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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Medium gain corrugated feed horn aperture performance
Low gain
Part number Frequency Gain Directivity VSWR Taper Taper Nominal 3 dB
range (GHz) (dBi) (Typ) (dBi) (Typ) (dB)
(1)
(dB)
(2)
Beamwidth
AL 2310-0.75 SL 0.75 - 1.12 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-1.12 SL 1.12 - 1.70 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-1.70 SL 1.70 - 2.60 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-2.00 SL 2.00 - 3.00 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-2.60 SL 2.60 - 3.95 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-3.00 SL 3.00 - 4.50 9 10 1.6:1 0.3 0.9 55 - 66
AL 2310-3.95 SL 3.95 - 5.85 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-4.50 SL 4.50 - 6.70 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-5.85 SL 5.85 - 8.20 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-6.70 SL 6.70 - 10.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-8.20 SL 8.20 - 12.4 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-10.0 SL 10.0 - 15.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-12.4 SL 12.4 - 18.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-15.0 SL 15.0 - 22.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-18.0 SL 18.0 - 26.5 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-22.0 SL 22.0 - 33.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-26.5 SL 26.5 - 40.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-33.0 SL 33.0 - 50.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-40.0 SL 40.0 - 60.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-50.0 SL 50.0 - 75.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-60.0 SL 60.0 - 90.0 9 10 1.4:1 0.3 0.9 55 - 66
AL 2310-75.0 SL 75.0 - 110.0 9 10 1.4:1 0.3 0.9 55 - 66
(1) Cross-polarization applies to the conical angle of ± 8 deg, which illuminates the quiet zone of ORBIT/FR compact ranges.
(2) Cross-polarization applies to the conical angle of ± 16 deg.
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Low gain feed horn aperture performance
Mechanical characteristics*
Part number Aperture diameter Connector
AL 2309-0.75 SL 877 mm N
AL 2309-1.12 SL 586 mm SMA
AL 2309-1.70 SL 373 mm SMA
AL 2309-2.00 SL 328 mm SMA
AL 2309-2.60 SL 246 mm SMA
AL 2309-3.00 SL 219 mm SMA
AL 2309-3.95 SL 168 mm SMA
AL 2309-4.50 SL 147 mm SMA
AL 2309-5.85 SL 117 mm SMA
AL 2309-6.70 SL 99 mm SMA
AL 2309-8.20 SL 80 mm SMA
AL 2309-10.0 SL 66 mm SMA
AL 2309-12.4 SL 54 mm SMA
AL 2309-15.0 SL 45 mm SMA
AL 2309-18.0 SL 37 mm K
AL 2309-22.0 SL 30 mm K
AL 2309-26.5 SL 25 mm K
AL 2309-33.0 SL 20 mm 2.4
AL 2309-40.0 SL 15 mm WR 19
AL 2309-50.0 SL 13 mm WR 15
AL 2309-60.0 SL 10 mm WR 12
AL 2309-75.0 SL 9 mm WR 10
Mechanical characteristics
Part number Aperture diameter Connector
AL-2310-1.70-SL 359 mm SMA
AL-2310-2.60-SL 236 mm SMA
AL-2310-3.95-SL 157 mm N
AL-2310-5.85-SL 110 mm N
AL-2310-8.20-SL 75 mm SMA
AL-2310-12.4-SL 51 mm SMA
AL-2310-18.0-SL 35 mm K
AL-2310-26.5-SL 23 mm K
AL-2310-33.0-SL 19 mm 2.4
AL-2310-50.0-SL 12 mm WR 15
AL-2310-75.0-SL 8 mm WR 10
> Measurement antennas
* Typical characteristics for medium gain feed horns
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Full octave single linear feed horns
Electrical characteristics
Part number AL 2310-1 SL WB AL 2310-2 SL WB AL 2310-4 SL WB
Available frequencies 1 – 2 GHz 2 – 4 GHz 4 – 8 GHz
Average gain
Nominal 3dB Beamwidth 48-70° 48-70° 48-70°
Low gain full octave aperture performance
9 dBi 9 dBi 9 dBi
Mechanical characteristics
Part number AL 2310-1 SL WB AL 2310-2 SL WB AL 2310-4 SL WB
Connector SMA SMA SMA
Half octave dual linear feed horns
ORBIT/FR offers a full line of dual linear polarized feeds to enable convenient and more efficient range utilization.
An automatic high speed (PIN diode) or pre-test (electromechanical) switching between two ports is also
available (as an option). Theses feeds incorporate the corrugated aperture design needed to produce the
rotationally symmetric patterns optimized for reflector illumination. High levels of polarization isolation are
achieved due to specific orthomode design.
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Specifications for standard orbit/fr dual linear feeds are shown below
Electrical characteristics
Part number Frequency Gain Cross polarization
range (GHz) (dBi) (Typ) (dB) (Typ) (Typ) Beamdwidth
AL 2309-0.75 DL 0.75 - 1.12 12 37 1.5:1 ± 16 - 20°
AL 2309-1.12 DL 1.12 - 1.70 12 37 1.5:1 ± 16 - 20°
AL 2309-1.70 DL 1.70 - 2.60 12 37 1.5:1 ± 16 - 20°
AL 2309-2.60 DL 2.60 - 3.95 12 37 1.5:1 ± 16 - 20°
AL 2309-3.95 DL 3.95 - 5.85 12 37 1.5:1 ± 16 - 20°
AL 2309-5.85 DL 5.85 - 8.20 12 37 1.5:1 ± 16 - 20°
AL 2309-8.20 DL 8.20 - 12.4 12 37 1.5:1 ± 16 - 20°
AL 2309-12.40 DL 12.4 - 18 12 40 1.5:1 ± 16 - 20°
AL 2309-18.00 DL 18 - 26.5 12 40 1.5:1 ± 16 - 20°
AL 2309-26.50 DL 26.5 - 40 12 40 1.5:1 ± 16 - 20°
AL 2309-40.00 DL 40 - 60 12 40 1.5:1 ± 16 - 20°
(1)
VSWR Nominal 3 dB
Mechanical characteristics
Part number Aperture diameter Connector
AL 2309-0.75 DL 877 N
AL 2309-1.12 DL 586 SMA
AL 2309-1.70 DL 373 SMA
AL 2309-2.60 DL 246 SMA
AL 2309-3.95 DL 164 SMA
AL 2309-5.85 DL 117 SMA
AL 2309-8.20 DL 80 SMA
AL 2309-12.40 DL 54 SMA
AL 2309-18.00 DL 37 K
AL 2309-26.50 DL 25 K
AL 2309-40.00 DL 15 WR 19
> Measurement antennas
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