Document Details

Document Type : Thesis 
Document Title :
DESIGN OF HIGH GAIN MICROSTRIP ACTIVE ANTENNA USED AS TRANSMITTER AND RECEIVER WITH LINEAR AND CIRCULAR POLARIZATION
تصميم هوائي نشط عالي الكسب يستخدم كجهاز ارسال واستقبال مع تطبيق الاستقطاب الخطي والدائري
 
Subject : Faculty of Engineering 
Document Language : Arabic 
Abstract : Active integrated antennas AIA are used for frequency generation and the radiation of Radio Frequency RF and microwaves. Because of their compactness and low-cost fabrication, they are suited for several communication applications. Modeling these antennas is a difficult task due to the combination of antenna and amplifier properties. This research is based on three investigations. The first study addresses the joint design problem between a passive antenna and a Low Noise Amplifier (LNA), which are traditionally designed separately. First, we determined the antenna specifications that maximize the energy transfer between these two blocks. Next, we designed the antenna by sharing impedance constraints both in the helpful band and at harmonics between it and the LNA to relax the specifications on the impedance matching network. This approach maintains a high system gain. In order to improve the electrical performances of the designed array patch antenna, we already used a circular polarization which can be allowed to increase the gain, directivity, and return loss of the designed antenna. The second study focuses on the use of parasitic elements to increase the performance of this active antenna in terms of gain; S parameter and to minimize the noise factor to transfer the information perfectly without loss. The third study focuses on testing the designed system in the case of transmission and reception to validate the obtained performances. The test parameters used are the VSWR and the delayed group. Finally, we developed an active integrated antenna based on the collaborative design between a microstrip patch antenna and a low noise amplifier. The results obtained are exciting in terms of reflection coefficient, transmission, gain, and noise figure. 
Supervisor : Prof. Adnan Mohammed Afandi 
Thesis Type : Master Thesis 
Publishing Year : 1443 AH
2022 AD 
Added Date : Sunday, March 20, 2022 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
احمد صالح الزهرانيAlzahrani, Ahmed SalehResearcherMaster 

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 47451.pdf pdf 

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