We analyze two designs for W-Band free electron lasers for application as laboratory instruments in the study of millimeter wave accelerators at high gradient. The first design is based on the linear induction accelerator LELIA (CEA/CESTA, France), employs a 1kA, 80-ns electron pulse, and corresponds to a helical TE11 200MW W-Band amplifier design. We analyze also a W-Band planar ubitron design...

the graphical technique for nonlinear circuits was described that enable us to optimize circuits to obtain maximum output power, maximum efficiency or minimum intermodulation. according to this method a high power amplifier in the ka band was designed. using a nonlinear model of the transistor, optimum slope for load-line was determined so that maximum power at the output was obtainable, then ...

This paper presents a W-band 2 2 focal-plane array (FPA) for passive millimeter-wave imaging in a standard 0.18 m SiGe BiCMOS process ( GHz). The FPA incorporates four Dicke-type receivers representing four imaging pixels. Each receiver employs the direct-conversion architecture consisting of an on-chip slot folded dipole antenna, an SPDT switch, a low noise amplifier, a single-balanced mixer, ...

High power, broad bandwidth, high linearity, and low noise are among the most important features in amplifier design. The broad-band spatial power-combining technique addresses all these issues by combining the output power of a large quantity of microwave monolithic integrated circuit (MMIC) amplifiers in a broad-band coaxial waveguide environment, while maintaining good linearity and improvin...

The new current design is especially suitable for use in multi-standard wireless receiver fo r microwaves communicat ion systems. In recent years, there has been a growing market for dual band transceivers for various wireless standards. This work investigates a novel circuit topology of concurrent Dual-band Low Noise Amplifier (LNA) operates in the 3.9 GHz and 4.48 GHz frequency bands for WLAN...

In this article, we present a complex baseband model for a wideband power amplifier that incorporates carrier frequency dependent amplitude modulation (AM) and phase modulation (PM) (i.e., AM/AM and AM/PM) characteristics in the design process. The structure used to implement the amplifier model is a Wiener system which accounts for memory effects caused by the frequency selective nature of the...