Low Loss 4 6 Ghz Tunable Filter With 3 Bit High Q Orthogonal Rf Mems Capacitance Network
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Advanced RF MEMS
Author: Stepan Lucyszyn
language: en
Publisher: Cambridge University Press
Release Date: 2010-08-19
An up-to-date guide to the theory and applications of RF MEMS. With detailed information about RF MEMS technology as well as its reliability and applications, this is a comprehensive resource for professionals, researchers, and students alike. • Reviews RF MEMS technologies • Illustrates new techniques that solve long-standing problems associated with reliability and packaging • Provides the information needed to incorporate RF MEMS into commercial products • Describes current and future trends in RF MEMS, providing perspective on industry growth • Ideal for those studying or working in RF and microwave circuits, systems, microfabrication and manufacturing, production management and metrology, and performance evaluation
Low-Loss 4-6 GHz Tunable Filter with 3-Bit High-Q Orthogonal RF-MEMS Capacitance Network
A low loss 4-6 GMz 3-bit tunable filter was designed and fabricated on a quarz substrate. A high-Q 3-bit orthogonal RF-MEMS capacitance network is presented and its significance on the filter Q is discussed. Detailed design equations for the capacitively-loaded coupled open-loop, =2 resonators and realization of capacitive external coupling with source-load impedance loading are discussed. The measured filter shows an unloaded-Q of 85-170, an insertion loss of 1.5-2.8 dB (including connector loss), and the measured 1-dB bandwidth is 4.35 +- 0.35% over the 4-6 GMz tuning range. The measured IIP3 and 1-dB power compression point at 5.91 GMz are> 40 dBm and 27.5 dBm, respectively. The unloaded Q and insertion loss can be improved to 125-210 and 1.8-1.1 dB with the use of a thicker bottom electrode. To our knowledge, this is the highest Q tunable planar filter to-date at this frequency range.
Advances in Multi-Band Microstrip Filters
Author: Vesna Crnojević-Bengin
language: en
Publisher: Cambridge University Press
Release Date: 2015-06-11
The first of its kind, this comprehensive work details the theory and practical design of new multi-band filters.