CN103872459A - Novel LTCC double-layer single-feed circular polarization micro-strip patch array antenna - Google Patents
Novel LTCC double-layer single-feed circular polarization micro-strip patch array antenna Download PDFInfo
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Abstract
The invention aims to provide a double-layer single-feed circular polarization micro-strip patch array antenna based on the LTCC technology. The double-layer single-feed circular polarization micro-strip patch array antenna comprises an upper LTCC substrate, a lower LTCC substrate, a feed network, an upper radiation metal patch antenna array, a lower radiation metal patch antenna array, a metal probe, a feed port and a grounded metal layer, wherein the lower radiation metal patch antenna array and the feed network are arranged on the upper surface of the lower LTCC substrate, and the upper radiation metal patch antenna array is located on the upper surface of the upper LTCC substrate; the upper radiation metal patch antenna array and the lower radiation metal patch antenna array have the same shape and size, each antenna array is composed of four sub-arrays, each sub-array is composed of four radiation metal patches, each radiation metal patch is in a chamfered square shape, and rectangular gaps are formed in a set of opposite edges of each radiation metal patch. According to the double-layer single-feed circular polarization micro-strip patch array antenna, better consideration is given to performance requirements for the low profile, circular polarization and high gain of the micro-strip patch array antenna, and meanwhile the frequency band width of the antenna is increased greatly.
Description
Technical field
The invention belongs to antenna technical field, be specifically related to the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of novel LTCC.
Background technology
Circular polarized antenna has rotation direction orthogonality; Can receive any polarization incoming wave, its radiated wave also can be received by any poliarizing antenna; The advantages such as circularly polarised wave incides symmetrical target, reflected wave derotation.Array antenna has higher gain than array radiating element, narrower wave beam, stronger directionality and spatial beams scan characteristic.And circularly polarization microstrip patch array antenna not only has advantages of above two kinds of antennas, also have that micro-strip paster antenna section is low, simple in structure, volume is little simultaneously, lightweight, make easy, with low cost, can be conformal with carrier or aircraft, be easy to realize circular polarization characteristics and be easy to be integrated into microstrip circuit when medium advantage.These advantages make it be widely used in fields such as radio communication, airborne communication, satellite fix, long-range remote sensing, Aero-Space.
Circularly polarization microstrip patch array antenna has larger practical application potentiality because of its numerous advantage, but micro-strip paster antenna is similar in fact the resonator system of sealing, this feature makes its frequency band narrow, and modern communications requires it to have wider band bandwidth.The method of at present common broadening micro-strip paster antenna comprises increase substrate thickness, adopts sandwich construction, additional impedance coupling etc., but these are not only bad for the miniaturization of antenna, also make antenna structure more complicated.In addition, realizing aspect micro-strip paster antenna circular polarization, common are at present the method that adopts many feeds and carry out paster corner cut, but the former is increasing the complexity of antenna structure, the gain of antenna is reduced, the latter is higher to the dimension precision requirement of paster corner cut.The contradiction that circularly polarization microstrip patch array antenna is taken into account its low section, circular polarization, high-gain, broadband development is not well solved all the time.
Summary of the invention
The object of the present invention is to provide a kind of bilayer list feedback circularly polarization microstrip patch array antenna based on LTCC technology, this antenna has been taken into account the performance requirement of micro-strip paster antenna low section, circular polarization, high-gain better, greatly improves the band bandwidth of antenna simultaneously.Solve existing circularly polarization microstrip patch array antenna and taken into account the contradiction of its low section, circular polarization, high-gain, broadband development.Technical scheme of the present invention is:
The double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC, comprise upper strata ltcc substrate 1, lower floor's ltcc substrate 2, upper strata radiation metal patch antenna array 4, feeding network 6, lower floor's radiation metal patch antenna array 7, metal probe 11, feed port 12 and ground metal layer 3, wherein, ground metal layer 3 is positioned at the lower surface of lower floor's ltcc substrate 2, lower floor's radiation metal patch antenna array 7 and feeding network 6 are located at the upper surface of lower floor's ltcc substrate 2, upper strata radiation metal patch antenna array 4 is positioned at the upper surface of upper strata ltcc substrate 1, feed port 12 is opened in relevant position on lower floor's ltcc substrate 2 and is also connected with feeding network 6 by metal probe 11, metal probe 11 insulate mutually with ground metal layer 3, it is characterized in that, described upper strata radiation metal patch antenna array 4 and lower floor's radiation metal patch antenna array 7 shapes, measure-alike, be arranged in parallel with ground metal layer 3, each aerial array is made up of four subarrays, each subarray is made up of four radiation metal pasters, and wherein each radiation metal paster is to add on the square of corner cut, one group of opposite side and offers rectangular aperture.
Further, described feeding network 6 adopts quarter-wave transforming section to be connected with metal probe 11, on the corner adopt quadrant ring to scan elbow 8 and connect, adopt top rake ladder 15 to connect in the different strip line junction of width, adopt top rake 13 in T-shaped elbow.
On described upper strata ltcc substrate 1, also have circular window at feed port 12 correspondence positions, to expose metal probe 11; Described ground metal layer 3 is offered and the circular window of feed port 12 same radius at feed port 12 correspondence positions, to expose feed port 12.
Further, in described upper and lower layer radiation metal patch antenna array, between radiation metal paster, spacing is greater than the vacuum wavelength at 1/2 centre frequency place in length and breadth, and the corresponding edge distance of the radiation metal paster distance L TCC substrate of edge is greater than the vacuum wavelength at 1/4 centre frequency place.
Two equal orthogonal degenerate mode shape phase differences in 90 ° of amplitude that in described upper and lower layer radiation metal patch antenna array, radiation metal paster corner cut size will make single-point feedback square patch produce.
The strip line live width of described feeding network 6 is determined by dielectric constant size and the thickness of ltcc substrate, take the impedance of guaranteeing the 1/4 wavelength conversion section being connected with metal probe 11 as 50 ohm, in subarray, the impedance of strip line 17 is 75 ohm, and in array, the impedance of strip line 18 is 100 ohm.
The size of described upper and lower layer radiation metal patch antenna array and thickness relationship Ying Shi lower floor radiation metal patch antenna array 7 resonance of upper and lower layer ltcc substrate, in the frequency lower than the double-deck single feedback circularly polarization microstrip patch array antenna centre frequency of whole LTCC, make upper strata radiation metal patch antenna array 4 resonance in the frequency higher than the double-deck single feedback circularly polarization microstrip patch array antenna centre frequency of LTCC.
The relative dielectric constant of the LTCC ceramic material that described upper and lower layer ltcc substrate adopts is between 2～200.
Described feeding network, upper and lower layer radiation metal patch antenna array and ground metal layer all adopt silver slurry to be printed in corresponding ltcc substrate surface; The double-deck single feedback circularly polarization microstrip patch array antenna of whole LTCC through curtain coating, punching, printing, lamination, etc. static pressure, cutting and sintering aftershaping.
It should be noted that, in the present invention, the radiation metal paster corner cut size of upper and lower layer radiation metal patch antenna array is the principal element of control antenna circular polarization, two equal orthogonal degenerate mode shape phase differences in 90 ° of amplitude that its size will make single-point feedback square patch produce; On one group of opposite side of radiation metal paster, offer rectangular aperture, by regulating the length and width of rectangular aperture can increase the impedance bandwidth of antenna.Feeding network scans elbow 8 at its right angle turn employing quadrant ring and connects, adopt top rake ladder 15 to connect in different live width switchings place, adopt top rake 13 in T-shaped elbow, these three kinds of methods are all carried out effective compensation to the discontinuity of strip transmission line.In addition, the width of the quarter-wave transforming section being connected with metal probe is slightly larger than the diameter of metal probe, is beneficial to the welding of metal probe and quarter-wave transforming section; The circular window of offering on the ltcc substrate of upper strata does not only affect the circular polarization characteristics of antenna, also helps the gain that improves whole antenna.
Advantage of the present invention and beneficial effect are as follows:
1. one of main feature of this antenna is to adopt SF single feed, utilizes square patch to cut diagonal angle and realizes the form of circular polarization, thereby make it simple in structure, facilitates its processing.
2. adopt the form of opening rectangular aperture at metal radiation paster opposite side, utilize gap perturbation method that the frequency bandwidth of antenna is promoted greatly, also make the axial ratio of antenna be optimized simultaneously, greatly reduce the requirement on machining accuracy to paster corner cut.
3. adopt different discontinuity compensating forms at the different converting interface place of strip line, the energy reflection of transmission line is reduced, thereby improved the entire gain of antenna.
4. the window of opening on the ltcc substrate of upper strata adopts circular form, not only facilitates the welding between metal probe and transmission line, and does not affect the circular polarization of antenna entirety, has also increased the overall frequency bandwidth of antenna simultaneously.
5. this antenna takes full advantage of the advantage of LTCC technology, to carrying out tight gapless combination between different laminations, make it form fine and close integral structure, not only improve the machining accuracy of antenna, its stability and reliability are promoted greatly, also make antenna entirety be easier to carry out integrated with the T/R control assembly of antenna rear end simultaneously.
To sum up, the present invention is the Section of Microstrip Antenna Array based on organic media or ceramic substrate with respect to routine, and not only under identical array element number restriction, size is less, gain is higher, circular polarization performance is better, and its frequency bandwidth is also wider, in addition, the structure of antenna also makes it be easier to processing.
Accompanying drawing explanation
Fig. 1 is that the structure of the double-deck single feedback circularly polarization microstrip patch array antenna of LTCC of the present invention is launched schematic diagram.
Fig. 2 is the double-deck single circularly polarization microstrip patch array antenna lower floor radiation metal patch antenna array structural representation of presenting of LTCC of the present invention.
Fig. 3 is the double-deck single feedback of LTCC of the present invention circularly polarization microstrip patch array antenna upper strata radiation metal patch antenna array structural representation.
Fig. 4 is the double-deck single feedback circularly polarization microstrip patch array antenna radiation metal patch antenna array 2X2 of the lower floor subarray structural representation of LTCC of the present invention.
Fig. 5 is the double-deck single feedback circularly polarization microstrip patch array antenna ground metal layer upward view of LTCC of the present invention.
Fig. 6 is the relation curve between the double-deck single feedback circularly polarization microstrip patch array antenna operating frequency of LTCC of the present invention and reflection loss S11.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
The center frequency point of the Section of Microstrip Antenna Array that the present embodiment provides is 10GHz, as shown in Figure 6, the present invention can, in the sectional thickness of 2mm, realize impedance bandwidth and reach 1.5GHz, the maximum Section of Microstrip Antenna Array that exceedes 16.7dB of gain, and the axial ratio of antenna can be less than 1.5dB.
The double-deck SF single feed circularly polarization microstrip patch of a kind of LTCC array antenna that the present embodiment provides, comprising:
Upper strata ltcc substrate 1: it is 0.1mm that this substrate adopts 10 thickness, and the LTCC tape casting diaphragm that dielectric constant is 5.9 is overrided to form, and substrate lateral dimension is 74.2mm, and longitudinal size is 76.3mm.Upper surface of base plate adopts silver slurry to be printed with the radiation metal paster of the same size of 4X4 unit number, form upper strata radiation metal patch antenna array, radiation metal paster is apart from substrate the right and left 8mm, the upper and lower both sides 9.4mm of distance, horizontal spacing between radiation metal paster is 17.8mm, and longitudinal pitch is 17.4mm.On the diagonal angle of radiation metal paster, carry out corner cut to realize circular polarization, corner cut is the isosceles right triangle of length of side 1.2mm, and on opposite side, having long is 0.6mm, and wide is the rectangular aperture of 0.2mm.Have near centre the circular window 5 that a radius is 2.5mm at substrate, to expose metal probe 11 and 1/4 wavelength conversion section 10, thereby conveniently it is welded.
Lower floor's ltcc substrate 2: it is 0.1mm that this substrate adopts 10 thickness, and the LTCC tape casting diaphragm that dielectric constant is 5.9 is overrided to form, and substrate size is identical with top substrate layer 1.Upper surface of base plate adopts silver slurry to be printed with radiation metal paster and the feeding network 6 of the same size of 4X4 unit number.Structure, the size of lower floor's radiation metal patch antenna array 7 are identical with upper strata radiation metal patch antenna array 4, and its position on lower laminar substrate is identical with the position of upper strata radiation metal patch antenna array 4 in top substrate layer.The length of strip line 14 and 10 is 1/4 times of Propagation wavelength, and what be connected with 1/4 wavelength conversion section 14 scans 1/4 annulus that elbow 8 is half path length 2.7mm, 1/4 annulus that scans elbow 8 and be half path length 2mm being connected with 1/4 wavelength conversion section 14.1/4 wavelength conversion section 14 is positioned at the not geometric center position, base before corner cut of lower floor's radiation metal paster 7, when the strip transmission line of other different size connects, the geometric center of its fillet overlaps, and strip transmission line 17 is identical with the distance of strip line or radiation patch and radiation patch to adjacent metal radiation patch.The top rake 13 at T connector place is isosceles triangle.Have near centre position the through hole that a radius is 0.65mm at substrate, the distance of center circle of through hole is identical from the both sides up and down of 1/4 wavelength conversion section 10, is 0.95mm apart from the right, and through hole is for inserting metal probe 11.The width of feeding network 6 guarantees that through optimizing the impedance of its 1/4 wavelength conversion section 10 is 50 ohm, and the impedance of strip line 17 is 75 ohm, and the impedance of 1/4 wavelength conversion section 14 is 100 ohm.
Ground metal layer 3: ground metal layer 3 is positioned at the lower surface of lower floor's ltcc substrate 2, is being equipped with near interposition the circular hole 16 that a radius is 2mm.Circular window 5 on circular hole 16, metal probe 11 and upper strata ltcc substrate 1, three's geometric center is positioned on same Z axis.
Claims (9)
1. the double-deck single feedback circularly polarization microstrip patch array antenna of LTCC, comprise upper strata ltcc substrate (1), lower floor's ltcc substrate (2), upper strata radiation metal patch antenna array (4), feeding network (6), lower floor's radiation metal patch antenna array (7), metal probe (11), feed port (12) and ground metal layer (3), wherein, ground metal layer (3) is positioned at the lower surface of lower floor's ltcc substrate (2), lower floor's radiation metal patch antenna array (7) and feeding network (6) are located at the upper surface of lower floor's ltcc substrate (2), upper strata radiation metal patch antenna array (4) is positioned at the upper surface of upper strata ltcc substrate (1), feed port (12) is opened in the upper relevant position of lower floor's ltcc substrate (2) and is connected with feeding network (6) by metal probe (11), metal probe (11) insulate mutually with ground metal layer (3), it is characterized in that, described upper strata radiation metal patch antenna array (4) and lower floor's radiation metal patch antenna array (7) shape, measure-alike, be arranged in parallel with ground metal layer (3), each aerial array is made up of four subarrays, each subarray is made up of four radiation metal pasters, and wherein each radiation metal paster is to add on the square of corner cut, one group of opposite side and offers rectangular aperture.
2. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, described feeding network (6) adopts quarter-wave transforming section to be connected with metal probe (11), on the corner adopting quadrant ring to scan elbow (8) connects, adopt top rake ladder (15) to connect in the different strip line junction of width, adopt top rake (13) in T-shaped elbow.
3. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, described upper strata ltcc substrate (1) is upper also has circular window at feed port correspondence position, to expose metal probe (11); Described ground metal layer (3) is offered and the circular window of feed port same radius at feed port correspondence position, to expose feed port.
4. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, in described upper and lower layer radiation metal patch antenna array (4,7), between radiation metal paster, spacing is greater than the vacuum wavelength at 1/2 centre frequency place in length and breadth, and the corresponding edge distance of the radiation metal paster distance L TCC substrate of edge is greater than the vacuum wavelength at 1/4 centre frequency place.
5. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, in described upper and lower layer radiation metal patch antenna array (4,7), radiation metal paster corner cut size makes two equal orthogonal degenerate mode shape phase differences in 90 ° of amplitude that single-point feedback square patch produces.
6. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1 or 2, it is characterized in that, the strip line live width of described feeding network (6) is determined by dielectric constant size and the thickness of ltcc substrate, the impedance that makes the 1/4 wavelength conversion section being connected with metal probe (11) is 50 ohm, the impedance of strip line in subarray (17) is 75 ohm, and the impedance of strip line in array (18) is 100 ohm.
7. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, thickness relationship Ying Shi lower floor radiation metal patch antenna array (7) resonance of the size of described upper and lower layer radiation metal patch antenna array (4,7) and upper and lower layer ltcc substrate (1,2), in the frequency lower than the double-deck single feedback circularly polarization microstrip patch array antenna centre frequency of whole LTCC, makes upper strata radiation metal patch antenna array (4) resonance in the frequency higher than the double-deck single feedback circularly polarization microstrip patch array antenna centre frequency of LTCC.
8. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, the relative dielectric constant of the LTCC ceramic material that described upper and lower layer ltcc substrate adopts is between 2～200.
9. by the double-deck single feedback circularly polarization microstrip patch array antenna of a kind of LTCC described in claim 1, it is characterized in that, described feeding network (6), upper and lower layer radiation metal patch antenna array (4,7) and ground metal layer (3) all adopt silver slurry to be printed in corresponding ltcc substrate surface; The double-deck single feedback circularly polarization microstrip patch array antenna of whole LTCC through curtain coating, punching, printing, lamination, etc. static pressure, cutting and sintering aftershaping.
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| CN104201480A (en) * | 2014-07-16 | 2014-12-10 | 电子科技大学 | Novel LTCC laminate circular polarization microstrip antenna |
| CN104505588A (en) * | 2014-12-26 | 2015-04-08 | 中国电子科技集团公司第三十八研究所 | Dual-circular polarization microstrip antenna array |
| CN104979628A (en) * | 2015-06-29 | 2015-10-14 | 北京华航海鹰新技术开发有限责任公司 | Multi-frequency antenna device |
| CN105024154A (en) * | 2015-07-08 | 2015-11-04 | 东莞电子科技大学电子信息工程研究院 | Multi-element low-temperature co-fired ceramic (LTCC) microwave radio-frequency circuit and method for using same |
| CN105576362A (en) * | 2015-12-25 | 2016-05-11 | 哈尔滨工业大学（威海） | Miniature broadband antenna device |
| CN105789872A (en) * | 2016-03-25 | 2016-07-20 | 广东工业大学 | Compact circular polarization array antenna of 5.8GHzISA frequency range |
| CN106025533A (en) * | 2016-07-11 | 2016-10-12 | 北京航大泰科信息技术有限公司 | Left-handed circularly polarized antenna |
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| CN106981719A (en) * | 2017-05-16 | 2017-07-25 | 广东工业大学 | A kind of circular polarised array antenna and communication equipment |
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