This is a tool I developed to assist us at the Cambridge University Spaceflight Club to design a patch antenna for telemetry.

It is intended only as a very crude estimate, as I have absolutely no idea how accurately I selected the underlying formulae.

Input Parameters:

Dielectric Constant:

Dielectric Thickness:

mm

Target Frequency:

Target Impedance:

Ω

Conductor Thickness:

μm

Velocity Factor:

%

Results:

Patch Width:

Patch Length:

Feed Methods:

Inset Fed:

Inset Length:

widthlengthqwt_

Probe Fed:

Probe Distance from Center:

widthlengthdpf

Edge Fed:

Edge Impedance:

Impedance Required for Quarter Wave Transform:

Required Trace Width for Quarter Wave Transform:

Required Trace Length for Quarter Wave Transform:

50Ω Impedance Microstrip Transmission Line Width:

References

  1. Patch Antennas for the impedance formulae
  2. Quarter Wave Transformer
  3. Microstrip Width Calculator for microstrip formulae
  4. DESIGN AND IMPLEMENTATION OF A CONFORMAL OMNIDIRECTIONAL MICROSTRIP ANTENNA ARRAY ON CYLINDRICAL SURFACE
  5. Study of a conformal UWB antenna designed on various non-planar surfaces
  6. Design and Studies on Non-planar Conformal Patch Antennas for Air-borne Vehicles