ETS-Lindgren 3161 Octave Horn Antenna - Manual (Page 7)

1.0 Introduction
The ETS-Lindgren Model 3161 Series Octave Bandwidth Pyramidal Horn
Antenna is designed specifically for emissions and immunity testing over the
1 GHz to 8 GHz frequency range. Characteristics of the Model 3161 Series
include linear polarization, medium gain, medium half-power beamwidth in both
the horizontal and vertical planes, low VSWR over the recommended operating
frequency range, and antenna factors constant within 2 dB. The wide bandwidth
was selected to allow use with octave bandwidth traveling-wave tube (TWT)
amplifiers without the need to change antennas over the band.
Each Model 3161 is furnished with a high performance, low VSWR, Type N
coax-to-waveguide adapter. This adapter limits antenna power-handling capacity,
and may be removed if a power source with waveguide output is available. In
such a configuration, fields in excess of 10,000 V/m at 10 meters are obtainable.
The Model 3161 Series is constructed of aluminum, and then is conversion
coated and painted for protection against corrosion and changes in the weather.
The Model 3161 Series can be used as transmit or receive antennas. The 50 Ω
input impedance is matched to most standard coax cables. In receiving
applications, the antennas are matched to the free space impedance (377 Ω).
Typical performance data is provided beginning on page 23. Methodology for
radiated emissions measurement is described on page 27.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment
for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
Introduction | 7