Antenna device

Details Antenna device Antenna device

2007-10-03

2010-10-12

Sharma, Sujatha (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Plural transmitters or receivers

C455S127100, C455S343300, C455S575900, C340S572700, C340S693100, C340S005720

Reexamination Certificate

active

07813755

ABSTRACT:
An antenna device includes: a transmitting unit which is connected to a control unit of an in-vehicle device mounted at a vehicle; and a transmission antenna connected to the transmitting unit. The transmitting unit operates the transmission antenna based on a binary signal and a carrier signal from the control unit. The transmitting unit includes: a duty ratio controller that modifies the binary signal to a duty ratio signal having a prescribed duty ratio and outputs the duty ratio signal; and a driving circuit that supplies an energizing current to the transmission antenna based on the carrier signal. The duty ratio controller changes intensity of the signal transmitted from the transmission antenna by changing the energizing current according to the duty ratio signal so as to form a desired communication range.

REFERENCES:
patent: 6100603 (2000-08-01), Gold
patent: 6816081 (2004-11-01), Okada et al.
patent: 7170419 (2007-01-01), Masui
patent: 2004/0264620 (2004-12-01), Tanaka
patent: 2006/0077037 (2006-04-01), Luo et al.
patent: 2006/0238296 (2006-10-01), Konno
patent: 2007/0152833 (2007-07-01), Kaplan et al.
patent: 2009/0017781 (2009-01-01), Fujii
patent: 2002-047835 (2002-02-01), None

Affiliated with

Also associated with

Rating

Antenna device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Antenna device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4226902