An omnidirectional antenna

Abstract

The application provides an omnidirectional antenna, which comprises a non-radiation grounding element, a radiation antenna element and a radiation grounding element, one end of the radiation antenna element is connected with the radiation grounding element, and the other end of the radiation antenna element is connected with the non-radiation grounding element; the radiation antenna element comprises a plurality of radiation units and a connecting unit for connecting the plurality of radiation units in series, the radiation unit comprises a first inner conductor and two first outer conductors symmetrically arranged outside the first inner conductor, and the first inner conductor in each radiation unit is connected with the first outer conductor of the adjacent radiation unit through the connecting unit. The omnidirectional antenna of the application is a rod-shaped omnidirectional high-gain antenna with simple structure and excellent performance, adopts a mode of arraying metal straight strip units, can improve the working gain of the antenna, and the maximum realized gain of the antenna can reach 5.5dBi; the working frequency band of the antenna is 2.39GHz-2.49GHz.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of wireless communication antenna, and particularly relates to an omnidirectional antenna. BACKGROUND

[0002] With the continuous innovation of modern wireless communication, radar and electronic systems, the electromagnetic environment in which the terminal is located is also increasingly complex, and higher requirements are put forward for the performance of the antenna in various complex terrains and severe weather. The omnidirectional antenna has the ability to transmit and receive wireless signals in all directions of the horizontal plane, and is particularly suitable for wireless communication indoors and outdoors, and is widely used in civil and commercial fields. To ensure high-quality communication of equipment, not only the service area should be covered, but also the gain of the antenna should be as high as possible. Under the same conditions, increasing the gain of the antenna can increase the distance of electromagnetic energy propagation. Therefore, it is of great significance to study an omnidirectional high-gain antenna with outstanding performance in the field of modern communication and information systems. SUMMARY

[0003] The present application belongs to the technical field of wireless communication antenna, and particularly relates to an omnidirectional antenna.

[0004] The present application is implemented as follows: an omnidirectional antenna comprises a non-radiating grounding element, a radiating antenna element and a radiating grounding element, one end of the radiating antenna element is connected to the radiating grounding element, and the other end of the radiating antenna element is connected to the non-radiating grounding element.

[0005] The radiating antenna element comprises a plurality of radiating units and a connecting unit for connecting the plurality of radiating units in series, the radiating unit comprises a first inner conductor and two first outer conductors symmetrically arranged outside the first inner conductor, and the first inner conductor in each radiating unit is connected to the first outer conductor of the adjacent radiating unit through the connecting unit.

[0006] Preferably, the first inner conductor and the first outer conductor in each radiating unit are parallel to each other, the first inner conductor of each radiating unit is coaxial with the first inner conductor of the adjacent radiating unit, and the surface formed by the first inner conductor and the two first outer conductors of each radiating unit is perpendicular to the surface formed by the first inner conductor and the two first outer conductors of the adjacent radiating unit.

[0007] Preferably, the first inner conductor and the first outer conductor in each radiating unit are parallel to each other, the first inner conductor of each radiating unit is coaxial with the first inner conductor of the adjacent radiating unit, and the surface formed by the first inner conductor and the two first outer conductors of each radiating unit is perpendicular to the surface formed by the first inner conductor and the two first outer conductors of the adjacent radiating unit.

[0008] Preferably, the connecting unit comprises two first V-shaped connecting frames, the two first V-shaped connecting frames are opposite and perpendicular to each other, the middle bottom of the first V-shaped connecting frame is connected to the first inner conductor, and the two side extension parts of the first V-shaped connecting frame are connected to the two first outer conductors respectively.

[0009] Preferably, the connecting unit comprises two right-angled arch connecting frames, the two right-angled arch connecting frames are opposite and perpendicular to each other, the middle beam of the right-angled arch connecting frame is connected to the first inner conductor, and the two side extension beams of the right-angled arch connecting frame are connected to the two first outer conductors respectively.

[0010] Preferably, the connecting unit comprises a second V-shaped connecting frame and an S-shaped connecting frame, the S-shaped connecting frame comprises a first horizontal connecting rod, a second horizontal connecting rod, a third horizontal connecting rod, a first inclined connecting rod and a second inclined connecting rod.

[0011] One end of the first inner conductor is connected to the middle bottom of the second V-shaped connecting frame, and the other end of the second V-shaped connecting frame is connected to the two first outer conductors of the adjacent radiation unit.

[0012] The other end of the first inner conductor is connected to the middle part of the first horizontal connecting rod, the two ends of the first horizontal connecting rod are connected to one end of the first inclined connecting rod and one end of the second inclined connecting rod respectively, one end of the second horizontal connecting rod is connected to one of the first outer conductors on the other adjacent radiation unit, the other end of the second horizontal connecting rod is connected to the other end of the first inclined connecting rod, one end of the third horizontal connecting rod is connected to the other of the first outer conductors on the other adjacent radiation unit, and the other end of the third horizontal connecting rod is connected to the other end of the second inclined connecting rod.

[0013] Preferably, the length of the first inner conductor is equal to the length of the first outer conductor.

[0014] Preferably, the non-radiation grounding element comprises a second inner conductor, a second outer conductor, an insulating medium and a circular ring-shaped substrate, the second inner conductor is fixed to the center of the circular ring-shaped substrate through the insulating medium, the two second outer conductors are symmetrically connected to the periphery of the circular ring-shaped substrate with the second inner conductor as the axis, the second inner conductor is coaxial with the first inner conductor, and the second inner conductor and the second outer conductor are connected with the first outer conductor and the first inner conductor through the connecting unit.

[0015] Preferably, the radiative grounding element includes a third inner conductor, a third outer conductor, and a shorting metal rod. The middle part of the shorting metal rod is connected to the third inner conductor, and the two ends of the shorting metal rod are respectively connected to the two third outer conductors. The third inner conductor is coaxial with the first inner conductor, and the third inner conductor and the third outer conductor are alternately connected to the first outer conductor and the first inner conductor through the connecting unit.

[0016] Preferably, the second inner conductor, the second outer conductor, the third inner conductor, and the third outer conductor are all of equal length.

[0017] The beneficial effects of this invention are as follows:

[0018] The omnidirectional antenna of this scheme uses a non-radiating ground unit as the feed matching part, and interleaves the first inner conductor and the first outer conductor in the radiating unit. Both the first inner conductor and the first outer conductor are metal straight lines, which allows the current of the first inner conductor and the first outer conductor of each radiating unit to be in phase throughout the entire structure, thereby improving the antenna gain. The omnidirectional antenna of this invention is a simple structure and high-performance rod-shaped omnidirectional high-gain antenna. It adopts a metal straight line unit array, which can improve the antenna's operating gain. The maximum realized gain of the antenna can reach 5.5dBi; the antenna's operating frequency band is 2.39GHz-2.49GHz. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the omnidirectional antenna structure according to Embodiment 1 of the present invention;

[0020] Figure 2 This is a schematic cross-sectional view of the omnidirectional antenna according to Embodiment 1 of the present invention;

[0021] Figure 3 The |S| of the omnidirectional antenna in Embodiment 1 of the present invention 11 |Graph;

[0022] Figure 4 This is the H-plane radiation pattern of the omnidirectional antenna in Embodiment 1 of the present invention at 2.44 GHz;

[0023] Figure 5 This is the E-plane radiation pattern of the omnidirectional antenna in Embodiment 1 of the present invention at 2.43 GHz;

[0024] Figure 6 This is the 3D radiation pattern of the omnidirectional antenna of Embodiment 1 of the present invention at 2.43 GHz;

[0025] Figure 7 This is a partial structural diagram of the omnidirectional antenna according to Embodiment 2 of the present invention;

[0026] Figure 83D radiation pattern of the omni-directional antenna of embodiment two of the present application at 2.43GHz.

[0027] Explanation of reference signs:

[0028] 100, non-radiating ground element; 110, second inner conductor; 120, second outer conductor; 130, circular ring-shaped substrate; 140, insulating medium;

[0029] 200, radiating antenna element; 210, radiating unit; 211, first inner conductor; 212, first outer conductor; 220, connecting unit; 221, first V-shaped connecting frame; 222, right-angled arched connecting frame;

[0030] 300, radiating ground element; 310, third inner conductor; 320, third outer conductor; 330, shorting metal rod. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, further detailed description will be made to the present application in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0032] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application; the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two components. For those skilled in the art, the specific meaning of the terms in the present application can be understood according to the specific circumstances.

[0033] Generally, the return loss characteristic |S 11 |General requirement is less than-6dB, which is the normal standard, that is, the rod-shaped omni-directional high-gain antenna in the present application can normally work at 2.39GHz-2.49GHz under the condition of meeting the requirements, for horizontal omni-directional radiation, effectively improving the gain of the antenna and improving the directivity of the antenna.

[0034] Embodiment one

[0035] Referring to Figures 1-6 The omnidirectional antenna comprises a non-radiating ground element 100, a radiating antenna element 200 and a radiating ground element 300, one end of the radiating antenna element 200 is connected with the radiating ground element 300, and the other end of the radiating antenna element 200 is connected with the non-radiating ground element 100.

[0036] The radiating antenna element 200 comprises three radiating units 210 and four connecting units 220, the radiating unit 210 comprises a first inner conductor 211 and two first outer conductors 212 symmetrically arranged outside the first inner conductor 211, and the first inner conductor 211 in each radiating unit 210 is connected with the first outer conductor 212 of the adjacent radiating unit 210 through the connecting unit 220.

[0037] Specifically, the first inner conductor 211 and the first outer conductor 212 in each radiating unit 210 are parallel to each other, the first inner conductor 211 of each radiating unit 210 is coaxial with the first inner conductor 211 of the adjacent radiating unit 210, and the surface formed by the first inner conductor 211 and the two first outer conductors 212 of each radiating unit 210 is perpendicular to the surface formed by the first inner conductor 211 and the two first outer conductors 212 of the adjacent radiating unit 210. The structure of rotating 90 degrees along the axis between the radiating units 210 can make the antenna realize 360-degree omnidirectional radiation in the horizontal direction.

[0038] In the embodiment, the connecting unit 220 comprises two first V-shaped connecting frames 221, the two first V-shaped connecting frames 221 are opposite and perpendicular to each other in the opening direction, the middle bottom of the first V-shaped connecting frame 221 is connected with the first inner conductor 211, and the two side extension parts of the first V-shaped connecting frame 221 are connected with the two first outer conductors 212, respectively. It can be understood that the first V-shaped connecting frame 221 is mainly used for connecting the radiating units 210, and the inclination of the inclined connecting rod forming the V-shaped connecting frame is generally set to be greater than 40 degrees.

[0039] In the embodiment, the non-radiation grounding element 100 comprises a second inner conductor 110, a second outer conductor 120, an insulating medium 140 and a circular ring-shaped substrate 130, the second inner conductor 110 is fixed at the center of the circular ring-shaped substrate 130 through the insulating medium 140, two second outer conductors 120 are symmetrically connected to the periphery of the circular ring-shaped substrate 130 with the second inner conductor 110 as the central axis, the second inner conductor 110 is coaxial with the first inner conductor 211, and the second inner conductor 110 and the second outer conductor 120 are cross-connected with the first outer conductor 212 and the first inner conductor 211 through the connecting unit 220. The second inner conductor 110 is connected to the middle bottom of one first V-shaped connecting frame 221 to connect two first outer conductors 212, and the two second outer conductors 120 are connected to the two side extension parts of another first V-shaped connecting frame 221 to connect the first inner conductor 211. The circular ring-shaped substrate is connected with the two second outer conductors 120 as an electric connection contact, and the second inner conductor 110 is another electric connection contact.

[0040] In the embodiment, the radiation grounding element 300 comprises a third inner conductor 310, a third outer conductor 320 and a short-circuit metal rod 330, the middle part of the short-circuit metal rod 330 is connected with the third inner conductor 310, the two ends of the short-circuit metal rod 330 are respectively connected with two third outer conductors 320, the third inner conductor 310 is coaxial with the first inner conductor 211, and the third inner conductor 310 and the third outer conductor 320 are cross-connected with the first outer conductor 212 and the first inner conductor 211 through the connecting unit 220.

[0041] It should be noted that the first inner conductor 211, the first outer conductor 212, the second inner conductor 110, the second outer conductor 120, the third inner conductor 310 and the third outer conductor 320 of the present application are all square straight metal strips, wherein the length of the first inner conductor 211 is consistent with that of the first outer conductor 212, and the length of the first inner conductor 211 and the first outer conductor 212 is 1 / 2 wavelength compared with the wavelength of the center frequency of the antenna operating frequency band in free space. The lengths of the second inner conductor 110, the second outer conductor 120, the third inner conductor 310 and the third outer conductor 320 are all 1 / 4 wavelength.

[0042] It can be understood that the increase of the radiation unit 210 can improve the effect of antenna gain. The omnidirectional antenna of the present application is a rod-shaped omnidirectional high-gain antenna with simple structure and outstanding performance, which adopts the array mode of metal straight strip units, can improve the operating gain of the antenna, and the maximum realized gain of the antenna can reach 5.5dBi; the antenna operating frequency band is 2.39GHz-2.49GHz, such as Figure 3It can be seen that the omnidirectional antenna covers the 2.4GHz WIFI frequency band range. The antenna adopts the way of different surfaces between each metal straight line unit, realizes 360-degree omnidirectional uniform radiation in the horizontal direction, and the non-circularity of the antenna pattern in the working frequency band is 1dB. As shown in Figure 4 It can be seen that the antenna can realize the performance of omnidirectional coverage in the horizontal plane. As shown in Figure 5 It can be seen that the antenna realizes the effect of high gain.

[0043] Example two

[0044] Further referring to Figure 7 Different from example one, the connecting unit 220 of the scheme includes two straight angle arc-shaped connecting frames 222, the opening directions of the two straight angle arc-shaped connecting frames 222 are opposite and perpendicular to each other, the middle part of the crossbeam of the straight angle arc-shaped connecting frame 222 is connected with the first inner conductor 211, and the two extending longitudinal beams of the straight angle arc-shaped connecting frame 222 are respectively connected with the two first outer conductors 212. That is, the connecting position between the first inner conductor 211 and the first outer conductor 212 is a right angle connection. As shown in Figure 8 The 3D radiation pattern of the omnidirectional antenna is shown, the structure of example two is different from that of example one in that the way of the connection is a right angle connection, and the radiation pattern and the non-circularity performance of the structure are not as good as those of example one.

[0045] Example three

[0046] Different from example one and example two, the first inner conductor 211 and the first outer conductor 212 in each radiation unit 210 are parallel to each other, the first inner conductor 211 of each radiation unit 210 is coaxial with the first inner conductor 211 of the adjacent radiation unit 210, and the two first outer conductors 212 of each radiation unit 210 are coplanar with the two first outer conductors 212 of the adjacent radiation unit 210.

[0047] The radiation units 210 are all same direction coaxial and not different surfaces, based on the design way of the radiation unit 210, the connecting unit 220 of the omnidirectional antenna includes a second V-shaped connecting frame and an S-shaped connecting frame, the S-shaped connecting frame includes a first transverse connecting rod, a second transverse connecting rod, a third transverse connecting rod, a first inclined connecting rod and a second inclined connecting rod;

[0048] One end of the first inner conductor 211 is connected with the middle bottom of the second V-shaped connecting frame, and the other end of the second V-shaped connecting frame is connected with the two first outer conductors 212 of the adjacent radiation unit 210.

[0049] The other end of the first inner conductor 211 is connected to the middle of the first horizontal connecting rod, the two ends of the first horizontal connecting rod are respectively connected to one end of the first inclined connecting rod and one end of the second inclined connecting rod, one end of the second horizontal connecting rod is connected to one first outer conductor 212 on another adjacent radiating unit 210, the other end of the second horizontal connecting rod is connected to the other end of the first inclined connecting rod, one end of the third horizontal connecting rod is connected to the other first outer conductor 212 on another adjacent radiating unit 210, and the other end of the third horizontal connecting rod is connected to the other end of the second inclined connecting rod.

[0050] The above merely provides the preferred embodiments of the present application, but is not intended to limit the present application, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An omnidirectional antenna, characterized in that, It includes a non-radiating grounding element, a radiating antenna element, and a radiating grounding element, wherein one end of the radiating antenna element is connected to the radiating grounding element, and the other end of the radiating antenna element is connected to the non-radiating grounding element; The radiating antenna element includes a plurality of radiating elements and a connecting unit for connecting the plurality of radiating elements in series. Each radiating element includes a first inner conductor and two first outer conductors symmetrically disposed outside the first inner conductor. The first inner conductor in each radiating element is connected to the first outer conductor of the adjacent radiating element through the connecting unit. The first inner conductor and the first outer conductor in each of the radiating units are parallel to each other, the first inner conductor of each of the radiating units is coaxial with the first inner conductor of the adjacent radiating units, and the surface formed by the first inner conductor and the two first outer conductors of each of the radiating units is perpendicular to the surface formed by the first inner conductor and the two first outer conductors of the adjacent radiating units. The lengths of the first inner conductor and the first outer conductor are equal.

2. The omnidirectional antenna according to claim 1, characterized in that, The connection unit includes two first V-shaped connecting frames. The two first V-shaped connecting frames are opened in opposite directions and are perpendicular to each other. The bottom middle part of the first V-shaped connecting frame is connected to the first inner conductor, and the two extended parts on both sides of the first V-shaped connecting frame are respectively connected to the two first outer conductors.

3. The omnidirectional antenna according to claim 1, characterized in that, The connecting unit includes two right-angled arched connecting frames. The two right-angled arched connecting frames are opened in opposite directions and are perpendicular to each other. The middle of the crossbeam of the right-angled arched connecting frame is connected to the first inner conductor, and the two extended longitudinal beams on both sides of the right-angled arched connecting frame are respectively connected to the two first outer conductors.

4. The omnidirectional antenna according to claim 1, characterized in that, The non-radiative grounding element includes a second inner conductor, a second outer conductor, an insulating medium, and a circular substrate. The second inner conductor is fixed to the center of the circular substrate by the insulating medium. Two second outer conductors are symmetrically connected to the periphery of the circular substrate with the second inner conductor as the central axis. The second inner conductor is coaxial with the first inner conductor, and the second inner conductor and the second outer conductor are alternately connected to the first outer conductor and the first inner conductor by the connecting unit.

5. The omnidirectional antenna according to claim 4, characterized in that, The radiating grounding element includes a third inner conductor, a third outer conductor, and a shorting metal rod. The middle part of the shorting metal rod is connected to the third inner conductor, and the two ends of the shorting metal rod are respectively connected to the two third outer conductors. The third inner conductor is coaxial with the first inner conductor, and the third inner conductor and the third outer conductor are alternately connected to the first outer conductor and the first inner conductor through the connecting unit. The second inner conductor, the second outer conductor, the third inner conductor, and the third outer conductor are all of equal length.

6. An omnidirectional antenna, characterized in that, It includes a non-radiating grounding element, a radiating antenna element, and a radiating grounding element, wherein one end of the radiating antenna element is connected to the radiating grounding element, and the other end of the radiating antenna element is connected to the non-radiating grounding element; The radiating antenna element includes a plurality of radiating elements and a connecting unit for connecting the plurality of radiating elements in series. Each radiating element includes a first inner conductor and two first outer conductors symmetrically disposed outside the first inner conductor. The first inner conductor in each radiating element is connected to the first outer conductor of the adjacent radiating element through the connecting unit. The first inner conductor and the first outer conductor in each of the radiating units are parallel to each other, the first inner conductor of each of the radiating units is coaxial with the first inner conductor of the adjacent radiating units, and the two first outer conductors of each of the radiating units are coplanar with the two first outer conductors of the adjacent radiating units. The lengths of the first inner conductor and the first outer conductor are equal.

7. The omnidirectional antenna according to claim 6, characterized in that, The connecting unit includes a second V-shaped connecting frame and an S-shaped connecting frame. The S-shaped connecting frame includes a first transverse connecting rod, a second transverse connecting rod, a third transverse connecting rod, a first inclined connecting rod, and a second inclined connecting rod. One end of the first inner conductor of each of the radiating units is connected to the middle bottom of the second V-shaped connecting frame, and the other end of the second V-shaped connecting frame is connected to the two first outer conductors of adjacent radiating units; The other end of the first inner conductor of each of the radiating units is connected to the middle of the first transverse connecting rod. The two ends of the first transverse connecting rod are respectively connected to one end of the first inclined connecting rod and one end of the second inclined connecting rod. One end of the second transverse connecting rod is connected to a first outer conductor on another adjacent radiating unit. The other end of the second transverse connecting rod is connected to the other end of the first inclined connecting rod. One end of the third transverse connecting rod is connected to another first outer conductor on another adjacent radiating unit. The other end of the third transverse connecting rod is connected to the other end of the second inclined connecting rod.

8. The omnidirectional antenna according to claim 6, characterized in that, The non-radiative grounding element includes a second inner conductor, a second outer conductor, an insulating medium, and a circular substrate. The second inner conductor is fixed to the center of the circular substrate by the insulating medium. Two second outer conductors are symmetrically connected to the periphery of the circular substrate with the second inner conductor as the central axis. The second inner conductor is coaxial with the first inner conductor, and the second inner conductor and the second outer conductor are alternately connected to the first outer conductor and the first inner conductor by the connecting unit.

9. The omnidirectional antenna according to claim 8, characterized in that, The radiating grounding element includes a third inner conductor, a third outer conductor, and a shorting metal rod. The middle part of the shorting metal rod is connected to the third inner conductor, and the two ends of the shorting metal rod are respectively connected to the two third outer conductors. The third inner conductor is coaxial with the first inner conductor, and the third inner conductor and the third outer conductor are alternately connected to the first outer conductor and the first inner conductor through the connecting unit. The second inner conductor, the second outer conductor, the third inner conductor, and the third outer conductor are all of equal length.

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