The directivity of a Yagi-Uda antenna from an effective propagation constant

@article{Aumann2013TheDO,
  title={The directivity of a Yagi-Uda antenna from an effective propagation constant},
  author={Herbert M. Aumann and Anu Myne and Kristan A. Tuttle},
  journal={2013 IEEE Antennas and Propagation Society International Symposium (APSURSI)},
  year={2013},
  pages={1514-1515}
}
A technique is presented for determining the directivity of a long, uniform Yagi-Uda antenna. It is shown that the maximum directivity is limited by the propagation constant of the particular antenna structure. The propagation constant can be determined by means of a two-port antenna test fixture with M and M + 1 directors.