J-type antenna size online calculator
App Description
Because of its simple production and easy material selection, J-type antenna has been favored by FM transmitter enthusiasts. It can be used with air-conditioning copper tubes of about 1 mm. It can be produced according to the calculated size and can achieve good results without professional tools.
Usage example
The input frequency can be used to find the short length of the J-type antenna, B is short, C is short, and D is short.
Input frequency: 100MHz
Output results:
Section A length: 7.05 feet, 84.60 inches, 2.149 meters
Section B Length: 2.34 feet, 28.8 inches, 0.713 meters
Section C Length: 0.23 feet, 2.76 inches, 0.07 meters
Section D Length: 0.22 feet, 2.64 inches, 0.067 meters
Note
If you can't find the copper tube, you can also make it with 2.5 square copper wire.