Title :
Study on the elimination of surface wave by metal fences
Author :
Zhang, R. ; Fang, D.G. ; Wu, K.L. ; Sheng, VJ X.
Author_Institution :
Dept. of Commun. Eng., Nanjing Univ. of Sci. & Technol., China
Abstract :
The microstrip antenna is a low-profile planar structure and is inexpensive compared with other types of antennas due to the ease of manufacture. However, patch-antenna designs have some limitations such as restricted bandwidth, low gain, and a decrease in radiation efficiency due to surface wave modes. Surface wave modes in microstrip substrates may cause the undesired energy losses and the reduction of the radiation efficiency of the patch antenna. A scheme to eliminate such modes by using metal fences is proposed. This structure can be easily realized by a metalated hole in manufacturing. It is observed that the patch antenna with this structure shows reduced levels of surface wave modes, thus improving the gain and the radiation pattern
Keywords :
antenna radiation patterns; antenna theory; electromagnetic wave propagation; microstrip antennas; substrates; bandwidth; energy losses; gain; low-profile planar structure; metal fences; metalated hole; microstrip substrates; patch antenna; patch-antenna designs; radiation efficiency; radiation pattern; surface wave elimination; surface wave modes; Antennas and propagation; Bandwidth; Circuits; Dielectric substrates; Frequency; Manufacturing; Microstrip antenna arrays; Microstrip antennas; Patch antennas; Surface waves;
Conference_Titel :
Environmental Electromagnetics, 2000. CEEM 2000. Proceedings. Asia-Pacific Conference on
Conference_Location :
Shanghai
Print_ISBN :
7-5635-0420-6
DOI :
10.1109/CEEM.2000.853926
