A Noniterative Convoluted Harmonic Beamforming Technique in Time Modulated Arrays

YEŞİLYURT U., KANBAZ İ., Kuzu S., AKSOY E.

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, vol.69, no.2, pp.795-805, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 69 Issue: 2
  • Publication Date: 2021
  • Doi Number: 10.1109/tap.2020.3016475
  • Journal Name: IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aerospace Database, Applied Science & Technology Source, Business Source Elite, Business Source Premier, Communication Abstracts, Compendex, Computer & Applied Sciences, INSPEC, Metadex, zbMATH, Civil Engineering Abstracts
  • Page Numbers: pp.795-805
  • Keywords: Harmonic analysis, Array signal processing, Phased arrays, Switches, Convolution, Antenna radiation patterns, Harmonic enhancement, harmonic steering, sideband radiation (SR), time-modulated arrays (TMAs)
  • Gazi University Affiliated: Yes

Abstract

In this study, the synthesis of the time-modulated array (TMA) has been analyzed in terms of both the enhancement of the intended harmonic component and the steering capability of this harmonic. In order to accomplish the radiation pattern at desired harmonic frequencies, including high-order harmonics, the dual-phase variable pulse amplitude (DPVPA) time sequence signal is proposed. On the other hand, the periodic convolution operator, which based on a specific signal with only certain components in the frequency domain, demonstrates superior ability in completely suppressing the remaining unwanted harmonics. Moreover, without using any optimization technique, the pulse amplitude parameters are obtained through only the methodological analysis; therefore, the proposed method provides convenience in terms of reconfiguration. The harmonic-enhancement capability and harmonic steering flexibility of the proposed approach are shown through representative examples.