ETS-Lindgren 3160 Series User manual

Model 3160 Series
Pyramidal Horn Antenna
User Manual

ETS-Lindgren L.P. reserves the right to make changes to any product described
herein in order to improve function, design, or for any other reason. Nothing
contained herein shall constitute ETS-Lindgren L.P. assuming any liability
whatsoever arising out of the application or use of any product or circuit
described herein. ETS-Lindgren L.P. does not convey any license under its
patent rights or the rights of others.
© Copyright 1992–2010 by ETS-Lindgren L.P. All Rights Reserved. No part
of this document may be copied by any means without written permission
from ETS-Lindgren L.P.
Trademarks used in this document: The ETS-Lindgren logo is a trademark of
ETS-Lindgren L.P.
Revision Record | MANUAL MODEL 3160 | Part #399185, Rev. D
Revision Description Date
A Initial Release February, 1992
B Edits/updates October, 2002
C Edits/updates July, 2003
D Rebrand July, 2010
ii |

Table of Contents
Notes, Cautions, and Warnings..............................................vii
1.0 Introduction..........................................................................9
ETS-Lindgren Product Information Bulletin .................................................10
2.0 Maintenance.......................................................................11
Annual Calibration .......................................................................................11
Service Procedures .....................................................................................12
3.0 Specifications.....................................................................13
Electrical Specifications ...............................................................................13
Physical Specifications ................................................................................14
4.0 Mounting Instructions.......................................................15
3160-09 and 3160-10 Only ..........................................................................16
3160-09................................................................................................16
3160-10................................................................................................16
Mount to 4-TR..............................................................................................17
Mount to 7-TR and Mast ..............................................................................17
Mount to 2x2 Boom......................................................................................18
5.0 Typical Data........................................................................19
Typical VSWR (3160-06) .............................................................................19
Typical Gain and Antenna Factor (3160-06)................................................20
Typical Half-Power Beamwidth (3160-06) ...................................................21
6.0 Radiated Emissions Measurements ................................23
Measure Ambient Field Strength Values .....................................................23
Conversion Formulas...................................................................................24
Equation 1............................................................................................24
Equation 2............................................................................................25
Equation 3............................................................................................25
Equation 4............................................................................................25
Equation 5............................................................................................25
Equation 6............................................................................................26
Equation 7............................................................................................26
Equation 8............................................................................................26
| iii

Equation 9............................................................................................26
Appendix A: Warranty.............................................................27
Appendix B: Power Requirements.........................................29
3160-01........................................................................................................30
Table 1: Model 3160-01 Power Requirements at 1 Meter ...................30
Table 2: Model 3160-01 Power Requirements at 3 and 10 Meters .....30
3160-02........................................................................................................31
Table 3: Model 3160-02 Power Requirements at 1 Meter ...................31
Table 4: Model 3160-02 Power Requirements at 3 and 10 Meters .....31
3160-03........................................................................................................32
Table 5: Model 3160-03 Power Requirements at 1 Meter ...................32
Table 6: Model 3160-03 Power Requirements at 3 and 10 Meters .....32
3160-04........................................................................................................33
Table 7: Model 3160-04 Power Requirements at 1 Meter ...................33
Table 8: Model 3160-04 Power Requirements at 3 and 10 Meters .....33
3160-05........................................................................................................34
Table 9: Model 3160-05 Power Requirements at 1 Meter ...................34
Table 10: Model 3160-05 Power Requirements at 3 and 10 Meters ...34
3160-06........................................................................................................35
Table 11: Model 3160-06 Power Requirements at 1 Meter .................35
Table 12: Model 3160-06 Power Requirements at 3 and 10 Meters ...35
3160-07........................................................................................................36
Table 13: Model 3160-07 Power Requirements at 1 Meter .................36
Table 14: Model 3160-07 Power Requirements at 3 and 10 Meters ...36
3160-08........................................................................................................37
Table 15: Model 3160-08 Power Requirements at 1 Meter .................37
Table 16: Model 3160-08 Power Requirements at 3 and 10 Meters ...37
3160-09........................................................................................................38
Table 17: Model 3160-09 Power Requirements at 1 Meter .................38
Table 18: Model 3160-09 Power Requirements at 3 and 10 Meters ...38
3160-10........................................................................................................39
Table 19: Model 3160-10 Power Requirements at 1 Meter .................39
Table 20: Model 3160-10 Power Requirements at 3 and 10 Meters ...39
Appendix C: Model 3160 Series Data.....................................41
3160-01........................................................................................................41
VSWR: 3160-01...................................................................................41
iv |

Gain / Antenna Factor: 3160-01 ..........................................................41
Half-Power Beamwidth: 3160-01 .........................................................42
Antenna Pattern: 3160-01 at 1.2 GHz .................................................43
3160-02........................................................................................................44
VSWR: 3160-02...................................................................................44
Gain / Antenna Factor: 3160-02 ..........................................................44
Half-Power Beamwidth: 3160-02 .........................................................45
Antenna Pattern: 3160-02 at 1.41 GHz ...............................................46
3160-03........................................................................................................47
VSWR: 3160-03...................................................................................47
Gain / Antenna Factor: 3160-03 ..........................................................47
Half-Power Beamwidth: 3160-03 .........................................................48
Antenna Pattern: 3160-03 at 2.15 GHz ...............................................49
3160-04........................................................................................................50
VSWR: 3160-04...................................................................................50
Gain / Antenna Factor: 3160-04 ..........................................................50
Half-Power Beamwidth: 3160-04 .........................................................51
Antenna Pattern: 3160-04 at 3.3 GHz .................................................52
3160-05........................................................................................................53
VSWR: 3160-05...................................................................................53
Gain / Antenna Factor: 3160-05 ..........................................................53
Half-Power Beamwidth: 3160-05 .........................................................54
Antenna Pattern: 3160-05 at 4.9 GHz .................................................55
3160-06........................................................................................................56
VSWR: 3160-06...................................................................................56
Gain / Antenna Factor: 3160-06 ..........................................................56
Half-Power Beamwidth: 3160-06 .........................................................57
Antenna Pattern: 3160-06 at 7.0 GHz .................................................58
3160-07........................................................................................................59
VSWR: 3160-07...................................................................................59
Gain / Antenna Factor: 3160-07 ..........................................................59
Half-Power Beamwidth: 3160-07 .........................................................60
Antenna Pattern: 3160-07 at 10.3 GHz ...............................................61
3160-08........................................................................................................62
VSWR: 3160-08...................................................................................62
Gain / Antenna Factor: 3160-08 ..........................................................62
| v

Half-Power Beamwidth: 3160-08 .........................................................63
Antenna Pattern: 3160-08 at 15.2 GHz ...............................................64
3160-09........................................................................................................65
VSWR: 3160-09...................................................................................65
Gain / Antenna Factor: 3160-09 ..........................................................65
Half-Power Beamwidth: 3160-09 .........................................................66
Antenna Pattern: 3160-09 at 22.0 GHz ...............................................67
3160-10........................................................................................................68
VSWR: 3160-10...................................................................................68
Gain / Antenna Factor: 3160-10 ..........................................................68
Half-Power Beamwidth: 3160-10 .........................................................69
Antenna Pattern: 3160-10 at 33.0 GHz ...............................................70
vi |

Notes, Cautions, and Warnings
Note: Denotes helpful information intended to
provide tips for better use of the product.
Caution: Denotes a hazard. Failure to follow
instructions could result in minor personal injury
and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow
instructions could result in SEVERE personal injury
and/or property damage. Included text gives proper
procedures.
See the ETS-Lindgren Product Information Bulletin for safety,
regulatory, and other product marking information.
| vii

viii |
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1.0 Introduction
The ETS-Lindgren Model 3160 Series Pyramidal Horn Antenna is a series of
pyramidal standard gain horn antennas designed specifically for utilization in
emissions and immunity testing over the frequency range of 1 GHz to 40 GHz.
The Model 3160 Series includes models 3160-01 through 3160-10.
Each Model 3160 Series antenna is linearly polarized and has medium gain,
wide half-power beamwidth (HPBW) in both the horizontal and vertical planes,
low VSWR over the recommended operating frequency range, and constant
antenna factors so that the antennas can be used without looking up tables or
charts.
The performance of the Model 3160 Series is precise and predictable through
design parameters. Both input and output are well matched to 50 Ωand 377 Ω
respectively. Comparisons of measured versus computed gain and antenna
factors have been found to be within ±0.5dB. The Model 3160 Series antennas
are considered to be the standard reference of measurements above 1 GHz, as
is the resonant dipole for measurements below 1 GHz.
Each Model 3160 Series antenna is ruggedly constructed for good
electromagnetic performance.
•Models 3160-01 through 3160-06 are welded using precise toolings
and aluminum sheet metal.
•Models 3160-07 and 3160-08 are investment casted using an
aluminum compound.
•Models 3160-09 and 3160-10 are electroformed using deposition of
copper at a rate of 0.001 inch/hour for the highest precision available.
•Models 3160-01 through 3160-08 are conversion coated and painted
for protection against corrosion and changes in the weather.
Each Model 3160 Series antenna comes completely assembled with a
high performance, low VSWR, coax-to-waveguide adapter. Below 18 GHz, the
transition from coax to waveguide is made using a female Precision N connector.
Above 18 GHz, the transition uses female K connectors. The coax-to-waveguide
adapters are the only power-limiting component, and can be removed if
high fields are desired. For this purpose, the RF generator must be equipped with
waveguide ports. In such a configuration, fields in excess of 10,000 V/m at
10 meters can be obtained.
Introduction | 9

Each Model 3160 Series antenna comes with a standard 1/4–20 mount.
Horizontal and vertical polarizations are obtained by rotating the antennas from
one position on the mount to the other. The mounts have been placed so as not
to interfere with incoming electromagnetic energy. For the variety of mounting
options available for the Model 3160 Series, see Mounting Instructions on
page 15.
The Model 3160 Series may be used for either transmission or reception. The
50 ohm input impedance is well-matched for generating high electric fields with
little power reflected back to the amplifier, reducing the chance of saturation. As
a receiver, the antennas are matched to free space (377 ohms). Typical
performance data is provided beginning on page 19. Methods for radiated
emissions measurement are described on page 23.
For TEMPEST applications, all Model 3160 Series antennas, especially models
3160-03 and up, can be mounted on standard 12-, 18-, or 24-inch reflector
dishes. The resulting antenna factor is usually about 20 dB lower than that of the
antennas by themselves. However, the HPBW drops to less than 50 and the
far field distance increases drastically making near field performance less
predictable.
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
10 | Introduction

2.0 Maintenance
Before performing any maintenance,
follow the safety information in the
ETS-Lindgren Product Information
Bulletin included with your shipment.
Maintenance of the Model 3160 Series is
limited to external components such as
cables or connectors.
If you have any questions concerning
maintenance, contact ETS-Lindgren
Customer Service.
WARRANTY
•When not in use, the Model 3160 Series Pyramidal Horn Antenna
should be stored on a shelf face down to keep dust out of the feed
areas.
•If the Model 3160 Series is used outdoors, the antennas should be
checked for water accumulations. Water has a high dielectric constant
and can alter performance.
•If an antenna is dropped, the feed/horn joint should be checked for
misalignment.
Annual Calibration
The electromagnetic performance of the Model 3160 Series is almost exclusively
dependent on the physical dimensions of the horns. Comparisons with
computed gain and antenna factor result in differences within 1 dB. Therefore, it
is not necessary to calibrate Model 3160 Series antennas; only a mechanical
check is required to guarantee performance. However, if calibration is required,
see the Product Information Bulletin included with your shipment for information
on ETS-Lindgren calibration services.
Maintenance | 11

Service Procedures
For the steps to return a system or system component to ETS-Lindgren for
service, see the Product Information Bulletin included with your shipment.
12 | Maintenance

3.0 Specifications
Electrical Specifications
•The VSWR indicated in the following table is that of the pyramidal horn
antenna and coax-to-waveguide adapter. The VSWR of the antenna by
itself is of the order of 1.1:1.
•The maximum continuous power indicated in the following table is
mainly limited by the coax-to-waveguide adapter. The antenna itself is
capable of handling continuous power on the order of 104Watts to
107Watts.
Specifications | 13

Physical Specifications
14 | Specifications

4.0 Mounting Instructions
Before connecting any components, follow the
safety information in the ETS-Lindgren
Product Information Bulletin included with your
shipment.
The Model 3160 Series antennas are precision
measurement devices. Handle your antenna
with care.
Horizontal and vertical polarizations can be achieved by rotating the
antenna from one mount to the other.
The Model 3160 Series Pyramidal Horn Antenna is equipped with a standard
1/4–20 mount. The mount is placed so as not to interfere with incoming
electromagnetic energy.
Once mounted, remove the red cover from the Type N connector and attach a
cable between the antenna and a transmitting/receiving RF device. Rotate the
antenna for horizontal and vertical polarizations as needed.
Mounting Instructions | 15

3160-09 and 3160-10 Only
The 3160-09 and 3160-10 antennas ship with a supplemental mount that may be
used with the 4-TR Tripod, 7-TR Tripod, mast, and 2x2 boom.
3160-09
•103255 Clamping Block
•103256 Mounting Bracket
3160-10
•103253 Clamping Block
•103254 Mounting Bracket
16 | Mounting Instructions

Mount to 4-TR
Model 3160 Series antennas mount directly to an ETS-Lindgren 4-TR Tripod; no
additional hardware is required. Secure the mount onto the 4-TR by tightening
the1/4–20 UNC mount knob.
Mount to 7-TR and Mast
Following is an option for mounting the Model 3160 Series onto an ETS-Lindgren
7-TR Tripod or mast. Contact the ETS-Lindgren Sales Department for
information on ordering optional mounting hardware.
Mast refers to 2070 Series, 2075,
and 2175 Antenna Towers.
7-TR refers to 109042, 106328,
and 108197 booms:
•109042 boom—Straight
boom; for general antenna
mounting on a 7-TR
•106328 boom—Offset boom;
for general antenna mounting
on a 7-TR with pneumatic or
manual polarization
•108197 boom—Center rotate
boom; for rear-mount
stinger-type antennas only
Mounting Instructions | 17

Mount to 2x2 Boom
Following are options for mounting the Model 3160 Series onto a 2x2 boom.
Contact the ETS-Lindgren Sales Department for information on ordering optional
mounting hardware.
2x2 boom refers to a typical 2-inch by 2-inch boom.
18 | Mounting Instructions

5.0 Typical Data
Following is typical electromagnetic performance data for the Model 3160 Series
Pyramidal Horn Antenna, using Model 3160-06 data as representative of the
series. See Model 3160 Series Data on page 41 for data for all
Model 3160 Series antennas.
Typical VSWR (3160-06)
The following shows the antenna/coax-to-waveguide adapter assembly.
Typical Data | 19

Typical Gain and Antenna Factor (3160-06)
Following is a plot of computed and measured gain and antenna factor versus
frequency. The measured and computed results are within 3 dB, which is typical
of pyramidal horns. Differences are attributed to imperfections in the
measurements setup. The left vertical scale is for the gain measured in dBi, and
the right vertical scale is for the antenna factor in dB(m-1). The antenna factor
spans only 0.6 dB from minimum to maximum; therefore, it may be considered
constant over the entire frequency band without loss of accuracy. The gain is
computed from the antenna factor using:
G(dB) = 20 log (
f
) - AF + 30.22
GHz dB(m-1)
20 | Typical Data