# US 11,309,620 B2 · Dual-band antenna and wireless communications device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,309,620 B2 - Document ID: US11309620B2 - Status: Granted - Kind: B2 - Application number: 16/204,564 - Filed: 2018-11-29 - Published: 2019-05-30 - Granted: 2022-04-19 - Earliest claimed: 2017-11-29 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Xinghui Ji; Bo Yuan; Rui Hua - Web page: https://patentgrep.com/patent/US11309620B2 ## CPC - H01Q 1/2291: {used in Bluetooth® or Wi-Fi® devices of Wireless Local Area Networks [WLAN] (H01Q1/241 takes precedence; WLAN in general H04W)} - H01Q 1/38: formed by a conductive layer on an insulating support {(patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142)} - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 5/30: Arrangements for providing operation on different wavebands - H01Q 5/42: using two or more imbricated arrays (H01Q5/49 takes precedence) - H01Q 9/065: {Microstrip dipole antennas (patch antenna H01Q9/0407)} - H01Q 9/16: with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole (H01Q9/44 takes precedence) - H01Q 15/008: {said selective devices having Sievenpipers' mushroom elements} - H01Q 19/108: {Combination of a dipole with a plane reflecting surface (H01Q19/106 takes precedence; strip line H01Q9/065)} - H01Q 21/0075: {Stripline fed arrays (H01Q21/065 takes precedence)} - H01Q 21/062: {using dipole aerials; (H01Q21/067, H01Q21/068 take precedence)} - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract A dual-band antenna and a wireless communications device, where the dual-band antenna includes a first antenna arranged on a first printed circuit board (PCB), a second antenna arranged on a second PCB, and a reflection panel. An operating frequency band of the first antenna is a first frequency band. An operating frequency band of the second antenna is a second frequency band. The first frequency band is higher than the second frequency band. The second PCB is disposed between the first PCB and the reflection panel. The reflection panel includes an artificial magnetic conductor. A resonant frequency band of the artificial magnetic conductor includes the second frequency band. The first frequency band is outside the resonant frequency band. The dual-band antenna has a small size. ## Claims ### Claim 1 A dual-band antenna comprising: a first printed circuit board (PCB); a first antenna arranged on the first PCB, wherein a first operating frequency band of the first antenna is a first frequency band; a second PCB; a second antenna arranged on the second PCB, wherein a second operating frequency band of the second antenna is a second frequency band that is lower than the first frequency band, and wherein both the first antenna and the second antenna are dipole antennas; and a reflection panel serving as a reflector for the first antenna and the second antenna, comprising an artificial magnetic conductor, and positioned such that the second PCB is disposed between the first PCB and the reflection panel, wherein a resonant frequency band of the artificial magnetic conductor comprises the second frequency band, and wherein the first frequency band is outside the resonant frequency band. ### Claim 2 (depends on 1) The dual-band antenna of claim 1, wherein a projection of the first antenna on the second PCB partially covers the second antenna. ### Claim 3 (depends on 2) The dual-band antenna of claim 2, wherein the second antenna comprises a first element, a second element, and a power divider, a first branch of the power divider is connected to the first element, and a second branch of the power divider is connected to the second element, the first element is covered by the projection of the first antenna on the second PCB, at least one part of the second element is outside the projection of the first antenna on the second PCB, and a length of the second branch is greater than a length of the first branch. ### Claim 4 (depends on 1) The dual-band antenna of claim 1, wherein a projection of the first antenna on the second PCB partially covers the second antenna, the first antenna comprises a plurality of elements, the plurality of elements of the first antenna are arranged at an edge of the first PCB, the second antenna comprises a plurality of elements, and projections of centers of the plurality of elements of the second antenna on the first PCB are located within a graph enclosed by centers of the plurality of elements of the first antenna. ### Claim 5 (depends on 4) The dual-band antenna of claim 4, wherein each of the plurality of elements of the second antenna comprises a first element, a second element, and a power divider, a first branch of the power divider is connected to the first element, a second branch of the power divider is connected to the second element, the first element is covered by the projection of the first antenna on the second PCB, at least one part of the second element is outside the projection of the first antenna on the second PCB, and a length of the second branch is greater than a length of the first branch. ### Claim 6 (depends on 1) The dual-band antenna of claim 1, wherein the first antenna and the second antenna are microstrip antennas. ### Claim 7 (depends on 5) The dual-band antenna of claim 5, wherein a frequency of the first frequency band is a multiple of a frequency of the second frequency band, each of the plurality of elements of the first antenna comprises a plurality of dipole microstrip elements, high power is allocated to a dipole microstrip element, of the plurality of dipole microstrip elements, that is in a central position, and low power is allocated to a dipole microstrip element, of the plurality of dipole microstrip elements, that is in a surrounding position. ### Claim 8 (depends on 1) The dual-band antenna of claim 1, wherein the reflection panel is a conductor ground panel configured to cooperate with the first antenna and the second antenna. ### Claim 9 (depends on 1) The dual-band antenna of claim 1, wherein the first PCB, the second PCB, and the reflection panel are parallel to each other. ### Claim 10 A wireless communications device comprising: a dual-band antenna comprising: a first printed circuit board (PCB); a first antenna arranged on the first PCB, wherein an operating frequency band of the first antenna is a first frequency band; a second PCB; a second antenna arranged on the second PCB, wherein an operating frequency band of the second antenna is a second frequency band that is lower than the first frequency band, and wherein both the first antenna and the second antenna are dipole antennas; and a reflection panel serving as a reflector for the first antenna and the second antenna, comprising an artificial magnetic conductor, and positioned such that the second PCB is disposed between the first PCB and the reflection panel, wherein a resonant frequency band of the artificial magnetic conductor comprises the second frequency band, and wherein the first frequency band is outside the resonant frequency band; a first radio frequency circuit connected to the first antenna, wherein an operating frequency band of the first radio frequency circuit is the first frequency band; and a second radio frequency circuit connected to the second antenna, wherein an operating frequency band of the first radio frequency circuit is the second frequency band. ### Claim 11 (depends on 10) The wireless communications device of claim 10, wherein a projection of the first antenna on the second PCB partially covers the second antenna. ### Claim 12 (depends on 11) The wireless communications device of claim 11, wherein the second antenna comprises a first element, a second element, and a power divider, a first branch of the power divider is connected to the first element, a second branch of the power divider is connected to the second element, the first element is covered by the projection of the first antenna on the second PCB, at least one part of the second element is outside the projection of the first antenna on the second PCB, and a length of the second branch is greater than a length of the first branch. ### Claim 13 (depends on 10) The wireless communications device of claim 10, wherein a projection of the first antenna on the second PCB partially covers the second antenna, the first antenna comprises a plurality of elements, the plurality of elements of the first antenna are arranged at an edge of the first PCB, the second antenna comprises a plurality of elements, and projections of centers of the plurality of elements of the second antenna on the first PCB are located within a graph enclosed by centers of the plurality of elements of the first antenna. ### Claim 14 (depends on 13) The wireless communications device of claim 13, wherein each of the plurality of elements of the second antenna comprises a first element, a second element, and a power divider, a first branch of the power divider is connected to the first element, a second branch of the power divider is connected to the second element, the first element is covered by the projection of the first antenna on the second PCB, at least one part of the second element is outside the projection of the first antenna on the second PCB, and a length of the second branch is greater than a length of the first branch. ### Claim 15 (depends on 14) The wireless communications device of claim 14, wherein a frequency of the first frequency band is a multiple of a frequency of the second frequency band, each of the plurality of elements of the first antenna comprises a plurality of dipole microstrip elements, high power is allocated to a dipole microstrip element, of the plurality of dipole microstrip elements, that is in a central position, and low power is allocated to a dipole microstrip element, of the plurality of dipole microstrip elements, that is in a surrounding position. ### Claim 16 (depends on 10) The wireless communications device of claim 10, wherein the first antenna and the second antenna are microstrip antennas. ### Claim 17 (depends on 10) The wireless communications device of claim 10, wherein the reflection panel is a conductor ground panel configured to cooperate with the first antenna and the second antenna. ### Claim 18 (depends on 17) The wireless communications device of claim 17, wherein the first antenna and the second antenna are configured to generate electromagnetic waves, and wherein the reflection panel is further configured to provide directivity of the electromagnetic waves. ### Claim 19 (depends on 10) The wireless communications device of claim 10, wherein the first PCB, the second PCB, and the reflection panel are parallel to each other. ### Claim 20 (depends on 8) The dual-band antenna of claim 8, wherein the first antenna and the second antenna are configured to generate electromagnetic waves, and wherein the reflection panel is further configured to provide directivity of the electromagnetic waves.