Junghyun Kim

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A highly-integrated "extended" Doherty-type amplifier has been developed for code-division multiple access (CDMA) applications. In order to overcome the size limit of the Doherty amplifiers for reduced form-factor applications such as handsets, bulky input quadrature coupler and output /spl lambda//4-line transformers have been replaced with an active phase(More)
A compact ultra-broadband distributed SPDT switch has been developed using GaAs PHEMTs. An FET-integrated transmission line structure, where the source pad of the shunt FET has been integrated into the signal line while the drain has been grounded to a via-hole with minimum parasitic inductance, has been proposed to extend the operating bandwidth of the(More)
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