Patent · US Expired

On-board unit for transponder operation

US5734965A · kind A · utility

4Cited by

1References

13Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Ulrich Kersken · Bad Salzdetfurth, DE
Wilhelm Grabow · Nordstemmen, DE
Wolfgang Detlefsen · Hildesheim, DE

Key dates

Filing date	Sep 25, 1996
Grant date	Mar 31, 1998
Priority date	—
Expiry date	Sep 25, 2016

Classification

Technology area (CPC G)Physics
CPC primaryG01S13/765
WIPO fieldControl
WIPO sectorInstruments

Abstract

An on-board unit includes at least one receiving and transmitting antenna for a bidirectional transmission of data which works in accordance with the transponder method. To compensate for interference fading, a high-frequency amplifier is connected in an incoming circuit to the demodulator/modulator, through which the transmission range of the transmission distance is improved as well. The same amplifier and the demodulator/modulator can be used in downlink and uplink operation. In uplink operation, the demodulator/modulator can alternatively subject the carrier signal to amplitude shift keying or phase shift keying.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.