An Update on New Tunable Technologies
New tunable technologies are being developed that can achieve the required performance with smaller size and lower power consumption, and in most case, fabrication that is compatible with high levels of integration. These include thin film ferroelectric-dielectric composite devices using barium strontium titanate (BST), various MEMS chip-scale technologies, and improvements in semiconductor-switched technologies. There is also work on gallium nitride (GaN) varactors, which have much higher breakdown voltages that silicon devices. At this time, all methods being readied for production involve tunable capacitance, although research is underway into inductors that use ferroelectric materials.
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