Engineering topics
Publications and source records attributed to Baddour, Maurice F..
New formula accounts for multiple reflections. In image method antenna placed facing its image in reflecting plane. Power transmitted by antenna and portion of transmitted power received by antenna after reflection from plane measured at various distances R.
Purcell's image method for measuring the absolute gain of an antenna is particularly attractive for small test antennas. The method is simple to use and utilizes only one antenna with a reflecting plane to provide an image for the receiving antenna. However, the method provides accurate results only if the antenna is matched to its waveguide. In this paper, a waveguide junction analysis is developed to determine the gain of an antenna under mismatched condition. Absolute gain measurements for two standard gain horn antennas have been carried out. Experimental results agree closely with published data.