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 language | English |
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Article number | 9785436 |
Journal | IEEE Transactions on Antennas and Propagation |
Early online date | 30 May 2022 |
DOIs | |
Publication status | E-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