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Naamanf · 11-22-2003, 09:45 PM

Quote: Originally Posted by brownpage

So, what's the difference between a car antenna and a GPS antenna? I am no electric technician so sorry for the ignorance. I thought that they both receive signals, only frequency differs. And GPS frequecny is 1575.42 MHz, while FM radio has a frequency of ~ several hundred MHz. So GPS frequecny is not too much different from a radio frequency. So maybe their antenna design is simiar?

But, maybe GPS antenna is not only an antenna, but also includes filter or something else. In that case, it can't be replaced by normal car antenna.

Thanks for advices.

FM radio is in the 90-110 mhz range. The size of the radio waves is very different. And in simple terms the size of the wave (due to it's frequency) will determine the size of the antenna. The lower the frequency the larger the antenna.

11-22-2003, 09:45 PM	#4
Naamanf Maximum Bitrate Naamanf's CarPC Specs Join Date: Sep 2003 Location: Colorado Vehicle: 2007 Tahoe, 1979 Pontiac Trans Am, 1971 Hemi 'Cuda Posts: 503 My Photos: ()	Quote: Originally Posted by brownpage So, what's the difference between a car antenna and a GPS antenna? I am no electric technician so sorry for the ignorance. I thought that they both receive signals, only frequency differs. And GPS frequecny is 1575.42 MHz, while FM radio has a frequency of ~ several hundred MHz. So GPS frequecny is not too much different from a radio frequency. So maybe their antenna design is simiar? But, maybe GPS antenna is not only an antenna, but also includes filter or something else. In that case, it can't be replaced by normal car antenna. Thanks for advices. FM radio is in the 90-110 mhz range. The size of the radio waves is very different. And in simple terms the size of the wave (due to it's frequency) will determine the size of the antenna. The lower the frequency the larger the antenna. __________________ 2007 Tahoe Opus with iBase 896 and Pentium M 735 Transflective Xenarc Alpine DVA-9861, PXA-H900, Sinfoni 45X2 (2) 90x2, Genesis Dual Mono, JL 1000/1 (2), Focal Be tweeters, ScanSpeak Revelator Mids, Dynaudio MW170, Dayton 12" Ref. My Install