# US 2020/0287293 A1 · Slot array antenna including parasitic features > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2020/0287293 A1 - Document ID: US20200287293A1 - Status: Published application - Kind: A1 - Application number: 16/294,528 - Filed: 2019-03-06 - Published: 2020-09-10 - Earliest claimed: 2019-03-06 - Assignees: Aptiv Technologies AG - Applicants: Aptiv Technologies Limited - Inventors: Shawn Shi; Mingjian Li - Web page: https://patentgrep.com/patent/US20200287293A1 ## CPC - H01Q 21/005: {Slotted waveguides arrays} - H01Q 21/064: {using horn or slot aerials (slotted waveguides arrays H01Q21/005)} - H01P 3/121: {integrated in a substrate} - H01Q 1/523: {between antennas of an array} - H01Q 13/10: Resonant slot antennas - H01Q 13/22: Longitudinal slot in boundary wall of waveguide or transmission line {(H01Q13/203 takes precedence)} - H01Q 21/0093: {Monolithic arrays} - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H01P: WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE (operating at optical frequencies G02B) ## Abstract An illustrative example antenna device includes a substrate. A plurality of conductive members in the substrate establish a substrate integrated waveguide. A plurality of first and second slots are on an exterior surface of a first portion of the substrate. Each of the second slots is associated with a respective one of the first slots. The first and second slots are configured to establish a radiation pattern that varies across a beam of radiation emitted by the antenna device. A plurality of parasitic interruptions include slots on the exterior surface of a second portion of the substrate. The parasitic interruptions reduce ripple effects otherwise introduced by adjacent antennas. ## Claims ### Claim 1 An antenna device, comprising: a substrate; a plurality of conductive members in the substrate, the conductive members establishing a substrate integrated waveguide (SIW), a first portion of the substrate being within the SIW and a second portion of the substrate being outside the SIW; a plurality of first slots on an exterior surface of the first portion of the substrate; a plurality of second slots on the exterior surface of the first portion of the substrate, each of the second slots being associated with a respective one of the first slots, the first and second slots being configured to establish a radiation pattern that varies across a beam of radiation emitted by the antenna device; and a plurality of parasitic interruptions, at least a first one of the parasitic interruptions being on a first side of the SIW and at least a second one of the parasitic interruptions being on a second, opposite side of the SIW. ### Claim 2 (depends on 1) The antenna device of claim 1, wherein the parasitic interruptions respectively comprise a slot along an exterior surface of the second portion of the substrate; and at least one conductive connector establishing a conductive connection between the exterior surface of the second portion near two sides of the slot and a conductive layer near an opposite side of the substrate. ### Claim 3 (depends on 2) The antenna device of claim 2, wherein the at least one conductive connector comprises a plurality of conductive members. ### Claim 4 (depends on 2) The antenna device of claim 2, wherein the parasitic interruption slots have a depth corresponding to one-quarter of a guided wavelength. ### Claim 5 (depends on 2) The antenna device of claim 2, wherein the parasitic interruption slots are lined with a conductive material. ### Claim 6 (depends on 5) The antenna device of claim 5, wherein the conductive material comprises metal; and the conductive layer near the opposite side of the substrate comprises metal. ### Claim 7 (depends on 6) The antenna device of claim 6, wherein the metal is copper. ### Claim 8 (depends on 1) The antenna device of claim 1, wherein the first slots emit radiation having a first characteristic; and the second slots emit radiation having a second characteristic that is different than the first characteristic. ### Claim 9 (depends on 8) The antenna device of claim 8, wherein the first and second characteristics respectively comprise at least one of a power of emitted radiation, a phase of emitted radiation, or a gain of emitted radiation. ### Claim 10 (depends on 8) The antenna device of claim 8, wherein the first characteristic and the second characteristic bias a gain of the beam of radiation toward one side of the radiation pattern. ### Claim 11 (depends on 8) The antenna device of claim 8, wherein the first slots have a first length; the second slots have a second length; and the first and second characteristics are based on the first and second lengths, respectively. ### Claim 12 (depends on 1) The antenna device of claim 1, wherein a spacing between associated first and second slots varies along a length of the SIW. ### Claim 13 (depends on 12) The antenna device of claim 12, wherein the spacing controls a strength of radiation emitted through the associated first and second slots. ### Claim 14 (depends on 1) The antenna device of claim 1, wherein the substrate includes a plurality of SIWs; at least a first one of the parasitic interruptions is on a first side of each SIW; and at least a second one of the parasitic interruptions is on a second, opposite side of each SIW. ### Claim 15 (depends on 14) The antenna device of claim 14, wherein each SIW includes an input port between opposite ends of the SIW; at least some of the parasitic interruptions are on one side of a respective one of the input ports; and at least some others of the parasitic interruptions are on a different side of the respective one of the input ports. ### Claim 16 (depends on 14) The antenna device of claim 14, wherein the SIWs are aligned parallel to each other; the parasitic interruptions are parallel to the SIWs; an input port to at least one of the SIWs is situated between adjacent SIWs; and at least some of the parasitic interruptions are situated between adjacent SIWs. ### Claim 17 (depends on 1) The antenna device of claim 1, wherein a number of the parasitic interruptions on the first side of the SIW differs from a number of the parasitic interruptions on the second side of the SIW. ### Claim 18 (depends on 1) The antenna device of claim 1, wherein the exterior surface comprises a layer of metal. ### Claim 19 A method of making an antenna device, the method comprising: establishing a plurality of first slots on an exterior surface of a first portion of a substrate, the substrate including a substrate integrated waveguide (SIW), the first portion of the substrate being within the SIW and a second portion of the substrate being outside the SIW; establishing a plurality of second slots on the exterior surface of the first portion of the substrate, each of the second slots being associated with a respective one of the first slots, the first and second slots being configured to establish a radiation pattern that varies across a beam of radiation emitted by the antenna device; and establishing a plurality of parasitic interruptions, at least a first one of the parasitic interruptions being on a first side of the SIW and at least a second one of the parasitic interruptions being on a second, opposite side of the SIW. ### Claim 20 (depends on 19) The method of claim 19, wherein the exterior surface comprises a first conductive layer; and establishing the parasitic interruptions, respectively, comprises forming a slot along an exterior surface of the second portion of the substrate, lining the formed slot with a conductive material, and establishing a conductive connection between the exterior surface of the second portion near two sides of the slot and a conductive layer near an opposite side of the substrate.