Antenna of two linear radiators in a near region

As is well known, an electric radiator field is divided conventionally into three regions: a near region (an induction region or Fraunhofer one), an intermediate region (or Fresnel one) and a far region (a radiating one). Until recently radiators properties in a near region arouse a weak interest among antennas creators. But now these questions importance increased in view of problems of facilities electromagnetic compatibility. The compensation method gives a principal opportunity to create a weak field zone close to antenna. At that the antenna pattern in horizontal plane is undistorted. In addition to the main radiator the second (additional) radiator located between the main radiator and the mentioned zone and exited approximately in anti-phase to it (approximately because of a field´s phase progression along the interval between the radiators) is connected in the antenna. Then the radiators´ fields will compensate each other in some point, and around this point a zone of a weak field (a dark spot) will arise. Symmetric linear radiator (dipole) with two feed points and asymmetric linear radiator (monopole) with elevated feed point having the same field in the upper half- space are the most complicated variants of simple linear radiators. And so their properties in a near region need analysis.