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Antena Pemancar Radio FM
The antenna serves to radiate signals and radio wave radiation. Antenna generally divided into two by the beam, ie
bidirectional (both directions). This antenna radiates radio waves
as strong to just two directions. The two parameters that need to be
considered on an antenna is the polarization and penguatannya. Simply
put, an antenna has a vertical polarization if the antenna is placed in a position perpendicular to the earth. Antenna with vertical polarization will produce radio waves
with vertical polarization, too. In addition to vertical, there are
also berpolarisasi horizontal antenna, the antenna plays when the field
parallel to the earth.
Gambar antena FM Omnidirectional
One important factor in the FM antenna system installation
is the antenna height. In the VHF band, provided that communication can
take place is a LOS (Line Of Sight). So ideally communications on VHF,
the antenna receiver and transmitter both have seen each other. So in between there must be no objects that can absorb radio energy.
So
that radio amateurs in the VHF band is often stated that a better
antenna has a small gain but higher than the antenna mounted with a
large gain but low installed.
