| US 7,502,631 B2 | ||
| Monolithic silicon-based phased arrays for communications and radars | ||
| Hossein Hashemi, So. Pasadena, Calif. (US); Xiang Guan, Pasadena, Calif. (US); and Seyed Ali Hajimiri, Pasadena, Calif. (US) | ||
| Assigned to California Institute of Technology, Pasadena, Calif. (US) | ||
| Filed on Nov. 12, 2004, as Appl. No. 10/988,199. | ||
| Claims priority of provisional application 60/519715, filed on Nov. 13, 2003. | ||
| Prior Publication US 2005/0227660 A1, Oct. 13, 2005 | ||
| Int. Cl. H04B 1/38 (2006.01); H04B 1/06 (2006.01); H04M 1/00 (2006.01) | ||
| U.S. Cl. 455—562.1 [455/273; 455/276.1] | 59 Claims |
| 1. An N-element phased-array receiver comprising:
N phase selectors each adapted to select an arbitrary phase of a local oscillator and to supply the selected phase as an output
signal;
N first mixers each associated with a different one of the N phase selectors and adapted to receive the output signal supplied
by its associated phase selector, each of the N first mixers further adapted to receive an RF signal received by a different
one of N receive antennas and to generate an output signal having a phase that is shifted with respect to the phase of the
RF signal received thereby and a frequency that is lower than the frequency of the received RF signal; and
a shift register configured to receive input control signals and supply output control signals to the N phase selectors.
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