A new approach to the justification of requirements to facilities of protection of electronic devices and systems from intentional forced electromagnetic effects is proposed. Unlike the traditional approach, defining the criterial levels of warranted destructive effect, the proposed approach is based on the determination of opposite parameters, i.e., the criterial levels of the absence of any substantial responses to outside effects that are nonlinear and catastrophic. This helps decrease the requirements not only to radiating generators, but also to the information recording system of the test-objects, which should record reliably the absence of failures in the standard operation conditions of the facilities.

The state of reliable and, in particular, guaranteed destruction of information on electronic media has been analyzed. Possible ways for solution of this problem have been discussed. Magnetic media that are the most widely used media nowadays have been emphasized.

The results of experiments on interference and suppressing impact by powerful ultrashort subnanosecond pulses on a television surveillance system are presented. It is found that unshielded wires that connect the video cameras and the monitor are the main receiver of the pulse field. The threshold peak amplitudes of the pulse field at which frame synchronization of the monitor and irreversible suppression of the video camera fail are determined.

Basic provisions of methods for evaluating the limiting range of functional suppression of mobile radio stations by powerful ultrashort pulses through various obstacles (doors and walls) inside buildings are presented.

For the purpose of a substantial increase of the range and resolution of nonlinear radars, we proposed a new technology for pulse transmission and reception, based on the use, for object probing, of a package of four (the simplest version) pairwise asymmetrically polar ultrashort ultrabroadband pulses followed by processing of received echo signals by the Immoreev algorithm.

A new method of radio jamming of heterodyne receivers, based on creation of interference at an interim frequency and ensuring an effect, equivalent to the barrage jamming over the entire receiving range with preserved electromagnetic compatibility conditions is described, and its advantages are indicated.

Results of experimental investigations of products of the third-order intermodulation in transmitters are presented. Characteristic features of intermodulation interferences are identified; measures for eliminating adverse effects of such interferences in mobile communication networks are proposed.

Results of experiments for identification and study of the threshold effect by the pulse number, leading to changes in the initial state of the tested radio-electronic equipment affected by a powerful pulse microwave radiation, are given.

Results of experimental investigations of interference effects by powerful short microwave pulses on typical electromagnetic and electret microphones of radio-electronic communication and control facilities are presented. The parameters (shape, duration, amplitude) of spurious pulses induced on a microphone are studied as a function of parameters of the pulsed microwave field and the irradiation angle.

Methodological issues related to evaluation of the possible ultra wideband (UWB) radio communication range without scattering and with interim scattering on a passive relay object depending on the rate of information transmission as a sequence UWB pulses in conditions of regulatory restrictions of the emission level are analyzed. Examples of calculation of maximum communication ranges when the pulse transmission-reception system uses three types of antenna pairs, i.e., hypothetical aperture antennas, horn antennas P6-23A, and dipole antennas, are given and analyzed.

Исследована модификация конструкции объемного биконического вибратора, отличающаяся наличием на его боковой поверхности системы канавок кольцевой формы. Показано, что в такой антенне при прежних ее габаритах нижняя рабочая частота может быть уменьшена на 20%, а при заполнении канавок диэлектриком — и более.

The paper is devoted to investigation of a version of solid biconical vibrator having several ring-shaped grooves on its side surface. With the same overall dimensions of such antenna, its lower operation frequency can be decreased by 20% and, if using the grooves with dielectric — even by a larger value.

The paper presents the results of experiments concerning the impact of nonlinear clutter of powerful nanosecond pulses on radiotelephones, causing them to malfunction, and on nearby communication transceivers, for the deliberate distortion of signals radiated into space and for forced switching of the transmitter’s generators to a mismatched load with subsequently causes them to go out of service because of overheating. Some unique features of this type of clutter are discussed, as well as advantages of radio suppression of telecommunication systems with the aid of such interference.

Results of the experiments on nonlinear noise impact of powerful ultrashort pulses on radio telephones of mobile communication with the aim to cause functional failures in them, and on a nearby communication transmitter for deliberate distortion of the signal irradiated by it, are presented. The characteristics of arising noise (jamming)9 and advantages of the ways of radio suppressing them used by modern telecommunication systems are considered.

Приведены результаты экспериментов по нелинейному помеховому воздействию мощных наносекундных импульсов на сотовые радиотелефоны с целью вызывания в них функциональных сбоев, а также на близко расположенные связные приемо-передатчики с целью преднамеренного искажения излучаемых ими в эфир сигналов и принудительного переключения работы генераторов передатчиков на несогласованную нагрузку с последующим выводом их из строя вследствие перегрева. Обсуждены особенности возникающих помех и достоинства способов радиоподавления телекоммуникационных систем этими помехами.

An experimental investigation was made of the feasibility of phase conjugation by four-wave mixing in the active medium of an electron-beam-controlled CO laser when generating a backscattered wave in a loop system. The energy of a backscattered pulse was 0.3 J, representing nearly 10% of the pump energy at the entry to the amplifier. Theoretical calculations were made of the reflection coefficients of weak waves incident on gain gratings. This was done for all the transitions as a function of the angle of incidence. The strongest reflection was observed for the radiation propagating opposite to the pump waves.

The spectra of reflectivity and transmissivity of gain gratings induced by cw CO laser radiation in a flow active medium were calculated. Strong variations in the reflectivity spectrum for the different sets of relative phases of the interference fields were disclosed.