Results 11 to 20 of about 14,126,310 (342)
The Hawk-I UDS and GOODS Survey (HUGS): Survey design and deep K-band number counts [PDF]
, 2014 We present the results of a new, ultra-deep, near-infrared imaging survey executed with the Hawk-I imager at the ESO VLT, of which we make all the data (images and catalog) public.
A.Fontana +88 more
semanticscholar +15 more sources
Photosynthetica, 2021 The rapid growth and spreading of invasive plant species could be related to their efficient photosynthesis performance. We analysed and compared photosynthetic efficiency of invasive indigo bush (Amorpha fruticosa L.) and noninvasive native Quercus ...
S. MLINARIĆ +6 more
doaj +1 more source
Harmonic Dual-Band Diode Mixer for the X- and K-Bands [PDF]
Journal of Electromagnetic Engineering and Science, 2021 This paper presents a new dual-band diode mixer for the X- and K-bands. The proposed mixer consists of a pair of series-connected diodes and a frequency-dependent delay line that operates at 180° and 360° at the X-band of 10.525 GHz and at the K-band of ...
Jeong Hun Park, Moon-Que Lee
doaj +1 more source
Brazilian Journal of Physics, 2006 High-spin states in the neutron-deficient140Gd nucleus have been studied with the 92Mo(54Fe,a2p) reaction at a beam energy of 240 MeV. The level scheme of 140Gd was considerably extended from what was previously known. In this work we concentrate on one of the 9 bands observed, which presents relatively strong M1 transitions and negligible signature ...
Oliveira, J.R.B. +25 more
openaire +4 more sources
A K-band up/down bidirectional mixer in 130 nm CMOS
Dianzi Jishu Yingyong, 2022 An active bidirectional mixer performing the up/down conversion is proposed at K-band with a 130 nm CMOS in this paper. The mixer performs the down conversion in the Rx mode and converts the radio frequency(RF) signal amplified by low noise amplifier(LNA)
Zhao Yunan +6 more
doaj +1 more source
IEEE Antennas and Wireless Propagation Letters, 2023 This letter presents a concept for a surface exhibiting tunable reflectivity that operates within the K-band using varactor diodes. Thereby, the impedance of a two-layer metasurface is controlled through lumped components at its back side and not at the ...
Christoph Kohlberger +2 more
semanticscholar +1 more source
MYSTIC: a high angular resolution K-band imager at CHARA
Astronomical Telescopes + Instrumentation, 2022 The Michigan Young STar Imager at CHARA (MYSTIC) is a K-band interferometric beam combining instrument funded by the United States National Science Foundation, designed primarily for imaging sub-au scale disk structures around nearby young stars and to ...
B. Setterholm +12 more
semanticscholar +1 more source
Rectenna design for K band application [PDF]
2014 44th European Microwave Conference, 2014 An ultra-compact (2.5 cm 2) rectenna design based on an innovative topology using a coplanar stripline connected to a crossed dipoles antenna array is reported here. Experimental results in the K-band show that a DC power up to 0.9 mW can be harvested on a 0.3 kΩ load by using the proposed compact rectenna for incident power density of 1413 µW/cm 2 ...
Takacs, Alexandru +5 more
openaire +2 more sources
International journal of RF and microwave computer-aided engineering, 2021 The realization and validation of a new reconfigurable metasurface high‐resolution steering reflector for K‐band are presented. The continuous tuning is achieved by integrating a varactor diode with each metasurface unit cell.
D. Rotshild, A. Abramovich
semanticscholar +1 more source
Wideband compact antennafor K-band applications [PDF]
Electronics Letters, 2000 A compact coupled microwave active antenna is presented. This antenna is proximity fed, and consists of a square radiating element array on a polymer dielectric layer. The compactness of the antenna is obtained through technological optical processes and the parasitic patch phenomenon which increases the bandwidth.
Grzeskowiak, Marjorie +2 more
openaire +3 more sources