This thesis presents design, fabrication and testing of a number of multi-frequency
band microstrip-fed re-configurable microstrip patch antennas. All re-configurable
antennas are designed to change from one resonance frequency to another by an
electronic control of RF MEMS switches, one at a time. Besides a fixed size slot on
the patch, switches are placed in insets for satisfying better input match at each
resonance frequency individually. Also some switches are placed into the slot for
adding another resonance frequency to change the effective slot-length like
effective inset length changing.To actuate the RF MEMS switches in the configured way, DC-stubs are also
designed to apply required potential difference between switch ports and the carrier.
These stubs exhibit RF-open at switch side to prevent any RF leakage, and DCground
on the other side. That RF short-to-open conversion is accomplished
together with feed structure / with a taper depending on the feed network selected.
All devices introduced here are built by Microwave Research Group in Electrical
and Electronics Department, Middle East Technical University. Depending on the
sensitivity of structure, some devices are built by RF MEMS group in
Microelectronic Production Plant for MEMS (METU & / #8211 / MET) during the thesis
study. Therefore this study is the continuation of the first national work on
fabrication of RF MEMS devices.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12607969/index.pdf |
| Date | 01 December 2006 |
| Creators | Onat, Sinan |
| Contributors | Demir, Simsek |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
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