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.
In this paper, a slot type high impedance surface and a mushroom type high impedance surface are applied respectively for the noise reduction inside the shielded package. A simple and efficient modelling method is proposed for the high impedance surface design. A commercial chip with its package is employed to show the performance of the proposed high impedance surface. Both simulation and measurement...
This paper presents a well performance noise injector that is used in the Q-Band (35–50GHz) dual beam cryogenically cooled receiver of Shanghai 65m Radio Telescope. A good flatness of coupling over a wider frequency spectrum is required in the noise injector. The design is based on the traditional circular waveguide directional coupler. The noise injector exhibits a −31.5dB mean coupling, flatness...
Dual circular polarization (CP) services are growing in popularity in satellite communications applications. Ground terminals with linearly polarized dish antenna feeds routinely achieve high port isolation between polarizations, but dual CP feeds suffer from higher coupling between ports associated with orthogonal polarizations, particularly for planar microstrip antennas used in electronically beamsteered...
The state estimation of complex dynamical networks with time delay coupling under noisy transmission channel is studied in this paper. In order to suppress the effect introduced by the noise and time-varying delay, the state estimation controllers are designed by using integral control approach. A sufficient condition for state estimation is derived by using Lyapunov stability theory and H− Hcontrol...
Cellular network operators are constantly seeking ways to improve network capacity and coverage performances without resorting to use of additional costly frequency spectrum. One of the most effective methods is to reduce the azimuth beamwidth of the antennas by using multiple directional antennas in the azimuth direction, or higher order sectorization [1][2]. This method has recently been proven...
The versatility of nanodevices dynamics may allow original architectures for computation but care should be taken to handle fluctuations arising at this scale. In the network of oscillatory units which we propose, bistability with down-quiescent and up-oscillatory states enable tolerance to noise in storage and retrieval dynamics for patterns or sequences. We illustrate this by simulations of the...
Extensive work over almost the past hundred years has suggested that the stress corrosion cracking of metals and alloys in aqueous environments is primarily an electrochemical phenomenon falling within the realm of the differential aeration hypothesis (DAH). An important feature of the DAH is that the local anode and the local cathode are spatially separated, with the former existing within the crack...
In this paper, an extra loop delay compensation technique for hybrid delta-sigma modulators (DSM) is proposed. The hybrid DSM replaces analog components with digital circuitry by carrying out A/D conversion in the middle stage of a loop filter. The hybrid DSM is a small-sized prototype that realizes A/D conversion with low power consumption. In many cases, A/D converters exhibit latency, which becomes...
The street light system, using a Power Line network, requires detailed knowledge about transmission medium, such as: transfer function, parasitic capacity, induced inductances and noise due to capacitive coupling between phases, in order to undertake a reliable master/slave communication. This paper proposes an innovative algorithm useful for a network dynamic configuration. It will allow to reduce...
Non-iterative co-simulation is a prerequisite for the time correct coupling of distributed solved numerical problems. For this coupling approach typically signal-based extrapolation schemes are used to resolve existing bidirectional dependencies between the interacting subsystems. Nevertheless, the introduced coupling errors influence the entire system behavior. In the case of coupled real-time systems...
In this paper, the extraction for noised saturated sinusoidal signal is proposed for the electro-magnetic coupling sensing system. The method is based on the Least Squares fitting Method to extract the signal amplitude and phase from the saturated sinusoidal signal. According to the extracted amplitude and phase, we can get a sinusoidal signal and remove the sample with lager error by comparing it...
A new fundamental theory of ‘coupled processes’ is here applied to be able to explain and to some extent predict the observed instability and spectrum fluctuations of LC and crystal oscillators. The outcome is a ‘spectrum coupling’ theory which is based on the concept of coupled energy exchange between spectrum components. The origin of the coupling can be said to be ‘energy conservation’ as in the...
This paper investigates the exponential synchronization problem of stochastic complex dynamical networks with impulsive perturbations and Markovian switching. The complex dynamical networks consists of κ modes and the networks switch from one mode to another according to a Markovian chain with known transition probability. Basing on the Lyapunov functional method and stochastic analysis, by employing...
A potential technology by silicon interposer enables high bandwidth and low power application processing devices of the future, because the demand of smart mobile products are driving for higher logic-to-memory bandwidth (BW) over 30 GB/s with lower power consumption and ultra-memory capacity. This paper presents a 2.5D-IC structure with silicon interposer to demonstrate electrical performances including...
With the technology nodes keep advancing, the application of TSV(Through Silicon Via) technology in 3D integration is faced with more challenges. The shift from via-last to via-middle fabrication scheme, the ever-increasing density of TSV, the reduction in supply voltage and the increase in frequency of on-chip local clock, all pose threat to signal/power integrity of the TSV system. In this paper,...
In this paper, a comparative investigation on power noise suppression between two blocks in printed circuit boards (PCBs) is presented. Eight noise isolation methods are discussed, including the reference case and seven most frequently used cases. Optimization and improvement for each method are discussed to achieve better performance. Through comparison, useful guidelines are drawn for real designs.
In this paper, a method called the incident wave excitation method is proposed to incorporate the effects of the coupling noise onto leads of the CAN bus. The equivalent circuit model for two wires (CAN high line and CAN low line) system is firstly derived. The distributed voltage and current sources along the lead excited by the coupling noise can be computed. The set up for the ISO bulk-current...
This paper proposes a remarkably efficient modeling method of stray magnetic couplings in an Electromagnetic Compatibility (EMC) filter focusing on a dominant magnetic field in a power electronic device. The proposed modeling method is applied to a filter performance simulation of an EMC filter for a Silicon Carbide (SiC) solar inverter and its effectiveness is verified by comparing a measurement...
The speed of general purpose input output (GPIO) continues to increase as more consumer applications utilize “smart” devices. The low-voltage differential signaling (LVDS) is often times the highest speed that GPIO interface needs to support in the mixture of different single ended signaling pins. Although LVDS is differential and somewhat immune to direct signal coupling from other signals, it is...
Isolation of supply noise between disparate circuit blocks is crucial. When powered by the same voltage supply, the switching noise created at the supply node of the digital devices can couple into the power path of the RF circuitry and cause significant performance degradation. Electromagnetic bandgap (EBG) structures, ferrite beads, and split planes are all commonly used to mitigate this problem,...
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.