Archived 09/23/10 Model 3142B BiConiLog Antenna ™ MANUAL © EMC TEST SYSTEMS, L.P.
ArchivedIntroduction 09/23/10 MODEL 3142B BICONILOG™ ANTENNA EMC Test Systems, 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 EMC Test Systems, L.P. assuming any liability whatsoever arising out of the application or use of any product or circuit described herein. EMC Test Systems, L.P. does not convey any license under its patent rights or the rights of others.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Introduction Table of Contents INTRODUCTION ........................................................................................................................................ 1 ASSEMBLY & MOUNTING INSTRUCTIONS ....................................................................................... 4 APPLICATION WITHOUT THE OPTIONAL END PLATES ..............................................................
ArchivedIntroduction 09/23/10 MODEL 3142B BICONILOG™ ANTENNA © EMC TEST SYSTEMS, L.P.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Introduction INTRODUCTION The ETS-Lindgren EMCO brand Model 3142B BiConiLog™ Antenna is designed as a dual-purpose antenna that can be used for both emissions and immunity applications. The Model 3142B is a hybrid linearly polarized EMC antenna consisting of a log–periodic dipole array (LPDA) and a single bow-tie antenna.
ArchivedIntroduction 09/23/10 MODEL 3142B BICONILOG™ ANTENNA suspended horizontally back from the antenna at least 1 meter before any vertical drop. The antenna has a mounting bracket and 1/4X20 UNC knob for attaching to an ETS-Lindgren tripod or tower adapter. Individual antenna factors and gain calibration data is included with each antenna. The Model 3142B optional end plates (Part Number 106572) are available to improve gain for immunity testing.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Introduction equal length single-wire dipole. The T end plate option has its first resonance at a frequency where its length is about 0.22 λ, a regular bow-tie at a length of 0.3 λ, and a tuned dipole at about a length of 0.48 λ. Thus at 50 MHz the 1.4m long end plate option of the Model 3142B behaves like at 2.8 m tuned dipole.
ArchivedAssembly 09/23/10 & Mounting Instructions MODEL 3142B BICONILOG™ ANTENNA ASSEMBLY & MOUNTING INSTRUCTIONS The Model 3142B consists of the following: 1 ea. Antenna 2 ea. Bow-Tie Elements 2 ea. 1/4x20 Knobs for attaching Bow-Tie elements. 2 ea. Protective End Caps on the Bow-Tie elements. 8 ea. Screws to attach the Protective End Caps to the Bow-Tie elements. The Optional End Plate package consists of: 2 ea. T Bow-Tie Endplates 8 ea.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Assembly & Mounting Instructions Step 3. Connecting the optional end plates to create the T bow-ties. The Model 3142B has a black end cap on each of the bowtie elements to protect them. In order to utilize the optional end plates that create the T bow-ties, the black end caps must first be removed. Using a Phillips head screwdriver carefully remove the four Bow-tie element receptacle hole and optional end plate with screw knob.
ArchivedAssembly 09/23/10 & Mounting Instructions MODEL 3142B BICONILOG™ ANTENNA plates is mounted on a tower. Vertical polarization on a tripod requires special consideration. Since immunity power requirements are many dB lower for vertical polarization, the T end frames can be removed when mounting vertically on a standard tripod. A special tripod is available from ETS-Lindgren for vertical polarization with T bow-ties intact. Please contact ETS-Lindgren for the recommended mounting scheme.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Application Without the Optional End Plates APPLICATION WITHOUT THE OPTIONAL END PLATES For emissions measurements, electric fields strength in dB[V/m] is obtained from E(dB[V/m]) = V(dB[V]+AF(dB[1/m])+α(dB) where V is the receiver or spectrum analyzer voltage reading, AF is antenna factor (see attached calibration data), and α is cable loss, if cable losses are non-negligible.
ArchivedApplication 09/23/10 Without the Optional End Plates MODEL 3142B BICONILOG™ ANTENNA For IEC 1000-4-3 type testing, the antenna tip can be placed at any distance between 1 and 3 m from the EUT as long as the front face plane is illuminated according to the –0,+6 dB specification. 8 © EMC TEST SYSTEMS, L.P.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Application With The Optional T Bow-Tie End Plates APPLICATION WITH THE OPTIONAL T BOW-TIE END PLATES For emissions testing it is recommended that the Model 3142B be used without the optional end plates. The coupling of the endplates to ground will create higher uncertainty values, particularly in the vertical polarization.
ArchivedTypical 09/23/10 Data without the End Plates MODEL 3142B BICONILOG™ ANTENNA dB uniform field specification. In general, closer distances require less power to create a given field strength. TYPICAL DATA WITHOUT THE END PLATES Figure 1 shows typical 26-200 MHz VWSR for the Model 3142B. Figure 2 shows typical Model 3142B 26-2000 MHz antenna factors.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Typical Data without the End Plates VSWR 100 10 1 10 100 1,000 MHz Figure 1. Model 3142B Typical VSWR 35 30 dB[1/m] 25 20 15 1m 3m 10 m 10 5 0 200 400 600 800 1,000 1,200 1,400 1,600 1,800 2,000 MHz Figure 2. Model 3142B Typical Antenna Factor © EMC TEST SYSTEMS, L.P.
ArchivedTypical 09/23/10 Data without the End Plates MODEL 3142B BICONILOG™ ANTENNA 10 5 0 dBi -5 -10 -15 1m 3m 10 m -20 -25 -30 10 100 1,000 MHz Figure 3. Model 3142B Typical Gain 1,000 100 1m 3m W 10 1 0.1 0.01 0.001 10 100 1,000 MHz Figure 4. Model 3142B Typical 1 V/m Power Required 12 © EMC TEST SYSTEMS, L.P.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Typical Data with the End Plates TYPICAL DATA WITH THE END PLATES Figure 1 shows typical 26-2000 MHz VSWR for the Model 3142B with optional end plates. Figure 2 shows typical Model 3142B with optional end plates antenna factors from 26-2000 MHz. Distance for the ANSI 3 and 10 meter calibrations is measured from the antenna midpoint, while for SAE 1 meter calibrations the distance is measured from the antenna tip.
ArchivedTypical 09/23/10 Data with the End Plates MODEL 3142B BICONILOG™ ANTENNA SWR 100 10 1 10 100 1000 MHz Figure 1. Model 3142B typical VSWR. 35 AF dB[1/m] 30 1m 3m 10 m 25 20 15 10 5 10 100 1000 MHz Figure 2. Model 3142B typical antenna factor. 14 © EMC TEST SYSTEMS, L.P.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Typical Data with the End Plates 1000 1 V/m 3 V/m 10 V/m 3 V/m 80% AM W 100 10 1 0.1 20 30 40 50 60 70 80 MHz Figure 3. Model 3142B typical 1 m forward power. 1000 1 V/m 3 V/m 10 V/m W 100 10 1 0.1 20 30 40 50 60 70 80 MHz Figure 4. Model 3142B typical 3 m forward power. © EMC TEST SYSTEMS, L.P.
ArchivedSpecifications 09/23/10 MODEL 3142B BICONILOG™ ANTENNA SPECIFICATIONS ELECTRICAL 3142B With Standard Bow-tie Elements With Optional End Plates Frequency Range 26-2000 MHz 26-2000 MHz Input Impedance 50 ς 50 ς VSWR 2:1 average 2:1 average CW power 1 kW, above 100 MHz 300 W, below 100 MHz 1 kW, above 60 MHz 500 W, below 60 MHz Symmetry +/- 0.5 dB +/- 0.
ArchivedMODEL 09/23/10 3142B BICONILOG™ ANTENNA Maintenance MAINTENANCE To ensure reliable and repeatable long-term performance, annual recalibration of your antenna by ETS-Lindgren’s experienced technicians is recommended. Our staff can recalibrate almost any type or brand of antenna. Please call to receive a Service Order Number prior to sending an antenna to us for calibration.
ArchivedWarranty 09/23/10 Statement MODEL 3142B BICONILOG™ ANTENNA WARRANTY STATEMENT EMC Test Systems, L.P., hereinafter referred to as the Seller, warrants that standard EMCO products are free from defect in materials and workmanship for a period of two (2) years from date of shipment.
