Microstrip-fed Slot Antenna

3D radiation pattern of slot antenna

A microstrip-fed slot antenna was designed using Antenna Magus for the following specifications:

• 5 GHz centre frequency
• 50 Ω input impedance
• FR4 substrate, ε = 4.35, height = 1.5mm

Dimensions of the slot and feed-line are:

• Ws = 743.3 μm
  
• Ls = 18.58 mm
  
• Wf = 2.892 mm
  
• Wm = 625.7 μm
• S = 8.053 mm
  

FEKO's implementation of the planar Greens function features the ability to model the slot in the ground plane as magnetic triangles, which means that only the slot is meshed and not the ground plane itself, saving significantly on simulation resources.

Reflection coefficient of microstrip-fed slot antenna