Transmitter Antenna Gain Factor (Monostatic SAR)

The Transmitter Antenna Gain Factor (Monostatic SAR) calculator computes the gain factor based on the effective area of the receiver antenna and nominal wavelength of the radar.

INSTRUCTIONS: Choose units and enter the following:

• (A_e) Effective Area of the receiver antenna
• (λ) Nominal Wavelength of the radar

Transmitter Antenna Gain Factor (G_A): The gain factor is returned in decibels (dB).  However, this can be automatically converted to a real number via the pull-down menu.

The Math / Science

The Transmitter Antenna Gain Factor for a Monostatic Synthetic Aperture Radar equation used in this calculator is:

   `G_A = (4 pi A_e) / lambda^2`

where:

• G_A = Transmitter Antenna Gain Factor
• Ae = Effective area of the receiver antenna
• λ = Nominal Wavelength of the radar

This equation calculates the transmitter antenna gain factor¹ for a monostatic synthetic aperture radar.  This equation is most helpful in the context of calculating the Signal-to-Noise of a Synthetic Aperture Radar.

Radar Calculators

• SNR Gain Due to Azimuth Processing (coherent pulse integration)
• SNR Gain Due to Range Processing (pulse compression)
• Target Radar Cross Section
• Monostatic SAR Transmitter Antenna Gain Factor
• Radar Atmospheric Loss
• SAR Duty Factor
• Grazing Angle
• Slant Range
• Slant Range (Beta Angle)

1. ^ Performance Limits for Synthetic Aperture Radar - Second Edition.  Sandia National Laboratories, Albuquerque, NM.  Printed February 2006.