6. The line shown is 3/8A long and its normalized input impedance is Z =- j2.5. (a) What is the normalized receiving or load end impedance, zu? (b) What is the distance from the load to the first voltage minimum? (c) What length of open-circuited line could be used to replace zi? ZG + + VG ~ Va Zo VL ZŁ d 7. Use a shorted 500 shunt stub to match a load = 25 -j50 to a 5002 line. Find the position of the stub d and Length of the Stub L. - d Zo = 50 02 Zo = 50 0 ZL - 25-950 Zo = 50 0 Shorted stub

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]

Question 2 Er For a lossless transmission line, λ = 5.4 cm at 1.6 GHz. find e, of the insulating material. 1 pts 11/n Question 1 Eeff Take Quiz Er A lossless microstrip line uses a 0.9-mm wide conducting strip over a 0.7-cm thick. substrate with E = 1.8. Determine the line parameter Eeff at 9 GHz. = Question 2 (9 1 pts 1 pts For a lossless transmission line, λ = 5.4 cm at 1.6 GHz. find &r of the insulating material. ? Exit Question 3 Take Quiz R 3.85 N/m L = 1.35 x 10-6 H/m G 1.77 x 10-6 S/m C 3.8 x 10-11 F/m = At 1.3 GHz, given a two-wire line with the following parameters: B = rad/m Question 4 At 2.6 GHz, given a two-wire line w following parameters: (9 1 pts 1 pts ? Exit Question 4 R 3.46 2/m L'= 1.23 x 10-6 H/m G = 2.29 x 10-6 S/m C At 2.6 GHz, given a two-wire line with the following parameters: = Take Quiz = Zo = 1.04 x 10-11 F/m Find the characteristic impedance, Zo, and approximate it as being equal to only the real part. (9 Ω 1 pts Question 5 1 pts ? A two wire air line has the following line Exit Take Quiz Question 5 A two wire air line has the following line parameters: R = 0.458 mQ/m L = 2.23 μH/m G = 0 S/m B = C' = 9.8 pF/m For operation at 3.1 kHz, determine the phase constant B. x 10-4 rad/m Question 6 1 pts (9 - 1 1 pts ? A lossless microstrip line uses a 1.3. wide conducting strip over a 0.9-cm thick cubetroto with Dotorming the ling Exit Question 6 Take Quiz B = A lossless microstrip line uses a 1.3-mm wide conducting strip over a 0.9-cm thick substrate with Er = 1.7. Determine the line parameter in rad/m at 13 GHz. = rad/m Question 7 = R 0.425 mQ/m L = 2.56 μH/m G = 0 S/m C = 7.929 pF/m 1 pts A two wire air line has the following line parameters: (9 1 pts ? For operation at 4.8 kHz. determine the Exit