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Pang, C. (author), Hoogeboom, P. (author), Russchenberg, H. (author), Wang, T. (author), Dong, J. (author), Wang, X. (author)In this paper, the polarization error correction of dual-polarized planar scanned array weather radar in alternately transmitting and simultaneously receiving (ATSR) mode is analyzed. A method based on point correction and a method taking the complete array patterns into account are discussed. To analyze their performances, a linear error model...conference paper 2014
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Suijker, E.M. (author), Bolt, R.J. (author), van Wanum, M. (author), van Heijningen, M. (author), Maas, A.P.M. (author), van Vliet, F.E. (author)In this paper a first time right 24 GHz FMCW radar transceiver is presented. The MMIC has a low power consumption of 86 mW and an output power of -10 dBm. Due to the integrated IF amplifier, the conversion gain of the receiver is 51 dB and the base band signals are directly processed with an ADC. The developed antenna is a PCB dipole array with...conference paper 2014
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van Heijningen, M. (author), Hoogland, J.A. (author), de Hek, A.P. (author), van Vliet, F.E. (author)The front-end circuitry of transceiver modules is slowly being updated from GaAs-based MMICs to Gallium-Nitride. Especially GaN power amplifiers and TR switches, but also low-noise amplifiers, offer significant performance improvement over GaAs components. Therefore it is interesting to also explore the possible advantages of a GaN mixer to...conference paper 2014
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Li, Y. (author), Hoogeboom, P. (author), Russchenberg, H. (author)Fog is a significant factor affecting the public traffic because visibility is reduced to a large extent. Therefore the determination of optical visibility in fog from radar instruments has received much interest. To observe fog with radar, high frequency bands (millimeter waves) have the best option. A 35 GHz cloud radar at the Cabauw...conference paper 2014
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Pang, C. (author), Hoogeboom, P. (author), Russchenberg, H. (author), Wang, T. (author), Dong, J. (author), Wang, X. (author)In this paper, the polarization error correction of dual-polarized planar scanned array weather radar in alternately transmitting and simultaneously receiving (ATSR) mode is analyzed. A method based on point correction and a method taking the complete array patterns into account are discussed. To analyze their performances, a linear error model...conference paper 2014
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van Dijk, R. (author), van der Bent, G. (author), Ashari, M. (author), McKay, M. (author)We present a demonstration of an integrated circulator for TR modules using low temperature co-fired ceramic (LTCC) technology. Two different circulators have been realised to be used in TR modules in two different frequency bands, C-and Ku-band. The circulator is a three-port junction microstrip type device. The ferrite disc is embedded in the...conference paper 2014
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Suijker, E.M. (author), Bolt, R.J. (author), van Wanum, M. (author), van Heijningen, M. (author), Maas, A.P.M. (author), van Vliet, F.E. (author)In this paper a first time right 24 GHz FMCW radar transceiver is presented. The MMIC has a low power consumption of 86 mW and an output power of -10 dBm. Due to the integrated IF amplifier, the conversion gain of the receiver is 51 dB and the base band signals are directly processed with an ADC. The developed antenna is a PCB dipole array with...conference paper 2014
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Nooij, P.N.C. (author), Theil, A. (author)Blake chart computations are widely employed to rank detection coverage capabilities of competitive search radar systems. Developed for comparable 2D radar systems with a mechanically rotating reflector antenna, it was not necessary to regard update rate and plot quality in Blake's chart. To characterize the system's critical awareness, the...conference paper 2014
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Harmanny, R.I.A. (author), de Wit, J.J.M. (author), Prémel Cabic, G. (author)The radar micro-Doppler signature of a target is determined by parts of the target moving or rotating in addition to the main body motion. The relative motion of parts is characteristic for different classes of targets, e.g. the flapping motion of a bird's wings vs. the spinning of propeller blades. In the present study, the micro-Doppler...conference paper 2014
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van der Bent, G. (author), de Hek, A.P. (author), van der Graaf, M. (author), van Vliet, F.E. (author)A 50 W S-band High Power Amplifier in the UMS GH25-10 technology is presented. In order to increase the output power per area the size of the transistors is increased beyond the maximum size modelled by the foundry. For this reason the design procedure included the measurements of a transistor and the creation of a scalable Angelov-GaN model...conference paper 2014
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van Dijk, R. (author), van der Bent, G. (author), Ashari, M. (author), McKay, M. (author)The front-end circuitry of transceiver modules is slowly being updated from GaAs-based MMICs to Gallium-Nitride. Especially GaN power amplifiers and TR switches, but also low-noise amplifiers, offer significant performance improvement over GaAs components. Therefore it is interesting to also explore the possible advantages of a GaN mixer to...conference paper 2014
- document
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Li, Y. (author), Hoogeboom, P. (author), Russchenberg, H. (author)Fog is a significant factor affecting the public traffic because visibility is reduced to a large extent. Therefore the determination of optical visibility in fog from radar instruments has received much interest. To observe fog with radar, high frequency bands (millimeter waves) have the best option. A 35 GHz cloud radar at the Cabauw...conference paper 2014
- document
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van der Bent, G. (author), de Hek, P. (author), van der Graaf, M. (author), van Vliet, F.E. (author)A 50 W S-band High Power Amplifier in the UMS GH25-10 technology is presented. In order to increase the output power per area the size of the transistors is increased beyond the maximum size modelled by the foundry. For this reason the design procedure included the measurements of a transistor and the creation of a scalable Angelov-GaN model...conference paper 2014
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van Heijningen, M. (author), van der Bent, G. (author), van der Houwen, E.H. (author), Chowdhary, A. (author), van Vliet, F.E. (author)Solid-state power amplifiers need protection at the output to handle high reflections due to mismatch. Normally this is implemented by using a ferrite-based isolator. These are however large and bulky components. This paper presents a Gallium-Nitride power amplifier module with automatic protection against large reflections based on fold-back...conference paper 2013
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Molchanov, P. (author), Egiazarian, K. (author), Astola, J. (author), Harmanny, R.I.A. (author), de Wit, J.J.M. (author)The problem of unmanned aerial vehicles classification using continuous wave radar is considered in this paper. Classification features are extracted from micro-Doppler signature. Before the classification, the micro-Doppler signature is filtered and aligned to compensate the Doppler shift caused by the target’s body motion. Eigenpairs extracted...conference paper 2013
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van Heijningen, M. (author), van der Bent, G. (author), van der Houwen, E.H. (author), Chowdhary, A. (author), van Vliet, F.E. (author)Solid-state power amplifiers need protection at the output to handle high reflections due to mismatch. Normally this is implemented by using a ferrite-based isolator. These are however large and bulky components. This paper presents a Gallium-Nitride power amplifier module with automatic protection against large reflections based on fold-back...conference paper 2013
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Marck, J.W. (author), Mohamoud, A.A. (author), van de Houwen, E.H. (author), van Heijster, R.M.E.M. (author)Indoor navigation especially in unknown areas is a real challenge. Simultaneous Localization and Mapping (SLAM) technology provides a solution. However SLAM as currently based on optical sensors, is unsuitable in vision denied areas, which are for example encountered by first responders. Radar can be used to overcome this drawback, however no...conference paper 2013
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Marck, J.W. (author), Mohamoud, A.A. (author), van de Houwen, E.H. (author), van Heijster, R.M.E.M. (author)Indoor navigation especially in unknown areas is a real challenge. Simultaneous Localization and Mapping (SLAM) technology provides a solution. However SLAM as currently based on optical sensors, is unsuitable in vision denied areas, which are for example encountered by first responders. Radar can be used to overcome this drawback, however no...conference paper 2013
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van Dorp, P. (author)In this paper, a new signal processing technique for Multiple-Input Multiple-Output (MIMO) image processing of a Linear Frequency-Modulated Continuous Wave (LFMCW) automotive radar was developed. The image is the range-speed-direction data cube. The technique comprises two improvements to the standard MIMO image processing: 1) A fast unambiguous...conference paper 2013
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van Dorp, P. (author)In this paper, a new signal processing technique for Multiple-Input Multiple-Output (MIMO) image processing of a Linear Frequency-Modulated Continuous Wave (LFMCW) automotive radar was developed. The image is the range-speed-direction data cube. The technique comprises two improvements to the standard MIMO image processing: 1) A fast unambiguous...conference paper 2013