The authors propose four versions of a dual-gate active down-conversion mixer for H-band applications. operates at local oscillator (LO) frequency 240 GHz. It is designed maximum conversion gain and large bandwidth least 50 GHz from 220 to 270 Furthermore, the .optimised operate low LO power levels beneath 0 dBm. This renders hungry buffer stages redundant. Hereby, necessary chip size overall c...

As for all materials, the performance of concrete is determined by its microstructure. Its microstructure is determined by its composition, its curing conditions, and also by the mixing method and mixer conditions used to process the concrete. This paper gives an overview of the various types of mixing methods and concrete mixers commercially available used by the concrete industry. There are t...

—A compact 180° hybrid has been developed for use in balanced SIS mixers. The lumped-element circuit uses superconducting Nb conductors on a 1.4 mm x 0.5 mm quartz substrate and operates over 4-12 GHz. Index Terms—Superconducting microwave devices, microwave integrated circuits, hybrid junctions, lumpedelement microwave circuits, superconductor-insulatorsuperconductor mixers.

In this study, two different types of 90-degree hybrid mixers were designed and analyzed in an ISM (industrial, scientific, and medical) 2.4 GHz band. The first is a general type; the other, a low-distortion type. For the low-distortion type, the 1-dB compression point and the third interception point are increased about 3-dB. The proposed mixers have a major shortcoming with a significant pena...

A regression model for simulating residence time distribution (RTD) of turbulent flows in helical static mixers is proposed and developed to predict the residence time distribution in static mixers. An efficient method is required to estimate the RTD and the sole means of achieving this is through detailed regression model. The RTD was calculated numerically by regression model. The results of ...

AbstructWe report on the development of low-noise quasioptical SIS mixers for the frequency range 400-850 GHz. The mixers utilize twin-slot antennas, two-junction tuning circuits, and Nb-trilayer junctions. Fourier-transform spectrometry has been used to verify that the frequency response of the devices is well predicted by computer simulations. The 400-850 GHz frequency band can be covered wit...

Residual phase noise from local oscillators (LO) can be degraded by additive noise of on-chip local oscillator drivers/buffers in integrated circuit mixers. Reciprocal mixing of strong RF signals with the LO noise degrades the receiver sensitivity. Specification and evaluation of the LO noise degradation in integrated mixers will enable a system designer to compute the loss of sensitivity in th...

We consider the mixing of similar, cohesionless granular materials in quasi-two-dimensional rotating containers by means of theory and experiment. A mathematical model is presented for the flow in containers of arbitrary shape but which are symmetric with respect to rotation by 180 degrees and half-filled with solids. The flow comprises a thin cascading layer at the flat free surface, and a fix...

Wheat flour dough is a rheologically complex viscoelastic material, whose unique time-dependent properties depend on the quality of the flour, the available moisture, and the extent to which the dough is mixed. The rheological properties developed in dough during mixing are governed by the rate, amount, and type of deformation applied. As a result, dough mixers have evolved into highly complex ...