The wireless communication devices became very important. They have been fastly
developed fastly in the last few years, so, it was necessary to propose new types Antenna .
A new printed patched Antenna design as, printed, a lenses and wire Antenna,
are
objected to improve the performance, gain and beam width of Antenna.
This work propos a design and simuling of patch fractal Antenna, using Zeland. This
type which depends on fractal geometry (sierpinski carpet) has a very good radiation
pattern and has wide applications.
The proposed Antenna parameters were studied by the help of Zeland simulator, The
variation of the antenna parameters happens when the fractal parameters (as stage of
growth) changes, were analysed.
Finally, the proposed Antenna was praticly applied and measured at the frequency
10Ghz allowed by the microwave and Antenna laboratory.
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.
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.
