• DOI:10.1109/LAWP.2019.2947847
• Corpus ID: 189928167

Nonreciprocal Yagi–Uda Filtering Antennas

@article{Zang2019NonreciprocalYF,
  title={Nonreciprocal Yagi–Uda Filtering Antennas},
  author={Jiawei Zang and X. T. Wang and Alejandro {\'A}lvarez Melc{\'o}n and Juan Sebasti{\'a}n G{\'o}mez-D{\'i}az},
  journal={IEEE Antennas and Wireless Propagation Letters},
  year={2019},
  volume={18},
  pages={2661-2665}
}

• J. Zang, X. Wang, +1 author J. S. Gómez-Díaz
• Published 14 June 2019
• Business
• IEEE Antennas and Wireless Propagation Letters

This letter proposes a novel and compact nonreciprocal filtering antenna based on temporal modulation. The device is composed of a third-order filtering section integrated into a Yagi–Uda planar printed antenna. Strong nonreciprocity in transmission and reception is achieved at the same operation frequency by time-modulating the resonators of the filtering section. These resonators are implemented as quarter-wavelength microstrip lines terminated with varactors located on the ground plane. Such plane is also employed as a reflector for the Yagi–Uda antenna and to host the coplanar waveguides that feed low-frequency signals to the varactors, thus leading to a very compact design. A prototype is manufactured and successfully tested at 2.4 GHz, showing isolations greater than 20 dB between transmission and reception modes in both E- and H-planes for all directions in space and a gain drop of only 3.5 dB compared to a reference antenna. The proposed devices can easily be integrated with other electronic circuits and may find exciting applications in communication, radar, and sensing systems.