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Analysis of balanced active doubler for broad-band operation - the frequency-tuning concept

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5 Author(s)
Piernas, Belinda ; NTT Network Innovation Labs., Kanagawa, Japan ; Nishikawa, K. ; Nagagawa, T. ; Hayashi, H.
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A comprehensive analysis of an active balanced frequency doubler is described and proposed as a new concept: tuning the center frequency at which the doubler exhibits its highest performance to extend the usable bandwidth of the device. The concept is validated using a fabricated V-band pseudomorphic high electron-mobility transistor frequency doubler. For this device, a substantial improvement in the usable bandwidth (more than double) is achieved, demonstrating that the proposed concept is particularly suitable for the realization of high spectral purity and widely tunable V-band frequency sources

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:50 ,  Issue: 4 )