Design and Evaluation of Transmitting Antennas for Solar Power Satellite Systems

This paper proposes a design of a 38 GHz Low Noise Amplifier (LNA) that uses a three-stage common source inductive degeneration topology with a gain of 27 dB and noise figure of 1.78 dB using 0.1 µm GaAs pHEMT as an active device. The novelty of the design is the usage of inductive load in series with the resistor instead of resistive load, resulting in higher gain performance. A recent pp1010 active device of WIN foundry was explored for this LNA design at the Q band. The high transition frequency offered by this technology succeeded in obtaining competitive results with a minimum number of cells. The designed LNA obtained the lowest noise compared to other recently published LNA designs at the Q band. The total power consumption of this design is 57 mW.

Section: Introductionmentioning

confidence: 99%

A Low Noise Amplifier with 27 dB Gain and 1.78 dB Noise for Satellite Communications with 0.1 µm GaAs pHEMT Technology

Balla,

Gollakota

2023

“…Furthermore, electron-impact ionization has been used to measure a detailed ionization spectrum and cross-sections using various methods [4]. Plasma is important in nuclear physics because many studies showed that it can take various shapes, including nonequilibrium plasma that is used to change the characteristics of the surface [5,6]. The characteristics of non-equilibrium plasmas are known through the ionization of atoms and molecules by electron impact, which has great practical significance.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Superstatistics Properties on Hot Plasma

Dilmi¹,

Khalfaoui²,

Boumali

2022

The electron impact ionization is a crucial atomic process in the collisional radiative model and the study of ionization balance. The superstatistics theory, which was originally proposed for the study of non-equilibrium complex systems, has recently been extended to studies of small systems interacting with a finite environment due to their interesting statistical behavior. This paper introduces the superstatistics formalism in the case of ionization rates with different values of the dynamical parameter q and shows how it affects the calculation of the ionization rates for Li+. Moreover, the distribution function for the effective Boltzmann factor of superstatistics was swapped.

“…Consequently, EII is important to model astrophysical systems including nonthermal distributions [4]. Determining the spatial distribution of hot electrons in plasma is very crucial as they affect radiation production, energy balance, and plasma dynamics [5,6]. These electrons may cause considerable energy losses and negatively impact the plasma's stability and control.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Hot Electrons on the Calculation of Ionization Rates

Lifa¹,

Dilmi²,

Bentridi

2022

Electron-Impact Ionization (EII) is considered one of the most important ionization methods in dynamic systems, in which elements and ions are suddenly exposed to energetic electrons. In many plasma types, it has been observed that some electrons (hot) are governed by a non-Maxwellian energy distribution. This study illustrates the effects of a non-Maxwellian distribution on beryllium and Be+2 emission lines and their effective ionization rate coefficients. The focus on beryllium as an impacted material by electron flux aimed to evaluate the EII rates for Be and generate the corresponding datasets needed for Be+2 data analysis. An interaction cross-section was generated using the Flexible Atomic Code (FAC) and used in the estimation of the EII distribution energy functions to estimate the ionization rates for a non-Maxwellian distribution. The use of non-Maxwellian energy distributions for different fractions of hot electrons showed the sensitivity of these rates to the fraction of hot electrons and the forms of the electron energy distribution. The results were in good agreement with those found in the literature.