EXPERIMENTAL AND THEORETICAL STUDY OF WIDE-BAND SPIRAL ANTENNA MINIATURIZATION VIA MATERIAL AND LUMPED ELEMENT LOADINGS

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" EXPERIMENTAL AND THEORETICAL STUDY OF WIDE-BAND SPIRAL ANTENNA MINIATURIZATION VIA MATERIAL AND LUMPED ELEMENT LOADINGS "

Document Type	:	Latin Dissertation
Language of Document	:	English
Record Number	:	149356
Doc. No	:	ET21148
Main Entry	:	Ming Lee, M.S.
Title Proper	:	EXPERIMENTAL AND THEORETICAL STUDY OF WIDE-BAND SPIRAL ANTENNA MINIATURIZATION VIA MATERIAL AND LUMPED ELEMENT LOADINGS
Note	:	This document is digital این مدرک بصورت الکترونیکی می باشد
Abstract	:	Spiral antennas are of great interest for many broadband applications because oftheir inherent large bandwidth. This dissertation explores novel techniques for re-ducing size of conformal antennas with particular emphasis on spirals. Specifically,a new scheme based on distributed reactive loads is developed for concurrent controlof the spiral impedance and wave velocity, without increasing the antenna volume.We also show that a properly terminated spiral element with material and absorberloading can achieve 0 dBi realized gain even when its size is only 0.15 ق per sideand /ق20 in height at the lowest operational frequency (with ground plane backing),which is 3 times smaller than previous publications. The proposed size reductiontechniques were adapted to develop a ground plane-backed six-element L-band spiral.
Subject	:	Electericl tess
	:	برق
electronic file name	:	TL44297.pdf
Title and statement of responsibility and	:	EXPERIMENTAL AND THEORETICAL STUDY OF WIDE-BAND SPIRAL ANTENNA MINIATURIZATION VIA MATERIAL AND LUMPED ELEMENT LOADINGS [Thesis]