ORBIT FR Compact Range feed horns User Manual
MEASUREMENT PROBES
>
Compact Range Feed Horns
AL-2309-2.6-SL shown with optional absorber plate
AL 2309-2.60 DL
➊ TECHNICAL PERFORMANCE
• Rotationally symmetric radiation pattern
• Low cross polarization
• Stable amplitude taper with frequency
• Optimized reflector edge and chamber
wall illumination
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MEASUREMENT PROBES
> Main use:
• Illumination of compact range reflectors
• Direct range illumination or field probing
• Illumination of communication reflector antennas
> Delivered documents:
• Measured VSWR
Measured radiation pattern main cuts
•
(0°, 45°, 90° and 135°)
> Surface treatment:
• Anodized
> Related services:
• Calibration, maintenance, customization
(i.e. high gain half octave, dual linear low gain full
octave, dual linear medium gain…)
➋ DESIGN
• High precision mechanical mounting
• Corrugated aperture
Which CR feed horn do you need?
Suited for Main characteristics
Low Gain Compact range with Lower amplitude
short focal length taper, lower weight,
options for full
octave bandwidth,
higher reflector
edge and wall
illumination, higher
cross-polarization
Medium Gain Standard focal Best overall
length ORBIT/FR performance,
reflectors compliant to the
compact range
catalogue specifications
High Gain Measurement applications Higher amplitude taper,
for antennas smaller lower reflector edge
than the specified quiet and wall illumination,
zone size that require reduced quiet zone size
high accuracy low
sidelobe measurements
Mechanical drawing
• Alignment pin for accurate and repeatable
mounting.
• Spirit level for repeatable polarization
reference.
Medium gain
Medium gain feed horns with
dual polarization for more
efficient range utilization
are available upon request.
Half octave single linear feed horns
The medium gain corrugated horn is the first choice
for general purpose compact ranges. It offers the
best overall performance in regard to amplitude taper,
cross polarization performance, reflector edge illumination, chamber wall illumination, and feed leakage
into the quiet zone.
The low gain corrugated feed horns offer lower
amplitude taper (typically 0.3 dB over the full quiet
zone versus 0.8 dB for the medium gain horns)
at the cost of slightly degraded quiet zone ripple
and cross-polarization performance. It is also frequently used on compact range systems with
shorter focal lengths, which require an illumination
cone angle of ± 16 deg. Other advantages of the low
gain feeds are lower weight and the availability of a full
octave frequency bandwidth up to 8 GHz.
Part number Frequency Gain Directivity VSWR Taper Cross Nominal 3 dB
range (GHz) (dBi) (Typ) (dBi) (Typ) (dB)
AL 2309-0.75 SL 0.75 - 1.12 13 14 1.6:1 0.8 35° 34 - 40°
AL 2309-1.12 SL 1.12 - 1.70 13 14 1.6:1 0.8 35° 34 - 40°
AL 2309-1.70 SL 1.70 - 2.60 13 14 1.6:1 0.8 37° 34 - 40°
AL 2309-2.00 SL 2.00 - 3.00 13 14 1.6:1 0.8 37° 34 - 40°
AL 2309-2.60 SL 2.60 - 3.95 13 14 1.6:1 0.8 37° 34 - 40°
AL 2309-3.00 SL 3.00 - 4.50 13 14 1.6:1 0.8 37° 34 - 40°
AL 2309-3.95 SL 3.95 - 5.85 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-4.50 SL 4.50 - 6.70 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-5.85 SL 5.85 - 8.20 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-6.70 SL 6.70 - 10.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-8.20 SL 8.20 - 12.4 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-10.0 SL 10.0 - 15.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-12.4 SL 12.4 - 18.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-15.0 SL 15.0 - 22.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-18.0 SL 18.0 - 26.5 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-22.0 SL 22.0 - 33.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-26.5 SL 26.5 - 40.0 13 14 1.4:1 0.8 40° 34 - 40°
AL 2309-33.0 SL 33.0 - 50.0 13 14 1.4:1 0.8 37° 34 - 40°
AL 2309-40.0 SL 40.0 - 60.0 13 14 1.4:1 0.8 35° 34 - 40°
AL 2309-50.0 SL 50.0 - 75.0 13 14 1.4:1 0.8 35° 34 - 40°
AL 2309-60.0 SL 60.0 - 90.0 13 14 1.4:1 0.8 35° 34 - 40°
AL 2309-75.0 SL 75.0 - 110.0 13 14 1.4:1 0.8 35° 34 - 40°
(1) Cross-polarization applies to the conical angle of +- 8 deg, which illuminates the quiet zone of ORBIT/FR compact ranges.
(1)
polarization
(1)
(Typ) Beamwidth
> Measurement antennas
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