نتایج جستجو برای: ku and ka band

تعداد نتایج: 16850046  

2008
J. M. McArthur P. Ravenscroft D. M. Banerjee J. Milsom K. A. Hudson-Edwards S. Sengupta C. Bristow A. Sarkar S. Tonkin R. Purohit

In the Bengal Basin, the land surface exposed during the last lowstand of sea-level around 20 ka, and now buried by Holocene sediment, is capped by an impermeable clay palaeosol that we term the Last Glacial Maximum Palaeosol (LGMP). The palaeosol strongly affects groundwater flow and controls the location of arsenic pollution in the shallow aquifers of our study site in southern West Bengal an...

2017
Katrin Heimann Riccardo Fusaroli Sergio Gonzalez de La Higuera Rojo Niels Nørkjær Johannsen Felix Riede Nicolas Fay Marlize Lombard Kristian Tylén

Dating back as far as 100 ka, the Blombos ochre and the Diepkloof ostrich egg engravings are considered among the earliest fossilized evidence of human symbolic behavior. Of special interest to this study is the temporal trajectory spanning more than 30 thousand years from earlier simpler parallel line patterns to later complex cross-hatchings suggesting adaptive compositional development. Thro...

Journal: :IEEE Trans. Instrumentation and Measurement 2001
Zulkifly Abbas Roger D. Pollard Robert W. Kelsall

The rectangular dielectric waveguide (RDWG) technique has been developed for the determination of the dielectric constant of materials from effective refractive index measurements in the Q and W bands. This paper describes the use of an optimization method in conjunction with the RDWG technique for the determination of both the dielectric constant and loss tangent of materials at Ka-Band. The e...

2013
Sarthak Singhal

A design of microstrip patch antenna gap coupled with two parasitic elements on its non-radiating edges and a single parasitic element on its radiating edge for the operation in X band and Ku band is proposed here. The parasitic elements are partially shorted. This design is giving an impedance bandwidth of 4.967GHz. This antenna is operating over a frequency range of 11.2334 to 16.0431 GHz wit...

1994
Andreas Wirzba

1 Correction to the Airy Approximation In Ref..1] and especially in Franz and Galle 2] one can nd correction terms to order O((ka) ?5=3) to the standard Airy approximation of the zeros l of the Hankel function H (1) (ka) in the complex-plane 1 : l = ka + e ii=3 (ka)

Journal: :Combinatorics, Probability & Computing 2009
Javier Cilleruelo Yahya Ould Hamidoune Oriol Serra

Let k be a positive integer and let A ⊂ Z. We let k · A = {ka : a ∈ A} denote the k-dilation of A, and let kA = A+ · · ·+ A (k-times) be the k-fold sumset of A. We observe that A+ k · A ⊂ A+ kA = (k + 1)A and that, in general, A+ k · A is much smaller than (k + 1)A. It is well known that |(k + 1)A| (k + 1)|A| − k, and that equality holds only if A is an arithmetic progression. Indeed, if A is a...

Journal: :Indonesian Journal of Electrical Engineering and Computer Science 2020

Background and Objectives: In this paper, a new design strategy was proposed in order to enhance bandwidth and efficiency of power amplifier. Methods: To realize the introduced design strategy, a power amplifier was designed using TSMC CMOS 0.18um technology for operating in the Ka band, i.e. the frequency range of 26.5-40GHz. To design the power amplifier, first a power divider (PD) with a ver...

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