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eh antenna

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Antennas : 10M
  • 2 Element Wire Yagi for 10 meters band - A page with an embedded video about a two elements yagi antenna for 28 MHz based on the original antenna design by VE7CA
    [ Hits: 276 | Votes: 1 | Rating: 8 ]
Antennas : 30M
  • A 30 Meter Sloping Dipole Antenna - This variation of the basic horizontal, half wavelength flat top dipole has proven to be a simple, effective antenna suitable for both home and portable use.
    [ Hits: 452 | Votes: 0 | Rating: 0 ]
Antennas : 6M
  • Slot-Cube Antenna for 6 Meters - Slot cubes are folded skeleton slot antennas with widened, folded dipoles bent into a cube to reduce size. QST Article 12 2019
    [ Hits: 570 | Votes: 2 | Rating: 5.5 ]
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 : Dipole
  • Short Monoband Dipole Antennas - KGD Antennas - The KGD antenna is an option for those with space restrictions. The idea behing this project is to provide a short dipole antenna for HF Bands and to allow operations on HF bands when its not possible to setup large antennas, using these short base loaded dipoles.
    [ Hits: 240 | Votes: 0 | Rating: 0 ]
Antennas : Homebrewing Techniques
  • Choosing the Right Aluminum Stock for Antenna Building - Building an efficient antenna begins with selecting the right aluminum stock. This article provides a comprehensive guide to sourcing aluminum materials for antenna construction. It covers different aluminum grades, their tensile strengths, tempering options, and their suitability for various antenna components. The article also recommends reputable suppliers in the UK, making it a valuable resource for antenna builders seeking durable and high-performance materials.
    [ Hits: 76 | Votes: 0 | Rating: 0 ]
Antennas : J-Pole
  • 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: 189 | Votes: 0 | Rating: 0 ]
Antennas : Magnetic Loop
  • Loop magnetic antenna for 80-160 meters band - Jeri Ellsworthhas started a video series devoted to building a magnetic loop antenna for the 160- and 80-meter bands. The first video, included after the break, is an overview of the rationale behind a magnetic loop
    [ Hits: 174 | Votes: 0 | Rating: 0 ]
  • A More Efficient Magnetic Loop Antenna - The idea behind this antenna was to use multiple conductors in parallel to reduce the resistance losses in the antenna , and thereby improve the efficiency.For a given magnetic loop antenna, doubling the number of conductors from one to two will typically increase efficiency by about a factor of two. There is a limit, and beyond three or four conductors further increases are small, and may not be worth the bother.
    [ Hits: 212 | Votes: 2 | Rating: 5.5 ]
Antennas : OCF
  • Tuning OCF L-Dipoles - The behavior of a straight dipole and its L-form is examined in terms of impedance and SWR. By adjusting the feed point or bending angle, impedance variation is observed. Impedance shifts symmetrically as the feed point deviates, leading to recommendations for optimal ratios. Model simulations aid in understanding and fine-tuning, crucial for achieving a 50 Ohm match. Practical tuning guidelines ensure efficient antenna performance.
    [ Hits: 28 | Votes: 0 | Rating: 0 ]
Antennas : Traps
  • Optimizing Coax-Cable Traps - A document that will guide you on Coaxial-Cable trap optimization process to gain on global antenna performance and on increasing effective bandwidth.
    [ Hits: 163 | Votes: 0 | Rating: 0 ]
Antennas : Vertical
  • 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: 353 | Votes: 7 | Rating: 2.71 ]
Internet and Radio : WebSDR
  • WebSDR Wismar - This WebSDR is located in Wismar in the north of Germany JO53RV and operated by Frank Goehling DO7AX. There are four RTL2823U USB dongles with three Ham It UP up-converters for 80m/40m/20m and a RTL2832U for the 2m Band. The Antenna for 80/40/20m is a 84 meters Delta Loop.
    [ Hits: 379 | Votes: 4 | Rating: 10 ]
Operating Modes : Mobile
  • How I Installed a Ham Radio Antenna on my Truck - I wanted to mount an amateur radio antenna on my truck that was more permanent than the magnetic mount on I already had, but I had a few specific design requirements for the project.
    [ Hits: 220 | Votes: 0 | Rating: 0 ]
Operating Modes : Portable Operations
  • Ham Radio And the Art of Bushcraft - This article explores the marriage of amateur radio and bushcraft, advocating the pleasure of setting up a portable station in nature rather than operating from the confines of a vehicle. The Parks on the Air (POTA) programme is highlighted as a catalyst for outdoor radio activities. The author shares his experiences and techniques, from transporting equipment into the wilderness to setting up shelters and antennas. Knot tying skills and the use of frogs are emphasized for efficiency, and a unique method for launching wire antennas is described. The article emphasizes the synergy between amateur radio and bushcraft skills, enhancing the enjoyment of radio operations in wilderness environments.
    [ Hits: 81 | Votes: 1 | Rating: 10 ]
  • Versatile Field Radio Kit - Alan (W2AEW) shares his comprehensive portable field radio kit, showcasing various antenna options and accessories for POTA activations. The kit, housed in a repurposed camera bag, features the Elecraft KX2 Shack a Box, AX1 antenna kit, and additional accessories. With thoughtful organization and adaptability, the kit offers flexibility for different deployment scenarios, ensuring efficient operation in diverse field conditions
    [ Hits: 44 | 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 ]

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