feed lines
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Antennas : Dipole- The Story of the Broadband Dipole
- A dipole can be broadbanded by a number of techniques including by matching with resonant sections of transmission feed lines.
[ Hits: 407 | Votes: 0 | Rating: 0 ]
- To transform ot not to transform - Feed Lines
- Transmission lines have many uses other than simply transferring RF power from one point to another.
Impedance matching, baluns and filters are probable the most common of these.
[ Hits: 137 | Votes: 0 | Rating: 0 ]
- ARRL - About Feed Lines
- The feed line (also called the transmission line) is the RF power conduit between your radio and your antenna. The quality of your feed line is critical to your station. ARRL Article that explains differences among various commonly used feed line systems
[ Hits: 88 | Votes: 2 | Rating: 6.5 ]
- Some secrets of Common Mode Chokes revealed
- This is a small collection of K9YC info and my experiences. Problems by feed lines of 1/2 lambda length. CMCs in transmitting and receiving systems. Antenna unbalance, Maximal allowed power, Choke winding tips.
[ Hits: 174 | Votes: 1 | Rating: 10 ]
- Moxon Mania - Building the Ultimate 4-Band Moxon Antenna
- The article details the design and construction of a four-band Moxon beam by a radio amateur. The beam, mounted atop a rooftop tower, aimed for gain over a dipole on 20 meters, cost under $500, and included additional bands. The design features fiberglass spreaders, four bands (20/15/10/6 meters), and a single feedpoint. The construction involved computer modeling, NEC source code, and specific dimensions. The article outlines the assembly, materials, and tuning process, including in-situ adjustments for optimal performance. Despite initial challenges, the beam improved signal strength and facilitated contacts on multiple bands, marking it as the best HF antenna the author has owned.
[ Hits: 94 | Votes: 0 | Rating: 0 ]
- 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 ]
- Practical Antenna Modeling with 4NEC2
- Presentation about Practical Antenna Modeling Using the NEC Codes with examples of HF wire antennas and 4NEC2. How to define and edit the models, Running the simulations, Work some examples, Variables usage, Deal with Feed Lines and ground
[ Hits: 473 | Votes: 0 | Rating: 0 ]
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