CN104505592B - A kind of MIMO mobile terminal antennas with broadband character - Google Patents
A kind of MIMO mobile terminal antennas with broadband character Download PDFInfo
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- CN104505592B CN104505592B CN201510018772.2A CN201510018772A CN104505592B CN 104505592 B CN104505592 B CN 104505592B CN 201510018772 A CN201510018772 A CN 201510018772A CN 104505592 B CN104505592 B CN 104505592B
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- microstrip line
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Abstract
The invention discloses a kind of MIMO mobile terminal antennas with broadband character, it is characterised in that：Including medium substrate, also include etching in the positive monopole radiant body a1 of medium substrate, b1 and microstrip line a2, b2, and etching is in the rectangular channel a3 at the medium substrate back side, b3 and Stepped Impedance minor matters a4, b4, the monopole radiant body a1, b1 passes through microstrip line a2 respectively, b2 is fed, rectangular channel a3, b3 respectively with Stepped Impedance minor matters a4, b4 is connected, described monopole radiant body a1, microstrip line a2, rectangular channel a3, Stepped Impedance minor matters a4 composition antenna elements A, monopole radiant body b1, microstrip line b2, rectangular channel b3, Stepped Impedance minor matters b4 composition antenna elements B.The mobile terminal antenna of the present invention, with simple in construction, the advantage of bandwidth of operation ultra-wide, disclosure satisfy that miniaturization, low cost, it is easy to integrated requirement in the terminal.
Description
Technical field
The present invention relates to mobile terminal antenna, more particularly to a kind of MIMO mobile terminal antennas with broadband character.
Background technology
With the fast development of wireless communication technology, movement of the communication system to high-speed, Large Copacity and high reliability is led to
Believe that quality requirement is more and more stronger, and apply traditional communication technology to be difficult to meet this demand.In actual application, multipath
Fading effect is a challenge for being difficult to overcome, because never the signal with transmission path has different phase and width
Degree, this causes them often to be cancelled out each other decrease in receiver end.MIMO technique (multiple-input-
Multiple-output, MIMO) technology launches using multiple dual-mode antennas in a communications system and receives signal, and can
Effectively to overcome multipath fading effect and improve power system capacity and reliability.In recent years, MIMO technology has obtained extensive pass
Note and research, numerous scholars propose many mimo antennas applied to different communication systems.
Due to many merits of MIMO technology, it is broadly considered LTE (Long Term Evolution) and 4G
One of the core technology of (forth generation GSM).Among the popularization at full speed of current 4G communication systems, but could not
Recognize, 2G and 3G communication systems are still using central.Therefore, can be comprehensive in the design of MIMO mobile terminal antennas
Covering the mobile terminal antenna of 2G, 3G and 4G communication system has bigger practicality and attraction.The MIMO occurred at present is moved
Dynamic terminal antenna, is less able to realize this target.
The content of the invention
It is an object of the invention to the shortcoming and deficiency for overcoming prior art, there is provided a kind of MIMO with broadband character
Mobile terminal antenna.
The purpose of the present invention is realized by following technical scheme：
A kind of MIMO mobile terminal antennas with broadband character, including medium substrate, in addition to etch in medium base
Positive monopole radiant body a1, the b1 of plate and microstrip line a2, b2, and etching the medium substrate back side rectangular channel a3, b3 and
Stepped Impedance minor matters a4, b4, described monopole radiant body a1, b1 are fed by microstrip line a2, b2 respectively, a3, b3 points of rectangular channel
It is not connected with Stepped Impedance minor matters a4, b4, described monopole radiant body a1, microstrip line a2, rectangular channel a3, Stepped Impedance minor matters
A4 constitutes antenna element A, monopole radiant body b1, microstrip line b2, rectangular channel b3, Stepped Impedance minor matters b4 composition antenna elements B.
Described Stepped Impedance minor matters a4, b4 are bent into three sections, and three sections of length and width is differed, and form step
The shape of electric impedance resonator.Step impedance resonator can produce more resonant frequency points, so as to realize that ultra wide band is covered
There is provided possibility.
The described medium substrate back side etches a gap, and one neutralization line of introducing above gap along its length
Antenna element A, B are connected.Due to there are multiple antenna elements in mimo antenna design, the coupling between each antenna element
Close height and have on the performance of mimo system and couple smaller between vital influence, antenna element, mimo system performance is higher.
The present invention has two antenna elements A and B, in order that the coupling between two antenna elements is reduced to minimum value, in two days
A gap has been etched on ground between line unit, and one is introduced above gap and has neutralized line by two antenna elements
Connect.Due to two antenna elements flowed in the coupling of high band mainly due to the electric current on ground from a port it is another
Individual port is caused, therefore the gap on ground can effectively separate high-band currents, realizes the lower coupling of high band.In low frequency
Section, the coupling of two antenna elements is not only the also influence of the electromagnetic wave of near-field thermal radiation because the electric current on ground causes, because
This neutralizes line two antenna elements of connection with one can additionally create a coupling path, offset the unborn coupling of low-frequency range
Close, so as to realize the lower coupling of low-frequency range.Pass through ground gap and the collective effect of neutralization line so that two antenna elements are whole
All there is the relatively low degree of coupling in individual frequency range.
Described microstrip line a2, b2 bending is at a right angle.
Described rectangular channel a3, b3 is arranged on the medium substrate back side corresponding with microstrip line a2, b2.
The present invention compared with prior art, has the following advantages that and beneficial effect：
1st, the present invention is compared with the MIMO mobile terminal antennas of the use planar structure occurred, and the present invention has ultra-wide
Bandwidth of operation, can compatibility 2G/3G/4G communication systems, the applicability to communication system is stronger.Pass through front monopole radiant body
To the couple feed of ground step impedance resonator minor matters, generate the working band of a ultra-wide, from 0.87GHz to
2.82GHz.2G communications band GSM900/GSM1800/GSM1900,3G communications bands TD- can be completely covered in the present invention
4G (LTE) communications band of SCDMA/WCDMA/CDMA2000 and developer.
2nd, compared with the antenna of the covering 2G/3G/4G communication systems occurred, the present invention uses planar structure, knot
Structure is compacter, is more suitably applied in mobile terminal, and is accomplished that single ultrabroad band, is not multiple narrow communication frequencies
Band.
3rd, the design is simple in construction, and small volume, cost is low.
Brief description of the drawings
Fig. 1 is the positive structure schematic of the MIMO mobile terminal antennas of the present invention with broadband character；
Fig. 2 is the structure schematic diagram of the MIMO mobile terminal antennas of the present invention with broadband character；
Fig. 3 is the Electromagnetic Simulation curve map of the MIMO mobile terminal antennas of the present invention with broadband character.
Embodiment
With reference to embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited
In this.
Such as Fig. 1,2, a kind of MIMO mobile terminal antennas with broadband character, including medium substrate, in addition to etching
In positive monopole radiant body a1, the b1 of medium substrate and microstrip line a2, b2, and etching is in the rectangular channel at the medium substrate back side
A3, b3 and Stepped Impedance minor matters a4, b4, described monopole radiant body a1, b1 are fed by microstrip line a2, b2 respectively, rectangular channel
A3, b3 are connected with Stepped Impedance minor matters a4, b4 respectively, described monopole radiant body a1, microstrip line a2, rectangular channel a3, step
Impedance minor matters a4 constitutes antenna element A, monopole radiant body b1, microstrip line b2, rectangular channel b3, Stepped Impedance minor matters b4 compositions day
Line unit B；
Described Stepped Impedance minor matters a4, b4 are bent into three sections, and three sections of length and width is differed, and form step
The shape of electric impedance resonator；
The described medium substrate back side etches a gap, and one neutralization line of introducing above gap along its length
Antenna element A, B are connected；
Described microstrip line a2, b2 bending is at a right angle；
Described rectangular channel a3, b3 is arranged on the medium substrate back side corresponding with microstrip line a2, b2.
The present invention is printed on the medium substrate two sides that relative dielectric constant is 4.4.Two days are printed respectively in front of the invention
A1 and b1 in line unit A and B monopole, such as Fig. 1；A2 and b2, wherein microstrip line in the microstrip line being connected with them, such as figure
Characteristic impedance is 50 ohm, is convenient to feed matching.Printed antenna ground in the back side of the present invention, extends two steps from ground
A4 and b4 in electric impedance resonator minor matters, such as Fig. 2；The position corresponding with front microstrip line, has cut off two rectangles on the ground
Part, is convenient to a3 and b3 in impedance matching regulation, such as Fig. 2；Ground between two antenna elements has etched a gap 5；
The top in gap 5 introduces a minor matters line 6.
Using ground connection step impedance resonator minor matters couple feed of the positive monopole paster to the back side, ultra-wide is realized
Band work.By the way that microstrip feed line is deviateed into monopole paster, and two rectangular channels are opened on the ground of microstrip line vis-a-vis, realized
Good impedance matching.Using the minor matters line of two antennas in a gap on ground and connection, realize between antenna element
Lower coupling.Electromagnetic Simulation reflectance factor S11 curves are as shown in Figure 3.It can be seen that -6dB the bandwidth of operation of antenna from
0.87GHz to 2.82GHz, can be completely covered 2G communications bands GSM900/GSM1800/GSM1900,3G communications band TD-
4G (LTE) communications band of SCDMA/WCDMA/CDMA2000 and developer.Simultaneously low frequency is realized between two units
15dB high-isolation in the interior 12dB of section, high band, it is ensured that relatively low channel relevancy in MIMO communication system, is reliable
High quality communication provide guarantee.
Above-described embodiment is preferably embodiment, but embodiments of the present invention are not by above-described embodiment of the invention
Limitation, other any Spirit Essences without departing from the present invention and the change made under principle, modification, replacement, combine, simplification,
Equivalent substitute mode is should be, is included within protection scope of the present invention.
Claims (4)
1. a kind of MIMO mobile terminal antennas with broadband character, it is characterised in that：Including medium substrate, in addition to etching
In positive monopole radiant body a1, the b1 of medium substrate and microstrip line a2, b2, and etching is in the rectangular channel at the medium substrate back side
A3, b3 and Stepped Impedance minor matters a4, b4, described monopole radiant body a1, b1 are fed by microstrip line a2, b2 respectively, rectangular channel
A3, b3 are connected with Stepped Impedance minor matters a4, b4 respectively, described monopole radiant body a1, microstrip line a2, rectangular channel a3, step
Impedance minor matters a4 constitutes antenna element A, monopole radiant body b1, microstrip line b2, rectangular channel b3, Stepped Impedance minor matters b4 compositions day
Line unit B；Wherein microstrip line a2, b2 set location has been respectively offset from monopole radiant body a1, b1 center；The rectangular channel
A3, b3 set position corresponding with front microstrip line on the ground；The described medium substrate back side etches one along its length
Bar gap, and one neutralization line of introducing connects antenna element A, B above gap.
2. the MIMO mobile terminal antennas according to claim 1 with broadband character, it is characterised in that：Described rank
Jump impedance minor matters a4, b4 are bent into three sections, and three sections of length and width is differed, and form the shape of step impedance resonator
Shape.
3. the MIMO mobile terminal antennas according to claim 1 with broadband character, it is characterised in that：Described is micro-
Band line a2, b2 bending is at a right angle.
4. the MIMO mobile terminal antennas according to claim 1 with broadband character, it is characterised in that：Described square
Shape groove a3, b3 are arranged on the medium substrate back side corresponding with microstrip line a2, b2.
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| CN201510018772.2A CN104505592B (en) | 2015-01-14 | 2015-01-14 | A kind of MIMO mobile terminal antennas with broadband character |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104882677B (en) * | 2015-05-25 | 2018-01-16 | 华南理工大学 | Difference gap mimo antenna with high cmrr |
| CN106252871B (en) * | 2016-09-20 | 2022-12-09 | 南京信息工程大学 | Compact four-unit ultra-wideband MIMO antenna |
| CN106374212B (en) * | 2016-11-09 | 2023-05-05 | 广东工业大学 | Compact high-isolation MIMO antenna |
| CN109672019B (en) * | 2017-10-17 | 2022-04-19 | 中兴通讯股份有限公司 | Terminal MIMO antenna device and method for realizing antenna signal transmission |
| CN108565544B (en) * | 2018-04-20 | 2023-10-17 | 深圳市信维通信股份有限公司 | Ultra-wideband 5G MIMO antenna structure |
| CN111934089B (en) * | 2019-05-13 | 2021-10-26 | 华为技术有限公司 | Antenna device and mobile terminal |
| CN111082231A (en) * | 2019-10-14 | 2020-04-28 | 佛山科新锘通讯有限公司 | MIMO omnidirectional antenna |
| CN113285221B (en) * | 2021-05-21 | 2024-03-22 | 昆山睿翔讯通通信技术有限公司 | Broadband terminal antenna and mobile terminal |
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