دراسة تأثير المادة العازلة على المخطط الإشعاعي لهوائي بوقي باستخدام طريقة FDTD
Abstract
تُقدِّم هذه المقالة النتائج النظرية و العملية لتأثير المادة العازلة ذات السماحية الكهربائية النسبية الكبيرة على المخطط الإشعاعي لهوائي بوقي هرمي.
تم إضافة مادة عازلة بشكل قطع مكافئ تقريباً، ذات سماحية كهربائية نسبية على فتحة هوائي بوقي يعمل في المجال، ولوحظ من الدراسة النظرية باستخدام طريقة الفروقات المنتهية في مجال الزمن finite-difference time-domain (FDTD) أن إضافة المادة العازلة يغيّر من التوزيع الصفحي، وبالتالي الاستطاعة على فتحة البوق، مما أدى إلى زيادة في الاتجاهية عند المنطقة البعيدة وتقليل مستوى اللوبات (الفصوص) الثانوية.
تم دعم النتائج النظرية التي سُجِّلت في المستويين E و H بالنتائج العملية لدراسةٍ أُجريت على هوائي بوقي مساحة فتحته .
This study provides theoretical and experimental effects of dielectric materials on the radiation pattern of horn antenna. A parabolic shape of dielectric media was placed on the aperture of the horn antenna.
Three-dimensional horn was modeled using (FDTD) method. Near-and far field results showed that the dielectric changed the phase and the power distribution across the aperture of the horn.
The experimental results for an E-plane and H-plane of
aperture horn antenna are presented and compared with the theory.
Measured and theorized radiation patterns indicated that the dielectric improved the directivity and reduced the level of side lobes in H-plane.
Downloads
Published
How to Cite
Issue
Section
License
Copyright (c) 2019 ttps://creativecommons.org/licenses/by-nc-sa/4.0/
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
The authors retain the copyright and grant the right to publish in the magazine for the first time with the transfer of the commercial right to Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series
Under a CC BY- NC-SA 04 license that allows others to share the work with of the work's authorship and initial publication in this journal. Authors can use a copy of their articles in their scientific activity, and on their scientific websites, provided that the place of publication is indicted in Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series . The Readers have the right to send, print and subscribe to the initial version of the article, and the title of Tishreen University Journal for Research and Scientific Studies - Engineering Sciences Series Publisher
journal uses a CC BY-NC-SA license which mean
You are free to:
- Share — copy and redistribute the material in any medium or format
- Adapt — remix, transform, and build upon the material
- The licensor cannot revoke these freedoms as long as you follow the license terms.
- Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- NonCommercial — You may not use the material for commercial purposes.
- ShareAlike — If you remix, transform, or build upon the material, you must distribute your contributions under the same license as the original.
- No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.