Title :
Transmitter Architectures Based on Near-Field Direct Antenna Modulation
Author :
Babakhani, Aydin ; Rutledge, David B. ; Hajimiri, Ali
Author_Institution :
Dept. of Electr. Eng., California Inst. of Technol., Pasadena, CA
Abstract :
A near-field direct antenna modulation (NFDAM) technique is introduced, where the radiated far-field signal is modulated by time-varying changes in the antenna near-field electromagnetic (EM) boundary conditions. This enables the transmitter to send data in a direction-dependent fashion producing a secure communication link. Near-field direct antenna modulation (NFDAM) can be performed by using either switches or varactors. Two fully-integrated proof-of-concept NFDAM transmitters operating at 60 GHz using switches and varactors are demonstrated in silicon proving the feasibility of this approach.
Keywords :
microwave antennas; microwave switches; radio transmitters; varactors; communication link; frequency 60 GHz; fully-integrated proof-of-concept transmitters; near-field direct antenna modulation; near-field electromagnetic boundary conditions; radiated far-field signal; switches; transmitter architectures; varactors; Communication switching; Dipole antennas; Radio frequency; Radio transmitters; Receivers; Receiving antennas; Switches; Transceivers; Transmitting antennas; Varactors; BiCMOS; CMOS switch; dielectric lens; dipole; integrated antennas; integrated circuits; modulation; phased-array; reflector; secure communication; silicon Germanium; surface-wave; transmitter; varactor;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2008.2004864
