9. If the reflection coefficient (r) is 0.5, calculate the VSWR.

EXPERIMENT 5 • Measurement of Impedance (Use component #507 - termination - as an additional load): Please do the following: 1. Record all your work in your individual lab notebook in an orderly fashion. 2. Write a group formal report in which all group/team members participate fully. Use the formal lab report format provided! Your report must address all the questions, objectives, etc. in the handout. Please DO NOT forget RESULTS and CONCLUSIONS!

In the given figure 2, simulated and measured S11 plots of an antenna designed are given. i. Simulated without defected ground structure (DGS), ii. simulated with DGS, iii. Measured with DGS. State the impedance bandwidth of these three S11 plots and the points where resonances occur in each plot. 13. $11 (dB) -10 -20 -30 -40 24 26 28 Simulated without DGS Simulated with DGS -Measured with DGS 30 32 Frequency (GHz) Figure2: S11 vs. frequency plot of the antenna. 34 36 38 40

11 The load impedance (ZL) of 60- j80 Q terminates a transmission line with a characteristic impedance (Zo) of 50 Q. A parallel short-circuited stub is used to match the line to its load. Use the Smith Chart to calculate: a) the normalised load impedance, load reflection coefficient |L|, voltage- standing-wave-ratio (VSWR), b) normalised load admittance (YL), stub admittance (y2), c) the distance of the stub from the load 'd', d) length of the stub 'L'. matched line (y,+ y₁ =1) 32=jb y₁ =1-jb [5] [5] [5] [5]