IEEE TRANSACTIONS ON MICROWAVE THEORY （IEEE微波理论）.pdf

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, VOL. 52, NO. 4, APRIL 2004 1343 Characterization of Liquid Crystal Polymer (LCP) Material and Transmission Lines on LCP Substrates From 30 to 110 GHz Dane C. Thompson, Student Member, IEEE, Olivier Tantot, Hubert Jallageas, George E. Ponchak, Senior Member, IEEE, Manos M. Tentzeris, Senior Member, IEEE, and John Papapolymerou, Senior Member, IEEE Abstract—Liquid crystal polymer (LCP) is a material that performance for minimal increases in price. New material tech- has gained attention as a potential high-performance microwave nologies must be identified that can simultaneously tackle these substrate and packaging material. This investigation uses several challenges of performance, frequency and environmental invari- methods to determine the electrical properties of LCP for mil- ance, and cost. limeter-wave frequencies. Microstrip ring resonators and cavity resonators are measured in order to characterize the dielectric Millimeter-wave systems are designed around two major constant ( ) and loss tangent (tan ) of LCP above 30 GHz. philosophies: system-on-chip (SoC) and system-on-package The measured dielectric constant is shown to be steady near (SoP). SoC is a fully integrated design with RF passives and 3.16, and the loss tangent stays below 0.0049. In addition, various digital and/or optical functions on-wafer [1]. SoP condenses transmission lines are fabricated on different LCP substrate thicknesses and the loss characteristics are given in d