Effect of Connectivity on Microwave Dielectric Properties of Low Loss Ceramics Filled PTFE Composites

Abstract

Effects of connectivity patterns on the dielectric properties of polytetrafluoroethylene (PTFE) composites filled with low-lossZn-based ceramics (ZnWO 4 , ZnMoO 4 ) were investigated at microwave frequencies. The dielectric constant (K), dielectric loss (tan δ) and temperature coefficient of resonant frequency (TCF) of the 0-3 connectivity composites were dependent on the type and amount of ceramics. For the composites with 0.2 volume fraction (V f ) of ZnMoO 4 , the K and tan δ increased with number of connectivity and internal strain, respectively. Typical results of K = 2.99, tan δ = 3.155×10 −3 and TCF = 0 ppm/ • C were obtained for the 0-2 connectivity composites with 0.2 V f of ZnMoO 4 .

Connectivity and Empowerment: A Case Study of Cell Phone Technology in Rural Congo

“…This paper used the word connectivity. Indeed, connectivity is a word that has gained explosive popularity in a variety of disciplines, for example: physics (Jeon and Kim, 2012), engineering (Kobayashi, Kobayashi, and Watanabe, 2016), biology (Nigam et al, 2016), computer science (Ferrero and Hanusch, 2014), urban studies (Knight and Marshall, 2015), and economics (Calatayud, Palacin, Mangan, Jackson, and Ruiz-Rua, 2016). However, in this study, the term "connectivity" is most widely used in the context of communication technology-in the linkages between electronics, computers, computer systems and the people who use them-and while it has a very specific association with communication technology it also serves as a proxy for one essential element within all communication-the complex phenomenon of being connected.…”