阅读说明：本技术 一种超宽带小型化全向鞭状天线 (Miniaturized omnidirectional whip antenna with ultra wide band ) 是由 王灿 魏耀德 梅艳伟 于 2020-05-13 设计创作，主要内容包括：本发明公开了一种超宽带小型化全向鞭状天线,包括工程塑料管套和防尘帽,所述工程塑料管套内从上到下依次设有钢缆、PCB板、射频连接器,所述PCB板焊接有同轴线和对应的绕线线圈,本发明采用了一种增加全向天线带宽的方法,通过加载匹配元件,分为集总加载和分布加载两大类,集总加载主要是加载LC匹配电路和传输线变换器,分布加载是将天线分成好多段,然后用匹配电路连接,通过加载匹配电路使天线上的电流均匀分布,从而实现天线的宽带阻抗匹配,本发明为VHF/UHF超宽带单极子天线,通过天线集总加载LC匹配电路后天线工作带宽大大增加,且体积较小,能够满足宽频带、便携性的需求。(The invention discloses an ultra-wideband miniaturized omnidirectional whip antenna, which comprises an engineering plastic pipe sleeve and a dustproof cap, wherein a steel cable, a PCB (printed Circuit Board) and a radio frequency connector are sequentially arranged in the engineering plastic pipe sleeve from top to bottom, a coaxial line and a corresponding winding coil are welded on the PCB, the method for increasing the bandwidth of the omnidirectional antenna is adopted, the method is divided into two categories of lumped loading and distributed loading through loading a matching element, the lumped loading mainly comprises loading a L C matching circuit and a transmission line converter, the distributed loading is to divide the antenna into a plurality of sections, then the sections are connected by using a matching circuit, and the current on the antenna is uniformly distributed by loading the matching circuit, so that the broadband impedance matching of the antenna is realized.)

1. An ultra-wideband miniaturized omni-directional whip antenna, characterized in that: the anti-dust device comprises an engineering plastic pipe sleeve and a dust cap, wherein a steel cable, a PCB (printed circuit board) and a radio frequency connector are sequentially arranged in the engineering plastic pipe sleeve from top to bottom, and the PCB is welded with a coaxial line and a corresponding winding coil.

2. A miniaturized omni-directional whip antenna according to claim 1, wherein the coaxial lines comprise a first coaxial line, a second coaxial line, and a third coaxial line; the winding coil includes a first winding coil, a second winding coil, and a third winding coil.

3. An ultra-wideband miniaturized omni-directional whip antenna as claimed in claim 2, wherein the PCB board has a first coaxial line and a second coaxial line welded to a front surface thereof and a third coaxial line welded to a back surface thereof, wherein the first coaxial line, the second coaxial line and the third coaxial line and the first winding coil, the second winding coil and the third winding coil constitute an L C circuit loaded on the antenna.

4. A miniaturized omni-directional whip antenna of claim 2, wherein a length of the coaxial line is adjustable; the coil number of turns of the winding coil is adjustable.

5. An ultra-wideband miniaturized omni-directional whip antenna according to claim 2, wherein the wire rope is freely bendable and resettable.

Technical Field

The invention relates to the field of electronic communication, in particular to an ultra-wideband miniaturized omnidirectional whip antenna.

Background

With the development of scientific technology, various devices in electronic communication systems are required to be miniaturized and integrated, and antennas, which are indispensable components in communication systems, are also required to be miniaturized and portable. At present, a device may need to receive signals of multiple frequency bands, and if several antennas are installed at the same time, the size and weight of the device are increased, and high requirements are also imposed on the isolation between the antennas. Therefore, it has become a demand that one antenna can receive signals of several frequency bands at the same time, and broadband and ultra-wideband antennas can well solve the problem.

In the published results, the research of broadband antennas at home and abroad has achieved a lot of results, and the bandwidth broadening method of the broadband omnidirectional antenna mainly comprises the following steps: changing the shape of the antenna, for example, the upper and lower radiators of a dipole antenna are changed into cones in the biconical antenna; or a discone antenna, a deformed bicone antenna, in which half of the bicone antenna is replaced by a disc, and in addition, the bandwidth of the antenna can be widened by increasing the diameter of the antenna.

The above two structures are complicated and have high manufacturing cost, and in addition, the operating bandwidth cannot meet the requirement of larger bandwidth. In addition, the two methods for widening the bandwidth of the antenna are both at the cost of sacrificing the size of the antenna, and have great limitation in some occasions requiring the miniaturization of the antenna.

Disclosure of Invention

Aiming at the problems, the invention aims to provide an ultra-wideband miniaturized omni-directional whip antenna, and adopts a method for increasing the bandwidth of the omni-directional antenna in order to solve the problems of narrow bandwidth and large size of the prior art, wherein a matching element is loaded to be divided into two categories of lumped loading and distributed loading, the lumped loading mainly comprises loading of an L C matching circuit and a transmission line converter, the distributed loading is to divide the antenna into a plurality of sections, then the sections are connected by using the matching circuit, and the current on the antenna is uniformly distributed by loading the matching circuit, so that the broadband impedance matching of the antenna is realized.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a miniaturized qxcomm technology of ultra wide band whip form antenna, includes engineering plastics pipe box and dust cap, from the top down is equipped with steel cable, PCB board, radio frequency connector in proper order in the engineering plastics pipe box, the welding of PCB board has coaxial line and the wire winding coil who corresponds.

Preferably, the coaxial lines include a first coaxial line, a second coaxial line and a third coaxial line; the winding coil includes a first winding coil, a second winding coil, and a third winding coil.

Preferably, the front surface of the PCB is welded with a first coaxial line and a second coaxial line, the back surface of the PCB is welded with a third coaxial line, and the first coaxial line, the second coaxial line, the third coaxial line, the first winding coil, the second winding coil and the third winding coil form an L C circuit loaded to the antenna.

Preferably, the length of the coaxial line is adjustable; the coil number of turns of the winding coil is adjustable.

Preferably, the steel cable can be freely bent and reset.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention has adopted a method for increasing the bandwidth of omnidirectional antenna, through loading the matching element, divide into lumped loading and distributing and load two kinds, lumped loading is mainly to load L C matching circuit and transmission line converter, distribute and load and divide the aerial into the good multistage, then connect with matching circuit, make the electric current on the aerial distribute evenly through loading the matching circuit, thus realize the impedance match of broadband of the aerial, the invention is a VHF/UHF ultra wide band monopole antenna, load L C matching circuit greatly increase the working bandwidth of the aerial after through the aerial is lumped, and the volume is smaller, can meet the broadband, demand of the portability.

2. After the L C matching circuit is loaded, the working bandwidth of the antenna is obviously improved, the standing-wave ratio of less than 3.5 can be met in the VHF/UHF part frequency band, the broadband requirement is realized, the size is reduced, and the miniaturization requirement is realized.

3. The smith chart of the antenna after matching is shown in fig. 5, the frequency points are densely distributed and distributed around the central matching point, and the impedance of the antenna is well distributed.

Drawings

Fig. 1 is an external structural view of an ultra-wideband miniaturized omni-directional whip antenna of the present invention;

fig. 2 and 3 are structural diagrams of the ultra-wideband miniaturized omni-directional whip antenna of the present invention in different directions;

FIG. 4 is a schematic diagram of the standing-wave ratio of the ultra-wideband miniaturized omni-directional whip antenna in the frequency band of 210MHz-690 MHz;

fig. 5 is a smith chart of the ultra-wideband miniaturized omni-directional whip antenna of the present invention after matching.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, the ultra-wideband miniaturized omni-directional whip antenna provided by the invention comprises an engineering plastic pipe sleeve 1 and a dustproof cap 2, wherein a steel cable 3, a PCB 4 and a radio frequency connector 5 are sequentially arranged in the engineering plastic pipe sleeve 1 from top to bottom, a coaxial cable and a corresponding winding coil are welded on the PCB, the antenna body is protected by the engineering plastic pipe sleeve and the dustproof cap, the antenna body is protected by an outer sleeve and can be used in severe environments, the lower part of the steel cable 3 is connected with the upper part of the PCB 4, the lower part of the PCB is connected with the radio frequency connector 5, the coaxial cable is welded on the front side and the back side of the PCB, and the winding coil forms an L C circuit loaded on the antenna, so that the broadband impedance matching of the antenna is realized by adjusting the number of the coaxial cable and the length, referring to fig. 4, after a L C matching circuit is loaded, the working bandwidth of the antenna is obviously improved, the standing wave ratio of a part of a frequency band can be less than 3.5, the broadband requirement is realized, the miniaturization requirement is realized by adopting the steel cable after the free bending, the antenna body, the bandwidth of the antenna is matched, the antenna is adopted, the size of the cable matching circuit is increased, and the size of the inductor matching circuit is increased, and the.

In a preferred but non-limiting embodiment of the present invention, the coaxial line comprises a first coaxial line 6, a second coaxial line 7 and a third coaxial line 8, the winding coils comprise a first winding coil 9, a second winding coil 10 and a third winding coil 11, further preferably, as shown in fig. 2 and fig. 3, the front side of the PCB is welded with the first coaxial line and the second coaxial line, and the back side is welded with the third coaxial line, the first coaxial line, the second coaxial line and the third coaxial line, the first winding coil, the second winding coil and the third winding coil form a L C circuit loaded to the antenna, the present invention adopts a form of loading a L C matching circuit on the antenna, which expands the bandwidth and reduces the size, and the matching circuit element adopts a form of winding inductance and adopting the coaxial line instead of capacitance, thereby improving the power capacity of the antenna.

In the invention, the length of the coaxial line is adjustable; the coil number of turns of the winding coil can be adjusted, so that the broadband impedance matching of the antenna can be realized by adjusting the coil number of turns and the length of the coaxial line.

In the invention, the steel cable can be freely bent and reset, thereby meeting the requirement of portability.

The following provides a specific embodiment of the present invention