A new cordless phone emits 3.6 mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet. Part A If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone? Express your answer to two significant figures and include the appropriate units. En = Value Units Submit Request Answer Provide Feedback

A new cordless phone emits 3.6 mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet. Part A If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone? Express your answer to two significant figures and include the appropriate units. En = Value Units Submit Request Answer Provide Feedback

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter34: Electromagnetic Waves

Section: Chapter Questions

Problem 34.7P: Suppose you are located 180 in from a radio transmitter. (a) How many wavelengths are you from the...

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Suppose you are located 180 in from a radio transmitter. (a) How many wavelengths are you from the transmitter if the station calls itself 1150 AM? (The AM band frequencies are in kilohertz.) (b) What if this station is 98.1 FM? (The FM band frequencies are in megahertz.)
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Problem 3: A microstrip patch antenna is to be designed and simulated as shown in the figures below, if the substrate used has e,=2.2 and a thickness of 1.115 mm, calculate the following: a) The required width W. b) The effective dielectric constant. c) The electrical increase in patch length. d) The physical length of the patch. Part ut escitin Conturtor paten Lngih Sunstrate Conductor ground plane Roal --- Imaginary 70 60 50 40 30 -15 20 10 -25 -10 -20 20 2.1 2.2 2.3 24 2.5 2.6 2.1 28 2.9 10 -30 2.0 2.1 2.2 2.3 24 25 2.6 2.7 28 29 30 Frequancy (GH] (b) Frequency [GH:] (a) Input impedance of a patch antenna. (b) Refiection coefficient at the port. Impedance (Chm) Reflection coofficiant [dB]