Abstract
Two novel high selectivity wideband balanced filters based on open/shorted stubs with multiple transmission zeros are proposed in this brief. Two and four transmission zeros near each passband for the differential mode (DM) can be easily achieved for two balanced filters. In addition, the common mode can be suppressed with three and five transmission zeros with an insertion loss greater than 15 dB/20 dB over a wide frequency band. Two prototypes with 3-dB fractional bandwidths of 67.6% and 37.8% for the DM with an insertion loss greater than 15 dB (7.0–12.7 GHz) are designed and fabricated. A good agreement can be observed between the measured results and the theoretical expectations.
| Original language | English |
|---|---|
| Article number | 7277010 |
| Pages (from-to) | 1182-1186 |
| Journal | IEEE Transactions on Circuits and Systems II: Express Briefs |
| Volume | 64 |
| Issue number | 10 |
| Online published | 25 Sept 2015 |
| DOIs | |
| Publication status | Published - Oct 2017 |
Research Keywords
- Balanced filter
- Bandwidth
- Differential/common mode
- Open/shorted stubs
- Transmission zeros
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