Antennas, EMC and simulation of electromagnetic fields
Department of Electromagnetic Field, Technická 2, Praha 6, 166 27
prof. Miloš Mazánek, firstname.lastname@example.org, +420 2 2435 2282
Main coordinator of R&D activities in the field of antennas and EMC.
Specializes in accurate antenna measurement.
Focused on planar, multiband, and miniaturized antennas for communication and RFID purposes.
Design of broadband antenna structures (mainly horn-type) and components, antenna measurement.
Involved in MATLAB programming, development of numerical codes for modeling and optimization of antennas.
Interested in CST modeling of antennas and coding in MATLAB.
Interested in low profile solutions of RFID tag antennas for wearable purposes and identification of people.
Deals with wideband and lens antennas, design and optimization of microwave planar circuits, millimeter-wave measurements, quasioptics and microwave spectroscopy.
Electromagnetic compatibility (EMC), shielding effectiveness measurement and accurate antenna measurement.
Design of UWB antennas and systems, microwave circuit design and measurement, milimeter-wave techniques.
Small antennas, Theory of characteristic modes, reflector antennas, antenna theory and simulation.
Design of special prime-focus feeders for reflector antenna systems, mainly for EME (Earth-Moon-Earth) communication purposes.
Is interested in general antenna design, especially in planar structures. Alois is our external collaborator.
We are focused on design and development of broad range of antenna types for various purposes: wire, microstrip, fractal, horn, spiral, antennas for UWB, special feeders for reflector systems.
Modern development of antennas and microwave circuits is not possible to perform without sophisticated design tools like EM field simulators. We use IE3D, AWR Microwave Office, CST Microwave Studio and FEKO.
Antenna prototypes are manufactured either by ourselves or by third parties. We own our photo-etching technology lab, antenna anechoic chamber with standard measurement equipment (NSA) for frequency range 100 MHz - 40 GHz and in selected bands up to 110 GHz.
In the field of EMC we are specialized in shielding efficiency of anechoic chambers, especially "small" chambers (with the size lower then 2m).
Currently we expand our activities into the field of electromagnetic immunity measurement. We built low frequency anechoic chamber with feritte absorbers for the range 50 MHz up to 1 GHz.
What is it good for?
Antenna is a key element of wireless communication chain serving as a transformer between guided and radiated waves. Simply, antenna is a special space-frequency filter necessary for efficient wireless transfer of electromagnetic energy. Immunity against unwanted electromagnetic interference is important aspect of this transfer.
What we are working on?
Simulation and visualization of electromagnetic fields
- Simulation and visualisation of electromagnetic fields enable not only to analyse and optimize antennas and microwave components but also obtain physical insight into the structure behaviour especially with the help of current and field visualization.
Development of MATLAB numerical codes for modeling and optimization of antennas
- Generator of planar fractal structures IFSMaker
- Characteristic mode analyzer for 3D RWG structures, Q-factor calculation, radiation efficiency, optimization of antenna parameters on the basis of characteristic modes and MoM
- Evaluation of antenna noise temperature for low-noise space communication
Planar (microstrip) antennas
- Design of printed (microstrip) antennas according to specific requirements (multiband, broadband, enhanced gain, etc.), optimization (genetic and evolutionary algorithms, PSO)
- Analysis of planar antennas using modern EM field simulators (IE3D, FEKO, CST), modal analysis (Theory of characteristic modes)
- Study of novel antenna types (colinear arrays, fractal geometry antennas, electrically small antennas)
- Low-profile RFID sensors working in complex environment
Broadband antenna structures and transitions
- Spiral antennas
- Broadband horn antennas (double - ridged horn)
- Broadband horn antennas with dual polarization ability H/V, RHC/LHC
Electromagnetic compatibility (EMC)
- Shielding efficiency simulation and measurement
- Simulation of electrically small shielded chambers
- Electromagnetic immunity (EMI)
Special prime feeders and simulation of reflector antennas
- Prime focus feeders with special low-noise and polarization properties, septum polarizers
- Simulation of electrically large structures and reflector systems, antenna and system noise calculations
- Measurement of antenna parameters (NSA system)
- Antenna anechoic chamber
Sponsors of our research
Selected research projects and supporting agencies
- International support - Network of Excelence in the frame of 6. Framework programme EU - Antenna Centre of Excelence (2006-07), Project COST IC0603 (2007-2010) - Antenna Systems & Sensors for Information Society Technologies (ASSIST), IC0803 (2008-2012) - RF/Microwave Communication Subsystems for Emerging Wireless Technologies (RFCSET)
- National grant agencies and government departments - Czech National Science Foundations GA ČR, Ministry of education (MSMT), Ministry of defence (MO), Ministry of Industry nad Trade, National Security Office (NBÚ)
- Research center KVASTES - Centre for kvasioptical systems and terahertz spectroscopy
- University local support - projects of Fund of University Development
- More then 50 university and company partners in Europe in the frame of COST actions
- We are founding partner of European Association on Antennas and Propagation (EurAAP)
- Local National Security Office
- Radioengineering journal
- European School of Antennas (ESoA)
- Holub, A., Polívka, M. (2010). Collinear Microstrip Patch Antennas, Passive Microwave Components and Antennas, Vitaliy Zhurbenko (Ed.), ISBN: 978-953-307-083-4, InTech, Available from: http://www.intechopen.com/articles/show/title/collinear-microstrip-patch-antennas.
- Polívka, M., Švanda, M., Hudec, P. (2009). UHF RFID of People, Development and Implementation of RFID Technology, Cristina Turcu (Ed.), ISBN: 978-3-902613-54-7, InTech, Available from: http://www.intechopen.com/articles/show/title/uhf_rfid_of_people.
- Piksa, P., Zvánovec, S., Černý, P. Specific Millimeter-Wave Features of Fabry-Perot Resonator for Spectroscopic Measurements, In-Tech, 2010, p. 451-468, ISBN 978-953-7619-66-4, Available from: http://www.intechopen.com/articles/show/title/specific-millimeter-wave-features-of-fabry-perot-resonator-for-spectroscopic-measurements
- Švanda, M. - Polívka, M.: Horizontal Five-arm Folded Dipole over Metal Screening plane for UHF RFID of Dielectric Objects. Microwave and Optical Technology Letters. 2010, vol. 52, no. 10, p. 2291-2294. ISSN 0895-2477.
- Švanda, M. - Polívka, M.: Two Novel Extremely Low-Profile Slot-Coupled Two-Element Patch Antennas for UHF RFID of People. Microwave and Optical Technology Letters. 2010, vol. 52, no. 2, p. 249-252. ISSN 0895-2477.
- Polívka, M., Švanda, M., Hudec, P., Zvánovec, S., UHF Radiofrequency Identification of People in Indoor and Open Areas, Trans. on Microwave Theory and Technique, Special Issue on Hardware and Integration Challenges of RFID's, 2009, vol. 57, no. 5, p. 1341-1347. ISSN 0018-9480.
- Švanda, M., Polívka, M., Novel Dual-loop antenna Placed over Patch Array Surface for UHF RFID of Dielectric and Metallic Objects. Microwave and Optical Technology Letters. 2009, vol. 51, no. 3, p. 709-713. ISSN 0895-2477.
- Holub, A., Polívka, M.: Vertically Meander-Folded, Shorted-Patch Antennas. Microwave and Optical Technology Letters. 2009, vol. 51, no. 12, p. 2938-2942. ISSN 0895-2477.
- Čapek, M. - Hazdra, P. - Hamouz, P. - Eichler, J: A method for tracking characteristic numbers and vectors, Progress In Electromagnetics Research B, Vol. 33, 115-134, 2011.
- Čapek, M. - Hazdra, P. - Hamouz, P. - Mazánek, M.: Software Tools for Efficient Generation, Modeling and Optimisation of Fractal Radiating Structures. IET Microwaves, Antennas & Propagation. 2011, vol. 5, no. 8, p. 1002-1007. ISSN 1751-8725.
- Hazdra, P. - Čapek, M. - Eichler, J.: Radiation Q-Factors of Thin-Wire Dipole Arrangements. IEEE Antennas and Wireless Propagation Letters. 2011, vol. 10, p. 556-560. ISSN 1536-1225.
- Kraček, J. - Mazánek, M.: Possibilities of Wireless Power Supply. International Journal of Microwave and Wireless Technologies . 2010, vol. 2, no. 2, p. 153-157. ISSN 1759-0787.
- Černý, P. - Nevrlý, J. - Mazánek, M.: Distortion Minimization of Radiated Impulses of Tapered Slot Vivaldi Antenna for UWB Application. Automatika. 2008, vol. 49, no. 1-2, p. 45-50. ISSN 0005-1144.
- Černý, P. - Mazánek, M.: Optimization of Transient Response Radiation of Printed Ultra Wideband Dipole Antennas (Using Particle Swarm Optimization Method). Radioengineering. 2007, vol. 16, no. 2, p. 9-14. ISSN 1210-2512.
- Hazdra, P. - Mazánek, M. - Čermák, J.: Wideband Rectangular Microstrip Patch Antenna. Radioengineering. 2007, vol. 16, no. 3, p. 37-41. ISSN 1210-2512.
- Kořínek, T. - Piksa, P. - Mazánek, M.: Wideband Measurement in a Small Shielded Box Using Equiangular Spiral Antennas. Radioengineering. 2006, vol. 15, no. 4, p. 34-37. ISSN 1210-2512.
- Piksa, P. - Mazánek, M.: A Self-Complementary 1.2 to 40 GHz Spiral Antenna with Impedance Matching. Radioengineering. 2006, vol. 15, no. 3, p. 15-19. ISSN 1210-2512.
- Ferrero, F. - Diallo, A. - Luxey, C. - Derat, B. - Hamouz, P. - et al.: Two-Element PIFA Array Structure for Polarization Diversity in UMTS Mobile Phones. Radioengineering. 2009, vol. 2009, no. 4, p. 407-412. ISSN 1210-2512.
- Hazdra, P. - Hamouz, P.: On the Modal Superposition Lying under the MoM Matrix Equations. Radioengineering. 2008, vol. 17, no. 3, p. 42-46. ISSN 1210-2512.
- Piksa, P., Zvánovec, S., Černý, P. Elliptic and Hyperbolic Dielectric Lens Antennas in mm-Waves, In: Radioengineering. 2011, vol. 20, no. 1, p. 270-275. ISSN 1210-2512.
- Zvánovec, S., Piksa, P., Mazánek, M., Pechač, P. A Study of Gas and Rain Propagation Effects at 48GHz for HAP Scenarios In: EURASIP Journal on Wireless Communications and Networking [online]. 2008, vol. 5, no. 1, p. 1-7. Internet: http://www.hindawi.com/GetArticle.aspx?doi=10.1155/2008/734216. ISSN 1687-1499.