| Título | Conical-beam travelling-wave array antenna based on slotted circular waveguide at Ku-band |
| Tipo de publicación | Conference Paper |
| Year of Publication | 2019 |
| Autores | Sanchez-Olivares, P., J. L. Masa-Campos, D. Escalona-Moreno, and E. Garcia-Marin |
| Conference Name | Simposium Nacional URSI 2019 |
| Date Published | September |
| Resumen | A high-gain conical-beam travelling-wave array antenna based on a slotted circular waveguide is designed at the higher part of Ku-band (16-18 GHz). The single radiating element is formed by a ring of equally spaced slots fed by a circular waveguide. The excitation of the TM01 mode provides a uniform feeding distribution to each slot, generating an omnidirectional radiation performance. Thus, an array antenna formed by 48 rings of slots is proposed following the conventional design rules of travelling-wave arrays. Every ring is optimized to achieve a uniform power distribution and consequently maximum directivity for the array antenna performance. The distance between elements is also adjusted to obtain the better input matching response and mitigate the grating lobe appearance, generating a high-gain conical-beam radiation performance suitable for satellite communications. The proposed design has been manufactured by using a 3D printing process. Input matching under -15 dB, high-gain values around 13.5 dB or total efficiency higher than 98% have been achieved for the whole frequency band. |
