ISSCC 2008 / SESSION 9 / mm - Wave & PHASED ARRAYS / 9 . 5 9 . 5 A Near - Field Modulation Technique Using Antenna Reflector Switching
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چکیده
In typical radio transmitters, the signal is modulated at lower frequencies and then up-converted, amplified, and radiated by an antenna. In the absence of multi-path, receivers at different angles observe the same modulated signal, only different in gain factor and time delay. Although a directional antenna radiates more power in some angles than others, the signal transmitted to any direction still carries the same information that, in principle, can be recovered with a sensitive receiver.
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تاریخ انتشار 2008