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Greetings
I have been reading about this new? broadband antenna... It seems mainly used in the short wave receiver domain but I also find newly licenced amateur also using it... It is a spin-off of the 'end fed' antenna but seems to have some point blurred in the translation..... The antenna is constructed as follows.... A random length of wire any where from 40 feet to 140 feet.. The end nearest the house is connected to one end of the high impedance end of a 9 to1 balun.. The other end of this end of the balun is connnected to ground... The arguement is that because the high impedance end is connected to ground that the antenna is quieter...less noise... The low impedance end of the balun is connected, via a length of 50 ohm cable, to the receiver... or transceiver... The other end of the cable is connecte to the receiver or transceiver and needs to use an antenna coupler..... My question.. is this a valid antenna.... Personally, I don't think so... I beleive that because the antenna comes to the radio in 50 ohm coad but still needs an antenna coupler the swr must be high therefore the antenna in not valid... Someone suggested that this design is a spin-off of an end fed dipole or zepp ...but I disagree...I think there are a few points missing for it to qualify as an end fed dipole or zepp... Larry ve3fxq anyways.. any thoughts?... |
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