Conical surface conformal bipolar antenna
By designing a conical conformal dipole antenna and using an arc-shaped radiator and balun assembly, the problem that traditional dipole antennas cannot fit into curved objects was solved, enabling omnidirectional communication on conical aircraft.
Patent Information
- Application Number
- CN202520162129.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-23
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-01-23
AI Technical Summary
Traditional dipole antennas are linear structures, which cannot meet the shape requirements of objects with curved shapes, such as cylindrical and conical aircraft. At the same time, planar antennas are directional antennas and cannot achieve omnidirectional communication.
Design a conical conformal dipole antenna with an arc-shaped upper radiator, lower radiator, and mounting bracket. Combined with a balun assembly and shielding box, it achieves horizontal omnidirectional radiation without grounding and fits snugly with the conical radome. The phase difference of the balun assembly enables omnidirectional horizontal radiation.
It achieves a close fit with the conical fairing, meets the requirements for all-around radiation, does not require ground contact, and has a horizontal omnidirectional radiation pattern.
Smart Images
Figure CN223967377U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of antenna technology, and specifically relates to a conical conformal bipolar antenna. Background Technology
[0002] Monopole antennas are often used as transceiver antennas for airborne communications. The characteristic of a monopole antenna is that it includes an antenna grounded in. It is often used as the grounding antenna by the metal skin of the aircraft and is mounted on the surface of the aircraft.
[0003] When the antenna has conformal requirements for the aircraft, planar antennas are often chosen. However, planar antennas are basically directional antennas and cannot meet the requirements of omnidirectional communication.
[0004] A typical dipole antenna consists of two linear dipoles with a length of 1 / 4 of the operating wavelength, fed in opposite phase. Compared with monopole antennas, dipole antennas do not need to be grounded. However, traditional dipole antennas are linear structures and cannot meet the shape requirements of objects with curved shapes (such as cylindrical and conical shapes). Summary of the Invention
[0005] To solve the above-mentioned technical problems, this utility model provides a conical conformal bipolar antenna, including an RF connector, an upper radiator, a lower radiator, a mounting bracket, and a balun assembly;
[0006] The RF connector is fixedly connected to the balun module input port; the balun module is fixedly mounted on the mounting bracket.
[0007] The upper and lower radiators are fixedly mounted on the mounting bracket, and are located on both sides of the balun assembly.
[0008] Both the upper and lower radiating bodies are arc-shaped.
[0009] The upper and lower radiators are electrically connected to the output terminals of the balun module, respectively.
[0010] Based on the above technical solution, the present invention can be further improved as follows.
[0011] Furthermore, the balun assembly includes a balun, a first feed post, a second feed post, and a shielding box; the first output terminal of the balun is electrically connected to the upper radiator through the first feed post; the second output terminal of the balun is electrically connected to the lower radiator through the second feed post; and the input terminal of the balun is connected to an RF connector.
[0012] Furthermore, a cover plate is fixedly installed on the shielding box; the cover plate is fastened to the shielding box with screws.
[0013] Furthermore, the mounting bracket is an arc shape that fits against the upper and lower radiators; the central angle of the arc shape is any angle between 130° and 132°.
[0014] Furthermore, the inner radius of the upper radiator is 147mm to 147.5mm, and the outer radius is 140mm to 140.5mm; the width of the upper radiator is 20 to 22mm, and the thickness is 1mm to 1.1mm; the width of the lower radiator is 20 to 22mm, and the thickness is 1mm to 1.1mm; the angle of the upper radiator is 64.5° to 67.8°; the angle of the lower radiator is 64.5° to 67.8°; and the distance between the upper and lower radiators after installation is 9mm to 9.2mm.
[0015] Furthermore, the side of the mounting bracket furthest from the upper and lower radiators is curved.
[0016] Furthermore, both the upper and lower radiators are conductors.
[0017] Furthermore, the upper and lower radiators are fixed to the mounting bracket with screws.
[0018] Furthermore, the two outputs of the balun component are 180 degrees out of phase.
[0019] The beneficial effects of this utility model are as follows: The conical conformal dipole antenna proposed in this utility model has an upper radiator, a lower radiator, and an outer edge of the mounting bracket designed to fit the conical radome in an arc shape, which meets the requirements for the overall shape of the antenna to fit the radome and can be easily mounted inside the conical radome; the dipole antenna design eliminates the need for ground contact; and it can achieve a horizontal omnidirectional radiation pattern. Attached Figure Description
[0020] Figure 1 A front view of a conical conformal dipole antenna provided in Embodiment 1 of this utility model;
[0021] Figure 2 This is a rear view of a conical conformal dipole antenna;
[0022] Figure 3 This is a side view of a conical conformal dipole antenna;
[0023] Figure 4 This is a simulation diagram of the antenna gain.
[0024] Icons: 100 - RF connector; 200 - Upper radiator; 300 - Lower radiator; 400 - Mounting bracket; 500 - Balun assembly; 510 - Balun; 520 - Shielding box; 521 - Cover plate; 530 - First feed post; 540 - Second feed post; 611 - First fixing screw; 612 - Second fixing screw; 613 - Third fixing screw; 614 - Fourth fixing screw; 615 - Fifth fixing screw; 616 - Sixth fixing screw; 617 - Seventh screw; 618 - Eighth screw; 619 - Ninth screw; 620 - Tenth screw; 621 - Eleventh screw. Detailed Implementation
[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0026] As an example, see the attached document. Figure 1 As shown, in order to solve the above-mentioned technical problems, this embodiment provides a conical conformal bipolar antenna, including an RF connector 100, an upper radiator 200, a lower radiator 300, a mounting bracket 400, and a balun assembly 500;
[0027] The RF connector 100 is fixedly connected to the input port of the balun assembly 500; the balun assembly 500 is fixedly mounted on the mounting bracket 500;
[0028] The upper radiator 200 and the lower radiator 300 are fixedly mounted on the mounting bracket 400, and the upper radiator 200 and the lower radiator 300 are located on both sides of the balun assembly 500.
[0029] Both the upper radiator 200 and the lower radiator 300 are arc-shaped;
[0030] The upper radiator 200 and the lower radiator 300 are electrically connected to the output terminal of the balun assembly 500, respectively.
[0031] As an optional implementation method, as shown in the appendix Figure 2 As shown, the balun assembly 500 includes a balun 510, a first feed post 530, a second feed post 540, and a shielding box 520; the first output terminal of the balun 510 is electrically connected to the upper radiator 200 through the first feed post 530; the second output terminal of the balun 510 is electrically connected to the lower radiator 300 through the second feed post 540; and the input terminal of the balun 510 is connected to the RF connector 100.
[0032] As an optional implementation method, as shown in the appendix Figure 2 As shown, a cover plate 521 is also fixedly installed on the shielding box 520; the cover plate 521 is fastened to the shielding box 520 by screws.
[0033] As an optional implementation method, as shown in the appendix Figure 1 As shown, the mounting bracket 400 is an arc shape that fits against the upper radiator 200 and the lower radiator 300; the central angle of the arc shape is any angle between 130° and 132°.
[0034] As an optional implementation, the inner radius of the upper radiator is 147mm to 147.5mm, and the outer radius is 140mm to 140.5mm; the width of the upper radiator is 20 to 22mm, and the thickness is 1mm to 1.1mm; the width of the lower radiator is 20 to 22mm, and the thickness is 1mm to 1.1mm; the angle of the upper radiator is 64.5° to 67.8°; the angle of the lower radiator is 64.5° to 67.8°; and the distance between the upper and lower radiators after installation is 9mm to 9.2mm.
[0035] In one embodiment of this utility model, the outer radius of the upper radiator and the lower radiator is 147mm, the inner radius is 140mm, the width is 20.5mm, and the central angle of the antenna arc between the end of the upper radiator away from the balun assembly and the end of the lower radiator away from the balun assembly is 130.25°.
[0036] Taking the antenna for the pod as an example, the operating frequency is 400MHz~403MHz, and the antenna is mounted flush with the rear fairing of the pod. The antenna has an input VSWR of less than 2:1 across the entire frequency band, is omnidirectional horizontally, has a gain greater than 1dBi across the entire frequency band, and a non-circularity of less than 1dB. (See attached image) Figure 4 The horizontal radiation pattern and gain of the antenna are shown.
[0037] As an optional implementation method, as shown in the appendix Figure 1 As shown, the side of the mounting bracket 400 away from the upper radiator 200 and the lower radiator 300 is arc-shaped. Both the side of the mounting bracket 400 closest to the upper radiator 200 and the lower radiator 300 and the side away from the upper radiator 200 and the lower radiator 300 are arc-shaped.
[0038] As an optional implementation, both the upper radiator and the lower radiator are conductors.
[0039] As an optional implementation, the upper radiator 200 and the lower radiator 300 are respectively fixed to the mounting bracket 400 by screws.
[0040] As attached Figure 3As shown, the RF connector 100 is fixedly connected to the input port of the balun assembly 500; the upper radiator 200 is fixed to the mounting bracket 400 by the first screw 611, the second screw 612, the third screw 613 and the fourth screw 614; the lower radiator 300 is fixed to the mounting bracket 400 by the fifth screw 615, the sixth screw 616, the seventh screw 617 and the eighth screw 618; and the balun assembly 500 is fixed to the mounting bracket 400 by the ninth screw 619, the tenth screw 620 and the eleventh screw 621.
[0041] As an alternative implementation, the two outputs of the balun component 500 are 180 degrees out of phase.
[0042] As an optional implementation, the mounting bracket is made of engineering plastic.
[0043] This utility model proposes a conical conformal dipole antenna, in which the upper radiator, lower radiator, and the outer edge of the mounting bracket are designed as arcs that fit with the conical radome, satisfying the requirement for the entire antenna to fit the shape of the radome and allowing it to be easily mounted inside the conical radome; the dipole antenna design eliminates the need for ground contact; and it can achieve a horizontal omnidirectional radiation pattern.
[0044] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A conical conformal dipole antenna, characterized in that, Includes an RF connector (100), an upper radiator (200), a lower radiator (300), a mounting bracket (400), and a balun assembly (500). The RF connector (100) is fixedly connected to the input port of the balun assembly (500); the balun assembly (500) is fixedly mounted on the mounting bracket (400); The upper radiator (200) and the lower radiator (300) are fixedly mounted on the mounting bracket (400), and the upper radiator (200) and the lower radiator (300) are located on both sides of the balun assembly (500); Both the upper radiator (200) and the lower radiator (300) are arc-shaped; The upper radiator (200) and the lower radiator (300) are electrically connected to the output terminal of the balun assembly (500), respectively.
2. The conical conformal dipole antenna according to claim 1, characterized in that, The balun assembly (500) includes a balun (510), a shielding box (520), a first feed post (530), and a second feed post (540); the first output terminal of the balun (510) is electrically connected to the upper radiator (200) through the first feed post (530); the second output terminal of the balun (510) is electrically connected to the lower radiator (300) through the second feed post (540); and the input terminal of the balun (510) is connected to the radio frequency connector (100).
3. The conical conformal dipole antenna according to claim 2, characterized in that, A cover plate (521) is also fixedly installed on the shielding box (520); the cover plate (521) is fastened to the shielding box (520) by screws.
4. The conical conformal dipole antenna according to claim 1, characterized in that, The mounting bracket (400) is an arc shape that fits against the upper radiator (200) and the lower radiator (300); the central angle of the arc shape is any angle between 130° and 132°.
5. The conical conformal dipole antenna according to claim 1, characterized in that, The inner radius of the upper radiator (200) is 147mm to 147.5mm, and the outer radius is 140mm to 140.5mm; the width of the upper radiator (200) is 20 to 22mm, and the thickness of the upper radiator (200) is 1mm to 1.1mm; the width of the lower radiator (300) is 20 to 22mm, and the thickness of the lower radiator (300) is 1mm to 1.1mm; the angle of the upper radiator (200) is 64.5° to 67.8°; the angle of the lower radiator (300) is 64.5° to 67.8°; the distance between the upper radiator (200) and the lower radiator (300) after installation is 9mm to 9.2mm.
6. The conical conformal dipole antenna according to claim 1, characterized in that, The mounting bracket (400) is curved on the side away from the upper radiator (200) and the lower radiator (300).
7. A conical conformal dipole antenna according to claim 1, characterized in that, Both the upper radiator (200) and the lower radiator (300) are conductors.
8. The conical conformal dipole antenna according to claim 1, characterized in that, The upper radiator (200) and the lower radiator (300) are respectively fixed to the mounting bracket (400) by screws.
9. A conical conformal dipole antenna according to claim 1, characterized in that, The two outputs of the balun (500) are 180 degrees out of phase.