Effect of the Gas Temperature of a High-Power Chemical Oxygen-Iodine Laser on Calculated Small Signal Gain and Output Power

1995 ◽  
Vol 34 (Part 1, No. 4A) ◽  
pp. 1867-1873
Author(s):  
Tsutomu Fukuda ◽  
Sanichiro Yoshida ◽  
Hiroshi Ohue ◽  
Takeshi Tomizawa ◽  
Tomoo Fujioka ◽  
...  
Keyword(s):  
Output Power ◽  
High Power ◽  
Small Signal Gain ◽  
Small Signal ◽  
Gas Temperature ◽  
Iodine Laser ◽  
Signal Gain ◽  
Chemical Oxygen Iodine Laser

Results of small-signal gain measurements on a supersonic chemical oxygen iodine laser with an advanced nozzle bank

2002 ◽  
Vol 38 (5) ◽  
pp. 421-428 ◽  
Author(s):  
V.D. Nikolaev ◽  
M.V. Zagidullin ◽  
M.I. Svistun ◽  
B.T. Anderson ◽  
R.F. Tate ◽  
...  
Keyword(s):  
Small Signal Gain ◽  
Small Signal ◽  
Iodine Laser ◽  
Signal Gain ◽  
Chemical Oxygen Iodine Laser

Optimization of InP DHBT stacked-transistors for millimeter-wave power amplifiers

2018 ◽  
Vol 10 (9) ◽  
pp. 999-1010 ◽  
Author(s):  
Michele Squartecchia ◽  
Tom K. Johansen ◽  
Jean-Yves Dupuy ◽  
Virginio Midili ◽  
Virginie Nodjiadjim ◽  
...  
Keyword(s):  
Integrated Circuits ◽  
Output Power ◽  
Heterojunction Bipolar Transistors ◽  
Power Amplifiers ◽  
Small Signal Gain ◽  
Small Signal ◽  
Large Signal ◽  
Signal Gain ◽  
Power Added Efficiency ◽  
Saturated Output Power

AbstractIn this paper, we report the analysis, design, and implementation of stacked transistors for power amplifiers realized on InP Double Heterojunction Bipolar Transistors (DHBTs) technology. A theoretical analysis based on the interstage matching between all the single transistors has been developed starting from the small-signal equivalent circuit. The analysis has been extended by including large-signal effects and layout-related limitations. An evaluation of the maximum number of transistors for positive incremental power and gain is also carried out. To validate the analysis, E-band three- and four-stacked InP DHBT matched power cells have been realized for the first time as monolithic microwave integrated circuits (MMICs). For the three-stacked transistor, a small-signal gain of 8.3 dB, a saturated output power of 15 dBm, and a peak power added efficiency (PAE) of 5.2% have been obtained at 81 GHz. At the same frequency, the four-stacked transistor achieves a small-signal gain of 11.5 dB, a saturated output power of 14.9 dBm and a peak PAE of 3.8%. A four-way combined three-stacked MMIC power amplifier has been implemented as well. It exhibits a linear gain of 8.1 dB, a saturated output power higher than 18 dBm, and a PAE higher than 3% at 84 GHz.

scholarly journals Characteristics of a CW HF chemical laser calculated from a simplified two-dimensional model

1986 ◽  
Vol 4 (2) ◽  
pp. 167-181 ◽  
Author(s):  
Zhou Xuehua ◽  
Chen Liyin ◽  
Chen Haitao
Keyword(s):  
Stokes Equations ◽  
Computing Time ◽  
Navier Stokes ◽  
Small Signal Gain ◽  
Small Signal ◽  
Two Dimensional ◽  
Gas Temperature ◽  
Navier Stokes Equations ◽  
Chemical Laser ◽  
Signal Gain

A two-dimensional simplified model of an HF chemical laser is introduced. Using an implicit finite difference scheme, the solution of two adjacent parallel streams with diffusion mixing and chemical reaction is generated. A contour of the mixing and reaction boundary is obtained without presupposition. The distribution of the HF(u) concentrations, gas temperature and the optical small signal gain (αu, J) on the flowing plane (X, Y) are presented. Compared with the solution solved directly from a set of Navier–Stokes equations, the results of these two methods agree with each other qualitatively. The influences of the different velocity, temperature (T0) and composition of the two streams on the small signal gain after the nozzle exit are investigated. It is interesting that for larger J with a fixed u, the peaks of αu, J—T0 profiles move towards higher T0. The computing method is simple and only a short computing time is needed.

Oxygen iodine laser kinetics and small signal gain (Abstract Only)

1990 ◽  
Author(s):  
Willy L. Bohn ◽  
Keith A. Truesdell ◽  
W. Pete Latham ◽  
Petras V. Avizonis
Keyword(s):  
Small Signal Gain ◽  
Small Signal ◽  
Iodine Laser ◽  
Signal Gain
Sign in / Sign up

Export Citation Format

Share Document