Specification

Technical Data Sheet: Antennas Direct 91XG Antenna
Physical Data:
Dimensions: Length = 93 in. Width = 20 in. Height = 22 in.
Weight: 6.5 lbs
Turning Radius: 52 in.
Electrical Data:
Band: UHF 470 MHz to 806 MHz Channels 14 - 69
Impedance: 75 ohm
Connector: F-Female
Performance Data:
Peak Gain: 18.28 dBi @ 765 MHz
VSWR: Max 3.0 470 MHz to 806 MHz
Table 1: 91XG - Computed Performance Data for USA UHF DTV Band
Notes:
1. Unless stated otherwise, all performance data computed using Remcom, Inc. X-FDTD 7.0 simulator.
2. Assumptions: PEC, free space, no balun. 300 Ohm transmission line reference.
3. Gain is specified dBi (isotropic) per IEEE definition. Balun and mismatch losses not included.
4. There are two common meanings for Front-to-Back Ratio (F/B). One specifies ratio as measured 180 degrees opposite boresight. The other, used by IEEE
specifies the ratio of boresight gain to maximum gain in rear hemisphere. The IEEE definition is the most conservative. IEEE F/B values shown here are
computed based on azimuth and elevation cuts provided in this document.
Copyright (c) Antennas Direct, Inc., 2009. Page 1 of 5
470 11.81 42 51 22.57 20.3
546 13.68 36 43 30.05 24.57
622 15.57 30 35 41.95 24.44
698 17.44 24 28 31.53 23.48
Frequency
(MHz)
Boresight Gain
(dBi)
Azimuth Half-
Power Beam
Width (deg)
Elevation Half-
Power Beam
Width (deg)
Front-to-Back Ratio
(dB) @ 180 deg
IEEE F/B Rear
Hemisphere (dB)