The Power Gain Difference Method Analysis

Radar Position Estimation by Sequential Irradiation of ESM Receivers

In this article, a new technique for determination of 2D signal source (target) position is proposed. This novel approach, called the Inscribed Angle (InA), is based on measuring the time difference of sequential irradiation by the main beam of the target antenna's radiation pattern, using Electronic Support Measures (ESM) receivers, assuming that the target antenna is rotating and that its angular velocity is constant. In addition, it is also assumed that the localization system operates in a LOS (Line of Sight) situation and that three time-synchronized sensors are placed arbitrarily across the area. The main contribution of the article is a complete description of the proposed localization method. That is, this paper demonstrates a geometric representation and an InA localization technique model. Analysis of the method's accuracy is also demonstrated. The time of irradiation of the receiving station corresponds to the direction in which the maximum received signal strength (RSS) was measured. In order to achieve a certain degree of accuracy of the proposed positioning technique, a method was derived to increase the accuracy of the irradiation time estimation. Finally, extensive simulation was conducted to demonstrate the performance and accuracy of our positioning method.

Development of a Remote-Controlled Electrical Interference Vehicle with a Magnetron

This paper describes the design and construction of a remotely controlled mobile interference device designed primarily for interference (jamming) and immunity testing of wireless sensors operating in the 2.4 GHz band (Wi-Fi). The main idea was to build a remotely controlled test device to test the immunity of wireless sensors operating in the 2.4 GHz band directly in field conditions. The remotely controlled mobile interference device is equipped with a special interference apparatus, using a special magnetron tube as a source of interference. Magnetron was selected due to its high performance, allowing interference with wireless sensors over long distances. As magnetron is powered by high voltage (3 kVDC) and is being used in a remotely controlled device, it was important to solve the issue of its power supply using an accumulator. The remotely controlled device was further equipped with the option of detecting and analysing signals in the frequency band of 1 GHz to 18 GHz, adding an extra operational mode that can be used in civil (commercial), industrial, and military applications. Detection and analysis of extraneous signals that may affect our various electronic devices, operating in the 1 GHz to 18 GHz frequency band, is very important. By detecting and analyzing the detected signal, it is possible to recognize what kind of foreign device is transmitting on the detected frequency and how much it can affect the proper functioning of our electronic devices. All the individual parts of the remotely controlled mobile interference device are described in this article in detail, including their optimization for maximum use of the accumulator capacity by which the remotely controlled mobile interference device is powered. A substantial part of this article is devoted to optimizing the interference apparatus power supply with a resonant converter and internal intelligence, where the accumulators' capacity is measured to gain needed predictions for maximum use of Li-Po batteries and thus extending its time of use.