Source: http://www.google.com/patents/US7893881?ie=ISO-8859-1&dq=5,598,374
Timestamp: 2014-12-25 09:36:31
Document Index: 640634096

Matched Legal Cases: ['Application No. 0400203', 'Application No. 200580003849', 'Application No. 0400203', 'Application No. 2006', 'Application No. 10', 'Application No. 05704778', 'Application No. 200580003849', 'Application No. 0400203']

Patent US7893881 - Antenna device and portable radio communication device comprising such an ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsAn antenna device for a portable radio communication device operable in at least a first and a second frequency band, includes first and second electrically conductive planar radiating elements. The first radiating element has a feeding portion connectable to a feed device of the portable radio communication...http://www.google.com/patents/US7893881?utm_source=gb-gplus-sharePatent US7893881 - Antenna device and portable radio communication device comprising such an antenna deviceAdvanced Patent SearchPublication numberUS7893881 B2Publication typeGrantApplication numberUS 12/820,483Publication dateFeb 22, 2011Filing dateJun 22, 2010Priority dateFeb 2, 2004Fee statusPaidAlso published asCN1914765A, CN1914765B, DE602005013749D1, EP1714351A1, EP1714351B1, US7741998, US20090066584, US20100259455, WO2005074070A1Publication number12820483, 820483, US 7893881 B2, US 7893881B2, US-B2-7893881, US7893881 B2, US7893881B2InventorsAnders Thornell-PersOriginal AssigneeLaird Technologies AbExport CitationBiBTeX, EndNote, RefManPatent Citations (16), Non-Patent Citations (7), Classifications (17), Legal Events (4) External Links: USPTO, USPTO Assignment, EspacenetAntenna device and portable radio communication device comprising such an antenna deviceUS 7893881 B2Abstract An antenna device for a portable radio communication device operable in at least a first and a second frequency band, includes first and second electrically conductive planar radiating elements. The first radiating element has a feeding portion connectable to a feed device of the portable radio communication device. The second radiating element includes a grounding portion connectable to ground. A controllable switch is arranged between the first and second radiating elements for selectively interconnecting and disconnecting the radiating elements. The state of the switch is controlled by means of a control voltage input. A first filter is arranged between the feeding portion and the control voltage input, to block radio frequency signals. By providing a high pass filter between the first and second radiating elements above a ground plane, quad-band operation is provided with high efficiency in a physically small antenna device.
CROSS-REFERENCE TO RELATED APPLICATIONS This application is a continuation of U.S. patent application Ser. No. 10/597,192 filed Oct. 28, 2008, which issued Jun. 22, 2010 as U.S. Pat. No. 7,741,998 which, in turn, is a National Stage of International Application No. PCT/SE2005/000115 filed Feb. 1, 2005 (published Aug. 11, 2005 as WO2005/074070) claiming priority to Swedish Application No. 0400203 filed Feb. 2, 2004. The entire disclosure of the above applications are incorporated herein by reference.
BACKGROUND Internal antennas have been used for some time in portable radio communication devices. There are a number of advantages connected with using internal antennas, of which can be mentioned that they are small and light, making them suitable for applications wherein size and weight are of importance, such as in mobile phones. A type of internal antenna that is often used in portable radio communication devices is the so-called Planar Inverted F Antenna (PIFA).
SUMMARY OF THE INVENTION The invention is now described, by way of example, with reference to the accompanying drawings, in which:
Now turning to FIG. 2 a, it is shown therein how the two radiating elements 10, from an RF point of view operate as one single radiating element having a general C-shape. This is because the capacitor 32, operating as a high pass filter, functions as an �RF bridge� between the two radiating elements. Switch 30 in the form of a PIN diode is open, i.e., non-conductive in FIG. 2 a because the control voltage VSwitch is low, i.e. zero Volts. No DC current flows through the diode. The C-shape of the combined radiating elements in combination with the position of the feeding portion 12 makes the arrangement resonate at two frequencies, effectively making it suitable for dual band operation.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS5585810 *Apr 25, 1996Dec 17, 1996Murata Manufacturing Co., Ltd.Antenna unitUS6417813Jul 31, 2001Jul 9, 2002Harris CorporationFeedthrough lens antenna and associated methodsUS6862441 *Jun 9, 2003Mar 1, 2005Nokia CorporationTransmitter filter arrangement for multiband mobile phoneUS6930639Mar 14, 2003Aug 16, 2005The Board Of Trustees Of The Leland Stanford Junior UniversityDual-element microstrip patch antenna for mitigating radio frequency interferenceUS7057472Aug 12, 2002Jun 6, 2006Hitachi Metals, Ltd.Bypass filter, multi-band antenna switch circuit, and layered module composite part and communication device using themUS7741998Feb 1, 2005Jun 22, 2010Laird Technologies AbAntenna device and portable radio communication device comprising such an antenna deviceUS20080224942Sep 2, 2005Sep 18, 2008Amc Centurion AbAntenna Device and Portable Radio Communication Device Comprising Such an Antenna DeviceEP1237222A1Feb 27, 2001Sep 4, 2002TELEFONAKTIEBOLAGET LM ERICSSON (publ)Multiband transformation stage for a multiband r.f. switching deviceEP1361623A1May 8, 2002Nov 12, 2003Sony Ericsson Mobile Communications ABMultiple frequency bands switchable antenna for portable terminalsGB2335798A Title not availableJP2000236209A Title not availableJPH1168456A Title not availableJPH08186404A Title not availableJPH10190347A Title not availableJPH11298231A Title not availableWO2001020718A1Sep 4, 2000Mar 22, 2001Avantego AbAntenna arrangement* Cited by examinerNon-Patent CitationsReference1First Notification of Office Action from the State Intellectual Property Office of China dated Sep. 25, 2009, for Patent Application No. 200580003849.3 (3 pages).2International-Type Search Report dated Feb. 2, 2004, for Swedish Patent Application No. 0400203-6 (3 pages).3Japanese Office Action from the Japanese Patent Office dated Feb. 2, 2010, for Patent Application No. 2006-551007 (3 pages).4Korean Office Action from the Korean Patent Office dated Nov. 28, 2005, for Patent Application No. 10-2004-0007400 (4 pages).5Official Communication from the European Patent Office dated May 21, 2007, for European Patent Application No. 05704778.9 (6 pages).6Second Notification of Office Action from the State Intellectual Property Office of China dated Apr. 21, 2010, for Patent Application No. 200580003849.3 (7 pages).7Swedish Preliminary Examination Report dated Aug. 4, 2004, for Swedish Patent Application No. 0400203-6 (2 pages).Classifications U.S. Classification343/700.0MS, 343/876, 343/702International ClassificationH01Q1/38, H01Q5/00, H01Q, H01Q1/24, H01Q9/04, H01Q3/24Cooperative ClassificationH01Q1/243, H01Q5/0034, H01Q9/14, H01Q9/0421European ClassificationH01Q9/04B2, H01Q1/24A1A, H01Q5/00K2A2, H01Q9/14Legal EventsDateCodeEventDescriptionJul 29, 2014FPAYFee paymentYear of fee payment: 4Apr 18, 2014ASAssignmentEffective date: 20130726Owner name: SAMSUNG ELECTRONICS CO., LTD., KOREA, REPUBLIC OFFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FIRST TECHNOLOGIES, LLC;REEL/FRAME:032714/0206Aug 8, 2013ASAssignmentOwner name: FIRST TECHNOLOGIES, LLC, MISSOURIFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LAIRD TECHNOLOGIES AB;REEL/FRAME:030982/0716Effective date: 20130712Jun 22, 2010ASAssignmentEffective date: 20081017Owner name: LAIRD TECHNOLOGIES AB, SWEDENFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:THORNELL-PERS, ANDERS;REEL/FRAME:024574/0986RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google