Microstrip Patch Antenna Calculator & Formula

This Microstrip Patch Antenna calculator helps you determine the patch length and width needed for your antenna design. It takes into account the microstrip dielectric, height, and desired operating frequency.

Microstrip lines are a popular choice for antenna designs because they offer a good balance of size, ease of manufacturing, and straightforward troubleshooting. This makes microstrip patch antennas ideal for mobile phones and other RF circuit designs where space is limited.

The calculator outputs the length and width of the patch, requiring you to input:

• RF center frequency
• Dielectric constant
• Height of the substrate

Example:

• INPUTS:
  • Center frequency (Fo) = 1800MHz
  • Dielectric Constant (er) = 11.9
  • Height of substrate (h) = 1.5mm
• OUTPUTS:
  • Patch width = 32.81 mm
  • Patch Length = 24.05 mm
  • Ground Plane Lg = 33.05 mm
  • Ground Plane Wg = 41.81mm

Microstrip Patch Antenna Calculator Formula

The following equations are used in this microstrip patch antenna calculator:

Microstrip patch antennas are commonly used in mobile handsets due to their simple design, low cost, small size, and light weight. They don’t take up much extra space and can be etched directly onto the mobile PCB itself. This example covers a microstrip-based DCS band design for a mobile patch antenna.

Article on Microstrip Lines

Fig.1 : microstrip line

A microstrip line is used to transmit Electro-Magnetic Waves (EM waves) or microwave frequency signals. It consists of three layers:

• A conducting strip
• A dielectric substrate
• A ground plane

Microstrip lines are used to design and fabricate RF and microwave components such as directional couplers, power dividers/combiners, filters, microstrip patch antennas, MMICs, and more.