A new automobile radar based on the six-port phase/frequency discriminator

Miguélez, Cristina; Huyart, B.; Bergeault, E.; Jallet, L.

doi:10.1109/25.875273

Cited by 54 publications

(11 citation statements)

References 7 publications

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“…About 20 years after the beginning of six-port technology for reflectometer applications, the first publications that proposed this concept as a radar system can be found [13,14,15,16,17]. Compared to all other topics, this aspect has been treated rather sporadically and only from a very basic point of view.…”

Section: Six-port Architecturementioning

confidence: 99%

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Six-Port Based Interferometry for Precise Radar and Sensing Applications

Koelpin

Lurz

Linz

et al. 2016

Sensors

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Microwave technology plays a more important role in modern industrial sensing applications. Pushed by the significant progress in monolithic microwave integrated circuit technology over the past decades, complex sensing systems operating in the microwave and even millimeter-wave range are available for reasonable costs combined with exquisite performance. In the context of industrial sensing, this stimulates new approaches for metrology based on microwave technology. An old measurement principle nearly forgotten over the years has recently gained more and more attention in both academia and industry: the six-port interferometer. This paper reviews the basic concept, investigates promising applications in remote, as well as contact-based sensing and compares the system with state-of-the-art metrology. The significant advantages will be discussed just as the limitations of the six-port architecture. Particular attention will be paid to impairment effects and non-ideal behavior, as well as compensation and linearization concepts. It will be shown that in application fields, like remote distance sensing, precise alignment measurements, as well as interferometrically-evaluated mechanical strain analysis, the six-port architecture delivers extraordinary measurement results combined with high measurement data update rates for reasonable system costs. This makes the six-port architecture a promising candidate for industrial metrology.

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Section: Six-port Architecturementioning

confidence: 99%

“…Furthermore, combinations of the common FMCW radar concept and six-port continuous wave (CW) interferometry have been proposed [14]. Furthermore, six-port radars showed their usability for Doppler and velocity measurements [15,35]. …”

Section: Six-port In Metrologymentioning

confidence: 99%

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Koelpin

Lurz

Linz

et al. 2016

Sensors

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“…By means of a straightforward mathematical development, equation (5) may be rewritten as a linear combination of output powers as the following equation: p = aP3+ bP4+ cP5+ d (7) in which a, b, c and d are complex constants determined by the calibration procedure dependent on the interferometer characteristics and on the the power level at port 1.…”

Section: P6mentioning

confidence: 99%

“…Along the years many developments have been done to increase the accuracy of data measured by means of efficient calibration methods, Wiedman et al (3), and junction design improvement, Hansson and Riblet (4). During the last decade the six-port reflectometer has been considered in general applications such as direct-conversion receivers, Tatu et al (5) and Huang et al (6), anti-collision radars, Migelez et al (7) and direction finding systems, Huyart et al (8).…”

Section: Introduction Theoretical Formulationmentioning

confidence: 99%

“…These techniques increase the system data-rate, but limit the receiver to angle modulated signals in addition to depriving the system of the digital signal processing advantages. In the six-port based collision avoidance systems described in Migelez et al (7), the strong dependence on digital signal processing compromises its applicability in real time devices.…”

Section: Introduction Theoretical Formulationmentioning

confidence: 99%

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Five-port junction: In the way of general public applications

Sousa

Neveux

García

et al. 2002

32nd European Microwave Conference, 2002

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Digital Microwave Receivers

Luy

Mueller

2005

Encyclopedia of RF and Microwave Engineering

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Reducing complexity in RF systems is a challenge. Research for new broadband and multistandard antennas, high‐frequency bus concepts, and software‐configurable hardware platforms in order to fulfill the needs caused by an increasing number of communication and navigation standards are ongoing tasks. The high‐speed building blocks of software‐configurable digital receivers are composed of lowpass or bandpass filters, sampling and analog‐to‐digital converter (ADC) circuits, and decimator functions that convert the high‐speed sampling rates into lower rates and higher resolution, respectively. The specific design of receiver hardware architecture is a compromise between the specifications of the services to be handled by the receiver and the availability of components. The concept of bandpass‐limited subsampling (i.e., where the sampling frequency is lower than the carrier frequency) has become a very appropriate architectural approach as increasing cutoff frequency and speed of semiconductor technologies can be traded against resolution in this concept. Direct sampling poses high requirements for the analog‐to‐digital converter (ADC). The requirements are reduced significantly if a six‐port digital receiver architecture is used. The functional principle of six‐port devices is based on the measurement of four independent output powers corresponding to the complex ratio between two superposed electromagnetic waves under different phase angles. The six‐port architecture can work under broadband conditions but may be disadvantageous compared to direct‐sampling receivers with respect to their dynamic properties. Antialiasing filters are necessary components in ADCs. Three‐dimensional micromachined filter structures can provide high quality factors and low insertion losses at microwave and millimeter‐wave frequencies. Transimpedance amplifiers for a bandpass‐limited subsampling approach and limiting amplifiers can be designed and realized in commercial SiGe technology. The sampling circuit itself may use high‐speed Schottky diodes. Using these technologies, digital receivers are now approaching the millimeter‐wave range.

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A new automobile radar based on the six-port phase/frequency discriminator

Cited by 54 publications

References 7 publications

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Six-Port Based Interferometry for Precise Radar and Sensing Applications

Five-port junction: In the way of general public applications

Digital Microwave Receivers

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