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IEE Proceedings F Communications, Radar and Signal Processing, 1985
The reason for the popularity of the cavity-backed spiral antenna in ESM systems is discussed, together with the surprising lack of supporting analysis and detailed understanding of its operation. In the absence of any published mathematical analysis of the complete antenna, the function and principle of operation of the three main antenna components ...
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The reason for the popularity of the cavity-backed spiral antenna in ESM systems is discussed, together with the surprising lack of supporting analysis and detailed understanding of its operation. In the absence of any published mathematical analysis of the complete antenna, the function and principle of operation of the three main antenna components ...
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Stripline-Fed Archimedean Spiral Antenna
IEEE Antennas and Wireless Propagation Letters, 2011An inward-fed two-arm Archimedean spiral antenna is proposed, which integrates a stripline feed network into one of the spiral arms. A broadband stripline tapered impedance transformer conformal to the spiral's winding provides a novel matching network between the input impedance of the spiral and the characteristic impedance of the stripline.
null Teng-Kai Chen, G H Huff
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Imbedded spiral antenna for endoscope
International Conference on Information Communication and Embedded Systems (ICICES2014), 2014This paper analyses the characteristics of dual spiral antenna with varying length. This antenna is operated in the lower band of the radio frequency range, since human body absorbs the microwave signals. Here the concept of multilayer substrate is used in order to reduce the size of the antenna. The existing system has several limitations.
Anila P. George, M. Sujatha
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European Transactions on Telecommunications, 1990
AbstractThe Archimedean printed spiral antenna is investigated by numerical methods, usjng the Green's function for stratified media.The integral equation for the current distribution is obtained by imposing the condition of vanishing total electric field tangential to the conducting strip and solved by application of the method of moments.Knowledge of
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AbstractThe Archimedean printed spiral antenna is investigated by numerical methods, usjng the Green's function for stratified media.The integral equation for the current distribution is obtained by imposing the condition of vanishing total electric field tangential to the conducting strip and solved by application of the method of moments.Knowledge of
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Broadband additive spiral antenna
2017 Antenna Measurement Techniques Association Symposium (AMTA), 2017A novel low cost and high performance miniaturized broadband Additive Spiral Antenna (ASA) technology (patent pending) has been developed. Unlike other conventional spiral designs, this new spiral antenna leverages Additive Manufacturing (AM) 3D zig-zag shapes to achieve an efficient slow wave radiation structure for extending spiral's low frequency ...
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Flexible step-impedance spiral antenna
2013 11th International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Services (TELSIKS), 2013In this paper, novel ultra-wideband flexible step-impedance spiral antenna (SIA) is proposed.
Vasa Radonic, Alexander Rusakov
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IEEE Antennas and Propagation Society Symposium, 2004., 2004
A spiral antenna is a radiation element that radiates a circularly polarized (CP) wave over a wide frequency bandwidth. The spiral is often backed by a conducting plane to change the inherently bidirectional beam to a unidirectional one. The radiation pattern has been qualitatively and quantitatively investigated (Nakano, H. 1987; Nakano et al., 1988).
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A spiral antenna is a radiation element that radiates a circularly polarized (CP) wave over a wide frequency bandwidth. The spiral is often backed by a conducting plane to change the inherently bidirectional beam to a unidirectional one. The radiation pattern has been qualitatively and quantitatively investigated (Nakano, H. 1987; Nakano et al., 1988).
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Four-Armed Spiral-Helix Antenna
IEEE Antennas and Wireless Propagation Letters, 2012An antenna formed by the union of a four-armed, reflective-backed spiral antenna with a top-fed quadrifilar helix, operating over the 0.35-2.6-GHz band, is presented. The antenna features a novel dual-layering scheme that allows the modal impedance of the four-armed spiral to be greatly reduced while maintaining the desirable self-complementary ...
M. J. Radway, D. S. Filipovic
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Square Spiral Microstrip Patch Antenna
2019 International Conference on Electrical, Communication, and Computer Engineering (ICECCE), 2019Our project describes the analysis and design of square spiral microstrip patch antenna for multi band frequencies. As compared with old conventional antennae, microstrip patch antennae have more advantages and better prospects. Such antennae are light-weighted, circularly polarized and can be easily fabricated.
Anum Zulqarnain +3 more
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Equiangular microstrip spiral antennas
IEEE Antennas and Propagation Society International Symposium. 1995 Digest, 2002The input impedance and the broadside axial ratio of a perturbed equiangular microstrip spiral antennas are examined. With the perturbation (modification factor /spl delta/) on its shape, the broadside axial ratio of the equiangular spiral can be significantly reduced. A 21% 3-dB axial ratio bandwidth has been observed. The antenna input resistance can
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