GPS Navigation System

GPS Navigation System >> The Addition Of External GPS Antenna

By Jay

External GPS Antenna

How much important to install an external antenna on Portable GPS Navigation System? Some people like Will O’Brien Said “GPS is a nifty piece of technology. GPS hardware needs to have a clear view of the sky because it’s satellite based, so using your handheld unit can be a problem when the roof of your car is blocking signal Reception. The obvious answer is to add an external antenna. The catch-22 is that many GPS units lack external antenna jacks “. [download#1] (not recommended for un skill )

Adding an external antenna on Portable GPS Navigation System depends on the location of use. If you use a GPS unit inside the building, the roof of your car is blocking signal reception, or any place that impedes the satellite signal, the addition of external antenna is absolutely necessary. Moreover, if the Portable GPS Navigation System is classified as low sensitivity GPS receiver.

But most Portable GPS Navigation System is used for outdoor purposes. So in fact the external antenna is not needed, especially on the GPS units that are High sensitivity GPS receiver. But if you still wish to add external antenna, it’s good attention to some factor below.

Some technical factors that required to add external GPS antenna

• External GPS Antenna Must Be Compatible With GPS Handheld
• Center Frequency Exam 1575.42mhz Working At ± 3 Mhz
• Band Width Exam Working At ± 5 Mhz
• Impedance Exam working at 50 Ohm
• Peak Gain,-4dbic, Polarization RHCP
• Dc Voltage, Dc Current
• Antenna Connector Must Fit To Your GPS Unit

We recommend that you avoid using an external GPS antenna for outdoor use. Currently, many GPS units have been equipped with a High sensitivity GPS receiver, so that the reception of satellite signal does not interfere. But if needed, use the dielectric antenna type and be carefull if using active external antenna. Good Luck…