TY - RPRT TI - A concave annular array design, based on phasor summation--Part I: Design methodology. AU - W Q Yuan AU - S A Johnson AU - M J Berggren AU - R S Eidens PY - 1988 DO - 10.1177/016173468801000404 UR - https://pubmed.ncbi.nlm.nih.gov/3074551/ ID - 3074551 ER -