antenna blog
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Antennas : 40M : 40 meter Delta Loop Antennas- Building a 40m Delta Loop Antenna
- An experimento of a 40 meter delta loop antenna both in horizontal and vertical polarization and several elevation angles with interesting notes about the effect of the radial field under the antenna.
[ Hits: 290 | Votes: 4 | Rating: 8.25 ]
- Shortened 40 meter Vertical for POTA SOTA
- Build A Shortened 40 Meter Vertical antenna For POTA / SOTA Activations. A project for a portable wire antenna for 40 meters band suitable for POTA or SOTA operations.
[ Hits: 124 | Votes: 1 | Rating: 10 ]
- 70Mhz (4 metre) Delta Loop Antenna
- Discover the success story of creating a 4-meter Delta Loop antenna, ideal for improving radio communication. This horizontally polarized antenna offers efficient performance when mounted at VHF heights, catering to both HF and VHF characteristics. A simple, DIY project suitable for portable setups, providing versatile options for radio enthusiasts.
[ Hits: 53 | Votes: 1 | Rating: 4 ]
- Enhancing Performance with a Cage Dipole for Six Meter Band
- Explore the design and testing of a cage dipole antenna for 6 meters. Through innovative construction, witness a remarkable 77% increase in bandwidth and improved impedance characteristics.
[ Hits: 75 | Votes: 0 | Rating: 0 ]
- Double BiQuad Antenna Calculator
- Online antenna calculator for homemade double biquad antenna for UMTS 3G 4G WiMAX WiFi frequencies. Article includes also a simple biquad antenna for 4g
[ Hits: 152 | Votes: 2 | Rating: 5.5 ]
- Portable Base Matching Unit for 42 to 48 Foot Verticals
- Medium power BMU (Base Matching Unit) intended for 42 foot to 48 foot vertical, sloper, or Inverted-L antennas.
[ Hits: 83 | Votes: 1 | Rating: 1 ]
- Microvert Antenna for 40m by ON7IR
- A mircovert antenna assembled for the 40m version of the DL7PE antenna.
A one meter long aluminum tube with 24mm diameter is used for the base (element 1) and a 50cm aluminum tube with 20mm diameter for element 2 (the extention). A pvc pipe, 34cm long and with a diameter of 38mm, is used to wind the coil on (1mm enamelled copper wire).
[ Hits: 149 | Votes: 0 | Rating: 0 ]
- A Cobwebb antenna homebrew
- A homebrew cobwebb antenna for HF bands covering from 10 to 20 meters band.
[ Hits: 175 | Votes: 1 | Rating: 10 ]
- HF EFHW Antenna Antenna Tuner
- Schemaric diagram for a 80m, 40m, 30m, 20m EFHW Antenna Antenna Tuner. The tuner has been designed for an antenna length of 41m and the counterpoise 7.5m.
[ Hits: 117 | Votes: 0 | Rating: 0 ]
- 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 ]
- Drive-On Antenna Mast For POTA
- This antenna mast mount uses two Reese hitch extensions that are welded on to a piece of 2 inch square tube. It comes apart in two pieces. The vertical pipe on the left is welded on to a 2 inch piece of square tube that fits into the Reese hitch extension.
[ Hits: 151 | Votes: 1 | Rating: 9 ]
- 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: 84 | Votes: 0 | Rating: 0 ]
- How to install a Mini Whip antenna
- Notes on how to properly install a Mini Whip receiving antenna in an noisy urban environment.
[ Hits: 359 | Votes: 3 | Rating: 6.67 ]
- Cushcraft R7000 Prob/Repair
- Repairing a Cushcraft R7000 antenna featuring several problems, mostly concerning coils and the insulating parts of the antenna.
[ Hits: 209 | Votes: 1 | Rating: 10 ]
- Satellite Yagi crossed 2m, 70cm
- Construction of an antenna for experimental satellite communication, 8el. (435 Mhz) x 4el. (145 Mhz) Satellite Yagi crossed. No difficulty to built this antenna. Except the gamma match. that requires a little more attention
[ Hits: 145 | Votes: 0 | Rating: 0 ]
- Dual-Band X-Frame Shortwave RX Loop Antenna
- A dual band X-frame wire antenna made using 4 turns for response down to 3 MHz or so, and 2 turns (switched) for response up to around 18 MHz. The loop configurations are tuned using common eBay 365 pF tuning caps.
[ Hits: 148 | Votes: 1 | Rating: 10 ]
- Vertical Antenna Wavelength Vs Performance
- This article on basic antenna theory explains why is a 5/8 wavelength vertical antenna better than a 1/4 wavelength antenna
[ Hits: 140 | Votes: 0 | Rating: 0 ]
- ZS1II VE2EK Amateur Radio Blog
- Amateur radio blog about Homebrew equipment,ham radio antennas, satellites, QO-100 operations, rf amplifiers, 2m ldmos amplifier, 70cm ldmos amplifier, 23cm ldmos amplifier
[ Hits: 115 | Votes: 3 | Rating: 8.67 ]
- Greencube (IO-117) Guide to Setup, Software and Operation
- Explore the detailed setup, essential software, and operational nuances for Greencube (IO-117), a Medium Earth Orbit (MEO) satellite with a 70cm digipeater, offering DX possibilities for amateur radio enthusiasts. From antenna configurations to software choices, this guide covers everything for a successful Greencube experience.
[ Hits: 136 | Votes: 0 | Rating: 0 ]
- A Simple Field Strength Meter
- Mad your own simple FS meter. It is the simplest thing to make and is good enough to see if the antenna under test is radiating more power than your old ground plane, old mobile vertical or just radiating at all in a particular direction or in all directions.
[ Hits: 158 | Votes: 0 | Rating: 0 ]
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