Phase-Matched Design of Pinching-Antenna Elements on a 60-GHz Dielectric Rod Waveguide
Abstract
The radiation of pinching antennas, dielectric elements placed on a dielectric waveguide, depends on the element shape. We explain it with a phase-matching, or prism-coupler, picture: the guided rod mode couples into the denser antenna plate at an angle set by the plate-mode effective index, about 31 degrees at 60 GHz, and radiates through the face it reaches first. This yields a simple sizing rule linking element height to contact length. Rectangular, isosceles and right-triangular elements of equal contact length and height are compared from 53 to 67 GHz in full-wave openEMS simulations including the waveguide-to-rod transitions. The rectangle peaks sharply at the rule, reaching 15.9 dBi. The right triangle keeps its gain within 0.7 dB and its side lobes at least 10 dB down over a two-to-one height range. At the rule, both outperform the isosceles element by 1.2 to 2.1 dB, and all remain matched.
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BibTeX
@misc{asimonis2026phasematched,
title = {{Phase-Matched Design of Pinching-Antenna Elements on a 60-GHz Dielectric Rod Waveguide}},
author = {Stylianos D. Asimonis and Dimitrios Tyrovolas and Spyridon Daskalakis and Nikos C. Sagias and Donal P. Lynch and George K. Karagiannidis},
howpublished = {arXiv},
year = {2026},
month = nov,
doi = {10.48550/arxiv.2611.07954},
eprint = {2611.07954},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2611.07954},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - Phase-Matched Design of Pinching-Antenna Elements on a 60-GHz Dielectric Rod Waveguide
AU - Stylianos D. Asimonis
AU - Dimitrios Tyrovolas
AU - Spyridon Daskalakis
AU - Nikos C. Sagias
AU - Donal P. Lynch
AU - George K. Karagiannidis
PY - 2026
DA - 2026/11/05
PB - arXiv
DO - 10.48550/arxiv.2611.07954
UR - https://arxiv.org/abs/2611.07954
AB - The radiation of pinching antennas, dielectric elements placed on a dielectric waveguide, depends on the element shape. We explain it with a phase-matching, or prism-coupler, picture: the guided rod mode couples into the denser antenna plate at an angle set by the plate-mode effective index, about 31 degrees at 60 GHz, and radiates through the face it reaches first. This yields a simple sizing rule linking element height to contact length. Rectangular, isosceles and right-triangular elements of equal contact length and height are compared from 53 to 67 GHz in full-wave openEMS simulations including the waveguide-to-rod transitions. The rectangle peaks sharply at the rule, reaching 15.9 dBi. The right triangle keeps its gain within 0.7 dB and its side lobes at least 10 dB down over a two-to-one height range. At the rule, both outperform the isosceles element by 1.2 to 2.1 dB, and all remain matched.
ER -