Circular Loop Antenna Calculator

Circular Loop Antenna Calculator

Loop Antenna:

A loop antenna is a radio antenna consisting of a loop or coil of wire, tubing, or other electrical conductor, usually fed by a balanced source or feeding a balanced load. Loop antennas are often used in direction finding and have applications in radio broadcasting and wireless communication systems.

Types of Loop Antennas:

• Small Loop Antenna: Used for reception and is electrically small compared to the wavelength.
• Large Loop Antenna: Its circumference is comparable to the wavelength of the signal it transmits or receives.

Formula for Circular Loop Antenna:

The radius of a circular loop antenna is calculated using the formula:

r = c / (2πf)

Where:

• r = radius of the loop antenna (in meters).
• c = speed of light (\(3 \times 10^8\) m/s).
• f = frequency (in Hz).

The length and width of the substrate are generally 20%-30% larger than the diameter of the loop to minimize edge effects.

Enter Frequency (Hz, MHz, GHz)

Hz MHz GHz

Radius (mm): -

Outer Radius (mm): -

Substrate Length (mm): -

Substrate Width (mm): -