Communications: directive radio wave systems and devices (e.g. – Radar transponder system
Patent
1989-06-12
1991-01-08
Tarcza, Thomas H.
Communications: directive radio wave systems and devices (e.g.,
Radar transponder system
342 44, G08G 101
Patent
active
049839764
ABSTRACT:
A data transmission system includes a data carrier which has a memory for storing therein data including an identification code and which is attached to an object and a main apparatus having a microwave oscillator so as to conduct communications with the data carrier by use of a microwave, thereby writing data in or reading data from the memory of the data carrier.
The main apparatus transmits a microwave modulated by a command or data and thereafter transmits a nonmodulated carrier for a predetermined period of time. On receiving a command, the data carrier executes a read/write operation on the memory and then generates a response. The data carrier receives the nonmodulated carrier sent from the main apparatus so as to conduct a modulation of quadrature phase-shift keying thereon by use of response data, thereby reflectively transmitting the modulated carrier with a plane of polarization shifted from a plane of polarization of the received wave by 90.degree..
REFERENCES:
patent: 4242663 (1980-12-01), Slobodin
patent: 4278977 (1981-07-01), Nossen
patent: 4364043 (1982-12-01), Cole et al.
patent: 4641374 (1987-02-01), Oyama
Fujisaka Hisato
Hirose Masanobu
Igarashi Sadao
Miwa Katsuji
Nozu Toshimitsu
Hellner Mark
Omron Tateisi Electronics Co.
Tarcza Thomas H.
LandOfFree
Signal transmission system and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal transmission system and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal transmission system and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-937650