WO2015018313A1

WO2015018313A1 - Antenna

Info

Publication number: WO2015018313A1
Application number: PCT/CN2014/083702
Authority: WO
Inventors: Yihong Qi; Wei Yu
Original assignee: Jiangsu Enice Network Information Co., Ltd.
Priority date: 2013-08-05
Filing date: 2014-08-05
Publication date: 2015-02-12

Abstract

An antenna, includes a base plate (100); a radiating element (200); a feeder (300) connected with the radiating element (200); and a connecting element (400) directly connected with the radiating element (200) and coupled with the base plate (100).

Description

ANTENNA

CROSS REFERENCE TO RELATED APPLICATIONS This application claims priority and benefits of Chinese Patent Applications No.

201310338074.1 and No. 201320474021.8, filed with State Intellectual Property Office on August 5, 2013, the entire contents of which are incorporated herein by reference.

FIELD

Embodiments of the present disclosure generally relate to an antenna.

BACKGROUND ART

Mental components of a conventional antenna are connected one another directly, however, in a manufacturing practice of the antenna, it is difficult to ensure the contact surfaces between the mental components in an ideal condition, in other words, the contact surface of each mental component cannot be guaranteed to be absolutely flat, resulting in the contact surfaces between the mental components connected to each other cannot be contacted completely. Thus, the conventional antenna generally generates a passive intermodulation due to the incomplete contact between the mental components.

SUMMARY

Embodiments of the present invention seek to solve at least one of the problems existing in the related art to at least some extent.

Embodiments of the present invention provide an antenna, includes a base plate; a radiating element; a feeder connected with the radiating element; and a connecting element directly connected with the radiating element and coupled with the base plate.

In some embodiments, the antenna further includes an insulating element disposed between the connecting element and the base plate.

In some embodiments, the insulating element is connected with each one of the connecting element and the base plate. In some embodiments, the insulating element is a non-metal gasket, an insulating varnish layer or a plastic film.

In some embodiments, the radiating element comprises a center part and a plurality of radiating parts, each of the plurality of the radiating parts defines a first end connected with the center part and a second end extended away from the center part.

In some embodiments, the antenna includes a plurality of the connecting elements, each of the plurality of the connecting elements is connected with a corresponding one of the plurality of the radiating parts directly.

In some embodiments, the feeder is configured as a coaxial cable comprising an outer conductor connected with the base plate and an inner disposed within the outer conductor, the inner conductor is extended through the base plate and connected with the center part.

In some embodiments, each of the radiating parts is configured as a sheet structure.

In some embodiments, angles between adjacent the radiating parts are equal.

In some embodiments, the connecting element includes: an inclined portion defining an upper end directly connected with the radiating element and a lower end; a vertical portion defining an upper end connected with the lower end of the inclined portion and a lower end; and a horizon portion connected with the lower end of the vertical portion and coupled with the base plate.

In some embodiments, the outer conductor is capacitively coupled with the base plate.

With the coupling connection between the connecting element 400 and the base plate 100, the antenna 10 can have a good electrical performance and meet a broadband requirement of the antenna, and a possibility of passive intermodulation of the antenna is also reduced.

BRIEF DESCRIPTION OF THE DRAWINGS

These and other aspects and advantages of embodiments of the present disclosure will become apparent and more readily appreciated from the following descriptions made with reference the accompanying drawings, in which:

Fig. 1 is a perspective view showing an antenna according to an embodiment of the present invention; Fig. 2 is a partially enlarged view showing Circle B in Fig. 1.

DETAILED DESCRIPTION

In order to make the problem to be solved, the technical proposal and the beneficial effects of the present invention move transparent, detailed descriptions of the present invention will be made combined with attached drawings and embodiments. It should be understood that specific embodiments described herein are just used to illustrate the present invention, and not to limit the present invention.

Reference will be made in detail to embodiments of the present disclosure. The same or similar elements and the elements having same or similar functions are denoted by like reference numerals throughout the descriptions. The embodiments described herein with reference to drawings are explanatory, illustrative, and used to generally understand the present disclosure. The embodiments shall not be construed to limit the present disclosure.

In the specification, unless specified or limited otherwise, relative terms such as "central", "longitudinal", "lateral", "front", "rear", "right", "left", "inner", "outer", "lower", "upper", "horizontal", "vertical", "above", "below", "up", "top", "bottom" ,"inner", "outer", "clockwise", "anticlockwise" as well as derivative thereof (e.g., "horizontally", "downwardly", "upwardly", etc.) should be construed to refer to the orientation as then described or as shown in the drawings under discussion. These relative terms are for convenience of description and do not require that the present disclosure be constructed or operated in a particular orientation. In addition, terms such as "first" and "second" are used herein for purposes of description and are not intended to indicate or imply relative importance or significance.

In the description of the present disclosure, unless specified or limited otherwise, it should be noted that, terms "mounted," "connected" "coupled" and "fastened" may be understood broadly, such as permanent connection or detachable connection, electronic connection or mechanical connection, direct connection or indirect connection via intermediary, inner communication or interreaction between two elements. These having ordinary skills in the art should understand the specific meanings in the present disclosure according to specific situations.

After deeply studding and researching, inventors found out the reason of passive intermodulation generated by the antenna. Mental components of a conventional antenna are connected with one another directly, however, in a manufacturing practice of the antenna, it is difficult to ensure the contact surfaces between the mental components in an ideal condition, in other words, the contact surface of each mental component cannot be guaranteed to be absolutely flat, resulting in the contact surfaces between the mental components connected to each other cannot be contacted completely. Thus, the conventional antenna inevitably generates a passive intermodulation due to the incomplete contact between the mental components.

An antenna according to embodiments of the present invention will be described reference to Figs 1 and 2.

As shown in Fig. 1 and Fig. 2, the antenna 10 according to embodiments of the present invention includes a base plate 100, a radiating element 200, a feeder 300 and a connecting element 400.

The feeder 300 is connected with the radiating element 200, and the connecting element 400 is directly connected with the radiating element 200 and coupled with the base plate 100.

With the coupling connection between the connecting element 400 and the base plate 100, the antenna 10 can have a good electrical performance and meet a broadband requirement of the antenna (i.e. a working broadband is at least from 796MHz to 960MHz and from 1710MHz to 2700MHz), and a possibility of passive intermodulation generated by the antenna is also reduced.

Specifically, the antenna 10 according to embodiments of the present invention may be configured as a vertically polarized omni-directional antenna. The connecting element 400 is capacitively coupled with the base plate 100, and the radiating element 200 is disposed above the base plate 100.

The base plate 100 is a metal base plate, i.e. the base plate 100 is made of metal. As shown in Fig. 1 and Fig. 2, the base plate 100 may be configured as a sheet structure. An upper surface of the base plate 100 may be configured as a plane, and the connecting element 400 may be coupled to the upper surface of the base plate 100. The base plate 100 may be in shape of circular, regular polygon or irregular polygon.

Moreover, the base plate 100 may be configured as a substantially cylindrical structure and define an accommodating cavity having an open lower end, so that a part of the second feeder

300 may be received into the accommodating cavity.

As shown in Fig. 2, in some embodiments, the antenna 10 may includes an insulating element 500 disposed between the connecting element 400 and the base plate 100, in other words, with disposing the insulating element 500, the coupling connection between the connecting element 400 and the base plate 100 can be achieved. Thus, the antenna 10 has a simple and suitable structure and generates less passive intermodulation.

An area of coupling connection between the connecting element 400 and the base plate 100 is adjustable and determined according to a performance of the antenna 10, such that the antenna 10 can have a sufficient capacitance under a desired frequency.

As shown in Fig. 2, in some embodiments, the insulating element 500 may be connected with both the connecting element 400 and the base plate 100, in other words, the insulating element 500 may be contacted with each one of the connecting element 400 and the base plate 100. Thus reducing the manufacturing difficulty of the antenna 10 and ensuring the structure of the antenna 10 more stable.

More particularly, the insulating element 500 may be disposed on the upper surface of the base plate 100, and the connecting element 400 may be disposed on the upper surface of the insulating element 500.

The insulating element 500 may configured as a non-metal gasket, an insulating varnish layer or a plastic film.

The radiating element 200 is a metal radiating element, i.e. is made of metal, and the connecting element 400 is a metal connecting element, i.e. is made of metal.

As shown in Fig. 1, in some embodiments, the second radiating element 200 may includes a center portion 210 and a plurality of radiating portions 220, each of the plurality of the radiating portions 220 defines a first end connected with the center portion 210 and a second end extended away from the center portion 210.

The vertically polarized ceiling omni-directional antenna in the art is configured as a discone antenna, i.e. the radiating element of the vertically polarized ceiling omni-directional antenna in the art has a shape of cone. Therefore, this kind of the radiating element is required to be processed by a stamping process of metal stretch forming which has some disadvantages, such like a complex mould and an expensive manufacturing cost.

With the center portion 210 and the plurality of radiating portions 220, a structure designing of the radiating element 200 can be simplified and a processing technology of the radiating element 200 is improved, thus reducing the processing difficulty and manufacturing cost of the radiating element 200.

Advantageously, as shown in Fig. 1, each of the radiating portions 220 may be configured as a sheet structure, thus further reducing the processing difficulty and manufacturing cost of the radiating element 200.

A main surface of each radiating portion 220, i. e. the surface of each radiating portion 220 with the largest area, may be flat or curved. Each radiating portion 220 may be in shape of regular polygon (such like rectangle) or irregular polygon. Each radiating portion 220 may be perpendicular to the base plate 100, more particularly, the main surface of the each radiating portion 220 may be perpendicular to the upper surface of the base plate 100.

The shape, structure and size of each radiating portion 220 may be identical or different.

As shown in Fig. 1, angles formed between adjacent radiating portions 220 may be equal, in other words, the angles formed between adjacent radiating portions 220 is a predetermined angle, and the radiating portions 220 can be arranged at regular intervals along a circumference direction of the center portion 210, such that the radiations in different directions can be equal. Thus satisfying a need of the radiation out-of-roundness of the omni-directional antenna and improving the radiating performance of the omni-directional antenna.

For example, three radiating portions 220 may be arranged and the angle between the adjacent radiating portions 220 is 120° , as shown in Fig. 1.

As shown in Fig. 1, a plurality of the connecting elements 400 may be directly connected with the radiating portions 220 in manner of one to one, in other words, a number of the connecting elements 400 is equal to that of the radiating portions 220, and one connecting element 400 is connected with one corresponding radiating portion 220. Thus, the stability of the antenna 10 can be increased.

The feeder 300 may be configured as a coaxial cable, and the coaxial cable includes an outer conductor and an inner conductor disposed within the outer conductor. The outer conductor is connected with the base plate 100, and the inner conductor is connected with the center portion 210 by passing through the base plate 100. More particularly, the inner conductor may pass through a center of the base plate 100.

The outer conductor is capacitively coupled with the base plate 100. Thus, the electrical performance of the antenna 10 is further increased, the broadband requirement of the antenna 10 is met and the possibility of passive intermodulation of the antenna is reduced.

Advantageously, an insulating member may be disposed between the outer conductor and the base plate 100 and connected with both of the outer conductor and the base plate 100. The insulating member may be a non-metal gasket, an insulating varnish layer or a plastic film.

As shown in Fig. 1 and Fig. 2, in some embodiments, the connecting element 400 includes an inclined portion 410, a vertical portion 420 and a horizon portion 430. An upper end of the inclined portion 410 is directly connected with the radiating element 200, an upper end of the vertical portion 420 is connected with a lower end of the inclined portion 410, the horizon portion 430 is connected with a lower end of the vertical portion 420 and coupled with the base plate 100. That is, the vertical portion 420 is extended in a vertical direction (up-down directions as Arrow A indicated in Fig. 1 and Fig. 2), and the horizon portion 430 is extended in a horizon direction. Thus, the connecting element 400 has a simple and suitable structure.

The insulating element 500 may be disposed on the upper surface of the base plate 100, and the horizon portion 430 may be disposed an upper surface of the insulating element 500.

Each of the inclined portion 410, vertical portion 420 and the horizon portion 430 may be configured as a sheet structure, i.e. may be in shape of sheet.

A main surface of each inclined portion 410, i.e. the surface of each inclined portion 410 with the largest area, may be flat or curved. A main surface of each vertical portion 420, i.e. the surface of each vertical portion 420 with the largest area, may be flat or curved. A main surface of each horizon portion 430, i.e. the surface of each horizon portion 430 with the largest area, may be flat or curved.

The connecting element 400 may be a metal element, i.e. the connecting element 400 may be made of metal. Advantageously, the inclined portion 410, vertical portion 420 and the horizon portion 430 may be formed integrally.

Reference throughout this specification to "an embodiment," "some embodiments," "one embodiment", "another example," "an example," "a specific example," or "some examples," means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. Thus, the appearances of the phrases such as "in some embodiments," "in one embodiment", "in an embodiment", "in another example," "in an example," "in a specific example," or "in some examples," in various places throughout this specification are not necessarily referring to the same embodiment or example of the present invention. Furthermore, the particular features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

Although explanatory embodiments have been shown and described, it would be appreciated by those skilled in the art that the above embodiments cannot be construed to limit the present invention, and changes, alternatives, and modifications can be made in the embodiments without departing from spirit, principles and scope of the present invention.

Claims

WHAT IS CLAIMED IS:

1. An antenna, comprising:

a base plate;

a radiating element;

a feeder connected with the radiating element; and

a connecting element directly connected with the radiating element and coupled with the base plate.

2. The antenna of claims 1, wherein further comprises an insulating element disposed between the connecting element and the base plate.

3. The antenna of claim 2, wherein the insulating element is connected with each one of the connecting element and the base plate.

4. The antenna of claim 2 or 3, wherein the insulating element is a non-metal gasket, an insulating varnish layer or a plastic film.

5. The antenna of any one of claims 1-4, wherein the radiating element comprises a center part and a plurality of radiating parts, each of the plurality of the radiating parts defines a first end connected with the center part and a second end extended away from the center part.

6. The antenna of claim 5, comprising a plurality of the connecting elements, each of the plurality of the connecting elements is connected with a corresponding one of the plurality of the radiating parts directly.

7. The antenna of claim 5 or 6, wherein the feeder is configured as a coaxial cable comprising an outer conductor connected with the base plate and an inner disposed within the outer conductor, the inner conductor is extended through the base plate and connected with the center part.

8. The antenna of any one of claims 5-7, wherein each of the radiating parts is configured as a sheet structure.

9. The antenna of any one of claims 5-8, wherein angles between adjacent the radiating parts are equal.

10. The antenna of any one of claims 1-9, wherein the connecting element comprises:

an inclined portion defining an upper end directly connected with the radiating element and a lower end;

a vertical portion defining an upper end connected with the lower end of the inclined portion and a lower end; and

a horizon portion connected with the lower end of the vertical portion and coupled with the base plate.

11. The antenna of claim 7, wherein the outer conductor is capacitively coupled with the base plate.