GPS antenna with linear polarization

Bou · May 16, 2013

Hello,

I know that GPS antenna works with a RHCP but I've found some others GPS antennas that use a linear polarization.

Can anybody explain that to me

I'm so confused now

thanks

RCinFLA · May 17, 2013

Primary driven by simplicity, like compromise to fit in a cellphone.

You give up a little gain, but most importantly you lose much of the multipath reflection reduction. Reflections from building and other earthly objects reverses to mostly LHCP. Multipath rays can corrupt position accuracy.

Some studies argue the LHCP reflection reduction is overrated as vertical or horizontal metal strips of construction reflects as more linear polarization.

Bou · May 17, 2013

RCinFLA said:
Primary driven by simplicity, like compromise to fit in a cellphone.

You give up a little gain, but most importantly you lose much of the multipath reflection reduction. Reflections from building and other earthly objects reverses to mostly LHCP. Multipath rays can corrupt position accuracy.

Some studies argue the LHCP reflection reduction is overrated as vertical or horizontal metal strips of construction reflects as more linear polarization.

I've found that therocally we lost about 3 db if we use a linear polarization, have u any idea how can we calculate this??

GPS antenna with linear polarization

Bou

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RCinFLA

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Bou

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GPS antenna with linear polarization

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