ETS-Lindgren 3159 Biconical Antenna - Manual (Page 15)

Operation | 15
5.0 Operation
Before connecting any components or
operating the Model 3159, follow the safety
information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
The Model 3159 High-Power Biconical Antenna has a 4:1 Guanella balun for
matching the impedance to the amplifier. The balun maintains a low operating
temperature due to the efficient radiation pattern and high power design.
Model 3159 Pedestal
To prevent damage to the cables, you must
disconnect the RF cables from the Model 3159
before polarization or movement of the
boresight feature.
The Model 3159 pedestal has one air cylinder that controls the polarization
movement of the antenna. The switch on the back of the pedestal toggles
air control. Boresight is accomplished manually.
Electrical Field Distribution
The Model 3159 may be used for both horizontal and vertical polarization. It
exhibits a dipole-like radiation pattern; for example, a toroidal shape with an
omnidirectional pattern in the H-plane. In a low frequency range such as 30 MHz
(wavelength l = 10 m), the equipment under test (EUT) is in the near field of the
antenna, allowing the antenna to behave as a field generator.