antenna length
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Antennas Crossed Field Antenna
 The Crossed Field Antenna (CFA) is one of the applications of Correction of Maxwell's Equations which was used over 150 years ago which was proved these days that the Magnetic Field Source is only the Displacement Current not the Conduction Current .
These Corrections was made by an Egyptian Doctor Engineer Fathi Kabbary , who reached the New Correct Theory which shows that the height and efficiency of the antenna doesn't depend on the wavelength
[ Hits: 2146  Votes: 5  Rating: 2.80 ]
 LinearLoaded Inverted V
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 How do you fit a full length 160 meter antenna into a 40 foot deep yard?
[ Hits: 21974  Votes: 7  Rating: 6.72 ]
 Double Extended Zepp Antenna
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 This double extended Zepp provides 3 db gain over a dipole on the band it is designed for. Each side or leg is about 5/8 wavelength long.
[ Hits: 25124  Votes: 26  Rating: 6.15 ]
 7 Elements YAGI for 144 Mhz
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 The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz
SSB/MGM band, in PDF Format
[ Hits: 40242  Votes: 39  Rating: 5.99 ]
 QM5 Yagi for 2 meters band
 The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for SporadicE and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
[ Hits: 6509  Votes: 4  Rating: 5.25 ]
 QM7 7 elements 144 MHz YagiUda Antenna
 The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for SporadicE and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
[ Hits: 5202  Votes: 15  Rating: 5.27 ]
 Amateur Vertical Antenna Calculator
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 This basic calculator is designed to give the aproximate length (height) of a particular vertical antenna, for the frequency and wavelength chosen.
[ Hits: 43629  Votes: 183  Rating: 5.38 ]
 The G5RV Antenna System ReVisited
 The original G5RV antenna system consists of a centerfed horizontal 102' wire plus a 34' length of openwire 525Ohm feeder. Louis Varney, the antenna system's developer, intended two other features. Learn more at Cebik website
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 Yagi Element Mounting Considerations
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 One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
[ Hits: 4088  Votes: 2  Rating: 8.50 ]
 Thinking about Ideal Loops
 Loop antennae have been used from ELF to UHF since the beginning of radiocommunications. At low frequencies, the main problem for loop antennae is to have enough sensitivity; the antenna being very small respect to the wavelength the collected energy is also small. To increase the output level the loop may be made resonant, so loosing it%u2019s intrinsic aperiodic characteristics.
[ Hits: 1960  Votes: 0  Rating: 0.00 ]
 Moxon Rectangle Calculator
 Program to calculate the dimentions of a Moxon Rectangle.
All equations correlated to NEC antenna modeling software for wire diameters from 1e5 to 1e2 wavelengths.
[ Hits: 5652  Votes: 20  Rating: 5.68 ]
 A Portable MultiBand Magnetic Loop Antenna
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 Described here is a simple multiband magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible
[ Hits: 33016  Votes: 9  Rating: 6.11 ]
 Cubical Quad Antenna Design
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 By N6VNG, can be used to determine the element lengths and the gamma match values for different frequencies, includes link to excel files with formulas to dimension your quad antenna.
[ Hits: 29830  Votes: 80  Rating: 5.80 ]
 How to build a tuned loop antenna
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 How can you vastly improve your Medium Wave reception? its quite simple really, all you need is 120 foot of wire, a few lengths of timber and an old tuning capacitor with which you can build the answer to every DX'ers prayers, a tuned loop antenna.
[ Hits: 22474  Votes: 17  Rating: 7.95 ]
 Long Loopstick Antenna
 Wound on a 3 foot length of PVC pipe, the long loopstick antenna was an experiment to try to improve AM radio reception without using a long wire or ground.
[ Hits: 4112  Votes: 1  Rating: 10.00 ]
 Interference Cancelling System
 The use of interference signal cancellation has been around for some time. The idea is to use an auxiliary antenna almost any random length of wire in addition to the main receiving antenna
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 Random length wire antennas
 Random Length Wire Antennas by WØIPL
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 LF/VLF Portable Loop Antenna
 The octoloop antenna is a length of 25 pair telephone wire inside an octagonal loop shield of 3/4 hard copper pipe
[ Hits: 3447  Votes: 11  Rating: 5.08 ]
 Dominion Radio Astrophysical Observatory
 operates the sevenantenna Synthesis Telescope (ST), the 26meter Telescope, and the 10cm Solar Flux Monitor. It is a member of the Canadian Galactic Plane Survey , a project to map 60 degrees of the Galactic plane at numerous wavelengths with a uniform sensitivity.
[ Hits: 427  Votes: 1  Rating: 1.00 ]
 Wavelength USA
 Hamsticks, mobile and base antennas
[ Hits: 1224  Votes: 2  Rating: 6.50 ]
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