rf antennas

rf antennas

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• Improving Surface Wave Antennas - Making the Short dual wire Beverage better by Jeff Smith VE1ZAC
  [ Hits: 402 | Votes: 1 | Rating: 4 ]

• Refining an End Fed Antenna - Optimizing performances of the end-fed antennas QRP quarterly article
  [ Hits: 1282 | Votes: 1 | Rating: 5 ]

• End Fed Half Wave Antenna Coupler - Centre fed half wave dipoles make great, simple and effective antennas for the HF bands. Sometimes however, the centre feed is not ideal. This great project will improve the overall antenna performance.
  [ Hits: 1426 | Votes: 1 | Rating: 10 ]

• Magnetic Loop Antennas - A complete guide to magnetic loop antenna construction, with analysis of multi-turn and single-turn magneti loops, and and insight on choosing the optimal capacitor, or homebrewing your own butterfly capacitor
  [ Hits: 1251 | Votes: 1 | Rating: 10 ]

• 5 Band Telescopic Vertical Antenna - 5 Band 1/4 wave Telescopic Antenna. The 20m to 10m, antenna is simple and cheap to make, and has a performance that matches commercial antennas but at cost considerably lower. The design was purposely based on a telescoping fibre glass fishing rod as this allows it to be easily stowed away in the car.
  [ Hits: 3608 | Votes: 3 | Rating: 9.33 ]

• Revisiting the Resonant Feedline Dipole - An article on RFD antennas, resonant feed-line antennas
  [ Hits: 679 | Votes: 2 | Rating: 10 ]

• Slim Jim vs J-Pole - A comparative article on performance differences between Slim Jim antennas versus J-Pole antennas
  [ Hits: 856 | Votes: 2 | Rating: 10 ]

• Balloon Vertical Omni-Antennas - Experimenting vertical wire antennas for 40 and 20 meters supported by balloons resulting in excellent gain in RX and good overall performance against horizontal dipole
  [ Hits: 771 | Votes: 1 | Rating: 5 ]
• Radials on Vertical Antennas - Experimental Determination of Ground System Performance for HF Verticals
  [ Hits: 1405 | Votes: 9 | Rating: 6.67 ]

• Simple Gain Antennas for the Beginner - You do not need to invest an absurd amount of money to build a beam type of antenna. Good performance can be obtained with simple antennas made from some very ordinary materials. QST article
  [ Hits: 1061 | Votes: 4 | Rating: 6.5 ]

• LB3HC's hightech blog - LB3HC's hightech blog - Amateur radio, RF design, electronics, uC, software, Arduino, AVR, Antennas
  [ Hits: 186 | Votes: 0 | Rating: 0 ]

• Perfect Quad Antennas - Perfect Quad Co,Ltd japanese ham radio quad antenna manufacturer
  [ Hits: 934 | Votes: 2 | Rating: 1.5 ]

• Southwest Antennas - High-performance rugged antennas and RF accessories such as magnetic mounts, RF coaxial gooseneck adapters, LNAs, BDCs, for law enforcment, military, maritime and video markets.
  [ Hits: 244 | Votes: 0 | Rating: 0 ]

• What is Radio Propagation - RF propagation - Discover the key facts about what radio propagation is, the different types available and how they affect different frequencies.
  [ Hits: 198 | Votes: 1 | Rating: 10 ]

• Mod for Acom 1000 amplifier - The problem originates by improper TXOUT-to-RF timing (RF transmission exists still after a TX-EN prohibition), combined by too long decay of their CW pulses.
  [ Hits: 511 | Votes: 0 | Rating: 0 ]

• FT-100D Active Antenna Interface - Yaesu FT-100D Active Interface for the Codan 9350 and Comet SB-15 Antennas
  [ Hits: 488 | Votes: 1 | Rating: 5 ]

• Transverters-Store - Transverters-Store is a online shop for low cost transverter boards, but also QRP transceivers, Active antennas, RF bridge and probes, Mic equalizers and other amateur radio accessories
  [ Hits: 694 | Votes: 3 | Rating: 5.67 ]

• Noise Canceller Project - This project was intended to accompany the stealth antenna project. Author want to see how effective a noise canceller could be in reducing the background noise floor when attic / stealth antennas are being used.
  [ Hits: 709 | Votes: 0 | Rating: 0 ]

• RF Safety in Tower Climbing - The risks for exposure to significant levels of RF radiation is high for tower climebers, the RF field levels near FM radio and television antennas are extremely high.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]
• Magnetic Loop RF Safety - Notes on the intensity of RF Field calculated on magnetic loop antennas. The magnetic field intensity of a mag loop is considerably higher than the E field probably due to the inductive portion of the resonant circuit creating the radiation (magnetic) in the near field
  [ Hits: 858 | Votes: 3 | Rating: 4 ]

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