Advanced microwave wireless devices are needed to dynamically adapt to field conditions. One possible approach for circuit tunability is optical control. In this paper a new optically tunable filter concept is proposed based on LTCC technology and new photoconductive polymer materials. The theoretical foundations of a tunable resonator, simulations of resulting filter performance, specifications of required material properties and basic measurements of this new tunable filter are presented. Finally, a proposed design for an LTCC-based optically controlled filter is given. The feasibility of a filter whose center frequency switches from 8.8 GHz to 6.2 GHz with polymer material having either σ < 10-3 S/m or σ > 10+5 S/ m, is shown.

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Keywords Lowtemperature co-fired ceramics, Microwave circuits, Optically sensitive polymer, System-on-package, Tunable filter
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Conference 2010 23rd Canadian Conference on Electrical and Computer Engineering, CCECE 2010
González, J.M. (José Manuel), Baillargeat, D. (Dominique), & Roy, L. (2010). LTCC-based optically tunable microwave filter. In Canadian Conference on Electrical and Computer Engineering. doi:10.1109/CCECE.2010.5575150