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Emco BICONILOG 3141 User Manual

Log-periodic / t bow-tie antenna
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USER MANUAL
TM
EMCO MODEL 3141 BICONILOG
LOG-PERIODIC / T BOW-TIE ANTENNA
399236 Rev A
01/97

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Summary of Contents for Emco BICONILOG 3141

  • Page 1 Archived 3/18/10 USER MANUAL EMCO MODEL 3141 BICONILOG LOG-PERIODIC / T BOW-TIE ANTENNA 399236 Rev A 01/97...

  • Page 2: General Description

    Archived 3/18/10 GENERAL DESCRIPTION The EMCO Model 3141 is the latest evolution in the popular bow-tie/log periodic combination BiConiLog family. A biconilog antenna combines a broadband biconical- like bow-tie antenna with a standard log periodic to replace the traditional use of two antennas in the 30-1000 MHz EMC test frequencies.
  • Page 3 The antenna has a mounting bracket and 1/4x20 UNC knob for attaching to EMCO tripod and tower adaptors. Individual antenna factor calibration data is included with each antenna. The Model 3141 can be used with or without the end frames of the T bow-ties.
  • Page 4 Archived 3/18/10 APPLICATION Install the Model 3141 without the T bow-ties on an EMCO tripod or tower adaptor. Insert the bow-ties one at a time and tighten the base knobs. Attach each T end frame with four knobs. Connect an N-type coaxial cable from the antenna connector to a generator or receiver.
  • Page 5 V / m V / m Actual transmitted field strength should be verified using an EMCO Model 7100 series electric field probe or equivalent. 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 uniform field specification.

  • Page 6: Typical Data

    Archived 3/18/10 TYPICAL DATA Figure 1 shows typical 26-2000 MHz VSWR for the EMCO Model 3141. Figure 2 shows typical 3141 26-2000 MHz antenna factors. 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.
  • Page 7 Archived 3/18/10 1000 Figure 1. EMCO Model 3141 typical SWR. 10 m 1000 Figure 2. EMCO Model 3141 typical antenna factor.
  • Page 8 Archived 3/18/10 1000 1 V/m 3 V/m 10 V/m 3 V/m 80% AM Figure 3. EMCO Model 3141 typical 1 m forward power. 1000 1 V/m 3 V/m 10 V/m Figure 4. EMCO Model 3141 typical 3 m forward power.

  • Page 9: Specifications

    Archived 3/18/10 SPECIFICATIONS Electrical (nominal): Frequency range 26 - 2000 MHz 50 Ω Input impedance VSWR 2:1 average CW power 1 kW, above 60 MHz 500 W, below 60 MHz Symmetry +/- 0.5 dB Connector N female Mechanical: Height (T bow-tie) 75 cm Width (T bow-tie) 136 cm...

  • Page 10: Warranty

    Archived 3/18/10 WARRANTY EMC Test Systems warrants that our products are free from defects in materials and workmanship for a period of two years from the date of shipment. If you notify us of a defect within the warranty period, we will, at our option, either repair or replace those products which prove to be defective.

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