archimedean spiral
Design and Analysis of Archimedean Spiral Reconfigurable Antenna
... an Archimedean spiral reconfigurable antenna is presented for wireless communication applications of LTE 33-37, Mobile terminals, industrial, scientific and medical group (ISM), PCS Band, UMTS, Widespread ...
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Design of Planar Archimedean Spiral Antenna for Wi-Max Using Different Materials
... The spiral antenna is a wideband antenna with low profile and circular ...a spiral antenna depends on the physical dimension of the antenna ...planar Archimedean spiral antenna is the class of ...
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A Novel Compact Archimedean Spiral Antenna with Gap-Loading
... and its lower edge frequency is at 2 GHz, which is almost the same with the proposed gap-loading spiral antenna. The radius of the 4 turns Archimedean spiral antenna is 27.5mm and the radius of the ...
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Archimedean spiral antenna on moveable ground plane for UWB applications
... of archimedean spiral antenna with various ground plane combinations are shown in ...the spiral antenna has more than 110% of bandwidth for the entire range of the working frequency at return loss ...
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Archimedean spiral antenna embedded with frequency selective surface for wideband applications
... the Archimedean spiral antenna. Since the spiral antenna belongs to the class of frequency independent antennas, it is easily capable of bandwidth greater than 10:1 ...the spiral an ideal ...
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UWB with Gain Enhancement Archimedean Spiral Microstrip serial Array Antennas for On-board Satellite Communications
... Spiral antenna is widely used in satellite communications due to its wide band frequency response, the circular polarization, and the directive beam ...the spiral radiating elements provides the smooth ...
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Enhanced copy-paste image forgery detection based on archimedean spiral and coarse-to-fine approach
... As mentioned in the problem background section, there are two fundamental and concerning issues in image forgery detection area namely extracting a discriminate robust block feature and improving computational ...
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Archimedean Spiral Antenna with Two Opposite Uni-Directional Circularly Polarized Radiation Bands Designed by Resonance Based Reflectors
... Abstract—Two opposite uni-directional radiation bands with good circular polarization (CP) characteristics are achieved in an Archimedean Spiral Antenna (ASA). A sandwich configuration is formed by utilizing ...
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Analysis of the Active Region of Archimedean Spiral Antenna
... an Archimedean Spiral Antenna backed by a metalic plate has been analysed ...the spiral arm where the effective radiation pattern of the ASA take ...the spiral arm is ...the spiral arm ...
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Archimedean Spiral Antenna with Band-Notched Characteristics
... arm Archimedean spiral slot band notch antenna using the slotted technique is ...The spiral antenna is a circularly polarized radiator antenna with a relatively constant input impedance and radiation ...
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A New Spiral Antenna with Improved Axial Ratio and Shorted Arm Length
... studies, spiral antennas with planar feeding structure have attracted more ...equiangular spiral with a transmission line that follows the metal layer beneath the spiral to the center point is ...
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A Spiral Antenna with Integrated Parallel-Plane Feeding Structure
... the spiral with a transmission line that follows the metal layer beneath the spiral arm to the center point is proposed ...equiangular spiral antenna and achieves axial ratio below 5 dB over the ...
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Proposing and Modeling a 2.4 GHz Antenna for the Endoscopic Capsule Reader
... the spiral antenna, however, has a lower VSWR on the working range of frequencies in comparison to the other types of ...antennas. Archimedean spiral turns increase leads to the broadening of the ...
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Spiral photonic crystal fibers
... different spiral (ES, AS and FS) PCFs with some general results of the effect of varying their parameters on the optical properties of the ...fiber. Archimedean spiral is discussed first then ...
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An organic vortex laser
... an Archimedean spiral grating of subwavelength thickness with a conjugated polymer gain ...the spiral, whilst the conjugated polymer provides high gain in the green region of the ...
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Hecke Groups, Dessins d’Enfants and the Archimedean Solids
... so-called Archimedean solids, we apply this theory in order to provide a means of computing represen- tatives of the associated conjugacy classes of Hecke subgroups in each ...the Archimedean solids, the ...
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Archimedean unital groups with finite unit intervals
... This paper is focused on the study of a unital group G with a finite unit interval E and on the question of just when G is Archimedean (i.e., carries a cone-determining set of states). If G carries a ...
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Stochastic processes on non Archimedean Banach spaces
... 1. Introduction. Stochastic differential equations on real Banach spaces and manifolds are widely used for the solutions of mathematical and physical prob- lems and also for the construction and investigation of measures ...
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On the metric theory of numbers in non-Archimedean settings
... of elements of F q . It is worth keeping in mind that | · | is a non-Archimedean norm, since |α + β| ≤ max(|α|, |β|). Moreover, every ball in the field of formal Laurent series of finite radius is compact. In fact, ...
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Apparent Diffusion Coefficient Mapping Using a Multi Shot Spiral MRI Sequence of the Rat Brain
... A spiral MRI sequence (SPIRAL) allows fast scanning with a relatively high signal-to-noise ratio (SNR), and it is relatively insensitive to motion ...the spiral design of the k-space trajectory ...
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