mardi 9 septembre 2014

2m / 70cm -- 1/4 or 5/8+ wavelength antenna -- House surrounded by hills

I am designing my base station, and realized that my house is surrounded by hills. Ugh.



They are not huge mountains. The hills are about 300-1,000 feet high, and about 1/2 - 2 miles away from me.



I was reading about antennas, and some suggested a smaller/lower wavelength antenna for higher radiating angles. Then again, I read where longer, lower radiating angles are okay because there is a type of diffraction over hilltops.



My roof is about 25 feet, and the antenna I was looking at (Jetstream) is about 10 feet.



Is there hard and fast rules about this, or is it more of a test-as-you-go-as-see-what-works-best sorta thing? Concerned about the latter, as I'm apart of an HOA and can't be up there multiple times... if I can help it.



Also... the link I pasted above for the Jetstream antenna... is that over a full wavelength??





Thanks, all!



-Andrew




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