US 11,862,836 B2
Radio unit for unsynchronized TDD multi-band operation
Youping Su, Täby (SE); and Jichang Liao, Sollentuna (SE)
Assigned to Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
Appl. No. 17/272,237
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Aug. 27, 2018, PCT No. PCT/SE2018/050858
§ 371(c)(1), (2) Date Feb. 26, 2021,
PCT Pub. No. WO2020/046180, PCT Pub. Date Mar. 5, 2020.
Prior Publication US 2021/0399395 A1, Dec. 23, 2021
Int. Cl. H01P 1/213 (2006.01); H01P 5/12 (2006.01); H04L 5/14 (2006.01)
CPC H01P 1/2138 (2013.01) [H01P 5/12 (2013.01); H04L 5/14 (2013.01)] 14 Claims
OG exemplary drawing
 
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.