RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends.
Degree: PhD, Electrical and Computer Engineering, 2006, Georgia Tech
This dissertation deals with the development of RF MEMS switches with novel materials and micromachining techniques for the RF and microwave applications. To enable the integration of RF and microwave components on CMOS grade silicon, finite ground coplanar waveguide transmission line on CMOS grade silicon wafer were first studied using micromachining techniques. In addition, several RF MEMS capacitive switches were developed with novel materials. A novel approach for fabricating low cost capacitive RF MEMS switches using directly photo-definable high dielectric constant metal oxides was developed, these switches exhibited significantly higher isolation and load capacitances as compared to comparable switches fabricated using a simple silicon nitride dielectric. The second RF MEMS switch developed is on a low cost, flexible liquid crystal polymer (LCP) substrate. Its very low water absorption (0.04%), low dielectric loss and multi-layer circuit capability make it very appealing for RF Systems-On-a-Package (SOP). Also, a tunable RF MEMS switch on a sapphire substrate with BST as dielectric material was developed, the BST has a very high dielectric constant (>300) making it very appealing for RF MEMS capacitive switches. The tunable dielectric constant of BST provides a possibility of making linearly tunable MEMS capacitor-switches. For the first time a capacitive tunable RF MEMS switch with a BST dielectric and its characterization and properties up to 40 GHz was presented. Dielectric charging is the main reliability issue for MEMS switch, temperature study of dielectric polarization effect of RF MEMS was investigated in this dissertation. Finally, integration of two reconfigurable RF circuits with RF MEMS switches were discussed, the first one is a reconfigurable dual frequency (14GHz and 35 GHz) antenna with double polarization using RF MEMS switches on a multi-layer LCP substrate; and the second one is a center frequency and bandwidth tunable filter with BST capacitors and RF MEMS switches on sapphire substrate.
Advisors/Committee Members: John Papapolymerou (Committee Chair), Cliff Henderson (Committee Member), John Cressler (Committee Member), Joy Laskar (Committee Member), Shyh-Chiang Shen (Committee Member).
Subjects/Keywords: CMOS grade Silicon; Micromachining techniques; LCP; BST; Photodefinable; Novel dielectric materials; RF MEMS switch; SOC/SOP; Micromachining; Microwave devices; Dielectrics
to Zotero / EndNote / Reference
APA (6th Edition):
Wang, G. (2006). RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends. (Doctoral Dissertation). Georgia Tech. Retrieved from http://hdl.handle.net/1853/14112
Chicago Manual of Style (16th Edition):
Wang, Guoan. “RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends.” 2006. Doctoral Dissertation, Georgia Tech. Accessed February 22, 2020.
MLA Handbook (7th Edition):
Wang, Guoan. “RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends.” 2006. Web. 22 Feb 2020.
Wang G. RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends. [Internet] [Doctoral dissertation]. Georgia Tech; 2006. [cited 2020 Feb 22].
Available from: http://hdl.handle.net/1853/14112.
Council of Science Editors:
Wang G. RF MEMS Switches with Novel Materials and Micromachining Techniques for SOC/SOP RF Front Ends. [Doctoral Dissertation]. Georgia Tech; 2006. Available from: http://hdl.handle.net/1853/14112