Poynting Streamlines, Effective Area Shape, and the Design of Superdirective Antennas

被引：17

作者：

Diao, Junming ^{[1
]}

Warnick, Karl F. ^{[1
]}

机构：

[1] Brigham Young Univ, Dept Elect & Comp Engn, Provo, UT 84602 USA

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2017年 / 65卷 / 02期

基金：

美国国家科学基金会;

关键词：

Effective area shape; Poynting streamlines; receiving antenna; superdirective antenna; LIMITATIONS; EFFICIENCY;

D O I：

10.1109/TAP.2016.2632618

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：

A receiving antenna alters an incident field in such a way that the field is concentrated at the terminals of the antenna. The Poynting power flux density vector associated with the field carries to the antenna the power dissipated in the antenna structure and the load. Streamlines of the Poynting vector field can be used to understand electromagnetic energy flow near linear and aperture antennas. Poynting streamlines provide a way to understand and guide the design of superdirective antennas. Directivity-enhancing screens that attract Poynting streamlines and increase the aperture efficiency of a horn antenna to almost 200% are studied. Superdirective antennas generally have limited practical value due to poor radiation efficiency, narrow bandwidth, and extreme sensitivity to fabrication errors. We show that these limitations can be mitigated by using metal-only structures that are optimized for broadband operation. The tradeoff between peak achievable aperture efficiency and bandwidth is explored.

引用

页码：861 / 866

页数：6

共 13 条

[1]

[Anonymous], 1997, CARTANS GENERALIZATI

[2] The Use of a Dielectric Lens to Improve the Efficiency of a Dual-Polarized Quad-Ridge Horn From 5 to 15 GHz [J].

Bauerle, Robert J. ;

Schrimpf, Robert ;

Gyorko, Eric ;

Henderson, John .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2009, 57 (06) :1822-1825

[3] Optimization of profiles of rectangular horns for high efficiency [J].

Bird, Trevor S. ;

Granet, Christophe .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 2007, 55 (09) :2480-2488

[4] PHYSICAL LIMITATIONS OF OMNI-DIRECTIONAL ANTENNAS [J].

CHU, LJ .

JOURNAL OF APPLIED PHYSICS, 1948, 19 (12) :1163-1175

[5]

GREVING G, 1978, AEU-INT J ELECTRON C, V32, P49

[6] FUNDAMENTAL LIMITATIONS IN ANTENNAS [J].

HANSEN, RC .

PROCEEDINGS OF THE IEEE, 1981, 69 (02) :170-182

[7] Design of Yagi-Uda antennas using genetic algorithms [J].

Jones, EA ;

Joines, WT .

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION, 1997, 45 (09) :1386-1392

[8] Experimental demonstration of superdirective dielectric antenna [J].

Krasnok, Alexander E. ;

Filonov, Dmitry S. ;

Simovski, Constantin R. ;

Kivshar, Yuri S. ;

Belov, Pavel A. .

APPLIED PHYSICS LETTERS, 2014, 104 (13)

[9] Experiments on high-performance beam-scanning antennas made of gradient-index metamaterials [J].

Ma, Hui Feng ;

Chen, Xi ;

Xu, Hong Sheng ;

Yang, Xin Mi ;

Jiang, Wei Xiang ;

Cui, Tie Jun .

APPLIED PHYSICS LETTERS, 2009, 95 (09)

[10]

MULLER B, 1972, AEU-ARCH ELEKTRON UB, V26, P443

← 1 2 →