The Impact of Slow-Wave Modes on the Radiation Performance of a Corrugated Horn Antenna
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- 作者：Philipp F¨¹rholz and Axel Murk
- 关键词：Horn antenna ; Slow ; wave modes ; Antenna pattern ; Gaussian beam analysis
- 刊名：Journal of Infrared, Millimeter and Terahertz Waves
- 出版年：2010
- 出版时间：February, 2010
- 年：2010
- 卷：31
- 期：2
- 页码：169-180
- 全文大小：496.3 KB
文摘
Corrugated horn antennas offer many advantages compared with other waveguide radiators. A major disadvantage which is inherent with the design of a corrugated horn is the fact that slow-wave modes may exist within the horn antenna. In this paper far-field measurements of a W-band horn antenna are presented. The experimental data is compared with simulated data to confirm the presence of slow-wave modes. The analysis is completed by determining the waist, the gaussicity and the phase center location of both the experimental and model data. Finally a redesign approach is proposed which suppresses the slow-wave modes and therefore increases the usable bandwidth of the horn antenna.