Electric power receiving circuit and responder for automatic veh

Details Electric power receiving circuit and responder for automatic veh Electric power receiving circuit and responder for automatic veh

1994-03-09

1996-06-25

Wong, Peter S.

Electric power conversion systems

Current conversion

Using semiconductor-type converter

455300, H02M 706, H04B 126

Patent

active

055306373

ABSTRACT:
A first responder for transmitting an identification signal in response to a microwave interrogation signal comprises an electric power receiving circuit for receiving the interrogation signal to produce a dc power, having a microstrip line antenna having a trapezoid shape whose upside has a width from 1/2 to 1/4 of a wavelength, and a rectifying circuit. The rectifying circuit may be modified. A second responder comprises an electric power receiving circuit having a microstrip line antenna from the received microwave signal, a power supplying circuit for supplying a dc power in the vertical and horizontal positions of the responder against a polarizing plane of the microwave signal, an identification signal generation circuit for transmitting an identification signal through the antenna with given polarization plane by detecting the responder attitude. A third responder receives a microwave signal circularly polarized or polarized in vertical and horizontal directions and transmits the identification signal in either of vertical or horizontal directions according to the received microwave intensity in both directions.

REFERENCES:
patent: 4777490 (1988-10-01), Sharma et al.
patent: 4918749 (1990-04-01), Entschladen et al.
patent: 5394159 (1995-02-01), Schneider et al.
patent: 5428363 (1995-06-01), D'Hont

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