Decoupling Method for Four Closely Spaced Planar Inverted-F Antennas Using Parasitic Elements and Bridge Lines

Quang Quan PHUNG; Tuan Hung NGUYEN; Naobumi MICHISHITA; Hiroshi SATO; Yoshio KOYANAGI; Hisashi MORISHITA

doi:10.1587/transcom.2022EBP3190

IEICE TRANSACTIONS on Communications

Decoupling Method for Four Closely Spaced Planar Inverted-F Antennas Using Parasitic Elements and Bridge Lines

Quang Quan PHUNG, Tuan Hung NGUYEN, Naobumi MICHISHITA, Hiroshi SATO, Yoshio KOYANAGI, Hisashi MORISHITA

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This study proposed a novel decoupling method for four planar inverted-F antennas (PIFAs) operating at 2.0GHz (f₀). The edge-to-edge and center-to-center spacings of the adjacent PIFAs are extremely small (0.05λ₀ and 0.17λ₀, respectively), resulting in strong mutual coupling among them. In our previous study, we proposed a structure consisting of parasitic elements (PEs) and a bridge line (BL) for the decoupling of two PIFAs. One attractive feature of the proposed method is that no adjustment of the original structure and size of the PIFAs is necessary. However, as the number of PIFAs increases to four, their decoupling becomes considerably more complicated, and impedance mismatch is also an issue to be considered. Therefore, in this study, PEs and BLs are functionally developed to simultaneously achieve low mutual coupling and improved impedance matching of the four PIFAs. The simulated results showed that loading the proposed PEs and BLs onto the four PIFAs could reduce as well as maintain all mutual coupling for less than -10dB, and simultaneously improve impedance matching. Therefore, the total antenna efficiency at 2.0GHz could be significantly improved from 64.2% to 84.8% for PIFA1 and PIFA4, and from 35.9% to 74.2% for PIFA2 and PIFA3. Four PIFAs with PEs and BLs were fabricated and measured to validate the simulation results.

Publication: IEICE TRANSACTIONS on Communications Vol.E106-B No.11 pp.1154-1164

Publication Date: 2023/11/01

Publicized: 2023/05/23

Online ISSN: 1745-1345

DOI: 10.1587/transcom.2022EBP3190

Type of Manuscript: PAPER

Category: Antennas and Propagation

Authors

Quang Quan PHUNG
  National Defense Academy
Tuan Hung NGUYEN
  Le Quy Don Technical University
Naobumi MICHISHITA
  National Defense Academy
Hiroshi SATO
  Panasonic System Networks R&D Lab.
Yoshio KOYANAGI
  Panasonic System Networks R&D Lab.
Hisashi MORISHITA
  National Defense Academy

Keyword

decoupling, four PIFAs, parasitic element, bridge line

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Quang Quan PHUNG, Tuan Hung NGUYEN, Naobumi MICHISHITA, Hiroshi SATO, Yoshio KOYANAGI, Hisashi MORISHITA, "Decoupling Method for Four Closely Spaced Planar Inverted-F Antennas Using Parasitic Elements and Bridge Lines" in IEICE TRANSACTIONS on Communications, vol. E106-B, no. 11, pp. 1154-1164, November 2023, doi: 10.1587/transcom.2022EBP3190.
Abstract: This study proposed a novel decoupling method for four planar inverted-F antennas (PIFAs) operating at 2.0GHz (f₀). The edge-to-edge and center-to-center spacings of the adjacent PIFAs are extremely small (0.05λ₀ and 0.17λ₀, respectively), resulting in strong mutual coupling among them. In our previous study, we proposed a structure consisting of parasitic elements (PEs) and a bridge line (BL) for the decoupling of two PIFAs. One attractive feature of the proposed method is that no adjustment of the original structure and size of the PIFAs is necessary. However, as the number of PIFAs increases to four, their decoupling becomes considerably more complicated, and impedance mismatch is also an issue to be considered. Therefore, in this study, PEs and BLs are functionally developed to simultaneously achieve low mutual coupling and improved impedance matching of the four PIFAs. The simulated results showed that loading the proposed PEs and BLs onto the four PIFAs could reduce as well as maintain all mutual coupling for less than -10dB, and simultaneously improve impedance matching. Therefore, the total antenna efficiency at 2.0GHz could be significantly improved from 64.2% to 84.8% for PIFA1 and PIFA4, and from 35.9% to 74.2% for PIFA2 and PIFA3. Four PIFAs with PEs and BLs were fabricated and measured to validate the simulation results.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2022EBP3190/_p

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@ARTICLE{e106-b_11_1154,
author={Quang Quan PHUNG, Tuan Hung NGUYEN, Naobumi MICHISHITA, Hiroshi SATO, Yoshio KOYANAGI, Hisashi MORISHITA, },
journal={IEICE TRANSACTIONS on Communications},
title={Decoupling Method for Four Closely Spaced Planar Inverted-F Antennas Using Parasitic Elements and Bridge Lines},
year={2023},
volume={E106-B},
number={11},
pages={1154-1164},
abstract={This study proposed a novel decoupling method for four planar inverted-F antennas (PIFAs) operating at 2.0GHz (f₀). The edge-to-edge and center-to-center spacings of the adjacent PIFAs are extremely small (0.05λ₀ and 0.17λ₀, respectively), resulting in strong mutual coupling among them. In our previous study, we proposed a structure consisting of parasitic elements (PEs) and a bridge line (BL) for the decoupling of two PIFAs. One attractive feature of the proposed method is that no adjustment of the original structure and size of the PIFAs is necessary. However, as the number of PIFAs increases to four, their decoupling becomes considerably more complicated, and impedance mismatch is also an issue to be considered. Therefore, in this study, PEs and BLs are functionally developed to simultaneously achieve low mutual coupling and improved impedance matching of the four PIFAs. The simulated results showed that loading the proposed PEs and BLs onto the four PIFAs could reduce as well as maintain all mutual coupling for less than -10dB, and simultaneously improve impedance matching. Therefore, the total antenna efficiency at 2.0GHz could be significantly improved from 64.2% to 84.8% for PIFA1 and PIFA4, and from 35.9% to 74.2% for PIFA2 and PIFA3. Four PIFAs with PEs and BLs were fabricated and measured to validate the simulation results.},
keywords={},
doi={10.1587/transcom.2022EBP3190},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - Decoupling Method for Four Closely Spaced Planar Inverted-F Antennas Using Parasitic Elements and Bridge Lines
T2 - IEICE TRANSACTIONS on Communications
SP - 1154
EP - 1164
AU - Quang Quan PHUNG
AU - Tuan Hung NGUYEN
AU - Naobumi MICHISHITA
AU - Hiroshi SATO
AU - Yoshio KOYANAGI
AU - Hisashi MORISHITA
PY - 2023
DO - 10.1587/transcom.2022EBP3190
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E106-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2023
AB - This study proposed a novel decoupling method for four planar inverted-F antennas (PIFAs) operating at 2.0GHz (f₀). The edge-to-edge and center-to-center spacings of the adjacent PIFAs are extremely small (0.05λ₀ and 0.17λ₀, respectively), resulting in strong mutual coupling among them. In our previous study, we proposed a structure consisting of parasitic elements (PEs) and a bridge line (BL) for the decoupling of two PIFAs. One attractive feature of the proposed method is that no adjustment of the original structure and size of the PIFAs is necessary. However, as the number of PIFAs increases to four, their decoupling becomes considerably more complicated, and impedance mismatch is also an issue to be considered. Therefore, in this study, PEs and BLs are functionally developed to simultaneously achieve low mutual coupling and improved impedance matching of the four PIFAs. The simulated results showed that loading the proposed PEs and BLs onto the four PIFAs could reduce as well as maintain all mutual coupling for less than -10dB, and simultaneously improve impedance matching. Therefore, the total antenna efficiency at 2.0GHz could be significantly improved from 64.2% to 84.8% for PIFA1 and PIFA4, and from 35.9% to 74.2% for PIFA2 and PIFA3. Four PIFAs with PEs and BLs were fabricated and measured to validate the simulation results.
ER -

IEICE TRANSACTIONS on Communications