Phase-only Synthesis Algorithm for Transmitarrays and Dielectric Lenses
Keywords:Antenna array synthesis, dielectric antennas, lens antennas, transmitarrays
In this work a phase-only synthesis algorithm is applied for the design of lens-array antennas yielding a desired radiation pattern. The potential relevance of spillover effect on the lens radiation pattern is illustrated, making it necessary to include it in the lens model and to take it into account in the synthesis algorithm. Thus, both the contribution of the lens and the spillover radiation are jointly modeled as a planar array. Moreover, in order to validate the algorithm, it has been applied to the synthesis of pixelated dielectric lenses, which have been simulated using a commercial software. Simulations show good agreement with the algorithm results, validating its use for this type of lenses.
J. Thorton and K.-C. Huang, Modern Lens Antennas for Communications Engineering, Wiley-IEEE Press, Hoboken, New Jersey, 2013.
C. G. M. Ryan, M. R. Chachamir, J. Shaker, J. R. Bray, Y. M. M. Antar, and A. Ittipiboon, “A wideband transmitarray using dual-resonant double square rings,” IEEE Trans Antennas Propagat., vol. 58, no. 5, pp. 1486-1493, May 2010.
S. Zainud-Deen, S. Gaber, H. Malhat, and K. Awadalla, “Single feed dual-polarization dualband transmitarray for satellite applications,” ACES Journal, vol. 29, no. 2, pp. 149-156, Feb. 2014.
L. Di Palma, A. Clemente, L. Dussopt, R. Sauleau, P. Potier, and P. Pouliguen, “Circularly-polarized reconfigurable transmitarray in Ka-band with beam scanning and polarization switching capabilities,” IEEE Trans. Antennas Propagat., vol. 65, no. 2, pp. 529-540, Feb. 2017.
W. P. M. N. Keizer, “Low sidelobe pattern synthesis using iterative Fourier techniques code in MATLAB,” IEEE Antennas Propag. Mag., vol. 51, no. 2, pp. 137-150, Apr. 2009.
W. P. M. N. Keizer, “Fast low-sidelobe synthesis for large planar array antennas utilizing successive fast Fourier transforms of the array factor,” IEEE Trans. Antennas Propagat., vol. 55, no. 3, pp. 715- 722, Mar. 2007.
P. Nayeri, M. Liang, R. A. Sabory-García, M. Tuo, F. Yang, M. Gehm, H. Xin, and A. Z. Elsherbeni, “3D printed dielectric reflectarrays: Low-cost high-gain antennas at sub-millimeter waves,” IEEE Trans. Antennas Propagat., vol. 62, no. 4, pp. 2000-2008, Apr. 2014.
H. Yi, S.-W. Qu, K.-B. Ng, C. H. Chan, and X. Bai, “3D printed millimeter-wave and terahertz lenses with fixed and frequency scanned beam,” IEEE Trans. Antennas Propagat., vol. 64, no. 2, pp. 442- 449, Feb. 2016.
E. G. Plaza, G. León, S. Loredo, and F. Las-Heras, “A simple model for analyzing transmitarray lenses,” IEEE Antennas Propag. Mag., vol. 57, no. 2, pp. 131-144, Apr. 2015.
Y. Rahmat-Samii, “Useful coordinate transformations for antenna applications,” IEEE Trans. Antennas Propagat., vol. AP-27, no. 4, pp. 571-574, July 1971.
FEKO, ver. 7.0, EM Software & Systems-S.A., Stellenbosch, South Africa, 2014.