Abstract-We propose a new topology based on a semilumped complex impedance transformer for the design of a frequency tunable three-port power divider. A prototype has been realized in a hybrid technology with commercially available varactor diodes. Our design is based on an impedance transformer in the input branch (with electrical length of 20.4°), and a loop in the output branches (with electrical length of 2x24°). This leads to a miniaturized device, more than two times shorter than a classical Wilkinson power divider. This divider can be tuned over ±30% around 1.35 GHz (from 0.95 GHz to 1.75 GHz) with insertion loss lower than 0.3 dB, return loss better than 20 dB and isolation between the two output ports better than 20 dB. Moreover, the low-pass behavior of the input impedance transformer leads to a good rejection of the second harmonic.
Alternative interconnect systems were recently proposed in order to overcome the problems of time delay, surface and power consumption related to global traditional ones. The feasibility of wireless intra chip interconnects is studied, by focusing on system transmission properties and parasitic effects between integrated antenna and nearby interconnects. Technological processes were considered in order to deduce innovative design concepts that combine improved transmitted power and reduced interferences between antenna and nearby components on a SO1 substrate using CMOS 120 nm technology, As a result, it is shown that moving locally away surrounding metallization greatly improves transmission and that crosstalk effects are of the same order with those of conventional interconnect systems. Wireless interconnects performances and compatibility with standard BEOL are demonstrated.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.