An Ultra Broadband Multi-Tone Six-Port Radar for Distance Measurements in K-Band Waveguides

Heining, Simon; Michler, Fabian; Scheiner, Benedict; Hassan, Emad S.; Koelpin, Alexander; Weigel, Robert; Lurz, Fabian

doi:10.1109/rws45077.2020.9050025

Cited by 4 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a side-effect of low-power systems, costs are reduced because no wires are needed for the installation of selfsufficient radar-systems. Applications for low-power sensors can be sensors for tank level [78], [79], occupancy and vibration monitoring or even vital sign detection.…”

Section: Low-power Applicationsmentioning

confidence: 99%

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

et al. 2021

Self Cite

View full text Add to dashboard Cite

Radar sensors have been widely used to estimate speed and displacement of remote targets. A novel market for contactless radar sensing is emerging in the field of automatization and process analysis, where non destructive testing and evaluation methods are desired. Here, modern radar systems offer various advantages over conventional sensors since they enable the contactless, continuous, and cost-efficient measurement of static or dynamic ranges. These can further be used for vibration and vital sign characterization. Advances in microwave technology, an increasing integration density, and the development of novel algorithms keep boosting the performance of the systems. After introducing the most common operation principles, such as unmodulated and frequency-modulated continuous-wave radar, different design aspects and building blocks of cutting-edge systems are explained in detail. In the second part, selected applications are described in detail. These include the sheet thickness monitoring of metallic foils, and the measurement of the ground speed of vehicles with the latest approaches. Exemplary low-power radar systems are presented to show the limits in terms of power consumption while still offering a high measurement precision. In addition, the topics of mechanical vibration sensing and vital sign sensing are addressed by introducing tailored systems.INDEX TERMS Radar theory, radar remote sensing, Doppler radar, radar applications.

show abstract

Section: Low-power Applicationsmentioning

confidence: 99%

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…The multi-port architecture was very similar to the original approach, and a calibration process was always used to obtain useful baseband information. Since 2001, multi-port interferometer transceivers operating over microwave or millimeter wave frequencies for various applications from wireless communications to radars have been developed [ 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. All those applications use a quasi-similar multi-port architecture, as described further.…”

Section: Multi-port Interferometry History and Basic Operation Primentioning

confidence: 99%

“…In the transmitter side, a MMIC I/Q direct modulator is used. As seen in Figure 43a, the Analog Devices MMIC type HMC MDB 218 GaAs sub-harmonic mixer (54)(55)(56)(57)(58)(59)(60)(61)(62)(63)(64) [91] is embedded in a home-made fixture, as described previously for the multi-port. It is fed by a 10 dBm millimeter wave signal having half of the V-band frequency signal.…”

mentioning

confidence: 99%

Millimeter Wave Multi-Port Interferometric Radar Sensors: Evolution of Fabrication and Characterization Technologies

Tatu

Moldovan

2020

Sensors

View full text Add to dashboard Cite

Recent advances in millimeter wave technologies, both in component and system design, in line with important size and cost reductions, have opened up new applications in ultra-high-speed wireless communications, radar and imaging sensors. The paper presents the evolution of millimeter wave circuit and modules fabrication and characterization technologies in the past decades. Novel planar low-cost fabrication technologies have been successfully developed in this period. In combination with the standard rectangular wave-guide technology, these offer great opportunities for prototyping and testing of future millimeter wave transceivers or front-ends, which integrate antenna arrays, down-converters, modulators, amplifiers, etc., in a compact fixture. The paper uses, as a suggestive example, the evolution of the multi-port interferometric front-ends implementation from millimeter wave bulky components and systems to miniaturized and high-efficient ones. Circuit and system designs are carefully done to avoid (as much as possible) complicated calibration methods or difficult post-processing of baseband data. This requires an increased effort in design and fabrication, but it allows miniaturization, low-power consumption, while keeping very good overall performances. Useful and straightforward laboratory characterization techniques of circuits and systems are described in detail.

show abstract

“…(31)(32)(33) Compared with the optical-based method, microwave and millimeter-wave interferometries have advantages against harsh environments such as fogs, oils, and powders in practical applications. (34)(35)(36)(37)(38) Using microwave integrates and monolithic microwave integrated circuits, Kim and Nguyen realized a millimeter-wave sensor with a resolution of λ 0 /840, where λ 0 is the free space wavelength. (34) Using frequency and phase evaluation algorithms, Ayhan et al developed a frequency-modulated continuous wave radar system for high-accuracy range detection.…”

Section: Introductionmentioning

confidence: 99%

“…(36) By combining several continuous wave radars with different operating frequencies, the measurement accuracy of the radar system can be improved further. (37,38) However, interferometry is a typical phase-sensitive measurement, which usually requires additional hardware and complex signal processing to achieve reliable precision. In this paper, we propose a potential thickness variation monitor with deep-subwavelength accuracy based on the sensitive thickness-dependent absorption of the designed MMA.…”

Section: Introductionmentioning

confidence: 99%

Remote Monitoring of Deep-subwavelength Thickness Variation Using Deformable Metamaterial Absorbers

Yin,

Jia,

You

et al. 2023

Sensors and Materials

View full text Add to dashboard Cite

Interferometry, a typical phase-sensitive measurement, usually requires additional hardware and complex signal processing to achieve subwavelength resolution. In this paper, we propose a potential thickness variation monitor, in which only reflection losses are needed to achieve deepsubwavelength accuracy. The proposed monitor is based on a sensitive thickness-dependent metamaterial absorber (MMA), which is made of split copper rings periodically arranged in a flexible and nonabsorbent thermoplastic polyurethane base. Experimental results showed that the frequency of the absorption peak increases almost linearly in the range from 6.655 to 6.755 GHz when the thickness of the MMA decreases from 25.625 to 24.833 mm with a step of 0.0417 mm, about a thousandth of the central wavelength of this frequency region. The effects of two key geometry parameters, i.e., the distance from the split copper ring to the metal base and the gap width of the split copper ring, on the absorption performance are investigated by numerical simulation. Our results may provide a simple method of monitoring deepsubwavelength thickness variation in the far field.

show abstract

An Ultra Broadband Multi-Tone Six-Port Radar for Distance Measurements in K-Band Waveguides

Cited by 4 publications

References 10 publications

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

Micrometer Sensing With Microwaves: Precise Radar Systems for Innovative Measurement Applications

Millimeter Wave Multi-Port Interferometric Radar Sensors: Evolution of Fabrication and Characterization Technologies

Remote Monitoring of Deep-subwavelength Thickness Variation Using Deformable Metamaterial Absorbers

Contact Info

Product

Resources

About