Abstract
A piezoelectric transducer-controlled dual-mode switchable bandpass filter is introduced. A piezoelectric transducer is used to lift up or pull down the attached dielectric substrate perturbation. When the dielectric substrate is pulled down, the perturbation excites dual modes and the dual-mode filter is on. The return loss is better than 10 dB and the insertion loss is less than 3 dB from 2.92 to 3 GHz. When the dielectric substrate is lifted up, the dual-mode resonator is unperturbed and the dual-mode filter is off. The isolation is 21 dB at 3 GHz. The on-off ratio is 18 dB.
| Original language | English |
|---|---|
| Pages (from-to) | 199-201 |
| Number of pages | 3 |
| Journal | IEEE Microwave and Wireless Components Letters |
| Volume | 17 |
| Issue number | 3 |
| DOIs | |
| State | Published - Mar 2007 |
Keywords
- Dual-mode bandpass filter (BPF)
- Piezoelectric transducer
- Switchable