A Novel Approach for Material Characterization Based on a Retroreflector Wide Band Transceiver Radar

Friederich, B.; Schultze, Thorsten; Willms, Ingolf

doi:10.1109/icuwb.2015.7324408

Cited by 10 publications

(7 citation statements)

References 8 publications

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“…Surface Transceiver Retroreflector The MRE approach is described in [1] in detail. As shown in figure 1 the ellipsometry method requires a certain distance between receiver and transmitter, but for transceiver-systems on a chip this distance is not provided.…”

Section: A Microwave Retroreflector Ellipsomety (Mre)mentioning

confidence: 99%

“…However, to minimize shadowing effects that arrise from the measurement setup presented in [1] a second transceiver is introduced. Hence, a configuration with two transceivers and a retroreflector in a bi-static antenna configuration is employed in this paper.…”

Section: Hardware Setupmentioning

confidence: 99%

“…fire brigades and disaster relief teams. A novel approach for a non-destructive in-situ wide band material characterization in the range of 60 GHz utilizing a retroreflector was presented in [1]. The proposed method is based on the ellipsometry, which is an established optical material characterization procedure.…”

Section: Introductionmentioning

confidence: 99%

“…With the proposed method the permittivity of large smooth objects can be calculated with an error of under 5 %, but for complex objects the diffraction effects of the boundary has to be considered as well as for rough surfaces the roughness has to be estimated for a precise permittivity estimation. In this paper a merged method for the estimation of the permittivity of a target based on [1] and the image of a target under test is presented. Thus, in this paper an imaging method based on the detected time of flight is employed for the generation of the target's image.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Polarimetric imaging method for a surface adaptive permittivity estimation for 60 GHz FMCW Radar

Friederich

Damyanov

Schultze

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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The chaining of imaging techniques with material characterization capabilities is a very promising approach in the field of security applications. In this paper a polarimetric measurement setup which combines the advantages for imaging and material characterization is introduced. In the herein developed novel set-up the disadvantage of a bistatic configuration is overcome by the implementation of a retroreflector, allowing measurements applying a low-cost, single chip radar. This method is the basis for the combination of material characterization and imaging of targets with rough surface. Furthermore, a modified real time capable convergence algorithm based on [9] is proposed for the purpose of accurate imaging of rough objects. For the validation of this technique polarimetric measurements of real and rough objects are performed and the benefit of the polarimetric evaluation is shown.

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Section: A Microwave Retroreflector Ellipsomety (Mre)mentioning

confidence: 99%

Section: Hardware Setupmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Polarimetric imaging method for a surface adaptive permittivity estimation for 60 GHz FMCW Radar

Friederich

Damyanov

Schultze

et al. 2016

2016 10th European Conference on Antennas and Propagation (EuCAP)

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“…Improving this performance is not only beneficial for well-known applications, such as device characterization [6]- [8] as well as distance and velocity measurements [1], [9], [10], but it also enables various new fields of application. These new fields are, e.g., material characterization [11], [12], biomedical sensing [13], [14], security [2], [12], and plasma diagnostics [15].…”

mentioning

confidence: 99%

A Low-Noise Transmission-Type Yttrium Iron Garnet Tuned Oscillator Based on a SiGe MMIC and Bond-Coupling Operating up to 48 GHz

Delden

Pohl

Aufinger

et al. 2019

IEEE Trans. Microwave Theory Techn.

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Wideband and low-noise tunable oscillators at microwave frequencies are crucial within microwave frequency synthesizers and key to high-end measurement systems based on electromagnetic sensing in the microwave range as well as in the terahertz (THz) and sub-THz range. This paper presents a novel, wideband, and low-noise differential yttrium iron garnet (YIG) tuned oscillator. It is based on a SiGe monolithic microwave integrated circuit and a transmission-type YIG resonator. The integrated circuit contains a fully differential amplifier as a part of the oscillator core. The resonator was realized by two orthogonal, crossed pad-to-pad bonds and an YIG sphere, which is positioned between those bonds and the integrated circuit. To design and optimize the oscillator, an equivalent circuit modeling the resonator was developed. Concerning the tuning range and the phase noise, the results of the circuit simulations are in good agreement with the measurements. Two oscillators with different lengths of the inductive load transmission line were realized. First, the oscillator with a short transmission line offers very high-oscillation frequencies with a tuning range from 32.0 to 48.2 GHz. It exhibits an excellent phase noise of less than −119 dBc/Hz at an offset frequency of 100 kHz for oscillation frequencies up to 42 GHz. Second, the oscillator with a longer transmission line length offers a tuning range from 19.1 to 41.4 GHz. This configuration exhibits an excellent phase noise of less than −120 dBc/Hz at an offset frequency of 100 kHz for oscillation frequencies up to 38 GHz. Index Terms-Low noise source devices, microwave and millimeter wave oscillators, SiGe HBT circuits, ultra-wideband sources devices, yttrium iron garnet (YIG). I. INTRODUCTION M ICROWAVE frequency synthesizers are key to high-end measurement systems based on electromagnetic (EM)

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A new concept to compensate the loop gain variation in phase-locked loops for wideband microwave frequency ramp synthesis

Delden

Pohl

Musch

2017

2017 IEEE Asia Pacific Microwave Conference (APMC)

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A Novel Approach for Material Characterization Based on a Retroreflector Wide Band Transceiver Radar

Cited by 10 publications

References 8 publications

Polarimetric imaging method for a surface adaptive permittivity estimation for 60 GHz FMCW Radar

Polarimetric imaging method for a surface adaptive permittivity estimation for 60 GHz FMCW Radar

A Low-Noise Transmission-Type Yttrium Iron Garnet Tuned Oscillator Based on a SiGe MMIC and Bond-Coupling Operating up to 48 GHz

A new concept to compensate the loop gain variation in phase-locked loops for wideband microwave frequency ramp synthesis

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