@inproceedings{bf9ec47b4ebb481e916c8e3d3875db96,
title = "Omnidirectional higher mode microstrip antenna for GPS",
abstract = "A kind of annual ring microstrip antenna operating at higher mode which pattern covers the lower elevation angle area is described. The pattern in azimuthal plane is omnidirectional with some ripple. A qualitative method is employed to analysis why the ripple emerges. A simply way is adopted to lower the ripple.",
author = "Xuebin Yang and Shannwei Lue and Cheng, \{L. L.\}",
year = "1997",
language = "English",
volume = "1",
publisher = "IEEE",
pages = "453--455",
booktitle = "Asia-Pacific Microwave Conference Proceedings, APMC",
address = "United States",
note = "1997 Asia-Pacific Microwave Conference (APMC 97) ; Conference date: 02-12-1997 Through 05-12-1997",
}