ORBIT FR Compact Range feed horns User Manual

MEASUREMENT PROBES

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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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