Advanced search
1 file | 1.08 MB Add to list

Ultralow-power radio frequency beamformer using transmission-line transformers and tunable passives

Author
Organization
Abstract
A simple, low-loss technique for radio frequency (RF) beamforming is realized by serially combining the antennas in an array using transmission-line transformers (without magnetic components) incorporated into the feed line and a programmable admittance placed in shunt across each antenna's feed port. Utilizing the feed structure for signal combining eliminates the need for additional RF combining structures. Furthermore, taking advantage of the symmetry inherent in a phased array, we propose a new method for passive phase shifting that only requires one tunable element per antenna. The beamformer, which requires zero active power, is demonstrated on an FR4 printed circuit board with a linear, two-element, array of half-wave dipoles at 2.05 GHz using a digitally tunable capacitor as the programmable admittance. A loss in array gain of 1.07 dB is realized when compared to an identical array with ideal phase combining.
Keywords
Antenna array, beam steering, phase shifter, phased array, series, connected antennas, series phased array

Downloads

  • (...).pdf
    • full text
    • |
    • UGent only
    • |
    • PDF
    • |
    • 1.08 MB

Citation

Please use this url to cite or link to this publication:

MLA
Anderson, Matthew Giorgis et al. “Ultralow-power Radio Frequency Beamformer Using Transmission-line Transformers and Tunable Passives.” IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS 29.2 (2019): 158–160. Print.
APA
Anderson, M. G., Thielens, A., Wielandt, S., Niknejad, A., & Rabaey, J. (2019). Ultralow-power radio frequency beamformer using transmission-line transformers and tunable passives. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, 29(2), 158–160.
Chicago author-date
Anderson, Matthew Giorgis, Arno Thielens, Stijn Wielandt, Ali Niknejad, and Jan Rabaey. 2019. “Ultralow-power Radio Frequency Beamformer Using Transmission-line Transformers and Tunable Passives.” Ieee Microwave and Wireless Components Letters 29 (2): 158–160.
Chicago author-date (all authors)
Anderson, Matthew Giorgis, Arno Thielens, Stijn Wielandt, Ali Niknejad, and Jan Rabaey. 2019. “Ultralow-power Radio Frequency Beamformer Using Transmission-line Transformers and Tunable Passives.” Ieee Microwave and Wireless Components Letters 29 (2): 158–160.
Vancouver
1.
Anderson MG, Thielens A, Wielandt S, Niknejad A, Rabaey J. Ultralow-power radio frequency beamformer using transmission-line transformers and tunable passives. IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS. Piscataway: Ieee-inst Electrical Electronics Engineers Inc; 2019;29(2):158–60.
IEEE
[1]
M. G. Anderson, A. Thielens, S. Wielandt, A. Niknejad, and J. Rabaey, “Ultralow-power radio frequency beamformer using transmission-line transformers and tunable passives,” IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, vol. 29, no. 2, pp. 158–160, 2019.
@article{8605562,
  abstract     = {A simple, low-loss technique for radio frequency (RF) beamforming is realized by serially combining the antennas in an array using transmission-line transformers (without magnetic components) incorporated into the feed line and a programmable admittance placed in shunt across each antenna's feed port. Utilizing the feed structure for signal combining eliminates the need for additional RF combining structures. Furthermore, taking advantage of the symmetry inherent in a phased array, we propose a new method for passive phase shifting that only requires one tunable element per antenna. The beamformer, which requires zero active power, is demonstrated on an FR4 printed circuit board with a linear, two-element, array of half-wave dipoles at 2.05 GHz using a digitally tunable capacitor as the programmable admittance. A loss in array gain of 1.07 dB is realized when compared to an identical array with ideal phase combining.},
  author       = {Anderson, Matthew Giorgis and Thielens, Arno and Wielandt, Stijn and Niknejad, Ali and Rabaey, Jan},
  issn         = {1531-1309},
  journal      = {IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS},
  keywords     = {Antenna array,beam steering,phase shifter,phased array,series,connected antennas,series phased array},
  language     = {eng},
  number       = {2},
  pages        = {158--160},
  publisher    = {Ieee-inst Electrical Electronics Engineers Inc},
  title        = {Ultralow-power radio frequency beamformer using transmission-line transformers and tunable passives},
  url          = {http://dx.doi.org/10.1109/LMWC.2018.2886628},
  volume       = {29},
  year         = {2019},
}

Altmetric
View in Altmetric
Web of Science
Times cited: