scholarly journals THEORETICAL STUDY OF MICROWAVE TRANSISTOR AMPLIFIER DESIGN IN THE CONJUGATELY CHARACTERISTIC-IMPEDANCE TRANSMISSION LINE (CCITL) SYSTEM USING A BILINEAR TRANSFORMATION APPROACH

2011 ◽  
Vol 120 ◽  
pp. 309-326 ◽  
Author(s):  
Rardchawadee Silapunt ◽  
Danai Torrungrueng
Keyword(s):  
Transmission Line ◽  
Theoretical Study ◽  
Characteristic Impedance ◽  
Bilinear Transformation ◽  
Microwave Transistor ◽  
Transistor Amplifier ◽  
Transformation Approach ◽  
Amplifier Design

scholarly journals Moving Reference Planes of Unit Cells of Reciprocal Lossy Periodic Transmission-Line Structures

2018 ◽  
Vol 16 (2) ◽  
pp. 15-20
Author(s):  
Suthasinee Lamultree
Keyword(s):  
Transmission Line ◽  
Propagation Constant ◽  
Characteristic Impedance ◽  
Numerical Results ◽  
Reflection Coefficients ◽  
Bilinear Transformation ◽  
Reference Position ◽  
Unit Cells ◽  
Complex Propagation ◽  
Periodic Transmission

An analysis of moving reference planes of unit cells of reciprocal lossy periodic transmission-line (TL) structures (RLSPTLSs) by using the equivalent bi- characteristic-impedance transmission line (BCITL) model is presented. Applying the BCITL theory, only the equivalent BCITL parameters (characteristic impedances for wave propagating in forward and reverse directions and associated complex propagation constant) are of interest. In the analysis, an arbitrary infinite RLSPTLS is firstly considered by shifting a reference position of unit cells along TLs. Then, a semi-infinite terminated RLSPTLS is subsequently investigated in term of associated load reflection coefficients. It is found that the equivalent BCITL characteristic impedances of the original and shifted unit cells, as well as the associated load reflection coefficients of both unit cells, are mathematically related by the bilinear transformation. However, the equivalent BCITL complex propagation constant remains unchanged. Numerical results are provided to show the validity of the proposed technique.

Power added efficiency optimisation of microwave transistor amplifier

1989 ◽  
Vol 25 (8) ◽  
pp. 542 ◽  
Author(s):  
A. Algani ◽  
H. Wang ◽  
A. Konczykowska
Keyword(s):  
Microwave Transistor ◽  
Power Added Efficiency ◽  
Transistor Amplifier

scholarly journals AMPLIFIER DESIGN FOR MODELING THE TRANSMISSION OF A DIGITAL VIDEO SIGNAL OVER A DATA TRANSMISSION CHANNEL

2021 ◽  
Vol 445 (1) ◽  
pp. 39-45
Author(s):  
M. Amreev ◽  
R. Safin ◽  
T. Pavlova ◽  
E. Temyrkanova ◽  
Y. Garmashova
Keyword(s):  
Transmission Line ◽  
Video Surveillance ◽  
Video Transmission ◽  
Main Task ◽  
Surveillance Systems ◽  
Video Signals ◽  
Ohmic Resistance ◽  
In Series ◽  
Amplifier Design

The use of video surveillance systems is used in the areas of security, law and order, in the territories of protected objects, in monitoring the movement of road vehicles and in other areas. The main disadvantage of a video surveillance system is its susceptibility to weather influences (rain, fog, snowfall, etc.), which degrades the quality of the video system by reducing the signal level. Therefore, the urgency of finding new ways and possibilities to improve the quality of video signals is one of the priority areas of signal processing. The main task of this work was to determine the main parameters, simulate the transmission line and amplifier, and select the schematic diagram of the transmitting and receiving path with the voltage and current ratings. Both the receiver and the cable video transmitter have different means of adjusting to different transmission line lengths. The signal at the output of each receiver should be in the range from 0.9 to 1.1 V, and the spread of the total ohmic resistance of the wires of the video transmission line at the input of the receiver should be no more than 2 – 3%. Based on these parameters, the equipment is configured for transmitting video over the channel. The magnitude of the mismatch is regulated by potentiometers, which allow smooth adjustment of the video transmission equipment [1]. As a rule, video transmission over the channel is carried out at a distance of 50 to 1500 m. If it is necessary to transmit video at distances less than 50 m, additional resistances are connected in series at the receiver input so that the total line resistance is 30 - 50 Ohm [1].

Characteristic impedance of a curved microstrip transmission line

1988 ◽  
Vol 1 (7) ◽  
pp. 257-259 ◽  
Author(s):  
J. S. Roy ◽  
D. R. Poddar ◽  
A. Mukherjee ◽  
S. K. Chowdhury
Keyword(s):  
Transmission Line ◽  
Characteristic Impedance ◽  
Microstrip Transmission Line
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