biff44
Electrical
- Oct 19, 2004
- 497
Anyone have any suggestions for designing a dual polarization antenna for a receiver. I have a small key fob with a loop antenna, but the user can hold it in any orientation. Obviously, when he holds it so it is cross polarized with my monopole antenna on the receiver, she'sa no work! I was thinking if there were some sort of dual polarization antenna on the receiver front end, it would not really care what way the key fob was held (although there might be a 3dB hit in maximum received signal). I saw a TI patent (5,592,182) for a dual crossed loop design that was supposed to be CP. Anyone know anything about this, or another cool way to do it.
So in summary, I have a single polarizaton (loop) antenna in a key fob that I want to receive with a dual polarization antenna on the reciever so that it would be relatively insensitive to user operation.
So in summary, I have a single polarizaton (loop) antenna in a key fob that I want to receive with a dual polarization antenna on the reciever so that it would be relatively insensitive to user operation.