A New Microwave Triode: Its Performance as a Modulator and as an Amplifier

Abstract

This paper describes a microwave circuit designed for use with the 1553‐416A close‐spaced triode at 4000 m.c. It presents data on tubes used as amplifiers and modulators and concludes with the results obtained in a multistage amplifier having 90 db gain.

Cold Cathode Microwave Devices

“…In a triode, the electron beam is modulated by a grid and collected by a plate (anode), which is connected through a load to ground. The classical high-frequency vacuum triode reached maturity in the late 1940s with the "lighthouse" family of cavity-driven, gridded tubes [25][26][27][28]. In the "lighthouse" design, all high-frequency connections were made radially through disk leads, which minimized parasitic losses.…”

Vacuous Soundings [Microwave Bytes]

“…But given a computer circuit simulator, not to mention a vector network analyzer (VNA), both very modern luxuries in the eyes of a 1950s microwave designer, it is tempting, and as a minimum entertaining, to take a look at a typical triode using these modern tools. My focus at this point is the 416B, shown in Figure 2, mainly because this was used in 3 GHz microwave links and has some extensive information available on its design, construction, and performance [6], [7]. In particular, [7] describes in some detail the circuit design that yielded over 10 dB gain at 4 GHz.…”

“…My focus at this point is the 416B, shown in Figure 2, mainly because this was used in 3 GHz microwave links and has some extensive information available on its design, construction, and performance [6], [7]. In particular, [7] describes in some detail the circuit design that yielded over 10 dB gain at 4 GHz.…”