# US 2016/0190690 A1 · Multiband slot antenna system and apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0190690 A1 - Document ID: US20160190690A1 - Status: Published application - Kind: A1 - Application number: 14/969,908 - Filed: 2015-12-15 - Published: 2016-06-30 - Earliest claimed: 2014-12-17 - Assignees: Vertu Limited - Applicants: Vertu Corporation Limited - Inventors: Baha Badran; Zidong Liu - Web page: https://patentgrep.com/patent/US20160190690A1 ## CPC - H01Q 5/15: for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements - H01Q 1/243: {with built-in antennas} - H01Q 1/42: Housings not intimately mechanically associated with radiating elements, e.g. radome - H01Q 1/521: {reducing the coupling between adjacent antennas} - H01Q 5/378: Combination of fed elements with parasitic elements - H01Q 9/30: with feed to end of elongated active element, e.g. unipole (H01Q9/44 takes 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 An apparatus comprises an antenna ground plane; a conductive side element, a first antenna resonating element; a second antenna resonating element; and a slot-based antenna element formed from slot structures between the conductive side element and the conductive housing element. At least two RF switches are loaded with lump loads, located across the slot-based antenna element and dividing the slot-based antenna element to sections. A first antenna resonating element capacitively coupled to the slot-based antenna element, and forming a first antenna operating at a first frequency; the second antenna resonating element capacitively coupled to the slot-based antenna element, and forming a second antenna operating at a second frequency; and wherein the first and the second frequency are configured to be tuned at different frequencies based on a lump load switched by the first and the second RF switches. ## Claims ### Claim 1 Apparatus, comprising: an antenna ground plane; a conductive side element; a first antenna resonating element; a second antenna resonating element; a slot-based antenna element formed from slot structures adjacent to the conductive side element, wherein the slot structures having slot open ends; at least two radio-frequency (RF) switches loaded with a plurality of grounded lump loads, the switches located across the slot-based antenna element and dividing the slot-based antenna element to a first section extending from a first slot open end to a first switch, a second section extending from the first switch to a second switch, and a third section extending from the second switch to a second slot open end; wherein the first antenna resonating element capacitively coupled at least to the first section of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a first antenna operating at a first frequency; the second antenna resonating element capacitively coupled at least to the third section of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a second antenna operating at a second frequency; and wherein the first and the second frequency are configured to be tuned at different frequencies based on a lump load switched by the first and the second radio-frequency (RF) switches. ### Claim 2 (depends on 1) The apparatus of claim 1, wherein the slot-based antenna element being further divided to a fourth section extending from the second slot open end to a slot close end; and the second antenna resonating element capacitively coupled to the fourth section of the slot-based antenna element, and forming together with the antenna ground plane a third antenna operating at a third frequency. ### Claim 3 (depends on 1) The apparatus of claim 1, wherein the first switch being connected to a zero-reactance load; the first antenna resonating element capacitively coupled to the first section of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a first antenna operating at a first frequency; and the second antenna resonating element capacitively coupled to the second and the third sections of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a second antenna operating at a second frequency; wherein the second frequency being configured to be tuned at different frequencies based on a lump load switched by the second radio-frequency (RF) switch. ### Claim 4 (depends on 1) The apparatus of claim 1, wherein the second switch being connected to a zero-reactance load; and the first antenna resonating element capacitively coupled to the first and the second sections of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a first antenna operating at a first frequency; wherein the first frequency being configured to be tuned at different frequencies based on a lump load switched by the first radio-frequency (RF) switch; and the second antenna resonating element capacitively coupled to the third and the fourth sections of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a second antenna operating at a second and a third frequency. ### Claim 5 (depends on 1) The apparatus of claim 1, wherein coupling between the first and the second antenna resonating element being optimized by changing the reactance of the lump loads. ### Claim 6 An electronic device, comprising: an antenna ground plane; a conductive side element; a first antenna resonating element; a second antenna resonating element; a slot-based antenna element formed from slot structures adjacent to the conductive side element, wherein the slot structures having slot open ends; at least two radio-frequency (RF) switches loaded with a plurality of grounded lump loads, the switches located across the slot-based antenna element and dividing the slot-based antenna element to a first section extending from a first slot open end to a first switch, a second section extending from the first switch to a second switch, and a third section extending from the second switch to a second slot open end; wherein the first antenna resonating element capacitively coupled at least to the first section of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a first antenna operating at a first frequency; the second antenna resonating element capacitively coupled at least to the third section of the slot-based antenna element, and forming together with the antenna ground plane and the conductive side element, a second antenna operating at a second frequency; and wherein the first and the second frequency are configured to be tuned at different frequencies based on a lump load switched by the first and the second radio-frequency (RF) switches. ### Claim 7 (depends on 6) The device of claim 6, further comprising a support element comprising a circuit board, or a body part of the device. ### Claim 8 (depends on 6) The device of claim 6, further comprising a housing comprising a conductive housing element connected to the antenna ground plane. ### Claim 9 (depends on 6) The device of claim 6, wherein the conductive side element comprising elongated housing element configured to provide a part of an external surface of the device. ### Claim 10 (depends on 7) The device of claim 7, wherein the support element is connected to the antenna ground plane. ### Claim 11 (depends on 7) The device of claim 7, wherein the support element is arranged above the antenna ground plane. ### Claim 12 (depends on 6) The device of claim 6, wherein the first and the second antenna resonating elements comprising elongated antenna resonating elements. ### Claim 13 (depends on 12) The device of claim 12, wherein the elongated antenna resonating elements being parallel to each other. ### Claim 14 (depends on 12) The device of claim 12, wherein the elongated antenna resonating elements being parallel to the elongated conductive housing element. ### Claim 15 (depends on 7) The device of claim 7, wherein the first and the second antenna resonating elements being attached to the support element. ### Claim 16 (depends on 15) The device of claim 15, wherein the support element comprising a first feed point for feeding the first antenna resonating element and a second feed point for feeding the second antenna resonating element. ### Claim 17 (depends on 15) The device of claim 15, wherein the first and the second antenna resonating elements being attached to an edge area of the support element. ### Claim 18 (depends on 8) The device of claim 8, wherein the conductive housing element comprising a rail, a chassis, a plate or a side frame of the device made of metal. ### Claim 19 (depends on 6) The device of claim 6, wherein the slot-based antenna element being further divided to a fourth section extending from the second slot open end to a slot close end; the second antenna resonating element capacitively coupled to the fourth section of the slot-based antenna element, and forming together with the antenna ground plane a third antenna operating at a third frequency; and a metal back cover being placed above the fourth section of the slot-based antenna element. ### Claim 20 (depends on 6) The device of claim 6, wherein a display, a touch sensor and signal tracks are placed at an inner side of the slot-based antenna element to reduce interference with the slot-based antenna element.