| Título: | Synthesis of RF Circuits with Negative Time Delay by Using LNA |
| Autores: | Ravelo, Blaise; IRSEEM (Institut de Recherche en Systèmes Electroniques Embarqués), EA 4353, At the graduate school of engineering ESIGELEC, Avenue Galilée, BP 10024, 76801 Saint Etienne du Rouvray, France |
| Fecha: | 2013-07-24 |
| Publicador: | Advanced Electromagnetics |
| Fuente: |
 |
| Tipo: |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article |
| Tema: |
RF Circuits; LNA; Negative group delay; NGD |
| Descripción: | A demonstration of the negative time-delay by using active circuit topologies with negative group delay (NGD) is described in this paper. This negative time delay is realized with two different topologies operating in base band and modulated frequencies. The first NGD topology is composed of an RL-network in feedback with an RF/microwave amplifier. Knowing the characteristics of the amplifier, a synthesis method of this circuit in function of the desired NGD values and the expected time advance is established. The feasibility of this extraordinary physical effect is illustrated with frequency- and time-domain analyses. It is shown in this paper that by considering an arbitrary waveform signal, output in advance of about 7 ns is observed compared to the corresponding input. It is stated that such an effect is not in contradiction with the causality. The other NGD topology is comprised of a microwave amplifier associated with an RLC-series resonant. The theoretical approach illustrating the functioning of this NGD circuit is established by considering the amplifier S-parameters. Then, synthesis relations enabling to choose the NGD device parameters according to the desired NGD and gain values are also established. To demonstrate the relevance of the theoretic concept, a microwave device exhibiting NGD function of about -1.5 ns at around 1.19 GHz was designed and analyzed. The NGD device investigated in this paper presents advantages on its faculty to exhibit positive transmission gain, the implementation of the bias network and matching in the considered NGD frequency band. |
| Idioma: | Inglés |
1 On the Evaluation of the Shielding Effectiveness of Electrically Large Enclosure por Gifuni, Angelo; University of Parthenope,Sorrentino, Antonio; University of Parthenope,Fanti, Alessandro; University of cagliari,Ferrara, Giuseppe,Migliaccio, Maurizio; University of Parthenope,Mazzarella, Giuseppe; University of Cagliari,Corona, Federico; University of Parthenope | 6 Frequency Dependent Model of Leakage Inductance for Magnetic Components por Wilson, Peter R; School of Electronics and Computer Science
University of Southampton
Southampton
SO17 1BJ
United Kingdom |
2 Electromagnetic Absorbers based on High-Impedance Surfaces: From ultra-narrowband to ultra-wideband absorption por Costa, Filippo; University of Pisa, Department of Information Engineering, Via G. Caruso 16,
56122 Pisa, Italy,Monorchio, Agostino; University of Pisa, Department of Information Engineering, Via G. Caruso 16,
56122 Pisa, Italy | 7 Scattering forces on magneto-dielectric particles and the electromagnetic momentum density por Marques, Manuel I.; Universidad Autonoma de Madrid,Saenz, Juan J.; Universidad Autonoma de Madrid |
3 Novel antenna concepts via coordinate transformation por Tichit, Paul-Henri; Univ. Paris-Sud, CNRS,Burokur, Shah Nawaz; Univ. Paris-Sud, CNRS,Wu, Xinying; Univ. Paris-Sud, CNRS,Germain, Dylan; Univ. Paris-Sud, CNRS,de Lustrac, A.; IEF, Paris-Sud University | 8 Curvilinear vector finite difference approach to the computation of waveguide modes por Fanti, Alessandro; University of cagliari,Mazzarella, Giuseppe; University of cagliari,Montisci, Giorgio; University of cagliari |
4 Difficulties in teaching electromagnetism: an eight year experience at Pierre and Marie Curie University por Roussel, Hélène; UPMC, Univ. Paris 6,Hélier, Marc; UPMC, Univ. Paris 6 | 9 Roughness effect on the efficiency of dimer antenna based biosensor por Barchiesi, Dominique; University of technology of Troyes,Kessentini, Sameh; University of technology of Troyes |
5 Magnetic Shape Memory Alloys as smart materials for micro-positioning devices por Hubert, Arnaud; Institut Femto-ST, département AS2M
24 rue A. Savary
25000 Besancon,Calchand, Nandish; Institut Femto-ST, département AS2M
24 rue A. Savary
25000 Besancon,Le Gorrec, Yann; Institut Femto-ST, département AS2M
24 rue A. Savary
25000 Besancon,Gauthier, Jean-Yves; Laboratoire Ampère UMR 5005, Université de Lyon/CNRS
INSA LYON, bat. Saint-Exupery, Avenue Jean Capelle
69621 Villeurbanne Cedex | 10 Polarizability Matrix Extraction of a Bianisotropic Metamaterial from the Scattering Parameters of Normally Incident Plane Waves por Karamanos, Theodosios D.; Aristotle University of Thessaloniki,Dimitriadis, Alexandros I.; Aristotle University of Thessaloniki,Nikolaos V., Kantartzis; Aristotle University of Thessaloniki |