ABSTRACT The paper describes common issues faced designing GaAs HBT Power Amplifiers for 2G CDMA handsets & how to solve them. Common issues developed are non-linear noise performance, current consumption & ACPR at all power levels, Icq versus temperature, all related to the bias circuit. Then requirements more specific to 2.5G applications are explored, solutions for better Icq control, Effici...

[1] Analytical and numerical models of the radio frequency emissions produced by relativistic runaway electron avalanches initiated by cosmic ray extensive air showers are presented. It is found that single-point measurements of the distant electromagnetic fields allow the remote determination of the electrostatic field in the runaway electron avalanche region. For instance, it is possible to u...

Electrons have been shown to move in DNA, and a specific DNA sequence is associated with the response to EM fields. In addition, there is evidence from biochemical reactions that EM fields can accelerate electron transfer. Interaction with electrons could displace electrons in H-bonds that hold DNA together leading to chain separation and initiating transcription. The effect of charging due to ...

In this paper, the Hartree-Fock method has been formulated to investigate some of the ground state properties of quasi-one-dimensional interacting electron gas in the presence of the magnetic field. The bare coulomb interaction between electrons has been assumed. For this system, we have also computed some of its thermodynamic and magnetic properties such as the energy, pressure, incompressibil...

The exit phase of an electron moving through electromagnetic potentials can, as is well known, be written as line integrals of the potentials. The use of vector tomography to reconstruct electromagnetic potentials from such phase measurements in a transmission electron microscope is proposed. Electromagnetic fields and source distributions can similarly be reconstructed from phase gradients and...