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 language | English |
---|---|
Title of host publication | 17th European Conference on Antennas and Propagation, EuCAP 2023 |
Publisher | Institute of Electrical and Electronics Engineers Inc. |
ISBN (Electronic) | 9788831299077 |
DOIs | |
Publication status | Published - 2023 |
Event | 17th European Conference on Antennas and Propagation, EuCAP 2023 - Florence, Italy Duration: 26 Mar 2023 → 31 Mar 2023 |
Publication series
Name | 17th European Conference on Antennas and Propagation, EuCAP 2023 |
---|
Conference
Conference | 17th European Conference on Antennas and Propagation, EuCAP 2023 |
---|---|
Country/Territory | Italy |
City | Florence |
Period | 26/03/23 → 31/03/23 |
Bibliographical note
Publisher Copyright:© 2023 European Association for Antennas and Propagation.
Keywords
- axial ratio
- circular polarization
- spiral antenna
- ultrawideband antenna array