A General and Accurate Formula for the Beamwidth of 1-D Leaky-Wave Antennas

被引：31
|
作者：
Fuscaldo, Walter [1 ,2 ]
Jackson, David R. [3 ]
Galli, Alessandro [1 ]
机构：
[1] Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun, I-00184 Rome, Italy
[2] Univ Rennes 1, Inst Elect & Telecommun Rennes, F-35042 Rennes, France
[3] Univ Houston, Dept Elect & Comp Engn, Houston, TX 77204 USA
来源：
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2017年 / 65卷 / 04期
关键词：
Beamwidth; endfire radiation; leaky waves; leaky-wave antennas (LWAs); OPTIMIZATION; RADIATION; BROADSIDE;
D O I：
10.1109/TAP.2017.2670617
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：
In this paper, a general formula for the half-power beamwidth of one-dimensional leaky-wave antennas (1-D LWAs) is presented. With respect to previous beamwidth formulas found in the literature, the new formula allows for both arbitrary propagation wavenumber and length of the antenna. The pointing angle of the beam is allowed to be arbitrary, and may be near broadside or endfire, or any angle in between. The beamwidth is also allowed to be arbitrary, though a simpler approximate expression is obtained under the assumption of a narrow beam. Numerical results confirm the accuracy of the new beamwidth formula. Furthermore, it is shown that the previous existing formulas are approximate limiting cases of this more general result. This new formula will provide a very useful tool for obtaining more reliable results for the beamwidth of any type of 1-D LWA.
引用
收藏
页码：1670 / 1679
页数：10
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