نتایج جستجو برای: microwave switch
تعداد نتایج: 110662 فیلتر نتایج به سال:
CMOS switches are one of the main components of today's analog circuits. Among the many types of non-idealities that can affect the performance of the switch, its leakage current is of utmost importance. In order to reduce the leakage current or equally increase the OFF resistance of any switch, a novel technique is presented in this paper. The proposed technique employs the body effect to incr...
In this paper, design, analysis and fabrication of a low loss capacitive RF MEMS shunt switch, which made on the coplanar waveguide transmission line and alumina substrate in the frequency band of 40-60 GHz, is presented. The CPW is designed to have 50Ω impedance matching on the alumina substrate. Then the desired switch is designed with appropriate dimensions. Afterward the important par...
In recent years, nickel has found new applications in RF microfabricated filters and MEMS switches, as it is proving to be a convenient structural material and suitable for realizing power-efficient electrothermal buckle-beam microactuators. While nickel is becoming a material of choice for processing engineers, there is a serious issue of RF characterization at microwave frequencies. This pape...
Future microwave networks require miniature high-performance tunable elements such as switches, inductors, and capacitors. In this paper, high performance variable capacitor was fabricated by simple microelectromechanical systems (MEMS) technology. The capacitance and quality (Q) factor at 1 GHz are 0.792 pF and 51.6. The pull-in voltage is 13.5 V and the tuning ratio of the capacitor is more t...
This paper presents a new large-signal nonlinear model for the GaAs MESFET triode and saturation zones. The model is specially tailored for simulating nonlinear distortion of RF circuits, in which the active device is biased in those regions. This new model will be compared to similar results obtained from a previously presented model and to real measurements of a microwave MESFET from Microwav...
In order to improve mixed optical-electrical microwave devices design, a novel modeling of opto-electronic phenomena as photoconduction effect has been achieved. Multiples photo-induced carriers generations/recombinations processes playing a part in semiconductor subtrates under laser illumination are taken into account and modeled by an equivalent electrical circuit. Various types of modulatio...
The flange climb derailment is one of the cause of derailment for a typical switch. The derailment for the switch is a complex phenomenon since the contact area is changing dynamically. The contact angle between the wheel flange and the switch point is investegated in terms of the risk on the derailment. The contribution of this study is proving that UIC716R standard recommendation about the sw...
Modern medical microwave diagnostic equipment requires the use of solutions related to compactness developed devices and high performance. It is possible achieve set conditions with a modern semiconductor component base based on A3B5 compounds. The paper presents designs main control elements signal as part radiothermometer monolithic Al-GaN/GaN/SiC HEMT SPDT transistor switch MIC LNA basis pHE...
The SMOS Payload is a single instrument, the Microwave Imaging Radiometer using Aperture Synthesis (MIRAS), which was built by EADS-CASA Espacio. MIRAS consists in a passive microwave (L-Band) 2D-interferometer with a Y-shaped 3 arms synthetic aperture antenna. Since PLM switch-on in November 2009, several anomalies have taken place which in some cases put constraints on the availability of the...
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