A Student's Scale Model Antenna Test Range

Details of an X-band antenna test range built from readily available components are presented. The design is primarily for student use but may be used for antenna research as well. A feature of the design is the ease with which antennas of different impedances may be matched to a coaxial antenna feed and in turn to the waveguide source. The far field radiation pattern of the test antenna is recorded from relative field intensity levels measured at any point on a hemisphere. The test range occupies an area of approximately two by three feet. Details on four antennas demonstrate different radiation patterns and matching techniques. Suggestions for a student's experiment are included.