File:Figure D-11 Long-wire antenna (FM 7-93 1995).gif

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Drawing of a "long wire antenna", a directional radio antenna used for communication in the high frequency (shortwave) bands, from a U.S. Army field manual. This is actually a type of antenna called a Beverage antenna. It consists of a random length of horizontal wire from 1-2 wavelengths long, terminated at one end by a resistor equal to the characteristic impedance of the antenna, about 600 ohms, with the receiver connected to the other end. The resistor is attached to a second parallel wire below the first, which functions as a counterpoise, an artificial "ground". It is a nonresonant antenna, and so is broadband, sensitive to a wide band of radio frequencies. The main lobe, its direction of greatest sensitivity, is to the right, parallel to the wire, off the end that has the resistor.

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Summary

Description	Drawing of a "long wire antenna", a directional radio antenna used for communication in the high frequency (shortwave) bands, from a U.S. Army field manual. This is actually a type of antenna called a Beverage antenna. It consists of a random length of horizontal wire from 1-2 wavelengths long, terminated at one end by a resistor equal to the characteristic impedance of the antenna, about 600 ohms, with the receiver connected to the other end. The resistor is attached to a second parallel wire below the first, which functions as a counterpoise, an artificial "ground". It is a nonresonant antenna, and so is broadband, sensitive to a wide band of radio frequencies. The main lobe, its direction of greatest sensitivity, is to the right, parallel to the wire, off the end that has the resistor.
Date	3 October 1995
Source	Downloaded from U.S. Army Field Manual No. 7-93: Long Range Surveillance Unit Operations, Appendix D: Communications, fig. D-11 on [globalsecurity.org] website.
Author	U.S. Army

Licensing

This file is a work of a U.S. Army soldier or employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, it is in the public domain in the United States.

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	16:04, 8 February 2010		550 × 361 (36 KB)	Cerebellum	== Summary == {{Information \|Description={{en\|1=Figure D-11 from [http://www.globalsecurity.org/military/library/policy/army/fm/7-93/Appd.htm#top U.S. Army Field Manual 79-3].}} \|Source=http://www.globalsecurity.org/military/library/policy/army/fm/7-93/fi