Results 241 to 250 of about 27,684 (298)
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2007 SBMO/IEEE MTT-S International Microwave and Optoelectronics Conference, 2007
This paper deals with a microstrip antenna that has a spiral geometry rectangular form. This antenna form is based on the analysis of a spiral monopole. Through such configuration, it is possible to obtain a wider bandwidth operation. In addition, a considerable bandwidth in this type of microstrip is verified.
Dinisio Raony Ribeiro +4 more
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This paper deals with a microstrip antenna that has a spiral geometry rectangular form. This antenna form is based on the analysis of a spiral monopole. Through such configuration, it is possible to obtain a wider bandwidth operation. In addition, a considerable bandwidth in this type of microstrip is verified.
Dinisio Raony Ribeiro +4 more
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2019 IEEE International Symposium on Antennas and Propagation and USNC-URSI Radio Science Meeting, 2019
The paper presents the bow-spiral antenna, a hydride design which integrates the geometry structure of an exponential bow-tie into an Archimedean spiral antenna in order to reduce its high input impedance.
Thi M. D. Tran, Marc Piette
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The paper presents the bow-spiral antenna, a hydride design which integrates the geometry structure of an exponential bow-tie into an Archimedean spiral antenna in order to reduce its high input impedance.
Thi M. D. Tran, Marc Piette
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IEEE Antennas and Propagation Magazine, 2001
When compared to printed cavity-backed spirals, slot spiral antennas offer the possibility of designs that are conformal and very thin. We discuss the physical characteristics of a cavity-backed slot spiral, as well as the associated infinite balun and termination designs.
J.L. Volakis +2 more
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When compared to printed cavity-backed spirals, slot spiral antennas offer the possibility of designs that are conformal and very thin. We discuss the physical characteristics of a cavity-backed slot spiral, as well as the associated infinite balun and termination designs.
J.L. Volakis +2 more
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IEEE Antennas and Wireless Propagation Letters, 2011
Conventional spiral antennas radiate either a left-handed circularly polarized (CP) wave or a right-handed CP wave in a specific direction (single CP radiation). This letter presents a novel spiral antenna, designated as the metamaterial spiral, which radiates a dual CP wave.
H. Nakano +3 more
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Conventional spiral antennas radiate either a left-handed circularly polarized (CP) wave or a right-handed CP wave in a specific direction (single CP radiation). This letter presents a novel spiral antenna, designated as the metamaterial spiral, which radiates a dual CP wave.
H. Nakano +3 more
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Low-Dispersion Spiral Antennas
IEEE Transactions on Antennas and Propagation, 2012A two-arm power spiral antenna with inherently low dispersion is proposed. Analytical, computational, and experimental steps are taken to demonstrate its superior time domain performance. When compared with conventional Archimedean and equiangular spirals, up to 40% improved fidelity factor and pulse compression are achieved.
M. A. Elmansouri, D. S. Filipovic
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IEE Proceedings H Microwaves, Antennas and Propagation, 1991
Two types of dual-spiral slot antennas characterised by their simple feed are studied; one is a bidirectional radiation type (Bi-DSS) and the other is a unidirectional type (Uni-DSS). The radiation characteristics of the Bi-DSS are evaluated using the numerically determined magnetic current distribution.
K. Hirose, H. Nakano
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Two types of dual-spiral slot antennas characterised by their simple feed are studied; one is a bidirectional radiation type (Bi-DSS) and the other is a unidirectional type (Uni-DSS). The radiation characteristics of the Bi-DSS are evaluated using the numerically determined magnetic current distribution.
K. Hirose, H. Nakano
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1979 9th European Microwave Conference, 1979
The cavity backed spiral antenna with a square configuration is described. It is shown that with continual development and an invention of a unique design of cavity the aperture of this type of antenna is reduced to approximately 0.1? square at its lowest operating frequency.
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The cavity backed spiral antenna with a square configuration is described. It is shown that with continual development and an invention of a unique design of cavity the aperture of this type of antenna is reduced to approximately 0.1? square at its lowest operating frequency.
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2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET), 2018
The main results of numerical simulation of the characteristics of a spiral antenna with small number of turns and peripheral feeding by a coplanar waveguide are presented. The features of this antenna are: its wideband parameters, both in terms of input impedance and directional characteristics, as well as small geometric dimensions.
Serhii Siden +2 more
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The main results of numerical simulation of the characteristics of a spiral antenna with small number of turns and peripheral feeding by a coplanar waveguide are presented. The features of this antenna are: its wideband parameters, both in terms of input impedance and directional characteristics, as well as small geometric dimensions.
Serhii Siden +2 more
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1998 Symposium on Antenna Technology and Applied Electromagnetics, 1998
Recently, we have analyzed a spirally-wound antenna [1][2] proposed by Fenwick using the method of moments. The analysis shows that the. input impedance is very low (less than 4 ohms). It is also shown that the frequency bandwidth is very narrow (less than 0.2% for a criterion of VSWR = 2 to an input resistance at resonance).
H. Nakano +4 more
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Recently, we have analyzed a spirally-wound antenna [1][2] proposed by Fenwick using the method of moments. The analysis shows that the. input impedance is very low (less than 4 ohms). It is also shown that the frequency bandwidth is very narrow (less than 0.2% for a criterion of VSWR = 2 to an input resistance at resonance).
H. Nakano +4 more
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UWB filter-antenna using Spiral Resonator
2010 Loughborough Antennas & Propagation Conference, 2010This paper presents simple and low cost implementations of very wideband antennas using Spiral Resonator (SR) to perform band-rejection filtering within the band. Details on SR design are first given and filter design is then applied on a UWB antenna to filter the WLAN band.
Le Fur, Gwenn, Sharaiha, Ala
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