Publikační činnost - 13117
Zobrazují se záznamy 41-58 z 58
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Waveguide bandpass filters with attenuation of higher-order passbands
(IEEE, 1993-09)A new method is proposed to provide additional attenuation to higher-order passbands of metal waveguide bandpass filters. To this end, shunt waveguide sections with cut-off frequencies are included into the filter structure. ... -
Analysis of discontinuities in waveguiding structures by MAB method
(IEEE, 1992-08)The method of minimal autonomous blocks (MAB) is briefly described. A universal code computing reflectivity and transmissivity of discontinuities in waveguide structures was developed on the basis of the MAB method. This ... -
Upper Cut-Off Frequency of the Bound Wave and New Leaky Wave on the Slotline
(IEEE, 1997-06)This paper contributes to a more profound understanding of uniplanar circuit behaviour. A simple closed-form formula providing the upper cut-off frequency of the bound wave propagating over the slotline is presented. A new ... -
Spurious leaky mode solutions and experimental verification of the second leaky wave
(IEEE, 1999)This paper presents the revelation of spurious leaky mode solutions of the dispersion equation, and experimental confirmation of the occurrence of the second leaky wave on the slotline. The appearance of the spurious ... -
Evolution of New Real and Complex Improper Solutions of the Slotline Dispersion Equation
(IEEE, 1997-09)An attempt is made in this paper to reach a better understanding of the behaviour of open uniplanar circuits, particularly the slotline. A new second leaky wave has been revealed in addition to the dominant bound and leaky ... -
Performance of the slotline in the mm-wave range
(IEEE, 1998-05)This paper deals with an investigation of the dispersion characteristics of the slotline in the mm-wave range. Attention is paid to the possible excitation of the surface leaky waves on the slotline. Higher order leaky ... -
Static model of DH laser
(IEEE, 1983-04)A method of complex analysis of the double-heterostructure stripe-geometry laser, based on a new static model, is presented. The optical field distribution in the active region of the laser is described by the wave equation. ... -
Effect of feedback carrier excitation on LED external quantum efficiency
(IEEE, 1982-02)Self-absorption of photons generated by prior luminescence processes affects both the steady-state and transient characteristics of LEDs. In this study we confine ourselves to one of the most important steadystate ... -
Active Resonator
(IEEE, 2001-07)A new electrical component-active resonator-is designed. The component consists of a common passive resonant circuit whose losses are compensated by an extra active circuit. Experimental verification was done with a TE/sub ... -
First results of microwave measurement of broadband radio interference filters
(IEEE, 2004-12)A vector measurement method for testing multiport interference filters for shielded chambers has been used. Measured data up to 3 GHz are presented. The authors believe that this is the first time such results have been published. -
Stability of FDTD in Curvilinear Coordinates
(IEEE, 2001-07)A new approach suitable for determination of the maximal stable time step for the finite-difference time domain (FDTD) algorithm in curvilinear coordinates is presented. It is based on a modified variable separation method, ... -
A New Concept of PTP Vector Network Analyzer
(IEEE, 2004-12)A new concept for vector network analyzers design based on a perturbation two-port (PTP) is presented. The approach uses redundant states of the PTP. The best states of the PTP for a certain place in Smith chart and frequency ... -
On radio interference filter measurement
(IEEE, 2003-12)A new measurement method for on site testing of multiport radio interference filters (RIF) on shielded chamber is designed. The method is based on scalar measurement only and makes possible a pessimistic estimate of the ... -
Evaluation and Correction of Cable Phase Stability in High Frequency Near-Field Measurement
(IEEE, 2008-04)In case of the near-field measurement, the radiated field by the measured antenna is received by two- dimensional scanner in defined points. During the process of the field scanning, the cable between the VNA and the scanner ... -
Wideband VIP power divider with differential output
(IEEE, 2003-12)A novel wideband VIP power divider with out of phase outputs was designed and experimentally verified. The phase difference 180° ±5° and the amplitude difference ± 0.8 dB of output signals were achieved in 4-26 GHz frequency ... -
Hidden Problems in Precise Calibration on Microstrip
(IEEE, 2008-12)A study of calibration problems on microstrip with respect to interaction of electromagnetic fields around SMA to microstrip launcher and microstrip short was carried out in frequency band up to 26 GHz. Omni Spectra SMA ... -
A novel vector network analyzer
(IEEE, 1998-12)A calibration procedure for a perturbation two-port vector network analyzer is presented. It consists of a variable perturbation two-port placed between a device-under-test and a scalar network analyzer. A measured vector ... -
The Distributed Oscillator at 4 GHz
(IEEE, 1998-12)This paper describes the design and experimental verification of a tunable oscillator based on a microwave distributed amplifier. The oscillator met design expectations, being capable of continuous tuning over the range ...
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