Title :
Ku-Band 3D LTCC Filter and BST-Varactor based Temperature Compensated Resonator
Author :
Gautier, William ; Ziegler, Volker ; Stehle, Armin ; Schoenlinner, Bernhard ; Prechtel, Ulrich ; Menzel, Wolfgang
Author_Institution :
EADS Deutschland GmbH, Munich
Abstract :
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.
Keywords :
Q-factor; cavity resonator filters; ceramic capacitors; ceramic packaging; compensation; crystal filters; ferroelectric capacitors; microwave filters; varactors; 3D LTCC filter; BST-varactor; Q-factor; cavity resonators; ferroelectric varactor; temperature compensated resonator; two-pole cavity resonator filter; Cavity resonators; Ceramics; Ferroelectric materials; Frequency; Joining processes; Q factor; Resonator filters; Temperature; Unmanned aerial vehicles; Varactors; cavity resonator filters; ceramics; ferroelectric capacitors; thermal factors;
Conference_Titel :
Microwave Conference, 2009 German
Conference_Location :
Munich
Print_ISBN :
978-3-9812668-0-1
Electronic_ISBN :
978-3-8007-3150-3
DOI :
10.1109/GEMIC.2009.4815905
