Broadband Planar Antennas and Metamaterials for Antenna Applications
| Autor: | Shiou-Li Chen, 陳秀莉 |
|---|---|
| Rok vydání: | 2004 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 92 In this thesis, the design and measurement of novel antennas and broadband transition are separately proposed in three sections, including the impedance matching technique, the broadband antennas and, antenna application of metamaterial. The specific properties of the radiated structure composing metamaterial elements and series-fed printed-strip dipole pair is investigated. The composite circuits can support the beam-scanning characteristic. We proposed three broadband antennas, which are linearly tapered slot antenna, series-fed printed dipole array and ultra wide-band (UWB) planar tapered loop antenna. On the basis of careful design and optimization, these antennas feature a very broad bandwidth. The planar transition transforming from the unbalanced conductor-backed coplanar waveguide (CBCPW) to balanced coplanar stripline (CPS) is applicable to the 180° feed networks for balanced antenna applications. Compared to other traditional transitions, this configuration is compact in size and no need for vias. Therefore, the transition is suitable for various broadband antennas and mixers applications. These proposed antennas have the advantages of uniplanar configuration, allowing it to be readily integrated with other microwave devices. These structures are useful in practical broadband and compact applications. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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