gain

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gain

276 links - and 3 categories

Antennas : 10M
  • Two on 10 - A two element beam antenna for ten meters band. This home-brew two-element beam is the perfect introduction to rolling your own gain antenna
    [ Hits: 330 | Votes: 2 | Rating: 8 ]
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 ]
Antennas : 23cm
  • 35 Element Yagi Antenna for 23cm - Antennas for the 1296 MHz based on the construction plans of some Yagis 35 elements by DL6WU, F9FT, DJ9YW. These antennas features a boom of about 3 m and gives a gain of about 17.8 dBd
    [ Hits: 206 | Votes: 1 | Rating: 7 ]
Antennas : 6M
  • Six meter Hentenna - An Hentenna project for the six meters band. The standard size of standard hentenna is width 1/6 wavelength x height 1/2. The antenna build in this project is a full wavelenght antenna for the 50 MHz providing a 6.8 dbi gain.
    [ Hits: 224 | Votes: 1 | Rating: 9 ]
Antennas : 6M : 6 meter Yagi Antennas
  • 6el LFA Yagi for 50MHz - This six element LFA Yagi for six meters has a 1.5 inch square boom with a 1.5 inch secondary boom beneath the first. This ensures the 7.3 metre long boom will not sag and will not require any guying. This antenna has 12.3 dBi Gain and just over 23dB F/B.
    [ Hits: 117 | Votes: 2 | Rating: 4 ]
Antennas : Array
  • Phased Array Antennas - Phased array antennas are composed of multiple individual antenna elements that can have their phase and amplitude controlled to steer the main beam direction in real-time. They are used in radar, communications, and electronic warfare, and offer improved gain and reduced side lobes. A comprehensive document on Phased Arrays include techniques to increase the Antenna Gain and change the Radiation Pattern
    [ Hits: 82 | Votes: 0 | Rating: 0 ]
Antennas : HexBeam
  • HexBeam Antenna Explained - A hexagonal beam is a form of the Yagi antenna which is based on parasitic principles developed early in the last century in Japan for achieving gain in one direction.How HexBeam antennas works. A hexagonal beam operates exactly like Yagi antenna, but instead of a driven element that is straight like a dipole, it is a wire bent into the shape of the letter M.
    [ Hits: 167 | Votes: 0 | Rating: 0 ]
Antennas : Horn
  • What is Horn Antenna - Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
    [ Hits: 74 | Votes: 0 | Rating: 0 ]
Antennas : Loop
  • Quad Loop Antenna for 50 MHz - Building A Full-Wave Quad Loop Antenna for 6 Meters. This is an easy antenna to build and the materials cost about $15-20. It exhibits 1.8dB gain over a 1/2-wave dipole. Using an open-wire parallel feedline (commonly called ladder line) with an antenna tuner, it tunes up on the 10m band as a 5/8-wave loop as well
    [ Hits: 196 | Votes: 1 | Rating: 1 ]
Antennas : Microwave
  • Double BiQuad Antenna for 2.6 GHz - This is basic instructions for homemade 4G Antenna working on 2600 MHz UMTS featuring 13 14 dBi gain. This antenna is desigend to resonate on microwave frequencies in two segments from 2500 to 2570 MHz for Uplink, and from 2620 to 2690 MHz for Downlink.
    [ Hits: 85 | Votes: 0 | Rating: 0 ]
Antennas : Portable
  • The 2BD beam antenna for 20 meters - A light portable 2 element Delta beam antenna for 14 MHz. It is basically a two element delta loop wire antenna made for portable usage providing good directivity and a 4.2 dBd gain
    [ Hits: 183 | Votes: 1 | Rating: 8 ]
Antennas : Quad
  • The Swiss Quad Antenna - Rotatable Antenna with Phased Elements based on the orignal design concept of HB9CV antennas, is considered to have an higher gain than standard quad antennas. The Swiss Quad Antenna does not need any spreader or boom.
    [ Hits: 361 | Votes: 3 | Rating: 7.67 ]
Antennas : Quagi
  • 7 Element QUAGI for Satelitte Operations - In order to increase the gain for satellite opeations, working on 144 MHz bands, the author choose the Quagi design, having restriction of 3 meter lenght for the boom. In Italian
    [ Hits: 143 | Votes: 0 | Rating: 0 ]
Antennas : Theory
  • What We Can Expect from a 2-Element Beam - Method, Units of Measure, and the Dipole Standard of Reference. This article helps in understanding where does beam gain come from in directional aerials like in example Yagi antennas.
    [ Hits: 101 | Votes: 0 | Rating: 0 ]
Antennas : Theory : Antenna Gain
  • Understanding Antenna Gain in a Few Minutes - A collection of videos on antenna gain and explanations of how some antenna designs may perform better than others based on how their radiation pattern is drawn. Understanding how one antenna can gain more in reception and transmission than another can be complicated, but with these videos the author has without any doubt made it easier.
    [ Hits: 84 | Votes: 0 | Rating: 0 ]
Antennas : VHF UHF
  • VHF UHF BiQuad - This is a vertically polarized Broadside and Collinear Array each Loop is a vertically polarized Broadside Array both the right and the left side of the Loop is a bent 1/2 wave dipole working 180 degrees out of phase with the other one and that gives you 4.15dbi of gain
    [ Hits: 174 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-817
  • FT-817 Batteries for Air Travel - Three cell Lipo batteries for the FT-817 work really well, although not really sure about taking them on aircraft. The Lipos intended for use on RC Electric airplanes generally have a very low internal resistance and no internal protection against short circuit.
    [ Hits: 140 | Votes: 0 | Rating: 0 ]
Software : Antenna analysis
  • AN-SOF - Professional Antenna Simulation  updated - AN-SOF is a professional comprehensive software tool for the modeling and simulation of antenna systems. AS-SOF allows to describe antenna geometry, Choose construction materials, Describe the environment and ground conditions, Describe the antenna height above ground, Analize radiation pattern and front-to-back ratio, Plot directivity and gain, Analize input impedance and VSWR,Predict antenna bandwidth
    [ Hits: 240 | Votes: 2 | Rating: 10 ]
  • NEC-Win Plus+ - Developed for beginners, hobbyists, and field engineers. Includes polar plots, rectangular plots for input impedance and VSWR, tabular data, NEC-Win Synth Light and Necvu 3D. Includes NEC2. The program also offers stepped-diameter corrections, Gain Averaging Test, CAD (.DXF) file input, 2-D and 3-D plots and antenna views, and graphical outputs. Run on older Windows version and is out of support.
    [ Hits: 311 | Votes: 2 | Rating: 4.5 ]
Technical Reference : RF Safety
  • RF Exposure Calculator - To use the RF Exposure Calculator, fill-in the form with your operating power, antenna gain, and the operating frequency. Depending on how far above ground the RF source is located, you might want to consider ground reflections too.
    [ Hits: 100 | Votes: 0 | Rating: 0 ]

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