all direction

all direction

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• A 144 MHz turnstile antenna - Omnidirectional and horizontally polarized VHF antenna
  [ Hits: 1298 | Votes: 4 | Rating: 5 ]
• 2m Big Wheel Antenna - A Useful Horizontally Polarised Omni-directional Antenna with Gain for 144 MHz
  [ Hits: 1323 | Votes: 4 | Rating: 7.75 ]

• Six Meter Quad Turnstile Antenna - Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern
  [ Hits: 702 | Votes: 2 | Rating: 9.5 ]
• Omni-directional Antenna for 50 MHz - This simple project, based on the orginal CobWebb-Antenna model, is about an horizontally polarized, omi-directional antenna for the six meter band.
  [ Hits: 544 | Votes: 2 | Rating: 7 ]

• 50MHz / 6m J-pole Antenna by VK4ADC - The J-Pole is an easy-to-build and inexpensive device that provides an omni-directional vertically polarized antenna without the need for a ground plane. In technical terms, it is an end fed vertical 1/2 wave which is fed via a 1/4 wave matching stub.
  [ Hits: 442 | Votes: 4 | Rating: 6 ]

• Coaxial Collinear Antenna for 70 CM Band - This coaxial collinear antenna was built to test for my own consumption whether or not this antenna method actually works. the guiding principle is that we have multiple 1/4 wave elements fed in series , the radiation from each adds in phase to produce a large vertically polarised omni-directional antenna with substantial gain
  [ Hits: 575 | Votes: 3 | Rating: 6.33 ]

• The Sloping Vertical Dipole - The radiating part is the vertical half of the dipole. You get nearly radiation in all directions, the second half must not be in 180°. The table below show how we get an impedance for direct feeding of 50Ohm coax. by DK7ZB
  [ Hits: 537 | Votes: 0 | Rating: 0 ]

• DL7AHW Spraycan EH Antennas - Hairspray-can EH Antennas for shortwave and online programs. Small magnetic (H) antennas (Loops) have a good efficiency for the upper bands (20/15/10 meter band) and also in contrast to E-antenna a defined radiation direction.
  [ Hits: 316 | Votes: 2 | Rating: 8.5 ]

• 2m Halo Antenna - Construction and analysis of a low cost omnidirectional horizontally polarized antenna for 144 MHz, including notes on halo antenna stacking
  [ Hits: 1013 | Votes: 9 | Rating: 5.34 ]

• Exploring The J-Pole Antenna - The J-Pole antenna is a common omnidirectional antenna used in amateur radio, particularly on the VHF and UHF bands. This article is an attempt to explore how the J-pole antenna transforms feed-line impedance to free-space impedance, all the while providing gain found only in the more expensive commercial products.
  [ Hits: 143 | Votes: 0 | Rating: 0 ]

• 2m Band Moxon - Moxon is a rectangle shaped directional antenna, originally designed by Les Moxon G6XN. There are couple of advantages of using this antenna. It is small in size, Easy to mast, Balanced to 50 Ohms, Near 1:1 SWR, Excellent Front to Back (F/B) ratio, Large bandwidth
  [ Hits: 583 | Votes: 1 | Rating: 6 ]

• Double Half-Delta Loop RX Antenna - This wire antenna was developed to offer for a small, low-band, ground independent directional receiving antenna, it requires only two support poles. It is basically composed by two interconnected half delta loops and is better than a single flag or EWE, and almost as good as two phased EWE in the same space.
  [ Hits: 939 | Votes: 0 | Rating: 0 ]
• 160 Meters 4 Square Receive Antenna - A four square array receiving antena for the top band, performance is extremely directional and space requirements are really hard to fulfill.
  [ Hits: 181 | Votes: 1 | Rating: 10 ]

• Eggbeater II Omni LEO Antennas - Presented here is a high-performance, circularly polarized omni-directional antenna that is easy to build, easy to tune, inexpensive, and will work all the mode J Low Earth Orbit (LEO) satellites
  [ Hits: 2904 | Votes: 2 | Rating: 8.5 ]

• Large Antenna in a fixed direction? - If your antenna is fixed in one direction, you will notice that your antenna works perfectly only during fall and spring.
  [ Hits: 333 | Votes: 0 | Rating: 0 ]

• The Turnstile antenna - An omnidirectional and horizontally polarized VHF antenna by EA4EOZ
  [ Hits: 916 | Votes: 4 | Rating: 3.25 ]

• Trapped vertical Antenna - This antenna is an omnidirectional and multiband and it is well suited for DX enthusiasts with limited space. Each of the parallel circuits (trap) behaves like an isolator on its resonant frequency.
  [ Hits: 356 | Votes: 7 | Rating: 2.71 ]

• The NDB List website - The NDB List is a private group for DXers who are interested in Non Directional Radiobeacons, MF, HF & VHF Propagation Beacons, Cluster Beacons and all kinds of other radiobeacons
  [ Hits: 789 | Votes: 6 | Rating: 5.67 ]

• Mini Satellite-Antenna Rotator Mk1 - This project is a portable device used to automatically point a directional antenna towards an orbiting satellite. It takes all the effort out of little kids holding the antenna and figuring out where to point it. It allows students to talk through Amateur Radio satellites or download weather satellite images.
  [ Hits: 552 | Votes: 0 | Rating: 0 ]

• KD1JV Digital SWR / Power Meter - This small, light weight digital SWR and power meter uses an Atmel AVR Butterfly demo board and a Stockton type directional coupler.
  [ Hits: 1408 | Votes: 3 | Rating: 4 ]

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