CN101026259B - Zigzag LTCC dual-band chip antenna - Google Patents
Zigzag LTCC dual-band chip antenna Download PDFInfo
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- CN101026259B CN101026259B CN 200710027140 CN200710027140A CN101026259B CN 101026259 B CN101026259 B CN 101026259B CN 200710027140 CN200710027140 CN 200710027140 CN 200710027140 A CN200710027140 A CN 200710027140A CN 101026259 B CN101026259 B CN 101026259B
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Abstract
This invention provides a curved line LTCC double-band chip-plate antenna including a LTCC chip, an impedance converter and a first and a second layer of radiation units, in which, two ends of the LTCC chip are set with front and back electrodes, the two laminated layers of radiation units are curved conductor lines in rectangular waves and inserted in the LTCC chip, the second layer units are under the first units, and the front end of which is connected with the front of the first through metalized hollow hole, the back end of the first ones is connected with the back electrodes and the front end is connected with the impedance converter via the metalized hollow hole, the shape of the impedance converter is a laminated double-L cubic structure, the two layers are connected by multiple metalized hollow holes and the front of the top layer is connected with the front electrode, the front and back electrodes of which, the first and second layers of radiation units and the impedance converter are metal conductors working at double bands so as to increase the work band of antennas.
Description
Technical field
The present invention relates to the antenna technology in WLAN and the personal mobile communication transmission equipment, specifically be meant Zigzag LTCC dual-band chip antenna.
Background technology
The develop rapidly of Modern wireless communication technology is more and more higher to the requirement of antenna.External whip antenna, helical antenna once were the main flows of portable terminal.Nowadays they are progressively replaced by the small size antenna of built-in (built-in).The dielectric chip antenna is little, in light weight because of not only having size, omni-directional preferably, and advantage such as electrical characteristic is stable, and possess low cost, the advantage economically of production in enormous quantities.Its compliance with wireless communication product is to the trend light, thin, that short and small direction develops, and becomes the focus of Recent study.LTCC (LTCC) technology provides powerful power for the development of dielectric chip antenna simultaneously.
The LTCC technology is a kind of multi-layer ceramics technology, it can be embedded into passive component substrate inside and simultaneously active element is mounted on substrate surface, have very big flexibility in design, really realized the three-dimensional structure that traditional polymer and traditional ceramics material can't obtain.The LTCC technology is fit to design and produces built-in type passive device, especially inductance with better high frequency characteristics and electric capacity and the filter be made up of them very much, to replace traditional separate type device.The essence of LTCC technology is the integrated of passive device, comprises inductance, electric capacity, filter and antenna and duplexer etc.
The research and the design of LTCC antenna are started late, and with respect to the LTCC filter, also are in the starting stage based on the antenna of LTCC technology.At present the absolute big number of the research of LTCC antenna component is also just studied single-frequency LTCC antenna component, the research of double frequency LTCC antenna component is still few.
The antenna of ceramic core kind of research can be divided into bulk (Block) antenna of ceramic core and multilayer (Multilayer) antenna of ceramic core according to manufacture craft now.The former be to use high temperature (Celsius 1000 degree more than) with the monolithic ceramic body is once sintered finish after, again the plain conductor of antenna is imprinted on the surface of ceramic block.The latter adopts the LTCC technology, and multi-layer ceramics is repeatedly pressed after the contraposition temperature sintering with 800～900 degree Celsius again.So the metallic conductor of antenna can need be imprinted on each layer ceramic dielectric layer according to design, thus, just can effectively dwindle antenna size, and can reach the purpose of conceal antenna layout, improves the stability of dielectric chip antenna simultaneously.
Existing chip antenna great majority can only single frequency operation as: 1.5～1.6GHz (GPS), 2.45GHz (Bluetooth (TM), 802.11b/g) and 5.25～5.75GHz (UNII, 802.11a).
Summary of the invention
The objective of the invention is to overcome the shortcoming and defect of above-mentioned prior art, Zigzag LTCC dual-band chip antenna is provided, it can strengthen the bandwidth of operation of antenna effectively in two-band work, reduces the size of antenna simultaneously again.
Purpose of the present invention is achieved through the following technical solutions: this Zigzag LTCC dual-band chip antenna, comprise LTCC substrate, ground floor radiating element, second layer radiating element and impedance transformer, described LTCC substrate two ends are respectively equipped with preceding termination electrode, back termination electrode, described two-layer radiating element is respectively the tortuous conductor lines of rectangular waveform, and two-layer radiating element stacked on top of one another is flush-mounted in the described LTCC substrate; Second layer radiating element is positioned at ground floor radiating element bottom, and its front end is connected by metallization emptying aperture and ground floor radiating element are anterior; The rear end of ground floor radiating element is connected with the back termination electrode, and the front end of ground floor radiating element links to each other with impedance transformer by the metallization emptying aperture; Described impedance transformer is shaped as two L stereochemical structures of stacked on top of one another, connects by a plurality of metallization emptying apertures between its levels, and the front end on impedance transformer upper strata is connected with preceding termination electrode; Termination electrode, back termination electrode, ground floor radiating element, second layer radiating element, impedance transformer are metallic conductor before described.
The relative dielectric constant scope of described LTCC substrate is 2～1000.
Described metallic conductor comprises low-loss metallic conductors such as copper, gold.
The present invention compared with prior art has following advantage and beneficial effect: the tortuous line style dual-band chip antenna of having invented a kind of Bluetooth of being applied to 2.45GHz/WLAN 5.2GHz frequency range.The main feature of this antenna structure is in the LTCC structure, embeds two-layer meander line radiating element, can enlarge the beamwidth of antenna, can also play the effect of protection antenna radiation unit, thereby has improved the stability of dual-band chip antenna.Adopt the two L stereochemical structures of stacked on top of one another to form impedance transformer and link to each other, make the input impedance of dual-band chip antenna obtain matched well with two-layer radiating element up and down.
Description of drawings
Fig. 1 is the structural representation of Zigzag LTCC dual-band chip antenna of the present invention.
Fig. 2 is the structural representation of ground floor radiating element shown in Figure 1, second layer radiating element.
Fig. 3 is the structural representation of impedance transformer shown in Figure 1.
Fig. 4 is the equivalent circuit theory figure of Zigzag LTCC dual-band chip antenna of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
As shown in Figure 1, 2, 3, this Zigzag LTCC dual-band chip antenna, comprise LTCC substrate 5, ground floor radiating element 3c, second layer radiating element 4a, impedance transformer (3a, 3b, 4b, 4c), LTCC substrate two ends are respectively equipped with preceding termination electrode 1, back termination electrode 1a, two-layer radiating element 3c, 4a are respectively the tortuous conductor lines of rectangular waveform, and two-layer radiating element 3c, 4a stacked on top of one another are flush-mounted in the LTCC substrate 5; Ground floor radiating element 3c resonance is at 2.45GHz, and second layer radiating element 4a resonance promptly changes the length of radiating element 3c at 5.25GHz, and first resonance frequency of may command antenna changes radiating element 4a length, second resonant frequency point of may command antenna.
Second layer radiating element 4a is positioned at ground floor radiating element 3c bottom, and its front end is connected with ground floor radiating element 3c is anterior by metallization emptying aperture 2e; The rear end of ground floor radiating element 3c is connected with back termination electrode 1a, and the front end of ground floor radiating element 3c is connected with impedance transformer (3a, 3b, 4b, 4c) by metallization emptying aperture 2d; Shown in Fig. 1,3, impedance transformer is shaped as two L stereochemical structures (3a, 3b, 4b, 4c) of stacked on top of one another, connects by three metallization emptying apertures (2a, 2b, 2c) between its levels, and the front end 3a on impedance transformer upper strata is connected with preceding termination electrode 1.This impedance transformer makes the input of antenna obtain good coupling.
The relative dielectric constant scope of LTCC substrate is 2～1000.Preceding termination electrode, back termination electrode, ground floor radiating element, second layer radiating element, impedance transformer are metallic conductor, comprise low-loss metallic conductors such as copper, gold.
The equivalent electric circuit of this Zigzag LTCC dual-band chip antenna as shown in Figure 4, L is the inductance of three-dimensional broken line structure (3a, 3b, 4a, 4c) equivalence, two inductance L 1, L2 respectively with two capacitor C 1, the C2 parallel connection forms two parallel resonators, is respectively the equivalent electric circuit of two radiating elements, R represents the radiation resistance of antenna, and C3 is the parasitic capacitance between antenna component and the ground (Ground).
As mentioned above, just can realize the present invention preferably.
Claims (3)
1. Zigzag LTCC dual-band chip antenna, it is characterized in that: comprise LTCC substrate, ground floor radiating element, second layer radiating element and impedance transformer, described LTCC substrate two ends are respectively equipped with preceding termination electrode, back termination electrode, described two-layer radiating element is respectively the tortuous conductor lines of rectangular waveform, and two-layer radiating element stacked on top of one another is flush-mounted in the described LTCC substrate; Second layer radiating element is positioned at ground floor radiating element bottom, and its front end is connected by metallization emptying aperture and ground floor radiating element are anterior; The rear end of ground floor radiating element is connected with the back termination electrode, the front end of ground floor radiating element links to each other with impedance transformer by the metallization emptying aperture, described impedance transformer is shaped as two L stereochemical structures of stacked on top of one another, connect by a plurality of metallization emptying apertures between its levels, the front end on impedance transformer upper strata is connected with preceding termination electrode; Termination electrode, back termination electrode, ground floor radiating element, second layer radiating element, impedance transformer are metallic conductor before described.
2. according to the described Zigzag LTCC dual-band chip antenna of claim 1, it is characterized in that: the relative dielectric constant scope of described LTCC substrate is 2～1000.
3. according to the described Zigzag LTCC dual-band chip antenna of claim 1, it is characterized in that: described metallic conductor comprises copper, gold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710027140 CN101026259B (en) | 2007-03-13 | 2007-03-13 | Zigzag LTCC dual-band chip antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710027140 CN101026259B (en) | 2007-03-13 | 2007-03-13 | Zigzag LTCC dual-band chip antenna |
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| Publication Number | Publication Date |
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| CN101026259A CN101026259A (en) | 2007-08-29 |
| CN101026259B true CN101026259B (en) | 2010-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200710027140 Expired - Fee Related CN101026259B (en) | 2007-03-13 | 2007-03-13 | Zigzag LTCC dual-band chip antenna |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707284B (en) * | 2009-11-20 | 2013-01-09 | 电子科技大学 | LTCC electrically small integrated antenna for radio-frequency front-end system |
| CN102142601B (en) * | 2010-11-26 | 2014-03-12 | 深圳市麦捷微电子科技股份有限公司 | Miniature radio frequency identification reading antenna |
| CN102623798A (en) * | 2012-04-13 | 2012-08-01 | 电子科技大学 | Multilayer ceramic antenna and preparation method thereof |
| CN102709697A (en) * | 2012-05-08 | 2012-10-03 | 成都成电电子信息技术工程有限公司 | Miniature LTCC (low temperature co-fired ceramic) dual-frequency antenna |
| CN104852135B (en) * | 2014-02-17 | 2018-03-23 | 佳邦科技股份有限公司 | The design method of antenna structure, electronic installation and antenna structure |
| CN113823885B (en) * | 2021-09-13 | 2023-02-03 | 安徽大学 | Filter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017998Y (en) * | 2007-03-13 | 2008-02-06 | 华南理工大学 | Zigzag line type LTCC dual-frequency chip antenna |
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2007
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017998Y (en) * | 2007-03-13 | 2008-02-06 | 华南理工大学 | Zigzag line type LTCC dual-frequency chip antenna |
Non-Patent Citations (1)
| Title |
|---|
| 许佳.小型LTCC天线的研究与分析.中国优秀硕士学位论文全文数据库.2005, * |
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Granted publication date: 20101229 Termination date: 20140313 |