ESCO Technologies ETS-Lindgren 3115 User manual

©EMC TEST SYSTEMS, L.P. –MARCH 2002REV D–PN 399039
Model 3115
Double-Ridged
Waveguide Horn
MANUAL

MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039
EMC Test Systems, L.P. reserves the right to make changes to any productdescribedhereininorderto
improvefunction,design,orforany otherreason.Nothing containedhereinshall constituteEMCTest
Systems,L.P.assuming any liabilitywhatsoeverarising outoftheapplication oruseofany productor
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© Copyright 2002 by EMC Test Systems, L.P. All Rights Reserved.
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MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039
Table of Contents
INTRODUCTION..................................................................................1
MOUNTING INSTRUCTIONS............................................................2
APPLICATIONS ...................................................................................3
TYPICAL DATA ...................................................................................4
SPECIFICATIONS & MAINTENANCE.............................................7
WARRANTY STATEMENT ................................................................9

MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039

MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN Introduction
© EMC TEST SYSTEMS, L.P. –MARCH 20021
REV D–PN 399039
INTRODUCTION
The ETS-Lindgren Model 3115 Double Ridged Waveguide
Antenna is a linearly polarized broadband antenna covering
the frequency range of 1GHz to 18GHz. The Model 3115
was designed and built specifically for EMI measurements
and specifications compliance testing. However it can also
be used for antenna gain, pattern measurement, surveillance
and other applications.
The Model 3115 is ideally suited for IEC 61000-4-3 and
MIL-STD 461/462 immunity tests as well as ANSI C634
and EM 55033 emissions testing.
The antenna is precision machined from aluminum with
side plates of copperclad, tin-solder, epoxy fiberglass (G-
10). The 50 Vprecision high frequency type N connector is
mounted on the base block of the antenna. A bracket is
provided for standard tripod mounting in multiple
polarization positions.

Mounting Instructions MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
2© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039
MOUNTING INSTRUCTIONS
The Model 3115 consists of the following:
1 ea Double Ridged Waveguide Horn
1 ea Mounting Bracket with ¼-20 threads to accept ETS-
EMCO or other tripod mount
Step 1. The Model 3115 is shipped with the mounting bracket
attached backwards, for packaging purposes. Before the
antenna is mounted on a tripod the user will need to
unscrew the wing nut and separate the antenna from the
mounting bracket.
Step 2. To mount the antenna on the tripod, attach the antenna
bracket to the tripod with the ¼-20 bolt. To attach the
antenna to the antenna bracket, place the antenna in its
position locks, and tighten the wing nut. To rotate the
antenna, loosen the wing nut, reset the antenna in the
desired position lock and tighten the wing nuts.
Step 3. After you have mounted the Model 3115 onto the tripod or
tower you will be using for testing; connect an N-type
coaxial cable from the antenna connector to a signal
generator or amplifier.
Wingnut
Mounting Bracket
Type N Precision Female Connector

MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN Applications
© EMC TEST SYSTEMS, L.P. –MARCH 20023
REV D–PN 399039
APPLICATIONS
FCC-15
FCC-18
Radiated Emissions
NACSIM
IEC/CISPR/EN
SAE J1113
SAE J551
MIL-STD-462
Radiated Emissions, Radiated
Immunity (Susceptibility)
MIL-STD-1541
Transmit / Receive MIL-STD-285
Receive IEEE STD 299
Each Model 3115 Double Ridged Waveguide Antenna is
individually calibrated at 1 m per SAE ARP 958. Factors
for your antenna, with apparent gain at 1.0 meter from the
end of the antenna, have been determined and are included
with this manual along with a signed Certificate of
Calibration Conformance.
This factor should be used in specification compliance
testing to convert receiver reading (dBuV) to field intensity
units (dBuV/M). The conversion is accomplished by adding
the antenna factor in dB to the receiver reading in dB above
1 microvolt. To produce specific field strengths at one
meter spacings, see the Forward Power data on page 6.

Typical Data MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
4© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039
TYPICAL DATA
0 2 4 6 8 10 12 14 16 18
20
26
32
38
44
50
dB 1/m
Frequency (GHz)
Model 3115 Antenna Factor at 1 meter
0 2 4 6 8 10 12 14 16 18
4
7
10
13
16
19
22
25
dB
Frequency (GHz)
Model 3115 Gain

MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN Typical Data
© EMC TEST SYSTEMS, L.P. –MARCH 20025
REV D–PN 399039
0 2 4 6 8 10 12 14 16 18
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
VSWR
Frequency (GHz)
Model 3115 VSWR
0 2 4 6 8 10 12 14 16 18
0
10
20
30
40
50
60
70
80 E Plane H Plane
Frequency (Ghz)
Degrees
Model 3115 Half Power Beamwidth

Typical Data MODEL 3115 DOUBLE-RIDGED WAVEGUIDE HORN
6© EMC TEST SYSTEMS, L.P. –MARCH 2002
REV D–PN 399039
0 2 4 6 8 10 12 14 16 18
1E-4
1E-3
0.01
0.1
1
10
1 V/m CW
1 V/m 80%AM
3 V/m CW
3 V/m 80%AM
10 V/m CW
10 V/m 80% AM
Forward Power (W)
Frequency (GHz)
Model 3115 Forward Power at 1 meter 1V/m to 10V/m
12345678910 11 12 13 14 15 16 17 18
1
10
100
1000
200 V/m 80%AM
200 V/m CW
100 V/m 80%AM
100 V/m CW
Forward Power (W)
Frequency (GHz)
Model 3115 Forward Power at 1 meter 100V/m and 200V/m