Antenna Patterns

0123-EX-PL-2005 Images

General Dynamics SATCOM Technologies, Inc.

2005-04-27ELS_70449

Fig 1: Recommendations FCC Recommendation 00% of the side lobes are allowed to exceed from 1° to 7°. 10% of the side lobes are allowed to exceed by a maximum of 3 dB, from 7° to 180°. G(υ) = 29-25 log(υ) dBi, for 1.25° [ υ [ 7.0° G(υ) = 8.0 dBi, for 7.0° [ υ [ 9.2° G(υ) = 32-25 log(υ) dBi, for 9.2° [ υ [ 48° G(υ) = -10 dBi, for 48° [ υ [ 180° ITU Recommendation 10% of the side lobes are allowed to exceed the curve. G(υ) = 29-25 log(υ) dBi, for Max(1, 100λ/D) [ υ [ 20° G(υ) = -3.5 dBi, for 20° [ υ [ 26.3° G(υ) = 32-25 log(υ) dBi, for 26.3° [ υ [ 48° G(υ) = -10 dBi, for 48° [ υ [ 180° MIL STD 188-164A Recommendation 10% of the side lobe are allowed to exceed the curve. For D/λ > 50 G(υ) = 29-25 log(υ) dBi, for Max(1, 100λ/D) [ υ [ 20° G(υ) = -3.5 dBi, for 20° [ υ [ 26.3° G(υ) = 32-25 log(υ) dBi, for 26.3° [ υ [ 48° G(υ) = -10 dBi, for 48° [ υ [ 180° For D/λ < 50 G(υ) = 32-25 log(υ) dBi, for Max(1, 100λ/D) [ υ [ 48° G(υ) = -10 dBi, for 48° [ υ [ 180°

Fig 2: 14.00 GHz Patterns. First Test - With Radome Azimuth ±20° Cut. Azimuth ±180° Cut. (9% over curve) Antenna Pattern. Copol Antenna Pattern. Copol 0 MIL 188-164A 0 MIL 188-164A -5 ITU -5 ITU FCC FCC -10 -10 -15 -15 -20 POWER, dB -20 POWER, dB -25 -25 -30 -30 -35 -40 -35 -45 -40 -50 -45 -55 -50 -60 -20 -16 -12 -8 -4 0 4 8 12 16 20 -160 -120 -80 -40 0 40 80 120 160 ANGLE, deg ANGLE, deg Elevation ±20° Cut Elevation ±180° Cut. (18% over curve) Antenna Pattern. Copol Antenna Pattern. Copol 0 MIL 188-164A 0 MIL 188-164A ITU -5 ITU -5 FCC FCC -10 -10 -15 -15 -20 POWER, dB POWER, dB -20 -25 -25 -30 -30 -35 -40 -35 -45 -40 -50 -45 -55 -50 -60 -20 -16 -12 -8 -4 0 4 8 12 16 20 -160 -120 -80 -40 0 40 80 120 160 ANGLE, deg ANGLE, deg

Fig 3: 11.7 GHz Patterns. With Radome Azimuth ±20° Cut. Azimuth ±180° Cut. Antenna Pattern. Copol Antenna Pattern. Copol 0 MIL 188-164A 0 MIL 188-164A -5 ITU -5 ITU FCC FCC -10 -10 -15 -15 -20 POWER, dB POWER, dB -20 -25 -25 -30 -30 -35 -40 -35 -45 -40 -50 -45 -55 -50 -60 -20 -16 -12 -8 -4 0 4 8 12 16 20 -160 -120 -80 -40 0 40 80 120 160 ANGLE, deg ANGLE, deg Elevation ±20° Cut Elevation ±180° Cut. Antenna Pattern. Copol Antenna Pattern. Copol 0 MIL 188-164A 0 MIL 188-164A ITU -5 ITU -5 FCC FCC -10 -10 -15 -15 -20 POWER, dB POWER, dB -20 -25 -25 -30 -30 -35 -40 -35 -45 -40 -50 -45 -55 -50 -60 -20 -16 -12 -8 -4 0 4 8 12 16 20 -160 -120 -80 -40 0 40 80 120 160 ANGLE, deg ANGLE, deg


Document Created: 2005-04-26 14:20:11
Document Modified: 2005-04-26 14:20:11
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