A5067683475- Superconducting and THz Device Technology
- Microwave Engineering and Waveguides
- Antenna Design and Optimization
- Radio Astronomy Observations and Technology
- Advanced Antenna and Metasurface Technologies
- Antenna Design and Analysis
- Terahertz technology and applications
- Radio Frequency Integrated Circuit Design
- Thermal Radiation and Cooling Technologies
- Electromagnetic Compatibility and Measurements
- Metamaterials and Metasurfaces Applications
- Electromagnetic Scattering and Analysis
- Photonic and Optical Devices
- Optical Network Technologies
- Scientific Research and Discoveries
- Molecular Spectroscopy and Structure
- Advanced Frequency and Time Standards
- Advanced Thermodynamic Systems and Engines
- Spectroscopy and Laser Applications
- Architecture and Computational Design
- Physics of Superconductivity and Magnetism
- Energy Harvesting in Wireless Networks
- Optical Systems and Laser Technology
- Atmospheric Ozone and Climate
- Advanced Photonic Communication Systems
Delft University of Technology
2013-2020
Huawei Technologies (Germany)
2020
Ankara University
2011-2012
Yıldız Technical University
2010-2011
Future astrophysics and cosmic microwave background space missions operating in the far-infrared to millimetre part of spectrum will require very large arrays ultra-sensitive detectors combination with high multiplexing factors efficient low-noise low-power readout systems. We have developed a demonstrator system suitable for such applications. The combines 961 pixel imaging array based upon Microwave Kinetic Inductance Detectors (MKIDs) capable reading out all pixels simultaneously only one...
Terahertz spectrometers with a wide instantaneous frequency coverage for passive remote sensing are enormously attractive many terahertz applications, such as astronomy, atmospheric science, and security. Here we demonstrate wide-band spectrometer based on single superconducting chip. The chip consists of an antenna coupled to transmission line filterbank, microwave kinetic inductance detector behind each filter. Using division multiplexing, all detectors read-out simultaneously, creating...
In millimeter and submillimeter-wave radiometric imaging systems, a persistent goal is the increase in speed of acquisition image while maintaining high sensitivity. Typically, highest sensitivity achieved by cryogenically cooling detectors, specifically astronomical applications. However, for purpose low-cost applications, it desirable to operate at room temperature. Without cooling, electronic noise introduced detectors becomes dominant, making less sensitive. Resorting detection...
A broadband reflector feed is presented, which consists of a dielectric extended hemispherical lens fed by connected array leaky-wave slots. The slot elements are coherently combined to generate directive radiation patterns that mostly illuminate the central part lens, most efficient one. capable producing secondary with almost constant -10 dB beamwitdh over 3:1 bandwidth. This allows illumination wide frequency range. Performance estimated in terms amplitude taper and phase error losses at...
This paper presents the design and measurements of a wideband dual polarized leaky lens antenna suitable for tightly spaced focal plane arrays. The is composed two crossed slots fed by orthogonal microstrips to realize dual-polarization operation. are differentially in order couple radiation into slots. then coupled dielectric achieve directive patterns suited feeding large Focal distance Diameter ratio reflectors. In this paper, proposed optimized high aperture efficiency with clean...
Next generation sub-mm imaging instruments require kilo-pixel focal plane arrays filled with background limited detectors. Microwave kinetic inductance detectors (MKIDs) are a state-of-the-art detector for future due to their inherent multiplexing capabilities. An MKID consists of superconducting resonator coupled feed-line that is used readout. In the device presented here radiation coupling achieved by directly planar antenna. The antenna placed in focus an extended hemispherical lens...
We present the design, fabrication, and full characterisation (sensitivity, beam pattern, frequency response) of a background limited broadband antenna coupled kinetic inductance detector covering range from 1.4 to 2.8 THz. This device shows photon noise performance with equivalent power 2.5 × 10−19 W/Hz1∕2 at 1.55 THz can be easily scaled kilo-pixel array. The measured optical efficiency, response match very well simulations.
Large ultrasensitive detector arrays are needed for present and future observatories far infrared, submillimeter wave (THz), millimeter astronomy. With increasing array size, itis increasingly important to control stray radiation inside the chips themselves, surface wave. We demonstrate this effect with focal plane of 880 lens-antenna coupled microwave kinetic inductance detectors (MKIDs). Presented here near field measurements MKID optical response versus position on a reimaged source. that...
A new metamaterial topology, called triangular-shaped single-loop resonator (SLR), is introduced with two distinct μ-negative (MNG) regions and one ε-negative (ENG) region over the S/C frequency bands. Transmission reflection characteristics of suggested subwavelength are analyzed using full-wave electromagnetic solvers, Ansoft HFSS CST Microwave Studio (MWS), to demonstrate presence four closely located resonance frequencies within 3.3-5.1 GHz range. Effective permittivity permeability...
This paper deals with the parametric analysis and proper design of parabolic reflector antennas to obtain pencil-beam, cosecant-squared inverse radiation patterns for air coastal surveillance radars. A novel is introduced both pencil-beam by using same modified antenna structure fed an H-plane horn feeder which can be adjusted as symmetric or asymmetric changing bottom flare angle. The analytical regularization method (ARM) used a fast accurate way solve problem E-polarized wave diffraction...
The aim of this reported work is to demonstrate the feasibility a miniaturised four-band metamaterial resonator which has potential use in design multiband microwave devices such as mobile phone patch antennas. suggested topology called hybrid-shaped single-loop (HSLR) its unit cell formed by combination square-shaped and triangular-shaped sections single piece metal loop printed on planar low-loss dielectric substrate. performance novel HSLR structure investigated comparison circular,...
In this study, the authors examine properties of a broadband array leaky‐wave slots located in focal plane an extended hemispherical dielectric lens, to generate several independent beams for imaging applications. The performance is investigated over 4:1 band. Parametric analyses are performed by varying extension length lens and off‐axis distance feed point. results these provide useful guidelines design. A spectral domain approach used characterise field generated array, while numerically...
We present the design, fabrication and characterisation of a broadband leaky lens antenna for broadband, spectroscopic imaging applications. The is designed operation in 300-900 GHz band. integrate directly into an Al-NbTiN hybrid MKID to measure beam pattern absolute coupling efficiency at three frequency bands centred around 350, 650 850 GHz, covering full find aperture $\eta_{ap} \approx 0.4$ over whole band, limited by reflections. good match with simulations both patterns efficiency,...
The Terahertz (THz) band is the portion of spectrum that covers a frequency range from 300 GHz to 3 THz. potential this has been proven for numerous type applications including medical imaging, non-destructive testing, space observation, spectroscopy and security screening, thanks its good compromise between spatial resolution penetration. Most these demand high images, as well fast acquisition time. To fulll such requirements, focal plane arrays (FPAs) need comprise large number elements be...
There is an increasing demand for large format detector arrays with bandwidths and high antenna efficiencies future THz astronomical radiometric applications. For direct detection instruments, it also desired to have antennas dual polarization reception in order increase the received power from incoherent sources, thereby improving observing speed of instrument. The main goal this work validation two orthogonal polarizations by a leaky lens antenna, coupled single microwave kinetic...
In this paper, radiation characteristics of H-plane horn antenna are investigated for different structural parameters such as, waveguide width, length, flare angle, wall thickness, and source position. The ARM procedure is used the 2D analysis as a fast, accurate stable numerical technique. algorithm firstly verified with analytical data testing calculation errors. effects fundamental radiator shown in near far field performance results.
With increasing array size, it is increasingly important to control stray radiation inside the detector chips themselves. We demonstrate this effect with focal plane arrays of absorber coupled Lumped Element microwave Kinetic Inductance Detectors (LEKIDs) and lens-antenna distributed quarter wavelength Microwave (MKIDs). In these response from a point source at pixel position similar level integrated over entire chip area. For antenna arrays, we show that can be suppressed by incorporating...
This contribution presents the design of a dual polarized leaky lens antenna. antenna is fed by CPW, which will make part Kinetic Inductance Detector (KID) in order to enable broadband THz detector for future space applications. A parametric study on geometry has also been performed means varying extension length and it optimized achieve optimum aperture efficiency. The designed high efficiency clean symmetric patterns both polarizations.
The design of a dual polarized Leaky Lens Antenna is discussed. Its performance in case two possible feeding structures consisting either microstrip or coplanar waveguide examined. aperture efficiency optimised by means parametric study concerning variable extension lengths. LLA shows high and clean symmetric patterns both polarisations. resulting antenna intended to be integrated with Kinetic Inductance Detector, this approach yielding broadband THz detector potential for future space applications.
Microwave Kinetic Inductance Detectors (MKIDs) are becoming a very promising candidate for next generation imaging instruments the far infrared. A MKID consists of superconducting resonator coupled to feed-line used readout. In devices presented here radiation coupling is achieved by directly planar antenna. The antenna placed in focus an elliptical lens increase filling factor and match efficiently fore-optics. this paper we present design optical performance MKIDs optimized operation at...
We present the development of background limited kinetic inductance detectors (KIDs) for THz astronomy applications to be used in space based observatories. The radiation is coupled KID via a leaky wave antenna covering frequency range from 1.4 2.8 THz. have developed hybrid niobium titanium nitride/aluminium (NbTiN/Al) KID, fabricated on silicon (Si) substrate, which and absorbing section are suspended nitride (SiN) membrane. with Si lens placed top it at distance 3μm. observe photon noise...
This contribution presents the design of a dual polarized leaky lens antenna coupled to Kinetic Inductance Detector (KID) in order enable broadband THz detector for future space applications. The designed high aperture efficiency and clean symmetric patterns.