80 Meter Loop Antenna Design

With the antenna calculation program EZNEC the setup is theoretically prepared and documented with the inexpensive antenna analyzer miniVNA or graphically documented. An In-Room 80-Meter Transmitting Multiturn Loop Antenna A little wood some wire and a handful of components can make a directional antenna for indoor use where outdoor antennas are not permitted.


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I had to change the small loop to insert the signal an ad 025 meter with the existing 130 meter for best SWR figures.

80 meter loop antenna design. Phase three was putting up a second loop. In my opinion when constructing antennas not only is the old saying the higher the better true but also. Any antenna tuned for 80 Meters should also work on 20 and 10 meters as well.

The RADIO WORKS SuperLoop 80 is a high performance full size full-wave 80 meter loop antenna. This excellent article covers all aspects of designing a resonant loop antenna examining gain and radiation patterns and describing practical notes on how to build this antenna. If an antenna works on 40.

You may feed this antenna with a 41 balun. If the loop is in the shape of square or large rectangle the SWR can be below 21 but will not get much below 151. This had 4 x 2 inch coils in each corner of the loop with 30 turns of 1mm wire and I stretched the loop all.

CLICK or TAP HERE to read about the successful test and listen to the actual audio recording of the test. This will show the true potential of this fine HF antenna. The original design is from Harry Lythall SM0VPO ref.

Legends theory and practice. To build this antenna you need a lot that is at least 100 feet across. The 80 meter loop is really designed for 80M and 40M.

Target frequency 3700 KHz Calculated value for the capacity 290 pF. The gain is around 4 dBd on 40 mtrs but it will seem much higher due to the very low angle radiation pattern. Since this article was originally published I went to the pesky South Arm NEFR stage and did an official 80-meter NVIS test with four other seasoned operators.

One of this summers projects was to put up a full-wave 80 meter horizontal loop antenna sometimes called a loop skywire. Now we cut the 211 feet of wire in half and attach one wire of the 32 foot 450 ohm ladder-line to each ½ of the 211 foot 1055 foot leg. On 40 meters the SuperLoop 80 is a 2 wavelength open loop or Bi-Square.

80 METER HORIZONTAL SQUARE LOOP. One of my 2008 antenna projects was a square spiral loop antenna for the 80 meter band. This is post 2454 in a continuing series of simple ham radio antennas.

I use about because exact numbers are not that critical according to my results. Because of the narrow bandwidth at 80 m a simple matchbox can help to use the complete bandwidth of the respective band when using transistor transceivers. I found a 60 meter resonance for this 160 loop third harmonic and it did not work as.

This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on the 40 Meter band. 1 Put up the entire length of wire and the 41 balun and resonate it to the upper end of 80 meters by lengthening or shortening it. AmyAI6ZU and I build a magnetic loop antenna for 160 and 80 meter amateur radio.

This antenna is tuned by the following procedure. The AlexLoop and most commercial magnetic loops are designed for low power usually limited to 10 CWDigital or 20 Watts SSB voice. One of this summers projects was to put up a full-wave 80 meter horizontal loop antenna sometimes called a loop skywire.

Using a 160 meter full wave loop in that fashion is likely to be counterproductive. 80 Meter Full Wave Loop Ham Radio Antenna. Coax fed loops will usually have an SWR between 21 and 31.

Conditions have been average lately so it has to get better as the propagation improves. A dedicated 80m antenna. Length of a full-wave 80-meter loop is about 270 feet long 1005 divided by frequency in MHz or about 67 feet per side.

These commercially available loop designs are AMAZING from 30 meters upwards but to keep them a handy size they are too small to have high efficiency down on 40 meters though they are usable down there. Antenna covers all bands 80-10 meters 30 17 12 meter WARC Bands This antenna works as a Full Wave Loop on 80 Meters and also works as a 2 wavelength open loop or Bi-Square on. 2 Check to see that a good SWR can be obtained in or near 160 m.

Rich Rodgers WB5YBZ does a wonderful job of describing this antenna he built for his home station. This is where the standard is set. Some people use open wire line and feed a 80 or 40 meter loop on multiple frequencies.

Watch the following video to see how. Calculated coil value of the loop is 64 uH as explained in de 40 meter band loop. I looked at some of the various web sites and still did not get a single idea as most of the designs were attached to trees houses or towers.

The design frequency the feedpoint impedance will be between 80 and 150 ohms. Band-changing from 80m to 40m was a nightmare though. So our antenna wire is 211 feet and the 450 ohm stub is 32 feet long.

This type of antenna radiates most of its signal at very high angles which is perfect for using Near Vertical Incidence Skywave NVIS propagation to contact stations up to about 500 miles away on the 80 meter band. I have used in this case RG58 with a capacitance of 100 pF meter. So far I had really not been active on 80 meters due to antenna limitations and its perceived suitability for DX I am not interested in local rag chewing.

I am really impressed with the signal strength on 80M and 40M is well above par. The stub in the top leg of the antenna opens the loop when operating on. All OMs owning a plot of 400 sqm or bigger are in the position to built a full size loop antenna for 80 and 40 m.

I decided to build a 80 meter half wave wire antenna that takes full advantage of the phone portion of the band known as 75 meters also this antenna will not need a tuner. In the following the construction of a simple multiband delta-loop antenna for the bands 80-10m is described. Here is the pattern of the 16080 meter antenna on 390 MHz.

As you can see on this picture. The multi band HF loop antenna a good performer on 80 and 40-10 meters. 80 meter loop is 1005365 27534 feet less the ¼ wave-length of 64 feet gives us 21134 feet 211 feet is close enough.

Delta Loop Antenna 80 Meters. Out to the garden lower the loop connect the ends or disconnect them and hoist the loop back up. 80 Meter NVIS Antenna Dont Get Hung Up on Theory.

If you have sufficient space and a few trees then this 80 meter full wavelength loop antenna is for you. This type of antenna radiates most of its signal at very high angles which is perfect for using Near Vertical Incidence Skywave NVIS propagation to contact stations up to about 500 miles away on the 80 meter band.


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