It probably isn't a matter of luck. Automotive style antennas were
designed to be attached to the roof of the car, which is a ground
plane. The pizza pan probably does a good job of simulating a car
roof.
It is my understanding that the choke rings aren't there to improve
the gain, but rather to eliminate the signal from satellites that are
too close to the horizon.
-Chuck Harris
Don Latham wrote:
Hi all: for the proper dimensions, see some of the sections of W1GHZ's
microwave antenna handbook to get the appropriate size for the pizza pan
choke. Mark may have gotten lucky...
Don
Magnus Danielson
Mark,
I'll take salami, onion and mozzarella...
Mark Sims wrote:
I bought a couple of pizza pans for the GPS Patch Antenna Improvement
Program... preliminary results:
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