Halfwave antenna

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Although it is actually a quarterwave antenna, its radiation pattern and characteristics are very similar to those of a halfwave vertical antenna. It also exhibits a slight gain compared to a quarterwave groundplane antenna.

This antenna radiates its signal in an omni-directional pattern like most vertical antennas do. Its operational bandwidth is 140 - 150 MHz and exhibits an SWR response of less than 1.5:1 over the entire band.