Scaled Bistatic Radar Cross Section Measurements of Aircraft With a Fiber-Coupled THz Time-Domain Spectrometer

Gente, R.; Jansen, Christian; Geise, Robert; Peters, Ole; Gente, M.; Krumbholz, N.; Möller, Christoph; Busch, Stefan; Koch, Martin

doi:10.1109/tthz.2012.2192929

Cited by 38 publications

(20 citation statements)

References 10 publications

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“…The RCS characteristics of the sample are measured through a broad-band time domain THz RCS system32333435. The full width of the beam is 92 mm, the distance between the incident parallel wave and the target object is 1670 mm, and the distance between the scattered THz wave and the detector is 1410 mm.…”

Section: Resultsmentioning

confidence: 99%

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Liu

Wei

Yan

et al. 2016

Sci Rep

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A novel broadband and wide-angle 2-bit coding metasurface for radar cross section (RCS) reduction is proposed and characterized at terahertz (THz) frequencies. The ultrathin metasurface is composed of four digital elements based on a metallic double cross line structure. The reflection phase difference of neighboring elements is approximately 90° over a broadband THz frequency. The mechanism of RCS reduction is achieved by optimizing the coding element sequences, which redirects the electromagnetic energies to all directions in broad frequencies. An RCS reduction of less than −10 dB bandwidth from 0.7 THz to 1.3 THz is achieved in the experimental and numerical simulations. The simulation results also show that broadband RCS reduction can be achieved at an incident angle below 60° for TE and TM polarizations under flat and curve coding metasurfaces. These results open a new approach to flexibly control THz waves and may offer widespread applications for novel THz devices.

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Section: Resultsmentioning

confidence: 99%

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Liu

Wei

Yan

et al. 2016

Sci Rep

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“…Since it is not alway convenient to make the measurement in real life: the structure might not be accessible, or not even yet built, radar range has been used as an effective technique to predict the RCS 1 – 4 . Furthermore, by taking advantage of the scale invariance of the Maxwell’s equations for electromagnetic wave propagation, it is possible to make the radar range much compact than full scale 5 .…”

Section: Introductionmentioning

confidence: 99%

A 300 THz tabletop radar range system with sub-micron distance accuracy

Blanche

Neifeld

Tuo

et al. 2018

Sci Rep

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We are presenting a compact radar range system with a scale factor of 105. Replacing the radio frequency (RF) by optical wavelength (300 THz), the system easily fit on a tabletop. We used interferometric time-of-flight to reproduce radar ranging measurements. Sub-micron range accuracy was achieved with a 100 fs laser pulse, which correspond to 3 cm for a s-band (3 GHz) radar. We demonstrated the system potential on a simple target, and compared the results with radio frequency measurement using a vector network analyzer. We also present measurement with a more realistic model, a 3D printed reproduction of the USS Arizona battleship, for which a 3D model is extracted from the ranging data. Together with our previous demonstration of radar cross section measurement with a similar system, this report further validates our proposal to use optics to simulate radar properties of complex radio frequency systems.

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“…Electromagnetic scattering from spheres had been studied universally because of its inherent symmetry and its agreement in shape with many natural objects. The researchers in radar community treat the metallic sphere as a reference for radar cross section (RCS) measurement because the metallic sphere is symmetrical and its RCS value is known [2,17]. In terahertz band, the metallic sphere's accurate RCS should be evaluated renewedly because of the frequency dispersion of metals.…”

Section: Introductionmentioning

confidence: 99%

Radar cross section of arbitrary polished spheres at terahertz frequencies

2017

Journal of Systems Engineering and Electronics

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We develop an efficient method for polished metallic sphere's scattering prediction in terahertz band when its frequency dispersion property is considered. By deducing scattering solution of the lossy metallic sphere, the radar cross section (RCS) of different metallic spheres is given at terahertz frequencies. The investigation of the RCS of polished metallic spheres shows the normalized RCS is always same to the metals' normal incidence reflectivity when the sphere becomes electrically large. The metals which have high reflectivity (such as Al, Cu, Ag and Au) show that the corresponding RCS of the spheres is almost πa 2 in terahertz band. The sphere's RCS of the transition metal such as Fe begins to decrease obviously since the far infrared.

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Scaled Bistatic Radar Cross Section Measurements of Aircraft With a Fiber-Coupled THz Time-Domain Spectrometer

Cited by 38 publications

References 10 publications

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

Broadband and wide-angle RCS reduction using a 2-bit coding ultrathin metasurface at terahertz frequencies

A 300 THz tabletop radar range system with sub-micron distance accuracy

Radar cross section of arbitrary polished spheres at terahertz frequencies

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