CN112768930A - Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal - Google Patents

Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal Download PDF

Info

Publication number
CN112768930A
CN112768930A CN202011611458.2A CN202011611458A CN112768930A CN 112768930 A CN112768930 A CN 112768930A CN 202011611458 A CN202011611458 A CN 202011611458A CN 112768930 A CN112768930 A CN 112768930A
Authority
CN
China
Prior art keywords
antenna
slow wave
wave structure
strap
low frequency
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011611458.2A
Other languages
Chinese (zh)
Inventor
詹昌漫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenzhen City Xinfeng Weiye Technology Co ltd
Original Assignee
Shenzhen City Xinfeng Weiye Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenzhen City Xinfeng Weiye Technology Co ltd filed Critical Shenzhen City Xinfeng Weiye Technology Co ltd
Priority to CN202011611458.2A priority Critical patent/CN112768930A/en
Publication of CN112768930A publication Critical patent/CN112768930A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
    • H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
    • H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
    • H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/48—Earthing means; Earth screens; Counterpoises
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
    • H01Q1/521—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure reducing the coupling between adjacent antennas

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)

Abstract

The invention is applicable to the technical field of wireless communication. The invention discloses a slow wave structure for improving the low-frequency performance of an MIMO antenna and a miniaturized intelligent terminal, wherein the slow wave structure comprises discrete metal strips arranged on the upper surface and the lower surface of a PCB mainboard far away from one side of the antenna, each discrete metal strip comprises a plurality of metal strips, a gap is arranged between every two metal strips, the upper surface metal strip and the lower surface metal strip are distributed in a staggered mode, and the upper surface metal strip and the adjacent lower surface metal strip sequentially form a signal link through metal through holes. Because the relative path length of the ground current of the antenna can be prolonged through the slow wave structure, the antenna has enough ground size in a low frequency band below 1GHz, the effect on low frequency below 1GHz is very large, but the low frequency performance of the MIMO antenna can be improved because the antenna has no influence on high frequency (above 1 GHz) and several calls.

Description

Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal
Technical Field
The invention relates to the technical field of wireless communication, in particular to a slow wave structure for improving the low-frequency performance of an MIMO antenna and a miniaturized intelligent terminal.
Background
Over 30 years, terminal antennas have undergone a transition from external antennas to internal antennas, from single-frequency, narrow-band antennas to multi-frequency, wide-band antennas, and from single-antenna to MIMO (Multiple-Input Multiple-Output) antennas. The antenna forms are also mixed from the original monopole antenna to a monopole antenna, a planar inverted F antenna, a slot antenna, a loop antenna, and the like.
In order to improve the data transmission rate, communication quality and channel capacity of mobile communication, the MIMO antenna becomes a new requirement for antenna design of fourth generation mobile communication, and the MIMO antenna system has maximum channel capacity under ideal conditions, and only when the isolation between the antennas is higher and the correlation coefficient is smaller, the channel capacity of the MIMO antenna system can approach the theoretical peak value.
With the increasingly high requirements for the appearance of terminal products, in the 4G and 5G communication era, intelligent terminals become main tools for people to connect to the internet, and particularly in the internet of things and the internet of vehicles, the intelligent terminals are required to realize high-reliability and high-speed data transmission. MIMO antennas are a key technology to solve this problem, and are widely used in base stations and mobile terminals for 4G communications. The MIMO antenna system is characterized in that a transmitter or a receiver is provided with a plurality of antennas, and the transmission quality and the system capacity can be improved by utilizing the multipath property of a wireless channel on the premise of not increasing the transmission power and the system spectrum.
For a MIMO antenna system to have good performance, the antenna elements must be uncorrelated (low coupling), however, the space that can be reserved for antennas in a mobile device is very limited, so that the spatial distance between antennas cannot be greater than or equal to one wavelength. Thus, when a plurality of broadband antennas with low coupling are integrated in a portable device, the performance is poor, for example, when a wireless smart watch is arranged, the physical size is very small, and when 3-4 antennas are arranged at the same time, the performance of the low-frequency band of the antennas is poor because the space of the ground is insufficient. Taking a certain miniaturized terminal product as an example, when the size of the whole terminal product is 40mm x 40mm, the maximum physical size of the internal PCB main board is only 40mm x 40mm, the B2 and B4 high-frequency band efficiency of the antenna is about 45%, but because the physical size is too small and the space required by the layout of devices on the PCB main board is large, the size of the antenna is very small, so that the low-frequency band B12(700MHz) cannot meet the requirement, and the efficiency can only be about 9%.
Disclosure of Invention
The invention mainly solves the technical problem of providing a slow wave structure for improving the low-frequency performance of an MIMO antenna and a miniaturized intelligent terminal, wherein the slow wave structure can avoid the contradiction between the ground size and product miniaturization required by a miniaturized equipment antenna in a low frequency band, and the low frequency band performance of the antenna is improved.
In order to solve the above problems, the present invention provides a slow wave structure for improving the low frequency performance of a MIMO antenna, the slow wave structure includes discrete metal strips disposed on the upper and lower surfaces of a PCB main board far away from the antenna, each discrete metal strip includes a plurality of metal strips, a gap is disposed between each metal strip, wherein the upper metal strip and the lower metal strip are distributed in a staggered manner, and the upper metal strip and the adjacent lower metal strip sequentially form a signal link through metal vias.
Further, the low frequency band is 1GHz or less.
Further, the discrete metal strip comprises a long strip shape and a circular arc shape.
The invention also provides a slow wave structure for improving the low-frequency performance of the MIMO antenna, which comprises metal strips respectively arranged on the upper surface and the lower surface of each layer of the multilayer PCB mainboard far away from one side of the antenna along the thickness direction of the multilayer PCB mainboard, and the head and the tail of each metal strip sequentially form a signal link through metal via holes.
Further, the low frequency band is 1GHz or less.
The invention also provides a miniaturized intelligent terminal which comprises an MIMO antenna and at least one slow wave structure, wherein the slow wave structure comprises discrete metal strips arranged on the upper surface and the lower surface of a PCB mainboard far away from one side of the antenna, each discrete metal strip comprises a plurality of metal strips, a gap is arranged between every two metal strips, the upper surface metal strip and the lower surface metal strip are distributed in a staggered mode, and the upper surface metal strip and the adjacent lower surface metal strip sequentially form a signal link through metal through holes.
Further, the low frequency band is 1GHz or less.
Further, the discrete metal strip comprises a long strip shape and a circular arc shape.
The invention also provides a miniaturized intelligent terminal which comprises an MIMO antenna and at least one slow wave structure, wherein the slow wave structure comprises metal strips which are respectively arranged on the upper surface and the lower surface of each layer of the multilayer PCB mainboard, which is far away from one side of the antenna, along the thickness direction of the multilayer PCB mainboard, and the head and the tail of each metal strip sequentially form a signal link through metal through holes.
Further, the low frequency band is 1GHz or less.
The invention relates to a slow wave structure for improving the low-frequency performance of an MIMO antenna, which comprises discrete metal strips arranged on the upper surface and the lower surface of a PCB mainboard far away from one side of the antenna, wherein each discrete metal strip comprises a plurality of metal strips, a gap is arranged between each metal strip, the upper surface metal strip and the lower surface metal strip are distributed in a staggered mode, and the upper surface metal strip and the adjacent lower surface metal strip sequentially form a signal link through metal through holes. Because the relative path length of the ground current of the antenna can be prolonged through the slow wave structure, the antenna has enough ground size in a low frequency band below 1GHz, the effect on low frequency below 1GHz is very large, but the low frequency performance of the MIMO antenna can be improved because the antenna has no influence on high frequency (above 1 GHz) and several calls.
Drawings
In order to illustrate the embodiments of the invention or the technical solutions in the prior art more clearly, the drawings that are needed in the description of the embodiments or the prior art will be briefly introduced below, it is obvious that the drawings in the description only show some embodiments of the invention and therefore should not be considered as limiting the scope, and for a person skilled in the art, other related drawings can also be obtained from these drawings without inventive effort.
Fig. 1 is a schematic diagram of a slow wave structure for improving the low frequency performance of a MIMO antenna according to the present invention.
FIG. 2 is a schematic structural diagram of a slow-wave structure according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram of simulation results of S parameters of the antenna system before and after the slow wave structure is added.
FIG. 4 is a structural diagram of a slow-wave structure according to a second embodiment of the present invention.
Fig. 5 is a schematic layout diagram of an embodiment of a smart watch with a slow wave structure according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The following claims of the present invention are further detailed in conjunction with the detailed description of the embodiments and the accompanying drawings, and it is to be understood that the described embodiments are only a subset of the embodiments of the present invention, and not all embodiments. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention without any inventive work also belong to the protection scope of the present invention.
It should be understood that in the description of the embodiments of the present invention, all directional terms, such as "upper", "lower", "left", "right", "front", "back", etc., indicate orientations or positional relationships based on the orientations, positional relationships, or the orientations or positional relationships that the products of the present invention usually use, which are only used for the convenience of simplifying the description of the present invention, and do not indicate or imply that the devices, elements, or components that are referred to must have specific orientations and specific orientation configurations, and should not be construed as limiting the present invention. For the purpose of explaining only the relative positional relationship between the respective components, the movement, and the like, as shown in the drawings, when the specific posture is changed, the directional indication may be changed accordingly.
Furthermore, the use of ordinal terms such as "first", "second", etc., in the present application is for distinguishing between similar elements and not intended to imply or imply relative importance or the number of technical features indicated. The features defining "first" and "second" may be explicit or implicit in relation to at least one of the technical features. In the description of the present invention, "a plurality" means at least two, i.e., two or more, unless expressly defined otherwise; the meaning of "at least one" is one or both.
In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," "fixed," "screwed" and the like are to be understood in a broad sense, and for example, the positional relationship between the components may be fixed relatively, or the components may be physically fixed, or may be detachably connected, or may be integrated into a single structure; the connection can be mechanical connection or electrical signal connection; either directly or indirectly through intervening media or components; the two elements can be communicated with each other or can be mutually interacted, and unless the specification explicitly defines otherwise, the corresponding function or effect cannot be realized in other understanding manners, and the specific meaning of the terms in the invention can be understood by a person skilled in the art according to specific conditions.
The controller and the control circuit that may be involved in the present invention are conventional control techniques or units for those skilled in the art, and the control circuit of the controller may be implemented by those skilled in the art by using conventional techniques, such as simple programming. The power supply also adopts the prior art, and the main technical point of the invention lies in the improvement of mechanical devices, so the invention does not need to describe the specific circuit control relation and circuit connection in detail.
As shown in fig. 1-3, the present invention provides an embodiment of a slow wave structure for improving the low frequency performance of a MIMO antenna.
This improve slow wave structure of MIMO antenna low frequency performance, include 1 upper surface of PCB mainboard keeping away from 2 one sides of antenna and be equipped with down rectangular discrete type metal strip (the attached drawing does not mark) with rectangular discrete type metal strip 3 in being equipped with the lower surface, every rectangular discrete type metal strip is including distributing in the multistage strap on same straight line, be equipped with the clearance between every section strap, wherein every section strap 4 of upper surface and every section strap 6 dislocation distribution of lower surface, 5 holes cross to form signal link in proper order with adjacent lower surface strap 6 metal on passing through PCB mainboard 1 for upper surface strap 4.
Specifically, the upper strip discrete metal strip 3 is composed of a plurality of upper metal strips 4 which are positioned on the same straight line, and a gap is arranged between every two upper metal strips 4; the lower strip discrete metal strip is composed of a plurality of lower metal strips 6 located on the same straight line, a gap is formed between each lower metal strip 6, adjacent upper metal strips 4 and lower metal strips 6 are arranged in a staggered mode, the adjacent upper metal strips 4 and lower metal strips 6 are sequentially electrically connected through metal through holes 5 in the PCB main board 1, and an upper metal strip 4 and lower metal strip 6 sequential staggered connection structure is formed.
The relative path length of the antenna ground current can be prolonged through the slow wave structure, so that the antenna has enough ground size in a low frequency band below 1 GHz. As shown in fig. 3, the simulation result of the S parameters of the front and rear antennas with the slow wave structure is shown in the schematic diagram, which has a very large effect on low frequencies below 1GHz, but has no influence on high frequencies (above 1 GHz) and several calls, and can improve the low-frequency performance of the MIMO antenna.
The slow wave structure can be designed into a square shape, a round shape or other shapes according to requirements. The number of the slow wave structures can be one, two or more, and the positions of the slow wave structures can be set according to needs. The size of the gap between the upper metal strips 4 and the gap between the lower metal strips 6 can be adjusted as desired. The number of the metal strips is not limited and can be set according to requirements.
As shown in fig. 4, the present invention further provides a slow wave structure for improving the low frequency performance of the MIMO antenna, where the slow wave structure includes a plurality of metal strips respectively disposed on the upper and lower surfaces of each layer of the multilayer PCB motherboard far from the antenna along the thickness direction thereof, and the plurality of metal strips sequentially pass through the metal vias with staggered positions to form a signal link.
Specifically, an upper metal strip 4 and a lower metal strip 6 are respectively arranged on the upper surface and the lower surface of each layer of the multilayer PCB mainboard along the thickness direction of the multilayer PCB mainboard, wherein the upper metal strip 4 of the middle layer is shared with the upper metal strip 6 of the upper layer, the lower metal strip of the middle layer is shared with the lower metal strip of the lower layer, the upper metal strip and the lower metal strip which are adjacent to each other are connected through metal via holes 5, and the positions of the metal via holes of the adjacent layers are staggered to form a. Other structures and arrangements are the same as described above and will not be described again.
Because the relative path length of the ground current of the antenna can be prolonged through the slow wave structure, the antenna has enough ground size in a low frequency band below 1GHz, the effect on low frequency below 1GHz is very large, but the low frequency performance of the MIMO antenna can be improved because the antenna has no influence on high frequency (above 1 GHz) and several calls.
The invention also provides a miniaturized intelligent terminal which comprises an MIMO antenna and at least one slow wave structure, wherein the slow wave structure comprises an upper long strip discrete metal strip and a lower long strip discrete metal strip which are arranged on the upper surface and the lower surface of a PCB mainboard, which are far away from one side of the antenna, each long strip discrete metal strip comprises a plurality of metal strips distributed on the same straight line, a gap is arranged between each metal strip, each upper surface metal strip and each lower surface metal strip are distributed in a staggered mode, and the upper surface metal strips and the adjacent lower surface metal strips sequentially form a signal link through metal through holes; or including MIMO antenna and an at least slow wave structure, this slow wave structure includes and is equipped with the strap respectively along every layer upper and lower surface of its thickness direction on keeping away from antenna one side's multilayer PCB mainboard, and every strap passes through the metal via hole head and the tail and forms signal link in proper order.
Because the relative path length of the ground current of the antenna can be prolonged through the slow wave structure, the antenna has enough ground size in a low frequency band below 1GHz, the effect on low frequency below 1GHz is very large, but the low frequency performance of the MIMO antenna can be improved because the antenna has no influence on high frequency (above 1 GHz) and several calls.
As shown in fig. 5, the smart watch solution is further explained by way of example.
The intelligent watch is designed in a circular shape 9, the antenna 7 is placed at the top end of the intelligent watch, and the arc-shaped slow wave structure 8 is arranged right below the intelligent watch. This arc slow wave structure 8 is including setting up in the discrete metal strip of arc of intelligence wrist-watch PCB board upper and lower surface, and every discrete metal strip of arc includes a plurality of strap, is equipped with the clearance between every strap, its same effectual promotion antenna low-frequency performance.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is to be understood that modifications may be made to the above-described arrangements in the embodiments or equivalents may be substituted for some of the features of the embodiments without departing from the spirit or scope of the present invention.

Claims (9)

1. The utility model provides an improve slow wave structure of MIMO antenna low frequency performance which characterized in that includes and is equipped with the discrete metal strip on keeping away from the PCB mainboard upper and lower surface of antenna one side, and every discrete metal strip includes the multistage strap, is equipped with the clearance between every section strap, and wherein upper surface strap and lower surface strap dislocation distribution, upper surface strap and adjacent lower surface strap pass through the metal via hole and form signal link in proper order.
2. The slow wave structure for improving the low frequency performance of the MIMO antenna according to claim 1, wherein the low frequency band is 1GHz or less.
3. The slow wave structure for improving the low frequency performance of the MIMO antenna of claim 1 or claim 2, wherein the discrete metal strips comprise a long strip shape and a circular arc shape.
4. The utility model provides an improve slow wave structure of MIMO antenna low frequency performance which characterized in that includes and is equipped with the strap respectively along every layer upper and lower surface of its thickness direction on keeping away from antenna one side multilayer PCB mainboard, and every strap passes through the metal via hole head and the tail and forms signal link in proper order.
5. The slow wave structure for improving the low frequency performance of the MIMO antenna according to claim 4, wherein the low frequency band is 1GHz or less.
6. The utility model provides a miniaturized intelligent terminal, includes MIMO antenna and an at least slow wave structure, and this slow wave structure includes that the lower surface is equipped with the discrete metal strip on keeping away from the PCB mainboard of antenna one side, and every discrete metal strip includes and is equipped with the clearance between every section strap, and wherein upper surface strap and lower surface strap dislocation distribution, upper surface strap and adjacent lower surface strap pass through the metal via hole and form signal link in proper order.
7. The small form factor intelligent terminal of claim 6, wherein the low frequency band is 1GHz or less.
8. The utility model provides a miniaturized intelligent terminal, includes MIMO antenna and an at least slow wave structure, and this slow wave structure includes and is equipped with the strap respectively along every layer upper and lower surface of its thickness direction on keeping away from the multilayer PCB mainboard of antenna one side, and every strap head and the tail forms signal link in proper order through the metal via hole.
9. The small form factor intelligent terminal of claim 8, wherein the low frequency band is 1GHz or less.
CN202011611458.2A 2020-12-30 2020-12-30 Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal Pending CN112768930A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011611458.2A CN112768930A (en) 2020-12-30 2020-12-30 Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011611458.2A CN112768930A (en) 2020-12-30 2020-12-30 Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal

Publications (1)

Publication Number Publication Date
CN112768930A true CN112768930A (en) 2021-05-07

Family

ID=75695924

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011611458.2A Pending CN112768930A (en) 2020-12-30 2020-12-30 Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal

Country Status (1)

Country Link
CN (1) CN112768930A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030080904A1 (en) * 2001-10-29 2003-05-01 Gemtek Technology Co., Ltd. Compact printed antenna
US20040160368A1 (en) * 2003-02-18 2004-08-19 Gemtek Technology Co., Ltd. Dual-band antenna
CN1667825A (en) * 2004-03-09 2005-09-14 台湾积体电路制造股份有限公司 Plain conductor structure and process thereof
CN104505584A (en) * 2014-12-10 2015-04-08 嘉兴佳利电子有限公司 Novel LTCC (Low Temperature Co-Fired Ceramic) antenna
CN108648978A (en) * 2018-05-25 2018-10-12 东南大学 A kind of micro-strip meander-line slow wave structure based on period metal cylinder
CN209675478U (en) * 2018-12-19 2019-11-22 纮华电子科技（上海）有限公司 A kind of radio-frequency module and system-in-package
CN209929477U (en) * 2019-03-28 2020-01-10 深圳市晶利德实业有限公司 Wireless surveillance camera mainboard antenna structure
CN111082194A (en) * 2019-10-30 2020-04-28 西安电子科技大学 Substrate integrated slot gap waveguide transmission line with slow wave effect

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030080904A1 (en) * 2001-10-29 2003-05-01 Gemtek Technology Co., Ltd. Compact printed antenna
US20040160368A1 (en) * 2003-02-18 2004-08-19 Gemtek Technology Co., Ltd. Dual-band antenna
CN1667825A (en) * 2004-03-09 2005-09-14 台湾积体电路制造股份有限公司 Plain conductor structure and process thereof
CN104505584A (en) * 2014-12-10 2015-04-08 嘉兴佳利电子有限公司 Novel LTCC (Low Temperature Co-Fired Ceramic) antenna
CN108648978A (en) * 2018-05-25 2018-10-12 东南大学 A kind of micro-strip meander-line slow wave structure based on period metal cylinder
CN209675478U (en) * 2018-12-19 2019-11-22 纮华电子科技（上海）有限公司 A kind of radio-frequency module and system-in-package
CN209929477U (en) * 2019-03-28 2020-01-10 深圳市晶利德实业有限公司 Wireless surveillance camera mainboard antenna structure
CN111082194A (en) * 2019-10-30 2020-04-28 西安电子科技大学 Substrate integrated slot gap waveguide transmission line with slow wave effect

Similar Documents

Publication Publication Date Title
US20120280876A1 (en) Wireless equipment
EP3200275B1 (en) Antenna assembly and electronic device
CN109659686B (en) High-isolation MIMO antenna
CN106450752B (en) MIMO antenna for realizing high isolation of smart phone
US9954275B2 (en) Multiple-input multiple-output antenna, system and mobile terminal
Ding et al. A four-element antenna system for mobile phones
US11095029B2 (en) Antenna device
US10992030B2 (en) Ultra-wideband MIMO antenna and terminal
CN206595397U (en) A kind of multi-input/output antenna
CN109037933B (en) Dual-frequency three-polarization MIMO antenna and wireless communication equipment
CN108400427A (en) Antenna system
CN203166075U (en) Small high isolation dual notch UWB MIMO antenna
CN112332080A (en) Intelligent watch antenna
CN109728406B (en) Antenna system and electronic device
CN102544729A (en) MIMO antenna utilizing closed current circuit in antenna unit to improve isolation degree
CN112768920A (en) Millimeter wave antenna system based on asymmetric coplanar decoupling structure
CN108511892B (en) Compact multi-band antenna
WO2018119946A1 (en) Multi-input multi-output antenna system and mobile terminal
Di Wu et al. A planar MIMO antenna for mobile phones
CN209913028U (en) Miniaturized MIMO antenna system
CN112768936B (en) Discrete 5G antenna isolation system
CN112768930A (en) Slow wave structure for improving low-frequency performance of MIMO antenna and miniaturized intelligent terminal
WO2022012384A1 (en) Electronic device
CN112332096A (en) 5G terminal antenna
CN209133688U (en) Antenna and wireless device

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination