Reversion F antenna system of four planes in use for terminals in multiple input/output communication system
Title：
Reversion F antenna system of four planes in use for terminals in multiple input/output communication system
Application Number：
 200510012071
Application Date：
 2005/07/01
Announcement Date：
 2006/02/01
Pub. Date：
Publication Number：
 1728456
Announcement Number：
Grant Date：
Granted Pub. Date：
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 H01Q 1/38, H01Q 1/52, H01Q 13/08, H01Q 21/28
Applicant(s)：
 Tsinghua Univ
Inventor(s)：
 Yang Gang, Du Zhengwei, Gong Ke, Wang Qiang
Key Words：
 multiple input/output, communication system, terminals, four planes, reversion F antenna system
Abstract：
 According to four quadrants, four pieces of plane reversion F antenna unit in ground plane contraction type are arranged on front face of PCB. Adjacent two pieces of antenna are perpendicular to each other with gap in 0.1-0.5 times of operation wavelength of antenna unit. Antenna units in first and third quadrants are 180+10 degrees rotational symmetry for midpoint of connecting line between same points in two pieces of antenna. Distance between feeding points are larger than 0.25 time of wavelength. Antenna units in second and fourth quadrants are in same arrangement. There is cross extension type metal ground plane with via hole connected to ground of each antenna unit. Through via hole, metal layer on back face of PCB is connected to cross extension type metal ground plane. On metal layer in backside, there is slit on blank place between units of antenna in second and third quadrants. Advantages are: small cross coupling, high radiant efficiency and large system capacity.
Claim：
Priority：
PCT：
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2008-4-17
  Selected patents owned by Tsinghua University filed in 2005 are loaded.
2008-3-31
  Selected patents owned by Tsinghua University filed in 2006 and 2007 are load.







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