A radio system is used to communicate with submerged submarines.
View the step-by-step solution to:

Question

A radio system is used to communicate with submerged submarines. Its

transmitter operates at a frequency of 20 KHz and produces an electric field amplitude of 100 V/m, on the air immediately above the surface of the sea underneath which a particular submarine is. Assuming that Ei is a plane wave propagating normal to the air-sea interface, provide answers to the following questions:


a) Determine the intrinsic characteristic impedances of the air and the sea respectively


b) How much power (in Watts per meter square) does the transmitter shines at the sea surface?


c) How much power (in Watts per meter square) goes into the sea?


d) If for good quality communication the submarine receiver requires an electric field amplitude Et = 1μⅤ/m, determine the largest possible depth h it has to maintain in order to be able to receive the transmitter message.


At 20 KHz the sea water has ε = 81ε0, μ-μ0, and σ = 4 S/m.

Recently Asked Questions

Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

-

Educational Resources
  • -

    Study Documents

    Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

    Browse Documents
  • -

    Question & Answers

    Get one-on-one homework help from our expert tutors—available online 24/7. Ask your own questions or browse existing Q&A threads. Satisfaction guaranteed!

    Ask a Question
Ask Expert Tutors You can ask 0 bonus questions You can ask 0 questions (0 expire soon) You can ask 0 questions (will expire )
Answers in as fast as 15 minutes