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

页码：3430 / 3440

页数：11