University of Oulu

Ramachandran, P, Kähäri, H, Juuti, J, Jantunen, H. Room temperature densified ceramics for weight optimized circular polarized GPS antenna design. Microw Opt Technol Lett. 2018; 60: 1061– 1066. https://doi.org/10.1002/mop.31105

Room temperature densified ceramics for weight optimized circular polarized GPS antenna design

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Author: Ramachandran, Prasadh1; Kähäri, Hanna1; Juuti, Jari1;
Organizations: 1Microelectronics Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, Oulu 90014, Finland
Format: article
Version: accepted version
Access: closed
Persistent link: http://urn.fi/urn:nbn:fi-fe2019052116286
Language: English
Published: John Wiley & Sons, 2018
Publish Date: 2019-05-21
Description:

Abstract

This article presents the use of ceramic composite composed of Li₂MoO₄ and 9 vol% of BaTiO₃ to realize compact weight optimized circular polarized GPS antenna. The ceramic substrate for the antenna was fabricated with a room‐temperature densification method based on the use of a small amount of an aqueous phase of Li₂MoO₄ and subsequent recrystallization. A square patch (FT‐FB) was used as a reference patch antenna. This was then compared with a double curved patch antenna (CT‐CB) and a curved patch with a flat bottom (CT‐FB). It was observed that the axial ratio and radiation patterns of the different patch antennas were very similar. In simulations, the FT‐FB patch had peak total efficiency of −2.2 dB, followed by the CT‐CB patch with total efficiency of −2.5 dB and the CT‐FB patch with total efficiency of −2.7 dB. The mass of the FT‐FB and CT‐CB antennas were 12.66 g, while the mass of the CT‐FB antenna was only 9.44 g. Thus, a weight reduction of 25.4% was obtained. Ease of fabrication using Li₂MoO₄‐based composite ceramic helps in creating an optimal antenna design for size and weight‐constrained mobile devices such as drones.

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Series: Microwave and optical technology letters
ISSN: 0895-2477
ISSN-E: 1098-2760
ISSN-L: 0895-2477
Volume: 60
Issue: 4
Pages: 1061 - 1066
DOI: 10.1002/mop.31105
OADOI: https://oadoi.org/10.1002/mop.31105
Type of Publication: A1 Journal article – refereed
Field of Science: 213 Electronic, automation and communications engineering, electronics
216 Materials engineering
Subjects:
GPS
Funding: European Research Council (ERC), Grant/Award Number: 291132; Academy of Finland, Grant/Award Number: 267573; Finnish Foundation for Technology Promotion; KAUTE Foundation; Ulla Tuominen Foundation; Tauno Tönning Foundation; Foundation for Women in Academic Research.
EU Grant Number: (291132) ULTIMATE CERAMICS - Printed Electroceramics with Ultimate Compositions
Academy of Finland Grant Number: 267573
Detailed Information: 267573 (Academy of Finland Funding decision)
Copyright information: © 2018 Wiley Periodicals, Inc. This is the peer reviewed version of the following article: Ramachandran, P, Kähäri, H, Juuti, J, Jantunen, H. Room temperature densified ceramics for weight optimized circular polarized GPS antenna design. Microw Opt Technol Lett. 2018; 60: 1061– 1066. https://doi.org/10.1002/mop.31105 , which has been published in final form at https://doi.org/10.1002/mop.31105. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions.