Model 3127 Resonant Loop Antenna User Manual

PublishTime：2024-12-12

●ETS-Lindgren Model 3127 Resonant Loop Antennas are magnetic dipole antennas designed to meet the Cellular Telecommunication and Internet Association’s (CTIA) +/- 0.1 dB symmetry requirement for ripple test measurements at the labeled center frequency. These omni-directional antennas have a magnetic dipole pattern approaching that of a half wave resonant electric dipole. The pattern produced has the same peak and null orientation as that of a sleeve dipole oriented along the same axis, but with the directions of the electric and magnetic fields reversed. That is, the electric field vector along the azimuth is perpendicular to the axis and the magnetic field vector is parallel to the axis.
●The loop design allows the antenna to be end-fed to avoid cable and feed-point interactions that interfere with the symmetry of the antenna. Integral quarter-wave chokes and/or ferrite loading (depending on frequency range) also help to reduce cable interaction. This design also provides exceptional symmetry to meet the CTIA criteria for ripple test antennas.
●All Model 3127 antennas are designed with better than +/- 0.1 dB symmetry (0.2 dB peak-to-null) in at least a +/- 5 MHz band around the labeled center frequency. For reference purposes, gain and symmetry values are provided for a 10 MHz band, depending on model, centered about the labeled frequency. The loops have nominal 50 ohm impedance, a maximum continuous transmit power of one watt, and are equipped with a female SMA connector.
●The loops are calibrated using an A2LA accredited process with a typical measurement uncertainty on the order of +/- 1.0 dB at the center frequency. During the calibration process, the dipoles are also certified to meet ± 0.1 dB symmetry required for use in the ripple test specified in the CTIA’s Over-The-Air Performance Test Plan, in a +/- 5 MHz band around the labeled center frequency. Maximum ripple, VSWR, and approximate gain values are provided with each calibration. Note that the gain values provided with this calibration are for diagnostic reference purposes only. For accurate gain values to perform range calibration, the Model 3126 Precision Reference Sleeve Dipoles are recommended. Individual calibration data is included with each dipole. Gain value is not provided with the 3127-3600 and 3127-5500 Loops. Any gain data provided for any 3127 loop is for reference only.
●The Model 3127 antenna family covers a range of frequencies intended for characterization of wireless chambers including, but not limited to, the following models
●The digits following the hyphen in the model name note the center frequency of the antenna. For example, Model 3127 450 has a center frequency of 450 MHz. This manual applies to the frequencies listed, as well as any custom frequencies.

Brand of Product：	ETS-Lindgren
Part#：	Model 3127 、 3127 、 3127-450 、 3127-1575 、 3127-2132 、 3127-617 、 3127-1732 、 3127-2140 、 3127-700 、 3127-1747 、 3127-2450 、 3127-722 、 3127-1768 、 3127-2535 、 3127-836 、 3127-1800 、 3127-2655 、 3127-880 、 3127-1868 、 3127-3600 、 3127-897 、 3127-1880 、 3127-5500 、 3127-920 、 3127-1950 、 3127-XXXX 、 3127-3700 More Part#
Product Category：	Resonant Loop Antenna More
Application：	More
Data Type：	User's Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	April, 2020
Version Number：	Rev E
Data Encoding：
Data Size：	1.2 MB

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