TY - JOUR
T1 - On one- and two-dimensional electromagnetic band gap structures in rectangular waveguides at microwave frequencies
AU - Gómez, Álvaro
AU - Vegas, Angel
AU - Solano, Miguel A.
AU - Lakhtakia, Akhlesh
N1 - Funding Information:
Keywords electromagnetic band gaps, periodic structures, electromagnetic propagation, coupled mode method, mode matching method Received 31 October 2004; accepted 16 December 2004. This work was supported by the Dirección General de Investigación of the Spanish MEC, under project TIC2003-09677-C03-01. Address correspondence to Miguel A. Solano, Universidad de Cantabria, Depto. de Inge-niería de Comunicaciones, Avda. de los Castros s/n, Santander, Cantabria 39005, Spain. E-mail: [email protected]
PY - 2005/7
Y1 - 2005/7
N2 - Electromagnetic band gap (EBG) structures of two different configurations implemented inside R120 rectangular waveguides (frequency range 10-15 GHz) are examined. The first configuration has a periodic, piecewise uniform variation of permittivity in the propagation direction. Two types of such one-dimensional (1D) EBG structures are analyzed, one with the unit cell comprising two dielectric layers, the other with three dielectric layers per unit cell. The second configuration is two-dimensional, with the unit cell along the propagation direction containing two sections, each of which is made of alternating pillars of two dielectric materials. The Block theorem is invoked for the ideal EBG structures, which are infinitely long in the propagation direction. The mode-matching method (MMM) is used for real 1D-EBG structures, which contain a finite number of unit cells, whereas a combination of the coupled-mode method (CMM) and the MMM is used for real 2D-EBG structures. Spectrums of the transmission coefficient of the fundamental mode for the 1D-EBG structures are computed and shown to compare favorably against experimental data. The effect of inserting a defect in 1D-EBG structures is demonstrated theoretically as well as experimentally. The band gaps computed for real and ideal 2D-EBG structures are compared as well.
AB - Electromagnetic band gap (EBG) structures of two different configurations implemented inside R120 rectangular waveguides (frequency range 10-15 GHz) are examined. The first configuration has a periodic, piecewise uniform variation of permittivity in the propagation direction. Two types of such one-dimensional (1D) EBG structures are analyzed, one with the unit cell comprising two dielectric layers, the other with three dielectric layers per unit cell. The second configuration is two-dimensional, with the unit cell along the propagation direction containing two sections, each of which is made of alternating pillars of two dielectric materials. The Block theorem is invoked for the ideal EBG structures, which are infinitely long in the propagation direction. The mode-matching method (MMM) is used for real 1D-EBG structures, which contain a finite number of unit cells, whereas a combination of the coupled-mode method (CMM) and the MMM is used for real 2D-EBG structures. Spectrums of the transmission coefficient of the fundamental mode for the 1D-EBG structures are computed and shown to compare favorably against experimental data. The effect of inserting a defect in 1D-EBG structures is demonstrated theoretically as well as experimentally. The band gaps computed for real and ideal 2D-EBG structures are compared as well.
UR - https://www.scopus.com/pages/publications/22944435507
UR - https://www.scopus.com/pages/publications/22944435507#tab=citedBy
U2 - 10.1080/02726340590957443
DO - 10.1080/02726340590957443
M3 - Article
AN - SCOPUS:22944435507
SN - 0272-6343
VL - 25
SP - 437
EP - 460
JO - Electromagnetics
JF - Electromagnetics
IS - 5
ER -