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40 Meter lazy H array
The LAZY "H" antenna is a general type of antenna that is in the curtain array family. you can achieve a HIGH GAIN bi-directional antenna
post 16 May 2024
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Frecuencias de 7.1 Mhz y 3.650 Mhz
This dipole antenna is very good for those with small spaces.The antenna is designed with two load coils that cut the frequency in a given band
L'antenne Hertz-Conrad-Windom
The Hertz antenna, known in the USA under the name of Windom, is a multiband wire antenna made up of a horizontal radiating element of lambda / 2 length and fed at one third of its length by a single feeder wire.
La W3dzz
After a gentle cleaning of the group, I notice that the condenser is located in the center of the inductor
Log periodic 4 elements
My main limitation being this small mast, I had to make a tough compromise and my 12 elements turned more realistically into a 4 elements design. The 4 elements were calculated to be part of a 8 element design, in case I could build it in future times
Low-Cost Broadband Travelling Wave Dipole
A dipole can be modified by inserting resistive loading networks so as to produce standing waves between the feedpoint and the networks. The authors have, by adjustment of the networks and the dipole sections, developed a travelling wave dipole whose VSWR is less than 2:1 from 3 to 15 MHz and does not exceed 2.6 to 1 from 2.3 to at least 30 MHz
160
This dipole antenna is very good for those with small spaces.The antenna is designed with two load coils that cut the frequency in a given band
The Hertz antenna, known in the USA under the name of Windom, is a multiband wire antenna made up of a horizontal radiating element of lambda / 2 length and fed at one third of its length by a single feeder wire.
After a gentle cleaning of the group, I notice that the condenser is located in the center of the inductor
My main limitation being this small mast, I had to make a tough compromise and my 12 elements turned more realistically into a 4 elements design. The 4 elements were calculated to be part of a 8 element design, in case I could build it in future times
A dipole can be modified by inserting resistive loading networks so as to produce standing waves between the feedpoint and the networks. The authors have, by adjustment of the networks and the dipole sections, developed a travelling wave dipole whose VSWR is less than 2:1 from 3 to 15 MHz and does not exceed 2.6 to 1 from 2.3 to at least 30 MHz
Linear loaded short dipole 21Mhz For my amateur radio activities on the HF bands I only have a 3.6 m wide balcony available for antennas. After some study I decided to experiment with a shortened dipole for the 15 m band
Rx antennas 4Square Rx Vertical Array My frequency design of 1.825 MHz a 90 degrees line would be 33,70 metersinstead of the previously calculated 33,27 m
Atu balanced feeder antenna system An ATU has the advantage of bringing the feeder-antenna system to resonance, act as a band pass filter both on receive and transmit and a low SWR