Open AccessGA‐based optimisation of the interaction structure of an X‐band helix travelling wave tube
Author(s) -
Narasimhan Purushothaman,
Srivastava Vishnu,
Ghosh Sanjay K.
Publication year - 2018
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2017.0923
Subject(s) - traveling wave tube , helix (gastropod) , genetic algorithm , power (physics) , range (aeronautics) , tube (container) , set (abstract data type) , software , process (computing) , engineering , mathematics , computer science , electronic engineering , physics , mechanical engineering , mathematical optimization , thermodynamics , biology , programming language , aerospace engineering , amplifier , ecology , operating system , cmos , snail
Genetic algorithm (GA) has been adopted for the optimisation of the slow wave structure (SWS) of an X‐band helix travelling wave tube. To reduce the optimisation time and to achieve the desired performance, a software code based on GA has been developed to automate the optimisation process of the helix SWS. A two‐section SWS has been optimised. The pitches and the lengths of all the subsections have been considered with the objective of achieving the desired saturated output power and the saturated gain over the operating frequency range. The procedure for the implementation of the GA has been demonstrated. Multiple trials have been conducted for achieving the most optimal set of parameters. The cost over several generations for all the trials is presented and the optimised values of the saturated output power and the saturated gain are also shown.