Sat, 26 Jul 2008 06:09:41 BST CiteULike: dcastro's ebg http://www.citeulike.org/user/dcastro/tag/ebg CiteULike.org en-gb Copyright © 2004-2008 citeulike.org http://www.citeulike.org/user/dcastro/article/2782046 <i>Microwave Theory and Techniques, IEEE Transactions on, Vol. 50, No. 11. (2002), pp. 2624-2628.</i><br /><br />Wave propagation along the finite-width conductor-backed coplanar waveguide (FW-CBCPW) with periodically loaded one-dimensional electromagnetic bandgap (EBG) cells proposed earlier by the authors is investigated theoretically and experimentally in this paper. The full-wave simulation in conjunction with Floquet's theorem is employed to find the dispersion diagram for characterizing the guided and leaky waves over a wide frequency range. For examining the guided-wave mode, the equivalent-circuit model is established to obtain the analytical formula of the Bloch impedance. The remarkable slow-wave factor 1.9-2.9 times higher than that of a conventional FW-CBCPW is presented. When operating frequency is sufficiently high, the leaky-wave mode is emitted so that the structure radiates in the backward direction. Good agreement among the results of the full-wave simulation, equivalent-circuit model, published data, and measurement supports the usefulness of the proposed full-wave simulation and also validates the analytical formula. By properly adjusting the circuit configuration, the periodic EBG structure with controllable propagation characteristics, which include the bandgap zone, the slow-wave factor, and the Bloch impedance for the guided wave, as well as the radiation main beam for the leaky wave, may be achieved. Propagation characteristics of finite-width conductor-backed coplanar waveguides with periodic electromagnetic bandgap cells Shau-Gang Mao Ming-Yi Chen doi:10.1109/TMTT.2002.804515 Microwave Theory and Techniques, IEEE Transactions on, Vol. 50, No. 11. (2002), pp. 2624-2628. 2008-05-09T23:55:59-00:00 2002 Microwave Theory and Techniques, IEEE Transactions on 50 11 2624 2628 ebg periodic propagation http://www.citeulike.org/user/dcastro/article/2782045 <i>Microwave and Wireless Components Letters, IEEE, Vol. 11, No. 6. (2001), pp. 261-263.</i><br /><br />The one-dimensional (1-D) periodic electromagnetic bandgap (EBG) structure for the finite-width conductor-backed coplanar waveguide (FW-CBCPW) is proposed. Unlike the conventional EBG structures for the microstrip line and the coplanar waveguide (CPW), which are typically placed on one of the signal strips and the ground plane, this EBG cell is etched on both the signal strip and the upper ground plane of FW-CBCPW resulting in a novel circuit element. The equivalent circuit is also used to model the EBG cell. Measured and full-wave simulated results show that the cell exhibits remarkable stopband effect. The low-pass filter with lower cutoff frequency and wider rejection bandwidth is constructed from a serial connection of the EBG cells. The effect of back metallization on the guiding characteristic is also discussed. Compared to the published EBG cells, the proposed structure has the advantages of relative flexibility, higher compactness, lower radiation loss, and easier integration with the uniplanar circuits A novel periodic electromagnetic bandgap structure for finite-width conductor-backed coplanar waveguides Shau-Gang Mao Ming-Yi Chen doi:10.1109/7260.928932 Microwave and Wireless Components Letters, IEEE, Vol. 11, No. 6. (2001), pp. 261-263. 2008-05-09T23:55:57-00:00 2001 Microwave and Wireless Components Letters, IEEE 11 6 261 263 ebg periodic structure