Combined Single-Layer K-Band Transmitarray and Beamforming S-Band Antenna Array for Satcom

Daniel E. Serup, Gert Frølund Pedersen, Shuai Zhang*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

In this paper, a dual-band antenna at 4.5 GHz and 25 GHz is presented. The antenna is a low-frequency phased patch antenna array combined with a high-frequency transmitarray with a fixed beam. The lowfrequency patch antenna array and the high-frequency transmitarray feed share the same aperture area. The high-frequency transmitarray surface only uses a single substrate layer and is electrically transparent to the low-frequency phased array with beamforming. The antenna is measured to achieve an impedance bandwidth of 350 MHz and 3 GHz, and a gain of 15.4 dBi and 23.5 dBi, at S- and K-band respectively. With an impressive frequency-ratio of 5.55 and an aperture area of only 12x12cm the antenna achieves an aperture efficiency of 66% and 15% in the two bands respectively. Additionally, the low-frequency beamforming capabilities (with the existence of transmitarray surface) are measured and the antenna is shown to have a 60-degree scanning range with only a 0.22 dB gain drop-off.
Original languageEnglish
JournalIEEE Open Journal of Antennas and Propagation
Volume3
Pages (from-to)1134-1140
Number of pages7
ISSN2637-6431
DOIs
Publication statusPublished - Aug 2022

Keywords

  • Antenna
  • Antenna Array
  • Antenna measurements
  • Antennas
  • Array signal processing
  • Beamforming
  • Dual-band
  • Frequency measurement
  • Gain measurement
  • K-Band
  • Measurement
  • Nano-satellite
  • Prototype
  • Prototypes
  • S-band
  • Satellite
  • Shared Aperture
  • Transmitarray
  • Transmitting antennas
  • antenna
  • measurement
  • transmitarray
  • K-band
  • nano-satellite
  • satellite
  • antenna array
  • prototype
  • shared aperture
  • beamforming

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