Efficient DRW antenna for quasi‐optics feed in W‐band imaging radiometer system

Kim, Won‐Gyum; Thakur, Jay Prakash; Kim, Yong‐Hoon

doi:10.1002/mop.25107

Cited by 8 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The dielectric rod was constructed by the same material as lens dielectric. The design of the DRW antenna probe has been described in details . The output of the BWT was coupled via an attenuator to a pin‐diode waveguide modulator.…”

Section: Measurements and Resultsmentioning

confidence: 99%

Experimental verification 3D subwavelength resolution beyond the diffraction limit with zone plate in millimeter wave

Minin

2014

Micro & Optical Tech Letters

View full text Add to dashboard Cite

The results of experimental investigations of resolution power of millimeter‐wave phase reversal binary Fresnel zone plate with short focal distance F≤2λ are described. It has been experimentally shown that in the near‐field of single diffractive lens with subwavelength focal distance F≤λ without the immersion medium a resolution of 0.3–0.4 λ were obtained. The “Abbe barrier” can be completely broken by such diffractive lenses with unique three‐dimensional super resolution. Also it was experimentally shown the focal spot in the high numerical aperture diffractive lenses is no longer an Airy pattern and focal intensity distribution is not circularly symmetric. © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:2436–2439, 2014

show abstract

Section: Measurements and Resultsmentioning

confidence: 99%

Experimental verification 3D subwavelength resolution beyond the diffraction limit with zone plate in millimeter wave

Minin

2014

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…We developed modified tapered dielectric rod waveguide (DRW) antenna [15] as shown in Figure 1(a), for the efficient use as a feed element in antenna array. Using this feed antenna, we developed an efficient and high performance 30 element feed linear array as shown in Figure 1(b) for quasi optical passive imaging system based on focal plane array (FPA).…”

Section: Introductionmentioning

confidence: 99%

Optical Performance Analysis Using a Point Spread Function and Modulation Transfer Function for W-Band PMMW Imaging System Based on Quasi Optics Focused Array of Dielectric Rod Waveguide Antenna

Singh

Kim²,

Tiwary³

et al. 2010

PIER B

Self Cite

View full text Add to dashboard Cite

Abstract-The appropriateness of dielectric loaded antenna for the passive millimeter wave imaging application has recently been demonstrated. In this paper, we analyze the optical performance of the passive millimeter wave (PMMW) imaging system based on a 1D focal plane array (FPA) of dielectric rod waveguide (DRW) antennas. A first step in the design process is to analyze the image quality potential of 1D FPA-based imaging system in terms of the point spread function (PSF) and the modulation transfer function (MTF). We consider the effect of lens, DRW antenna, electromagnetic crosstalk between adjacent DRW antenna elements in the array, and sampling. From simulation and measurement, we found that the image quality in the passive millimeter wave imaging system with a DRW antenna array is less sensitive to electromagnetic crosstalk between antenna elements in the array. The measurements and simulations show that the system is diffraction limited and also closely agrees with the Rayleigh criterion of resolution for diffraction limited optical systems.

show abstract

“…The above mentioned antenna is also simulated using CST electromagnetic simulator. Details of the DRW antenna design have been described in [11]. Simulated and measured return loss of the above mentioned feed antenna is shown in Fig.…”

Section: Drw Antenna Design and Measurementsmentioning

confidence: 99%

Large Aperture Low Aberration Aspheric Dielectric Lens Antenna for W-Band Quasi-Optics

Thakur¹,

Kim²,

Kim³

2010

PIER

Self Cite

View full text Add to dashboard Cite

Abstract-An advanced aspheric and asymmetric large aperture dielectric lens antenna is proposed firstly here for high resolution at Wband frequency. Large aperture and aspheric lens provides minimum focusing error and high resolution in millimeter wave quasi-optics application. To the best of the authors' knowledge we design first time 500 mm large aperture lens for W-band quasi optics application. Near field radiation pattern, beam size and focal length of the lens are obtained theoretically and experimentally as well. Dielectric rod waveguide antenna is also designed and employed as a source antenna for the lens. The measured and simulated results of the DRW antenna also show very good performance at W-band frequency, and it has 15.3 dB gain with −22.5 dB sidelobe levels at 94 GHz.

show abstract

Efficient DRW antenna for quasi‐optics feed in W‐band imaging radiometer system

Cited by 8 publications

References 5 publications

Experimental verification 3D subwavelength resolution beyond the diffraction limit with zone plate in millimeter wave

Experimental verification 3D subwavelength resolution beyond the diffraction limit with zone plate in millimeter wave

Optical Performance Analysis Using a Point Spread Function and Modulation Transfer Function for W-Band PMMW Imaging System Based on Quasi Optics Focused Array of Dielectric Rod Waveguide Antenna

Large Aperture Low Aberration Aspheric Dielectric Lens Antenna for W-Band Quasi-Optics

Contact Info

Product

Resources

About