Dual-band combined-aperture variable inclination continuous transverse stub antenna with consistent beam direction

Yunlong Lu, Yang You, Yi Wang, Zi Wei Zheng, Jifu Huang

Research output: Contribution to journalArticlepeer-review

Abstract

This paper presents a Tx/Rx dual-band combined-aperture variable inclination continuous transverse stub (VICTS) antenna for low-earth-orbit Satellite-on-the-Move (SOTM) applications. The beam directions for the Tx and Rx bands are kept consistent during beam scanning, so that the antenna allows a duplex link. The topology of the combined-aperture VICTS antenna is derived from the requirement for consistent beam directions. Non-uniform slow-wave structures are used to achieve the required phase difference and phase-changing rate between the radiation slots in the two bands, while maximizing the antenna efficiency. Pre-deflection technique is applied to the radiation slots to reduce the gain drop at a wide beam scanning angle. A prototype operating at K- and Ka-bands is designed, fabricated and measured. Experimental results show that the antenna has a consistent beam direction during scanning in the frequency ranges of 19-21 GHz (Rx band) and 29-31 GHz (Tx band). The maximum beam directions in Tx and Rx bands exceeds ±47° at a relative rotation angle of 40°, and the gain drop during the beam scanning is reduced within 2.3 dB and 3.5 dB.

Original languageEnglish
Article number9785436
JournalIEEE Transactions on Antennas and Propagation
Early online date30 May 2022
DOIs
Publication statusE-pub ahead of print - 30 May 2022

Bibliographical note

Publisher Copyright:
IEEE

Keywords

  • Antennas
  • beam scanning
  • Directive antennas
  • Dual band
  • dual-band antennas
  • Low earth orbit satellites
  • millimeter wave antennas
  • Satellite antennas
  • Satellite-on-the-move (SOTM)
  • Slot antennas
  • Topology
  • Variable inclination continuous transverse stub antenna

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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