In this paper an ultrawideband low noise amplifier is proposed. The structure is based on 0.18 μm CMOS technology. The design is based on the current reusing structure to provide the wide band characteristics. A wideband flat gain (S21) about 20dB is achieved, stability of the structure over the whole desired frequency range is provided. Due to careful selection of the elements and biasing cond...

An earth-isolated optically-coupled wideband high voltage probe has been developed for pulsed power applications. The probe uses a capacitive voltage divider coupled to a fast light-emitting diode that converts high voltage into an amplitude-modulated optical signal, which is then conveyed to a receiver via an optical fiber. A solar cell array, powered by ambient laboratory lighting, charges a ...

This paper presents a design of Ultra Wideband Low Noise Amplifier (LNA) with Negative Feedback and multisection matching network implementing on Microstrip design technique. The design started with selecting a transistor which is Super-low noise InGaAs HEMT MGF4937AM transistor that support ultra-wideband frequencies. In order to achieve ultra-wideband LNA, two different techniques which imple...

This paper presents a software-defined radio testbed for the physical layer of wireless LAN standards. All baseband physical layer functions have been successfully mapped on a Pentium 4 processor that performs these functions in real-time. This has been tested in combination with a CMOS integrated wideband analog front-end containing a low noise amplifier, downconversion mixers and filters. The...

Theoretical investigation of the use of feedback around the limiter for improving the capture conditions at the input to the limiter has led to the formulation of a simple theory that unfolds some remarkable properties hitherto unreported. Contrary to the claim of R. M. Wilmotte (1), who made the first (and apparently only) around-the-limiter feedback proposal that exists in published work, thi...

The physical mechanism and output properties of the plasma relativistic microwave noise amplifier (PRNA) are studied numerically by using all electromagnetic particle-in-cell (PIC) code. Firstly, dispersion relation between operating mode slow space charge wave electron beam without coupling is simulated analyzed. Simulation results show that both density <i>n</i><sub>p</su...