A dual-polarized end-fire antenna

Abstract

The present invention discloses a dual-polarized end-fire antenna, which includes a dielectric body, a first radiator, and a second radiator. The first radiator is in a horn structure, and a first feeding network is arranged at the small end of the horn. The second radiator is in a V-shaped structure, and a groove is formed at the bottom thereof, and a second feeding network is arranged in the groove. The first radiator and the second radiator are both arranged on the dielectric body. The second radiator can wrap the small end of the horn of the first radiator, and there is a continuous gap between the second radiator and the first radiator. The present invention can meet the requirements of the high-speed aircraft platform for the installation performance and dual polarization of the end-fire antenna.

Description

Technical Field

[0001] The present invention belongs to the technical field of antennas, and particularly relates to a dual-polarized end-fire antenna. Background Art

[0002] In contemporary high-speed aircraft platforms, in order not to affect their aerodynamic shapes, the antennas installed on their sides are required to be small in size, thin in thickness, and have end-fire radiation characteristics. At the same time, due to the relatively harsh operating environment of the aircraft platform, the end-fire antenna is greatly affected by the environment after being installed on the aircraft platform. Currently, the existing end-fire antennas are difficult to meet the requirements of high-speed aircraft platforms. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-polarized end-fire antenna, which is easy to install on various aircraft platforms, does not affect their aerodynamic shapes, can perform dual-polarized end-fire, and can also solve the problem of poor installation performance of end-fire antennas.

[0004] The purpose of the present invention is achieved by the following technical solutions:

[0005] A dual-polarized end-fire antenna includes:

[0006] A dielectric body;

[0007] A first radiator, the first radiator is in a horn structure, and a first feeding network is arranged at the small end of the horn.

[0008] A second radiator, the second radiator is in a V-shaped structure, a groove is opened at the bottom thereof, and a second feeding network is arranged in the groove.

[0009] Wherein, the first radiator and the second radiator are both arranged on the dielectric body, the second radiator can wrap the small end of the horn of the first radiator, and there is a continuous gap between the second radiator and the first radiator.

[0010] In one embodiment, the small end of the horn of the first radiator is composed of two symmetric and intersecting first arc structures, and the large end of the horn is a second arc structure connecting the two first arc structures.

[0011] In one embodiment, the V-shaped second radiator has a curvature corresponding to the first arc.

[0012] In one embodiment, the center lines of the first radiator and the second radiator are collinear, and the first feeding network and the second feeding network are both arranged on the center lines of the first radiator and the second radiator.

[0013] In one embodiment, the first feeding network is disposed on the horn small end of the first radiator by means of probe contact feeding.

[0014] In one embodiment, the second feeding network feeds power in the groove of the second radiator by means of coupled feeding.

[0015] In one embodiment, both the first radiator and the second radiator are printed on the dielectric body by means of coating.

[0016] In one embodiment, the dielectric body is disposed on the surface of the carrier, both ends thereof are gradually changing arc-shaped structures, and the bottom thereof is set as a plane or an arc surface so that the dielectric body is conformally disposed with the carrier.

[0017] In one embodiment, the thickness of the dielectric body is The length of the radiator is greater than or equal to the low-frequency free-space wavelength, and the width of the radiator is greater than or equal to where ε r is the dielectric constant of the dielectric body.

[0018] In one embodiment, the dielectric body is made of a dielectric material having a dielectric constant of 2 to 20 and a loss tangent value less than 0.01.

[0019] The beneficial effects of the present invention are as follows:

[0020] (1) It has good installation performance, can be flush-mounted with a flat, conical or cylindrical installation platform, and does not affect the aerodynamic shape of the aircraft.

[0021] (2) The vertical polarization and horizontal polarization radiators have high integration and small size, and have good end-fire radiation characteristics.

[0022] (3) The phase centers of the vertical polarization and horizontal polarization radiators are basically coincident, which is beneficial to polarization synthesis and array synthesis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be described in more detail below based on embodiments and with reference to the drawings. Among them:

[0024] Figure 1 shows a schematic structural diagram of an embodiment of the present invention;

[0025] Figure 2 shows a schematic structural diagram of the dielectric body of an embodiment of the present invention;

[0026] Figure 3 shows a schematic structural diagram of the antenna of the present invention disposed on a conical carrier;

[0027] Figure 4Shows a schematic structural diagram of the antenna of the present invention provided on a cylindrical carrier;

[0028] Figure 5 Shows a schematic side view of the antenna of the present invention provided on a cylindrical carrier;

[0029] Figure 6 Shows the vertical polarization E-plane pattern of the antenna of the present invention at different frequencies;

[0030] Figure 7 Shows the vertical polarization H-plane pattern of the antenna of the present invention at different frequencies;

[0031] Figure 8 Shows the horizontal polarization E-plane pattern of the antenna of the present invention at different frequencies;

[0032] Figure 9 Shows the horizontal polarization H-plane pattern of the antenna of the present invention at different frequencies;

[0033] In the drawings, the same components are denoted by the same reference numerals. The drawings are not drawn to actual scale.

[0034] Reference numerals:

[0035] 100 - Conical carrier, 200 - Cylindrical carrier, 101 - Dielectric body, 102 - First radiator, 103 - Second radiator, 104 - First feeding network, 105 - Second feeding network. Detailed implementation manners

[0036] The present invention will be further described below in conjunction with the drawings.

[0037] The present invention provides a dual-polarized end-fire antenna, as Figure 1 shown, comprising:

[0038] Dielectric body 101;

[0039] First radiator 102, the first radiator 102 has a horn structure, and a first feeding network 104 is provided at the small end of the horn;

[0040] Second radiator 103, the second radiator 103 has a V-shaped structure, a groove is formed at the bottom thereof, and a second feeding network 105 is provided in the groove;

[0041] Wherein, both the first radiator 102 and the second radiator 103 are provided on the dielectric body 101, the second radiator 103 can wrap the small end of the horn of the first radiator 102, and there is a continuous gap between the second radiator 103 and the first radiator 102;

[0042] Specifically, as Figure 1As shown, the small end of the horn of the second radiator 103 is composed of two symmetric and intersecting first arc structures, and its large end of the horn is a second arc structure connecting the two first arc structures;

[0043] Furthermore, the first feeding network 104 is arranged on the small end of the horn of the first radiator 102 by means of probe contact feeding, and the second feeding network 105 is attached in the groove of the second radiator 103.

[0044] Furthermore, the first feeding network 104 and the second feeding network 105 are respectively connected to the system cable through RF connectors;

[0045] It should be noted that the signal feeds high-frequency current through the RF connector, where:

[0046] The first feeding network 104 feeds high-frequency current into the first radiator 102 by means of probe contact feeding, and the first radiator 102 converts the high-frequency current into vertically polarized electromagnetic waves and radiates them into space;

[0047] At the same time, the second feeding network 105 feeds high-frequency current into the second radiator 103 by means of coupled feeding. As Figure 1 shown, the second radiator 103 is in a V-shaped structure, which wraps the first radiator 102, and there is a continuous gap between the second radiator 103 and the first radiator 102. That is, the second radiator 103 converts the high-frequency current into horizontally polarized electromagnetic waves and radiates them into space, that is, a dual-polarized end-fire antenna is formed.

[0048] In one embodiment, as Figure 1 shown, the small end of the horn of the first radiator 102 is composed of two symmetric and intersecting first arc structures, and its large end of the horn is a second arc structure connecting the two first arc structures. The second radiator 103 in a V-shaped structure has a curvature corresponding to the first arc;

[0049] It should be noted that the small end of the horn of the first radiator 102 can be composed of two symmetric and intersecting straight lines. And as Figure 1 shown, the small end of the horn of the first radiator 102 is composed of two symmetric and intersecting first arc structures. On this basis, the two segments of the second radiator 103 are set to have a curvature corresponding to the first arc, so that the second radiator 103 has an arc-shaped emission end, improving the stability of end-fire radiation;

[0050] Furthermore, as Figure 1 shown, the center line of the first radiator 102 is collinear with the center line of the second radiator 103, and both the first feeding network 104 and the second feeding network 105 are arranged on the center lines of the first radiator 102 and the second radiator 103;

[0051] It should be noted that the phase centers of the first radiator 102 and the second radiator 103 basically coincide, which is beneficial to polarization synthesis and array synthesis.

[0052] In one embodiment, the dielectric body 101 is disposed on the surface of the carrier, and both ends thereof are gradually tapered arc-shaped structures, and the bottom thereof is provided as a flat surface or an arc surface, so that the dielectric body 101 is conformally disposed with the carrier;

[0053] Specifically, as Figure 2 and Figure 3 shown, the dielectric body 101 is a dielectric with both ends being gradually tapered, and it is disposed on the conical carrier 100 as Figure 3 shown, and the bottom surface of the dielectric body 101 is as Figure 2 shown, presenting an arc-shaped structure;

[0054] As Figure 2 , Figure 4 and Figure 5 shown, the dielectric body 101 is a dielectric with both ends being gradually tapered, and it is disposed on the conical carriers 200 as Figure 4 and Figure 5 shown, and the bottom surface of the dielectric body 101 presents a flat surface structure;

[0055] That is, according to the shape of the carrier, the bottom surface of the dielectric body 101 can be set as an arc-shaped or flat surface structure, so that it can be flush with the installation platforms of plane, cone and cylinder structures, and thus does not affect the aerodynamic shape of the aircraft.

[0056] In one embodiment, both the first radiator 102 and the second radiator 103 are printed on the dielectric body 101 by plating, and the first radiator 102 and the second radiator 103 are in contact with the surface of the dielectric body 101 and have the same curvature.

[0057] In one embodiment, the thickness of the dielectric body 101 is The length of the radiator is greater than or equal to the low-frequency free-space wavelength, and the width of the radiator is greater than or equal to where ε r is the dielectric constant of the dielectric body;

[0058] It should be noted that in order to make the integration of the vertical polarization and horizontal polarization radiators of the antenna higher, and to reduce the overall size of the antenna, and at the same time enable the antenna to have good end-fire radiation characteristics, the thickness of the dielectric body, as well as the length and width of the radiator, are controlled so that while meeting the emission requirements, the size is smaller and the integration is higher, which is convenient to be disposed on the high-speed aircraft platform.

[0059] Furthermore, the inventor designs the dimensions and structures of the dielectric body 101, the first radiator 102, and the second radiator 103 of the antenna simultaneously, enabling the antenna to be flush-mounted with carrier platforms of various shapes and structures, thus not affecting the aerodynamic shape of the aircraft. Meanwhile, the layout design between the second radiator 103 and the first radiator 102 meets the dual-polarization requirements of the aircraft. Moreover, the antenna not only has a small size but also a higher integration degree of its vertical polarization and horizontal polarization radiators, facilitating its installation on high-speed aircraft platforms.

[0060] In one embodiment, the dielectric body is made of a dielectric material with a dielectric constant of 2 to 20 and a loss tangent value less than 0.01.

[0061] Preferably, the dielectric constant of the dielectric material is 3 to 8.

[0062] As Figure 6 and Figure 7 shown, the vertical polarization E-plane and H-plane patterns of the antenna of the present invention at different frequencies are displayed.

[0063] As Figure 8 and Figure 9 shown, the horizontal polarization E-plane and H-plane patterns of the antenna of the present invention at different frequencies are displayed.

[0064] According to Figures 6 to 9 the content shown, the present antenna has good end-fire characteristics in the entire frequency band.

[0065] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "top", "front", "rear", "inner", "outer", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0066] Although the present invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed, as long as they do not deviate from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the different dependent claims and the features described herein can be combined in a manner different from that described in the original claims. It should also be understood that the features described in connection with a single embodiment can be used in other described embodiments.

Claims

1. A dual-polarized end-fire antenna, characterized in that, Comprising: Dielectric body; The first radiator, the first radiator is in a horn structure, and a first feeding network is arranged at the small end of the horn; The second radiator, the second radiator is in a V-shaped structure, a groove is formed at the bottom thereof, and a second feeding network is arranged in the groove; Wherein, the first radiator and the second radiator are both arranged on the dielectric body, the second radiator can wrap the small end of the horn of the first radiator, and there is a continuous gap between the second radiator and the first radiator; The small end of the horn of the first radiator is composed of two symmetrically intersecting first arc structures, and the large end of the horn is a second arc structure connecting the two first arc structures; The center line of the first radiator is collinear with the center line of the second radiator.

2. The dual-polarized end-fire antenna according to claim 1, wherein The first feeding network and the second feeding network are both arranged on the center lines of the first radiator and the second radiator.

3. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The first feeding network is arranged on the small end of the horn of the first radiator by means of probe contact feeding.

4. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The second feeding network is fed in the groove of the second radiator by means of coupling feeding.

5. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The first radiator and the second radiator are both printed on the dielectric body by means of plating.

6. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The dielectric body is arranged on the surface of the carrier, both ends thereof are gradually changing arc structures, and the bottom thereof is set as a plane or an arc surface so that the dielectric body is conformally arranged with the carrier.

7. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The thickness of the dielectric body is , the length of the radiator is greater than or equal to the low-frequency free-space wavelength, and the width of the radiator is greater than or equal to , where is the dielectric constant of the dielectric body.

8. A dual-polarized end-fire antenna according to claim 1 or 2, characterized in that, The dielectric body is made of a dielectric material with a dielectric constant of and a loss tangent value less than 0.01.

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