That makes sense because the antenna is physically larger but at VHF the size didn’t seem a big difference. He even showed up a little real-world testing and, as you might predict, the test ...

With the advent of palm-sized miniaturized VHF antennas, interest in low-power and low-frequency communication links is increasing because (1) channel complexity is far less in this frequency band ...

One of the main challenges is the limited range of VHF radio, which depends on the height of the antenna, the power output, and the curvature of the earth. VHF radio usually has a range of about ...

The International Telecommunications Union (ITU) designates VHF (very high frequency) as frequencies from 30 to 300 MHz. VHF therefore lies directly above HF (high frequency: 3-30 MHz) and directly ...

Antennas AEP VHF-UHF antennas up to 6 meters long. For marine vessels, the MP4 model is more often used because it has a wide bandwidth, wide applicability and attached mounting nut. All other MP4xx ...

Abstract: Using multiple-receiver arrays, the techniques of spaced antennas and spatial domain interferometry have been widely utilized in mesosphere-stratosphere-troposphere (MST) VHF and meteor ...

River NEPTUNE VHF antenna, presented with a series of 3 antennas NEPTUNE - AB, NEPTUNE - 1.5 NEPTUNE - 0. 7. The antennas are suitable for most river VHF radiostations, as reception antennas.

Bands below HF, such as medium frecuencies (300 KHz to 3 Mhz) or even lower (less than 300 KHz) requires power well above the QRP levels and/or combined with very specialized antennas. Having VHF as ...

The model COM201B is a vertically polarized, omnidirectional antenna specifically designed for quick deployment and ease of operation. A unique tripod leg structure allows the antenna to be mounted ...

To be functional, generally speaking a basic station of satellite reception requires basic material : a simple VHF antenna erected in an open space (not to close to buildings), a receiver tuned on the ...

SwRI's AF-369 VHF/UHF Terrestrial Direction-Finding Antenna provides accurate direction finding of radio frequency transmissions from 20 MHz to 3 GHz. It was recognized by R&D Magazine as one of ...