—A 48 GHz fully integrated two stages power amplifier (PA) for mm-wave application is presented in this paper. The PA is implemented in 90 nm LP CMOS technology with Cascode topology to enhance gain and stability. The single ended PA achieves around 15 dB small signal gain, 4.5 dBm saturated output power and a peak power added efficiency of 9% in measurement. Patterned ground shield coplanar tr...

The Internet is rapidly changing from a set of wires and switches that carry packets into a sophisticated infrastructure that delivers a set of complex value-added services to end users. Services can range from bit transport all the way up to distributed value-added services like video teleconferencing, data mining, and distributed interactive simulations. Before such services can be supported ...

One of the most important requirements that RF and microwave power amplifiers designed for radiocommunication systems must meet is an optimum power added efficiency (PAE) or an optimal combination of PAE and linearity. A harmonic active load–pull system which allows the control of the first three harmonic frequencies of the signal coming out of the transistor under test is a very useful tool to...

A Class F power amplifier (PA) at 2.5GHz has been designed and fabricated. Test results show 15.7 dB gain with 75.75% power added efficiency (PAE ), at an input level of 25 dBm. The design procedure is presented, with various issues illustrated and addressed. A new method is proposed to obtain the optimum load and source impedances without iterations, which would usually be necessary.

This paper presents a new procedure to design of high efficiency class E power amplifiers (PAs) using nonlinear transistors. The active device (MESFET-ATF34143) has been investigated and load harmonic networks have also been designed to match the requirement. By using the new procedure, the power added efficiency (PAE) of PAs could be increased to over 70%. The effect of the stabilized resistor...

A 36-element monolithic grid amplifier has been fabricated. The active elements are pairs of heterojunction-bipolar-transistors. Measurements show a peak gain of 5dB at 40GHz with a 3-dB bandwidth of 1.8 GHz(4.5%). Here we also report comparisons of p a t t e r n s and tuning curves between the measurements and theory. The grid includes base stabilizing capacitors which result in a highly stabl...

Two completely random digestion trials were conducted, each with 12 beef steers (325 kg initial weight), to measure changes in digestibilities of fat and of forage components when fat was added to diets containing 62 to 76% wheat straw. Trial 1 diets contained either no added fat or 6.3% added fat from whole cottonseed (30% of the diet), cottonseed oil or animal fat; diets were formulated to co...

The 0 2 yield under flash light illumination in preparations o f Anacystis nidulans was examined in the presence o f redox components such as ferricyanide and ferrocyanide. When ferricyanide (1 mM) was added to the lyophilized, lysozyme treated and EDTA washed cells o f A. nidulans the familiar Joliot-Kok oscillalion with maximum on the third flash and periodicity o f four was observed (in the ...