1 av 1 Home Antennas QFH Calculator Language: Español Deutsch - Datasheet Archive

 

1 av 1 Home Antennas QFH Calculator Language: Español Deutsch Introduction Calculator Simulations Dimensions Groundplane

 

Quadrifilar helicoidal antenna - Javascript on-line calculator 1 av 1 Home Antennas QFH Calculator Language: Español Deutsch Introduction Calculator Simulations Dimensions Groundplane Pictures Rendering Version 1 Version 2 Ivan 137MHz ON7EQ 2m ON7EQ 70cm Balthazar Nev G3LMO DNA Antenna Vaisala GPS Pieter 137 Sebastian http://www.jcoppens.com/ant/qfh/calc.en.php Input the data Input data Length of one turn (in wavelengths) Design frequency Number of turns MHz Bending radius 15 mm Conductor diameter 7 mm 0.5 137.5 1 6 6 Width/height ratio 0.44 Calculate Results Wavelength mm 2181.8 Compensated wavelength mm 2336.7 Bending correction mm 6.4 Larger loop Total length mm 2397.4 Total compensated length mm 2423.2 Antenna height mm H1= 731.8 Related: Simple helicoidal Horizontal separator D1= 322 mm Smaller loop Total length mm 2278.3 Compensated total length mm 2304 Antenna height mm H2= 695.8 Horizontal separator D2= 306.1 mm Vertical separator mm 889.6 Compensated vertical separation mm 859.6 Internal diameter Di1= 315 mm Compensated horiz. separation Dc1= 292 mm Vertical tube mm 845.8 Compensated vertical tube mm 815.8 Internal diameter Di2= 299.1 mm Compensated horiz. separator Dc2= 276.1 mm Generate a drilling template To generate a drilling template in PDF form, please enter the following extra data: Vertical support tube diameter: Horizontal support tube diameter: Legend mm mm Generate 2008-06-10 09:00