ANT-1040 Spinning DF Antenna

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ANT-1040 Spinning DF Antenna

Overview

Our versatile, high-performance airborne DF Antenna covers the 0.5 to 40 GHz frequency range and provides high gain and narrow beamwidth coverage for direction finding and signal isolation. The antenna modes of operation include point, sector scan and continuous spin mode, with spin rates from 0 to 200 RPM.

The antennas in the spinning DF segment include a Log periodic antenna covering the 0.5 to 2 GHz band, a 2 to 18 GHz parabolic antenna with Log periodic feed and an 18 to 40 GHz horn antenna. All three antennas are 45 degree slant linear polarized to provide the best overall characteristics for vertical and horizontally polarized signals. The antenna has RF bandpass filtering and RF limiters to protect low noise amplifiers. The three RF outputs are combined using a multiplexer so that the full 0.5 to 40 GHz RF band is provided at the output of the rotary joint.

Spinning DF Antenna (0.33Mb PDF)

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Key Features & Benefits

0.5 to 40 GHz DF in 3 bands
High gain, narrow beamwidth
RF filtering and RF limiters
Low noise preamplifiers
No RF band switching
Point, sector scan and spin modes
0 – 200 RPM spin rate

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Option 1	OMNI antennas (0.5 - 8 and 8 - 40 GHz bands)
Option 2	Selectable vertical/horizontal polarization (2 – 18 GHz). This option not recommended when using side lob inhibit function
Option 3	Programmable attenuators
Option 4	Alternate control interface (replaces fiber optic interface)

DF Spinning Antenna Frequency	0.5 - 2 GHz Low Band 2 – 18 GHz Middle Band 10-40 High Band
DF Spinning Antenna Polarization	0.5 - 2 GHz: 45º slant linear 2 - 18 GHz: 45º slant linear 18 – 40 GHz: 45º slant linear
DF Antenna Gain	Freq (GHz)	Min (dBi)	Typ Gain(dBi)
Log Periodic	0.5 - 2	4.0	6.5
Parabolic	2.0	8.0	10.5
	4.0	12.0	14.5
	8.0	13.0	16.0
	12.0	17.0	19.0
	18.0	19.0	21.0
Dual Ridge Horn	18.0	12.5.0	15.0
	26.0	12.5	15.0
DF Beamwidth	Freq (GHz)	Max (deg)	Typ Gain(deg)
Log Periodic	0.5 - 2	85.0	72.0
Parabolic	2.0	24.0	20.0
	4.0	12.0	10.5
	8.0	6.0	5.5
	12.0	4.0	3.3
	18.0	3.0	2.4
Dual Ridge Horn	18 - 40.0	30.0	18.0
Vertical – Horizontal Isolation	10 - 12 dB typ (2-18 GHz band)
Elevation Beamwidth	20º min (-5º to +15º)
Azimuth Squint	Freq (GHz)	Typ Gain(deg)
	0.5 - 2	±4.0
	2 - 12	±1.5
	12 - 18	±1.0
	18 40	±3.0
DF Antenna Modes	Spin, sector scan, point
Spin Rate/DF Search	0 to 200 RPM selectable
Scan Rate >30 Deg Sector	10 – 60 deg/sec
Scan Rate <30 Deg Sector	2 x sector width deg/sec

Size	19.5 in (50 cm) diameter x 25 in (63.5 cm) height
Weight (Spinning DF) Pedestal	50lbs (22.7 kg) max

48 VDC, 3.8 A (182 W)

Option 1	OMNI antennas (0.5 - 8 and 8 - 40 GHz bands)
Option 2	Selectable vertical/horizontal polarization (2 – 18 GHz). This option not recommended when using side lob inhibit function
Option 3	Programmable attenuators
Option 4	Alternate control interface (replaces fiber optic interface)

DF Spinning Antenna Frequency	0.5 - 2 GHz Low Band 2 – 18 GHz Middle Band 10-40 High Band
DF Spinning Antenna Polarization	0.5 - 2 GHz: 45º slant linear 2 - 18 GHz: 45º slant linear 18 – 40 GHz: 45º slant linear
DF Antenna Gain	Freq (GHz)	Min (dBi)	Typ Gain(dBi)
Log Periodic	0.5 - 2	4.0	6.5
Parabolic	2.0	8.0	10.5
	4.0	12.0	14.5
	8.0	13.0	16.0
	12.0	17.0	19.0
	18.0	19.0	21.0
Dual Ridge Horn	18.0	12.5.0	15.0
	26.0	12.5	15.0
DF Beamwidth	Freq (GHz)	Max (deg)	Typ Gain(deg)
Log Periodic	0.5 - 2	85.0	72.0
Parabolic	2.0	24.0	20.0
	4.0	12.0	10.5
	8.0	6.0	5.5
	12.0	4.0	3.3
	18.0	3.0	2.4
Dual Ridge Horn	18 - 40.0	30.0	18.0
Vertical – Horizontal Isolation	10 - 12 dB typ (2-18 GHz band)
Elevation Beamwidth	20º min (-5º to +15º)
Azimuth Squint	Freq (GHz)	Typ Gain(deg)
	0.5 - 2	±4.0
	2 - 12	±1.5
	12 - 18	±1.0
	18 40	±3.0
DF Antenna Modes	Spin, sector scan, point
Spin Rate/DF Search	0 to 200 RPM selectable
Scan Rate >30 Deg Sector	10 – 60 deg/sec
Scan Rate <30 Deg Sector	2 x sector width deg/sec

Size	19.5 in (50 cm) diameter x 25 in (63.5 cm) height
Weight (Spinning DF) Pedestal	50lbs (22.7 kg) max

48 VDC, 3.8 A (182 W)

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