A dipole antenna coupled electromagnetically to a two-wire transmission line

The properties of a dipole antenna coupled electromagnetically to a two-wire transmission line are studied experimentally. It is found that the coupling of the antenna to the transmission line can be maximized by a proper choice of 1) the angular position of the antenna with respect to the transmission line, 2) the length of the antenna, and 3) the separation of the antenna from the transmission line. The effect of the spacing between the wires of the transmission line on the optimum parameters is investigated. It is found that the optimum angular position of the antenna is not noticeably altered if, instead of a single antenna, an array of properly located antennas is used as the load. The advantage of an antenna array built on this coupling principle is discussed.