TELECOMMUNICATIONS DEVICE COMPRISING AN EBD CIRCUIT, A TUNABLE IMPEDANCE NETWORK AND A METHOD FOR TUNING A TUNABLE IMPEDANCE NETWORK

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(11)

EP 3 121 968 A8

(12)	CORRECTED EUROPEAN PATENT APPLICATION
	Note: Bibliography reflects the latest situation

(15)	Correction information:
	Corrected version no 1 (W1 A1)

(48)	Corrigendum issued on:
	05.04.2017 Bulletin 2017/14

(43)	Date of publication:
	25.01.2017 Bulletin 2017/04

(21)	Application number: 15178340.4

(22)	Date of filing: 24.07.2015

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International Patent Classification (IPC):

H04B 1/18^(2006.01)

H04B 1/52^(2015.01)

(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

(71)	Applicants:
	IMEC vzw 3001 Heverlee (BE) Vrije Universiteit Brussel 1050 Brussel (BE)

(72)	Inventors:
	Hershberg, Benjamin Poris 3001 Heverlee (BE) van Liempd, Barend 3001 Heverlee (BE) Craninckx, Jan 3001 Heverlee (BE)

(74)	Representative: Gevers Patents
	Intellectual Property House Holidaystraat 5 1831 Diegem 1831 Diegem (BE)

(54)	TELECOMMUNICATIONS DEVICE COMPRISING AN EBD CIRCUIT, A TUNABLE IMPEDANCE NETWORK AND A METHOD FOR TUNING A TUNABLE IMPEDANCE NETWORK

(57) Telecommunications device comprising: an electrical-balance duplexer, EBD, circuit coupled to at least one output node of a transmit path (TXin), an antenna, and at least one input node of a receive path (RXout), the EBD circuit being configured to isolate the transmit path from the receive path by signal cancellation, and a balancing network (Zbal) as part of the EBD circuit. The balancing network is an integrated tunable impedance network configured to provide an impedance that matches a target impedance (Zant) associated with the antenna at a first frequency and simultaneously at a second, different frequency. The network comprises a first portion and a second portion, the first portion reducing the influence of the tuning of the second portion at the first frequency. The network preferably comprises no explicit resistors.