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RF system with integrated phase shifters using dual multi-phase phase-locked loops

Patent image
CCDC ARL

An RF system comprising of outputs to an electronically scanning antenna for radiating electromagnetic energy; at least one waveform generator; two multiphase phase-locked loops integrated with the waveform generator, the phase locked loops operating to provide multiple shifted phases to a waveform. Optionally, the two multiphase phase-locked loops may each be divided down by a bank of frequency dividers to further increase the number of phase shifts. The phases generated from each multiphase phase-locked loops are selected with multiplexers then mixed together. These upper or lower sidebands are then mixed with the up converted waveform which results in a phase shift for the waveform associated with each antenna element.

Inventors: 
Dai, Fa Foster; Goldman, Geoffrey
Patent Number: 
Technical domain: 
Communications
FIle Date: 
2013-02-15
Grant Date: 
2016-05-17
Grant time: 
1,187 days
Grant time percentile rank: 
21
Claim count percentile rank: 
6
Citations percentile rank: 
1
'Cited by' percentile rank: 
1
Assignee: 
US ARMY