10 Element Quad-Yagi (Quagi) for 900 MHz Band
Elements 1-7 are spaced 3 inches (7.6 cm) apart on the boom. There is 6 inches (15.2 cm) between elements 7 and 8. There is 2 3/4 inches (7 cm) between elements 8 &...
Category: Antenna
5 element quad for 2m band
Boom Length – 1651 mm Distance between: Between Distance, mm R – V 432 V – D1 330 D1 – D2 406 D2 – D3 483 Dimenson of elements: Side, mm Diagonal, mm Perimeter,...
QRP Dummy Antenna
I needed a small dummy antenna for testing my Elecraft K2. It was to be small and capable of being used into the VHF range. It had to have a BNC connector, and it...
The Twelfth Wave Matching Network
Although the mismatch between 50 Ohm and 75 Ohm systems are usually acceptable, it’s easy to obtain a near perfect match using a pair of twelfth wave lines. The nice part is you only...
Inverted L antenna for Reception
Do to it’s ease of construction, the most popular antenna for short wave reception is the inverted “L” antenna. It’s often just a random length of wire strung up as high as possible. My...
A Simple 40m Vertical Antenna
The 40m band is a great place for DXing! I don’t have the tall supports needed for a dipole or beam, so a vertical antenna works best for me. I do have a convienent...
Antenna on the 40m band with low height of suspension
This is the simple “Delta Loop” Antenna on the 40m band with low height of suspension. Its upper corner located at the height of λ/4. I.e. for this antenna acceptable any mast with height...
Dipole antenna design. Some theory and construction.
A dipole antenna is a symmetrical antenna, consisting of two quarter wave elements, connected to each of the two conductors (inner and outer) of a coaxial cable. You will need a center insulator for...
Antenna Loop Feed Array Yagi on 50 MHz band
The Yagi antennas with a frame vibrator, located in the plane of the antenna, are called LFA-Yagi (Loop Feed Array Yagi) and are characterized by a greater operating frequency range than the usual Yagi....
Extended version of the W3DZZ-antenna
The antenna, shown in the drawing, is an extended version of the well-known W3DZZ-antenna, adapted for work on 160, 80, 40 and 10 m bands. For installation of the antenna it is necessary space...
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