Honest Bob's Maple Leaf Communications
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Maple Leaf Communications
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We have tables at most of the hamfests in southern Ontario. Come check us out!

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Our sister company, Paladin RF, offers a line of high-quality duplexers and filters. Their small size, and especially their small prices, will probably surprise you but they are innovative, no-compromise, top-performing products. Check us out!

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Check out our fun page for free stuff! Calculate various antenna dimensions, determine best height above the ground, look up coaxial cable properties, check the ideal stripping dimensions for mounting various connectors, and more.

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Calculator - Full-Wave Wire Loop

Use At Your Own Risk

Maple Leaf Communications assumes no responsibility for material calculation errors or other deficiencies in the calculator offered here.

Installed antennas can be affected by buildings, trees, mast properties, other antennas, ground conditions, and more.

Dimensions reported by this calculator should be considered only approximations of the length(s) of material required.

When ordering materials and building your antenna, allow a little extra length and trim as necessary instead of building and installing the antenna before discovering that it is too short.

Full-Wave Horizontal Wire Loop

A full-wave loop can require a lot of territory, and needs at least several tall supporting structures (trees, towers, etc.) However on the right property, it is an effective, low-noise, omnidirectional antenna.

The loop provides about 2dB of gain when hung in a square shape, but more if the shape of the antenna can be expanded to maximize interior space. Though impractical to hang, a true circle shape would provide nearly 1dB of gain over a square shape.

Theoretical impedance of the loop is 100 ohms, so it should be fed with a matching system designed to lower impedance closer to the 50 ohms of typical coaxial feedlines. One method involves a matching section of 75-ohm coax, carefully-cut so that it matches the dimension provided below after connections have been made. The dimension is calculated using the velocity factor of the 75-ohm coax used.

Enter the frequency of interest below. The dividend factor typically used for calculating full-wave loops is 1005, but it can be adjusted below if desired. The velocity factor input should be correct if the 75-ohm matching stub results will be used.


divided by Frequency in Mhz

Velocity factor of 75-ohm coax used for matching section


Total Length:    or  or 
   
75-ohm
Matching:
Section
   or  or 
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Tram 1154 magnetic mount and 3dB 5/8-wave antenna all in one, 15 feet coax and PL259 connector

Only $39.95!

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We've got another load of fiberglass poles in stock. Ask about our new 9-packs. Details coming soon.

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Deal Item Price
NMO mount
with coax
$5.00
Motorola UHF Antenna (NMO) $20.00
Tap light for
unwired dark spots
50 cents
Various night lights 50 cents
8" velcro straps (5 pieces) $2.00
Alligator test leads, 12" long (5 pieces) $3.00
8" long Black cable ties $0.10 each
Roll of double sided foam tape $2.00

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