Agrawal, Prannoy ; Kienemund, Daniel ; Walk, Dominik ; Matic, Stipo ; Bohn, Nicole ; Häuser, Kevin ; Fink, Thomas ; Abrecht, Mike ; Bigler, Walter ; Binder, Joachim R. ; Jakoby, Rolf ; Maune, Holger (2021):
Suppression of Acoustic Resonances in BST-Based Bulk-Ceramic Varactors by Addition of Magnesium Borate. (Publisher's Version)
In: Crystals, 11 (7), MDPI, e-ISSN 2073-4352,
DOI: 10.26083/tuprints-00019437,
[Article]
|
Text
crystals-11-00786.pdf Copyright Information: CC BY 4.0 International - Creative Commons, Attribution. Download (1MB) | Preview |
Item Type: | Article |
---|---|
Origin: | Secondary publication via sponsored Golden Open Access |
Status: | Publisher's Version |
Title: | Suppression of Acoustic Resonances in BST-Based Bulk-Ceramic Varactors by Addition of Magnesium Borate |
Language: | English |
Abstract: | This work presents a method for reducing acoustic resonances in ferroelectric barium strontium titanate (BST)-based bulk ceramic varactors, which are capable of operation in high-power matching circuits. Two versions of parallel-plate varactors are manufactured here: one with pure BST and one with 10 vol-% magnesium borate, Mg₃B₂O₆ (MBO). Each varactor includes a 0.85-mm-thick ferroelectric layer. Acoustic resonances that are present in the pure BST varactor are strongly suppressed in the BST-MBO varactor and, hence, the Q-factor is increased over a wide frequency range by the addition of small amounts of a low-dielectric-constant (LDK) MBO. Although the tunability is reduced due to the presence of non-tunable MBO, the increased Q-factor extends the varactor’s availability for low-loss and high-power applications. |
Journal or Publication Title: | Crystals |
Volume of the journal: | 11 |
Issue Number: | 7 |
Place of Publication: | Darmstadt |
Publisher: | MDPI |
Collation: | 12 Seiten |
Classification DDC: | 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik |
Divisions: | 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) |
Date Deposited: | 03 Sep 2021 12:32 |
Last Modified: | 25 Nov 2022 11:46 |
DOI: | 10.26083/tuprints-00019437 |
Corresponding Links: | |
URN: | urn:nbn:de:tuda-tuprints-194371 |
Additional Information: | Keywords: barium strontium titanate (BST); magnesium borate; acoustic resonances; electrostriction; bulk-ceramics |
URI: | https://tuprints.ulb.tu-darmstadt.de/id/eprint/19437 |
PPN: | 485289687 |
Export: |
![]() |
View Item |