Loop antenna glued to the back of a cow - Gain Question
Loop antenna glued to the back of a cow - Gain Question
(OP)
Gentlemen,
I have also submitted this in antennas forun.
I am developing a tracking system operating at 433 MHz that utilizes a loop antenna glued in the horizontal plane to the back side of a cow.
The diameter is 1/4 wave and it will be spaced 1/4 inch from the skin. The height above ground will be 4.5 feet.
According to www.chipcon.com application note AN003, the impedance of flesh is 38-57 ohms (page 15). Pages 5-8 give a lot of information on loop theory but dont help me solve the following problem.
I need to predict propagation. What would be the relative gain of this loop in the horizontal plane compared to a standard 1/4 wave whip and ground plane?
I cannot use a whip in this application.
Thanks very much for your help.
Jim
I have also submitted this in antennas forun.
I am developing a tracking system operating at 433 MHz that utilizes a loop antenna glued in the horizontal plane to the back side of a cow.
The diameter is 1/4 wave and it will be spaced 1/4 inch from the skin. The height above ground will be 4.5 feet.
According to www.chipcon.com application note AN003, the impedance of flesh is 38-57 ohms (page 15). Pages 5-8 give a lot of information on loop theory but dont help me solve the following problem.
I need to predict propagation. What would be the relative gain of this loop in the horizontal plane compared to a standard 1/4 wave whip and ground plane?
I cannot use a whip in this application.
Thanks very much for your help.
Jim
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