How high does a beam antenna need to be?

How high does a beam antenna need to be?

A beam type of antenna at a height of 70 feet or more will provide greatly superior performance over the same antenna at 35 feet, all other factors being equal. A height of 120 feet or even higher will provide even more advantages for long-distance communications.

What is a light beam in the antenna?

The Light Beam Multi-band Antenna has been developed for Hams who want one antenna which enables them to operate on multiple amateur bands. Based on the tried and true Moxon antenna design, the LBM –2X and LBM-3X antennas provide excellent performance on 2 or 3 bands, depending on the model you select.

What is narrow beam antenna?

[′nar·ō ¦bēm an′ten·ə] (electromagnetism) An antenna which radiates most of its power in a cone having a radius of only a few degrees.

Can a CB antenna be to high?

The highest point of your antenna must not exceed one meter above the airport elevation for every hundred meters of distance from the nearest point of the nearest airport runway. Differences in ground ele- vation between your antenna and the airport runway may complicate this formula.

What is wide beam antenna?

A Wide-Beam Antenna for Wide-Angle Scanning Linear Phased Arrays. Abstract: In this letter, a wide-beam (at two main planes) antenna is proposed. To broaden the 3 dB beamwidth of the original antenna, a pair of parasitic patches with metallic vias is creatively arranged on either side of the original radiation patches.

What SWR will damage a radio?

SWR 3.0+:
SWR 3.0+: Performance will be severely affected, and you’re likely to damage your radio with extended transmission use.

Does frequency affect beamwidth?

The width of the beam is inversely related to the frequency. Higher the frequency narrower is the beam. If the beam is wide the echoes from the two adjacent structures will overlap and the image will appear as one.

What is the best length for a shortwave antenna?

Length of Wire I have found that an end-fed outdoor shortwave antenna – 138 feet long (42.05 meters) – will give very good results over much of the shortwave frequency spectrum. If you do not have enough room for a 138 foot end-fed sloper, try a 67 footsloper.

Are short Ham antennas efficient?

Short Ham Antennas For HF You may have heard that short ham antennas are not as efficient, nor as effective as a “full length” half-wave dipole, regardless of the configuration chosen. This Page CoversLinear LoadingDimensionsConstructionBonus Configs Good news! I describe in this article the only exceptionI know of that actually works!

What is a light beam antenna?

Comparing antennas designed for a given Ham band, the Light Beam antennas are 1/4 the width of a normal dipole or Yagi and are 1/2 the size of a fullwave quad antenna. Our design of an extremely strong and light weight support structure results in an antenna system with a low visual impact and is nearly indestructible.

What type of wire is used for outdoor shortwave antennas?

Outdoor Antenna Compromises The end-fed “random-length wire” is the most commonly used because it can be strung up in the air between the receiver and a tall support some distance away from the building where your shortwave receiver is located.