CN101859927B - LTCC lamination double-fed circularly polarized micro-strip paster antenna - Google Patents
LTCC lamination double-fed circularly polarized micro-strip paster antenna Download PDFInfo
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- CN101859927B CN101859927B CN 201019087048 CN201019087048A CN101859927B CN 101859927 B CN101859927 B CN 101859927B CN 201019087048 CN201019087048 CN 201019087048 CN 201019087048 A CN201019087048 A CN 201019087048A CN 101859927 B CN101859927 B CN 101859927B
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Abstract
The invention relates to an LTCC lamination double-fed circularly polarized micro-strip paster antenna, which belongs to the technical field of antennae and particularly relates to a micro-strip paster antenna with a low section. The antenna comprises two layers of radiation metal pasters, a grounding metal layer and a feed layer, wherein the four functional layers are spaced by three layers of medium LTCC ceramic dielectric substrates, and the feed layer consists of a Wilkins-layer power divider and a 90-degree phase shift micro-strip line. The geometric centers of the two layers of radiation metal pasters and the grounding metal layer are connected with each other by metal grounding pins, and the double-fed points with 90-degree phase difference on the feed layer are connected with the upper layer of radiation metal paster via metal feed pins. Two edges of each of the two layers of radiation metal pasters are respectively provided with two rectangular frequency modulation electrodes. The invention not only can better give consideration to the performance requirements of low section, broadband and circular polarization of the micro-strip antenna, but also can appropriately regulate the frequency band of the antenna conveniently.
Description
Technical field
The invention belongs to antenna technical field, be specifically related to a kind of low section micro-strip paster antenna.
Background technology
Micro-strip paster antenna has that volume is little, in light weight, thin profile, the plurality of advantages such as conformal that are prone to, in the application in fields such as satellite fix, radio communication, long-range remote sensing, Aero-Space very extensively.In airborne or bomb-borne application, micro-strip paster antenna is stressed in particular the performance requirement of its low section, broadband and circular polarization.But micro-strip paster antenna input impedance is very responsive with the variation of frequency, causes its impedance bandwidth very narrow.Current micro-strip paster antenna generally all adopts organic media material or ceramic material to make substrate, in order to expand the bandwidth of micro-strip paster antenna, approach commonly used comprise increase substrate thickness, reduce substrate dielectric constant, take sandwich construction, additional impedance coupling etc.But these modes all are to be cost with the thickness that increases antenna or area, are unfavorable for the conformal design of micro-strip paster antenna and carrier and the growth requirement of miniaturization.Micro-strip paster antenna is taken into account the contradiction of low section and broadband development and is failed all the time to be well solved.In addition, aspect the circular polarization that realizes micro-strip paster antenna, all be the mode of taking on radiation patch, to carry out suitable corner cut mainly at present.Though it is more convenient that this mode implements, the circular polarization effect of antenna is not very good, and the antenna axial ratio parameter is higher, and very high to the dimension precision requirement of paster corner cut.
Appearance of LTCC (LTCC) technology in recent years and the micro-strip paster antenna that develops into the exploitation innovation structure provide powerful power.The LTCC technology is as a kind of advanced person's multi-layer ceramics technology; Not only can the structure of conventional microsthp patch antennas be extended to three-dimensional from original one dimension; And adopted curtain coating and through hole technology in the LTCC technology multiple stratification process, except being convenient to processing, also can provide than the better layer thickness control of conventional baseplate material; Obtain embedding tolerance tighter on the element value, thereby be expected to create conditions for the micro-strip paster antenna of low section, widebandization and the low axial ratio of development of new.
Summary of the invention
The objective of the invention is to overcome existing micro-strip paster antenna in the deficiency of taking into account aspect low section, broadband and the circular polarization; A kind of lamination double-fed circularly polarized micro-strip paster antenna based on the LTCC technology is provided; This antenna not only can have been taken into account the performance requirement of micro-strip paster antenna low section, broadband and circular polarization better, can also carry out an amount of adjusting to the antenna frequency band easily simultaneously.
Technical scheme of the present invention is following:
A kind of LTCC lamination double-fed circularly polarized micro-strip paster antenna;, comprising to shown in Figure 5 like Fig. 1: layer dielectric substrate 1, middle level medium substrate 3, upper layer medium substrate 5, Wilkins power splitter 12,90 degree phase shift microstrip lines 14, upper strata radiation metal paster 7, lower floor's width of cloth radioglold belong to paster 4 and ground metal layer 2.Said Wilkins power splitter 12 and 90 degree phase shift microstrip lines 14 are positioned at the lower surface of layer dielectric substrate 1; Ground metal layer 2 is positioned at the upper surface of layer dielectric substrate 1; Lower floor's radiation metal paster 4 is positioned at the upper surface of middle level medium substrate 3, and upper strata width of cloth radioglold belongs to the upper surface that paster 7 is positioned at upper layer medium substrate 5.
Upper strata radiation metal paster 7, lower floor's width of cloth radioglold belongs to paster 4 and ground metal layer 2 is parallel to each other; Three's shape is all square and corresponding sides are parallel to each other, and three's geometric center is in together on the centre normal of whole paster antenna and passes the metal grounding pin 11 that middle level medium substrate 3, lower floor's width of cloth radioglold belong to paster 4 and upper layer medium substrate 5 through one and interconnects; The area of upper strata radiation metal paster 7 belongs to paster 4 less than lower floor's width of cloth radioglold, and lower floor's width of cloth radioglold belongs to the area of the area of paster 4 less than ground metal layer 2;
On two limits of upper strata radiation metal paster 7, be connected with a rectangle frequency modulation electrode patch 6 respectively, belong to being parallel to respectively on two limits on two limits that upper strata radiation metal paster 7 do not connect rectangle frequency modulation electrode patch 6 of paster 4 at lower floor's width of cloth radioglold and be connected with a rectangle frequency modulation electrode patch 10 respectively; Have two square type windows on the upper layer medium substrate 5, belong to two rectangle frequency modulation electrode patch 10 that paster 4 links to each other to spill with lower floor width of cloth radioglold;
Said Wilkins power splitter 12 will be divided into the output signal that two-way power equates through the radiofrequency signal of feed input A input; Wherein one tunnel output signal meets distributing point B behind 90 degree phase shift microstrip lines, 14 phase shifts, 90 degree, and another road output signal directly meets distributing point C; Phase shift difference is that two distributing point B, C of 90 degree vertically pass metal feed pin that layer dielectric substrate 1, ground metal layer 2, middle level medium substrate 3, lower floor's width of cloth radioglold belong to paster 4 and upper layer medium substrate 5 through one respectively and are connected to upper strata width of cloth radioglold and belong on the paster 7; The metal feed pin belongs to paster 4 with ground metal layer 2 and lower floor's width of cloth radioglold and insulate mutually passing ground metal layer 2 when belonging to paster 4 with lower floor's width of cloth radioglold.
Said layer dielectric substrate 1, middle level medium substrate 3 and upper layer medium substrate 5 adopt LTCC curtain coating ceramic diaphragm laminations to form; Said Wilkins power splitter 12 and 90 degree phase shift microstrip lines 14, ground metal layer 2, upper strata radiation metal paster 7 and lower floor's width of cloth radioglold belong to paster 4 and adopt the silver slurry to be printed in the respective media substrate surface, whole LTCC lamination double-fed circularly polarized micro-strip paster antenna through curtain coating, printing, lamination, punch, fill out silver, etc. form behind static pressure and the sintering process.
Need to prove:
1, the live width that is used to print the microstrip line of Wilkins power splitter 12 and 90 degree phase shift microstrip lines 14 should suitably be regulated according to the dielectric constant size and the thickness of substrate; Two sections crooked microstrip line characteristic impedances to guarantee power splitter are 75 ohm, and all the other microstrip line characteristic impedances are 50 ohm.
2, lower floor's width of cloth radioglold area size of belonging to paster 4 should make the corresponding resonant frequency point of this layer radiation patch be lower than the center frequency points of whole LTCC lamination double-fed circularly polarized micro-strip paster antenna; The area size that upper strata width of cloth radioglold belongs to paster 7 should make the corresponding resonant frequency point of this layer radiation patch be higher than the center frequency points of whole LTCC lamination double-fed circularly polarized micro-strip paster antenna.
3, lower floor's width of cloth radioglold belong to paster 4 and upper strata width of cloth radioglold belong to paster 7 two rectangle frequency modulation electrodes separately be used to finely tune under width of cloth radioglold belong to the resonant frequency point of paster.Length through cutting these two rectangle frequency modulation electrodes or fluting in the above can be regulated the resonance centre frequency and the input impedance of this layer radiation patch to a certain extent.
4, have two square type windows on the upper layer medium substrate 5; With the purpose that spills with lower floor width of cloth radioglold belongs to two rectangle frequency modulation electrode patch 10 that paster 4 links to each other is convenient through the length of these two rectangle frequency modulation electrodes of cutting or fluting in the above, can regulate lower floor's width of cloth radioglold to a certain extent and belong to paster 4 resonance centre frequency and input impedance.
5, adopt metal grounding pin 11 that the geometric center of ground metal layer 2, lower floor's radiation metal paster 4 and upper strata radiation metal paster 7 is communicated with; Its purpose is: guarantee that 1) lower floor's radiation metal paster 4 and upper strata radiation metal paster 7 and the electromotive force of the contact point of metal grounding pin 11 are zero, the resonance frequency of adjusting lower floor that so just can be relatively independent or upper strata radiation metal paster; 2) add that the metal grounding pin also helps the gain that improves entire antenna.
6, the relative dielectric constant scope of layer dielectric substrate 1, middle level medium substrate 3 and the upper layer medium substrate 5 LTCC ceramic material that adopts is between 2～100.
The present invention compared with prior art; Have following advantage and beneficial effect: 1) main feature of this antenna structure is through the LTCC typography; Through the power splitter that prints SF single feed is converted into the duplex feeding that differs 90 degree at the microstrip antenna bottom, thereby can produces good circular polarization performance; 2) take two to be higher than entire antenna centre frequency and the radiation metal paster that is lower than the entire antenna centre frequency respectively, make its radiation bandwidth mutual superposition, thus the bandwidth of efficient extn entire antenna; 3) through increase the frequency modulation electrode in radiation metal paster both sides, can be easily to suitable adjusting is carried out in the resonance frequency and the input impedance of two-layer radiation metal paster up and down; 4) through hole through LTCC with fill out the up/down perforation that the silver technology realizes metal feed pin and metal grounding pin.In addition; This antenna has made full use of advanced lamination and the layer thickness control technology of LTCC, has guaranteed that the tight no gap between the different laminations combines, and forms fine and close integral structure; Improved the stability and the reliability of antenna, and sectional thickness can be controlled in the very little scope.The present invention is with respect to the micro-strip paster antenna of routine based on organic media or ceramic substrate; Not only can under the same size restriction, obtain the wideer beamwidth of antenna; The circular polarization performance of antenna is better simultaneously, and in addition, the resonance frequency of antenna and bandwidth also can suitably be regulated eaily.
Description of drawings
Fig. 1 is that the structure of LTCC lamination double-fed circularly polarized micro-strip paster antenna of the present invention is launched sketch map.
Fig. 2 is a LTCC lamination double-fed circularly polarized micro-strip paster antenna top surface structure sketch map of the present invention.
Fig. 3 is lower floor's radiation metal paster structure sketch map of LTCC lamination double-fed circularly polarized micro-strip paster antenna of the present invention.
Fig. 4 is the structural representation of the ground metal layer of LTCC lamination double-fed circularly polarized micro-strip paster antenna of the present invention.
Fig. 5 is a LTCC lamination double-fed circularly polarized micro-strip paster antenna of the present invention bottom surface structural representation.
Fig. 6 is the relation between LTCC lamination double-fed circularly polarized micro-strip paster antenna operating frequency of the present invention and the reflection loss S11.
Embodiment
Below in conjunction with accompanying drawing and a kind of execution mode, the present invention is done further detailed description, but execution mode of the present invention is not limited thereto.
As shown in Figure 6; The center frequency point of the micro-strip paster antenna that embodiment of the present invention provides is 1.268GHz, and for the little band of BD-2 type receives paster antenna, the present invention can be in the sectional thickness of 3mm; Realize that impedance bandwidth surpasses the micro-strip paster antenna of 40MHz, and the axial ratio of antenna can be less than 1.5.
As scheme Fig. 1 to shown in Figure 5, and a kind of LTCC lamination double-fed circularly polarized micro-strip paster antenna provided by the invention comprises: layer dielectric substrate 1: it is 0.1mm that this substrate adopts 5 thickness, dielectric constant is that 14 LTCC tape casting diaphragm lamination forms.Base lower surface employing silver slurry is printed with a Wilkins power splitter and adds 90 degree phase shift microstrip lines; The live width of microstrip line guarantees that through optimizing two sections crooked microstrip line characteristic impedances of power splitter are 75 ohm, and all the other microstrip line characteristic impedances are 50 ohm.A point on the microstrip line is external coaxial feed point, and B point and C point vertically are connected on the upper strata radiation metal paster 7 through the feed electrode respectively for phase shift difference is two distributing points of 90 degree.Upper surface of base plate adopts the silver slurry to be printed with ground metal layer 2 middle level medium substrates 3: it is 0.1mm that this substrate adopts 12 thickness, and dielectric constant is that 14 LTCC tape casting diaphragm lamination forms.Its upper surface center is printed with foursquare lower floor radiation metal paster 4; The area size of radiation patch should make the resonant frequency point of lower floor's radiation metal paster 4 be lower than the center frequency points of entire antenna slightly, and we select at this is that frequency 1.253MHz than the low 15MHz of centre frequency 1.268GHz is as resonant frequency point.Simultaneously, each has printed a fritter rectangle frequency modulation electrode 10 more in the centre position on lower floor radiation metal paster 4 adjacent both sides.On lower floor's radiation patch 4; The place that two metal feed pin of antenna are passed through has the through hole that diameter is 0.5mm equally; And through hole has been carried out filling out silver handled; But around through hole, leave not printed silver slurry of a ringlet medium, insulate mutually with following radiation metal paster 4 layer by layer to guarantee two metal feed pin.Centermost at lower floor's radiation metal paster 4 has the through hole that a diameter is 0.5mm, and this through hole is also handled through filling out silver.This through hole makes and links to each other through metal grounding pin 11 between centermost and the ground metal layer of lower floor's radiation metal paster 4.
Upper layer medium substrate 5: it is 0.1mm that this substrate adopts 12 thickness, and dielectric constant is that 14 LTCC tape casting diaphragm lamination forms.Its upper surface center is printed with a foursquare upper strata radiation metal paster 7.The size of upper strata radiation metal paster 7 areas should make the center frequency points of a little higher than entire antenna of upper strata radiation metal paster 7 resonant frequency points, and we select at this is that frequency 1.283MHz than the high 15MHz of centre frequency 1.268GHz is as resonant frequency point.Simultaneously, also each has printed the frequency modulation electrode 6 of a fritter rectangle more in the centre position on radiation metal paster 7 adjacent both sides on the upper strata, and the frequency modulation electrode of position and lower floor's radiation metal paster 4 is relative.On the upper layer medium substrate corresponding to lower floor's radiation metal paster 4 on frequency modulation electrode 10 directly over have two rectangular channels, to expose two rectangle frequency modulation electrodes of lower floor's radiation metal paster.The through hole that it is 0.5mm that the place that two metal feed pin of antenna are passed through on upper layer medium substrate 5 has two diameters, and through hole has been carried out filling out silver handled, make two metal feed pin of antenna to link to each other with upper strata radiation metal paster 7.On upper layer medium substrate 5; With the 11 pairing positions of metal grounding pin on the middle level medium substrate 3 through hole that also to have a diameter be 0.5mm; And carried out filling out silver and handled, to realize through metal grounding pin 11 with the connection between upper strata radiation metal paster 7, lower floor's radiation metal paster 4 and ground metal layer 2 threes.
Metal feed pin: the metal feed pin that it is 0.5mm that this antenna has two vertical diameters; Through the through hole in the LTCC technology with fill out silver and handle to realize up/down perforation; Be communicated with between the B of the bottom surface of these two metal feed pin and upper strata radiation metal paster 7 and antenna, the C feed electricity point, and and all insulate between ground metal layer 2 and the lower floor's radiation metal paster 4.
Metal grounding pin 11: the grounding pin electrode that it is 0.5mm that this antenna has a vertical diameter; It is through the through hole in the LTCC technology and fill out silver processing realization up/down perforation, and metal grounding pin 11 links to each other the centermost that upper strata radiation metal paster 7, lower floor's width of cloth radioglold belong to paster 4 and ground metal layer 2.
Claims (3)
1. LTCC lamination double-fed circularly polarized micro-strip paster antenna comprises: layer dielectric substrate (1), middle level medium substrate (3), upper layer medium substrate (5), Wilkins power splitter (12), 90 degree phase shift microstrip lines (14), upper strata radiation metal paster (7), lower floor's width of cloth radioglold belong to paster (4) and ground metal layer (2); Said Wilkins power splitter (12) and 90 degree phase shift microstrip lines (14) are positioned at the lower surface of layer dielectric substrate (1); Ground metal layer (2) is positioned at the upper surface of layer dielectric substrate (1); Lower floor's radiation metal paster (4) is positioned at the upper surface of middle level medium substrate (3), and upper strata width of cloth radioglold belongs to the upper surface that paster (7) is positioned at upper layer medium substrate (5);
Upper strata radiation metal paster (7), lower floor's width of cloth radioglold belong to paster (4) and ground metal layer (2) is parallel to each other; Three's shape is all square and corresponding sides are parallel to each other, and three's geometric center is in together on the centre normal of whole paster antenna and passes the metal grounding pin (11) that middle level medium substrate (3), lower floor's width of cloth radioglold belong to paster (4) and upper layer medium substrate (5) through one and interconnects; The area of upper strata radiation metal paster (7) belongs to paster (4) less than lower floor's width of cloth radioglold, and lower floor's width of cloth radioglold belongs to the area of the area of paster (4) less than ground metal layer (2);
It is characterized in that:
On two limits of upper strata radiation metal paster (7), be connected with a rectangle frequency modulation electrode patch (6) respectively, belong to being parallel to respectively on two limits on two limits that upper strata radiation metal paster (7) do not connect rectangle frequency modulation electrode patch (6) of paster (4) at lower floor's width of cloth radioglold and be connected with a rectangle frequency modulation electrode patch (10) respectively; Have two square type windows on the upper layer medium substrate (5), belong to two rectangle frequency modulation electrode patch (10) that paster (4) links to each other to spill with lower floor width of cloth radioglold;
Said Wilkins power splitter (12) will be divided into the output signal that two-way power equates through the radiofrequency signal of feed input A input; Wherein one tunnel output signal meets distributing point B behind 90 degree phase shift microstrip line (14) phase shifts, 90 degree, and another road output signal directly meets distributing point C; Phase shift difference is that two distributing point B, C of 90 degree vertically pass metal feed pin that layer dielectric substrate (1), ground metal layer (2), middle level medium substrate (3), lower floor's width of cloth radioglold belong to paster (4) and upper layer medium substrate (5) through one respectively and are connected to upper strata width of cloth radioglold and belong on the paster (7); The metal feed pin belongs to paster (4) with ground metal layer (2) and lower floor's width of cloth radioglold and insulate mutually when passing ground metal layer (2) and lower floor's width of cloth radioglold and belong to paster (4);
Said layer dielectric substrate (1), middle level medium substrate (3) and upper layer medium substrate (5) adopt LTCC curtain coating ceramic diaphragm lamination to form; Said Wilkins power splitter (12) and 90 degree phase shift microstrip lines (14), ground metal layer (2), upper strata radiation metal paster (7) and lower floor's width of cloth radioglold belong to paster (4) to be adopted silver to starch to be printed in the respective media substrate surface, whole LTCC lamination double-fed circularly polarized micro-strip paster antenna through curtain coating, printing, lamination, punch, fill out silver, etc. form behind static pressure and the sintering process.
2. LTCC lamination double-fed circularly polarized micro-strip paster antenna according to claim 1; It is characterized in that the area size that lower floor's width of cloth radioglold belongs to paster (4) should make the corresponding resonant frequency point of this layer radiation patch be lower than the center frequency points of whole LTCC lamination double-fed circularly polarized micro-strip paster antenna; The area size that upper strata width of cloth radioglold belongs to paster (7) should make the corresponding resonant frequency point of this layer radiation patch be higher than the center frequency points of whole LTCC lamination double-fed circularly polarized micro-strip paster antenna.
3. LTCC lamination double-fed circularly polarized micro-strip paster antenna according to claim 1; It is characterized in that the relative dielectric constant scope of layer dielectric substrate (1), middle level medium substrate (3) and upper layer medium substrate (5) the LTCC ceramic material that adopts is between 2～100.
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| CN 201019087048 CN101859927B (en) | 2010-04-14 | 2010-04-14 | LTCC lamination double-fed circularly polarized micro-strip paster antenna |
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| CN 201019087048 CN101859927B (en) | 2010-04-14 | 2010-04-14 | LTCC lamination double-fed circularly polarized micro-strip paster antenna |
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| ATE551753T1 (en) * | 2008-02-04 | 2012-04-15 | Commw Scient Ind Res Org | CIRCULAR POLARIZED GROUP ANTENNA |
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2010
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101510630A (en) * | 2009-03-30 | 2009-08-19 | 电子科技大学 | LTCC lamination microstrip patch antenna |
| CN101546864A (en) * | 2009-05-08 | 2009-09-30 | 电子科技大学 | Micro-strip patch ceramic antenna with back cavity electrode |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106571520A (en) * | 2016-11-09 | 2017-04-19 | 宁波大学 | Antenna having filtering function |
| CN110828425A (en) * | 2019-10-17 | 2020-02-21 | 合肥圣达电子科技实业有限公司 | Anti-irradiation packaging structure and manufacturing method thereof |
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| CN101859927A (en) | 2010-10-13 |
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