TY - GEN
T1 - Adjoint Optimization of 3D Printed RF GRIN Lenses
AU - Whiting, Eric B.
AU - Campbell, Sawyer D.
AU - MacKertich-Sengerdy, Galestan
AU - Soltani, Saber
AU - Werner, Douglas H.
AU - Werner, Pingjuan L.
N1 - Publisher Copyright:
© 2022 European Association for Antennas and Propagation.
PY - 2022
Y1 - 2022
N2 - Additive manufacturing makes possible the rapid design and testing of gradient index (GRIN) lenses. GRIN lenses, whose refractive index profiles are spatially-varying, have been shown to improve the gain of antenna systems while in more compact forms. However, optimization of the GRIN lens profiles is difficult because the lenses can be many wavelengths wide, and the simulations slow to compute. Furthermore, the large number of design variables makes solving the GRIN lens profile a challenging problem. However, these problems can be remedied using adjoint sensitivities to compute the gradient for every design variable in only two simulations. Then local optimization approaches can follow these gradients to rapidly converge to a good candidate solution. To demonstrate the efficacy of the approach, a GRIN lens design was optimized to have the same measured broadside gain as a 20 dB standard gain horn.
AB - Additive manufacturing makes possible the rapid design and testing of gradient index (GRIN) lenses. GRIN lenses, whose refractive index profiles are spatially-varying, have been shown to improve the gain of antenna systems while in more compact forms. However, optimization of the GRIN lens profiles is difficult because the lenses can be many wavelengths wide, and the simulations slow to compute. Furthermore, the large number of design variables makes solving the GRIN lens profile a challenging problem. However, these problems can be remedied using adjoint sensitivities to compute the gradient for every design variable in only two simulations. Then local optimization approaches can follow these gradients to rapidly converge to a good candidate solution. To demonstrate the efficacy of the approach, a GRIN lens design was optimized to have the same measured broadside gain as a 20 dB standard gain horn.
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M3 - Conference contribution
AN - SCOPUS:85130595657
T3 - 2022 16th European Conference on Antennas and Propagation, EuCAP 2022
BT - 2022 16th European Conference on Antennas and Propagation, EuCAP 2022
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 16th European Conference on Antennas and Propagation, EuCAP 2022
Y2 - 27 March 2022 through 1 April 2022
ER -