![]() ![]() ![]() Design, simulate and tune a monopole that could be fabricated starting from a commercial coaxial cable (RG-58 or RG-316). The metal is PEC and the relative dielectric constant of the dielectric must be chosen as part of the solution of the exercise. The cable type is RG-58 if the last digit of your matriculation number is between 0 and 4 and RG-316 otherwise. Design and simulate a coaxial cable having a characteristic impedance Z 0 = 50Ω also the reference impedance is 50Ω. Figures can be 2D or 3D and must clearly illustrate the radiation pattern. Plot two or three figures to show the radiation pattern at the resonance frequency f 0 . Different choices are acceptable and welcome, but the resulting figures must clearly show the fields. A good choice may be to select "Fields on Plane" (and the plane must contain the wire or be perpendicular to the wire) and then select either "Contour" or "Arrows". Plot two or three figures to show the electric and magnetic fields at the resonance frequency f 0 . Plot the reflection coefficient ( S 11 ) and the antenna input impedance (real and imaginary part) in the frequency range used for the simulations. In order to decrease the number of "meshcells", it is important to take advantage of the right "symmetry planes" available in the "boundary conditions" and also the ground plane can be introduced by means of a boundary condition (as a perfect electric conductor). ![]() ![]() The ground plane has the shape of a disk or a rectangle and its radius or side is larger than half-wavelength. The monopole is a wire having a radius of 0.2 cm and both the wire and the ground plane are made of PEC (Perfect Electric Conductor). D GHz, where D is the last digit of your matriculation number. By means of CST design, simulate and tune a quarter-wave monopole (whose length is about λ /4 ) resonating at the frequency f 0 = 2. ![]()
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