Detector and modulator circuits for passive microwave links

摘要

An RF apparatus (e.g., a wireless label) provides improved backscattering of an incident RF signal by utilizing a separate modulator diode (121), which connects across the antenna (102), to modulate the backscattering of the antenna. A separate detector diode (111) connects across the antenna through an impedance matching network (113) to detect modulated signals received by the antenna.