P

Inventor

YUANZHU DOU

JP39 patents

Patents

39 patents
US6952183B2Oct 4, 2005

Circularly-polarized-wave patch antenna which can be used in a wide frequency band

ALPS ELECTRIC CO LTD180 citations99
US6809687B2Oct 26, 2004

Monopole antenna that can easily be reduced in height dimension

ALPS ELECTRIC CO LTD52 citations96
US7388553B2Jun 17, 2008

Antenna device for vehicle

ALPS ELECTRIC CO LTD20 citations92
US7304611B2Dec 4, 2007

Antenna system with high gain for radio waves polarized in particular direction

ALPS ELECTRIC CO LTD20 citations92
US7248224B2Jul 24, 2007

Antenna device having radiation characteristics suitable for ultrawideband communications

ALPS ELECTRIC CO LTD20 citations92
US7148847B2Dec 12, 2006

Small-size, low-height antenna device capable of easily ensuring predetermined bandwidth

ALPS ELECTRIC CO LTD40 citations92
US7079078B2Jul 18, 2006

Patch antenna apparatus preferable for receiving ground wave and signal wave from low elevation angle satellite

ALPS ELECTRIC CO LTD20 citations92
US6982673B2Jan 3, 2006

Inverted-F metal plate antenna having increased bandwidth

ALPS ELECTRIC CO LTD22 citations92
US6977616B2Dec 20, 2005

Dual-band antenna having small size and low-height

ALPS ELECTRIC CO LTD20 citations92
US6958732B2Oct 25, 2005

Small-sized and high-gained antenna-integrated module

ALPS ELECTRIC CO LTD27 citations92
US6946997B2Sep 20, 2005

Dual band antenna allowing easy reduction of size and height

ALPS ELECTRIC CO LTD22 citations92
US6879294B2Apr 12, 2005

Dual antenna capable of transmitting and receiving circularly polarized electromagnetic wave and linearly polarized electromagnetic wave

ALPS ELECTRIC CO LTD44 citations92
US6320554B1Nov 20, 2001

Feed horn having elliptic open end

ALPS ELECTRIC CO LTD20 citations92
US6124830ASep 26, 2000

Planar antenna

ALPS ELECTRIC CO LTD48 citations92
US7271777B2Sep 18, 2007

Antenna device with improved isolation characteristic

ALPS ELECTRIC CO LTD15 citations84
US7136024B2Nov 14, 2006

Slot antenna having high gain in zenith direction

ALPS ELECTRIC CO LTD16 citations84
US7106253B2Sep 12, 2006

Compact antenna device

ALPS ELECTRIC CO LTD11 citations84
US7091920B2Aug 15, 2006

Circular polarization slot antenna apparatus capable of being easily miniaturized

ALPS ELECTRIC CO LTD13 citations84
US6975272B2Dec 13, 2005

Circularly polarized wave antenna device suitable for miniaturization

ALPS ELECTRIC CO LTD16 citations84
US6552636B1Apr 22, 2003

Small-sized cylindrical waveguide bend having low reflection characteristic

ALPS ELECTRIC CO LTD14 citations84
US6501432B2Dec 31, 2002

Primary radiator capable of achieving both low reflection and low loss

ALPS ELECTRIC CO LTD16 citations84
US6353417B1Mar 5, 2002

Primary radiator in which the total length of dielectric feeder is reduced

ALPS ELECTRIC CO LTD16 citations84
US7046203B2May 16, 2006

Antenna device having miniaturized radiating conductor plate

ALPS ELECTRIC CO LTD7 citations74
US6452559B1Sep 17, 2002

Circular-Polarized-wave converter

ALPS ELECTRIC CO LTD11 citations74
US6437753B2Aug 20, 2002

Primary radiator suitable for size reduction and preventing deterioration of cross polarization characteristic

ALPS ELECTRIC CO LTD8 citations74
US6313808B1Nov 6, 2001

Freedhorn capable of receiving radio waves from plurality of neighboring satellites

ALPS ELECTRIC CO LTD9 citations74
US7440739B2Oct 21, 2008

Smart antenna device with increased operation speed and complex smart antenna device using smart antenna device

ALPS ELECTRIC CO LTD2 citations63
US7248226B2Jul 24, 2007

Compact antenna device radiating circularly polarized wave

ALPS ELECTRIC CO LTD2 citations63
US6624715B2Sep 23, 2003

Ultrawide-band linear-circular polarization converter

ALPS ELECTRIC CO LTD6 citations63
US6567054B2May 20, 2003

Primary radiator suitable for miniaturization

ALPS ELECTRIC CO LTD2 citations63
US6529089B2Mar 4, 2003

Circularly polarized wave generator using a dielectric plate as a 90° phase shifter

ALPS ELECTRIC CO LTD5 citations63
US6445356B1Sep 3, 2002

Primary radiator having reduced side lobe

ALPS ELECTRIC CO LTD2 citations63
US6437754B2Aug 20, 2002

Primary radiator having a shorter dielectric plate

ALPS ELECTRIC CO LTD2 citations63
US6301464B1Oct 9, 2001

Satellite broadcasting converter

ALPS ELECTRIC CO LTD3 citations63
US6580400B2Jun 17, 2003

Primary radiator having improved receiving efficiency by reducing side lobes

ALPS ELECTRIC CO LTD4 citations62
US6727779B2Apr 27, 2004

Converter for satellite communication reception having branching waveguide with L-shape probes

ALPS ELECTRIC CO LTD2 citations61
US8358235B2Jan 22, 2013

Wireless sensor device

ALPS ELECTRIC CO LTD1 citations52
US8358237B2Jan 22, 2013

Wireless sensor apparatus

ALPS ELECTRIC CO LTD0 citations42
US8358236B2Jan 22, 2013

Wireless sensor apparatus

ALPS ELECTRIC CO LTD0 citations42