• Shielding and Radiation Characteristics of Cylindrical Layered Bianisotropic Structures 

    Vegni, L.; Toscano, A. (Společnost pro radioelektronické inženýrství, 2005-12)
    In this paper we propose an analytical study in the spectral domain of cylindrical layered structures filled with general bianisotropic media and fed by a 3D electric source. The integrated structure is characterized in ...
  • 60 GHz Band Propagation Experiments on Terrestrial Paths in Sydney and Praha 

    Timms, G.; Kvicera, V.; Grabner, M. (Společnost pro radioelektronické inženýrství, 2005-12)
    Two studies of the outdoor propagation of 60 GHz microwaves are described. The focus of this paper is the relationship between rainfall and measured attenuation of the microwave signal. Experimental data are presented and ...
  • Seven State PTP for Vector Network Analyzer 

    V. Zavodny, K. Hoffmann, Z. Skvor (Společnost pro radioelektronické inženýrství, 2005-12)
    A new, seven-state switched perturbation two-port (PTP) for vector reflection measurement based on scalar measurement only was designed and realized in microstrip structure using PIN diodes. The structure was experimentally ...
  • Collinear Microstrip Patch Antenna 

    Polivka, M.; Holub, A.; Mazanek, M. (Společnost pro radioelektronické inženýrství, 2005-12)
    The paper presents a brief overview of the development of so called collinear types of antenna arrays. A new type of this structure in microstrip technology is further introduced. The principle of the antenna operation is ...
  • Assembly Influence on the Small-Signal Parameters of a Packaged Transistor 

    Sokol, V.; Cerny, P.; Hoffmann, K.; Skvor, Z. (Společnost pro radioelektronické inženýrství, 2005-12)
    A detailed analysis of the assembly influence on the small-signal parameters of a packaged transistor is presented. A new method, based on 3D field simulation and mixed-mode scattering parameters approach is proposed. ...
  • Simulation of a Broadband Antenna with the Method of Moments 

    Januszkiewicz, L.; Czarnecki, M. (Společnost pro radioelektronické inženýrství, 2005-12)
    In the paper selected problems of computer simulations of a broadband antenna containing large metallic surfaces with the Method of Moments have been discussed. A novel broadband combined spiral-discone antenna, built of ...
  • Radiation Pattern Reconstruction from the Near-Field Amplitude Measurement on Two Planes Using PSO 

    Tkadlec, R.; Novacek, Z. (Společnost pro radioelektronické inženýrství, 2005-12)
    The paper presents a new approach to the radiation pattern reconstruction from near-field amplitude only measurement over a two planar scanning surfaces. This new method for antenna pattern reconstruction is based on the ...
  • Antenna Measurements Using the Mirror Method with Gating in a Time Domain 

    Bartik, H. (Společnost pro radioelektronické inženýrství, 2005-12)
    This paper provides a principal overview of the time domain measurement instrumentation and information about the implementation of the time domain option in the Agilent PNA microwave network analyzer E8364A. The paper ...
  • Microwave Antennas and Circuits Modeling Using Electromagnetic Field Simulator 

    Hazdra, P.; Polivka, M.; Sokol, V. (Společnost pro radioelektronické inženýrství, 2005-12)
    Electromagnetic field simulators have become a widely used tool in a design process of microwave circuits and systems. A proper usage of electromagnetic (EM) field simulators allows substantial reduction of the design time ...
  • BER and SIR Based Hybrid Link Algorithms Performance in Mobile Radio Channel 

    Wieser, V.; Psenak, V. (Společnost pro radioelektronické inženýrství, 2005-12)
    In the next generation of mobile communication networks (B3G) the using of effective handling of radio resources is supposed (channels, power and transmission rate) with simultaneous delivery of required services, in which ...
  • New Planar and Volume Versions of a Metamaterial 

    Machac, J.; Hudlicka, M.; Buchar, P.; Zehentner, J. (Společnost pro radioelektronické inženýrství, 2005-12)
    Some characteristics of materials with negative permittivity and permeability, i.e., with a negative refrative index, known as metamaterials, are presented in this paper. Dispersion characteristics of left-handed parallel ...
  • Design Considerations of an Active Integrated Antenna with Negative Resistance Transistor Oscillator 

    Bonefacic, D.; Bartolic, J. (Společnost pro radioelektronické inženýrství, 2005-12)
    The design of an active integrated antenna with negative resistance transistor oscillator has been described. Simple but reasonably accurate analysis of oscillation start-up and steady state operating frequency prediction ...
  • Simulation of UMTS Capacity and Quality of Coverage in Urban Macro- and Microcellular Environment 

    Holis, J.; Pechač, Pavel (Společnost pro radioelektronické inženýrství, 2005-12)
    This paper deals with simulations of a radio interface of third generation (3G) mobile systems operating in the WCDMA FDD mode including propagation predictions in macro and microcells. In the radio network planning of 3G ...
  • Multi-Band Planar Antennas: a Comparative Study 

    Cap, A.; Raida, Zbyněk; de las Heras Palmero, E.; Lamadrid Ruiz, R. (Společnost pro radioelektronické inženýrství, 2005-12)
    The classical patch antenna is a basic building block of compared antennas. The multi-band behavior is achieved by etching perturbation slots to the patch, which influence resonant current distributions. The antennas are ...
  • Broadband Analysis of Microwave Structures by Enhanced Finite-Element Methods 

    Motl, M.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2005-12)
    The paper deals with the broadband modeling of microwave structures by finite-element methods. The attention is turned to original enhancements of accuracy, efficiency and stability of finite-element codes. The partial ...
  • Multi-Objective Optimization of Wire Antennas: Genetic Algorithms Versus Particle Swarm Optimization 

    Lukes, Z.; Raida, Zbyněk (Společnost pro radioelektronické inženýrství, 2005-12)
    The paper is aimed to the multi-objective optimization of wire multi-band antennas. Antennas are numerically modeled using time-domain integral-equation method. That way, the designed antennas can be characterized in a ...
  • Tropospheric Refraction Modeling Using Ray-Tracing and Parabolic Equation 

    Valtr, P.; Pechač, Pavel (Společnost pro radioelektronické inženýrství, 2005-12)
    Refraction phenomena that occur in the lower atmosphere significantly influence the performance of wireless communication systems. This paper provides an overview of corresponding computational methods. Basic properties ...