Phase coded pulse Doppler and continuous wave 77 GHz radar measurement and analysis facility

Christensen, J.K.; Underhill, M.J.

doi:10.1049/ip-rsn:20040974

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…A continuous 77GHz signal from a 'phase-coherent' CW radar, when reflected from a smooth or rough spinning cylinder, is converted into a pulse train with a repetion frequency equal to the cylinder spin frequency [1,2,3,4]. The pulses look like those from a pulsar.…”

Section: Introductionmentioning

confidence: 99%

A rotating fan-beam radiation model for the pulse duration and frequency spectrum of pulsar radiation

Underhill¹

2016

2016 European Frequency and Time Forum (EFTF)

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The assumption of a rotating fan-beam of broadband RF radiation appears to fit the observed pulse length to period ratio and pulse amplitude statistics of some pulsars. Here an electromagnetic (EM) mechanism is proposed for the generation of the fan-beam. The radiation pattern is assumed to arise from coupled standing wave components at harmonics of the pulsar spin frequency in radiating layers of (ionospheric) plasma above and around the equator of the pulsar neutron star. The conductive plasma carries current which circulates the magnetic axis of the pulsar. The particle beams emitted from the poles can also act as secondary radiators for the pulse radiation generated by the equatorial layer currents. In this model the radiation is not directed along the magnetic pole axis but is at right angles to it. The frequencies of the multiple layers form a comb spectrum with components spaced at harmonics of the pulsar rotation frequency. The pulse length to period ratio can be argued to be related to the fundamental EM coupling coefficients first presented in [6].

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Section: Introductionmentioning

confidence: 99%

A rotating fan-beam radiation model for the pulse duration and frequency spectrum of pulsar radiation

Underhill¹

2016

2016 European Frequency and Time Forum (EFTF)

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“…In recent years, numerous studies have attempted to reduce traffic accidents by means of intelligent transport systems. Among the many studies, pulse‐Doppler radar has been studied as a core technology for a potential traffic accident warning system [1–7].…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of a hybrid digital and RF front‐end module for 24‐GHz intelligent transport system pulse‐doppler radar

Kim

Lee

2013

Micro & Optical Tech Letters

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This article presents a hybrid digital and RF front‐end module (FEM) of a 24‐GHz pulse‐Doppler radar system for intelligent transport system applications. The conventional pulse generators use analog components such as step recovery diode. It is difficult to control the parameters of the pulse. In addition, the heterodyne architecture based transceivers show good performance, but they are very expensive. To overcome these limitations, a digital pulse generator was developed based on field‐programmable gate array platform to obtain high degree of freedom in a waveform design. Instead of the heterodyne architecture, a transceiver based on the homodyne architecture was developed. For the first time, hybrid digital FEM based 24‐GHz pulse‐Doppler radar was developed by combining a digital pulse generator and a homodyne‐based transceiver. Experimental results showed the feasibility of using a hybrid digital FEM for a 24‐GHz pulse‐Doppler radar. The developed hybrid digital FEM contributes to the advancement of the digital radar field. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1631–1638, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27666

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More fundamental instabilities in oscillators?

Underhill¹

2009

2009 IEEE International Frequency Control Symposium Joint With the 22nd European Frequency and Time Forum

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Phase coded pulse Doppler and continuous wave 77 GHz radar measurement and analysis facility

Cited by 7 publications

References 3 publications

A rotating fan-beam radiation model for the pulse duration and frequency spectrum of pulsar radiation

A rotating fan-beam radiation model for the pulse duration and frequency spectrum of pulsar radiation

Design and implementation of a hybrid digital and RF front‐end module for 24‐GHz intelligent transport system pulse‐doppler radar

More fundamental instabilities in oscillators?

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