Question

At a nominal operating frequency of 5 GHz, a 50 Ω lossless coaxial line with insulating material with relative permittivity Er-2.2 İs terminated in an antenna with a load impedance of RL-25 Ω in series with a C-pF capacitor. The line length is 30cm. (a) Use a Smith chart to find Zin (b) Now suppose that we need the antenna to operate over a narrow band of +3MHz about the nominal operating frequency of 5GHz. i. Plot ігі as a function of frequency over this band. ii. Plot Zin as a function of frequency on the Smith Chart. (You should see a small arc)

Answer 1