CN103199338B - A kind of LTCC multifrequency antenna of miniaturization - Google Patents
A kind of LTCC multifrequency antenna of miniaturization Download PDFInfo
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- CN103199338B CN103199338B CN201310096023.2A CN201310096023A CN103199338B CN 103199338 B CN103199338 B CN 103199338B CN 201310096023 A CN201310096023 A CN 201310096023A CN 103199338 B CN103199338 B CN 103199338B
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Abstract
The present invention relates to a kind of LTCC multifrequency antenna of miniaturization, comprise LTCC ceramic dielectric body, antenna radiation unit, front end feed element and rear end loading unit, it is characterized in that, described LTCC ceramic dielectric body is as the substrate of antenna, described antenna radiation unit is embedded in LTCC ceramic dielectric body, described front end feed element is positioned at the front end of LTCC ceramic dielectric body and is connected with the front end of antenna radiation unit, and described rear end loading unit is positioned at the rear end of LTCC ceramic dielectric body and is connected with the rear end of antenna radiation unit.Beneficial effect of the present invention: adopt double-deck annular meandering line structure, Antenna Operation not only can be made in multiple frequency range, also achieve the miniaturization of antenna simultaneously.
Description
Technical field
The present invention relates to portable mobile termianl antenna technical field, the LTCC multifrequency antenna of the double-deck meandering line structure of particularly a kind of miniaturization.
Background technology
Along with the high speed development of science and technology, mobile communication has stepped into the 4G epoch, and various novel radio technical standard continues to bring out.The mobile terminal meeting multiple communication protocol also constantly occurs.Therefore be necessary to design multifrequency antenna of good performance.
In recent years, the fast development of Modem radio system, to the portability of wireless device, dexterity propose very strict requirement, many passive circuits be applied in circuit have achieved huge progress in miniaturized, the miniaturization of antenna does not but have important breakthrough always, become parts the heaviest in wireless system to reveal, become one of bottleneck of restriction wireless device miniaturization, therefore the miniaturization of antenna seems particularly important.
LTCC (the LTCC that developed recently rises, LowTemperatureCo-firedCeramic) technology, in conjunction with self sandwich construction and high-k, in antenna miniaturization, serve very important effect, but this again limit gain and the bandwidth of antenna simultaneously, this is also the technological difficulties of current LTCC antenna, and important research direction.Therefore in conjunction with the technical advantage of LTCC, miniaturization is designed, and standing wave, gain antenna all preferably, be one and be necessary very much, be again the task of extremely having challenge simultaneously.
In addition, need the interconnected through hole of interlayer a lot of in some multi-layered chip antenna, cause mismachining tolerance comparatively large, processing cost is very high, is unfavorable for the in enormous quantities of antenna, and this kind of antenna gain is usually lower.Therefore, be necessary that the LTCC multifrequency antenna designing a miniaturization is to solve the problem.
Summary of the invention
The object of the invention is the shortcoming for existing LTCC antenna, propose a kind of LTCC multifrequency antenna of miniaturization, this antenna structure is simple and volume is little, can meet the application of the plurality of communication schemes such as GSM, GPS, DCS, WCDMA, TD-SCDMA, bluetooth, TD-LTE, WLAN.
Technical scheme of the present invention is: a kind of LTCC multifrequency antenna of miniaturization, comprise LTCC ceramic dielectric body, antenna radiation unit, front end feed element and rear end loading unit, it is characterized in that, described LTCC ceramic dielectric body is as the substrate of antenna, described antenna radiation unit is embedded in LTCC ceramic dielectric body, described front end feed element is positioned at the front end of LTCC ceramic dielectric body and is connected with the front end of antenna radiation unit, and described rear end loading unit is positioned at the rear end of LTCC ceramic dielectric body and is connected with the rear end of antenna radiation unit.
Above-mentioned antenna radiation unit comprises the lower annular meander line being arranged in LTCC ceramic dielectric body lower floor, the upper annular meander line being arranged in upper strata and Z-shaped meander line.
Beneficial effect of the present invention: the present invention utilizes LTCC technology, adopts double-deck annular meandering line structure, Antenna Operation not only can be made in multiple frequency range, also achieve the miniaturization of antenna simultaneously.This antenna also has good omni-directional and gain characteristic.This antenna is relative to traditional LTCC antenna, and the through hole between levels less (only having a through hole in this example), is conducive to the success rate improving processing.In addition, the thickness of such antenna decreases comparatively before, can reduce the thickness of wireless terminal further, contribute to the development of ultra-thin series.The SMT encapsulation design that antenna adopts in producing, not only can improve the stability of antenna, and be convenient to test and the debugging of antenna product.
Accompanying drawing explanation
Fig. 1 is the three-dimensional model structure figure of inventive antenna.
Fig. 2 is inventive antenna radiative unit structure figure.
Fig. 3 is the S11 figure of inventive antenna.
Reference numeral: LTCC ceramic dielectric body 10, antenna radiation unit 20, upper annular meander line 201, Z-shaped meander line 202, lower annular meander line 203, cylindrical hole 20A, front end feed element 30, rear end loading unit 40.
Embodiment
For the ease of the understanding of those skilled in the art, below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
As shown in Figure 1, a kind of LTCC multifrequency antenna of miniaturization, comprise LTCC ceramic dielectric body 10, antenna radiation unit 20, front end feed element 30 and rear end loading unit 40, it is characterized in that, described LTCC ceramic dielectric body 10 is as the substrate of antenna, described antenna radiation unit 20 is embedded in LTCC ceramic dielectric body 10, described front end feed element 30 is positioned at the front end of LTCC ceramic dielectric body 10 and is connected with the front end of antenna radiation unit 20, and described rear end loading unit 40 is positioned at the rear end of LTCC ceramic dielectric body 10 and is connected with the rear end of antenna radiation unit 20.
As shown in Figure 2, above-mentioned antenna radiation unit 20 comprises the lower annular meander line 203 being arranged in LTCC ceramic dielectric body 10 lower floor, the upper annular meander line 201 being arranged in upper strata and Z-shaped meander line 202.
Described annular meander line 201 comprises the first subsegment 2011, second subsegment 2012 of annular meander line 201, the 3rd subsegment 2013 and the 4th subsegment 2014, aforementioned four subsegments connect successively and extend in a plane according to rectangular path, and described 4th subsegment 2014 does not close with the first subsegment 2011.
Described Z-shaped meander line 202 comprises the first subsegment 2021, second subsegment 2022, the 3rd subsegment 2023 of Z-shaped meander line 202, aforementioned three subsegments connect successively and extend in a plane according to zigzag trajectory, and described second subsegment 2022 is vertical with the 3rd subsegment 2023 with the first subsegment 2021 respectively.
Described lower annular meander line 203 comprises the first subsegment 2031 of lower annular meander line 203, second subsegment 2032, 3rd subsegment 2033, 4th subsegment 2034, 5th subsegment 2035, 6th subsegment 2036 and the 7th subsegment 2037, aforementioned seven subsegments connect successively and extend in a plane according to helical trajectory, first subsegment 2031 of described lower annular meander line 203, second subsegment 2032, 3rd subsegment 2033 and the 4th subsegment 2,034 four subsegments are connected successively and extend in a plane according to rectangular path, described 4th subsegment 2034 does not close with the first subsegment 2031, described 5th subsegment 2035, 6th subsegment 2036 is connected successively with the 7th subsegment 2037 and extends in a plane according to zigzag trajectory, described 6th subsegment 2036 is vertical with the 5th subsegment 2035 with the 7th subsegment 2037 respectively.
First subsegment 2011 of above-mentioned annular meander line 201 is connected with front end feed element 30, and the 3rd subsegment 2013 of upper annular meander line 201 is connected with rear end loading unit 40.
Second subsegment 2032 of above-mentioned lower annular meander line 203 is connected with rear end loading unit 40, and the first subsegment 2031 of lower annular meander line 203 is parallel and overlapping with the 3rd subsegment 2013 with the second subsegment 2012 of upper annular meander line 201 respectively with the second subsegment 2032.3rd subsegment 2033 and the corner connection of the 4th subsegment 2034 of above-mentioned lower annular meander line 203 have a cylindrical hole 20A and are connected with the initiating terminal of the first subsegment 2021 of Z-shaped meander line 202.
First subsegment 2021 of described Z-shaped meander line 202 is parallel with the 3rd subsegment 2033 of lower annular meander line 203 and partly overlap, and described Z-shaped meander line 202 is positioned at the photograph spiral track view field that lower annular meander line 203 is formed.
Above-mentioned LTCC ceramic dielectric body 10 adopts the dielectric material that dielectric constant high-performance is stable, antenna radiation unit 20, front end feed element 30 and rear end loading unit 40 adopt the metallic conductor that dielectric loss is little, resistivity is low, and its material can be Ag, Au, Cu and associated alloys etc. thereof.Upper annular meander line 201, Z-shaped meander line 202, lower annular meander line 203, cylindrical hole 20A together constitute antenna radiation unit 20.
The bilevel annular meander line 201 of above-mentioned antenna radiation unit 20, Z-shaped meander line 202, lower annular meander line 203 all have approximate cabling form, such mode contributes to the formation of many passbands, also the bandwidth of each passband can be strengthened, and the impact between each minor matters is less, the parameter of each minor matters can be regulated easily to be suitable for and required communications band.
In above-mentioned antenna radiation unit 20, upper annular meander line 201 is connected with rear end loading unit 40 with front end feed element 30 respectively with a part (subsegment) for lower annular meander line 203.So not only can reduce the size of antenna largely, and have employed the SMT(SurfaceMountedTechnology of front end feed element 30 and rear end loading unit 40, surface mounting technology) package design, antenna structure can be made very stable, and can process time be saved, also facilitate test and the debugging of antenna product greatly.
Its operation principle of the antenna of said structure is: as shown in Figure 2, and because upper annular meander line 201 length is comparatively large, suitably its length of adjustment can make its resonance in two or more frequency in multiple proportion, and what this example provided is only applicable to two frequencies.The CURRENT DISTRIBUTION of antenna end can be changed by cylindrical hole 20A, regulate the size of Z-shaped meander line 202 that antenna resonance can be made in required frequency, thus produce new resonance passband, but the bandwidth of the antenna low frequency pass band that can be like this is narrower.Antenna resonance can be made in one very near the passband of low frequency by the size of meander line 201 annular in suitable adjustment, thus produce uneven resonance, to expand low frequency bandwidth, make antenna can meet the requirement of multiband.
Fig. 3 gives the S11 curve of multifrequency structural antenna in its working band of the present embodiment, and as shown in the figure, the return loss of antenna is less than bandwidth covering GSM, TD-SCDMA, TD-LTE of-6dB, can be used for the mobile terminal supporting multiple network pattern.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present invention, should be understood to that protection scope of the present invention is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from essence of the present invention according to these technology enlightenment disclosed by the invention, and these distortion and combination are still in protection scope of the present invention.
Claims (6)
1. a miniaturized LTCC multifrequency antenna, comprise LTCC ceramic dielectric body (10), antenna radiation unit (20), front end feed element (30) and rear end loading unit (40), it is characterized in that, described LTCC ceramic dielectric body (10) is as the substrate of antenna, described antenna radiation unit (20) is embedded in LTCC ceramic dielectric body (10), described front end feed element (30) is positioned at the front end of LTCC ceramic dielectric body (10) and is connected with the front end of antenna radiation unit (20), described rear end loading unit (40) is positioned at the rear end of LTCC ceramic dielectric body (10) and is connected with the rear end of antenna radiation unit (20),
Above-mentioned antenna radiation unit (20) comprises the lower annular meander line (203) being arranged in LTCC ceramic dielectric body (10) lower floor, be arranged in upper annular meander line (201) and the Z-shaped meander line (202) on upper strata, and a cylindrical hole (20A), upper annular meander line (201) is connected with front end feed element (30) and rear end loading unit (40) respectively, lower annular meander line (203) is connected with rear end loading unit (40), lower annular meander line (203) is connected with Z-shaped meander line (202) by cylindrical hole (20A).
2. the LTCC multifrequency antenna of a kind of miniaturization according to claim 1, it is characterized in that, described annular meander line (201) comprises first subsegment (2011) of annular meander line (201), the second subsegment (2012), the 3rd subsegment (2013) and the 4th subsegment (2014), aforementioned four subsegments connect successively and extend in a plane according to rectangular path, and described 4th subsegment (2014) does not close with the first subsegment (2011).
3. the LTCC multifrequency antenna of a kind of miniaturization according to claim 2, it is characterized in that, first subsegment (2011) of above-mentioned annular meander line (201) is connected with front end feed element (30), and the 3rd subsegment (2013) of upper annular meander line (201) is connected with rear end loading unit (40).
4. the LTCC multifrequency antenna of a kind of miniaturization according to claim 1, it is characterized in that, described Z-shaped meander line (202) comprises the first subsegment (2021), the second subsegment (2022), the 3rd subsegment (2023) of Z-shaped meander line (202), aforementioned three subsegments connect successively and extend in a plane according to zigzag trajectory, and described second subsegment (2022) is vertical with the 3rd subsegment (2023) with the first subsegment (2021) respectively.
5. the LTCC multifrequency antenna of a kind of miniaturization according to claim 1, it is characterized in that, described lower annular meander line (203) comprises first subsegment (2031) of lower annular meander line (203), second subsegment (2032), 3rd subsegment (2033), 4th subsegment (2034), 5th subsegment (2035), 6th subsegment (2036) and the 7th subsegment (2037), aforementioned seven subsegments connect successively and extend in a plane according to helical trajectory, first subsegment (2031) of described lower annular meander line (203), second subsegment (2032), 3rd subsegment (2033) and the 4th subsegment (2034) four subsegments are connected successively and extend in a plane according to rectangular path, described 4th subsegment (2034) does not close with the first subsegment (2031), described 5th subsegment (2035), 6th subsegment (2036) is connected successively with the 7th subsegment (2037) and extends in a plane according to zigzag trajectory, described 6th subsegment (2036) is vertical with the 5th subsegment (2035) with the 7th subsegment (2037) respectively, second subsegment (2032) is connected with rear end loading unit (40).
6. the LTCC multifrequency antenna of a kind of miniaturization according to claim 4 or 5, it is characterized in that, first subsegment (2021) of described Z-shaped meander line (202) is parallel with the 3rd subsegment (2033) of lower annular meander line (203) and partly overlap, and described Z-shaped meander line (202) is positioned at the photograph spiral track view field that lower annular meander line (203) is formed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310096023.2A CN103199338B (en) | 2013-03-25 | 2013-03-25 | A kind of LTCC multifrequency antenna of miniaturization |
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| CN201310096023.2A CN103199338B (en) | 2013-03-25 | 2013-03-25 | A kind of LTCC multifrequency antenna of miniaturization |
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| CN103199338B true CN103199338B (en) | 2016-02-10 |
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| CN110167245B (en) * | 2019-05-24 | 2021-07-20 | 南京邮电大学 | Plasma density measurement sensor based on LTCC antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202159770U (en) * | 2011-08-05 | 2012-03-07 | 富港电子（东莞）有限公司 | Multi-frequency antenna structure |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3895737B2 (en) * | 2004-04-09 | 2007-03-22 | 古河電気工業株式会社 | Multi-frequency antenna and small antenna |
| CN201038309Y (en) * | 2007-04-04 | 2008-03-19 | 浙江正原电气股份有限公司 | LTCC stacked ceramic antenna |
| CN201741806U (en) * | 2009-11-20 | 2011-02-09 | 电子科技大学 | Low temperature co-fired ceramic (LTCC) electric small-integrated antenna for radio frequency (RF) front end system |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202159770U (en) * | 2011-08-05 | 2012-03-07 | 富港电子（东莞）有限公司 | Multi-frequency antenna structure |
| 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 |
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