• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Multiband antenna type patch with cross feed system. It comprises a plurality of layers (c1 ... Cn) stacked together forming multiple internal dielectric cavities disposed on the ground plane of the antenna, a first patch (p1), fixed in the upper layer of said stack of layers (c1. ..cn), which includes at least two elongated transmission lines (a) with at least one intersection zone, and are electrically powered by the ends of said transmission lines (a). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2540161A1
    申请号:ES201331724
    申请日:2013-11-27
    公开日:2015-07-08
    发明作者:Raul ONRUBIA IBÁÑEZ；Adriano José Camps Carmona
    申请人:Universitat Politecnica de Catalunya UPC；
    IPC主号:
    专利说明:

    Multi-band patch antenna with cross-feed system.
    Field of the Invention
    The present invention concerns in general the field of antennas, and in particular a multiband patch-type antenna, comprising a plurality of layers stacked together. 5
    State of the art
    An innovation in the field of multiband antennas, for example for GPS navigation systems, has been obtained in the use of antennas formed by different layers from each other, in which the different layers of the structure can work in different frequency bands. 10
     In some cases it is required that the antenna size be as small as possible, such as for the realization of groupings of antennas with small separations between elements (for example, to avoid diffraction lobes). In these cases it is necessary to use dielectric materials between the multiple layers of the antenna.
    Some scientific studies disclose some particular implementations of this type 15 of antennas, for example, Yijun Zhou et al ‘A Novel 1.5” Quadruple Antenna for Trri-Band GPS Applications; Zhou, Y et al ‘Dual Band Proximity-Fed Stacked Patch Antenna for Tri-Band GPS Applications; or F. Zhao et al ‘A circularly polarized aperture stacked patch microstrip antenna for L band’.
    However, the aforementioned studies lead to implementations of high complexity antennas, thus hindering their manufacture and / or obtaining high ohmic losses.
    On the other hand, there are also some commercial antennas on the market, such as those sold under the JavaD Triant, JavaD G3T or Antcom 42GNSSA-XT-1, 52GNSSA-XT-1, TW3870 and 53G1215A-XT-1 brands, although none of them allows to reach the technical characteristics that the antenna proposed in the present invention. For example, in comparison with JavaD antennas, the proposed antenna has higher efficiency and axial ratio values, being much better for polarimetry applications. On the other hand, compared to the Antcom antenna the measured efficiency values and directivity are higher. In the following table some of these differential parameters can be observed between the different antennas available in the market and the antenna 30 proposed in the present invention.
     Net Income Axial Ratio
     L1 L5 L1 L5
     Proposed multiband antenna  4.96 dB 6.78 dB <2.4 dB <3.6 dB

     JavaD Triant  4 dB 5 dB 3 dB Max.
     JavaD G3T  5 dB 6 dB 3 dB Max.


     42GNSSA-XT-1  4.5 dB 3 dB 7 dB 2-3 dB
     52GNSSA-XT-1  3.6 dB 2.4 dB 5 dB 0.5 dB
     TW3870 *  4.5 dB 3 dB <2 dB <2 dB
     53G1215A-XT-1 *  4.7 dB 3.3 dB 2 dB 2 dB
    * Comparison made with an antenna of bands L1 and L2 instead of L1 and L5.
    References
    Zhou, Y .; Chen, C .; and Volakis, J .; Dual Band Proximity-Fed Stacked Patch Antenna for Tri-Band GPS Applications, "IEEE Trans. Anten. And Propag., Vol. 55, No. 1, pp. 220-223, January 2007. 5
    Zhou, Y .; Koulouridis, S .; Kiziltas, G. and Volakis J .; A Novel 1,500 Quadruple Antenna for Tri-Band GPS Applications, "IEEE Atennas and Wireless Propag. Letters, Vol. 5, pp. 224-227, 2006.
    Doust, E.G .; Clenet, M .; Hemmati, V. and Wight, J .; An Aperture-Coupled Circularly Polarized Stacked Microstrip Antenna for GPS Frequency Bands L1, L2, and L5, "Antennas and Propagation Society International Symposium, 2008. AP-S 2008. IEEE, July 2008. 10
    Brief exposition of the invention
     For this purpose, the invention provides a multiband patch-type antenna, comprising according to known techniques, a plurality of layers stacked together forming multiple internal dielectric cavities arranged on the plane of mass of the antenna. According to the proposal of this invention, the antenna includes a first patch, fixed on the upper layer of said 15-layer stack, which includes at least two elongated transmission lines with at least one intersection zone between them, and is electrically powered by the ends of said transmission lines .
    The aforementioned two elongated transmission lines can define, according to some examples of embodiment, either a cross of arms of equal dimensions, a cross of arms of different 20 dimensions, or even a "L" configuration. Generally, the width of the two transmission lines will be constant and their ends will have the same dimensions.
    The different layers stacked together are each tuned to a specific working band. Preferably, the layers closest to the mass plane will have lower frequency bands. In addition, the inner layers of said stack will be connected to ground 25 by its central point.
    According to an embodiment of the invention, the layer adjacent to said upper layer includes a second patch tuned in a frequency band L1 and the lower layer than the previous layer fed in the band L1 includes a third patch tuned in a frequency band L5. 30
    The two antennas thus constructed are polarized according to two linear and orthogonal polarizations. These two polarizations can also be combined with each other to obtain a circular polarization to the right or to the left. This combination is done through a 90º hybrid circuit implemented in the antenna itself or as an external circuit.
    According to a preferred embodiment of the invention, the dielectric used in said dielectric cavities is of the Rogers 4003c type.
    Description of the figures
    The foregoing and other features and advantages will become more apparent from the following detailed description of an exemplary embodiment with reference to the accompanying drawings, in which:
    Fig. 1 is an illustration of the multiband antenna proposed according to embodiment example 5 in which the two elongated transmission lines are perpendicular, in this case of constant width and define a cross of equal arms;
    Fig. 2 is an illustration of the multiband antenna proposed according to the exemplary embodiment in which the two elongated transmission lines are perpendicular, in this case of constant width and define a configuration in ‘L ’; 10
    Fig. 3 shows a cross-section of the multiband antenna proposed for a preferred embodiment, where the different layers, patches and dielectrics that can be used in the fabrication of the antenna are shown.
    Detailed description of some embodiments
    The present invention includes a plurality of C1… Cn layers stacked together forming multiple internal dielectric cavities with the plane of mass of the antenna. Said plurality of layers (C1… Cn) comprises at least 5 layers.
    In a characteristic and particular way of the present invention, the antenna includes a first patch P1, which is fixed in the upper layer C1 of said stack of layers C1 ... Cn, which includes at least two elongated transmission lines A, with at least one Interference zone of 20 trajectories, and which is electrically powered by the ends of said transmission lines A. Said cross comprises arms of dimensions of about 35 millimeters in length and 5.5 millimeters in width. The last layer Cn will be used as mass plane.
    With reference to Fig. 1, according to a first embodiment example, the multiband antenna proposed for the case in which said transmission lines A of the first patch 25 P1 is formed forms a cross shape of arms of equal dimensions .
    Alternatively, according to another embodiment of the proposed antenna, in this case not illustrated in this description, said cross could include arms of different dimensions.
    Referring now to Fig. 2, a second exemplary embodiment of the present invention is illustrated, where in this case, said transmission lines A of the first patch P1 define a "L" configuration.
    Preferably, the transmission lines A will be perpendicular to each other, and therefore angularly separated by 90 °, although it is not necessary being able to comprise small variations of angular separation. 35
    According to the embodiments shown in Figs. 1 and 2, the aforementioned layers C1 ... Cn stacked together are tuned to a working band, the lower frequency band layers being closer to the ground plane and the inner layers of said stack being connected to ground by their point central.
    The adjacent layer, C2 as illustrated in Figs. 1 and 2, to said upper layer C1 includes a second second patch P2 which is tuned in a frequency band L1 and the lower layer, C3 according to Figs. 1 and 2, to said layer C2 includes a third patch P3 tuned in a frequency band L5. Generally, the second patch P2 of layer C2 will be smaller than the third patch P3 of layer C3.
    The two antennas constructed on the basis of stacking the layers described above have two linear and orthogonal polarizations. If required, the two polarizations can be combined to obtain a right or left circular polarization. The combination will preferably be performed by a 90 ° hybrid implemented either in an additional layer, or as an external circuit. 5
    Referring to Fig. 3, a cross-section of the present invention is shown according to a preferred embodiment including the optimal dimensions of the proposed antenna.
    The proposed multiband antenna can consist of a GPS and Galileo bibanda antenna: L1 and L5 (GPS) and E1 and E5 (Galileo), where the said layer stack C1 ... Cn consists of 5 layers with Rogers 4003c dielectric, all of them defining a quadrangular or similar plan structure 10 of dimensions 95.1 x 95.1 mm.
    Each of the dielectric cavities has the same thickness, chosen in such a way that optimum bandwidth specifications are achieved. This is because increasing losses increases bandwidth at the cost of reducing adaptation. Therefore, in this preferred implementation, a total of 5 layers of Rogers 4003c dielectric, of about 1.5 mm each, have been used to achieve the aforementioned specifications. For the bonding of the Rogers 4003c dielectric, a Rogers 4450b glue of a thickness of 101µm is preferably used as it has a dielectric constant similar to that of the Rogers 4003c. While other types of adhesives such as an epoxy resin could also be used.
    The arms of the cross of the aforementioned example corresponding to the preferred embodiment have been prepared in this case with a rectangular shape with a size of 35,708 millimeters in length by 5,460 millimeters in width, the second patch P2 is a square of 48,113 mm side and the third patch P3 is a square of 61.033 mm side. In addition, the distance from the center of the antenna to the feeding points is 12,650 millimeters.
    Modifications and variations will occur to one skilled in the art from the exemplary embodiments shown and described without departing from the scope of the present invention as defined in the appended claims.
    权利要求:
    Claims (15)
    [1]

    [ 1]
     1. Multi-band patch-type antenna comprising a plurality of layers (C1… Cn) stacked together forming multiple internal dielectric cavities arranged on the plane of mass of the antenna, characterized in that it comprises a first patch (P1), fixed in the 5 upper layer of said stack of layers (C1… Cn), which includes at least two elongated transmission lines (A) with at least one intersecting zone of its paths, and is electrically powered by the ends of said transmission lines ( TO).

    [2]
    2. Antenna according to claim 1, characterized in that said two elongated transmission lines (A) are perpendicular and define a cross, of equal or different arms.

    [3]
    3. Antenna according to claim 1, characterized in that said two elongated transmission lines (A) are perpendicular and define an "L" configuration, of equal or different sides.

    [4]
    4. Antenna according to claim 1, characterized in that each of said plurality of layers (C1… Cn) stacked together is tuned to a working band, the layers of lower frequency bands closest to the mass plane being located. twenty

    [5]
    5. Antenna according to claim 4, characterized in that the inner layers of said stack are connected to ground by their central point.

    [6]
    Antenna according to claim 5, characterized in that the layer adjacent to said upper layer comprises a second patch (P2) tuned in a frequency band L1 and the lower layer to said layer fed in the band L1 comprises a third patch (P3 ) tuned in a frequency band L5.

    [7]
    7. Antenna according to claim 6, characterized in that said second patch (P2) tuned in the band L1 is lower has said third patch (P3) tuned in the band L5.

    [8]
    8. Antenna according to claim 1, characterized in that said plurality of layers (C1… Cn) generate two linear and orthogonal polarizations.
    [9]
    9. Antenna according to claim 8, characterized in that said two linear and orthogonal polarizations can be appropriately combined using a 90 ° hybrid circuit to obtain left and / or right circular polarizations.

    [10]
    10. Antenna according to claim 1, characterized in that each of the dielectric cavities 40 of said multiple dielectric cavities formed has the same thickness.

    [11]
    11. Antenna according to the preceding claims, characterized in that said plurality of layers (C1… Cn) comprises at least 5 layers.
    [12]
    12. Antenna according to the preceding claims, characterized in that said plurality of layers (C1… Cn) are quadrangular in plan.

    [13]
    13. Antenna according to the preceding claims, characterized in that said dielectric cavities comprise a Rogers 4003c dielectric. fifty

    [14]
    14. Antenna according to claim 2, characterized in that said cross comprises arms of dimensions of about 35 millimeters in length and 5.5 millimeters in width.
    Fig. 1
    Fig 2

    Fig. 3
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    同族专利:
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    ES2540161B2|2015-10-08|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CN109273829A|2018-09-21|2019-01-25|上海海积信息科技股份有限公司|A kind of satellite navigation array antenna|
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