Abstract
This paper proposes a new type of varactor-tuned microstrip quasi-elliptic bandpass filter with improved tuning range. By employing the unique characteristic of the dual-mode open-loop resonator, that is, whose two operating modes (odd-and even-modes) do not couple each other, tuning the passband frequency becomes simple with single DC bias circuit. In addition, by using a wideband transformer, the tuning range of the proposed filter is doubled the previous work [1] while keeping nearly constant absolute-bandwidth. A designed four-pole tunable bandpass filter of this type is demonstrated experimentally. © 2010 EuMA.
| Original language | English |
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| Title of host publication | European Microwave Week 2010, EuMW2010: Connecting the World, Conference Proceedings - European Microwave Conference, EuMC 2010 |
| Pages | 751-754 |
| Number of pages | 4 |
| Publication status | Published - 2010 |
| Event | 13th European Microwave Week 2010: Connectng the World - 40th European Microwave Conference - Paris, France Duration: 28 Sept 2010 → 30 Sept 2010 |
Conference
| Conference | 13th European Microwave Week 2010: Connectng the World - 40th European Microwave Conference |
|---|---|
| Abbreviated title | EuMW2010 and EuMC 2010 |
| Country/Territory | France |
| City | Paris |
| Period | 28/09/10 → 30/09/10 |
Keywords
- Dual-mode resonator filter
- Microstrip filter
- Tunable filter