ETS-Lindgren 3145BDP Dual-Polarized Log-Periodic Dipole Array - Manual (Page 7)

Introduction | 7
1.0 Introduction
The ETS-Lindgren Model 3145BDP Dual-Polarized Log-Periodic Dipole
Array is a dual linearly polarized, broadband antenna designed to operate over
the frequency range of 100 MHz to 1.1 GHz. The precise design of the feed and
positioning of the elements on the boom yields optimum phase relationship. This
causes the active region, at any given frequency, to propagate RF energy
towards the smaller elements, leaving the elements behind it electrically dead.
The constant gain of the antenna yields an antenna factor which varies linearly
with frequency. The variation is smooth; therefore, accurate interpolation of
performance between specified frequency points is simple.
The Model 3145BDP is manufactured from stainless steel, making it ideal for
prolonged outdoor use. A high resistance to oxidation and corrosion enables the
antenna to withstand a harsh operating environment. For a lighter-weight
antenna for indoor use, the Model 3145BDP may also be manufactured from
aluminum. Contact the ETS-Lindgren Sales Department for information on
custom antennas.
The Model 3145BDP is calibrated at 10 m per ANSI C63.5. Actual antenna
factors and a signed Certificate of Calibration Conformance are included with the
antenna.
Model 3145BDP Optional Items
The base of the Model 3145BDP features four mounting holes and two Type N
connectors. The holes may be used to mount the antenna to the optional
ETS-Lindgren 109620 Pedestal , or to a customer-defined mounting solution.