# US 10,374,289 B2 · Reconfigurable 4-port multi-band multi-function antenna with a grounded dipole antenna component > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,374,289 B2 - Document ID: US10374289B2 - Status: Granted - Kind: B2 - Application number: 15/564,613 - Filed: 2016-04-07 - Published: 2018-03-15 - Granted: 2019-08-06 - Earliest claimed: 2015-04-07 - Assignees: Smart Antenna Technologies Ltd. - Applicants: Smart Antenna Technologies Ltd. - Inventors: Sampson Hu; Xiang Gao - Web page: https://patentgrep.com/patent/US10374289B2 ## CPC - H01Q 1/243: {with built-in antennas} - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 5/335: at the feed, e.g. for impedance matching - H01Q 5/50: Feeding or matching arrangements for broad-band or multi-band operation - H01Q 21/28: Combinations of substantially independent non-interacting antenna units or systems {(multiple beam H01Q25/00)} - H01Q 7/00: Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop - H01Q 9/26: with folded element or elements, the folded parts being spaced apart a small fraction of operating wavelength (resonant loop antennas H01Q7/00) - H01Q 9/40: Element having extended radiating surface - H01Q 9/42: with folded element, the folded parts being spaced apart a small fraction of the operating wavelength - H04B 7/0413: MIMO systems - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract There is disclosed a reconfigurable antenna device comprising a substrate having first and second opposed ends and first and second opposed side edges, the substrate incorporating a main groundplane. The antenna device further comprises a dipole antenna having first and second arms each having a proximal portion and a distal portion, the proximal portions extending substantially adjacent and parallel to the first end of the substrate and the distal portions respectively extending substantially adjacent and parallel to the first and second side edges of the substrate. Distal ends of the first and second arms are connected to the main groundplane or otherwise grounded. Additionally, there is provided a main chassis antenna having first and second arms extending substantially adjacent and parallel to the first end of the substrate. The main chassis antenna is configured for excitation by RF currents in the main groundplane. Finally, there are provided first and second auxiliary chassis antennas, the first auxiliary chassis antenna being disposed at the first end of the substrate substantially adjacent to the proximal portion of first arm of the dipole antenna and the first arm of the main chassis antenna, and the second auxiliary chassis antenna being disposed at the first end of the substrate substantially adjacent to the proximal portion of the second arm of the dipole antenna and the second arm of the main chassis antenna. The first and second auxiliary chassis antennas are configured for excitation by RF currents in the main groundplane. ## Claims ### Claim 1 A reconfigurable antenna device comprising: i) a substrate having first and second opposed ends and first and second opposed side edges, the substrate incorporating a main groundplane; ii) a dipole antenna having first and second arms each having a proximal portion and a distal portion, the proximal portions extending substantially adjacent and parallel to the first end of the substrate and the distal portions respectively extending substantially adjacent and parallel to the first and second side edges of the substrate, wherein distal ends of the first and second arms are connected to the main groundplane or otherwise grounded; iii) a main chassis antenna having first and second arms extending substantially adjacent and parallel to the first end of the substrate, the main chassis antenna being configured for excitation by RF currents in the main groundplane; and iv) first and second auxiliary chassis antennas, the first auxiliary chassis antenna being disposed at the first end of the substrate substantially adjacent to the proximal portion of first arm of the dipole antenna and the first arm of the main chassis antenna, and the second auxiliary chassis antenna being disposed at the first end of the substrate substantially adjacent to the proximal portion of the second arm of the dipole antenna and the second arm of the main chassis antenna, the first and second auxiliary chassis antennas being configured for excitation by RF currents in the main groundplane, wherein the first and second arms of the dipole antenna are substantially symmetrical about a longitudinal center line of the main groundplane. ### Claim 2 (depends on 1) The antenna device as claimed in claim 1, in combination with a casing of a handset, tablet, laptop or other computing device, the casing having an inside and an outside. ### Claim 3 (depends on 2) The antenna device as claimed in claim 2, wherein the arms of the dipole antenna incorporate conductive components of the casing. ### Claim 4 (depends on 2) The antenna device as claimed in claim 2, wherein the arms of the main chassis antenna incorporate conductive components of the casing. ### Claim 5 (depends on 2) The antenna device as claimed in claim 2, wherein the first and/or second auxiliary chassis antennas incorporate conductive components of the casing. ### Claim 6 (depends on 2) The antenna device as claimed in claim 2, wherein the arms of the dipole antenna incorporate conductive tracks formed on the inside of the casing. ### Claim 7 (depends on 2) The antenna device as claimed in claim 2, wherein the arms of the main chassis antenna incorporate conductive tracks formed on the inside of the casing. ### Claim 8 (depends on 2) The antenna device as claimed in claim 2, wherein the first and/or second auxiliary chassis antennas incorporate conductive tracks formed on the inside of the casing. ### Claim 9 (depends on 3) The antenna device as claimed in claim 3, wherein the conductive components are disposed on the outside of the casing. ### Claim 10 (depends on 1) The antenna device as claimed in claim 1, wherein the dipole antenna and the main chassis antenna are configured to excite modes that are substantially orthogonal to one another. ### Claim 11 (depends on 1) The antenna as claimed in claim 1, wherein an RF resonator is disposed between the first and second auxiliary chassis antennas to improve isolation therebetween. ### Claim 12 (depends on 1) The antenna device of claim 1, wherein each antenna has a respective feeding point. ### Claim 13 (depends on 12) The antenna device of claim 12, wherein the feeding points are located proximal each other to allow a single chip or integrated circuit to provide matching circuitry for all of the antennas. ### Claim 14 (depends on 1) The antenna device of claim 1, wherein the main groundplane substantially displays mirror symmetry about the longitudinal center line thereof. ### Claim 15 (depends on 14) The antenna device of claim 14, wherein the feeding points of the dipole antenna and the main chassis antenna are disposed on the center line. ### Claim 16 (depends on 15) The antenna device of claim 15, wherein the feeding points of the first and second auxiliary chassis antennas are disposed substantially symmetrically about the center line. ### Claim 17 (depends on 14) The antenna device of claim 14, wherein the first and second arms of the main chassis antenna are substantially symmetrical about the center line. ### Claim 18 (depends on 14) The antenna device of claim 14, wherein the first and second auxiliary chassis antennas are substantially symmetrical about the center line. ### Claim 19 (depends on 14) The antenna device of claim 14, wherein the dipole antenna is not provided with a balun. ### Claim 20 (depends on 19) The antenna device of claim 19, wherein the dipole antenna is fed by a first, active coaxial cable attached to the first arm, and wherein a dummy cable is attached to the second arm, the dummy cable being substantially symmetric with the active cable. ### Claim 21 (depends on 20) The antenna device of claim 20, wherein the cables follow paths defined, respectively, by the first and second arms of the dipole antenna. ### Claim 22 (depends on 14) The antenna device of claim 14, wherein the main chassis antenna is fed by a cable running along the center line of the main groundplane. ### Claim 23 (depends on 14) The antenna device of claim 14, wherein the first and second auxiliary chassis antennas are fed by first and second cables running substantially symmetrically along either side of the center line of the main groundplane. ### Claim 24 (depends on 1) The antenna device of claim 1, wherein the dipole antenna is provided with a balun. ### Claim 25 (depends on 1) The antenna device as claimed in claim 1, wherein each antenna is provided with at least one matching circuit. ### Claim 26 (depends on 25) The antenna device of claim 25, wherein at least one of the antennas is provided with multiple matching circuits and at least one switch to allow switching between the multiple matching circuits. ### Claim 27 (depends on 25) The antenna device of claim 25, wherein at least one of the matching circuits includes a variable or adjustable capacitor and/or inductor so as to allow the respective antenna to be tuned over a desired frequency range.