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| Content Provider | IET Digital Library |
|---|---|
| Author | Ojha, Anuj Kumar Vijayaraghavan, Praveen Kumar Ambattu |
| Abstract | A cylindrical dielectric resonator antenna (DRA) has been excited with a microstrip line in the HEM11 δ mode. It is demonstrated that at the operating frequency, minimum cross-polarisation occurs when the lateral dimension of the substrate is slightly higher than half a free-space wavelength (λ 0). This occurs when direct waves from the DRA interfere appropriately with the waves that are diffracted from the substrate edges. For a 50 Ω microstrip-fed cylindrical DRA, numerical prediction suggests a substrate of lateral dimension 0.58λ 0 for the lowest possible cross-polarisation. In addition, the above optimum substrate size is constant irrespective of the substrate shape (square or circle) or dielectric resonator (DR) properties (permittivity and aspect ratio) for a given substrate permittivity. Numerical results are experimentally verified for a DRA with permittivity 24 and aspect ratio 1.33, for both square and circular substrates at the respective operating frequencies. |
| Starting Page | 246 |
| Ending Page | 251 |
| Page Count | 6 |
| ISSN | 17518725 |
| Volume Number | 13 |
| e-ISSN | 17518733 |
| Issue Number | Issue 2, Feb (2019) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-map/13/2 |
| Journal | IET Microwaves, Antennas & Propagation |
| Publisher Date | 2019-01-09 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Antenna Accessory Antenna Feeds Antenna Radiation Pattern Aspect Ratio Circular Substrates Cylindrical Dielectric Resonator Antenna Dielectric Resonator Antenna Direct Waves DR Property Electromagnetic Wave Polarisation Free-Space Wavelength HEM11δ Mode Lateral Dimension Microstrip Antenna Microstrip Line Microstrip-fed Cylindrical DRA Microstrip-fed Cylindrical DRAs Minimum Cross-Polarisation Numerical Analysis Numerical Method Numerical Prediction Operating Frequency Optimum Substrate Size Other Dielectric Application And Device Photonic Technology Single Antenna Substrate Edge Substrate Permittivity Substrate Size Selection Waveguide And Microwave Transmission Line |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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