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Abstract
A wireless frontend includes a phased antenna array [400], a weighting factor computation circuit [434], and hybrid time delays including a set of variable true time delays [420,422] and a set of phaseshifting interpolators [418] that interpolate between the true time delays using weighting factors computed by the weighting factor computation circuit [434], where the weighting factor computation circuit uses nonorthogonal base vectors to compute the weighting factors. The phaseshifting interpolators [418] may be implemented using signal splitters [410], weighting multipliers [412], and signal combiners [414]. The weighting multipliers [412] may be implemented using variable gain amplifiers, variable attenuators, or switched resistor networks. The number of variable true time delays [420,422] is preferably less than half the number of antenna elements in the phased antenna array [400]. In the case were the phased antenna array is a linear array, the number of variable true time delays may be just one. In the case where the phased antenna array is a 2dimensional array, the number of variable true time delays may be just two, but preferably three.
Original language  English 

Patent number  WO2018215647 
Publication status  Published  29 Nov 2018 
Keywords
 MillimeterWave
 phased array
 Wireless communication
 interpolation
 delay
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Projects
 1 Active

Zwaartekracht ECO Research Centre for Integrated Nanophotonics
Koonen, A. M. J. (., van Zantvoort, J. H. C., Smit, M., Cao, Z., van der Heide, S., Mamun, M., Shi, B., Perez, J. C., Mekonnen, K. A., Trinidad, A. M., Zhang, X. & Spiegelberg, M.
1/01/14 → 31/12/23
Project: Research direct