TY - JOUR
T1 - Investigation into the temperature dependence of ferrimagnetic nonlinear transmission lines
AU - Bragg, J. W.Braxton
AU - Dickens, James
AU - Neuber, Andreas
N1 - Funding Information:
Manuscript received September 29, 2011; revised November 21, 2011; accepted December 24, 2011. Date of publication February 7, 2012; date of current version October 5, 2012. Work sponsored by the U.S. Office of Naval Research.
PY - 2012
Y1 - 2012
N2 - In pulsed power systems, coaxial based nonlinear transmission lines (NLTLs) loaded with ferrimagnetic materials act as pulse sharpeners or high power microwave sources. Microwave generation comes by way of nonlinearities present in the ferrimagnetic material as well as excitation of damped gyromagnetic precession at large incident power levels. Ferrimagnetic properties highly depend on operating temperature; therefore, there exists a need to understand operational performance of ferrite loaded NLTLs under different temperature environments. Ferrite samples are chilled or heated to temperatures between ?20 °C to 150 °C, providing a wide range of possible operating temperatures. The Curie temperature of the tested samples is approximately 120 °C; therefore, this study allows observation of precession performance in possible operating temperatures as well as a brief look at the consequences of exceeding the Curie temperature. The design, testing, and results for an NLTL measuring 0.3 m in length with ferrite inner and outer diameters of 3 mm and 6 mm, respectively, are detailed. Results reveal precessional performance, both peak power and frequency of oscillations, versus temperature.
AB - In pulsed power systems, coaxial based nonlinear transmission lines (NLTLs) loaded with ferrimagnetic materials act as pulse sharpeners or high power microwave sources. Microwave generation comes by way of nonlinearities present in the ferrimagnetic material as well as excitation of damped gyromagnetic precession at large incident power levels. Ferrimagnetic properties highly depend on operating temperature; therefore, there exists a need to understand operational performance of ferrite loaded NLTLs under different temperature environments. Ferrite samples are chilled or heated to temperatures between ?20 °C to 150 °C, providing a wide range of possible operating temperatures. The Curie temperature of the tested samples is approximately 120 °C; therefore, this study allows observation of precession performance in possible operating temperatures as well as a brief look at the consequences of exceeding the Curie temperature. The design, testing, and results for an NLTL measuring 0.3 m in length with ferrite inner and outer diameters of 3 mm and 6 mm, respectively, are detailed. Results reveal precessional performance, both peak power and frequency of oscillations, versus temperature.
KW - Ferrimagnetic
KW - Nonlinear transmission line (NLTL)
KW - gyromagnetic precession
UR - http://www.scopus.com/inward/record.url?scp=84867572101&partnerID=8YFLogxK
U2 - 10.1109/TPS.2012.2183392
DO - 10.1109/TPS.2012.2183392
M3 - Article
AN - SCOPUS:84867572101
VL - 40
SP - 2457
EP - 2461
JO - IEEE Transactions on Plasma Science
JF - IEEE Transactions on Plasma Science
SN - 0093-3813
IS - 10 PART 1
M1 - 6148287
ER -