Patent ID: 11862836
Assignee: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Field: Telecommunications (Electrical engineering)
Classification: CPC H | IPC H

Claim 7:
8. An electronic apparatus for unsynchronized Time Division Duplex (TDD) multi-band operation in a wireless communication system, the electronic apparatus comprising:
a first resonator arrangement comprising one or more resonators tuned for operating at a first frequency band, wherein a first terminal of the first resonator arrangement is coupled to an antenna element; and
a second resonator arrangement comprising one or more resonators tuned for operating at a second frequency band, wherein a first terminal of the second resonator arrangement is coupled to the antenna element; and
a tunable resonator arrangement comprising a first tunable resonator, a second tunable resonator, a third tunable resonator, a fourth tunable resonator, wherein:
first terminals of the first and second tunable resonators are coupled to a second terminal of the first resonator arrangement;
first terminals of the third and fourth tunable resonators are coupled to a second terminal of the second resonator arrangement;
second terminals of the second and third tunable resonators are coupled to a receiving frontend;
second terminals of the first and fourth tunable resonators are coupled to a transmitting frontend; and
the first, second, third and fourth tunable resonators in the tunable resonator arrangement are tuned according to different operating modes.