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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 Scott Duckworth. 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.
27 sie 2020 · How does this dual band work? What acts as the impedance matching element and what is the radiating element? Does the smaller rod act as the impedance match for 2 m and the larger one for 440 MHz with the longest rod acting as the radiating element?
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.
After retiring and making the move to Florida, I purchased my first ELK antenna which was the Elk 2M/440L5 Dual-Bander, I dabbled with it for a compact antenna to use within my new 55+ community strictly for 2m & 70cm SSB, FM and repeater activity. Well; this is where it all comes together.
My new daily use dual band antenna, based on the results, is the ComPac 2/440+ . I should note that in addition to the other factors multi path was not noted with that antenna. However the Larson will remain my open road antenna of choice.
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.
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