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العنوان
Band Addition-Rejection Techniques for the Microstrip Antennas \
المؤلف
El-Mahallawy, Ayman Ibrahim.
هيئة الاعداد
باحث / أيمن إبراهيم المحلاوى
مشرف / حسن الكمشوشى
helkamchouchi@yahoo.com
مناقش / محمد السعيد نصر
مناقش / نورالدين إسماعيل
الموضوع
Electric Communication.
تاريخ النشر
2013.
عدد الصفحات
79 p. :
اللغة
الإنجليزية
الدرجة
ماجستير
التخصص
الهندسة الكهربائية والالكترونية
تاريخ الإجازة
1/12/2013
مكان الإجازة
جامعة الاسكندريه - كلية الهندسة - الهندسة الكهربائية
الفهرس
Only 14 pages are availabe for public view

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Abstract

Microstrip antennas have gained extensive applications in recent times due to their light weight, small size, easy reproduction and integratibility with the circuitry. However in their general form, these antennas are found less suitable for modem communication systems including wireless systems as they can efficiently resonate at a single frequency and exhibit narrow bandwidth and poor gain. Since they can be built inside the wireless br>handsets and does not protrude outside, these are found more suitable structures for modem communication systems. Therefore, extensive work started in recent times to modify these structures to. improve their performance and to find their extensive application in modem communication systems. One of the most common and famous method, to modify the antennas is using a resonator (slots or stubs) integrated into the antenna geometry, where this resonator introduces a new resonance frequency on the spectrum, where the antenna operate. This resonator can be used as bandwidth enhancer, where it can give a second resonance frequency near to the antenna main resonance frequency and hence the bandwidth enlargement is done, or it can be used as a band-rejection technique, where its resonance frequency is chosen to resonate around the unwanted frequency, but in a manner that introduce a notch frequency in the frequency band of the antenna. The aim of this thesis is to Introduce and develop a model and systematic design approach for designing a band Addition-Rejection microstrip antennas for high frequency application. This novel approach guaranteed to achieve accurate results between the simulated and fabricated antennas as demonstrated in the testing and validation performed in The Electronic Research Institute. The advantage of this systematic design approach is the reduction of design’s efforts encountered by the current design methods that depend on trial and error approaches.