# US 11,121,699 B2 · Wideband filter with resonators and inductors

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- Number: US 11,121,699 B2
- Document ID: US11121699B2
- Status: Granted
- Kind: B2
- Application number: 16/279,902
- Filed: 2019-02-19
- Published: 2020-08-20
- Granted: 2021-09-14
- Earliest claimed: 2019-02-19
- Assignees: QUALCOMM Incorporated
- Applicants: QUALCOMM Incorporated
- Inventors: Kai Liu; Rui Tang; Changhan Hobie Yun; Mario Francisco Velez; Jonghae Kim
- Web page: https://patentgrep.com/patent/US11121699B2

## CPC

- H03H 9/542: {including passive elements (H03H9/545 takes precedence)}
- H01P 1/20309: {with dielectric resonator}
- H01P 1/20381: {Special shape resonators}
- H03H 3/02: for the manufacture of piezoelectric or electrostrictive resonators or networks (H03H3/08 takes precedence)
- H03H 9/0542: {consisting of a lateral arrangement (H03H9/0566 takes precedence)}
- H03H 9/0547: {consisting of a vertical arrangement (H03H9/0566 takes precedence)}
- H10W 20/20: Interconnections within wafers or substrates, e.g. through-silicon vias [TSV]
- H10W 20/497: {Inductive arrangements or effects of, or between, wiring layers}
- H10W 44/20: at high-frequency [HF] or radio frequency [RF]
- H10W 70/692: Ceramics or glasses
- H10W 44/209: {Vertical interconnections, e.g. vias}
- H10W 44/241: {for passive devices or passive elements}
- H10W 72/0198: {batch processes}
- H10W 90/724: {between a chip and a stacked insulating package substrate, interposer or RDL}
- H03H: IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (waveguides, resonators, lines or other devices of the waveguide type H01P)
- H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B)
- H10W: GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10

## Abstract

Aspects of the disclosure are directed to a bandpass filter including a first, second, third and fourth resonators, wherein the second and third resonators are in parallel, wherein the first resonator includes a first and second terminals, wherein the second resonator includes a second resonator top terminal and a second resonator bottom terminal, wherein the third resonator includes a third resonator top terminal and a third resonator bottom terminal, wherein the fourth resonator includes a third terminal and a fourth terminal; wherein the first terminal is coupled to the second resonator top terminal, wherein the second terminal is coupled to the third resonator top terminal, wherein the third terminal is coupled to the third resonator bottom terminal, wherein the fourth terminal is coupled to the second resonator bottom terminal; a first inductor coupled to the first and third terminals; and a second inductor coupled to the second and fourth terminals.

## Claims

### Claim 1

A bandpass filter in an integrated circuit (IC) comprising:
a plurality of resonators including a first resonator, a second resonator, a third resonator and a fourth resonator, and wherein the second resonator and the third resonator are in parallel, and
wherein the first resonator includes a first terminal and a second terminal,
wherein the second resonator includes a second resonator top terminal and a second resonator bottom terminal;
wherein the third resonator includes a third resonator top terminal and a third resonator bottom terminal,
wherein the fourth resonator includes a third terminal and a fourth terminal, and
wherein the first terminal is coupled to the second resonator top terminal,
wherein the second terminal is coupled to the third resonator top terminal,
wherein the third terminal is coupled to the third resonator bottom terminal,
wherein the fourth terminal is coupled to the second resonator bottom terminal; and
a first inductor coupled to the first terminal and the third terminal; and
a second inductor coupled to the second terminal and the fourth terminal; and
a first resistor connected in parallel with the first inductor and a second resistor connected in parallel with the second inductor.

### Claim 2 (depends on 1)

The bandpass filter in an integrated circuit (IC) of claim 1, wherein an impedance of the first resistor and the second resistor is approximately 50 ohms.