@article{oai:muroran-it.repo.nii.ac.jp:02000224,
 author = {HIRATA Akihiko and AKIYAMA Keisuke and KABE Shunsuke and MURATA Hiroshi and MIZUKAMI Masato and 水上　雅人},
 issue = {1},
 journal = {IEICE Transactions on Communications},
 month = {Jan},
 note = {This study investigates the improvement of the channel ca-
pacity of 5-GHz-band multiple-input multiple-output (MIMO) communica-
tion using microwave-guided modes propagating along a polyvinyl chloride
(PVC) pipe wall for a buried pipe inspection robot. We design a planar
Yagi–Uda antenna to reduce transmission losses in communication with
PVC pipe walls as propagation paths. Coupling efficiency between the an-
tenna and a PVC pipe is improved by attaching a PVC adapter with the same
curvature as the PVC pipe’s inner wall to the Yagi–Uda antenna to eliminate
any gap between the antenna and the inner wall of the PVC pipe. The use
of a planar Yagi–Uda antenna with a PVC adaptor decreases the transmis-
sion loss of a 5-GHz-band microwave signal propagating along a 1-m-lomg
straight PVC pipe wall by 7 dB compared to a dipole antenna. The channel
capacity of a 2 × 2 MIMO system using planar Yagi–Uda antennas is more
than twice that of the system using dipole antennas.},
 pages = {197--205},
 title = {Improvement of Channel Capacity of MIMO Communication Using Yagi-Uda Planar Antennas with a Propagation Path through a PVC Pipe Wall},
 volume = {E107.B},
 year = {2024, 2024}
}