CN102456949A - Beam wave adjusting device for horn antenna - Google Patents

Abstract

A beam adjusting device for a horn antenna. The horn antenna comprises an opening and a ring body surrounding the opening, and the beam wave adjusting device comprises: the metal guide piece is used for adjusting the width of a beam formed by the horn antenna according to the disc surface characteristic of a satellite antenna corresponding to the horn antenna; and a fixing member for fixing the metal guide member to the horn antenna; the satellite antenna is used for receiving the signals transmitted by the horn antenna. The beam wave adjusting device can obtain the required beam wave width under the condition of not changing the size of the horn antenna die aiming at different dish surface designs so as to improve the receiving quality.

Description

Beam adjustment device for horn antenna

technical field

The invention relates to a beam adjustment device, especially a beam adjustment device for adjusting the width of a beam formed by a horn antenna.

Background technique

Satellite communication has the advantages of wide coverage and no interference from the ground environment. It is widely used in military, detection and commercial communication services, such as satellite navigation, satellite voice broadcast or satellite TV broadcast. The known satellite communication receiving device is composed of a dish reflector (Dish Reflector) and a wave collector (Low Noise Block Down-converter with Feedhom, LNBF). Receive the radio wave signal reflected by the dish-shaped reflector, down-convert the radio wave signal to an intermediate frequency, and then send it to a satellite signal processor at the back end for signal processing, so that the public can watch satellite TV programs.

The wave collector is composed of a horn antenna (Feedhom), a waveguide (Waveguide) and a low noise down-converter (LNB). Among them, the horn antenna is used to collect the signal reflected by the satellite antenna and guide it into the waveguide, and then output it to the low-noise down-frequency amplifier. In addition to receiving satellite signals, the function of the horn antenna can also transmit signals (reflected by the dish reflector) to satellites in different applications.

The receiving quality of the satellite antenna has a very important relationship with the setting position of the horn antenna. For example, the electromagnetic wave emitted by the horn antenna from the focal point is reflected to the satellite by the dish-shaped reflector. When the horn antenna deviates slightly from the focus position, the signal received by the satellite antenna will be greatly reduced. In fact, the focus position is usually expressed according to the focal length-diameter ratio (Focal Length to Diameter ratio, F/D) of the dish surface. It is worth noting that the combination of the focal length-to-diameter ratio of the dish surface (hereinafter referred to as F/D value) and the beam width emitted by the horn antenna will affect the receiving performance of the satellite antenna. In other words, different F/D designs need to be matched with different beam widths so that the satellite antenna can effectively receive the beam of the horn antenna. For example, compared to the dish design of F/D=0.4, the dish design of F/D=0.6 needs to match the beam with a narrower beam width. If the beam width does not meet the dish design (such as too wide or too narrow), it will affect the receiving performance of the satellite antenna and reduce the receiving quality of the satellite signal.

However, currently there is no related device for adjusting the beam width of the horn antenna in the market, so it is impossible to improve the compatibility with different dish designs. In addition, in order to cope with the trend of miniaturization and reduce costs, manufacturers will try their best to minimize the product design at the beginning of product design. Therefore, how to design the beamwidth that best matches the dish surface while reducing the aperture size of the horn antenna is also one of the important issues.

Contents of the invention

Therefore, the main purpose of the present invention is to provide a beam adjusting device for a horn antenna, which is used to adjust the width of the beam emitted by the horn antenna, so as to achieve better matching performance with the dish of the satellite antenna.

The invention discloses a beam adjustment device for a horn antenna. The horn antenna includes an opening and a ring surrounding the opening. The beam adjustment device includes: a metal guide, which is used to The dish surface characteristics of a satellite antenna corresponding to the horn antenna, adjust the beam width formed by the horn antenna; and a fixing piece, the fixing piece is used to fix the metal guide to the horn antenna; To receive the signal transmitted by the horn antenna.

According to different dish surface designs (eg different F/D values), the present invention can obtain the required beam width without changing the mold size of the horn antenna, so as to improve the receiving quality. Furthermore, the beam adjusting device of the present invention can maintain the same beam width when the aperture size of the horn antenna is reduced, so as to match the dish design and effectively reduce the cost.

Description of drawings

FIG. 1 is a schematic diagram of a beam adjusting device used in a horn antenna according to an embodiment of the present invention.

2 to 5 are schematic diagrams of beam adjusting devices according to various embodiments of the present invention.

FIG. 6 is a schematic diagram of the beam adjusting device of FIG. 1 being used in a waterproof mechanism assembly.

FIG. 7 is a schematic diagram of a beam of a horn antenna without a beam adjusting device according to an embodiment of the present invention.

FIG. 8 is a schematic diagram of the beam of the horn antenna in FIG. 1 .

FIG. 9 is a schematic diagram of the beam of the horn antenna in FIG. 3 .

FIG. 10 is a comparison table of beam widths in FIGS. 7 to 9 .

Description of main component symbols:

10, 20, 30, 40, 50 beam adjustment device

100 Horn Antenna

102 open mouth

104 ring body

200 Waterproof mechanism components

Detailed ways

Please refer to FIG. 1 , which is a schematic diagram of a beam adjusting device 10 according to an embodiment of the present invention. The beam adjusting device 10 is used for a horn antenna 100 , and the horn antenna 100 includes an opening 102 and a ring 104 surrounding the opening 102 . In FIG. 1 , the beam adjusting device 10 is composed of a metal guide (conductor), which is used to adjust the position of the horn antenna 100 according to the dish surface characteristics of a satellite antenna (not shown in the figure) corresponding to the horn antenna 100. The width of the formed beam. Wherein, the dish surface characteristic may be a focal length diameter ratio. It should be noted that the metal guide of the beam adjustment device 10 can be in symmetrical geometric shapes such as orthogonal crosses, concentric rings, point-like eccentric circles, or radiation divergence, and can pass through a fixing piece (not shown in the figure) The horn antenna 100 is disposed above, below or on the same plane reference as the opening 102 of the horn antenna 100 . The fixing part is mainly used to fix the metal guide to the horn antenna 100 , as long as the component or method used to assemble the metal guide to the horn antenna 100 falls within the scope of the present invention. For example, the fixing part can be a welding point for welding the metal guide to the outer edge of the opening of the horn antenna 100 or the inner wall of the ring body 104; or it can be a cylinder extending from the ring body 104 to the opening 102 , used for assembling the metal guide on the top of the cylinder, so as to achieve the function of fixing the metal guide to the horn antenna 100 . Simply put, the size and shape of the metal guide or the position of the horn antenna 100 will change the beam width. Therefore, the embodiment of the present invention can adjust the beam width emitted by the horn antenna 100 to the satellite antenna through the design of the beam adjustment device 10. The beam width can improve the signal receiving performance of the satellite antenna and achieve the best receiving quality. Furthermore, the embodiment of the present invention can achieve the best compatibility between the horn antenna 100 and different satellite antennas (such as dish designs with different F/D values).

In Fig. 1, the beam adjustment device 10 is an orthogonal polarization design, which can reflect and extend the electric field feedback path and concentrate the current to enhance the directivity of the beam and achieve the effect of beam concentration, so as to avoid excessive beam width. Large enough to cause some beams to be unreceived, thereby improving the receiving performance of the satellite antenna. Wherein, the orthogonal polarization design can be symmetrical or asymmetrical orthogonal (eg length, width or height). In addition, the design of concentrating the beam through the beam adjusting device 10 can also be used to reduce the opening size of the horn antenna 100 without affecting the compatibility with the dish surface design, and can reduce the manufacturing cost.

It can be seen from the above that, in the case that the opening size of the horn antenna 100 is fixed, the compatibility with the dish surface can be improved through the beam adjusting device 10 to improve the receiving quality. On the other hand, when the aperture size of the horn antenna 100 is reduced, the beam adjusting device of the embodiment of the present invention can maintain or obtain a better beam width, so the aperture area of the horn antenna 100 can be effectively reduced , to increase the feasibility of installing with a variety of satellite dishes.

It is worth noting that the beam adjustment device 10 of the embodiment of the present invention can be applied to any form of horn antenna, such as conical (conical), pyramid (pyramidal), corrugated (corrugated), dielectric load (dielectric-load) , lens-corrected, dielectric (dielectric) or array (array) and other forms of horn antenna, or applied in different opening shapes, such as square, circular, rectangular, rhombus or ellipse, etc., instead of limited to this.

Therefore, with different forms of beam adjusting devices, the horn antenna 100 can obtain the best antenna efficiency at different operating frequencies. For example, please refer to FIGS. 2-5 , which are schematic diagrams of beam adjusting devices 20-50 according to various embodiments of the present invention. As shown in Figure 2, the metal guide of the beam adjustment device 20 is non-coplanar with the opening 102 and is in the shape of a radial ring; as shown in Figure 3, the metal guide of the beam adjustment device 30 is coplanar with the opening 102 and is Concentric annular; as shown in Figure 4, the metal guide of the beam adjustment device 40 is coplanar with the opening 102 and is discontinuous annular; and as shown in Figure 5, the metal guide of the beam adjustment device 50 and The opening 102 is non-coplanar and eccentric. Therefore, under the design of the beam adjusting devices 30 and 40 shown in FIG. 3 and FIG. 4 , the high frequency is less likely to lose matching in the electric field reflection feedback and cause the beam shape to be deformed. On the other hand, under the design of the beam adjusting devices 20 and 50 shown in FIG. 2 and FIG. 5 , the beam width can be adjusted for low frequency, intermediate frequency and high frequency, so as to achieve the beam width conforming to the dish surface, thereby reducing the Antenna loss to get the optimum value of antenna gain. In addition, the beam adjusting devices 10, 20, 30, 40, 50 of the embodiments of the present invention can also achieve the effect of impedance matching, so as to reduce the return loss of the antenna.

According to the above, the beam adjustment device of the embodiment of the present invention can be arranged not only on the plane of the opening 102 of the horn antenna 100 , but also above or below the opening 102 . For example, in FIG. 6 , the beam adjusting device 10 is instead disposed on a waterproof mechanism component 200 corresponding to the horn antenna 100 , such as a waterproof cover (Feed Cap). Furthermore, the beam adjusting device 10 can be electroplated on the waterproof mechanism component 200 by electroplating, or it can be included on the waterproof mechanism component 200 during injection molding, or it can be set on the waterproof mechanism with metal sheets such as nickel-nickel metals. Component 200 on. It should be noted that, in addition to the beam adjusting device 10 , the beam adjusting devices 20 , 30 , 40 , and 50 can also be applied to the waterproof mechanism assembly 200 , without being limited thereto.

Please continue to refer to FIGS. 7 to 9 , which are schematic diagrams of the horn antenna 100 without any beam adjustment device, with the beam adjustment device 10 , and with the beam adjustment device 30 at a working frequency of 10.7 GHz. It can be known from Fig. 7 to Fig. 9 that when the beam adjustment device is not installed, the beam width of the horn antenna 100 is wider; and comparing Fig. 8 and Fig. 9, it can also be known that in the beam width at 10dB, using The beam width of the cross-shaped beam adjusting device 10 is relatively concentrated, while the beam width of the beam adjusting device 30 designed using concentric rings is wider. Please also refer to FIG. 10 , which is a comparison table of beam widths in FIGS. 7 to 9 . It can be seen from FIG. 10 that, compared with the horn antenna 100 without any beam adjusting device, the beam width using the beam adjusting device 10 is changed from the original 80.22 degrees (beams measured in the horizontal, vertical and 45 degree directions) The average value of the beam width) is narrowed to 69.35 degrees, which is more in line with the design of the dish surface with F/D=0.6; while the beam width using the beam adjustment device 30 can be enlarged to 92.66 degrees, which is more in line with the dish surface design with F/D=0.4 design. It can be seen that, through the design of the beam adjusting device, the beam width of the horn antenna 100 can be adjusted by plus or minus 15 degrees at 10 dB. It is worth noting that in the embodiment of the present invention, the beam width can be adjusted to better meet the characteristics of the satellite antenna without changing the opening size or mold opening size of the horn antenna.

To sum up, compared with the known technology, the beam width cannot be adjusted, and the optimal matching effect with the dish surface cannot be achieved, resulting in poor reception quality. The embodiment of the present invention can obtain the required beam width for different dish surface designs (such as different F/D values) without changing the mold size of the horn antenna, so as to improve the receiving quality. Furthermore, the beam adjusting device of the embodiment of the present invention can maintain the same beam width when the aperture size of the horn antenna is reduced, so as to match the dish design and effectively reduce the cost.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the claims of the present invention shall fall within the scope of the present invention.

Claims (7)

1. bundle ripple adjusting device that is used for horn antenna, this horn antenna comprise dehisces and around this ring body of dehiscing, this bundle ripple adjusting device comprises:

One metal guiding element, this metal guiding element are used for adjusting the formed bundle wave width of this horn antenna according to the dish face characteristic of the pairing satellite antenna of this horn antenna; And

One fixture, this fixture are used for fixing this metal guiding element in this horn antenna;

Wherein, this satellite antenna is used for receiving the signal that this horn antenna is launched.

2. bundle ripple adjusting device as claimed in claim 1, wherein this dish face is characterized as F/D focal length/diameter.

3. bundle ripple adjusting device as claimed in claim 1, wherein this metal guiding element is arranged at top, below or the isoplanar benchmark of this opening of this horn antenna.

4. bundle ripple adjusting device as claimed in claim 1, wherein this metal guiding element is arranged on the waterproof mechanism assembly to this opening that should horn antenna.

5. bundle ripple adjusting device as claimed in claim 4, wherein this metal guiding element is to be plated on this waterproof mechanism assembly with the conductive film form, or is arranged on this waterproof mechanism assembly with the sheet metal form.

6. bundle ripple adjusting device as claimed in claim 1, the wherein geometry that is shaped as symmetry of this metal guiding element.

7. bundle ripple adjusting device as claimed in claim 6, wherein this geometry is that quadrature cross, donut, point-like off-centre operation or radiation such as disperse at shape.

Images