Ku-Band 3D LTCC Filter and BST-Varactor based Temperature Compensated Resonator

Conference: GeMiC 2009 - German Microwave Conference
03/16/2009 - 03/18/2009 at München, Germany

Proceedings: GeMiC 2009

Pages: 4Language: englishTyp: PDF

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Gautier, William; Ziegler, Volker; Stehle, Armin; Schoenlinner, Bernhard; Prechtel, Ulrich (EADS Deutschland GmbH, EADS Innovation Works, IW-SI, 81663 Munich, Germany)
Menzel, Wolfgang (University of Ulm, Dept. Mikrowellentechnik, Albert Einstein Allee 41, 89069 Ulm, Germany)

In this paper, a two-pole cavity resonator filter intended for UAV data-link at Ku-band is demonstrated. The design of the filter realised with LTCC integrated cavity resonators is described and validated by good agreement between specifications and measurements. The unloaded Q-factor of the proposed substrate integrated cavity resonator is assessed and the influence of the different lossy mechanisms present in the resonator is discussed. Finally, the RF-behaviour of a weakly-coupled doubly-terminated cavity resonator is investigated over temperature. A solution implementing a ferroelectric varactor coupled to the cavity resonator is assessed for the compensation of the shift of the resonance frequency observed for the substrate integrated resonator. The unloaded Q-factor of the temperature compensated resonator is measured and compared to the one of the un-compensated cavity.