(19)

(11)

EP 4 238 181 A1

(12)

(43) Date of publication: 06.09.2023 Bulletin 2023/36 (21) Application number: 21790229.5 (22) Date of filing: 11.10.2021

(51) International Patent Classification (IPC):  H01Q 1/42(2006.01) H04B 1/08(2006.01) H04B 1/03(2006.01) (52) Cooperative Patent Classification (CPC): H05K 7/186; H04B 1/036; H04B 1/08; H01Q 1/42; H01Q 1/12; H01Q 1/246 (86) International application number: PCT/GB2021/052617 (87) International publication number: WO 2022/090680 (05.05.2022 Gazette 2022/18)

(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: KH MA MD TN (30) Priority: 02.11.2020 GB 202017366 (71) Applicant: Communications Research & IP Holdings Ltd London SW5 0JP (GB)	(72) Inventors: SMATT, Ashley London SW5 0JP (GB) BLOOMFIELD, Ben London SW5 0JP (GB) SHEPPARD, Philip London WC2H (GB) (74) Representative: Potter Clarkson  Chapel Quarter Mount Street Nottingham NG1 6HQ Nottingham NG1 6HQ (GB)