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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ghali, H.A. Moselhy, T.A. |
| Copyright Year | 1963 |
| Abstract | Based on the use of space-filling curves, broad-band and circularly polarized microstrip-fed slot antennas are proposed. Broad-band performance is achieved through merging different downscaled versions of a composition of "island-like" space-filling slot antennas without increasing the overall antenna size. This technique provides different resonant slot lengths corresponding to a wide range of frequencies. By merging three downscaled versions of a composite second-iteration Moore slot antenna, a broad-band slot antenna is developed. The proposed antenna has a bandwidth (VSWR<2) of 87.6% around 4.5 GHz, which is higher by a factor of 13.5 compared to the square ring slot antenna, and by a factor of 3 compared to the nested square rings slot antenna. The developed slot antenna has a maximum gain of 5 dB and a total area of 3/spl times/3 cm/sup 2/. Furthermore, by introducing asymmetry in the proposed slot antenna, which is implemented by replacing all parallel slots on one side of the structure and all inner slots by a ground plane, circular polarization is achieved. The circularly polarized slot antenna version has a 3-dB axial ratio bandwidth of 22% with VSWR<2. The design and simulation of the proposed slot antennas have been performed using a moment-method-based full-wave electromagnetic simulator. Measurements of fabricated antennas are in good agreement with simulation results. |
| Sponsorship | IEEE Microwave Theory and Techniques Society |
| Starting Page | 1946 |
| Ending Page | 1950 |
| Page Count | 5 |
| File Size | 456607 |
| File Format | |
| ISSN | 00189480 |
| Volume Number | 53 |
| Issue Number | 6 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2005-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Slot antennas Microstrip antennas Merging Bandwidth Electromagnetic wave polarization Resonance Frequency Gain Antenna measurements Electromagnetic measurements space-filling curves Broad-band antenna circularly polarized antenna fractal antenna slot antenna |
| Content Type | Text |
| Resource Type | Article |
| Subject | Condensed Matter Physics Electrical and Electronic Engineering Radiation |
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