• Product Description
  • Product Feature
  • Product Specification

Small size and ruggedness, demand of vehicle locating and marine navigation GPS/BDS antenna that will sustain harsh environment.

GA-38B is the integration of a high performance GPS/BDS patch antenna and a state-of-the-art low noise amplifier into a very low profile/ extremely compact/ fully waterproof enclosure which, when connected to a GPS/BDS receiver with 2.5~5.5V DC antenna power, provides excellent signal amplification and out-band filtering & rejection, provide 3V or 5V input Voltage is available.

  • High performance
  • Out-band filtering & rejection
  • Fully waterproof IPX8
  • Voltage: 2.5 V ~5.5 V DC
  • Provides excellent signal amplification
  • ESD Design & TVS Design ( optional )


  • Compact Construction/ Low Profile/Fully Waterproof
  • Magnet and Screw Mount Base
  • Excellent Temperature Stability
  • Low Noise Figure
  • High Sensitivity



  • Automobile GPS/BDS
  • Bluetooth Receiver
  • Car Tracking Navigation System
  • AVL / Fleet Management Systems
  • External Antenna for Handheld GPS
  • External Antenna for PDA Navigator
 Physical Condition
Constructions: ABS PA777D Shell / AB Glue for water seal in between
Dimensions: 40.5mm (L) x 38mm (W) x 12.3mm (H)
Weight: 50 grams (excluding cable & connector)
Color: Standard in Black
Mounting: Magnet mount with two magnets or 3M Double sided tape
Cable & Connector
RF cable: 5 meter RG174/U (standard) cable, other length available
Pulling strength: 6 Kg @ 5sec. molded plastic on connector end for strain relief.
SMA, SMB or SMC in straight or right angle
Antenna Element
Center Frequency: 1559~1575Mhz MHz
Polarization: R.H.C.P. (Right Handed Circular Polarization).
Bandwidth 10 MHz min. @S11£-10 dB, 24MHz typ. @S11<-8dB
Gain @ 10o Elevation: 2 dBi typical.
Axial Ratio: 3 dB max.
Output VSWR: 1.5 max
Output Impedance: 50 ohm
Low Noise Amplifier
Power Gain: 1559 Mhz : 29db
1575 Mhz : 29db
Bandwidth: 50 MHz min.
Noise Figure: 1.5 typ
Filter SAW  Filter
30 dB min @ fo± 100MHz
* fo=1585MHz
Supply Voltages: 2.5~5.5V DC.
Current Consumption: 2.5V:  6.6mA   Typ
3V:    10.6mA Typ.
4V:    14.6mA  Typ
5V:    20.6mA  Typ.
Output Impedance: 50 ohm
Overall Performance: (antenna element, LNA & coax cable)
Center Frequency: 1559 ~1575 Mhz.
Gain: At 90o  vertical to sky 30 ± 4.5dBi
(cable loss)  Note:1
Mounted on the 60mm x 60mm square ground plane
Noise Figure: 2.0 max.
Axial Ratio: 3 dB max.
Bandwidth: 10MHz min.
VSWR: 2.0 max.
Output Impedance: 50 ohm
Operating Temperature: -40oC~ +85oC.
Storage Temperature: -40oC~ +85oC.
Relative Humidity: 95% non-condensing.
Water Resistance: 100% waterproof. IPX8

*This specification is subject to change without prior notice                                            Data Updated: JUN.30, 2016
Note:1:Cable Loss=(-1.2dB/m)