تشكل مستقبلات قياس التردد اللحظية عنصراً أساسياً في نظم الحرب الإلكترونية، نظراً لدورها الهام في تحديد و كشف الإشارات المجهولة التردد على مجال ترددي عريض. يهدف هذا البحث إلى تحقيق دقة قياس عالية لمستقبل قياس التردد لحظياً (IFM) على كامل المجال التردد
ي S باستخدام عدة مراحل من المميّزات الطورية المبنية بدارات الأمواج المكروية، و التي تشكل المكوّن الأساسي للجبهة الأمامية الراديوية لهذه المستقبلات.
This thesis investigates a new transmission lines technologie called "Substrat Integrated Waveguide (SIW). SIW takes advantages of rectangular waveguides and microstrip transmission lines, to be used in the construction of low loss microwave circuits.
Over the last few years, the radio frequency (RF) technology has experienced an exponential growth. With the requirement for more integration, new RF wireless architectures are needed. One of the most critical blocks in a wireless transceiver is the
oscillator. Phase noise from radio frequency (RF) oscillators is one of the major limiting factors affecting wireless transceiver performance. Phase noise directly affects short-term frequency stability, Bit-Error-Rate (BER), and phase-locked loop adjacent-channel interference.
This thesis investigates a new transmission lines technologie called "Substrat Integrated Waveguide (SIW). SIW takes advantages of rectangular waveguides and microstrip transmission lines, to be used in the construction of low loss microwave circuits
.
At the beginning of this work, some well known technologies of transmission lines (like microstrip line, rectangular waveguide .... etc.) were studied, to recognize the advantages and disadvantages of each technology, and the applications that could be built by them. Then the structure of the substrate integrated waveguide technology was presented, and the possible propagation modes were studied. In addition, the aproximate equations used in its design were given. After that, a comparison between SIW and rectangular waveguide was done. Interconnections between SIW and other transmission lines (like microstrip line, rectangular waveguide .... etc.) were also studied, to define the structure that gives the lowest possible insertion loss and the widest passband. Finally, we reviewed the important role played by filters in the fields of cellular communications, radar, electronic warfare and satellite systems.
