Dual frequency GPS patch antenna

Hi everyone,

I'm wondering what the size of an antenna for two GPS signals would be. I know very compact patches exist for L1 and high-end large antennas exist for L1 and L2. Does someone know if an L1/L2 patch with the same footprint as the L1 antenna would be possible?

Thanx
Ghoster

Dual frequency antennas are available but they may have a higher noise figure.
brmadhukar

1.2 and 1.5 GHZ...
one wideband antenna or two antennas to cover the bands...

Hi, everybody
The attachment is compact dual-band GPS stacked patch antenna for you reference.

Hi, everybody

Although I have added a file about "dual-band GPS stacked patch atnenna", the stacked patch antenna is still difficulty to design. I suggest you can use foam base to replace FR4 substrate. Also, the bandwidth of 3-dB axial ratio is able to be enhanced greatly.

Hello people,

I have some comments on the shown article:

1- the bandwidths are too narrow and a frequency shift is easy to occur (material tollerance, thermic effects, etc...); I would suggest a broadbanding on every resonating frequency using parasitic elements;

2- I didn't see analysis or measurements about the Antenna Phase Centre ( or Phase diagram) and about Group Delay.. basic parameters for the GPS system;

3- If this is an on-ground antenna, why so much attention is paid for the antenna envelope and the weight?

What's your feeling?

Regards

Lupin