ETS-Lindgren 3126 Precision Sleeve Dipole - Manual (Page 7)

7 Introduction www.ets-lindgren.com
1.0 Introduction
The ETS-Lindgren Model 3126
Series Sleeve Dipole is designed as
precision gain references for antenna
range calibration and to meet the
Cellular Telecommunication and
Internet Association (CTIA) ±0.1 dB
symmetry requirement for ripple test
measurements.
These antennas are truly
omni-directional, having an electric
dipole pattern approaching that of a
half-wave resonant dipole with typical
gains between 1.5 dB and 2.0 dB.
Model 3126-2450
The sleeve dipole design allows the antenna to be end-fed to avoid cable and
feed-point interactions that interfere with the performance of the antenna. Integral
quarter-wave chokes and/or ferrite loading (depending on frequency range) also
helps to reduce cable interaction. This design also provides exceptional
symmetry (better than ±0.1 dB, 0.2 dB peak-to-null) to meet or exceed CTIA
criteria for ripple test antennas.