ORBIT FR Dual polarization feed antennas User Manual

MEASUREMENT PROBES

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Dual Polarization Feed Antennas

MEASUREMENT PROBES

> Main use:

• Illumination of anechoic chambers

• Compact Range feed

• Outdoor antenna and RCS measurements

• Near-fi eld probe

• Material measurements

> Delivered documents:

• Measured VSWR data

• Port-to-port isolation data

> Optional equipment:

• Mounting bracket

> Related services:

• Measured antenna pattern data, measured gain

• Maintenance and customization to specifi c range

geometries

➊ TECHNICAL PERFORMANCE

• Nearly circularly symmetric beam

• 40 dB minimum isolation between ports

• 10:1 bandwidth

• Nominally constant gain and beamwidth

➋ DESIGN

• Compact size for a low frequency antenna

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Electrical characteristics

Mechanical characteristics

Part number AL-2309-LF

Frequency range 200 MHz – 2000 MHz

Bandwidth ratio 10:1

Gain (nominal) 1.7 to 4.3 dBi

VSWR < 3:1 (< 2:1 typical)

3 dB Beamwidth E plane 70 to 75 degrees (0.4-2 GHz)

3 dB Beamwidth E plane < 120 degrees (0.2-0.4 GHz)

3 dB Beamwidth H plane 70 to 75 degrees (0.4-1.8 GHz)

Part number AL-2309-LF

Length (in) 13.3

Aperture size (in) 28.2 diameter

Aperture (sq feet) 4.3

Length with bracket (in) 26

Mounting plate size Circular mounting pattern 8 holes 8.3 mm
on 290 mm diameter

Weight (lb) 31.2

3 dB Beamwidth H plane < 85 degrees (0.2-0.4 GHz and 1.8-2.0 GHz)

Isolation (min) > 40 dB (port-to-port)

Connector SMA

Typical antenna gain Co & cross polarization E and H plane at 2 GHz

Co polar H plane
Co polar E plane
Cross polar H plane
Cross polar E plane

Co & cross polarization E and H plane at 200 MHz Typical 3 dB beamwidth

H’ plane-port 1
E’ plane-port 1
H’ plane-port 2
E’ plane-port 2

Co polar H plane
Co polar E plane
Cross polar H plane
Cross polar E plane

> Measurement antennas

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