TY - JOUR
T1 - Waveguide Dispersion Tailoring by Using Embedded Impedance Surfaces
AU - He, Yijing
AU - Li, Yue
AU - Zhu, Liang
AU - Bagci, Hakan
AU - Erricolo, Danilo
AU - Chen, Pai Yen
N1 - Publisher Copyright:
© 2018 American Physical Society.
PY - 2018/12/11
Y1 - 2018/12/11
N2 - The capability to tailor the dispersion and the cut-off frequency of waveguides is of importance, as these essential parameters govern the operating frequency range and the waveguide dimension. Here, we propose the concept of substrate-integrated impedance surface (SIIS) that enables arbitrary control of propagation characteristics of closed-shape waveguides. Specifically, we develop a theoretical framework for the simplest form of SIIS constituted by a one-dimensional array of blind vias, which is equivalent to a homogenized surface capacitance embedded in the waveguide. We theoretically and experimentally demonstrate that loading a substrate-integrated waveguide (SIW) with a capacitive SIIS can effectively reduce its cut-off frequency, regardless of the transverse dimension of the SIW. In addition, a SIIS-loaded SIW exhibits several intriguing phenomena, such as the slow-wave guiding properties and the local field concentration. This SIIS-loading technique may open up new possibilities for miniaturization of various waveguide-based components and for enhancement of their uses in microwave sensing and nonlinear functions.
AB - The capability to tailor the dispersion and the cut-off frequency of waveguides is of importance, as these essential parameters govern the operating frequency range and the waveguide dimension. Here, we propose the concept of substrate-integrated impedance surface (SIIS) that enables arbitrary control of propagation characteristics of closed-shape waveguides. Specifically, we develop a theoretical framework for the simplest form of SIIS constituted by a one-dimensional array of blind vias, which is equivalent to a homogenized surface capacitance embedded in the waveguide. We theoretically and experimentally demonstrate that loading a substrate-integrated waveguide (SIW) with a capacitive SIIS can effectively reduce its cut-off frequency, regardless of the transverse dimension of the SIW. In addition, a SIIS-loaded SIW exhibits several intriguing phenomena, such as the slow-wave guiding properties and the local field concentration. This SIIS-loading technique may open up new possibilities for miniaturization of various waveguide-based components and for enhancement of their uses in microwave sensing and nonlinear functions.
UR - http://www.scopus.com/inward/record.url?scp=85058318921&partnerID=8YFLogxK
U2 - 10.1103/PhysRevApplied.10.064024
DO - 10.1103/PhysRevApplied.10.064024
M3 - Article
AN - SCOPUS:85058318921
SN - 2331-7019
VL - 10
JO - Physical Review Applied
JF - Physical Review Applied
IS - 6
M1 - 064024
ER -