Title:
RF TUNING ANTENNA
Document Type and Number:
Japanese Patent JPH07176928
Kind Code:
A
Abstract:
PURPOSE: To increase the sensitivity of an antenna formed on a circuit board at the time of receiving an RF signal from a direction except the normal of the plane of the antenna. CONSTITUTION: An antenna arranged on a circuit board 10 is provided with a slim stub 14 formed on an upper face 9 of the circuit board 10, and a conductive ground face on the bottom face of the circuit board 10, and an end part 26 of the stub 14 is connected through a through-hole 16 of the dielectric 10 with the ground face. The combination of the ground face with the stub 14 forms a resonance cavity 18. The cavity 18 can be tuned by a synchronizing hole 24 arranged at the stub 14. The stub 14 is provided with a conductive sail-shaped member 20 for increasing the whole directivity and sensitivity of the antenna, and the sail-shaped member 20 is allowed to act by pumping RF energy received from a direction substantially vertical to the surface in the cavity 18.
Inventors:
JIYON EFU KENEDEI
POORU EI ZOITO
POORU EI ZOITO
Application Number:
JP23917294A
Publication Date:
July 14, 1995
Filing Date:
October 03, 1994
Export Citation:
Assignee:
FORD MOTOR CO
International Classes:
H01Q1/38; H01Q1/24; H01Q9/04; H01Q21/29; (IPC1-7): H01Q1/38; H01Q1/24
Attorney, Agent or Firm:
Akira Asamura (3 outside)