Purchase Solution

average magnitude of the Poynting vector from the antenna of a cell phone

Not what you're looking for?

Ask Custom Question

An old analog hand-held cellular telephone operates in the 860 to 900 MHz band and has a power output of 0.600 W from an antenna 10.0 cm long.

a. Find the average magnitude of the Poynting vector 4.00 cm from the antenna, at the location of a typical person's head. Assume that the antenna emits energy with cylindrical wave fronts. (The actual antenna pattern is much more complicated) The cylindrical waves fall off with distance S ∞1/R.

b. The ANSI/IEEE C95.1-1991 maximum exposure standard is 0.57 mW/cm^2 for people living near cellular telephone base stations would be continuously exposed to the radiation. Compare the answer in part A to the standard.

Purchase this Solution
Solution Summary

It shows how to calculate the average magnitude of the Poynting vector from the antenna of a cell phone.

Solution Preview

Please see the attached file.

An old analog hand-held cellular telephone operates in the 860 to 900 MHz band and has a power output of 0.600 W from an antenna 10.0 cm long.

a. Find the average magnitude of the Poynting vector 4.00 cm from the ...

Purchase this Solution
Free BrainMass Quizzes
Basic Physics

This quiz will test your knowledge about basic Physics.

Introduction to Nanotechnology/Nanomaterials

This quiz is for any area of science. Test yourself to see what knowledge of nanotechnology you have. This content will also make you familiar with basic concepts of nanotechnology.

Variables in Science Experiments

How well do you understand variables? Test your knowledge of independent (manipulated), dependent (responding), and controlled variables with this 10 question quiz.

Classical Mechanics

This quiz is designed to test and improve your knowledge on Classical Mechanics.

The Moon

Test your knowledge of moon phases and movement.

View More Free Quizzes
Related BrainMass Solutions

  • Global Entrepreneurship

    Find the average magnitude of the Poynting vector 4.00 cm from the antenna, at the location of a typical person's head. Assume that the antenna emits energy with cylindrical wave fronts.

  • Contingency Allowance

    503775 Contingency Allowance Contingency Allowance: A company is developing a new cell phone and is trying to determine cost estimates for parts and labor for each phone.

  • Poynting Vector on the surface of current carrying conductor

    170251 To find the value and direction of the Poynting vector at the surface of a current carrying wire and show that the total power entering the wire per unit length is (I^2)R.

  • The Poynting Vector and Power Dissipation

    170250 The Poynting Vector and Power Dissipation Consider the integral of the inwardly directed normal component of the Poynting vector over a surface S bounding a volume V of a linear, isotropic, homogeneous, conducting medium.

  • Physics: Find the Poynting vector

    401439 Physics: Find the Poynting vector An infinite wire having current I oriented along z-axis passes through a small hole in a uniformly charged infinite plane at z = 0.

  • Analysis of the link budget for a FM Analog telephone link

    A base station transmits a signal with a power of 1 watt to an antenna with a gain of 10 dB. The signal is received by a cell phone 2 km away with an antenna gain of 0 dB. a.

  • Verify that the electric field satisfies a given wave equation

    This response verifies the satisfaction of an electric field and calculates the Poynting vector.

  • Solving pointing vectors

    Pointing vector, vector(S) = vector (E) x vector(B)/mu_o In case of EM waves, average value of poynting vector, = (1/2)*epsilon_o * c * Eo^2 = 0.5*8.86*10^(-12) * 3*10^8 * 193.96^2 = 49.9976 == 50 W/m^2 --Answer 3.

  • Peak electric field in the wave

    Please see attached file for proper formatting: Solution: The power that passes through a sphere of radius R is given by: Power = S * (4πr2) --- (1) Where, S = the average value of the Poynting Vector r = the radius of the sphere

View More Related Solutions