发明名称 |
Modulated retroreflection system for secure communication and identification |
摘要 |
A modulated retroreflection system for secure two-way communication and identification includes a transceiver at a first location and a transponder at a second location. The transponder receiving, modulating, and reflecting the signal back to the transceiver includes a retroreflector having a at least one reflective surface coated with an electro-responsive material. The electro-responsive material modulating the reflection coefficient of the reflective surface thereby modulating signals reflected by the surface. The transponder further includes a modulator electrically connected to the electro-responsive material for applying a modulated bias voltage thereby modulating the refractive index and consequently the electrical phase, and/or amplitude of the reflected signal.
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申请公布号 |
US5819164(A) |
申请公布日期 |
1998.10.06 |
申请号 |
US19960592934 |
申请日期 |
1996.01.29 |
申请人 |
THE UNITED STATES OF AMERICA AS REPRESENTED BY THE SECRETARY OF THE ARMY;TRACOR AEROSPACE ELECTRONIC SYSTEMS, INC. |
发明人 |
SUN, XIAOGUANG G.;BABBITT, RICHARD W. |
分类号 |
G01S13/75;G01S13/78;H01Q3/46;H01Q15/18;H01Q19/06;H04B7/145;(IPC1-7):H01Q15/00;H04B7/00 |
主分类号 |
G01S13/75 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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