Atec Narda-638-639 - Manual

Waveguide Horns
50 Years of
Excellence
435 MORELAND ROAD • HAUPPAUGE, NY 11788
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182
RF Switching
Products
Active
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dept26
Products
Passive
Components
2.60-40 GHz
Standard Gain Horns
·
Primary Standard of Antenna Gain
·
7 Models Cover from 2.60 GHz to 40 GHz
Specifications
FREQUENCY WAVEGUIDE INPUT VSWR WEIGHT
RANGE MODEL BAND* SIZE COVER FLANGE (Max) lbs. Kg
(GHz) EQUIVALENT
2.60-3.95 644 S WR-284 UG-584/U 1.15 6 2.8
3.95-5.85 643 C WR-187 UG-407/U 1.15 2.3 1.1
5.4-8.20 642 XN WR-137 UG-441/U 1.15 1.0 0.5
8.20-12.4 640 X WR-90 UG-135/U 1.15 0.5 0.23
12.4-18 639 KU WR-62 UG-419/U 1.15 0.2 0.1
18-26.5 638 K WR-42 UG-595/U 1.15 0.2 0.1
26.5-40 V637 V WR-28 UG-599/U 1.15 0.1 0.05
*For a complete listing of all band letters and codes in use, refer to
Band Designation Table on page 176.
Patterns for all models in this series conform to the following
description: Beam width in E and H plane varies from 23° at the
highest frequency to 34° at the lowest frequency. Side lobes in
the H plane are all more than 20 dB down. First side lobes in the
E plane are 13 dB down, second side lobes are 18 dB down and
all other E plane lobes are more than 20 dB down.
Gain at Mid Frequency; 16.5 dB (with reference to isotropic radiation)
variation is 1.5 dB over total band about the mid band value.
See Waveguide Flange Data on page 188.