CN214153187U - Rod-shaped omnidirectional antenna with UHF (ultra high frequency) wave band - Google Patents

Abstract

The embodiment of the utility model discloses a rod-shaped omnidirectional antenna of UHF wave band, one includes top loading, metal oscillator, metal installation base and joint, and top loading, metal oscillator and joint connect gradually, and the metal installation base is the ring form, and the junction of metal oscillator and joint can be installed on the internal diameter of metal installation base through the screw; the utility model provides a bar omnidirectional antenna improves miniaturized and light-duty design on the basis of guaranteeing antenna gain, dwindles the shared space of installation greatly to simple structure is reliable, the performance preferred.

Description

Rod-shaped omnidirectional antenna with UHF (ultra high frequency) wave band

Technical Field

The utility model relates to the technical field of antennas, specifically a rodlike omnidirectional antenna of UHF wave band.

Background

UHF refers to radio waves with a wavelength range of 1m to 0.1m and a frequency of 300 MHz to 3000MHz, and is commonly used in the fields of mobile communication and broadcast television. The UHF band is low and the wavelength is long, and generally, the antenna of this band is large in size and weight, and is greatly limited when used for terminal equipment and airborne communication, so that the UHF band antenna generally has the characteristics of miniaturization and light weight in general communication equipment. Especially for omni-directional antennas, it is difficult to use them effectively without miniaturization, so that the height of such antennas is more critical in practical applications.

The antenna of miniaturized UHF frequency channel is mostly metal oscillator or printing oscillator, and metal oscillator's antenna is rod antenna promptly, and printing oscillator antenna can make sword shape or fish fin shape. Compared with the printed oscillator, the antenna of the metal oscillator has higher radiation efficiency and gain, and has simple form and high structural strength.

However, the existing antenna still has the defects of large occupied installation space, heavy weight of the antenna and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a bar omnidirectional antenna improves miniaturized and light-duty design on the basis of guaranteeing antenna gain, dwindles the shared space of installation greatly to simple structure is reliable, the performance preferred.

To achieve the purpose, the embodiment of the present invention provides the following technical solutions:

a rod-shaped omnidirectional antenna with UHF waveband comprises a top loading part, a metal oscillator, a metal mounting base and a joint, wherein the top loading part, the metal oscillator and the joint are sequentially connected, the metal mounting base is in a circular ring shape, and the joint of the metal oscillator and the joint can be mounted on the metal mounting base through screws.

Preferably, the joint is an N-KFD female joint. The joint uses the female head of N-KFD can strengthen the waterproof performance of antenna, ensures that the antenna can be used normally in comparatively abominable operational environment.

Preferably, the top load is cylindrical, and the diameter of the top load is not smaller than that of the metal vibrator. The diameter of the top-loaded cylinder is larger than that of the metal oscillator, so that the whole height of the antenna is reduced by capacitive loading.

Preferably, the metal vibrator is a hollow aluminum tube. On one hand, the hollow structure can reduce the weight of the antenna, and the aluminum material has lighter weight than the metal such as copper, iron and the like; on the other hand, because the electromagnetic wave has skin depth in the metal conductor, the radiation of the vibrator only depends on a very thin metal surface layer on the surface, the loss of the electromagnetic wave in the metal conductor is very large, the field intensity is very small, and the radiation performance is not influenced by the interior of the metal conductor.

Preferably, the metal mounting base is a circular ring-shaped base, and the diameter of the metal mounting base is 50-80 mm; more preferably, the diameter is 50 mm. The installation space is greatly reduced, but the performance is not affected. The practical situation during the use is that the antenna is arranged on a relatively large metal surface and is equivalent to an infinite bottom plate, the same condition is set during simulation, so that the radiation performance of the antenna can be correctly ensured without an overlarge bottom plate, and then the reliability of the design is proved through a practical test result.

Preferably, the length of the rod-shaped omnidirectional antenna at the UHF band is 200-220 mm; further preferably, the length of the UHF-band rod-shaped omnidirectional antenna is 205 mm. Corresponding to only 22% of the length of the wavelength of the center frequency.

Preferably, the top loading, the metal oscillator and the joint are connected in sequence in a threaded manner.

Preferably, the outer layer of the UHF waveband rod-shaped omnidirectional antenna is provided with spray paint to protect a metal structure.

Preferably, the total weight of the antenna is not more than 90 g.

Compared with the prior art, the utility model has following advantage: the utility model provides a small, light in weight and good antenna of performance. The height of the antenna is 22% of the wavelength of the central working frequency, and no matching device is arranged; the total weight of the antenna is 90g, and the weight is greatly reduced; the diameter of the antenna mounting base is only 50mm, and the occupied mounting space is extremely small.

Drawings

To more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments of the present invention will be briefly described below.

It should be apparent that the drawings in the following description are only for some embodiments of the present invention, and that other drawings can be obtained by those skilled in the art without any inventive exercise, and the other drawings also belong to the drawings required for the embodiments of the present invention.

Fig. 1 is a schematic structural diagram of a rod-shaped omnidirectional antenna with UHF band according to an embodiment of the present invention;

fig. 2 is a simulation result of port standing waves according to an embodiment of the present invention;

fig. 3 is a horizontal plane gain simulation result according to an embodiment of the present invention.

Reference numerals: 1. top loading, 2, a metal vibrator, 3, a metal mounting base and 4, an N-KFD female joint.

Detailed Description

In order to make the purpose, technical solution, beneficial effect and obvious progress of the embodiments of the present invention clearer, the drawings provided in the embodiments of the present invention will be combined below to clearly and completely describe the technical solution in the embodiments of the present invention.

It is obvious that all of these described embodiments are only some, not all embodiments of the invention; based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that the terms "first", "second" and "third" (if present) and the like in the description and claims of the present invention and the accompanying drawings of the embodiments of the present invention are used only for distinguishing different objects and not for describing a particular order. Furthermore, the terms "comprises" and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.

It is to be understood that:

in the description of the embodiments of the present invention, the terms "upper", "lower", "top", "bottom", and other indicative orientations or positions are only used for describing the orientations or positional relationships shown in the drawings according to the embodiments of the present invention, and are not intended to indicate or imply specific orientations, specific orientation configurations, and operations that the devices or elements must have, and therefore, should not be construed as limiting the present invention.

In the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be understood in a broad sense, and may be, for example, fixedly connected, detachably connected, or movably connected, or integrated; either directly or indirectly through intervening media, intangible signal, or even optical, communication between two elements, or an interaction between two elements, unless expressly limited otherwise.

The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It should be further noted that the following embodiments may be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments.

The technical solution of the present invention will be described in detail with reference to specific examples.

Example 1

As shown in fig. 1, a rod-like omnidirectional antenna with UHF band is shown, which comprises a top load 1, a metal oscillator 2, a metal mounting base 3, and an N-KFD female joint 4, wherein the top of the metal oscillator 2 is provided with a thread, the top load 1 is fastened and connected with the top of the metal oscillator 2 through a section of metal with the thread, the bottom of the metal oscillator 2 is also provided with a thread, the inner conductor metal column of the N-KFD female joint 4 is also provided with a thread, the N-KFD female joint 4 is tightly connected with the metal vibrator 2 through the thread, and is arranged on the back of the metal mounting base 3 through a screw, the metal mounting base 3 is in a ring shape, the ring can allow the inner conductor metal column of the N-KFD female joint 4 to pass through after being connected with the metal vibrator 2, and does not contact the metal mounting base 3, thereby avoiding short circuit, and the annular gap is fixed by gluing.

In the present embodiment, the top load 1 is cylindrical, and the diameter of the top load 1 is larger than that of the metal vibrator 2.

In the present embodiment, the metal vibrator 2 is a hollow aluminum pipe.

In the present embodiment, the metal mounting base 3 is an annular base, and has an outer diameter of 50 mm.

In the embodiment, the length of the rod-shaped omnidirectional antenna in the UHF band is 205 mm; the outer layer of the UHF waveband rod-shaped omnidirectional antenna is provided with spray paint.

Example 2

The UHF-band rod-shaped omnidirectional antenna port standing wave simulation result and the horizontal plane gain simulation result of example 1 are shown in fig. 2 and 3, respectively.

As shown in fig. 2, the antenna standing wave is less than 1.3 in the frequency ranges labeled m1(344MHz, 1.1366) and m2(336MHz, 1.2344), indicating that the antenna port reflects little energy.

As shown in FIG. 3, the gain is greater than 5.8dB and the out-of-roundness of the horizontal plane is less than 0.2 dB. The antenna is shown to have excellent performance in omni-directional radiation,

in conclusion, the nature of example 1 is not only light weight and small volume, but also good performance.

The description of the terms "present embodiment," "embodiments of the invention," "as shown at … …," "further improved technical solutions," etc., 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 invention; in this specification, the schematic representations of the terms used above are not necessarily for the same embodiment or example, and the particular features, structures, materials, or characteristics described, etc., may be combined or brought together in any suitable manner in any one or more embodiments or examples; furthermore, those of ordinary skill in the art may combine or combine features of different embodiments or examples and features of different embodiments or examples described in this specification without undue conflict.

Finally, it should be noted that:

the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same;

although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions described in the foregoing embodiments may be modified or equivalent replaced by some or all of the technical features, and such modifications or replacements may not cause the essence of the corresponding technical solutions to depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (6)

1. The rod-shaped omnidirectional antenna with the UHF waveband is characterized by comprising a top loading part, a metal oscillator, a metal mounting base and a joint, wherein the top loading part, the metal oscillator and the joint are sequentially connected, the metal mounting base is annular, and the joint of the metal oscillator and the joint can be mounted on the metal mounting base through screws.

2. The UHF-band rod-shaped omnidirectional antenna of claim 1, wherein the top loading is a cylindrical capacitive loading, and a diameter of the top loading is not less than a diameter of the metal element.

3. The UHF-band rod-shaped omnidirectional antenna of claim 1, wherein the diameter of the metal mounting base is 50-80 mm.

4. The UHF-band rod-shaped omnidirectional antenna of claim 1, wherein the length of the UHF-band rod-shaped omnidirectional antenna is 200-220 mm.

5. The UHF-band rod-shaped omnidirectional antenna of claim 1, wherein the top-loading, the metal element and the connector are connected in sequence by a threaded connection.

6. The UHF-band rod-shaped omnidirectional antenna of claim 1, wherein the total weight of the antenna is not greater than 90 g.

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