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18 lis 2016 · Yes, a dual band will work fine. Since 2 meters is the lower frequency/longer wavelength, it just looks like a 2 meter antenna. Keep in mind, though: A 2 meter quarter wave is an odd 1/4 wave of 70cm. I've used 19" quarter wave whips on dual band radios with very good results. Putting the antenna on an analyzer shows it does both 2m and 70cm ...
The NA4IT "CHEAP" Dual Band 2/440Mhz Ground Plane Antenna. by ScottDuckworth. Editors Note - Here is a very easy to build dual band (2 meter/440) vertical ground plane antenna that may end up as your primary antenna for dual band operation or for emergency use.
W7LPN 2m/440 vertical dipole. The project below is my own design for a dualband vertical dipole for 2 meters and 440. It requires a balun and works very well. I like to tinker, so when I finish one project, I go on to another, even if it works well. There are several methods of constructing a vertical dualband dipole and a simple method is ...
COMPACtenna Model 2M/440 Dual-Band NMO Mobile Antennas are very small, high performance dual-band antennas. Even though they're only 7.5 inches tall, they provide superior Omni-directional coverage far beyond their size, using a unique, patented* Electric-Magnetic Field Diversity design.
Unless you are going for a super high gain antenna, most antennas will support both 440 and 2m. As a result, most (not all, but most) radios that do 2m also do 440 and visa versa. If you are trying to build an idealized rig, I'd shoot for 2m unless you are in an urban environment.
The diminutive 7.5" antenna has credible SWR and performance which matches or exceeds any other mobile unit I have used, because of its unique radiation design. This is not a typical end-fed loaded or center fed dipole.
Bottom Line. At only 9 inches tall, the COMPACtenna is an ideal low-profi le, dual-band antenna for cars that need low clearances or for a stealth station installation without compromising on performance. Reprinted with permission; copyright ARRL.
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