أثر القفز الترددي في مميزات عمل الهوائيات المتلائمة

Authors

  • علي احمد
  • تاج الدين جركس
  • عبد المنعم غانم

Abstract

بهدف رفع مؤشر الحماية من التشويش لمنظومات الاتصال نستخدم القفز الترددي مع الطيف المنشور.

عند استخدام القفز الترددي مع طرق أخرى كاستخدام الهوائيات المتلائمة تتأثر مواصفات الهوائي وبصورة خاصة " مخطط الإشعاع " مما يؤدي إلى صعوبة في تمييز الإشارة من التشويش ولاسيما عند أطراف مجال العصبة الترددية.

بحثنا هذا يؤكد أن القفزة الترددية تؤدي إلى انزياح مخطط الإشعاع على نحو يخرج عن الزاوية المعدة لاستقبال الإشارة إلى الزاوية التي تكون فيها نسبة الإشارة إلى التشويش أقل بكثير بحيث يعود تلقائياَ إلى نطاق صفر مخطط الإشعاع.

This purpose of this research is to Increase protection pointer of communication system jamming by using Frequency-Hopped and Encyclical specter.

Using Frequency-Hopping and adaptive antennas with each other will effect frequency- Hopping Antenna Characteristics, specially the (Radiation Pattern). This means it is difficult to distinguish between signal and jamming, especially at the limits of frequency band domain.

Our search confirms that the Frequency-Hopping leads to dislodgment of radiation pattern far away from the prepared angle to receive the signal to an angle where signal to jamming ratio would be much less.

Downloads

Published

2019-01-24

How to Cite

1.
احمد ع, جركس تا, غانم عا. أثر القفز الترددي في مميزات عمل الهوائيات المتلائمة. Tuj-eng [Internet]. 2019Jan.24 [cited 2024Nov.27];29(4). Available from: https://journal.tishreen.edu.sy/index.php/engscnc/article/view/7029

Issue

Vol. 29 No. 4 (2007): العلوم الهندسية

Section

Articles

License

Copyright (c) 2019 ttps://creativecommons.org/licenses/by-nc-sa/4.0/

Creative Commons License

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:

  • 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.

Most read articles by the same author(s)

<< < 1 2