Kai-wen Cheng

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This paper presents a Ka- to F-band ultra-broadband subharmonic mixer (SHM) using the standard 90-nm CMOS process. The proposed SHM employs a distributed amplifier and antiparallel diode pair configuration to realize wide operation bandwidth from 33 to 103 GHz, low conversion loss from 0.52 to 3.35 dB, good local oscillation (LO)-to-RF isolation greater(More)
Michael Shan-Hui Ho, Paul Pin-Shuo Huang, Kun-Yu Hung, Kevin Kai-Wen Cheng, and Elizabeth Hsin-Yu Li Abstract—It is a well-known fact that the DNA mutation plays a very important role in DNA sequence evolution. The backtracking problem of DNA sequence evolution in one dimensional cellular automata (CA) has ben recognized as a NP problem. In this research, a(More)
This paper presents the implementation of a broadband quasi-circulator through a cascading distributed balun using a 90-nm CMOS process. The isolation, |S31|, of the proposed three-port quasi-circulator can be acquired through the phase cancelation technique, by connecting an additional distributed amplifier in parallel between ports 1 and 3. The thorough(More)
Multicast services have received great interests recently. They normally cannot tolerate high packet delay and high loss rate. However, multicast services may be disrupted in mobile and wireless networks. Disruption may be caused by different reasons. In this paper, we consider the disruption resulted from handoffs between base stations. Although many(More)
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