Title:
MULTI-FREQUENCY ANTENNA
Document Type and Number:
WIPO Patent Application WO/2001/071847
Kind Code:
A1
Abstract:
A D net antenna is divided into two and one is provided, as a D net element (13), in an antenna element (1) while the other element is contained, as a lower element (10), in a cover section (2). An E net element (11) is connected to the upper end of the lower element (10). The E net element (11) has a rectangular radiation surface and thereby has substantial nondirectionality in the horizontal plane. The antenna element (1) is fixed removably to the cover section (2), so that the D net element (13) is connected with the lower element (10), thus providing a multi-frequency antenna operating over two wide frequency bands.
Inventors:
SHIMIZU HIROSHI
KADOTA YOSHIO
KADOTA YOSHIO
Application Number:
PCT/JP2001/001362
Publication Date:
September 27, 2001
Filing Date:
February 23, 2001
Export Citation:
Assignee:
NIPPON ANTENNA KK (JP)
International Classes:
H01Q1/22; H01Q1/32; H01Q5/10; H01Q5/321; H01Q5/357; H01Q9/04; H01Q9/32; H01Q9/40; H01Q21/30; (IPC1-7): H01Q1/32; H01Q5/00
Foreign References:
| JPH08204431A | 1996-08-09 | |||
| JPH1168453A | 1999-03-09 | |||
| JPS63129308U | 1988-08-24 | |||
| JPH08335824A | 1996-12-17 | |||
| JP3058480U | 1999-06-18 |
Other References:
See also references of EP 1187253A4
Attorney, Agent or Firm:
Asami, Yasuo (Shinkawa-Ohara BLDG. 6F 27-8 Shinkawa 1-chome Chuo-ku, Tokyo, JP)
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