Q-Factor Bounds for Microstrip Patch Antennas

被引：4
|
作者：
Nel, Ben A. P. [1 ]
Skrivervik, Anja K. [1 ,2 ]
Gustafsson, Mats [1 ]
机构：
[1] Lund Univ, Dept Elect & Informat Technol, SE-22100 Lund, Sweden
[2] Ecole Polytech Fed Lausanne EPFL, Microwave Antenna Grp, CH-1015 Lausanne, Switzerland
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2023年 / 71卷 / 04期
基金：
瑞典研究理事会;
关键词：
Microstrip antennas; Q-factor; Patch antennas; Microstrip; Bandwidth; Antennas; Method of moments (MoM); microstrip patch antennas; optimization; physical bounds Q-factor; Sommerfeld integrals; PHYSICAL LIMITATIONS; IMPEDANCE; ENERGY;
D O I：
10.1109/TAP.2023.3243726
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
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.
引用
收藏
页码：3430 / 3440
页数：11
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