UHF (Ultra High Frequency) and VHF (Very High Frequency) represent the frequency types of radio transmit. UHF is a short-range communication frequency band that operates in the 300 MHz-3GHz bands, VHF is radio frequencies in the range between 30-300MHz.
这对 VHF/UHF 来说不是问题,但这些天线也可以从外面受益,因为障碍物的衰减会更小。 对于HF,我个人建议您首选MLA-30 环形天线,因为它是一项适度的投资,并且在如何配置方面相当灵活。我相信我们的定期撰稿人 Grayhat 会提供一些有用的建议,因为他是城市 HF 天线方面的专家。 此外,IC-R8600还是一款出色的宽带接收...
On the other hand, VHF wavelengths (e.g. MURS or the Marine radio band) have the potential to communicate longer distances than UHF. VHF waves can still make it through buildings and such,to an extent– but just not as well as UHF(and at a distance penalty in that environment). Howeve...
即使将天线放置在阳台上,在降低本底噪声方面也会产生很大的不同。这对 VHF/UHF 来说不是问题,但这些天线也可以从外面受益,因为障碍物的衰减会更小。 对于HF,我个人建议您首选MLA-30环形天线,因为它是一项适度的投资,并且在如何配置方面相当灵活。我相信我们的定期撰稿人 Grayhat 会提供一些有用的建议,因为他是城...
Path Loss Modeling for Near-Ground VHF Radio-Wave Propagation Through Forests with Tree-Canopy Reflection Effect This paper presents a new methodology to model the near-ground short-range propagation loss in forested areas at the VHF and the UHF band. The path loss modeling is performed by an ...
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