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Relationship Between Antenna Efficiency and Received Signal Strength
"Irv Finkleman" wrote in message ... Q. Is there a relationship between the efficiency of an antenna and the received signal strength? Just pondering on the matter. Because I have to operate with restricted space antennas, usually with low efficiency, I wonder how much of a relationship exists between Efficiency and Received Signal Strength? Most of your problem is not going to be with the receiver. I am thinking that Yaesu is around 5 watts or less. For the most part you can just throw out any kind of antenna and hear lots more than you will be able to work with 5 watts. You can probably stick 10 to 15 feet of wire in the back of the rig and hear as much as you can with the MP-1 antenna in the same room. First I would get rid of that rig and get one with 100 watts out. Not that you can't work stations with 5 watts, but you will make many more cotacts with around 100 watts on a miminal antenna. For the antenna put up anything you can. You may need a good tuner to match the antenna. You did not say if you are in an apartment on a high floor. If so, stick up what ever you can vertical and load it with a coil if needed, and drop a wire toward the ground for about 1/4 wavelength. Forget about really trying to chart and graph any antenna for your situation, Just throw up something and get on the air. I would almost recommend one of the screwdriver type antennas and some wire for a ground plane or lower part of a dipole for your situation. For 20 meters and up you may give a dipole made out of 2 of the Hamstick type antennas a try. --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com |
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