wi fi antennas

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wi fi antennas

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Antennas : 20M : 20 meter Yagi antennas
  • 2 element Yagi for 20 meter - This antenna was designed for the CQ WW CW 2009 at EA8URL. All elements are made out of fishing rods with an insulated copper cable fixed on the rods by cable ties. Both fishing rods and cable are UV resistant.
    [ Hits: 630 | Votes: 2 | Rating: 5 ]
Antennas : 40M : 40 meter Vertical Antennas
  • 40m Vertical End-Fed Antenna - A quarter wave vertical end-fed antenna for the 40 meters band. As all vertical antennas, also this aerial requires a good earthing system. In this project the ground is composed by twelve 4, wires buried in the lawn by using a spade to create a slit to drop the wire into.
    [ Hits: 2688 | Votes: 7 | Rating: 5.43 ]
Antennas : Antenna Books
  • Advanced Antenna Modeling Book by ON5AU - A new book about modeling antennas with EZNEC and in particular in conjunction with the AutoEZ application for a total of 584 pages. The book include more than 3000 accompanied downloadable EZNEC model files
    [ Hits: 447 | Votes: 9 | Rating: 6.23 ]
Antennas : Baluns
  • When and Where to Use Baluns - Baluns are usually used by Hams to feed dipole antennas with 50 ohm coax and to transpose from ladder line feeding a multi-band antenna to the unbalanced input of an antenna tuner.
    [ Hits: 1518 | Votes: 9 | Rating: 7 ]
Antennas : Beverage
  • A Reversible Beverage at ZL3IX - How do two-wire reversible direction Beverages work, an excellent document that explains fundamentals of beverage antennas.
    [ Hits: 515 | Votes: 0 | Rating: 0 ]
Antennas : Dipole
  • The half-wave dipole, your first antenna - Construction tips of a basic wire antenna, the half wave dipole. Inverted V dipoles and effects of inverted v on radiation pattern.
    [ Hits: 234 | Votes: 1 | Rating: 9 ]
Antennas : End-Fed
  • Multi-band End-Fed Antenna - An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
    [ Hits: 1100 | Votes: 6 | Rating: 4.5 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • The End-Fed Half-Wave Antenna - Presentation - A very well done presentation about End-Fed Half-Wave antennas. This PDF document contains a summary of experiences in how to build custom EFHW antennas. Includes an interesting comparison table of UnUn configurations with recommended toroids, Wire size, turns and capacitors. An useful recap on common errors in building homebrew EFHW Ununs completes the document.
    [ Hits: 406 | Votes: 3 | Rating: 8.67 ]
Antennas : Portable
  • Portable wire antennas - This document describe serveral wire antennas, from the folded dipole, to the common halfwave monoband antenna for those who want to make HF portable operations in holiday.
    [ Hits: 839 | Votes: 2 | Rating: 1 ]
Antennas : Theory
  • Practical Antenna Modeling with 4NEC2 - Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
    [ Hits: 473 | Votes: 0 | Rating: 0 ]
Antennas : Towers
  • Antenna Mast Guying for Amateur Radio Antennas - Article based on ROHN engineering specification that will guide on proper guying heights and guy lengths when guying ham radio antenna masts. It will help you determine ahead of time the proper length of guy wires and the distance from the base of the mast to the anchor points
    [ Hits: 314 | Votes: 3 | Rating: 7.67 ]
Antennas : VHF UHF
  • VHF-UHF Long Boom Very High Performance Antenna Designs - Experimental Long Boom Antennas - CP, LPDA, multiband with several NEC Files for 50MHz 144MHz 222 MHz 432MHz but also 902MHz and 1296 MHz Antenna projects. Includes also for each antenna model, in a general comparison table each antenna characteristics including Directive Gain, G/T, E-F/R, H-F/R abd Boom Length. This is a great value comparison table of several commercial and home made VHF UHF antenna projects.
    [ Hits: 188 | Votes: 1 | Rating: 10 ]
Antennas : Wire
  • The K2AV FCP Single Wire Folded CounterPoise - Efficient Low Band Counterpoise for Restricted Circumstances Loss Avoidance Opportunities and Techniques for the Low Bands The short and linear FCP was designed to reduce ground losses from inadequate radial systems beneath inverted L and other vertical antennas.
    [ Hits: 283 | Votes: 0 | Rating: 0 ]
  • HF Wire Antennas for Field Day - Dipole antennas, vertical half-wave dipole antennas with impedence tranformes that can be used for portable operations. Some well worn antenna configurations are the easiest and loudest lash-ups you can try.
    [ Hits: 219 | Votes: 0 | Rating: 0 ]
Antennas : Yagi
  • Simple Gain Antennas for the Beginner - You do not need to invest an absurd amount of money to build a beam type of antenna. Good performance can be obtained with simple antennas made from some very ordinary materials. QST article
    [ Hits: 1059 | Votes: 4 | Rating: 6.5 ]
Manufacturers : Antennas : HF : Active antennas
  • Active Antenna Amplifier - Manufacturer of amplifier for small magnetic and electric receiving wideband antennas, and variable delay line kit for active antenna phased arrays
    [ Hits: 279 | Votes: 0 | Rating: 0 ]
Operating Modes : Portable Operations
  • Portable Amateur Radio Operations - The main issues with portable HF operations have become not issues of the transmitting and receiving equipment itself but of providing power and antennas
    [ Hits: 496 | Votes: 2 | Rating: 5.5 ]
Radio Equipment : HF Portable Antenna : TransWorld Antennas TW2010
  • TW4040 Manual - PDF manual of the TW4040 The Adventurer MonobanderTM TransWorld Antennas
    [ Hits: 628 | Votes: 0 | Rating: 0 ]
Technical Reference : Antenna Switch
  • Five Antennas Switch Box - A project of a 5 Antennas Relay Switch Box, all Switches & Relays have both contacts wired in parallel to improve reliability of operation, to prevent static build up, when an antenna is not in use the feeder coax is grounded.
    [ Hits: 1244 | Votes: 1 | Rating: 10 ]
Technical Reference : Vector Network Analyzer
  • miniVNA PRO Modifications - The mini Radio Solutions miniVNA PRO is the only affordable vector network analyser (VNA) I know of that offers remote wireless operation. This is very interesting because it allows to measure the input impedance of HF antennas installed at height without having to deal with coax cable lengths, baluns nor common mode suppression chokes. However, to render the miniVNA PRO truly field proof, it requires a number of significant modifications.
    [ Hits: 136 | Votes: 5 | Rating: 7.8 ]

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