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How far apart should radio antennas be?
With most questions of this nature, there is an easy answer and a not so easy answer. The easy answer is that you should maintain a minimum mounting distance of at least 1/4 wavelength apart for the lowest frequency antenna within the same horizontal plane. For VHF antennas, that translates to roughly 19 inches.
Where should I point my radio antenna?
For best results, place your radio near a window facing this direction. Then, work on the antenna…. Antennas matter, but almost nobody pays attention to them. Most of the better FM radios and home stereos have some provision for an external antenna hook-up, and/or a built-in antenna rod or wire.
How big of an area do you need for a VHF antenna?
The easy answer is that you should maintain a minimum mounting distance of at least 1/4 wavelength apart for the lowest frequency antenna within the same horizontal plane. For VHF antennas, that translates to roughly 19 inches.
How to calculate distance between antenna and radio stack?
Since this is a ratio, it is easily expressed in dB. For example, Times Microwave LMR-400 (a model of coaxial cable popular for high-end amateur use) specifies that at 30 MHz (the high frequency end of HF), there will be 0.7 dB of loss in 100 ft of cable.
What should the distance between antenna and coax be?
(If you had a 100 W transmitter and 20 dB of loss, then you would be radiating only 1 W.) For that reason, if you put the antennas on top of the hill you would do well to choose antennas that have SWRs close to 1 already, or use a remote antenna tuner that is close to the antenna, so that the SWR on the coax is close to 1:1.
What happens when a transceiver is longer than an antenna?
The effect of a longer feed line between your transceiver and your antenna is increased loss — the signal will be weaker at the destination. If you are transmitting, this means that less of the power from your final amplifier (whether built into your radio or external) reaches the antenna and radiates.
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