Radio system for data transmission with one passive end and stat

Details Radio system for data transmission with one passive end and stat Radio system for data transmission with one passive end and stat

1989-05-15

1990-09-11

Blum, Theodore M.

Communications: directive radio wave systems and devices (e.g.,

Directive

Including polarized signal communication transmitter or...

H01Q 2106, H01Q 2124

Patent

active

049566458

ABSTRACT:
The radio system embodying the invention comprises a central station and a terminal stations or passive end. Data signals are transmitted between data processing units which are respectively connected to the central and terminal stations. The radio system is essentially characterized in that the terminal station comprises a square two-dimensional antenna and a microwave switcher so as to phase modulate, by means of a data signal, a microwave transmitted from the terminal station to the central station. This phase modulated microwave is produced from an incident microwave transmitted by the central station and issued to the terminal station by the square two-dimensional antenna. The design of the terminal station is very simple and compact and can be included, as well as the corresponding data processing unit, in a contact-free chip card.

REFERENCES:
patent: 4831384 (1989-05-01), Sefton, Jr.

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