Title :
Design and Fabrication of Ultra-Wideband Baluns Embedded in Multilayer Liquid Crystal Polymer Flex
Author :
Chen, Andy C. ; Chen, Morgan J. ; Pham, Anh-Vu
Author_Institution :
Univ. of California, Davis
Abstract :
In this paper, we present the design and fabrication of ultra-wideband (UWB) baluns embedded in multilayer liquid crystal polymer (LCP) flex. Fabrication techniques are demonstrated for processing these commercially available LCP thin-films by standard PCB equipments. Variations in the LCP thin-film thickness are characterized and compared before and after lamination. Results show good dimensional stability of the material, a critical factor in controlling the line impedances and performance of the balun. Electrical results of these baluns show bandwidths exceeding 3.1-10.6 GHz with less than 1 dB insertion loss, and amplitude and phase imbalance less than 1.2 dB and 2deg, respectively. These baluns are ideal for applications in UWB communication systems specified by the IEEE 802.15.3a standard.
Keywords :
baluns; liquid crystal polymers; microstrip lines; system-in-package; ultra wideband technology; LCP thin-film thickness; UWB communication systems; multilayer liquid crystal polymer flex; ultra wideband baluns; Communication system control; Crystalline materials; Fabrication; Impedance matching; Lamination; Liquid crystal polymers; Nonhomogeneous media; Stability; Thin films; Ultra wideband technology; Balun; liquid crystal polymer (LCP); microwave; thin-film; ultra-wideband (UWB);
Journal_Title :
Advanced Packaging, IEEE Transactions on
DOI :
10.1109/TADVP.2007.901577
