Kazansky O. Radiation and scattering of wideband pulse signals by complex structures from tapered slot antennas

The object is process of radiation and scattering of a pulse signal. The purpose: A processes of radiation and scattering of broadband pulsed signals by complex structures from tapered slot antennas. What is proposed the use of special antenna systems for controlled radiation video-pulse signals with the possibility of synthesizing radiation patterns. To solve these problems it is necessary to build a model to calculate the radiation fields in the far field in the time domain. Based on this model also planned to create a new retrodirectivity antenna systems for videopulses and reradiation of pulse signals by circular TSA arrays. Provide synthesis patterns by using special antenna systems allows us to construct a basis for three-dimensional subsurface ground penetrate research. The new results are the following: The electrodynamic model for calculation of radiation fields of two-dimensional array of tapered slot antennas (TSA) has been obtained in the work for pulse signal excitation. The influence of a placement of elements of two-dimensional array on width of pattern has been determined. Dependences of main lobe direction on time delay of array element excitation have been received. Firstly the circular array of TSA in case of pulse excitation has been proposed. The influence of array element excitation polarities on pattern forming and time delay excitation on pattern has been determined. Retrodirective TSA array of Van Atta in the case of pulse signal reradiation is investigated. The possibility of using these systems in pulsed mode has been demonstrated. Sector of angles, which provides a high level of reradiated pulse signal, has been defined. A new electrodynamic model for subsurface pulse sounding by two-dimensional TSA arrays has been proposed. It allowed creating the images of subsurface objects that are shadowed in sounding and improving their contrast in several times.