NDLI: Analysis of Scan Blindness in a Linearly Polarized Tapered-Slot Phased Array in Triangular Lattice—Performance Improvement With Parasitic Notches

Content Provider	IEEE Xplore Digital Library
Author	Zhi Xu Chuanfang Zhang Kaufmann, T. Xuequan Yan Yuan Yuan Fumeaux, C.
Copyright Year	1963
Abstract	Various types of scan blindness are analyzed in a single-polarized tapered-slot phased array with triangular lattice arrangement, and a scan blindness removal strategy is proposed. In the presented analysis, two types of scan blindness are observed which have not been previously reported. First, a special case of parallel plate cavity resonance is demonstrated to cause scan blindness at a fixed frequency for E-plane scanning. Second, another cause for E-plane scan blindness is extended from previous observations, by including the fundamental mode of a half-mode open waveguide. This type of leaky-wave-induced scan blindness is limited to triangular lattices and can occur at lower frequencies compared to other types of leaky-wave blindness. In the second part of this paper, parasitic notches are proposed as an effective measure to significantly improve the E-plane scanning characteristics of the considered array by reducing the magnitude of the leaky modes. As a beneficial side-effect, these parasitic notches are also proven to improve the H-plane scanning characteristics by suppressing resonances within the stripline substrate cavity of the individual tapered-slot elements. Numerical simulations and measurements performed on a 169-element array prototype validate the analysis and confirm the effectiveness of the proposed concept for scan blindness suppression.
Sponsorship	IEEE Antennas and Propagation Society
Starting Page	4057
Ending Page	4066
Page Count	10
File Size	1909795
File Format	PDF
ISSN	0018926X
Volume Number	62
Issue Number	8
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2014-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Blindness Arrays Lattices Cavity resonators Resonant frequency Substrates Antennas tapered-slot antenna Leaky-wave mode phased array scan blindness
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electrical and Electronic Engineering

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