Characterization of a Ka-band Sheet-Beam Coupled-Cavity Slow-Wave Structure

This paper investigates the properties of a three-slot doubly periodic staggered-ladder sheet-beam coupled-cavity slow-wave structure (SWS) developed at the U.S. Naval Research Laboratory. The structure is overmoded with complicated mode crossings and field structures. The staggered-ladder structure is compared to round-beam structures via full-wave electromagnetic simulations and experimental measurements. We explore the application of this SWS in a traveling-wave tube amplifier.

[1]  H. R. Johnson.  Backward-Wave Oscillators , 1955, Proceedings of the IRE.

[2]  J. D. Wilson,et al.  Simulation of cold-test parameters and RF output power for a coupled-cavity traveling-wave tube , 1995 .

[3]  H. Curnow,et al.  A General Equivalent Circuit for Coupled-Cavity Slow-Wave Structures , 1965 .

[4]  J. Pierce,et al.  Traveling-Wave Tubes , 1947, Proceedings of the IRE.

[5]  David Chernin,et al.  Stability of traveling-wave amplifiers with reflections , 2002 .

[6]  Liu Shunkang,et al.  Method for calculating the properties of coupled-cavity slow-wave structures from their dimensions , 1986 .

[7]  David K. Abe,et al.  Experimental characterization of a Ka-band sheet-beam coupled-cavity slow-wave structure , 2009, 2009 IEEE International Vacuum Electronics Conference.

[8]  R. Begum,et al.  A 500-W coupled-cavity TWT for Ka-band communication , 2005, IEEE Transactions on Electron Devices.

[9]  A. Horsley,et al.  Measurement of dispersion and interaction impedance characteristics of slow-wave structures by resonance methods , 1966 .

[10]  H. Mendlowitz,et al.  Topics in Electromagnetic Theory , 1959 .

[11]  Lalit Kumar,et al.  Improved equivalent circuit model of practical coupled‐cavity slow‐wave structures for TWTs , 2002 .

[12]  D. J. Connolly,et al.  Determination of the interaction impedance of coupled cavity slow wave structures , 1976, IEEE Transactions on Electron Devices.

[13]  T.M. Antonsen,et al.  Frequency domain simulation of drive induced oscillation in a coupled cavity TWT , 2009, 2009 IEEE International Vacuum Electronics Conference.

[14]  B. Levush,et al.  Vacuum Electronics: Status and Trends , 2007, 2007 IEEE Radar Conference.

[15]  J.R.M. Vaughan,et al.  Calculation of coupled-cavity TWT performance , 1975, IEEE Transactions on Electron Devices.

[16]  A.W. Scott.  Why a circuit sever affects traveling-wave tube efficiency , 1962, IRE Transactions on Electron Devices.