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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Mohamad, S. Cahill, R. Fusco, V. |
| Copyright Year | 2013 |
| Description | Author affiliation: Inst. of Electron., Commun. & Inf. Technol. (ECIT), Queen's Univ. Belfast, Belfast, UK (Mohamad, S.; Cahill, R.; Fusco, V.) |
| Abstract | In this paper we investigate the azimuthal pattern symmetry of an Archimedean spiral antenna which is designed to operate over the frequency range 3-10 GHz. The performance of the spiral in free space is compared with a structure that is backed by a perfect electric conductor with a separation distance of λ/4 at the operating frequencies. The latter arrangement exhibits a higher gain, however it is observed that the radiation patterns are less symmetrical about boresight and this performance degradation increases with frequency. The predicted 3 dB beamwidth difference is shown to vary between 14° (3 GHz) and 51° (10 GHz). An improved antenna design is described which reduces the pattern asymmetry to ≈ 2° at 10 GHz. The reduction in modal contamination is obtained by inserting slots carefully arranged in a radial pattern to disrupt the surface currents that flow on the ground plane of the antenna. |
| Sponsorship | IEEE Antennas Propagation Soc. |
| Starting Page | 3963 |
| Ending Page | 3967 |
| File Size | 1847903 |
| Page Count | 5 |
| File Format | |
| ISBN | 9781467321877 |
| e-ISBN | 9788890701832 |
| e-ISBN | 9788890701818 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2013-04-08 |
| Publisher Place | Sweden |
| Access Restriction | Subscribed |
| Rights Holder | EurAAP |
| Subject Keyword | Spirals Archimedean spiral antenna UWB antennas spiral antennas cavity backed antennas Solids Cavity resonators self-complementary antennas Gain Antenna radiation patterns |
| Content Type | Text |
| Resource Type | Article |
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