Atec EMCO-3106-3115-3116 - Manual (Page 9)

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Tel +1.512.531.6400
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Tel +358.2.838.3300
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EMCO’S COAXIAL FED PYRAMIDAL STANDARD GAIN & OCTAVE
HORN ANTENNAS cover a multi-octave bandwidth of 1 to
40 GHz in contiguous ranges. All models in the series are
linearly polarized, have medium gain, optimum half power
beamwidth (equal in both horizontal and vertical planes), and
low VSWR. Antenna factors are constant throughout the
entire operating frequency range. Comparisons of measured
versus computed gain have been found to be within ± 0.5 dB.
ANSI C63.4 recommends the use of standard gain horn
antennas as a reference standard above 1 GHz. Octave horns
are essentially the same as our standard gain horns, except
that they are equipped with waveguide-to-coaxial feeds which
are matched in frequency to common octave bandwidth
amplifier ranges.
Unlike other antennas of this type, each EMCO pyramidal
horn antenna comes assembled with a high performance, low
VSWR coaxial-to-waveguide adapter. When additional power
input levels are required, the coaxial feeds are easily removed
from the waveguides. Industry standard flanges mount
directly to amplifiers equipped with waveguide ports.
Precision Type N female connectors are used for antennas
operating below 18 GHz. Type K female connectors are used
above 18 GHz. A mounting bracket is included with all models
and allows either vertical or horizontal polarization measure-
ments.
Precision manufacturing contributes to the predictable
performance of these antennas. Models 3160-01 through 06
are welded using precise tooling and aluminum sheet metal.
Models 3160-07 and 08 are investment cast using an alumi-
num alloy. Models 3160-09 and 10 are electroformed using
copper deposition at the rate of 0.001 inch per hour.
EMCO Standard Gain Horn Antenna Features
Constant Antenna Factor
EMCO’s standard gain horns have a constant antenna factor
across their entire operating frequency, eliminating lookup in
multiple charts to calculate measurements. Above 1 GHz, the
antennas can be used as a reference standard per ANSI C63.4.
Increased Power Dissipation
While the coaxial feed allows power input of up to 550 W
(Model 3160-01, 02, 03), higher power input is possible by
removing the detachable feed and direct mounting the flange
to an amplifier waveguide port.
Optimal Beamwidth
The 3 dB beamwidth in both polarization planes is very nearly
equal at approximately 30 degrees. This is an optimum design
for EMC testing, providing good coverage of the EUT at
reasonable distances without the aiming problems of
“pencil beam” antennas.
Low VSWR
EMCO’s Standard Gain Horn Antennas provide a VSWR of
<1.5:1.
Complete with Feed, Waveguide,
and Mount
Unlike most antennas of this type, EMCO supplies a complete
unit with detachable coax-to-waveguide feed and mounting
brackets for both horizontal and vertical polarization. The
waveguide features industry-standard flange mounts.
Model 3160 01-10
.96 GHz – 40 GHz
Model 3161 01-03
1 GHz – 8 GHz
● Constant Antenna Factor
Over Frequency
● Increased Power Dissipation
● Optimal Beamwidth
● Low VSWR
● Complete with Feed,
Waveguide, and Mount
M O D E L 3 1 6 0 0 1 - 0 6
Standard Gain & Octave Horn