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Model 3160 Series

Pyramidal Horn Antenna

User Manual

Summary of content (90 pages)

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Model 3160 Series Pyramidal Horn Antenna User Manual
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ETS-Lindgren Inc. 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 Inc. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. ETS-Lindgren Inc. does not convey any license under its patent rights or the rights of others. © Copyright 1992–2014 by ETS-Lindgren Inc. All Rights Reserved.
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Table of Contents Notes, Cautions, and Warnings .............................................. vii 1.0 Introduction .......................................................................... 9 Tripod Options .......................................................................................... 11 ETS-Lindgren Product Information Bulletin ............................................... 12 2.0 Maintenance ....................................................................... 13 Annual Calibration ......
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Calculated Far Field Gain ......................................................................... 39 Geometry of the Horns ...................................................................... 40 Calculated Gain ................................................................................ 40 Typical Half-Power Beamwidth (3160-06) ................................................. 42 6.0 Radiated Emissions Measurements ................................ 43 Measure Ambient Field Strength Values ..........
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Table 11: Model 3160-06 Power Requirements at 1 Meter ................ 56 Table 12: Model 3160-06 Power Requirements at 3 and 10 Meters .. 56 3160-07 .................................................................................................... 57 Table 13: Model 3160-07 Power Requirements at 1 Meter ................ 57 Table 14: Model 3160-07 Power Requirements at 3 and 10 Meters .. 57 3160-08 ....................................................................................................
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3160-05 .................................................................................................... 73 VSWR: 3160-05 ................................................................................ 73 Gain / Antenna Factor: 3160-05 ........................................................ 73 Half-Power Beamwidth: 3160-05 ....................................................... 74 Antenna Pattern: 3160-05 at 4.9 GHz ............................................... 75 3160-06 ...........................
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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.
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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.
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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.
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Tripod Options Do not mount the Model 3160-01 or Model 3160-02 to a 4-TR. ETS-Lindgren offers the following non-metallic, non-reflective tripods for use at both indoor and outdoor EMC test sites.  4-TR Tripod—Constructed of linen phenolic and delrin, designed with an adjustable center post for precise height adjustments. Maximum height is 2.0 m (80.0 in), and minimum height is 94 cm (37.0 in). This tripod can support up to an 11.8 kg (26.0 lb) load.
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ETS-Lindgren Product Information Bulletin See the ETS-Lindgren Product Information Bulletin included with your shipment for the following: 12  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 www.ets-lindgren.
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2.0 Maintenance Before performing any maintenance, follow the safety information in the ETS-Lindgren Product Information Bulletin included with your shipment. WARRANTY 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.  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.
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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. 14 Maintenance www.ets-lindgren.
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3.0 Specifications Electrical Specifications MODEL 3160 SERIES  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 4 capable of handling continuous power on the order of 10 Watts to 7 10 Watts.
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MODEL 3160-U5 Far field gain computed using full wave analysis MW Studio. 16 Frequency (MHz) Computed Gain (dBi) Numeric Gain 500 16.42 43.87 1.48 510 16.76 47.37 1.43 520 16.95 49.52 1.35 530 17.02 50.40 1.24 540 17.06 50.80 1.13 550 17.11 51.44 1.07 560 17.21 52.56 1.12 570 17.32 53.93 1.17 580 17.42 55.19 1.17 590 17.50 56.25 1.13 600 17.58 57.30 1.07 610 17.68 58.55 1.06 620 17.78 60.01 1.13 630 17.88 61.44 1.18 640 17.96 62.55 1.
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Frequency (MHz) Computed Gain (dBi) Numeric Gain VSWR 690 18.50 70.79 1.09 700 18.64 73.11 1.13 710 18.71 74.30 1.16 720 18.70 74.13 1.16 760 18.65 73.22 1.14 740 18.53 71.30 1.12 750 18.50 70.86 1.10 MODEL 3160-U7 Far field gain computed using full wave analysis MW Studio. Frequency (MHz) Computed Gain (dBi) Numeric Gain VSWR 750 14.64 29.09 1.35 760 14.77 29.99 1.33 770 14.90 30.91 1.34 780 15.03 31.84 1.38 790 15.15 32.77 1.41 800 15.26 33.60 1.
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Frequency (MHz) Computed Gain (dBi) Numeric Gain VSWR 840 15.51 35.57 1.11 850 15.57 36.07 1.07 860 15.64 36.67 1.11 870 15.73 37.39 1.16 890 15.93 39.14 1.19 900 16.04 40.15 1.18 910 16.15 41.24 1.16 920 16.27 42.35 1.12 930 16.38 43.45 1.09 940 16.49 44.53 1.08 950 16.59 45.56 1.11 960 16.68 46.51 1.16 970 16.76 47.37 1.22 980 16.82 48.12 1.26 990 16.88 48.76 1.28 1000 16.93 49.37 1.27 Specifications www.ets-lindgren.
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Physical Specifications MODEL 3160 SERIES www.ets-lindgren.
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MODEL 3160-U5 AND MODEL 3160-U7: STANDARD GAIN HORNS BELOW 1 GHZ MODEL 3160-U5 Weight (approximate): 95.3 kg (210.0 lb) Two mounting subframes with hardware are provided with the Model 3160-u5. Hardware for customer mount is not provided. 20 Specifications www.ets-lindgren.
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Model 3160-u5 Aperture View www.ets-lindgren.
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Model 3160-u5 Side View 22 Specifications www.ets-lindgren.
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Model 3160-u5 Back View www.ets-lindgren.
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Model 3160-u5 Bottom View Clearance holes (7) in bottom of subframe are for M8 or 3/8–16 bolts. Hardware not provided. 24 Specifications www.ets-lindgren.
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MODEL 3160-U7 Weight (approximate): 32.7 kg (72.0 lb) Two mounting platforms are provided with the Model 3160-u7. Mounting fasteners (1/4–20) are not provided. www.ets-lindgren.
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Model 3160-u7 Aperture View 26 Specifications www.ets-lindgren.
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Model 3160-u7 Side View www.ets-lindgren.
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Model 3160-u7 Back View 28 Specifications www.ets-lindgren.
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Model 3160-u7 Bottom View www.ets-lindgren.
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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.
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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 32 Mounting Instructions www.ets-lindgren.
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Mount to 4-TR Do not mount the Model 3160-01 or Model 3160-02 to a 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. www.ets-lindgren.
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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.
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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. www.ets-lindgren.
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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 61 for data for all Model 3160 Series antennas. Typical VSWR (3160-06) The following shows the antenna/coax-to-waveguide adapter assembly. www.ets-lindgren.
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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 -1 the right vertical scale is for the antenna factor in dB(m ). The antenna factor spans only 0.
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Calculated Far Field Gain The gain of a pyramidal horn (linear gain, not dB) is calculated as follows: [ ( ) ( )] [( ( ) ( )) ( ( ) ( )) ] Where √ ( √ √ ) And √ √ ( √ ) Finally √ And C(x) and S(x) are the Fresnel Cosine Integral and the Fresnel Sine Integral functions. www.ets-lindgren.
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GEOMETRY OF THE HORNS units in cm or degrees aperture waveguide flare Flares E and H angle H angle E A B a b L lE lH 3160-u5 41 36 155.42 120.88 35.56 17.78 159.16 253.11 171.98 3160-u7 32 28 80.41 59.99 25.07 12.38 96.14 167.07 108.31 3160-01 32 28 62.58 49.87 19.56 9.78 75.00 130.35 90.44 3160-02 32 27 52.82 39.55 16.51 8.26 64.00 111.20 72.46 3160-03 31 28 34.00 26.00 10.92 5.46 41.52 70.93 48.64 3160-04 23 20 23.50 17.50 7.21 3.
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3160-03 3160-04 3160-05 3160-06 Frequency G Frequency G Frequency G Frequency G 1.7 14.34 2.6 14.811 3.95 14.9746 5.85 15.6617 1.88 15.1526 2.87 15.6315 4.33 15.7343 6.32 16.2986 2.06 15.8791 3.14 16.371 4.71 16.4232 6.79 16.8847 2.24 16.5331 3.41 17.0425 5.09 17.09 7.26 17.4266 2.42 17.1247 3.68 17.6558 5.47 17.6294 7.73 17.9293 2.6 17.6622 3.95 18.2182 5.85 18.161 8.2 18.
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Typical Half-Power Beamwidth (3160-06) Following is a plot of the half-power beamwidth (HPBW) versus frequency. The information provides the size of the Equipment Under Test (EUT) that can be illuminated without scanning. The size of the EUT can be obtained as: EUT = 2 [ Distance · tan ( HPBW )] 2 Distance is the distance between the EUT and the aperture of the antenna 42 Typical Data www.ets-lindgren.
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6.0 Radiated Emissions Measurements Measure Ambient Field Strength Values 1. Install the antenna where measured field strength values are desired. 2. Adjust the desired orientation of the antenna for both bore site direction and polarization. 3. Connect the output connector of the antenna to the input of the receiving system using a low VSWR, low loss coaxial cable. The Model 3160 Series Pyramidal Horn Antennas are designed for receiving systems having 50 Ω input impedance.
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The losses of the coaxial cable, Ac , should be included in the computations.
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EQUATION 2 dB(mW /m2) = dB(V/m)-115.8 The constant in this equation is obtained by considering the 2 Poynting vector which relates the power density in (W/m ) to the electric field strength in (V/m) by: P= E 2  Where η is the free space characteristic impedance equal to 120π Ω.
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20 log 10 (120  )  51. 5 EQUATION 6 A/m = 10 dB ( A/m)-120 20 EQUATION 7 dB(W/m2) = 10 log (V/m  A/m) EQUATION 8 dB(mW/m2) = dB(W/m2) + 30.0 EQUATION 9 dB(pT) = dB(A/m) + 2.0 The magnetic flux density B in (T) is related to the magnetic field strength H in (A/m) by the permeability of the medium in (H/m). For -7 free space, the permeability is µo = 4π.10 H/m. Converting from (T) to (pT) and from (A/m) to (µA/m) and taking the log, the constant becomes: 240  120  20 log 10 ( 4   10 7 )  2.
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Appendix A: Warranty See the Product Information Bulletin included with your shipment for the complete ETS-Lindgren warranty for your Model 3160 Series. DURATION OF WARRANTIES FOR MODEL 3160 SERIES All product warranties, except the warranty of title, and all remedies for warranty failures are limited to two years. Product Warranted Duration of Warranty Period Model 3160 Series Pyramidal Horn Antenna 2 Years www.ets-lindgren.
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Appendix B: Power Requirements The Model 3160 Series Pyramidal Horn Antenna is an efficient transmitting antenna, capable of generating high electric field strengths using little power. For a given electric field strength, the required power can be computed using the transmission equation: Power Transmitted= Pt  (Field Strength ) 2 ( Distance in meters) 2 (30  Numeric Gain ) 2 E R2 30 g The typical power requirements in Watts for the 3161-06 are shown in Table 11 Table 12 on page 56.
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3160-01 TABLE 1: MODEL 3160-01 POWER REQUIREMENTS AT 1 METER TABLE 2: MODEL 3160-01 POWER REQUIREMENTS AT 3 AND 10 METERS 50 Power Requirements www.ets-lindgren.
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3160-02 TABLE 3: MODEL 3160-02 POWER REQUIREMENTS AT 1 METER TABLE 4: MODEL 3160-02 POWER REQUIREMENTS AT 3 AND 10 METERS www.ets-lindgren.
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3160-03 TABLE 5: MODEL 3160-03 POWER REQUIREMENTS AT 1 METER TABLE 6: MODEL 3160-03 POWER REQUIREMENTS AT 3 AND 10 METERS 52 Power Requirements www.ets-lindgren.
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3160-04 TABLE 7: MODEL 3160-04 POWER REQUIREMENTS AT 1 METER TABLE 8: MODEL 3160-04 POWER REQUIREMENTS AT 3 AND 10 METERS www.ets-lindgren.
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Power Requirements www.ets-lindgren.
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3160-05 TABLE 9: MODEL 3160-05 POWER REQUIREMENTS AT 1 METER TABLE 10: MODEL 3160-05 POWER REQUIREMENTS AT 3 AND 10 METERS www.ets-lindgren.
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3160-06 TABLE 11: MODEL 3160-06 POWER REQUIREMENTS AT 1 METER TABLE 12: MODEL 3160-06 POWER REQUIREMENTS AT 3 AND 10 METERS 56 Power Requirements www.ets-lindgren.
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3160-07 TABLE 13: MODEL 3160-07 POWER REQUIREMENTS AT 1 METER TABLE 14: MODEL 3160-07 POWER REQUIREMENTS AT 3 AND 10 METERS www.ets-lindgren.
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3160-08 TABLE 15: MODEL 3160-08 POWER REQUIREMENTS AT 1 METER TABLE 16: MODEL 3160-08 POWER REQUIREMENTS AT 3 AND 10 METERS 58 Power Requirements www.ets-lindgren.
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3160-09 TABLE 17: MODEL 3160-09 POWER REQUIREMENTS AT 1 METER TABLE 18: MODEL 3160-09 POWER REQUIREMENTS AT 3 AND 10 METERS www.ets-lindgren.
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3160-10 TABLE 19: MODEL 3160-10 POWER REQUIREMENTS AT 1 METER TABLE 20: MODEL 3160-10 POWER REQUIREMENTS AT 3 AND 10 METERS 60 Power Requirements www.ets-lindgren.
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Appendix C: Model 3160 Series Data 3160-01 VSWR: 3160-01 GAIN / ANTENNA FACTOR: 3160-01 www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-01 62 Model 3160 Series Data www.ets-lindgren.
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ANTENNA PATTERN: 3160-01 AT 1.2 GHZ H-PLANE: 3160-01 E-PLANE: 3160-01 www.ets-lindgren.
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3160-02 VSWR: 3160-02 GAIN / ANTENNA FACTOR: 3160-02 64 Model 3160 Series Data www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-02 www.ets-lindgren.
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ANTENNA PATTERN: 3160-02 AT 1.41 GHZ H-PLANE: 3160-02 E-PLANE: 3160-02 66 Model 3160 Series Data www.ets-lindgren.
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3160-03 VSWR: 3160-03 GAIN / ANTENNA FACTOR: 3160-03 www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-03 68 Model 3160 Series Data www.ets-lindgren.
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ANTENNA PATTERN: 3160-03 AT 2.15 GHZ H-PLANE: 3160-03 E-PLANE: 3160-03 www.ets-lindgren.
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3160-04 VSWR: 3160-04 GAIN / ANTENNA FACTOR: 3160-04 70 Model 3160 Series Data www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-04 www.ets-lindgren.
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ANTENNA PATTERN: 3160-04 AT 3.3 GHZ H-PLANE: 3160-04 E-PLANE: 3160-04 72 Model 3160 Series Data www.ets-lindgren.
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3160-05 VSWR: 3160-05 GAIN / ANTENNA FACTOR: 3160-05 www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-05 74 Model 3160 Series Data www.ets-lindgren.
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ANTENNA PATTERN: 3160-05 AT 4.9 GHZ H-PLANE: 3160-05 E-PLANE: 3160-05 www.ets-lindgren.
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3160-06 VSWR: 3160-06 GAIN / ANTENNA FACTOR: 3160-06 76 Model 3160 Series Data www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-06 www.ets-lindgren.
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ANTENNA PATTERN: 3160-06 AT 7.0 GHZ H-PLANE: 3160-06 E-PLANE: 3160-06 78 Model 3160 Series Data www.ets-lindgren.
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3160-07 VSWR: 3160-07 GAIN / ANTENNA FACTOR: 3160-07 www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-07 80 Model 3160 Series Data www.ets-lindgren.
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ANTENNA PATTERN: 3160-07 AT 10.3 GHZ H-PLANE: 3160-07 E-PLANE: 3160-07 www.ets-lindgren.
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3160-08 VSWR: 3160-08 GAIN / ANTENNA FACTOR: 3160-08 82 Model 3160 Series Data www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-08 www.ets-lindgren.
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ANTENNA PATTERN: 3160-08 AT 15.2 GHZ H-PLANE: 3160-08 E-PLANE: 3160-08 84 Model 3160 Series Data www.ets-lindgren.
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3160-09 VSWR: 3160-09 GAIN / ANTENNA FACTOR: 3160-09 www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-09 86 Model 3160 Series Data www.ets-lindgren.
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ANTENNA PATTERN: 3160-09 AT 22.0 GHZ H-PLANE: 3160-09 E-PLANE: 3160-09 www.ets-lindgren.
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3160-10 VSWR: 3160-10 GAIN / ANTENNA FACTOR: 3160-10 88 Model 3160 Series Data www.ets-lindgren.
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HALF-POWER BEAMWIDTH: 3160-10 www.ets-lindgren.
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ANTENNA PATTERN: 3160-10 AT 33.0 GHZ H-PLANE: 3160-10 E-PLANE: 3160-10 90 Model 3160 Series Data www.ets-lindgren.