ELEC 432 Spring 2017 Midterm Exam #2 19 April 2017 Name:________________________________ You may use your notes, textbook, homework solutions, calculator, iPad, and computer for this take home examination. Teamwork is not permitted on this examination. The university academic integrity policy will be strictly enforced. Failure to comply with the academic integrity policy will result in a zero for this examination. Show all work. Each question is worth 25%. Good Luck! ______________________________________________________________________________ 1. Impedance match a complex load of ZL = 25 + j30 Ω to a 50 Ω source impedance using a two element L-C matching L-type network. Remember to perform conjugate matching for maximum power transfer. Determine the component values if the frequency of operation is 330 MHz. Show work on the Smith Chart. ELEC 432 Spring 2017 Midterm Exam #2 19 April 2017 Name:________________________________ 2. Design a fifth order Chebyshev low-pass filter using microstriplines using Kuroda’s Identities to meet the following specifications: Cut-off frequency fc = 2.4 GHz, Zs = ZL = 50 Ω. Simulate and plot S11 Smith Chart, S22 Smith Chart, and S21 using ADS; all for a frequency range of 10 MHz to 5 GHz. Place a marker at 2.4 GHz. ELEC 432 Spring 2017 Midterm Exam #2 19 April 2017 Name:________________________________ 3. Design a third order Butterworth high-pass filter using discrete components to meet the following specifications: Cut-off frequency fc = 270 MHz, Zs = ZL = 50 Ω. Simulate and plot S11 , S22 , and S21 using ADS; all for a frequency range of 10 MHz to 1000 MHz. Place a marker at 270 MHz. ELEC 432 Spring 2017 Midterm Exam #2 19 April 2017 Name:________________________________ 4. For a load of 20 Ω, use a single stub tuner on an FR-4 PCB with εr = 4.7 to match to a 50 Ω generator. The frequency of operation is 400 MHz. Determine the distance in mm from the load to the stub, and the length in mm of the stub. Show all work on the Smith Chart on the following page, and draw the resulting single stub tuner circuit with all distances labeled. Confirm with ADS and attach ADS results including S11 Smith Chart, S22 Smith Chart, and S21 frequency response; all for a frequency range of 10 MHz to 800 MHz. Place a marker at 400 MHz.