Multiband High-Order Bandstop 3-D Frequency-Selective Structures
- 25 March 2016
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Antennas and Propagation
- Vol. 64 (6), 2217-2226
- https://doi.org/10.1109/tap.2016.2546967
Abstract
A general methodology for the design of multiband high-order three-dimensional (3-D) frequency-selective structures (FSSs) is proposed. The methodology is based on employing multiple resonators inside a unit cell (UC) to obtain a multiband response, and by controlling the coupling between identical resonators, a high-order filtering performance is achieved. This provides more transmission zeros in the operating bands, which lead to improved bandwidth and high selectivity. Detailed analysis for the coupling between identical resonators is provided as well as equivalent circuit models to explain the operating principle. Three structures are designed, fabricated, and measured to verify the proposed methodology. The first structure is a triband secondorder FSS with center frequencies at 9.6, 13.4, and 17.5 GHz and their -3-dB fractional bandwidths of 13.5%, 8.5%, and 12.6%, respectively. The second structure is designed to have a dualband third-order response with center frequencies at 13.2 and 19.6 GHz and their -3-dB fractional bandwidths of 16% and 13.3%, respectively. The last structure is designed to exhibit a dual-band second-order response under both TE and TM polarizations with center frequencies at 11.2 and 13.8 GHz and -3-dB fractional bandwidths of 5.5% and 4%, respectively.This publication has 19 references indexed in Scilit:
- General expressions and physical origin of the coupling coefficient of arbitrary tuned coupled electromagnetic resonatorsJournal of Applied Physics, 2015
- Dual-Band Bandpass Frequency-Selective Structures With Arbitrary Band RatiosIEEE Transactions on Antennas and Propagation, 2014
- An overview of three-dimensional frequency-selective structuresIEEE Antennas and Propagation Magazine, 2014
- Three-Dimensional Bandpass Frequency-Selective Structures With Multiple Transmission ZerosIEEE Transactions on Microwave Theory and Techniques, 2013
- Gap Discontinuity in Microstrip Lines: An Accurate Semianalytical FormulationIEEE Transactions on Microwave Theory and Techniques, 2011
- A Generalized Synthesis Procedure for Low-Profile, Frequency Selective Surfaces With Odd-Order Bandpass ResponsesIEEE Transactions on Antennas and Propagation, 2010
- A Novel Band-Reject Frequency Selective Surface With Pseudo-Elliptic ResponseIEEE Transactions on Antennas and Propagation, 2010
- Coupling coefficient of resonators—An intuitive way of its understandingElectronics and Communications in Japan (Part II: Electronics), 2007
- Coupled-mode theoryProceedings of the IEEE, 1991
- Equivalent Capacitances for Microstrip Gaps and StepsIEEE Transactions on Microwave Theory and Techniques, 1972