Abstract
Tunable lowpass and bandpass lumped-element filters employing barium-strontium-titanate (BST)-based capacitors are presented. A new metallization technique is used, which improves the quality factor of the tunable BST capacitors by a factor of two. The lowpass filter has an insertion loss of 2 dB and a tunability of 40% (120-170 MHz) with the application of 0-9-V dc bias. The bandpass filter (BPF) has an insertion loss of 3 dB and a tunability of 57% (176-276 MHz) with the application of 0-6 V dc. The third-order intercept point of the BPF was measured to be 19 dBm with the application of two tones around 170 MHz.
Original language | English (US) |
---|---|
Pages (from-to) | 462-467 |
Number of pages | 6 |
Journal | IEEE Transactions on Microwave Theory and Techniques |
Volume | 51 |
Issue number | 2 I |
DOIs | |
State | Published - Feb 2003 |
All Science Journal Classification (ASJC) codes
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering