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VHF Precision Dipole 30-300 MHz 2...
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Precision Half-Wave Test and Calibration Dipoles for VHF 30 - 300 MHz VHAP and UHF 300 MHz - 1 GHz UHAP, highest precision available for checking "site attenuation" on antenna ranges and precision field measurement and field generation.
The following general safety precautions should be considered when working with antennas:
Test Antennas for emission measurements (RX applications) do not generate any hazardous fieldstrength. For immunity testing and intentional generation of high fieldstrength the relevant emission and safety standards of the respective country must be considered (e.g. DIN VDE 0848).
The generated fieldstrength level can be estimated (free space propagation assumed) using the following equations
F = 134.8 + gi + 10 log P -20 log D | |
Fieldstrength Level | F [dBµV/m] |
Power into matched antenna | P [W] |
lsotropic Gain | gi [dBi] |
Distance | D [m] |
F=104.8 + gi + p - 20 log D | |
Power into matched anrenna | p [dBm] |