gain of ham antenna

gain of ham antenna

Antennas : 160M

• 160 meter antenna problems and solutions - The quarter-wave Marconi working against ground is a popular and inexpensive antenna for 160 meters. A lot of newcomers to the band favor this simple antenna because it's easy to put up, it isn't too big, and it works.
  [ Hits: 107 | Votes: 0 | Rating: 0 ]

• 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 Sporadic-E 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: 6869 | Votes: 4 | Rating: 5.25 ]
• QM7 7 elements 144 MHz Yagi-Uda 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 Sporadic-E 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: 5361 | Votes: 15 | Rating: 5.27 ]

• A comparison of 40 meter beam antennas - This page describes a comparison study on seven different beam antennas for 40 meters band. Yagi antennas, moxon antennas, mini horse all antennas are described with schema diagram , azimuth plot and SWR F/B Gain diagram
  [ Hits: 267 | Votes: 0 | Rating: 0 ]

• Portable 70cm Quadruple Quad Beam - A suitable high gain 70cms antenna for SOTA operation was sought that did not have the drawbacks of a long Yagi antenna, principally a narrow beamwidth and bandwidth.
  [ Hits: 3548 | Votes: 3 | Rating: 8 ]

• Inverted Vee monoband antenna - This project will enable you to build a monoband long wire inverted vee with 3/4 wave length sides that will have a bit of gain
  [ Hits: 2263 | Votes: 1 | Rating: 10 ]

• The J-pole Antenna Revisited Yet Again - The dynamics of antenna design
  [ Hits: 3508 | Votes: 1 | Rating: 10 ]
• Improving Gain of the Super J-Pole Antenna - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. Get 0.8 dB more gain out of the trusty Super-J by replacing the traditional phasing stub with a long coil.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]

• The full-wave loop antenna - These omnidirectional antennas offer Horizontal polarization, and about 2.1 dbd of gain. They are much quieter than a dipole or a vertical, have a broader bandwidth and will usually out perform a dipole antenna.
  [ Hits: 5052 | Votes: 4 | Rating: 6.5 ]

• Cavity antennas - Cavity antennas are weatherproof antennas for UHF and microwave frequencies. Require more metal for the same decibels of antenna gain but a cavity antenna is relatively easy to weatherproof.
  [ Hits: 305 | Votes: 2 | Rating: 5.5 ]

• LA1IC Coax-Fed slooping longwire - Simple, inexpensive and easy to erect, this antenna provides directivity, low angle radiation and a small gain on a number of HF bands.
  [ Hits: 3921 | Votes: 3 | Rating: 7 ]

• Calculate antenna gain - Guide to calculate effective gain of antennas
  [ Hits: 10330 | Votes: 96 | Rating: 6.51 ]
• Antenna Gain versus Height - Antenna gain for horizontal, vertical, and tilted orientation of a dipole for heights between 5 and 50 feet.
  [ Hits: 1767 | Votes: 8 | Rating: 4.75 ]
• Wire Loss and Antenna Gain - Discussion at eham about wire size used in wire antennas, and how it affects the gain of the antenna
  [ Hits: 847 | Votes: 0 | Rating: 0 ]

• Lazy H Array Antenna for 40 meter - Make them simple then Make them work. The LAZY H antenna is a general type of antenna that is in the curtain array family. By placing two 1 wavelength dipoles in a plane that is at right angles to the direction of maximum radiation and keeping the proper in-phase current condition to each element, you can achieve a high gain bi-directional antenna.
  [ Hits: 284 | Votes: 3 | Rating: 5.33 ]

• ERP Calculator Plus - ERP Calculator is an Amateur Radio software utility designed to perform a side-by-side comparison of two Ham Radio antenna systems. ERP Calculator comes pre-programmed with data files including published data for several popular brands and types of coax cable as well as several popular antenna system brands and models. ERP Calculator displays values of ERP, Antenna Power Gain, Antenna Feed point Power, Antenna System Gain in dB, Antenna Gain in dBd, SWR Attenuation in dB, SWR Power Attenuation, Coax Loss in dB, and Coax Power Loss
  [ Hits: 3002 | Votes: 9 | Rating: 5.11 ]