3 Element Yagi Antenna Calculator Design Online

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Input Center Frequency (in Hertz) for Antenna Yagi Design Calculation

Input Center Frequency (in MHz) for Antenna Yagi Design
Input Center Frequency
REFL
DR
DIR
RDR
DRD
RE
LAMBDA

For example Design of 3 elements Yagi-Uda Antenna with wide bandwidth. The design requirements of 3-elements yagi antenna: Operating freq.: 61-68 MHz Center freq.: 64.5 MHz The wavelength is calculated using this formula: For example Design of 3 elements Yagi-Uda Antenna with wide bandwidth.
The design requirements of 3-elements yagi antenna: Operating freq.: 61-68 MHz 

Center freq.: 64.5 MHz 

The wavelength is calculated using this formula:

Lambda = Wavelength (in metres) = 300 / frequency (MHz),  Lambda Wavelength (in metres) = 300 / 64.5 (MHz) = 4.6511

Reflector length (REFL)(in metres) = 0.495 x wavelength = 2.30 meter 

Dipole radiator (DE) (in metres) = 0.473 x wavelength = 2.19 meter

Director (DIR) = 0.440 x wavelength = 2.04 meter 

Spacing between elements is the other part: 

Reflector-Dipole radiator (RDR) = 0.125 x wavelength = 0.581 meter 

Dipole radiator - Director  (DRD) = 0.125 x wavelength = 0.581 meter 

Radius of elements (RE) = 0.005 x Wavelength = 0.0232 meter