An Ultrawideband Interwoven Spiral Array with Improved Polarization Characteristics

Yunus E. Taskir*, Mustafa Kuloglu, Serkan Simsek

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A compact ultrawideband (UWB) tightly coupled array unit cell with improved circular polarization (CP) is proposed. Previous studies have obtained impedance bandwidth of 10:1 on a ground plane by increasing mutual coupling between array elements by using self-complementary square spiral elements having interweaved arms. However, the axial ratio (AR) of these structures is more than 3-dB in the entire frequency band, thus their use in applications requiring CP is limited. In this study, the interweaved arms of the modified periodic unit cell were resistively loaded. Hence, while achieving both size reduction and improved CP performance, antenna gain is maintained. Simulated AR is less than 3-dB over almost the entire 0.38 - 1.18 GHz frequency band. Simulated voltage standing wave ratio (VSWR) remains below 2.2 in the 0.1 - 1.25 GHz frequency range.

Original languageEnglish
Title of host publication17th European Conference on Antennas and Propagation, EuCAP 2023
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9788831299077
DOIs
Publication statusPublished - 2023
Event17th European Conference on Antennas and Propagation, EuCAP 2023 - Florence, Italy
Duration: 26 Mar 202331 Mar 2023

Publication series

Name17th European Conference on Antennas and Propagation, EuCAP 2023

Conference

Conference17th European Conference on Antennas and Propagation, EuCAP 2023
Country/TerritoryItaly
CityFlorence
Period26/03/2331/03/23

Bibliographical note

Publisher Copyright:
© 2023 European Association for Antennas and Propagation.

Keywords

  • axial ratio
  • circular polarization
  • spiral antenna
  • ultrawideband antenna array

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