Broadband folded dipole

Abstract

The invention provides a broadband folded dipole, which comprises a reflecting plate, a radiation plate, a feeder line for feeding the radiation plate, a first radiation line, a second radiation line, a comb-shaped circuit and a feed balun, the first radiation lines and the second radiation lines are respectively arranged on the first surface of the radiation plate in pairs, and the first radiation lines and the second radiation lines are distributed at the edge of the radiation plate at intervals; the comb-shaped circuit is fixedly arranged on the surface of the radiant panel, and two ends of the comb-shaped circuit are respectively connected with one first radiation line or one second radiation line; one end of the feed balun is fixedly connected with the radiation plate, and the other end of the feed balun is fixedly connected with the reflection plate. According to the invention, the equivalent electrical length of the first radiation line and the second radiation line is increased through the comb-shaped circuit, so that the miniaturization of the whole broadband oscillator is realized.

Description

Technical Field

[0001] The invention belongs to the technical field of base station antennas, and in particular relates to a broadband folded oscillator. Background Art

[0002] With the rapid development of mobile communication technology, the integration and complexity of base station antennas are getting higher and higher. At present, half-wave oscillators are often used as antenna oscillators to design antennas. As the antenna bandwidth increases, the antenna oscillator diameter increases, the standing wave is high, the cross polarization is poor, and the 3dB beam width is not converged enough. How to reduce the size of the oscillator has become the key to realizing a miniaturized antenna array. Summary of the invention

[0003] In order to solve the problem of how to realize a miniaturized antenna array described in the background technology, the present invention proposes the following technical solution:

[0004] A broadband folded oscillator comprises a reflecting plate, a radiating plate and a feeder for feeding the radiating plate, and also comprises: a first radiating line, a second radiating line, a comb line and a feeding balun; the first radiating line and the second radiating line are respectively arranged in pairs on the first surface of the radiating plate, and each of the first radiating line and the second radiating line is distributed at intervals on the edge of the radiating plate; the comb line is fixedly arranged on the surface of the radiating plate, and the two ends of the comb line are respectively connected to one of the first radiating line or one of the second radiating line; one end of the feeding balun is fixedly connected to the radiating plate, and the other end of the feeding balun is fixedly connected to the reflecting plate.

[0005] The comb-shaped line includes a first section and a second section which are vertically connected; two ends of the first section are respectively vertically connected to the middle of each of the first radiating lines, and two ends of the second section are respectively vertically connected to the middle of each of the second radiating lines.

[0006] Furthermore, the first section and the second section are both provided with stepped circuits, and the first section is symmetrical with respect to the second section, and the second section is symmetrical with respect to the first section.

[0007] Furthermore, the first section and the second section are both provided with stepped circuits, and the first section is symmetrical with respect to the second section, and the second section is symmetrical with respect to the first section.

[0008] Furthermore, each of the radiation panels is provided with a chamfered line, and each of the chamfered lines extends along a diagonal line of the radiation area.

[0009] Furthermore, the feeding balun includes: a first part and a second part; one end of the first part is fixedly connected to the reflector, the other end of the first part is embedded in the second part, and one end of the second part passes through the radiation plate and is fixedly connected to the radiation plate.

[0010] Furthermore, the extending directions of adjacent chamfered lines are perpendicular to each other.

[0011] Furthermore, a ring circuit and a plurality of coupling lines are provided on the second surface of the radiation plate, the ring circuit is located at the edge of the second surface of the radiation plate, each of the coupling lines is arranged in the ring circuit, and the extension direction of each coupling line is perpendicular to the extension direction of the chamfered circuit at the corresponding position.

[0012] Furthermore, each of the first radiating lines is parallel to each other, and the surface of each of the first radiating lines is spaced apart and protruded to form a first step circuit; each of the second radiating lines is parallel to each other, and the surface of each of the second radiating lines is spaced apart and protruded to form a second step circuit.

[0013] Beneficial effects: The present invention increases the equivalent electrical length of the first radiating line and the second radiating line through the comb-shaped circuit, thereby realizing the miniaturization of the entire broadband oscillator. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a broadband folded oscillator according to an embodiment of the present invention;

[0015] Figure 2 is a structural schematic diagram of a first surface of a radiation plate according to an embodiment of the present invention;

[0016] Figure 3 is a schematic structural diagram of a second surface of a radiation plate according to an embodiment of the present invention;

[0017] Figure 4 A standing wave simulation diagram of a broadband folded oscillator according to an embodiment of the present invention;

[0018] Figure 5 This is a simulation diagram of the isolation of a broadband folded vibrator according to an embodiment of the present invention;

[0019] Figure 6 A +45° polarization radiation pattern of a broadband folded vibrator according to an embodiment of the present invention;

[0020] Figure 7 The -45° polarization radiation pattern of a broadband folded oscillator according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0022] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0023] Figure 1 The figure is a schematic structural diagram of a broadband folded oscillator according to an embodiment of the present invention.

[0024] Reference Figure 1 , a broadband folded oscillator according to an embodiment of the present invention includes: a reflector 1, a radiation plate 2 and a feeder for feeding the radiation plate 2. In addition, a broadband folded oscillator according to an embodiment of the present invention also includes: a first radiation line 3, a second radiation line 4, a comb line 5 and a feeding balun 6. The first radiation line 3 and the second radiation line 4 are respectively arranged in pairs on the first surface of the radiation plate 2, and each of the first radiation line 3 and the second radiation line 4 is distributed at intervals on the edge of the radiation plate 2. The comb line 5 is fixedly arranged on the surface of the radiation plate 2, and the two ends of the comb line 5 are respectively connected to a first radiation line 3 or a second radiation line 4. One end of the feeding balun 6 is fixedly connected to the radiation plate 2, and the other end of the feeding balun 6 is fixedly connected to the reflector 1.

[0025] Figure 2 Schematic diagram of the structure of a first surface of a radiation plate according to an embodiment of the present invention.

[0026] Reference Figure 2 Specifically, the comb-shaped line 5 includes a first section 51 and a second section 52 which are vertically connected. The two ends of the first section 51 are respectively connected to the middle of each first radiant line 3, and the connecting end of the second section 52 is respectively connected to the middle of each second radiant line 4, so that the first surface of the entire radiation board 2 is divided into multiple radiation areas. The surface of the first section 51 and the surface of the second section 52 are both provided with stepped lines, and the first section 51 and the second section 52 are mutually midlines. In this embodiment, the first radiant line 3 and the second radiant line 4 are respectively distributed at the edge of the first surface of the radiation board 2, and each radiation area is an equal square area.

[0027] Specifically, a chamfered line 21 is provided in each radiation panel region, and each chamfered line 21 extends along one of the diagonals of the corresponding radiation region, and the extension directions of the chamfered lines 21 in adjacent radiation regions are perpendicular to each other. Each chamfered line 21 has the same shape, and each chamfered line 21 is symmetrical about one of the diagonals in the corresponding radiation region. In this embodiment, the extension directions of the chamfered lines 21 in the diagonal radiation regions are collinear, and the extension directions of the chamfered lines 21 in the radiation regions of adjacent diagonals are perpendicular to each other.

[0028] In order to further increase the equivalent electrical length of the first radiation line 3 and the second radiation line 4, the surface of each first radiation line 3 is spaced apart and raised to form a first step line 31, and the surface of each second radiation line 4 is spaced apart and raised to form a second step line 41. The first radiation lines 3 are parallel to each other, and the second radiation lines 4 are parallel to each other. The length of the first step line 31 gradually decreases from the middle of the first radiation line 3 to the two ends of the first radiation line 3, and the first step lines 31 are symmetrical about the second section 52. The length of the second step line 41 gradually decreases from the middle of the second radiation line 4 to the two ends of the second radiation line 4, and the second step lines 41 are symmetrical about the first section 51.

[0029] Figure 3 FIG. 4 is a schematic structural diagram of a second surface of a radiation plate according to an embodiment of the present invention. Figure 4 The figure is a standing wave simulation diagram of a broadband folded oscillator according to an embodiment of the present invention. Figure 5 This is a simulation diagram of the isolation of a broadband folded oscillator according to an embodiment of the present invention. Figure 6 The figure is a +45° polarization radiation pattern of a broadband folded oscillator according to an embodiment of the present invention. Figure 7 The -45° polarization radiation pattern of a broadband folded oscillator according to an embodiment of the present invention.

[0030] Reference Figure 3 , a ring line 22 and a plurality of coupling lines 23 are respectively provided on the second surface of the radiation plate 2. The ring line 22 is located at the edge of the second surface of the radiation plate 2. The number of coupling lines 23 is equal to the number of radiation areas. Each coupling line 23 is located in the ring line 22, and the extension direction of each coupling line 23 is perpendicular to the extension direction of the chamfered line 21 in the corresponding radiation area. Under the action of the coupling line 23, the matching of the entire broadband oscillator is further optimized. Figure 4 and Figure 5 It can be seen that the standing wave simulation value of the broadband folded oscillator of this embodiment is less than 1.5, and the isolation simulation value is less than -25dB, and the indicators are good. Figure 6 and Figure 7 It can be seen that the radiation pattern of the broadband folded oscillator of this embodiment converges.

[0031] The feed balun 6 includes a first part 61 and a second part 62, one end of the first part 61 is fixedly connected to the reflector 1, and the other end of the first part 61 is embedded in the second part 62. One end of the second part 62 passes through the surface of the radiation plate 2 and is fixedly connected to the radiation plate 2, and the fixed connection includes but is not limited to electrical connections such as welding. The surface of the first part 61 and the surface of the second part 62 are both provided with a feed network connected to the feed line.

[0032] In summary, the present invention increases the equivalent electrical length of the first radiation line and the second radiation line through the comb-shaped line, thereby realizing the miniaturization of the entire broadband oscillator. Furthermore, the multiple coupling lines arranged in the second surface further optimize the matching of the entire broadband oscillator.

[0033] The foregoing describes certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0034] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0035] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0036] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A broadband folded oscillator, comprising a reflector (1), a radiation plate (2) and a feeder for feeding the radiation plate (2), characterized in that: The radiation board also includes: a first radiation line (3), a second radiation line (4), a comb line (5) and a feeding balun (6); the first radiation line (3) and the second radiation line (4) are respectively arranged in pairs on the first surface of the radiation board (2), and each of the first radiation line (3) and the second radiation line (4) is distributed at intervals on the edge of the radiation board (2); the comb line (5) is fixedly arranged on the surface of the radiation board (2), and the two ends of the comb line (5) are respectively connected to one of the first radiation line (3) or one of the second radiation line (4); one end of the feeding balun (6) is fixedly connected to the radiation board (2), and the other end of the feeding balun (6) is fixedly connected to the reflection board (1).

2. A broadband folded oscillator according to claim 1, characterized in that: The comb-shaped line (5) comprises a first section (51) and a second section (52) which are vertically connected; the two ends of the first section (51) are respectively vertically connected to the middle of each of the first radiating lines (3), and the two ends of the second section (52) are respectively vertically connected to the middle of each of the second radiating lines (4).

3. A broadband folded oscillator according to claim 2, characterized in that: The first section (51) and the second section (52) are both provided with stepped lines, and the first section (51) is symmetrical with respect to the second section (52), and the second section (52) is symmetrical with respect to the first section (51).

4. A broadband folded oscillator according to claim 2, characterized in that: Each of the radiation plates is provided with a chamfered line (21), and each of the chamfered lines (21) extends along a diagonal line of the radiation area.

5. A broadband folded oscillator according to claim 2, characterized in that: The feeding balun (6) comprises: a first part (61) and a second part (62); one end of the first part (61) is fixedly connected to the reflection plate (1), the other end of the first part (61) is embedded in the second part (62), and one end of the second part (62) passes through the radiation plate (2) and is fixedly connected to the radiation plate (2).

6. A broadband folded oscillator according to claim 4, characterized in that: The extending directions of adjacent chamfered lines (21) are perpendicular to each other.

7. A broadband folded oscillator according to claim 6, characterized in that: The second surface of the radiation plate (2) is provided with a ring circuit (22) and a plurality of coupling lines (23); the ring circuit (22) is located at the edge of the second surface of the radiation plate (2); each coupling line (23) is arranged in the ring circuit (22); and the extension direction of each coupling line (23) is perpendicular to the extension direction of the chamfered circuit (21) at the corresponding position.

8. A broadband folded oscillator according to claim 2, characterized in that: Each of the first radiating lines (3) is parallel to one another, and the surface of each of the first radiating lines (3) is spaced apart and raised to form a first stepped circuit (31); each of the second radiating lines (4) is parallel to one another, and the surface of each of the second radiating lines (4) is spaced apart and raised to form a second stepped circuit (41).

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