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Recent developments in SAR data processing have paved the way towards more and highly flexible imaging modes and significant improvements with respect to area coverage and resolution. Here, for instance Digital Beam Forming (DBF) will enable the development of SAR missions which mitigate the old ‘area-for-resolution’ trade-off. Furthermore, the recent 1200MHz frequency allocation by ITU for commercial...
The correlation methods for signal receiving are widely used due to wideband electronics systems development. This technique gives high improvements for device features. Correlation methods are nowadays used in microwave metrology, radiolocation, medicine and in military applications in particular. In this place it should be mentioned: FMCW radars, noise radars, direction finding systems for electromagnetic...
In this paper a novel 61GHz radar sensor node for industrial positioning and distance measurement is presented. The sensor provides numerous functions enabling a broad range of signal processing technologies and is designed with regard to cost-efficient implementation only using commercial available components without limiting the area of possible applications. Beside the requirement analysis and...
This paper reports on GaN transistors having a power output in excess of 1kW for use at L-band frequencies. A 1200W GaN HEMT will be reported with 85% efficiency, this is believed to be the highest power and efficiency combination ever reported for an L band transistor. The importance of using gate pulsing is illustrated to achieve these high efficiencies. The development of GaN transistors that can...
Waveguide monopulse summing-differential novel system is presented in the paper. The principle operation of proposed system and its sum and difference frequency characteristics are presented. Calculation of parameters waveguide system were done with aid CST Micro-Wave Studio computer program.
Frequency-stepped continuous wave (FSCW) radars have been recently investigated in health care aiming at contactless health monitoring. The mono-static radar architecture is of particular interest due to its low cost. However, monostatic radars suffer from the leakage between the transmitter and receiver paths, which can drastically reduce the detection range of the radar. This paper proposes the...
The paper presents the results of a project leading to design and fabrication of a transmitting-receiving module destined for application in an active electronically scanned array (AESA). The module is supposed to operate in the band from 9 GHz to 10 GHz. GaAs technology core chip is applied and it is used to drive power amplifiers based on GaN technology. The shape of the module enclosure follows...
Space-based SAR technology enables weather & daylight-independent monitoring capabilities over vast regions, at different spatial-resolution modes. Availability in lieu of intuitiveness and Area in lieu of Resolution are known trade-offs for those in urgent need of information. Newest techniques are changing the game as the old trade-offs crumble. Offered here is an overview of past space-borne...
A procedure of tacking small flying object based on a general principle of FMCW and Doppler radar is presented. In order to increase measurement range, this technique uses active signal source on the moving object. For simultaneous measurements of distance, radial velocity and direction (AoA) as well as simplified synchronization a combined FMCW-CW waveform is proposed. The presented measurement system...
It is a challenge to detect and identify the targets in the foliage-penetration environment. Radar is superior to other sensors in this poor visibility condition. The micro-Doppler signature is one of the most prominent information for target classification and identification in radar applications. In this paper, a complete procedure is proposed for human micro-Doppler signature extraction in the...
Within this special session paper we present a selection of our designed and prototyped silicon integrated circuits realized in SiGe BiCMOS technology at 10 GHz and 35 GHz. The circuits have been prototyped within European Space Agency contracts that SIRC implements as well as in an NCBiR project. The ICs, prototyped in IHP SG25V and SG13S technologies, have been mounted as chip on board and measured...
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