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GPS450 - GPS/GNSS Signal Splitter

1x4, BNC, 1000 - 2000 MHz, 50 Ohm, Passive

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GPS Signal Splitter, 4 Way, BNC

DC pass 1 port, DC block 3 ports w 200 Ω load

  • GPS L1 - L5, GLONASS, Galileo splitter
  • Low Insertion Loss (0.4 dB avg)
  • High Port to Port Isolation (30 dB avg)
  • Excellent VSWR (1.10 : 1 avg)
  • 15 VDC & 75 mA max on DC block port
  • Tri Alloy BNC Female (Jack) 50 Ohm
4 Way Power Divider RF Input Ratings
Into Matched
Load VSWR's
In-Phase 180°
1.2 : 1 20 Watts 20 Watts
2.0 : 1 20 Watts   5 Watts
10 Watts 1 Watts
4 Way Power Combiner RF Input Ratings
Input Signals In-Phase 180°
Coherent 4 X 5 Watts 4 X 0.25 Watts
Non-Coherent 4 X 0.5 Watts
GPS Antenna Signal Splitter, 4 Way, BNC - Outline Drawing

Typically used for powering an active antenna thru pass
ports while splitting the GPS signal between receivers

Mechanical Specifications
Circuit Design ……… 
Passive Wilkinson; DC pass 1 port, DC block 3 ports
Connectors ……………  BNC Jack, 50 Ohm Coaxial
Body ……………………  Brass, Tri-Alloy Plate
Connector Pin …  Beryllium Copper, Gold Plate
Insulator ……………  PTFE, Virgin Electrical Grade
Housing …………………  Aluminum, Clear Chem Film
Operating Temp …  -65°C to +85°C
Weight ……………………  388 Grams
Insertion Loss
above 6.02 dB
Isolation Input
1 - 2 GHz 0.6 dB max 0.3 dB max 3° max 22 dB min 1.30 : 1 max 1.20 : 1 max
4 Way GPS Antenna Splitter, BNC - Insertion Loss
Insertion Loss Test Sweep for Model GPS450 from INSTOCK Wireless.
4 Way GPS Antenna Splitter, BNC - Isolation
Isolation Test Sweep for Model GPS450 from INSTOCK Wireless.
4 Way GPS Antenna Splitter, BNC - VSWR
Input Return Loss Test Sweep for Model GPS450 from INSTOCK Wireless. Output Return Loss Test Sweep for Model GPS450 from INSTOCK Wireless.

Input Return Loss

Output Return Loss

GPS450 - 4 Way, BNC, GPS Antenna Signal Splitter Test Data

GPS450 - Features & Benefits


GPS450 is a four way, passive, GPS signal splitter ideal for splitting a GPS antenna signal between four receivers while providing a DC current path to power a remotely located active GPS antenna from one receiver while blocking the DC path from the others. Furnished with BNC female connectors all ports. A special feature is the 200 ohm internal load that provides a current drain for the GPS receivers not powering the antenna while maintaining optimum 50 ohm impedance match at all ports. Some GPS receivers will incorrectly sense an antenna fault when there is no current draw (due to the DC block). The 200 ohm internal load provides a simulated antenna current drain which prevents receiver faulting. Max voltage rating at the DC blocked port is 15 VDC; maximum current rating is 75 mA. Max voltage rating at the DC pass port is 50 VDC; max current rating is 2000 mA.


The heart of the unit is a precision designed and etched Wilkinson type microstrip circuit on a low loss, high frequency, dielectric substrate. Electrical performance is highlighted by 0.6 dB max insertion loss (above the 6.02 dB power split), 22 dB min isolation, 1.30:1 max input VSWR and 1.20:1 max output port VSWR. Equal power split and symmetry is displayed by 0.3 dB amplitude balance and 3 degrees phase balance. Narrow band RF performance over your frequency range may be even better. See 4 way GPS splitter test sweeps for details. DC block and 200 ohm internal load are specially designed to be RF transparent with negligible effect on performance.


Mechanical features include precision CNC, brass, 50 ohm BNC female coaxial connectors with tri alloy plating to insure tarnish resistance and low PIM operation. Connector pins are gold plated beryllium copper for reliability and lowcontact resistance.

Virgin electrical grade PTFE support insulators captivate the contact pins enabling trouble free coaxial connector mating. Long term operation and superior shielding is assured by the rugged CNC machined aluminum housing with clear chemical film finish. Secure mounting is provided by two 0.125" dia (3.18 mm) through holes. RoHS construction includes no-lead solder and a finish free of hexavalent chromium.


Housing dimensions are 3.98" wide by 2.98" deep by 0.88" high (101.1 x 75.7 x 22.2 mm). The BNC female (jack) connectors extend 0.61" (15.5 mm) from the housing. Operating temperature range is from -65°C to +85°C. Weight is 388 grams. See 4 way GPS signal splitter outline drawing for more information.


Model GPS450 is a 4-way, passive, BNC, GNSS splitter covering all frequencies from 1000 to 2000 MHz with best-in-class performance for GPS L1, L2, L3, L4, L5, GLONASS and Galileo global navigation satellite positioning system applications, and is deployed worldwide.

Options / Additional Models

TNC-Jack: A standard TNC version of this four way power splitter combiner is available passing DC current through all ports. PD2940

GPS TNC: An TNC version of this four way GPS splitter in the same GPS/GNSS configuration; DC Block 3 ports with 200 ohm internal load. GPS420

DC Blocking TNC: A DC-block TNC version of this four way power divider combiner is available passing DC current through one port and blocking it to the others. All ports pass RF and 10 MHz reference signal. PD5940

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