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Q-factor Bounds for Microstrip Patch Antennas

Nel, Ben LU ; Skrivervik, Anja LU and Gustafsson, Mats LU orcid (2023) In IEEE Transactions on Antennas and Propagation 71(4). p.3430-3440
Abstract
Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth. This article presents the first tight lower Q-factor bounds on microstrip patch antennas supported by an infinite dielectric substrate. The derived lower Q-factor bounds are orders of magnitude tighter than the Chu limit and introduce a new scaling rule. These bounds consider all possible geometries on the predefined design region. Moreover, it is shown that well-known patch antennas have Q-factors near the bounds and have thus a near-optimal... (More)
Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth. This article presents the first tight lower Q-factor bounds on microstrip patch antennas supported by an infinite dielectric substrate. The derived lower Q-factor bounds are orders of magnitude tighter than the Chu limit and introduce a new scaling rule. These bounds consider all possible geometries on the predefined design region. Moreover, it is shown that well-known patch antennas have Q-factors near the bounds and have thus a near-optimal bandwidth. The computation of the bounds is done using a method of moments (MoM) formulation. However, an approximation to these bounds using commonly available simulation tools is provided. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
IEEE Transactions on Antennas and Propagation
volume
71
issue
4
pages
3430 - 3440
publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
external identifiers
  • scopus:85149372334
ISSN
0018-926X
DOI
10.1109/TAP.2023.3243726
language
English
LU publication?
yes
id
4c379fe4-84b2-44c5-a22a-b80e8fb5f618
date added to LUP
2023-01-27 16:52:21
date last changed
2024-01-12 13:37:50
@article{4c379fe4-84b2-44c5-a22a-b80e8fb5f618,
  abstract     = {{Antenna bounds are a useful tool in assessing the feasibility or performance of an antenna design. Microstrip patch antennas are often limited by their relatively narrow bandwidth, and therefore Q-factor is an important design parameter, as it is related to the inverse of the fractional bandwidth. This article presents the first tight lower Q-factor bounds on microstrip patch antennas supported by an infinite dielectric substrate. The derived lower Q-factor bounds are orders of magnitude tighter than the Chu limit and introduce a new scaling rule. These bounds consider all possible geometries on the predefined design region. Moreover, it is shown that well-known patch antennas have Q-factors near the bounds and have thus a near-optimal bandwidth. The computation of the bounds is done using a method of moments (MoM) formulation. However, an approximation to these bounds using commonly available simulation tools is provided.}},
  author       = {{Nel, Ben and Skrivervik, Anja and Gustafsson, Mats}},
  issn         = {{0018-926X}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{3430--3440}},
  publisher    = {{IEEE - Institute of Electrical and Electronics Engineers Inc.}},
  series       = {{IEEE Transactions on Antennas and Propagation}},
  title        = {{Q-factor Bounds for Microstrip Patch Antennas}},
  url          = {{https://lup.lub.lu.se/search/files/135974903/TEAT_7275.pdf}},
  doi          = {{10.1109/TAP.2023.3243726}},
  volume       = {{71}},
  year         = {{2023}},
}