IEEE 291-1969

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IEEE Standards Report on Measuring Field Strength in Radio Wave Propagation

Published By	Publication Date	Number of Pages
IEEE	1969	25

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Description

New IEEE Standard – Superseded. Two standard methods for field-strength measurement are described. The standard-antenna method consists of measuring the received power or open-circuit voltage developed in a standard receiving antenna by the field to be measured and computing the field strength from the measured voltage and the dimensions and form of the standard antenna. The standard-field method consists of comparing voltages produced in an antenna by the field to be measured and by a standard field, the magnitude of which is computed from the dimensions of the transmitting antenna, its current distribution, the distance of separation, and effect of the ground. The measurement procedures are outlined, including calibration of commercial field strength and extension of the methods to microwave frequencies. Methods for measuring power radiated from an antenna under several different conditions are briefly presented, and the important considerations for securing useful and accurate measurements are described.

PDF Catalog

PDF Pages	PDF Title
4	1 Introduction 1.1 General 1.2 Symbols and Units
5	2 Methods of Measuring Field Strength 2.1 General 2.1.1 Standard-Antenna hfethod 2.1.2 Standard-Field hlethod 2.1.3 Simplifications and Precmitions
7	2.2 Standard-Antenna SIethod 2.2.1 The Antenna 2.2.2 Calibration Methods
12	2.3 Standard-Field hlethods 2.3.1 Induction-Field >lethod
13	2.3.2 Radiation-Field Method
14	2.4 Calibration of Commercial Field-Strength Meters 2.4.1 Loop-Antenna Calibration
15	2.4.2 Dipole-Antenna Calibration 2.5 Microwave Power Deusity and FieldStrength Measurements 2.5.1 General 2.5.2 Standard-Antenna Method
16	2.5.3 Effective Area of Antennas 2.5.4 Antenna Power Gain Measurement
17	2.5.5 Standard-Field Formulas
18	2.6 Miscellaneous 2.6.1 Accuracy of FieldStrength Measurement 2.6.2 Presentation of the Data of Measurement 2.6.3 Automatic Recording
19	2.6.4 Mobile Recording Methods of Measuring Power Radiated from an Antenna 3.1 General Equivalent Radiated Power for Simple Ground-Based Vertical Antenna
22	3.3 Ground-Wave-Radiated Power Measurements Above About 5 Megahertz
23	3.4 Equivalent Radiated Power for Ionospheric Wave Transmission
24	4 References