Aspherical single-lens objective for radio-vision systems of the millimeter-wavelength range

Volkov, P.; Belov, Yu. I.; Goryunov, A. V.; Illarionov, I. A.; Serkin, A. G.; Shashkin, V. I.

doi:10.1134/s1063784214040264

Cited by 5 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The asymmetrical aspherical shape provides low aberration, hence the small size of the focal spot. A spot size of about 4 mm was experimentally evaluated [ 31 ], which makes it possible to achieve high resolution of imaging.…”

Section: 1 × 3 Array Imaging Systemmentioning

confidence: 99%

Millimeter-Wave Imaging System Based on Direct-Conversion Focal-Plane Array Receiver

Korolyov

Goryunov

Illarionov

et al. 2022

Sensors

View full text Add to dashboard Cite

A new approach to millimeter-wave imaging was suggested and experimentally studied. This approach can be considered as the evolution of the well-established focal-plane array (FPA) millimeter-wave imaging. The significant difference is the use of a direct-conversion array receiver, instead of the direct-detection array receiver, along with the frequency-modulated continuous-wave (FMCW) radar technique. The sensitivity of the direct-conversion receiver is several orders higher than the sensitivity of the direct-detection one, which allows us to increase the maximum imaging range by more than one order of magnitude. The additional advantage of the direct-conversion technique is the opportunity to obtain information about the range to an object. The realization of the direct-conversion FPA imaging system was made possible due to original sensitive simple-designed receiving elements based on low-barrier Mott diodes. The suggested imaging method’s main characteristics, which include the achievable angular and range resolution and the achievable maximum imaging range, were studied. A maximum range of up to 100 m was experimentally determined. A 94 GHz 8 × 8 imaging system was developed for demonstration purposes and studied in detail. The suggested technique is assumed to be useful for creating a long-range millimeter-wave camera, in particular, for robotic systems that operate in poor environmental conditions.

show abstract

Section: 1 × 3 Array Imaging Systemmentioning

confidence: 99%

Millimeter-Wave Imaging System Based on Direct-Conversion Focal-Plane Array Receiver

Korolyov

Goryunov

Illarionov

et al. 2022

Sensors

View full text Add to dashboard Cite

show abstract

“…Then the incident field at P 2 is given bȳ (8) whereĒ i 1v andĒ i 1p are the components ofĒ i 1 which are perpendicular and parallel to the incident plane respectively; T 1v and T 1p are the Fresnel transmission coefficients at P 1 ; R 12 is the distance between P 1 and P 2 ; L εr is the dielectric loss of the lens, which can be obtained as follow [14] L εr = 10 − 27. 3·R 12 20λ ·tan δ· n n−1 (9) in which n is the index of refraction, tan δ the loss tangent of the medium, and λ the wave length. DF 1 is the divergence factor of the ray and expressed as…”

Section: Numerical Analysis Of Quasi-opticsmentioning

confidence: 99%

“…Previous works have demonstrated various design methods of quasi-optical lens [7][8][9][10]. Most of the lenses were designed on the basis of equivalent optical path condition and optimized by ray-tracing method.…”

Section: Introductionmentioning

confidence: 99%

Optimized Design of W-Band Quasi-Optical Lens by Using Optical Simulator and Numerical Analysis

Chen¹,

Yang²,

Song³

2016

PIER M

View full text Add to dashboard Cite

Abstract-A large aperture quasi-optical dielectric lens antenna for passive imaging at W-band frequency is proposed. The lens is designed to obtain best resolution at a designate distance of 3.5 m from it. The lens has biconvex aspheric surface to achieve low aberration. The initial parameters of the optical path are obtained with Gaussian beam method, and then the optical simulator ZEMAX is applied to optimize the shape of the lens which improves design efficiency greatly. A hybrid numerical method is used to analyze near field distribution of the lens, and the final design of the lens is evaluated and determined by the results. The method is the combining of ANSOFT HFSS software, ray tracing method and integration algorithm based on Huygens' Principle. It is feasible and efficient for the analysis of various lens antennas, such as large aperture lens antennas which are difficult to be simulated by commercial electromagnetic simulation software. The lens is fabricated with HDPE. Experimental results show that its 3 dB beam size is 29 mm at distance of 3.5 m, which is in good agreement with theoretical calculation. The measured patterns on the image plane show that the lens has 0.3 dB decrease of field intensity in field view of 690 mm. Imaging result shows that the lens is a good candidate for focal plane imaging.

show abstract

Millimeter-continuous-wave radar for creating array imaging system with higher range

Korolyov

Shikov

Паршин

2020

2020 7th All-Russian Microwave Conference (RMC)

View full text Add to dashboard Cite

Aspherical single-lens objective for radio-vision systems of the millimeter-wavelength range

Cited by 5 publications

References 8 publications

Millimeter-Wave Imaging System Based on Direct-Conversion Focal-Plane Array Receiver

Millimeter-Wave Imaging System Based on Direct-Conversion Focal-Plane Array Receiver

Optimized Design of W-Band Quasi-Optical Lens by Using Optical Simulator and Numerical Analysis

Millimeter-continuous-wave radar for creating array imaging system with higher range

Contact Info

Product

Resources

About