RF Micro Switch and Variable Capacitor with Feedback Control Loop
| Autor: | Chien-hsun Lai, 賴建勳 |
|---|---|
| Rok vydání: | 2001 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 89 The purpose of this project is to design, analyze, and use the Micro-Electro-Mechanical System (MEMS) technologies to build the PZT high-frequency switch and the variable capacitor with the feedback control loop. According to the simulation of the displacement of the switch by the Finite Element Method, by applying 5~10V actuation voltage to each PZT actuating beams causes these beams moving upward or downward in order to achieve the two-way switching choices (ON/OFF). In the high frequency transfer mode, ON state has a very low Insertion Loss. In the low frequency transfer mode, Signal Isolation can be achieved under the OFF state. Base on the architecture of the PZT high-frequency switch, the capacitor have a wide variable range of capacitance value, between 2~80 pF. Applying the tunable capacitor to a filter, in conjunction with the feedback circuitry, the values of the capacitor will continuously change, which implies the input range of the filter, is continuous and controllable |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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