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Problem Set #4

The document presents Problem Set #4 for the EEC222 Microwave Engineering course, detailing two questions related to power calculations in a directional coupler and the design of a T-junction divider. Question #4.1 involves calculating output powers at various ports of a coupler given specific parameters. Question #4.2 requires designing a lossless T-junction divider with a specified power split and impedance matching.

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15 views2 pages

Problem Set #4

The document presents Problem Set #4 for the EEC222 Microwave Engineering course, detailing two questions related to power calculations in a directional coupler and the design of a T-junction divider. Question #4.1 involves calculating output powers at various ports of a coupler given specific parameters. Question #4.2 requires designing a lossless T-junction divider with a specified power split and impedance matching.

Uploaded by

ramymohamed7801
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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Higher Technological Institute/10th of Ramadan City

Department of Electrical & Computers Engineering


Course: EEC222 Microwave Engineering
Instructors: Dr. Amaal Ashraf & Eng. Mohamed Mohy

Problem Set #4
Question #4.1
A 20 dBm power source is connected to the input of a directional coupler having a
coupling factor of 20 dB, a directivity of 35 dB, and an insertion loss of 0.5 dB. If all
ports are matched, find the output powers (in dBm) at the through, coupled, and isolated
ports.

Solution:
Higher Technological Institute/10th of Ramadan City
Department of Electrical & Computers Engineering
Course: EEC222 Microwave Engineering
Instructors: Dr. Amaal Ashraf & Eng. Mohamed Mohy

Question #4.2
Design a lossless T-junction divider with a 30 Ω source impedance to give a 3:1 power
split. Design quarter-wave matching transformers to convert the impedances of the output
lines to 30 Ω. Determine the magnitude of the scattering parameters for this circuit, using
a 30 Ω characteristic impedance.

Solution:

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