Hits 

2 Meters Lindenblad Antenna


The two different parts are for building an ez-lindenblad 2 meters leo sat antenna


2 Meters Lindenblad Antenna



Antenna for UHF VHF Links

12



Antenna Half-Square
If you need a vertically polarized bi-directional 2-meter antenna with deep side nulls for direction finding or nulling out adjacent channel interference, try the half-square

Antenna HB9
La hb9 fa parte della famiglia delle antenne logaritmiche. Piu' precisamente e' una log periodica a soli 2 elementi, quindi un'antenna con tutti gli elementi attivi e non come la Yagi: un elemento attivo e tutti gli altri passivi

Antenna quad 144 MHz da appartamento
ho voluto provare a farne una versione da appartamento leggermente modificata a 6 elementi con guadagno teorico di 13 Db

Antenna VHF Topfkreis
Rispetto alla sperrtopf l'alimentazione viene portata all'esterno tramite un forellino dal quale fuoriesce un filo di rame collegato ad un bocchettone UHF

Antenne double quad 430/440Mhz
After simulation of the antenna on 435Mhz, the results are as follows and in reality the bandwidth is very good. 1.5: 1 between 430 / 440Mhz


Linear-loaded-short-dipole-21mhz

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

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

A simple SWR Meter is to be used at HF

A simple SWR Meter is to be used at HF An SWR meter provides information about how well matched is your antenna with the transmitter and how well power is being radiated