feed line length
8 links
Antennas : 6M : 6 meter J-Pole Antenna
- The Ugly MacGyver 6 meter J-pole Antenna
- Essentially, a J-pole is a 1/2 wave resonant antenna connected to a quarter wave matching stub. The feedline is connected at a point on the matching stub that is at the feedline's characteristic impedance. The result is 3/4 of a wavelength on one side and 1/4 wavelength on the other side.
[ Hits: 202 | Votes: 0 | Rating: 0 ]
- Extended Double Zepp NVIS Antenna Calculator
updated
- Extended Double Zepp measurements for all ham bands, and online calculator. The antenna is constructed much like an ordinary Dipole antenna but with 5/8 Wavelength Elements matched with an added Impedance Matching Section of balanced feed line
[ Hits: 123 | Votes: 3 | Rating: 7 ]
- The simplest phased array feed system that works
- How to calculate "phasing line" lengths that actually work.
[ Hits: 2176 | Votes: 4 | Rating: 6.75 ]
- 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 ]
- Super J-Pole for 435MHz
- The Super J Pole antenna is a co-linear vertical consisting of a number of half wave length vertical elements separated with half-wave length stubs (Tuning stub) feed with a folded matching stub by vk6ysf
[ Hits: 3369 | Votes: 6 | Rating: 5 ]
- Matching with one-twelfth-wavelength feed line
- Matching with a half wave or wuarter wave coaxial cable is pretty well known, but an existing 1961 system to do that with two one-twelfth-wavelength transmission lines.
[ Hits: 540 | Votes: 1 | Rating: 10 ]
- VHF/UHF Yagi Antenna Design
updated
pop
- Design your VHF UHF Yagi antenna online, a JavaScript enhanced web page that implements the design of an antenna for 2m and 70cm bands. This page offers a streamlined experience for Yagi antenna design enthusiasts. It assumes prior knowledge of Yagi design principles, minimizing distractions with a user-friendly interface. Equipped with essential equations, it provides instant design feedback. Red font warnings indicate design limitations, ensuring practical results. Constraints include Gain (11.8-21.6 dBd) and Boom Length (2.2-39 wavelengths), with additional frequency-dependent restrictions noted in input fields.
[ Hits: 147387 | Votes: 1105 | Rating: 6.95 ]
- Windom Antenna with 4:1 balun
- The Windom is an Off-center wire multiband Antenna. The old version was fed just by a single-wire connected on 1/3 of antenna's overall length or with an open-line feeder (later versions). Here is another model with coaxial feeder, which is compatible with Solid States - 50 Ohm output transceivers .
[ Hits: 8024 | Votes: 9 | Rating: 6.89 ]
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