Plasma-based microwave power limitation in a printed transmission line: a self-consistent model compared with experimental data

Plasma-based microwave power limitation in a suspended microstrip transmission line integrating a micro hollow cathode discharge (MHCD) in its centre is experimentally and numerically studied. Transient and steady state microwave power measurements exhibit a limitation threshold of 28 dBm and time r...

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Bibliographic Details
Published in:Plasma sources science & technology 2022-02, Vol.31 (2), p.25009
Main Authors: Fuster, Lucas, Hagelaar, Gerjan, Pascaud, Romain, Simon, Antoine, Hoffmann, Patrick, Liard, Laurent, Pascal, Olivier, Callegari, Thierry
Format: Article
Language:English
Subjects:
Engineering Sciences
ionization wave
microwave plasma discharge
microwave power limiter
Physics
plasma modelling
printed transmission line
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Summary:Plasma-based microwave power limitation in a suspended microstrip transmission line integrating a micro hollow cathode discharge (MHCD) in its centre is experimentally and numerically studied. Transient and steady state microwave power measurements exhibit a limitation threshold of 28 dBm and time responses of 25 microseconds. Intensified charge-coupled device imaging shows that microwave breakdown occurs at the top of the MHCD. The plasma then extends towards the microwave source within the suspended microstrip transmission line. Besides, a self-consistent model is proposed to simulate the non-linear interaction between microwave and plasma. It gives numerical results in agreement with the measurements, and show that the plasma expansion during the transient response is related to a shift between the ionization source term and the electron density maximum. The propagation speed, under the tested conditions, depends mainly on the stepwise ionization from the excited states.
ISSN:0963-0252
1361-6595
DOI:10.1088/1361-6595/ac4848