The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A multiconductor-transmission-line (MTL) model of the high-voltage dc power bus of electric vehicles (composed of two shielded cables running above a metallic ground) is proposed for the prediction of the propagation of conducted electromagnetic noise up to 100 MHz. Model parameters are computed by knowing the geometry of the system and the permittivity of dielectric materials. The proposed model...
In this work a simple and compact 3-way planar structure which avoids the floating common node for the isolation resistors is presented. The proposed power divider exhibits good return loss and isolation characteristics and additionally provides a wide-band operation, design flexibility and easy implementation.
Basic equivalent circuit models for silicon photomultipliers are used to predict their behavior in application circuits. Time domain output waveforms can be analyzed to gain an estimation of equivalent circuit parameters. Measurement of frequency domain S-parameters provides an alternate and potentially more accurate method to obtain equivalent circuit values. A vector network analyzer and on-wafer...
A large-signal model for 120W high power packaged pre-matched transistor utilizing TriQuint's TQGaN25HV HEMT technology is presented. It is composed of an array of unit-cell nonlinear EEHEMT models representing the high power GaN transistor die and EM based models for the input/output pre-matching circuits relaying the transistor die pads to the package leads. This model offers accurate small-signal...
Triple-layer piezoelectric composite cantilevers possess good electromechanical conversion behavior with characteristics suitable for diverse applications, especially at low frequency. Thus, the use of such cantilevers has been extensively attempted in fabricating piezoelectric devices. This study reports on the accurate determination methods for the equivalent circuit parameters derived from the...
XLPE insulated cable terminations are particularly sensitive to partial discharges (PD), therefore the on-site measurement of PD during cable commissioning tests is of particular interest to the grid operators. In some cases, the use of a coupling capacitor is not possible or not practicable. Lacking the coupling capacitor, the decoupling circuit does not fulfill the prerequisites of IEC standard...
A large-signal model for 120W high power packaged pre-matched transistor utilizing TriQuint's TQGaN25HV HEMT technology is presented. It is composed of an array of unit-cell nonlinear EEHEMT models representing the high power GaN transistor die and EM based models for the input/output pre-matching circuits relaying the transistor die pads to the package leads. This model offers accurate small-signal...
Binaural Room Impulse Responses (BRIR) is important to reproduce high presence room impression with headphones. The key parameters of BRIR are echo density, decay profile and Inter-aural Coherence (IC). Since Monaural Room Impulse Responses (MRIR) have been measured so far, effective use of MRIR resources is required. The new model to obtain the BRIR from MRIR is proposed. Its effectiveness is validated...
The diagnosis of Proton Exchange Membrane Fuel Cells (PEMFC) is based on reliable models and methods able to follow the system operating state. Impedance spectroscopy is usually used to characterize FC systems and deduce impedance models. Indeed, the deformations of the FC impedance spectrum in the Nyquist plane translate eventual malfunctions or degradations of the system as the stack flooding or...
The dynamic deflection and acoustic radiation of thin plates or membranes greatly depends on the acoustic load on top of the vibrating structure. An electro-acousto-mechanical model has been built describing the solid-fluid interaction in time domain. The model is optimized for thin plates and membranes, and can be used for simulating CMUTs (Capacitive Micromachined Ultrasonic Transducers) in different...
We have investigated the influence of carrier traps on device characteristics in TFTs. In particular, our focus was given on transient characteristics influenced by carrier trapping during device operations. A compact model for circuit simulation of TFTs has been developed by considering the time constant of the trapping. The model was verified with measured frequency dependent TFT characteristics.
In today's electricity market, the power supply enterprises have to face power quality problems. The reducing of power system frequency threaten the safety of power grids. At this time, we have to use the Under Frequency Load Shedding(Hereinafter referred to as the UFLS) device to remove partial load, to restore the system frequency within the level of security. UFLS device, therefore, the correct...
For the radiated EMI technology of smart grid equipments, the modeling and features on the interference noise are analyzed in this paper. On the basis of radiated EMI mechanism analysis on the electronic equipments, considering of the special features of smart grid, the chip interference mode and structure interference model are established according to the characteristics of radiated electromagnetic...
In order to adapt to the high measurement precision and wide range in the field of target detecting in military, an improved signal processing circuit is proposed. To keep the secondary information of GMI (giant magneto-impedance) sensor's output signals, a two-order frequency mixing circuit is introduced, so except fundamental frequency features, the secondary frequency features and the wavelet coefficient...
The traditional design of signal phase difference measurement has some shortcomings of complicated hardware structure, bad capacity of resisting disturbance, etc. This problem especially become more prominent during the high frequency signal measurement. In order to eliminate the drawbacks above, this article mix the measured signal in high frequency with the standard DDS signal in low-frequency and...
We implement and verify Si micro-ring modulator (MRM) behavioral model based on the dynamic coupled-mode theory. We also perform circuit-level simulation of the entire Si photonic transmitter including the driver electronics and the Si MRM.
Crosstalk within cable bundles can degrade system performance. In systems that use shielded twisted-wire pairs, the crosstalk occurs primarily in the connector, where individual signal wires are not shielded or twisted. In many cases, the parameters which determine crosstalk within the connector are unknown, in part because the connector is closed and wires cannot be accessed. A methodology was developed...
This paper presents a sub-circuit-based method to model the passive distribution network (PDN) using measured S-parameters. In general modeling method the PDN models have to be transformed into electric networks consists of resistor, inductor and capacitor components. These modeling processes generally take much time and need repeated adjustments. The sub-circuit-based modeling method converts the...
An optical method is proposed to measure the input impedance of a microstructure in vivo operating at microwave frequencies. It makes use of the non-linearity of an AC-DC conversion circuit and encodes the received power level to the pulse rate of an LED which can be accurately measured by a photodiode outside the tissue medium. An accurate measurement of the characteristics of the power-receiving...
Human body communication (HBC) is a communication technology that uses the body of a person as a channel to propagate signals. Many characteristics of HBC present advantages over the most common radiation-based methods, which makes it an interesting alternative to implement the emergent body area networks. The characterization of the HBC channel presented in the literature still cannot provide a good...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.