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Antennas : 15M

• Build a Lightweight 15m Yagi Antenna: Simple Design for Impressive Performance - In this article, Steve G0UIH presents a straightforward guide for constructing a lightweight 15m 3 Element Yagi antenna with impressive performance metrics. With a focus on ease of construction and efficiency, the design boasts a nearly 8.2dbi forward gain and 30db front to back ratio. Utilizing readily available materials and a hairpin match for impedance matching, this Yagi offers broad bandwidth and simple tuning for optimal operation across the 15m band.
  [ Hits: 70 | Votes: 0 | Rating: 0 ]

• Single support gain antennas for 80-160 meters - On 80 and 160 meters an antenna with modest gain and good front-to-back (F/B) ratio, along with a steerable pattern, can be very effective for contesting.
  [ Hits: 3403 | Votes: 0 | Rating: 0 ]

• ZR6KMD 2M Beam Antenna - This design was adapted from an article in the ARRL Handbook and built with simplicity and duplicity in mind. This antenna is a vast improvement over a standard dipole with a forward gain of around 8db with a front to back ratio of 10db.
  [ Hits: 2222 | Votes: 1 | Rating: 2 ]
• Portable 4-Element Quad for 2 meters - A portable 4 elements quad antenna for 144 MHz, 9 to 10 DBd forward gain, 30 DB front-to-back ratio, and 33 DB front-to-side ratio
  [ Hits: 2152 | Votes: 2 | Rating: 8 ]
• 144MHz Pocket Portable Yagi - Design for a 5 element 2 Metre beam with a forward gain of 8dBD and a front to back ratio of over 24dB.
  [ Hits: 1561 | Votes: 7 | Rating: 8 ]

• 40 meters band beverage antenna - The author describes his experience building and using a Beverage antenna for the 40-meter band. Despite encountering some challenges, the antenna offered some improvements in receiving stations compared to a 3-element inverted Vee antenna. The Beverage antenna showed a significant daytime signal-to-noise ratio improvement and received signals better than the Vee antenna. However, the front-to-back ratio was not ideal, and the transmit power seemed to affect the Beverage antenna. Overall, the author concludes that the Beverage antenna might be more suitable for locations with higher noise levels. The total cost of the antenna was around 30 Euros.
  [ Hits: 34 | Votes: 0 | Rating: 0 ]

• 4 el yagi for 50 Mhz - The EF0604S is a compact 4 elements yagi antenna plan for six meters band featuring 8.77 dBi gain and a front back gain of 17.89 dB. Article includes elements dimensions and spacing, along to pictures of some homebrewed examples.
  [ Hits: 3751 | Votes: 10 | Rating: 6.84 ]
• A Loft-Yagi for Six Metres - This design makes the most of having to put an aerial in the attic. This inverted-vee yagi is giving good results at GW0GHF. Directive gain is about 6 dBd. The front-to-back ratio is not brilliant, about 20 dBd.
  [ Hits: 138 | Votes: 1 | Rating: 5 ]

• K9AY terminated loops for 75m - It is very compact, low noise and directive with an impressive 20 to 25 dB front to back
  [ Hits: 363 | Votes: 0 | Rating: 0 ]

• WW2Y/K2WI Beverage design - Ideas for enhanced beverage antenna performance, Single wire beverage improvements and arrays of two beverages. This article explores improving reception with Beverage antennas. It discusses single wire Beverages and their limitations. Then it compares two array configurations: broadside and end-fire. Broadside offers better front-to-side ratio but requires more space. End-fire offers better front-to-back ratio and takes less space but is trickier to implement for multiple bands. The article concludes with a 3-element end-fire design for excellent performance and explores possibilities for dual-band configurations.
  [ Hits: 4056 | Votes: 4 | Rating: 9.5 ]

• Cebik Moxon Rectangles - The Moxon Rectangle is growing in popularity as a compact 2-element array that approaches a full-size 2-element in gain but with a far superior front-to-back ratio and a direct match for the standard 50-Ohm coaxial cable.
  [ Hits: 3331 | Votes: 5 | Rating: 5 ]
• 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 ]

• 80Mt rotating Quad - 2el 40Ft front to back spacing 80 meters Quad antenna
  [ Hits: 9935 | Votes: 3 | Rating: 6 ]
• Cubic Quad  ^pop - The cubic quad is a very popular way to get reasonably high gain and excellent front to back ratios as well as low angles of radiation for without going to extreme heights. Includes design for 2 6 10 12 15 meter bands
  [ Hits: 68065 | Votes: 64 | Rating: 5.08 ]

• Elk Antennas - Elk Antennas to give the Ham log periodic antennas with the best gain, directivity, and front to back ratio possible for the size and price.
  [ Hits: 446 | Votes: 1 | Rating: 8 ]

• Star Cards - Ham Radio QSL Cards - Custom QSL Cards are printed with the same quality as other STAR CARDS products. They are printed on a 14 pt. card stock using process color and a protective ultra-gloss UV coating on the front, and one ink color on the back.
  [ Hits: 1322 | Votes: 2 | Rating: 3 ]

• PolarPlot - Freeware antenna software that lets you see what the polar diagram of your rotatable beam actually looks like where it is operating. With PolarPlot you can measure the polar diagram of the antenna and check for abnormalities - compare plots taken before and after changes to the design or location - check the -3dB beamwidth - look at the front to back ratio - see the size and position of the sidelobes.
  [ Hits: 5986 | Votes: 10 | Rating: 5.59 ]
• AN-SOF - Professional Antenna Simulation - 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: 242 | Votes: 2 | Rating: 10 ]

• Experimental HF 6-band SSB transceiver - An SSB radio for the HF bands will be presented. Featuring 12 to 20 Watts of output power (depending on DC supply), full DDS frequency generation, covering 6 major frequency bands (1.8, 3.5, 7, 14, 21 and 28 MHz) within the short wave amateur radio spectrum. The rig also features colored LCD and front panel backlight.
  [ Hits: 709 | Votes: 14 | Rating: 9.86 ]

• RFI - Intermodulation - Getting squeaks and squawks from your H-T? Are pagers crunching your mobile rig's front end? Here's how intermod happens--and how to fight back!
  [ Hits: 674 | Votes: 2 | Rating: 5.5 ]