Title:
The antenna for uninhabited ground sensors
Document Type and Number:
Japanese Patent JP6190885
Kind Code:
B2
Abstract:
An unattended ground sensor unit (30) is disclosed comprising an antenna (2) which is accommodated mainly in a head portion (5) of the unit. The antenna (2) comprises a base conductor (100) and a top conductor (102), both of which are circular plates arranged in a horizontal plane. An antenna rod (204) is electrically connected to the top conductor (102). A hole is provided in the base conductor (100) and the antenna rod (204) extends through the hole to be connected to antenna control circuitry on a printed circuit board (104) on the reverse side of the base conductor (100). An insulating ring (106) is provided around the antenna rod (204) where it extends through the base conductor (100) so that the antenna (rod 204) is electrically insulated from the base conductor (100). Two shorting pins (205) are provided between the top conductor (102) and the base conductor (100). The shorting pins (20) are provided on diametrically opposite sides of the antenna rod (204). A dielectric spacer (202) is provided having a keying cutout (112) that can be engaged to resist its rotation.
Inventors:
Bear Park, Paul Joseph
Application Number:
JP2015536215A
Publication Date:
August 30, 2017
Filing Date:
August 12, 2013
Export Citation:
Assignee:
Digital Barriers Services Limited
International Classes:
H01Q1/04; H01Q1/12; H01Q1/42
Domestic Patent References:
| JP8046531A | ||||
| JP2006126156A | ||||
| JP2004088198A | ||||
| JP2003209431A | ||||
| JP11066484A | ||||
| JP7183720A | ||||
| JP2049234U |
Foreign References:
| US20120134237 | ||||
| US20090290453 | ||||
| US3930218 |
Attorney, Agent or Firm:
Asamura patent office