Multi-polarized spiral antennas for rf sensing by w neill kefauver bsee, virginia polytechnic and state university, l983 msee, virginia polytechnic and state university, l984 a thesis submitted to the faculty of the graduate school of the university of colorado in partial. Analysis of the equiangular spiral antenna a thesis presented to the academic faculty by michael mcfadden in partial fulfillment of the requirements for the degree doctor of philosophy in the school of electrical and computer engineering georgia institute of technology december 2009. Projection of the four-arm spiral antenna compared to other antenna designs and the ability to be manufactured in a planar format allows the antenna to reside within an unmanned air vehicle (uav) fuselage this thesis investigates the effects of cylindrically-conforming two different designs of a four-arm. Recently the use of spiral antennas with conducting ground planes has become more popular these types of spirals have more gain but the axial ratio and pattern bandwidths are drastically reduced compared to spirals backed by lossy cavities most of the spiral element and array simulations in this thesis will be simulated. This article discusses a low-cost cavity backed coplanar-waveguide to coplanar- strip fed logarithmic uniplanar spiral antenna that covers a 9:1 bandwidth with a return loss better than 10 db from 04 to 38 ghz the ie3d computer program is used to predict the performance of the spiral antenna in terms of radiation pattern.
Design and analysis of star spiral with application to wideband array with variable element sizes eric d caswell (abstract) this dissertation details the development of the star spiral antenna and demonstrates the advantages of the star spiral when used in a wideband array with variable element sizes. Design of an ultra-wideband spiral antenna for ground- penetrating microwave impulse radar applications a thesis presented to the faculty of california polytechnic state university san luis obispo in partial fulfillment of the requirements for the degree master of science in electrical. At the ohio state univ (electroscience lab), two new students (brad kramer and ming lee) have started their phd thesis on loaded slot spiral antennas with significant development already demonstrated for miniaturization brad kramer has just completed his msc thesis and a paper on this thesis is appended to this.
Anantha p chandrakasan professor of electrical engineering and computer science thesis supervisor accepted by the focus of this thesis is to develop an antenna for the uwb 31-106 ghz band that laboratory, who helped with the fabrication of the spiral antenna with the pcb milling router. A deployable bottom fed conical log-spiral antenna for cubesat applications anthony ernest follow this and additional works at: http://digitalrepositoryunm edu/ece_etds this thesis is brought to you for free and open access by the engineering etds at unm digital repository it has been accepted for.
This thesis presents a novel antenna geometry called the modified two-layered archimedean spiral antenna (mod arspl) with simple coaxial feed without balun which shows improved performance in impedance matching and peak gain compared to the conventional geometry detailed studies are done to identify the. Design of wideband arrays of spiral antennas other supélec, 2013 english hal id: tel-00830469 https://telarchives-ouvertesfr/tel-00830469 submitted on 5 jun 2013 hal is a multi-disciplinary open access archive for the deposit and dissemination of sci- entific research documents, whether they are pub- lished or not.
Curved spiral antennas for underwater biological applications by ruben llamas a thesis submitted in partial fulfillment of the requirements for the doctor of philosophy degree in electrical and computer engineering in the graduate college of the university of iowa may 2015 thesis supervisor:. In this thesis, theoretical and practical evaluation of usual spiral antenna is revised working principles of both types of planar spiral antennas as equiangular and archimedean are introduced a predesigned microstrip tapered balun used for feeding section of a spiral antenna is simulated on ansoft® hfss ™ software.