(19)

(11)

EP 3 555 958 A1

(12)

(43) Date of publication: 23.10.2019 Bulletin 2019/43 (21) Application number: 17928939.2 (22) Date of filing: 18.10.2017

(51) International Patent Classification (IPC):  H01Q 5/20(2015.01) (86) International application number: PCT/US2017/057184 (87) International publication number: WO 2019/078850 (25.04.2019 Gazette 2019/17)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA MD (71) Applicant: Hewlett-Packard Development Company, L.P. Houston, TX 77070 (US)	(72) Inventors: HUNG, Kuan-Jung Taipei City 11568 (TW) CHEN, Cheng-Chih Taipei City 11568 (TW) (74) Representative: Bryers LLP  7 Gay Street Bath, Bath and North East Somerset BA1 2PH Bath, Bath and North East Somerset BA1 2PH (GB)