RF Electronics & Analysing the Magnetron Drive Circuit

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For a more readable treatment see the attached document.

Determination of circuit parameters for a Magnetron Drive Circuit - RF Electronics

PROBLEM:

A Magnetron Drive Circuit is described by the circuit shown in Figure 1. In addition the said Magnetron has the following circuit parameters defined.

Magnetron Definition parameters:

Input impedance of Magnetron (ZMAG ) = 625 Ohms
DC to RF conversion efficiency of Magnetron (Eff (DC-RF) ) = 75 % = 0.75

Magnetron Drive circuitry definition:

{SEE ATTACHMENT FOR CIRCUIT DIAGRAM}

VS = 1 kV, LCH = 3.12 H, L = 160 nH, C = 260 pF, no. sections in LC delay
line n = 20

Figure 1: A Magnetron Drive Circuit

(Q1) Determine an estimate for the required number of turns (N) on the secondary of
the transformer.

(A1) Theory states that the output impedance as seen by the transformer (in this case
the input impedance of the Magnetron) is given as the input impedance (in this
case the delay line impedance) multiplied by the transformer turns ratio squared. ...