Dependency on beamwidth in an SD method utilizing two-ray fading characteristics

Ken Hiraga, Kazumitsu Sakamoto, Maki Arai, Tomohiro Seki, Hideki Toshinaga, Tadao Nakagawa, Kazuhiro Uehara

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)


Using ray-tracing propagation calculation, we clarify the dependency on antenna element beamwidth of the channel capacity of a spatial division (SD) transmission method utilizing the characteristics of two-ray fading. It was clarified that the SD transmission method can be effectively applied to microstrip antennas or horn antennas with beamwidth of more than 10, but that it is not effective when applied to narrow-beam antennas with less than 10 beamwidth. In such cases, simple parallel transmission is a better way to utilize the narrow beam to increase channel capacity.

Original languageEnglish
Article number6891136
Pages (from-to)56-59
Number of pages4
JournalIEEE Antennas and Wireless Propagation Letters
Publication statusPublished - Jan 29 2015
Externally publishedYes


  • Beamwidth
  • parallel transmission
  • spatial division transmission
  • two-ray ground reflection

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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