What is the connection impedance on foot of the antenna? Do you have a reference for the copper triangle design?
I think the 18dBi are over optimistic as is the webform calculator you reference to in the excel sheet maybe is not correct? The ones you used gave more conservative values 12-13dBd.
What is the connection impedance on foot of the antenna? Do you have a reference for the copper triangle design?
I think the 18dBi are over optimistic as is the webform calculator you reference to in the excel sheet maybe is not correct? The ones you used gave more conservative values 12-13dBd.