Abstract
A 3rd-order combline tunable filter with very narrow bandwidth at X-band is implemented utilizing ferroelectric Barium Strontium Titanate (BST) interdigitated varactors. The filter and its varactors are integrated on a ceramic substrate together with a simple resistive biasing circuit. Upon the application of a bias voltage ranging from 0 to 90 V the passband of the filter tuned from 8.127 to 9.973 GHz while maintaining a fractional bandwidth of approximately 4.8-5.9 %. Over the tuning band the passband insertion loss varied from 10.7 dB to 7.5 dB while the return loss was better than 15 dB. The tuning ratio is 23 %.
Original language | English (US) |
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Title of host publication | IMS 2009 - 2009 IEEE MTT-S International Microwave Symposium Digest |
Pages | 1061-1064 |
Number of pages | 4 |
DOIs | |
State | Published - Dec 1 2009 |
Event | 2009 IEEE MTT-S International Microwave Symposium, IMS 2009 - Boston, MA, United States Duration: Jun 7 2009 → Jun 12 2009 |
Other
Other | 2009 IEEE MTT-S International Microwave Symposium, IMS 2009 |
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Country/Territory | United States |
City | Boston, MA |
Period | 6/7/09 → 6/12/09 |
All Science Journal Classification (ASJC) codes
- Radiation
- Condensed Matter Physics
- Electrical and Electronic Engineering