Archived 01/19/11 Model 3142C BiConiLog™ Antenna User Manual
Archived 01/19/11 ETS-Lindgren L.P. reserves the right to make changes to any products herein to improve functioning or design. Although the information in this document has been carefully reviewed and is believed to be reliable, ETS-Lindgren does not assume any liability arising out of the application or use of any product or circuit described herein; nor does it convey any license under its patent rights nor the rights of others. All trademarks are the property of their respective owners.
Archived 01/19/11 Table of Contents Safety Symbol Definitions................................................................................................................. v General Safety Considerations......................................................................................................... v 1.0 Introduction ................................................................................................................................ 7 2.0 Receiving Your Order .........................
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Archived 01/19/11 Safety Symbol Definitions This product and related documentation must be reviewed for familiarization with safety markings and instructions prior to operation of the product. Safety Symbol ! OR Definition REFER TO MANUAL—When the product is marked with this symbol refer to the instruction manual for additional information. If the instruction manual has been misplaced, go to www.ets-lindgren.com for downloadable files or contact ETS-Lindgren customer service.
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Archived 01/19/11 1.0 Introduction The ETS-Lindgren Model 3142C BiConiLog™ Antenna is designed as a dualpurpose antenna that can be used for both emissions and immunity applications. The Model 3142C is a hybrid linearly polarized EMC antenna consisting of a log-periodic dipole array (LPDA) and a single bow-tie antenna.
Archived 01/19/11 With the end plates attached to the Model 3142C bow-tie elements, the equivalent dipole electrical length is increased, which decreases resonant frequency and increases efficiency in the 20 to 60 MHz range. Similarly, the regular bow-tie has a lower resonant frequency than an 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.
Archived 01/19/11 2.0 Receiving Your Order 2.1 Unpacking and Acceptance Step 1. Upon delivery of your order, inspect the shipping container(s) for evidence of damage. Record any damage on the delivery receipt before signing it. In case of concealed damage or loss, retain the packing materials for inspection by the carrier. Step 2. Remove the product from its shipping container(s). Save the container(s) and any protective packing materials for future use. Step 3.
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Archived 01/19/11 3.0 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. For more information about our calibration services, visit our website at http://www.ETS-Lindgren.com.
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Archived 01/19/11 4.0 Mounting Instructions 4.1 Model 3142C Components The Model 3142C BiConiLog™ Antenna consists of the following: • (1) Antenna • (2) Bow-tie elements • (2) 10-32 thread knobs to attach bow-tie elements • (2) Protective end caps for bow-tie elements • (8) Screws to attach protective end caps to bow-tie elements The optional end plate package consists of: • (2) T bow-tie endplates • (8) Thumbscrew knobs to attach endplates to bow-tie elements 4.2 Mount the Bow-tie Elements 1.
Archived 01/19/11 3. Insert one of the 10-32 thread knobs into the opposite side of the boom from where you inserted the bow-tie. Slowly tighten the knob, taking care not to cross-thread the connection. Cross-threading the connection could cause permanent damage to the bow-tie element. 4. Repeat steps 2 and 3 for the second bow-tie element. 4.3 Connect the Optional End Plates to Create the T Bow-ties 1. For protection, there is a black end cap on each of the bow-tie elements.
Archived 01/19/11 Contact with any metal or non-metallic structure can capacitively load the antenna, which may cause unrepeatable results. Therefore, make sure that no part of the dipole elements or bow-ties is in contact with the tripod or tower, particularly in vertically-polarized tests. Where possible, run the feed cable straight one meter or more back from the Model 3142C before dropping vertically.
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Archived 01/19/11 5.0 Application 5.
Archived 01/19/11 For IEC 1000-4-3 type testing, the antenna tip can be placed at any distance between one and three meters from the EUT as long as the front face plane is illuminated according to the –0,+6 dB specification. 5.2 With Optional End Plates For emissions testing it is recommended that the Model 3142C be used without the optional end plates. The coupling of the endplates to ground will create higher uncertainty values, particularly in the vertical polarization.
Archived 01/19/11 6.0 Typical Data Without Optional End Plates 6.1 Model 3142C Typical 26-3000 MHz VSWR VSWR 100 10 1 20 100 1000 3000 Frequency (MHZ) 6.2 Model 3142C Typical 26-3000 MHz Antenna Factor Distance for the ANSI 3 and 10 meter calibrations is measured from the antenna midpoint, and for SAE 1 meter calibrations the distance is measured from the antenna tip. Midpoint is defined as half the distance between the small elements and the bow-ties, which is about 45 cm from the small end tip.
Archived 01/19/11 6.3 Model 3142C Typical 26-3000 MHz Gain This data is derived from the 3 antenna method antenna factors.
Archived 01/19/11 7.0 Typical Data with Optional End Plates The power shown was measured over a ground plane with 1.5 meters transmit antenna and probe height, horizontal polarization. Horizontal polarization is the worst-case power required; typically less power is required for vertical polarization. In practice, many users place ferrite tiles on the ground between the antenna and probe to reduce reflected-ray interference. For any other field strength E, multiply the power in watts for 1 V/m by E2. 7.
Archived 01/19/11 7.2 Model 3142C Typical 26-3000 MHz Antenna Factor Distance for the ANSI 3 meter and 10 meter calibrations is measured from the antenna midpoint, and for SAE 1 meter calibrations the distance is measured from the antenna tip. Midpoint is defined as half the distance between the small elements and the bow-ties, which is about 45 cm from the small end tip.
Archived 01/19/11 7.3 Model 3142C Typical 26-3000 MHz 1M Forward Power The following illustrates the typical 26-3000 MHz forward power required for 1, 3, and 10 V/m at 1 meter from the tip of the antenna. 1000 1 V/m 80% AM 3 V/m 80% AM 10 V/m 80% AM 100 Watts 10 1 0.1 0.
Archived 01/19/11 7.4 Model 3142C Typical 26-3000 MHz 3M Forward Power The following illustrates the typical 26-3000 MHz forward power required for 1, 3, and 10 V/m at 3 meters from the antenna tip. 1 V/m 80% AM 3 V/m 80% AM 10 V/m 80% AM 1000 100 Watts 10 1 0.1 0.
Archived 01/19/11 8.0 Specifications 8.1 Electrical Specifications With Standard Bow-tie Elements With Optional End Plates Frequency Range: 26-3000 MHz 26-3000 MHz Input Impedance 50 Ω 50 Ω VSWR: 2:1 average 2:1 average CW power: 26 MHz – 60 MHz500 W60 MHz – 600 MHz1kW600 MHz – 1GHz750W1 GHz – 3 GHz500 W 26 MHz – 60 MHz500 W60 MHz – 600 MHz1kW600 MHz – 1GHz750W1 GHz – 3 GHz500 W Symmetry: +/- 0.5 dB +/- 0.5 dB Connector: N female N female 8.
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Archived 01/19/11 9.0 Warranty Policy for Standard EMCO Brand Products 9.1 Scope and Duration of Warranties Seller warrants to Buyer that the Standard EMCO Brand Products Excluding 5211 & 5220 be (1) free from defects in material, manufacturing workmanship, and title, and (2) conform to the Seller’s applicable product descriptions and specifications, if any, contained in or attached to Seller’s quotation.
Archived 01/19/11 OTHERWISE, WHETHER OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE OR USE OR OTHERWISE ON THE PRODUCTS, OR ON ANY PARTS OR LABOR FURNISHED DURING THE SALE, DELIVERY OR SERVICING OF THE PRODUCTS. THERE ARE NO WARRANTIES WHICH EXTEND BEYOND THE DESCRIPTION ON THE FACE HEREOF.
Archived 01/19/11 The remedies set forth herein are conditioned upon Buyer promptly notifying Seller within the applicable warranty period of any defect or nonconformance and making the product available for correction.
