Communications: radio wave antennas – Antennas – Switching between antennas and lines
Reexamination Certificate
2005-07-21
2009-12-15
Owens, Douglas W (Department: 2821)
Communications: radio wave antennas
Antennas
Switching between antennas and lines
C343S746000, C343S767000, C343S768000, C343S770000
Reexamination Certificate
active
07633458
ABSTRACT:
Provided is an antenna which has a small-sized planar constitution as can be easily mounted on a small-sized radio device and which can form a principal beam having a vertical polarization in directions of low and high elevation angles.On the surface of a substrate11, slot elements13A and13B having a length of about one half wavelength are arranged in parallel at a predetermined distance d1, and a reflecting plate14is arranged at a predetermined distance h from the mounting face of the slot elements13A and13B. On the back of the substrate11, parasitic elements15A to15D are made of a copper foil pattern and are arrayed to intersect the slot elements13A and13B at right angles. A switching element16A is connected with the parasitic elements15A and15B, and a switching element16B is connected with the parasitic elements15C and15D.
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Hiroyuki Uno et al., “Slot Soshi o Mochiita Chilled Beam Kirikaeshiki Sector Antenna”, 2004 Nen The Institute of Electronics, Information and Communication Engineers Sogo Taikai, Tsushin 1-B-1-201, Mar. 8, 2004 (Mar. 8, 2004).
Hiroyuki Uno et al., “Beam Kirikae Kairo o Jisso shita Chilled Beam Slot Antenna”, 2004 Nen IEICE Communications Society Conference, B-1-141, Sep. 8, 2004 (Sep. 8, 2004).
Koyanagi Yoshio
Ohta Gen-ichiro
Saito Yutaka
Uno Hiroyuki
Hu Jennifer F
Owens Douglas W
Panasonic Corporation
Pearne & Gordon LLP
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