Abstract
The optimization of mode excitation coefficients in linear periodic arrays of multi-mode antenna elements is studied for grating lobe reduction. A novel beamforming architecture is proposed with a new optimization problem based on equi-amplitude element excitations for optimal power efficiency. The capabilities of the proposed synthesis approach on suppressing the grating lobe for wide scan angles, and on maintaining the peak gain at the steering angle are analyzed. A 16-element 0.7-wavelength spaced array of dual-mode circular patch antenna elements is used for demonstration purposes. It is shown that a good performance trade-off is achieved when the excitation amplitude of the high order mode is restricted to a sufficiently large value. The ratio of the peak gain outside the main lobe to the gain at the angle of steering is reduced up to about −15 dB and −14 dB for scanning towards 30 and 45 degrees off-broadside, respectively.
| Original language | English |
|---|---|
| Title of host publication | 2022 16th European Conference on Antennas and Propagation (EuCAP) |
| Publisher | IEEE |
| Pages | 1-5 |
| Number of pages | 5 |
| ISBN (Electronic) | 978-88-31299-04-6 |
| ISBN (Print) | 978-1-6654-1604-7 |
| DOIs | |
| Publication status | Published - 2022 |
| Event | EuCAP 2022: 2022 16th European Conference on Antennas and Propagation (EuCAP) - Madrid, Spain Duration: 27 Mar 2022 → 1 Apr 2022 |
Conference
| Conference | EuCAP 2022 |
|---|---|
| Country/Territory | Spain |
| City | Madrid |
| Period | 27/03/22 → 1/04/22 |
Bibliographical note
Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-careOtherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.
Keywords
- array synthesis
- dual-mode antenna
- grating lobes
- large element spacing
- Particle Swarm Optimization