Suggestions needed on Quadrifilar Helicoidal Antenna

HI,

I have designed the quadrifilar helicoidal antenna. If the the two loops are of different axial length and differnt diameter and are made of solid copper conducter of 3mm. Than what is the procedure for providing feeding, how the joints of both the loops are connected with the coax cable as the both the loops are of solid conducter. What is the configration of connecting the single coax to conducters. Awaitning an early response. Thx with regards.