Antennamaker now offer products of own-made WiFi antenna , UHF, RF, GSM, Directional, GPS Antenna to upgrade ODM/OEM service of wireless solutions for whole word's customers.

Antenna News

Russia Requires WiFi Registration
While WiFi wasn’t as broadly unlicensed in Russia as it is in most other industrialized nations, your can not find wifi antenna anywhere a state regulator exempted indoor use in certain bands from registration. The Mass Media agency apparently believes that it has the authority to compel this, although there’s some doubt by observers as to whether it really falls in their purview.
RF Antenna WiFi Antenna GSM Antenna Directional Antenna UHF Antenna Contact Us Home
Home --> GPS Antenna --> GPS Receiver



GM-77 is a GPS Mouse receiver build-in well-known SiRF StarIII GPS chipset. GM-77 provides customer high position, velocity and time accuracy performances as well as high sensitivity and tracking capabilities. Customers benefit from the strength of both companies. Thanks to the low power consumption technology, the GPS-Mouse receiver is ideal for many portable applications such as PDA, Tablet PC, smart phone etc.

Built-in high performance SiRF Star III low power chipset.
Current consumption 40mA
20 channels parallel.
Average Cold Start in 42 seconds.
-159 dBm sensitivity in tracking mode
NMEA0183 compliant protocol

Extreme fast TTFF at low signal level


Personal/Portable Navigation (PDA)
Geographic Surveying
Sports and Recreation
Marine Navigation
Fleet Management
AVL and Location-Based Services




GPS Chip SiRF Star III LP chipset


Frequency L1, 1575.42MHz 10 meters, 2D RMS

7 meters 2D RMS, WAAS corrected

1-5 meters, DGPS corrected

C/A Code 1.023MHz chip rate   0.1 m/sec
Channels 20 CH Time 1ms synchronized to GPS time




Dynamic Conditions
To ¡V 159Bm Tracking, Superior Urban Canyon Performance Altitude <18,000 m (60,000 feet)

Acquisition Rate

Velocity <515 m/sec (1,000 knots)
Cold Start 42 sec, average Acceleration <4g
Warm Start 38 sec, average Motional Jerk <20 m/sec
Hot Start 6 sec, average

GPS Protocol

Reacquisition 0.1sec, average Default: NMEA-0183,


GGA(1), GSA(1), GSV(1), RMC(1), Band rate 9600 bps,
Data bit : 8, stop bit : 1

Accuracy Snap start 2 sec, average


Operation Power 3.5~5.0 VDC+10%
Current Consumption 70mA

Device Size



Operating Temperature - 20 °C to + 80 °C Accessories No
Relative Humidity 5% to 95% non-condensing  

Hardware Interface
The GM-77 includes an antenna in a unique style waterproof gadget. We can manufacture four kinds of Connector cable to suit your demands.

Copyright © AntennaMaker Ltd. All rights reserved.