NDLI: Effect of mutual coupling between feed elements on integrated lens antenna performance

Content Provider	IET Digital Library
Author	Karki, Sabin Kumar Laurinaho, Juha Ala Viikari, Ville Valkonen, Risto
Abstract	An integrated lens antenna (ILA) equipped with a beam-switching array feed provides beam-steering. This study investigates the effects of the mutual coupling between the feed array elements on the ILA performance. A simulation study of an ILA with two different feed types with varying mutual coupling levels is done. Radiation pattern and boresight directivity of the ILA are in the prime focus of the study. An aperture-coupled microstrip patch antenna (ACMPA) and a stacked ACMPA feeds embedded in an array are used to study the radiation characteristics of the ILA. Results show that changes in directivity and radiation pattern of the feed caused by the mutual coupling have significant impact in the ILA characteristics. However, it is found that the mutual coupling level alone does not predict well the changes in the ILA radiation. Among two feed antenna types with similar mutual coupling variation, the stacked ACMPA feed with less radiation pattern distortion gives better ILA performance compared to the ACMPA feed with significant radiation pattern distortion. Furthermore, impact of the port impedance mismatch of the adjacent inactive antennas on the active element performance of a beam-switching feed network and its corresponding impact on the ILA is investigated.
Starting Page	1649
Ending Page	1655
Page Count	7
ISSN	17518725
Volume Number	12
e-ISSN	17518733
Issue Number	Issue 10, Aug (2018)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-map/12/10
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-map.2017.1082
Journal	IET Microwaves, Antennas & Propagation
Publisher Date	2018-04-09
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	ACMPA Active Element Performance Adjacent Inactive Antenna Antenna Accessory Antenna Array Antenna Feeds Antenna Radiation Pattern Aperture-coupled Antenna Aperture-coupled Microstrip Patch Antenna Beam Steering Beam-switching Array Feed Beam-switching Feed Network Boresight Directivity Boresight Radiation Pattern Distortion Feed Array Element Feed Element ILA Characteristic ILA Performance ILA Radiation Integrated Lens Antenna Performance Lens Antenna Microstrip Antenna Array Mutual Coupling Level Radiation Characteristic Similar Mutual Coupling Variation Simulation Study Stacked ACMPA Feed
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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