# US 12,592,475 B2 · Antenna structure and display device including the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,592,475 B2 - Document ID: US12592475B2 - Status: Granted - Kind: B2 - Application number: 18/131,922 - Filed: 2023-04-07 - Published: 2023-10-12 - Granted: 2026-03-31 - Earliest claimed: 2022-04-08 - Assignees: Dongwoo Fine-Chem Co., Ltd. - Applicants: Dongwoo Fine-Chem Co., Ltd. - Inventors: Dae Kyu Kim; In Kak Song; Han Sub Ryu - Web page: https://patentgrep.com/patent/US12592475B2 ## CPC - H01Q 1/243: {with built-in antennas} - 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: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) ## Abstract An antenna structure according to an embodiment includes an antenna device including an antenna unit, a circuit board electrically connected to the antenna unit, an insulating layer covering the antenna device and a portion of the circuit board, and an air layer formed between the antenna device and the insulating layer to partially cover the antenna unit. ## Claims ### Claim 1 An antenna structure, comprising: an antenna device comprising an antenna unit; a circuit board electrically connected to the antenna unit comprising a radiator, a transmission line connected to the radiator, and a signal pad connected to the transmission line and bonded to the circuit board; an insulating layer covering the antenna device and a portion of the circuit board; and an air layer formed between the antenna device and the insulating layer to partially cover the antenna unit, wherein the antenna device has a bonding area overlapping the circuit board in a plan view and a non-bonding area not overlapping the circuit board in the plan view, and the air layer is not formed on the bonding area and partially covers the non-bonding area. ### Claim 2 (depends on 1) The antenna structure of claim 1, wherein the air layer covers at least a portion of the transmission line. ### Claim 3 (depends on 2) The antenna structure of claim 2, wherein the air layer entirely covers the transmission line and partially covers the radiator. ### Claim 4 (depends on 2) The antenna structure of claim 2, wherein the air layer does not cover the radiator. ### Claim 5 (depends on 2) The antenna structure of claim 2, wherein the transmission line comprises a first transmission line and a second transmission line facing each other, and the air layer commonly covers the first transmission line and the second transmission line. ### Claim 6 (depends on 1) The antenna structure of claim 1 wherein the air layer is formed along a portion of a boundary of the antenna unit in a plan view. ### Claim 7 (depends on 1) The antenna structure of claim 1, wherein the air layer partially covers a sidewall of the circuit board. ### Claim 8 (depends on 1) The antenna structure of claim 1, wherein the antenna device comprises a plurality of the antenna units, and the air layer comprises a plurality of air caps covering each of the plurality of antenna units. ### Claim 9 (depends on 1) The antenna structure of claim 1, wherein a thickness of the air layer is smaller than a thickness of the circuit board. ### Claim 10 (depends on 1) The antenna structure of claim 1, wherein a thickness of the air layer decreases as a distance from the circuit board increases. ### Claim 11 (depends on 1) The antenna structure of claim 1, wherein a ratio of a thickness of the circuit board relative to a thickness of the insulating layer is in a range from 0.3 to 2.5. ### Claim 12 (depends on 1) The antenna structure of claim 1, wherein the circuit board comprises a core layer, and a circuit wiring disposed on one surface of the core layer and connected to the antenna device. ### Claim 13 (depends on 12) The antenna structure of claim 12, further comprising a conductive intermediate structure bonding the antenna device and the circuit wiring with each other. ### Claim 14 (depends on 1) The antenna structure of claim 1, wherein the insulating layer includes an optically clear adhesive (OCA) or an optically clear resin (OCR). ### Claim 15 (depends on 1) A display device comprising the antenna structure according to claim 1. ### Claim 16 (depends on 15) The display device of claim 15, wherein the display device has a display area and a peripheral area, and the air layer is disposed in the peripheral area. ### Claim 17 An antenna structure, comprising: an antenna device comprising an antenna dielectric layer, and an antenna unit disposed on the antenna dielectric layer; a circuit board electrically connected to the antenna unit; a conductive intermediate structure disposed between the antenna unit and the circuit board; an insulating layer covering the antenna device and a portion of the circuit board; and an air layer formed between the antenna device and the insulating layer to partially cover the antenna unit, wherein the circuit board is electrically connected to the antenna unit via the conductive intermediate structure.