CN201741809U - Chip antenna based on LTCC ceramics medium - Google Patents
Chip antenna based on LTCC ceramics medium Download PDFInfo
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- CN201741809U CN201741809U CN2010205074865U CN201020507486U CN201741809U CN 201741809 U CN201741809 U CN 201741809U CN 2010205074865 U CN2010205074865 U CN 2010205074865U CN 201020507486 U CN201020507486 U CN 201020507486U CN 201741809 U CN201741809 U CN 201741809U
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- ltcc ceramic
- dielectric layer
- feeder line
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Abstract
Provided is a chip antenna based on LTCC ceramics, which belongs to the technical field of antenna, and comprises three metallic pattern layers and two LTCC ceramics medium layers. The utility model is a metal earth plate is disposed at the lower surface of a first LTCC ceramics medium layer; a metal micro-strip feed line is disposed between the first LTCC ceramics medium layer and a second LTCC ceramics medium layer; a metal radiating paster is disposed at the upper surface of the second LTCC ceramics medium layer; two L-shaped grooves are disposed between metal radiating pasters; the end of the metal micro-strip feed line is inserted below the two L-shaped grooves and is connected to a dual-Pi-shaped feeding structure; two short-circuit pins are disposed at the vertical section end of the two L-shaped grooves and is connected to the metal earth plate and the metal radiating paster through the first and the second LTCC ceramics medium layer. The utility model has advantages of possessing wide work bandwidth, super-low section, very small appearance and good stability; better integrating with active circuit with given functions.
Description
Technical field
The utility model belongs to antenna technical field, relates to a kind of antenna component based on the LTCC ceramic dielectric.
Background technology
Current, the fast development of wireless communication system is more and more higher to the requirement of antenna.Traditional whip antenna, helical antenna are progressively replaced by built-in small size antenna.It is little that the dielectric chip antenna not only has size, in light weight, omni-directional preferably, and advantage such as electrical characteristic is stable, and possess low cost, therefore the advantage economically of production in enormous quantities meets radio communication product to the trend light, thin, that short and small direction develops.Simultaneously, LTCC multilayer encapsulation technology provides strong for the development of dielectric chip antenna
Big power.
The important trend of another of Antenna Design is antenna integrated radio-frequency (RF) front-end circuit.In recent years, the monolithic radio frequency transceiver that is applied to WLAN (wireless local area network) based on CMOS technology has occurred.The monolithic radio frequency transceiver has size mini system reliability advantages of higher, has therefore represented the development trend of wireless communication radio frequency system.As one of them vitals, antenna has directly influenced the overall performance of radio-frequency (RF) transceiver.Regrettably, at present for various reasons, antenna still can't be integrated in the chip of radio-frequency (RF) transceiver.
In order to provide suitable antenna, researcher to design various antenna component solutions to radio frequency chip,, designed a kind of antenna component that relates to bluetooth and WLAN frequency band as patent of invention " a kind of different surface bending dual frequency LTCC antenna ".But in order to shield the influence of active circuit to antenna performance, antenna generally need be installed on the metal floor, and in the foregoing invention patent not the antenna with complete floor on the scope of application, certainly will have certain restriction.On the other hand, metallic plate also can have a strong impact on antenna performance conversely, as reducing bandwidth of operation.Therefore, the antenna component design on band floor is important work and stern challenge.
Summary of the invention
The purpose of this utility model is to overcome the shortcoming and defect of above-mentioned prior art, based on the LTCC technology, the LTCC ceramic dielectric antenna component of a kind of WLAN of being used for 5.8GHz is provided, and this antenna has ultralow section and minimum profile, and has the bandwidth of operation and the stability of broad.
The purpose of this utility model is achieved through the following technical solutions:
A kind of antenna component based on the LTCC ceramic dielectric as shown in Figure 1 to Figure 3, comprises metal ground plate 1, metal micro-strip feeder line 3, metal radiation patch 4, a LTCC ceramic dielectric layer 2, the 2nd LTCC ceramic dielectric layer 6 and two shorting pins 5.Metal ground plate 1 is positioned at a LTCC ceramic dielectric layer 2 whole lower surfaces, and metal micro-strip feeder line 3 is between the first LTCC ceramic dielectric layer 2 and the 2nd LTCC ceramic dielectric layer 6, and metal radiation patch 4 is positioned at the 2nd LTCC ceramic dielectric layer 6 upper surfaces.Metal radiation patch 4 be shaped as rectangle, middlely have two " L " shape grooves symmetrically about metal radiation patch 4 horizontal center lines, the horizontal segment of two " L " shape grooves is parallel to each other, and vertical section points to the direction away from metal radiation patch 4 horizontal center lines.The head end of metal micro-strip feeder line 3 is positioned at centre position, a LTCC ceramic dielectric layer 2 narrow limit, its end stretch into metal radiation patch 4 two " L " shape grooves under; Its end links to each other with two " π " type feed structures.Described two " π " type feed structure is made up of four little band minor matters that are parallel to metal micro-strip feeder line 3, described four little band minor matters that are parallel to metal micro-strip feeder line 3 link to each other with one section public vertical microstrip line, wherein two long little band minor matters that are parallel to metal micro-strip feeder line 3 are formed big " π " structure of pointing to metal micro-strip feeder line 3 head ends with public vertical microstrip line, and two other is parallel to short little band minor matters of metal micro-strip feeder line 3 and forms a sensing little " π " structure away from metal micro-strip feeder line 3 head ends with public vertical microstrip line.Described two shorting pins 5 are positioned at the vertical section end that metal is penetrated two " L " shape grooves of paster 4, and pass a LTCC ceramic dielectric layer 2 and the 2nd LTCC ceramic dielectric layer 6, and metal ground plate 1 and metal radiation patch 4 are connected together.
The utility model is compared to prior art owing to adopt two microstrip-fed structures of " π " type, broadening the antenna bandwidth of operation; And the adding shorting pin has been broken through the size of traditional PCB antenna, has ultralow section and minimum profile; The metallic conductor of antenna is imprinted on each layer LTCC ceramic dielectric layer according to design, has reached the purpose of conceal antenna layout, improved the stability of dielectric chip antenna simultaneously.In addition, adopt the LTCC packaging technology, make it to carry out the system in package design with the specific function active circuit better, form modularization, become possibility thereby make it be used for portable set.
Description of drawings
Fig. 1 is the cross-sectional view based on the antenna component of LTCC ceramic dielectric that the utility model provides.
Fig. 2 be the utility model provide based on metal micro-strip feeder line 3 structural representations in the antenna component of LTCC ceramic dielectric.
Fig. 3 be the utility model provide based on metal radiation patch 4 structural representations in the antenna component of LTCC ceramic dielectric.
Fig. 4 is the reflection coefficient simulation curve figure based on the antenna component of LTCC ceramic dielectric that the utility model provides.
Fig. 5 be the utility model provide based on the antenna component of LTCC ceramic dielectric at the H of 5.73GHz face directional diagram.
Fig. 6 be the utility model provide based on the antenna component of LTCC ceramic dielectric at the E of 5.73GHz face directional diagram.
Embodiment
Below in conjunction with accompanying drawing the utility model is described in further detail.
As shown in Figure 1 to Figure 3, a kind of antenna component based on the LTCC ceramic dielectric of providing of the utility model comprises metal ground plate 1, metal micro-strip feeder line 3, metal radiation patch 4, a LTCC ceramic dielectric layer 2, the 2nd LTCC ceramic dielectric layer 6 and two shorting pins 5.Metal ground plate 1 is positioned at a LTCC ceramic dielectric layer 2 whole lower surfaces, and metal micro-strip feeder line 3 is between the first LTCC ceramic dielectric layer 2 and the 2nd LTCC ceramic dielectric layer 6, and metal radiation patch 4 is positioned at the 2nd LTCC ceramic dielectric layer 6 upper surfaces.Metal radiation patch 4 be shaped as rectangle, middlely have two " L " shape grooves symmetrically about metal radiation patch 4 horizontal center lines, the horizontal segment of two " L " shape grooves is parallel to each other, and vertical section points to the direction away from metal radiation patch 4 horizontal center lines.The head end of metal micro-strip feeder line 3 is positioned at centre position, a LTCC ceramic dielectric layer 2 narrow limit, its end stretch into metal radiation patch 4 two " L " shape grooves under; Its end links to each other with two " π " type feed structures.Described two " π " type feed structure is made up of four little band minor matters that are parallel to metal micro-strip feeder line 3, described four little band minor matters that are parallel to metal micro-strip feeder line 3 link to each other with one section public vertical microstrip line, wherein two long little band minor matters that are parallel to metal micro-strip feeder line 3 are formed big " π " structure of pointing to metal micro-strip feeder line 3 head ends with public vertical microstrip line, and two other is parallel to short little band minor matters of metal micro-strip feeder line 3 and forms a sensing little " π " structure away from metal micro-strip feeder line 3 head ends with public vertical microstrip line.Described two shorting pins 5 are positioned at the vertical section end that metal is penetrated two " L " shape grooves of paster 4, and pass a LTCC ceramic dielectric layer 2 and the 2nd LTCC ceramic dielectric layer 6, and metal ground plate 1 and metal radiation patch 4 are connected together.
By present mature LTCC circuit fabrication technology, make this antenna.Wherein: metal ground plate 1 long 14.9mm, wide 8mm; The one LTCC ceramic dielectric layer 2 long 14.9mm, wide 8mm, thick 0.8mm; The 2nd LTCC ceramic dielectric layer 6 long 7.8mm, wide 8mm, thick 1mm; Two-layer LTCC ceramic dielectric layer relative dielectric constant is 5.9, and loss tangent is 0.002; 3 characteristic impedances of metal micro-strip feeder line are 50 ohm, long 10.1mm, wide 1.1mm; In microstrip feed line 3 terminal two " π " type feed structures that link to each other, article four, the characteristic impedance that is parallel to little band minor matters of metal micro-strip feeder line 3 is 50 ohm, public vertical microstrip line characteristic impedance is 100 ohm, article two, than the long 1.8mm of long little band minor matters, wide 1.1mm, article two, the short long 0.9mm of little band minor matters, wide 1.1mm, the long 5.0mm of public vertical microstrip line, wide 0.2mm; Metal radiation patch 4 long 7.8mm, wide 8.0mm; The horizontal segment length 3.8mm of " L " shape groove, wide 0.4mm, vertical segment length 1.3mm, wide 0.4mm; Two shorting pin radiuses are 0.3mm.
After determining above-mentioned size and other parameter values, adopt the 3 D electromagnetic HFSS of simulation software that this antenna is carried out emulation, the reflection coefficient S11 that obtains as shown in Figure 4, as seen in the 5.4GHz-6.06GHz scope, this aerial voltage standing-wave ratio VSWR＜3, be S11＜-6dB, bandwidth reaches 660MHz, relative bandwidth is 11.5%.The total height of antenna is 1.86mm, has realized ultralow section, is more conducive to realize system in package with semiconductor chip.Fig. 5 and Fig. 6 be respectively this antenna at the H of resonance point 5.73GHz face and E face directional diagram, this antenna is omni-directional antenna and can obtains fabulous linear polarization in whole operating frequency range as seen from the figure.The gain of antenna is 2.0dBi..
In the such scheme, the size of described antenna each several part also can be selected other length for use, and such as amplifying in proportion or dwindling, this is conspicuous to persons skilled in the relevant art; The relative dielectric constant of LTCC ceramic dielectric also can be selected in 2～10 scope.
Claims (3)
1. the antenna component based on the LTCC ceramic dielectric comprises metal ground plate (1), metal micro-strip feeder line (3), metal radiation patch (4), a LTCC ceramic dielectric layer (2), the 2nd LTCC ceramic dielectric layer (6) and two shorting pins (5); Metal ground plate (1) is positioned at the whole lower surface of a LTCC ceramic dielectric layer (2), metal micro-strip feeder line (3) is positioned between a LTCC ceramic dielectric layer (2) and the 2nd LTCC ceramic dielectric layer (6), and metal radiation patch (4) is positioned at the 2nd LTCC ceramic dielectric layer (6) upper surface; Metal radiation patch (4) be shaped as rectangle, the centre has two " L " shape grooves symmetrically about metal radiation patch (4) horizontal center line, the horizontal segment of two " L " shape grooves is parallel to each other, and vertical section points to the direction away from metal radiation patch (4) horizontal center line; The head end of metal micro-strip feeder line (3) is positioned at centre position, a narrow limit of LTCC ceramic dielectric layer (2), its end stretch into metal radiation patch (4) two " L " shape grooves under; Its end links to each other with two " π " type feed structures; Described two " π " type feed structure is made up of four little band minor matters that are parallel to metal micro-strip feeder line (3), described four little band minor matters that are parallel to metal micro-strip feeder line (3) link to each other with one section public vertical microstrip line, wherein two long little band minor matters that are parallel to metal micro-strip feeder line (3) are formed big " π " structure of pointing to metal micro-strip feeder line (3) head end with public vertical microstrip line, and two other is parallel to short little band minor matters of metal micro-strip feeder line (3) and forms a sensing little " π " structure away from metal micro-strip feeder line (3) head end with public vertical microstrip line; Described two shorting pins (5) are positioned at the vertical section end that metal is penetrated two " L " shape grooves of paster (4), and pass a LTCC ceramic dielectric layer (2) and the 2nd LTCC ceramic dielectric layer (6), metal ground plate (1) and metal radiation patch (4) are connected together.
2. the antenna component based on the LTCC ceramic dielectric according to claim 1 is characterized in that, described metal micro-strip feeder line (3) is that characteristic impedance is 50 ohm a microstrip line; In described two " π " type feed structure, four characteristic impedances that are parallel to little band minor matters of metal micro-strip feeder line (3) are 50 ohm, and public vertical microstrip line characteristic impedance is 100 ohm.
3. the antenna component based on the LTCC ceramic dielectric according to claim 1 is characterized in that, metal ground plate 1 long 14.9mm, wide 8mm; The one LTCC ceramic dielectric layer 2 long 14.9mm, wide 8mm, thick 0.8mm; The 2nd LTCC ceramic dielectric layer 6 long 7.8mm, wide 8mm, thick 1mm; Two-layer LTCC ceramic dielectric layer relative dielectric constant is 5.9, and loss tangent is 0.002; 3 characteristic impedances of metal micro-strip feeder line are 50 ohm, long 10.1mm, wide 1.1mm; In microstrip feed line 3 terminal two " π " type feed structures that link to each other, article four, the characteristic impedance that is parallel to little band minor matters of metal micro-strip feeder line 3 is 50 ohm, public vertical microstrip line characteristic impedance is 100 ohm, article two, than the long 1.8mm of long little band minor matters, wide 1.1mm, article two, the short long 0.9mm of little band minor matters, wide 1.1mm, the long 5.0mm of public vertical microstrip line, wide 0.2mm; Metal radiation patch 4 long 7.8mm, wide 8.0mm; The horizontal segment length 3.8mm of " L " shape groove, wide 0.4mm, vertical segment length 1.3mm, wide 0.4mm; Two shorting pin radiuses are 0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205074865U CN201741809U (en) | 2010-08-27 | 2010-08-27 | Chip antenna based on LTCC ceramics medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205074865U CN201741809U (en) | 2010-08-27 | 2010-08-27 | Chip antenna based on LTCC ceramics medium |
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| Publication Number | Publication Date |
|---|---|
| CN201741809U true CN201741809U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205074865U Expired - Lifetime CN201741809U (en) | 2010-08-27 | 2010-08-27 | Chip antenna based on LTCC ceramics medium |
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| Country | Link |
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| CN (1) | CN201741809U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950857A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Chip antenna based on LTCC ceramic medium |
| CN102683804A (en) * | 2011-03-14 | 2012-09-19 | 深圳光启高等理工研究院 | Metamaterial radio-frequency antenna |
-
2010
- 2010-08-27 CN CN2010205074865U patent/CN201741809U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950857A (en) * | 2010-08-27 | 2011-01-19 | 电子科技大学 | Chip antenna based on LTCC ceramic medium |
| CN101950857B (en) * | 2010-08-27 | 2012-12-05 | 电子科技大学 | Chip antenna based on LTCC ceramic medium |
| CN102683804A (en) * | 2011-03-14 | 2012-09-19 | 深圳光启高等理工研究院 | Metamaterial radio-frequency antenna |
| CN102683804B (en) * | 2011-03-14 | 2016-05-04 | 深圳光启高等理工研究院 | A kind of super material radio-frequency antenna |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110209 Effective date of abandoning: 20130306 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20110209 Effective date of abandoning: 20130306 |
|
| RGAV | Abandon patent right to avoid regrant |