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A study on antenna gain degradation due to digital phase shifter in phased array antennas
Author(s) -
Kamoda Hirokazu,
Tsumochi Jun,
Kuki Takao,
Suginoshita Fumiyasu
Publication year - 2011
Publication title -
microwave and optical technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.304
H-Index - 76
eISSN - 1098-2760
pISSN - 0895-2477
DOI - 10.1002/mop.26145
Subject(s) - phase shift module , phased array , degradation (telecommunications) , antenna (radio) , electronic engineering , antenna array , electrical engineering , reconfigurable antenna , reflective array antenna , engineering , directional antenna , dipole antenna , slot antenna , coaxial antenna , insertion loss
Abstract We studied antenna gain degradation of phased array antennas due to phase quantization by digital phase shifters, where the amplitude weighting for element excitation and the losses in the phase shifters were taken into account. By adding a phase offset to the ideal analog phase shifts before they are quantized, the degradation can be varied as a result of the change in the phase errors due to quantization. It was shown that the amplitude weighting and losses greatly affected the peak‐to‐peak variation of the degradation and they must be taken into account to obtain the optimum phase offset that gives the least degradation in actual phased array antennas using digital phase shifters. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.26145