Far Field Computation of the Traveling Wave Structures and a New Approach for Suppressing the Sidelobe Levels

Author

Zheng Li ; Junhong Wang ; Zhan Zhang ; Meie Chen

Author_Institution

Key Lab. of All Opt. Network & Adv. Telecommun. Network of MOE, Beijing Jiaotong Univ., Beijing, China

Volume

61

Issue

4

fYear

2013

fDate

4/1/2013 12:00:00 AM

Firstpage

2308

Lastpage

2312

Abstract

The effective radiation section (ERS) proposed for studying the radiation of traveling-wave structure is further studied in this communication. The formulas for computing the radiation pattern of traveling-wave structure using the newly defined ERSs is derived. The effect of the attenuation constant on the computation of radiation pattern is discussed. A new idea for reducing the sidelobe level (SLL) of the traveling-wave structure is proposed by suppressing the emissions from the corresponding ERSs. It is found that the ERSs are not always located at the ends of the traveling-wave structure, this is quite different from the conventional viewpoint concerning the fast-and slow-wave radiations, and the reason is explained in detail. A line-source model corresponding to a 70-cell composite right/left handed (CRLH) traveling-wave structure is employed in the analysis, and the results are verified by full-wave method.

Keywords

antenna radiation patterns; 70-cell composite right/left handed traveling-wave structure; CRLH traveling-wave structure; ERS; effective radiation section; far field computation; fast-wave radiations; full-wave method; radiation pattern; sidelobe levels suppresion; slow-wave radiations; Antenna radiation patterns; Apertures; Attenuation; Leaky wave antennas; Power transmission lines; Simulation; Composite right/left-handed (CRLH) transmission line; effective radiation section (ERS); sidelobe level (SLL); traveling wave;

fLanguage

English

Journal_Title

Antennas and Propagation, IEEE Transactions on

Publisher

ieee

ISSN

0018-926X

Type

jour

DOI

10.1109/TAP.2013.2237738

Filename

6401162