Selective mode suppression in microstrip differential lines by means of electric-LC (ELC) and magnetic-LC (MLC) resonators
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In this paper, it is demonstrated that the so-called electric-LC (ELC) resonators, and their dual counterparts, the magnetic-LC (MLC) resonators, are useful for the selective suppression of either the differential or the common mode in microstrip differential lines. The key point to mode suppression is the alignment of the resonator with the electric (differential mode) or magnetic (common mode) wall of the line. It is shown that by simply rotating the resonators 90∘ we can selectively choose the suppressed mode in the vicinity of the resonator’s fundamental resonance frequency. The theory is validated through full-wave electromagnetic simulation, the lumped element equivalent circuit models of the proposed structures and experimental data.
KeywordsSymmetry Plane Ground Plane Common Mode Magnetic Coupling Equivalent Circuit Model
This work has been supported by MICIIN-Spain (projects TEC2010-17512, CSD2008-00066, and TEC2011-13615-E) and by AGAUR-Generalitat de Catalunya, through project 2009SGR-421. Jordi Naqui feels also indebted to MECD (Spain) for supporting his work through the FPU grant AP2010-0431.
- 3.R. Marqués, F. Martín, M. Sorolla, Metamaterials with Negative Parameters: Theory, Design and Microwave Applications (Wiley, New York, 2008) Google Scholar
- 5.J. Naqui, A. Fernández-Prieto, M. Durán-Sindreu, F. Mesa, J. Martel, F. Medina, F. Martín, Common mode suppression in microstrip differential lines by means of complementary split ring resonators: theory and applications. IEEE Trans. Microw. Theory Tech. 60, 3023–3034 (2012) ADSCrossRefGoogle Scholar
- 14.J. Naqui, M. Durán-Sindreu, F. Martín, Transmission lines loaded with bisymmetric resonators and applications, in IEEE MTT-S Int. Microwave Symp., Seattle USA, June 2013 Google Scholar