In the current state of art, WiFi-alike standards require achieving a high Image Rejection Ratio (IRR) while having low power consumption. Thus, quadrature structures based on passive ring mixers offer an attractive and widely used solution, as they can achieve IRR being block. However, it is not easy for designer to know when simple scheme enough should aim double structure approach, latter im...

The impedance of the superconducting hot-electron bolometer mixer was measured in the range 0.2-4 GHz. A special technique relying on determination of the Sz, transmission parameter of the device was used. Many advantages of the technique (wide frequency range, in situ calibration, low test power, accuracy) are demonstrated. The estimate of the mixer bandwidth from the impedance data using the ...

Critical Temperature Dependence of High Frequency Electron Dynamics in Superconducting Hot-Electron Bolometer Mixers Irfan Siddiqi May, 2002 Superconducting diffusion-cooled hot-electron bolometer (HEB) mixers are ideal candidates for use in terahertz heterodyne spectroscopy (THz). This thesis investigates mixer performance as a function of the superconducting transition temperature (Tc). In th...

This paper presents a Q-band image-rejection receiver using 65 nm CMOS technology. For high ratio (IMRR), the employs Hartley architecture which consists of low-noise amplifier, two down-conversion mixers, 90° hybrid coupler, and IF baluns. In addition, fundamental voltage-controlled oscillator (VCO) frequency divider chain divided by 256 are integrated into for LO. A charge injection technique...

Turbulent fluid mixing is an important aspect of many industrial and technological processes where efficient various components paramount importance to achieve the desired results. Optimal can improve product quality, ensure unity complex reactions, reduce process lead times. In this regard, study understanding influence geometry mixer on characteristics turbulent flow becomes urgent task scien...

Modern wireless transceivers are required to operate over a wide range of frequencies in order to support the multitude of currently available wireless standards. Wideband operation also enables future systems that aim for better utilization of the available spectrum through dynamic allocation. As such, co-existence problems like harmonic mixing and phase noise become a main concern. In particu...