Antenna Feed Line Question
I am designing 1/4 WL strip antenna for a bluetooth chip and i had some questions regarding the 50 Ohm feed line.
Right now I am using a Nordic-recommended 1.5mm trace width and a 23mm + 4mm(for tuning purposes) trace length as my antenna. My feed line is 2mm away from the antenna and the microstrip calculator I am using has recommended me ~3mm as the width of the feed line. Since this feed-line width is so large relative to the 2mm distance away from the antenna, I have just made the feed line the size of the pads of the matching network. My question is - can I get away with fudging it like this, or must I draw the ground plane out further so I can accommodate that 3mm feed line?
In the first picture below, I am not using the 3mm feed line but am making it as large as the matching network smd pads can accommodate. In the second picture, I am drawing out the ground plane in order to have enough room for the 3mm trace width. Which is less likely to jack it all up? Thanks.