Incident angle-dependent effective surface impedance (ZS) of electromagnetic crystal (EMXT)

Hao Xin; M. Kim; J. B. Hacker; J. A. Higgins

doi:10.1109/LMWC.2004.832077

Incident angle-dependent effective surface impedance (Z_S) of electromagnetic crystal (EMXT)

Hao Xin, M. Kim, J. B. Hacker, J. A. Higgins

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

Electromagnetic crystal (EMXT) surfaces are modeled with effective surface impedance method. Effects of oblique incidence are studied using a technique similar to the waveguide simulator method for analyzing infinite phased array. Numerical results are compared with an analytical model. EMXT samples are characterized by open-ended waveguide reflection measurements using different aperture sizes (WR28 and WR22). The measurements confirm the angular dependence of the EMXT surface impedance. A rectangular waveguide with EMXT sidewalls is modeled by using the angle-dependent effective surface impedance as the sidewall boundary condition. Excellent agreement between this model and full-wave finite-element simulation of the entire waveguide structure is obtained.

Original language	English
Pages (from-to)	437-439
Number of pages	3
Journal	IEEE Microwave and Wireless Components Letters
Volume	14
Issue number	9
DOIs	https://doi.org/10.1109/LMWC.2004.832077
Publication status	Published - 2004 Sept

Keywords

Electromagnetic crystal (EMXT) surfaces
Infinite phased array
Surface impedance

ASJC Scopus subject areas

Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1109/LMWC.2004.832077

Cite this

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title = "Incident angle-dependent effective surface impedance (ZS) of electromagnetic crystal (EMXT)",

abstract = "Electromagnetic crystal (EMXT) surfaces are modeled with effective surface impedance method. Effects of oblique incidence are studied using a technique similar to the waveguide simulator method for analyzing infinite phased array. Numerical results are compared with an analytical model. EMXT samples are characterized by open-ended waveguide reflection measurements using different aperture sizes (WR28 and WR22). The measurements confirm the angular dependence of the EMXT surface impedance. A rectangular waveguide with EMXT sidewalls is modeled by using the angle-dependent effective surface impedance as the sidewall boundary condition. Excellent agreement between this model and full-wave finite-element simulation of the entire waveguide structure is obtained.",

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AU - Xin, Hao

AU - Kim, M.

AU - Hacker, J. B.

AU - Higgins, J. A.

PY - 2004/9

Y1 - 2004/9

N2 - Electromagnetic crystal (EMXT) surfaces are modeled with effective surface impedance method. Effects of oblique incidence are studied using a technique similar to the waveguide simulator method for analyzing infinite phased array. Numerical results are compared with an analytical model. EMXT samples are characterized by open-ended waveguide reflection measurements using different aperture sizes (WR28 and WR22). The measurements confirm the angular dependence of the EMXT surface impedance. A rectangular waveguide with EMXT sidewalls is modeled by using the angle-dependent effective surface impedance as the sidewall boundary condition. Excellent agreement between this model and full-wave finite-element simulation of the entire waveguide structure is obtained.

AB - Electromagnetic crystal (EMXT) surfaces are modeled with effective surface impedance method. Effects of oblique incidence are studied using a technique similar to the waveguide simulator method for analyzing infinite phased array. Numerical results are compared with an analytical model. EMXT samples are characterized by open-ended waveguide reflection measurements using different aperture sizes (WR28 and WR22). The measurements confirm the angular dependence of the EMXT surface impedance. A rectangular waveguide with EMXT sidewalls is modeled by using the angle-dependent effective surface impedance as the sidewall boundary condition. Excellent agreement between this model and full-wave finite-element simulation of the entire waveguide structure is obtained.

KW - Electromagnetic crystal (EMXT) surfaces

KW - Infinite phased array

KW - Surface impedance

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JO - IEEE Microwave and Wireless Components Letters

JF - IEEE Microwave and Wireless Components Letters

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