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GPS antenna design difficulty

thread247-100917

GPS antenna design difficulty

GPS antenna design difficulty

(OP)

Hi all,

i have a questinon about GPS antenna design. As we know a GPS antenna's performance depends on how good is the open sky efficinecy and specifically RHCP. i have designed an antenna to be enclosed in a mobile device that has very poor RHCP but extremely good LHCP. The total Open Sky eff. is about 20% - LHCP : 13% and RHCP: 7%. how can i change my design to improve RHCP?
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RE: GPS antenna design difficulty

"...have designed an antenna..."
"...has very poor RHCP but extremely good LHCP."

Manufacture a mirror image of your antenna.  Everything else being equal, the performance characteristics should swap (LHCP <-> RHCP).

Curious why you are building a GPS antenna of your own design from scratch?

 

RE: GPS antenna design difficulty

Or put your antenna up to a mirror/piece of Aluminum, or point it to the ground and add absorber over the top of the antenna. When RHCP bounces off the ground it changes to LHCP into your antenna.
kch

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