Synthesis of Low-Sidelobe Stepped-Amplitude Aperiodic Phased Arrays

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A novel stepped-amplitude aperiodic phased array synthesis method is proposed. The presented technique is based on iterative convex element position perturbations and uses pre-defined excitation amplitudes. A 64-element irregular array with two discrete amplitude levels (0.5 at the edge-elements and 1 at the center-elements) is synthesized for demonstration purposes. The array achieves a side lobe level lower than - 30 dB and a directivity higher than 20 dBi within the given field-of-view (±60 degrees in azimuth and ±15 degrees in elevation). Through comparative studies of the array directivity, effective isotropic radiated power and maximal side lobe level with the ones of the uniformly-fed/amplitude-tapered periodic arrays and a uniformly-fed aperiodic array, it is shown that the proposed stepped-amplitude array provides the best complexity/performance trade-off.
Original languageEnglish
Title of host publication2021 15th European Conference on Antennas and Propagation (EuCAP)
Number of pages5
ISBN (Electronic)978-88-31299-02-2
ISBN (Print)978-1-7281-8845-4
Publication statusPublished - 2021
EventEuCAP 2021: 15th European Conference on Antennas and Propagation (EuCAP) - Virtual Conference at Dusseldorf, Germany
Duration: 22 Mar 202126 Mar 2021


ConferenceEuCAP 2021
Abbreviated titleEuCAP 2021
CityVirtual Conference at Dusseldorf
Internet address

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project

Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • array synthesis
  • phased arrays
  • aperiodic arrays
  • stepped amplitude arrays


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