Tunable microwave integrated circuits using BST thin film capacitors with device structure optimization

被引:14
作者
Xu, HT [1 ]
Pervez, NK [1 ]
York, RA [1 ]
机构
[1] Univ Calif Santa Barbara, Dept Elect & Comp Engn, Santa Barbara, CA 93106 USA
关键词
barium strontium titanate; BST; tunable filter; MMIC;
D O I
10.1080/10584580500413681
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
The mechanism of losses in barium strontium titanate (BST) thin film capacitors is analyzed at the device level. A geometry dependent RF model is used to minimize the electrode loss. Results show the capacitors' RF quality factors can be further optimized through geometry. A tunable filter and a phase shifter are demonstrated using these design techniques. Successful integration of the BST process with GaN HEMT circuits in the form of a 5 GHz GaN HEMT oscillator is presented. BST thin film technology is shown to be useful for the design of frequency agile circuits and reduction of layout areas in various microwave applications.
引用
收藏
页码:27 / 35
页数:9
相关论文
共 4 条
[1]  
Adler D., 1991, IEEE MTT S INT MICR, P265
[2]   High tunability barium strontium titanate thin films for rf circuit applications [J].
Pervez, NK ;
Hansen, PJ ;
York, RA .
APPLIED PHYSICS LETTERS, 2004, 85 (19) :4451-4453
[3]   CAD MODELS OF LUMPED ELEMENTS ON GAAS UP TO 18 GHZ [J].
PETTENPAUL, E ;
KAPUSTA, H ;
WEISGERBER, A ;
MAMPE, H ;
LUGINSLAND, J ;
WOLFF, I .
IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, 1988, 36 (02) :294-304
[4]   Integration of BaxSr1-xTiO3 thin films with AlGaN/GaN HEMT circuits [J].
Xu, HT ;
Pervez, NK ;
Hansen, PJ ;
Shen, LK ;
Keller, S ;
Mishra, UK ;
York, RA .
IEEE ELECTRON DEVICE LETTERS, 2004, 25 (02) :49-51