Near-Field Gain Correction for Transmission between Horn Antennas
John D. Hunter, I. Morgan
Abstract
John D. Hunter, I. Morgan
Abstract
When the gain of a horn antenna is to be measured from the power transmission loss between it and a standard horn, the Friis transmission formula must be corrected if the horn separation is not considerably greater than 2d2/λ. Expressions for the correction between a pyramidal horn and a conical horn, and between dissimilar pyramidal horns, are presented with sample results. A method of applying these corrections to minimize the errors in the horn gain measurements is described.
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When the gain of a horn antenna is to be measured from the power transmission loss between it and a standard horn, the Friis transmission formula must be corrected if the horn separation is not considerably greater than 2d2/λ. Expressions for the correction between a pyramidal horn and a conical horn, and between dissimilar pyramidal horns, are presented with sample results. A method of applying these corrections to minimize the errors in the horn gain measurements is described.
Key concepts: Horn antenna, French horn, Conical surface, Feed horn, Optics, Physics, Directional antenna, Acoustics