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Theory and Performance of a Power-Combining Multiple-Device Ladder Amplifier

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3 Author(s)

This paper presents a detailed discussion on the microwave power amplification using a multiple-device ladder structure which is essentially an array of diode-mount-pairs in a rectangular waveguide cavity. For both transmission and reflection types, the capability of perfect combining of available powers from each component device and available input signal power is analytically described. A power flow distribution along the structure is also described to interpret the power-combining mechanism. Amplifier characteristics are studied through numerical analysis and well confirmed by experiments on X-band amplifiers with up to eight Gunn diodes.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:34 ,  Issue: 3 )