Array antenna apparatus capable of switching direction...

Details Array antenna apparatus capable of switching direction... Array antenna apparatus capable of switching direction...

2006-10-31

2006-10-31

Le, HoangAnh (Department: 2821)

Communications: radio wave antennas

Antennas

Microstrip

C343S745000

Reexamination Certificate

active

07129897

ABSTRACT:
An array antenna apparatus includes a dielectric substrate, a feeder element, a parasitic element, and a directivity control unit. The feeder element and the parasitic element have an equal length. The feeder element and the parasitic element are arranged such that they intersect with each other at a substantially central portion of the parasitic element and a feeder unit of the feeder element and such that the parasitic elements are arranged symmetrically around the feeder element. An interval between the feeder element and the parasitic element is not larger than half wavelength of a radio wave. The parasitic element has a varactor diode serving as a variable capacitance element loaded. The directivity control unit supplies a control voltage to the varactor diode, and switches directivity of the array antenna apparatus.

REFERENCES:
patent: 3454950 (1969-07-01), Grant et al.
patent: 4812855 (1989-03-01), Coe et al.
patent: 5497164 (1996-03-01), Croq
patent: 5539419 (1996-07-01), Ogawa et al.
patent: 5754146 (1998-05-01), Knowles et al.
patent: 6025812 (2000-02-01), Gabriel et al.
patent: 6211830 (2001-04-01), Monma et al.
patent: 6509883 (2003-01-01), Foti et al.
patent: 6606057 (2003-08-01), Chiang et al.
Takashi Ohira et al.; “Basic Theory on 2-Element Espar Antennas from Reactance Diversity Viewpoint”;Technical Report of The Institute of Electronics, Information and Communications Engineers: c. 2002; pp. 13-18.

Affiliated with

Also associated with

Rating

Array antenna apparatus capable of switching direction... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Array antenna apparatus capable of switching direction..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Array antenna apparatus capable of switching direction... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3718331