Module 9.1: Polarization and Orientation

Given: A cellular phone base station with a vertical dipole antenna at the top, and a cellular phone user nearby.

	Q1.  Imagine someone in their backyard pool, talking on the phone and sunning themselves. Their cell phone is oriented such that the antenna is horizontal, as shown in the figure. Is their reception:
	Q2.  Now consider the same person, who has stood up so that their cell phone is oriented vertically, and moved so that they are directly under the base station antenna, as shown in the figure. Note that the tip of their antenna is pointing directly towards the tip of the base station antenna. Is their reception:
	Q3.  What is a possible reason that cell phone towers were not designed with circularly polarized antennas on them?       power consumption/polarization issues       mutual impedance/pattern issues

Proceed to Module 9.2

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Fawwaz T. Ulaby, Fundamentals of Applied Electromagnetics. Prentice Hall, Upper Saddle River, New Jersey, 2001. Copyright © 2001 Prentice Hall.

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