Antennas
Low Band, Aviation, and VHF Antennas
ST221 Series
ST221-SF1SNF(FXXXX)
Also referred as: EXCAL221NF-XXXX
Mobile omni, 0 dBd, 2.5 MHz B.W., N-Female, 138-163 MHz
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Low profile for a wide range of mobile applications
Cast aluminum
2.5 MHz Bandwidth
Applications include: trains, taxis, police cars, emergency vehicles, buses and trucks
A minimum 62" x 42" ground plane is required.
Sinclair's Excaliber ST221 series of antennas are low profile antennas designed for a
wide range of mobile applications. Their design renders them relatively
inconspicuous and resistant to damage. They have become a North American
standard antenna for railroad locomotive service.
www.sinctech.com
A minimum 62" x 42" ground plane is required.
Region
Telephone
E-mail
United States
Europe, Middle East and Africa
Caribbean and Latin America
USA: 1 800 263 3275
International: +44 (0) 1487 84 28 19
International: +1 905 726 7676
salesusa@sinctech.com
salesuk@sinctech.com
salesla@sinctech.com
ST221-SF1SNF(FXXXX)
Issue: 3
Product Specification Sheet
EPR 018350
Customer Tech Manual 005112
Sinclair’s commitment to product leadership may result in improvement or change to this product
Copyright © Sinclair Technologies
Canada and rest of the world
Canada: 1 800 263 3275
International: +1 905 727 0165
salescan@sinctech.com
Dated: 14-12-16
Dated: 25-01-16
Page 1/2
Antennas
Low Band, Aviation, and VHF Antennas
ST221 Series
Electrical Specifications
Frequency Range
Bandwidth
Connector
Gain (nominal)
Input VSWR (max)
Polarization
Impedance
Pattern
Average Power Input (max)
Lightning protection
Mechanical Specifications
Width
Depth
Length/ Height
Actual shipping weight
Shipping dimensions
Ground Plane (min)
Mounting hardware
dBd (dBi)
Ω
W
138 to 163
2.5
N-Female
unity (2.1)
1.5:1
vertical
50
Omni-directional
300
DC ground
in (mm)
in (mm)
in (mm)
lbs (kg)
in (mm)
in (mm)
2.2 (56)
24.5 (622)
4 (102)
6 (2.72)
3x5x25 (76x127x635)
62x42
Supplied
°F (°C)
-40 to +140 (-40 to +60)
Ordering Information
Specify exact frequency at time of order. For frequency
160.8 MHz, please use model number ST221SF1SNF(F1610). The part number should be to the nearest
0.5 MHz.
UHF-Female connector also available.
www.sinctech.com
Environmental Specifications
Temperature range
MHz
MHz
Region
Telephone
E-mail
United States
Europe, Middle East and Africa
Caribbean and Latin America
USA: 1 800 263 3275
International: +44 (0) 1487 84 28 19
International: +1 905 726 7676
salesusa@sinctech.com
salesuk@sinctech.com
salesla@sinctech.com
ST221-SF1SNF(FXXXX)
Issue: 3
Product Specification Sheet
EPR 018350
Customer Tech Manual 005112
Sinclair’s commitment to product leadership may result in improvement or change to this product
Copyright © Sinclair Technologies
Canada and rest of the world
Canada: 1 800 263 3275
International: +1 905 727 0165
salescan@sinctech.com
Dated: 14-12-16
Dated: 25-01-16
Page 2/2
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