a first two port winding and a second two port winding where a low noise amplifier is operatively coupled to the first and second two port windings and a power amplifier is operatively coupled to the first and second two port windings. A secondary winding is operatively coupled to an antenna, and a transceiver is operatively coupled to the low noise amplifier and the power amplifier. When the switchable balun is in a receive state, the antenna is operatively coupled to the transceiver through the low noise amplifier, and when the switchable balun is in a transmit state, the antenna is operatively coupled to the transceiver through the power amplifier. The ratio of the primary winding to the secondary winding is greater than a one-to-one ratio.