multi mode antenna

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multi mode antenna

20 links

Antennas : 20M

  • W5GI Mystery Antenna  pop - W5GI Mystery Antenna is a multi-band wire antenna that performs exceptionally well even though it confounds antenna modeling software. This antenna covers 80 to 6 meters with low feed point impedance and will work with most radios, with or without an antenna tuner. It is approximately 100 feet long, can handle the legal limit, and is easy and inexpensive to build. It is similar to a G5RV but a much better performer especially on 20 meters.
    [ Hits: 139316 | Votes: 123 | Rating: 7.55 ]
Antennas : Baluns
  • How to Blow Up Your Balun - In this article, author examine stresses placed on common-mode chokes (aka baluns) as hams use/abuse them, examine the efficiency of simple dipole multi- band antennas and their feed systems. Stressing a Balun.
    [ Hits: 383 | Votes: 0 | Rating: 0 ]
Antennas : CobWeb
  • CobWeb multiband folded dipole - The cobweb antenna it is basically a 5 band antenna comprising of 5 full half wave dipoles for each band - between 10 meters and 20 meters, the antenna is also resonant on 6M and can be modeled even for VHF frequencies.
    [ Hits: 8620 | Votes: 0 | Rating: 0 ]
  • Building a CobWebb Antenna - Homebrew a cobwebb antenna for the HF bands. This page describe a cobwebb multiband antenna resonating on 14 18 21 24 and 28 MHz. The cobweb antenna model can be considered a fan dipole, or better, multiple dipoles fed in parallel.
    [ Hits: 1488 | Votes: 5 | Rating: 7.6 ]
Antennas : Dipole
  • DG0KW Multiband dipole - German article on the multiband dipole by DG0KW. This antenna can be configured for several bands and can work in 3 or 4 bands mode. Can be used in restricted space lots.
    [ Hits: 2882 | Votes: 7 | Rating: 4.71 ]
Antennas : Fan Dipole
  • Modeling an 80/40/20M Fan Dipole for DX - An interesting presentation of a real multiband Fan Dipole antenna, optimized for better DX operation performances, considering the terrain, position, DX destination path and other influencing factors
    [ Hits: 532 | Votes: 2 | Rating: 5.5 ]
Antennas : G5RV
  • G5RV multi-band antenna - Multi-band centre-fed antenna capable of very efficient operation on all HF bands, specifically designed with dimensions which allow it to be installed in gardens and other open spaces which accommodate a reasonably-straight run of 31.1m (102 ft) for the flat-top standard model.
    [ Hits: 7302 | Votes: 8 | Rating: 7.38 ]
  • Multiband HF antennas - Presentation by AC8GY on classic G5RV Antennas and other horizontal dipoles, the popular G5RV, ZS6BKW, dipole fan, Alpha-Delta DX-CC and a trap dipole are modeled in EZNEC and compared.
    [ Hits: 1074 | Votes: 0 | Rating: 0 ]
Antennas : HexBeam
  • Understanding the Hexbeam - G3TXQ pages focuses on understanding the HexBeam antennas. Basics, dimensions, multi band issues, antenna modeling.
    [ Hits: 2176 | Votes: 1 | Rating: 7 ]
Antennas : Moxon
  • Moxon Mania - Building the Ultimate 4-Band Moxon Antenna - The article details the design and construction of a four-band Moxon beam by a radio amateur. The beam, mounted atop a rooftop tower, aimed for gain over a dipole on 20 meters, cost under $500, and included additional bands. The design features fiberglass spreaders, four bands (20/15/10/6 meters), and a single feedpoint. The construction involved computer modeling, NEC source code, and specific dimensions. The article outlines the assembly, materials, and tuning process, including in-situ adjustments for optimal performance. Despite initial challenges, the beam improved signal strength and facilitated contacts on multiple bands, marking it as the best HF antenna the author has owned.
    [ Hits: 94 | Votes: 0 | Rating: 0 ]
Antennas : Receiving
  • Chokes and Isolation Transformers for Receiving Antennas  new - Chokes and isolation transformers are essential for receiving antennas to mitigate common mode current, which induces noise and interferes with signal quality. Common mode chokes, formed by winding feedline through ferrite cores, block unwanted current effectively. Proper selection of core material and winding turns ensures resonance near the operating frequency, reducing interference. Isolation transformers further minimize interference, crucial for multi-transmitter stations.
    [ Hits: 52 | Votes: 1 | Rating: 9 ]
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 : Windom
  • Windom Antenna with 4:1 balun - The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .
    [ Hits: 8025 | Votes: 9 | Rating: 6.89 ]
Antennas : Wire
  • Aerials for the Terrified - Summary of common dipole and wire antenna models, from the basic dipole to sloopers, inverted v and multiband wire aerials
    [ Hits: 1287 | Votes: 0 | Rating: 0 ]
Antennas : ZS6BKW
  • Revisiting the GR5V and ZS6BKW Multi-band Antennas - NEC models are used to explore the GR5V and ZS8BKW optimizations. A third optimization is also rediscovered. The effect of fixed lengths of 75 ohm coax are explored. A link to the NEC model is provided.
    [ Hits: 310 | Votes: 1 | Rating: 10 ]
Manufacturers : Antenna Analyzers
  • Timewave - Sells leading-edge voice and digital communications products to the world-wide military, government, industrial, and amateur radio marketplaces. Bluetooth Remote Audio/PTT, Rig Controller with Audio & PTT , HamLinkUSB Rig Control, Noise filtersm antenna analyzers, Multimode Data Controller, TNC, Packet Radio Terminal Node Controller. USB2RS232
    [ Hits: 4100 | Votes: 3 | Rating: 5.33 ]
Manufacturers : Antennas
  • MyAntennas.com - MyAntennas.com offers standard and custom made multiband antennas, Baluns, Common Mode chokes and accessories. All products are designed and made by Danny Horvat, E73M an antenna design engineer formerly employed by Cushcraft Corporation.
    [ Hits: 780 | Votes: 1 | Rating: 1 ]
Operating Modes : Satellites : Weather Satellite
  • Multimode.fr - Amateur Radio Blog - Ham radio blog dedicated to WX Sat reception in particular NOAA satellites, antenna homebrewing and beacon reception by F4CWH
    [ Hits: 251 | Votes: 0 | Rating: 0 ]
Software : Antenna analysis
  • AutoEZ - Automated use of EZNEC. AutoEZ is an Excel application that works in conjunction with the EZNEC antenna modeling programs and allows you to use variables to control diverse aspects of the model. You can then run multiple EZNEC test cases while AutoEZ automatically changes one or more variables between runs. Commercial version and free demo available for download.
    [ Hits: 515 | Votes: 1 | Rating: 7 ]
Software : Grid Bearing and Maps
  • AIO All in One by WD8KNC - Windows contest logging software with multiple functions like antenna rotor control, dx cluster, cat control, voice and cw keying, supports many data modes, qrz lookup, pirint qsl and labels, mapping and more. Donationware software.
    [ Hits: 12960 | Votes: 14 | Rating: 5.78 ]

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