ORBIT FR Monocones User Manual
REFERENCE ANTENNAS
>
Monocones
REFERENCE ANTENNAS
> Main use:
• Wideband gain reference
• Particularly suited for automotive test ranges
> Delivered documents:
• Typical performance data (TYMEDATM)
• Measured return loss data
> Surface treatment:
• Alodine 1200 according to MIL-C 5541E class 3
• Blue paint
> Included equipment:
• Ground plane GP 100 or GP 400
> Optional equipment:
• Ground plane GP 40 or GP 60
> Related services:
• Calibration and maintenance
• Customization
➊ TECHNICAL PERFORMANCE
• Low loss and high effi ciency
• Azimuth pattern symmetry
• Wide bandwidth
➋ DESIGN
• Antennas mounted on a circular ground plane,
fi tted with a standard SATIMO fl ange
• The circular ground plane is made of a lightweight
aluminum foam composite for high structural
strength, low weight and easy handling
➌ REPEATABILITY
• Stiff and robust mechanical design
• Precision machined
• High reliability connector
> Measurement antennas
23
Electrical characteristics
Part number SMC 70 SMC 220 SMC 700 SMC 2200
Type of antenna Monocone Monocone Monocone Monocone
Frequency range 70 MHz – 220 MHz 220 – 700 MHz 700 – 2200 MHz 2200 – 6000 MHz
Gain variation over azimuth < ± 0.1 dB < ± 0.1 dB < ± 0.1 dB < ± 0.1 dB
VSWR <1.9 <1.9 <1.9 <1.9
Impedance 50 Ohms 50 Ohms 50 Ohms 50 Ohms
Effi ciency > 80% > 80% > 80% > 80%
Frequency BW (Ret. loss < -10 dB) 1:3 app 1:3 app 1:3 app 1:3 app
“A” = Total length “C” = Connector length
“B” = Antenna height “D” = Interface diameter
Mechanical characteristics
Monocone type Frequency range A mm B mm C mm D mm Connector Type Weight Recommended
(approx) ground plane
SMC 70 70 – 220 MHz 795.0 638.2 105.8 100 N Female
SMC 220 220 – 700 MHz 300.0 229.2 85.8 100 N Female
(1)
9 Kg GP 400
(1)
2.5 Kg GP 400
GP 100
(1)
SMC 700 700 – 2200 MHz 79.5 63.7 33.8 100 N Female
SMC 2200 2200 – 6000 MHz 30.0 22.9 33.8 100 N Female
(1) SPINNER ref # BN058739 and BN133670
(2) 1 m diameter
(3) 4 m diameter
(4) The Monocone antennas with ground planes are used for calibration in the frequency range 70-6000 MHz.
Mechanical drawing
SMC 700 Typical elevation pattern at 700 MHz
0.3 Kg GP 100
(1)
0.25 Kg GP 100
(4)
(2)
(2)
from 220 to 400 MHz
(3)
from 400 to 700 MHz
(3)
(3)
“A”
“B”“C”
24
SMC 700 Typical azimuth elevation pattern at 700 MHz
“D”
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