Samsung Electro-mechanics Co., Ltd.

Jung Woo Sung

Sung Tae Kim

Won Kyu Jeung

Yoon Sok Park

Won Jin Baek

Chang Hyun Kim

Hyung Joon Kim

Chan Hee Park

Dong Hoe Kim

Mu Seon Woo

Sung-Tae Kim

An acoustic resonator filter includes: a series unit including at least one series acoustic resonator electrically connected, in series, between first and second ports configured to pass a radio frequency (RF) signal; a first shunt unit disposed on a first shunt connection path between the at least one series acoustic resonator and a ground, the first shunt unit including a plurality of shunt acoustic resonators connected to each other in series and having different resonance frequencies; and a second shunt unit disposed in a second shunt connection path between the at least one series acoustic resonator and the ground, the second shunt unit including at least one shunt acoustic resonator and having higher inductance than inductance of the first shunt unit.

Acoustic resonator filter

An acoustic resonator filter includes at least one series acoustic resonator electrically connected between a first port and a second port in series, through which a radio frequency (RF) signal passes; at least one second shunt acoustic resonator electrically shunt-connected between the at least one series acoustic resonator and a ground; and at least one first shunt acoustic resonator electrically shunt-connected between the at least one series acoustic resonator and a ground and having a resonance frequency higher than a resonance frequency of the at least one second shunt acoustic resonator. At least one shunt acoustic resonator, among the at least one first shunt acoustic resonator and the at least one second shunt acoustic resonator has a temperature coefficient of frequency (TCF) corresponding to resonance frequency sensitivity more insensitive than resonance frequency sensitivity according to a change in temperature of the at least one series acoustic resonator filter.

A filter includes: series resonators disposed between an input terminal and an output terminal; and shunt resonators disposed at different nodes between the input terminal and the output terminal, wherein a resonance frequency and an antiresonance frequency of at least one series resonator among the series resonators are respectively located within a reference frequency range of a resonance frequency and an antiresonance frequency of the shunt resonators.

Filter including acoustic wave resonator

A filter includes a plurality of series portions each including one or more series resonators, and a plurality of shunt portions each including one or more shunt resonators. At least one of the plurality of shunt portions includes two shunt resonators connected to each other in anti-series, and antiresonance frequencies of the two shunt resonators are arranged externally of a passband.

Filter including bulk-acoustic wave resonator

A filter includes a multilayer structure having films configured as bulk acoustic wave resonators; a wiring line connected to the bulk acoustic wave resonators; a cap coupled to the multilayer structure on a bonding line; and the filtering characteristics of the filter being configured through a mutual inductance between the wiring line and the bonding line.

Filter including bulk acoustic wave resonator

A filter may include a plurality of bulk acoustic wave resonators including one or more series resonators and one or more shunt resonators formed by a first electrode, a piezoelectric layer, and a second electrode sequentially stacked on a substrate, a cap accommodating the plurality of bulk acoustic wave resonators therein, and one or more switches provided on the cap.

Filter and front end module including the same

A filter includes a multilayer structure comprising films and forming bulk acoustic wave resonators, a cap accommodating the bulk acoustic wave resonators and bonded to the multilayer structure, a bonding agent disposed in a bonded area between the multilayer structure and the cap and comprising a bonding layer, and a shielding layer disposed on an inner surface of the cap and comprising a same material as at least a portion of the bonding layer.

A filter comprises a series unit, and a shunt unit disposed between the series unit and a ground. The shunt unit includes resonators that are selectively operated, and each of the shunt resonators includes a film bulk acoustic resonator.

Variable frequency filter

A matching module includes an inductor pattern including a first inductor pattern and a second inductor pattern, each respectively provided in a spiral shape, and a connection pattern connecting the first inductor pattern and the second inductor pattern and provided in a central region of a dielectric sheet, and a capacitor pattern provided in an edge region of the dielectric sheet and configured to form mutual capacitance with the inductor pattern, wherein rotational directions of the first inductor pattern and the second inductor pattern that are provided in the spiral shape are the same.

Matching module

A filter module includes filters. Each of the filters is configured to control communications bands having overlapping bandwidths each with the other. Each of the communications bands, allocated to any one of the filters, has a different limit frequency from the other.

Growing community of inventors

Suwon-si, South Korea

Jung Woo Sung