A satellite communication antenna anti-interference shielding device

Abstract

This application discloses a satellite communication antenna anti-interference shielding device for use in the field of satellite communication. The satellite communication antenna anti-interference shielding device is a cylinder with a predetermined thickness, uniformly distributed with numerous holes, and possessing shielding and suppression capabilities. The size of the holes and the thickness of the cylinder with shielding and suppression capabilities create a waveguide angle suppression effect with the radiated interference signal, thereby increasing the wide-spectrum anti-interference shielding performance of the satellite communication antenna.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of satellite communication, in particular to an anti-interference shielding device for satellite communication antenna. BACKGROUND

[0002] Currently, satellite communication mainly uses Ku frequency band (K band frequency low band under IEEE 521-2002 standard) for forward and return data communication. Since Ku frequency band is far away from other equipment frequency bands of unmanned aerial vehicle and other platforms, such as line-of-sight link frequency, air traffic control response frequency, global positioning system (GPS) frequency, etc. Generally, the probability of satellite communication being interfered is not large, but as the newly added frequency equipment of unmanned aerial vehicle and other platforms develops towards high frequency and wideband, when the upper band frequency of the wideband transmitting equipment on the same platform also enters the Ku satellite communication forward receiving working frequency band, satellite communication may be interfered. Due to the high sensitivity characteristics of satellite communication receiving, combined with the large transmitting power of the transmitting equipment on the same platform, the spatial isolation between the original satellite communication and the transmitting equipment installation position cannot completely guarantee mutual electromagnetic compatibility. The current common electromagnetic compatibility design means can only solve the compatibility problem of different frequencies of receiving and transmitting, and can only adopt time staggered peak measures for the same frequency interference, that is, the unmanned aerial vehicle equipment transmits signals and the satellite stops receiving signals in time-sharing work, but in actual application, the receiving and transmitting equipment cannot work in time-sharing, so the conventional electromagnetic compatibility means cannot solve the same frequency interference problem.

[0003] In view of the above-mentioned technology, it is an urgent problem for those skilled in the art to seek an anti-interference shielding device for satellite communication antenna. SUMMARY

[0004] The purpose of the present application is to provide an anti-interference shielding device for satellite communication antenna, which can solve the same frequency interference problem that the conventional electromagnetic compatibility means in the prior art cannot solve.

[0005] To solve the above technical problems, on the one hand, the present application provides an anti-interference shielding device for satellite communication antenna, which is a cylindrical body with a predetermined thickness, uniformly filled with a plurality of holes and having shielding suppression performance.

[0006] Preferably, the cross-sectional shape of the cylindrical body is the same as the mouth shape of the satellite communication antenna, and the anti-interference shielding device for satellite communication antenna covers the mouth of the satellite communication antenna.

[0007] Preferably, the shape of the hole is consistent in size and shape except for the edge of the anti-interference shielding device for satellite communication antenna.

[0008] Preferably, the minimum opening size of the hole is greater than or equal to the wavelength corresponding to the lowest frequency of the communication signal.

[0009] Preferably, the maximum opening size of the holes is less than the wavelength corresponding to the highest frequency of the filtered signal.

[0010] Preferably, the thickness of the cylinder is greater than or equal to the wavelength corresponding to the lowest frequency of the filtered signal.

[0011] Preferably, the thickness of the metal layer between adjacent holes in the cylinder is determined based on the antenna gain corresponding to the communication frequency of the satellite communication antenna.

[0012] Preferably, the satellite communication antenna anti-interference shielding device covers the mouth surface of the satellite communication antenna through the satellite communication antenna structure.

[0013] Preferably, the coverage area of the satellite communication antenna anti-interference shielding device and the inner surface of the antenna reflector in the satellite communication antenna form a hollow area.

[0014] Preferably, the electromagnetic wave radiation reflection condition corresponding to the hollow area is the same as the electromagnetic wave radiation reflection condition corresponding to the satellite communication antenna before being covered.

[0015] Preferably, the surface of the holes of the satellite communication antenna anti-interference shielding device is sprayed with a wave-absorbing coating.

[0016] As can be seen, the present application covers a satellite communication antenna anti-interference shielding device on the mouth surface of the satellite communication antenna. The satellite communication antenna anti-interference shielding device is a cylinder with a predetermined thickness, uniformly filled with a plurality of holes, and has shielding and suppression performance. By the size of the holes and the thickness of the metal material cylinder and the waveguide angle suppression effect formed by the radiation interference signal, the same frequency anti-interference shielding performance of the satellite communication antenna is increased. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application, the drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0018] Figure 1 A plan view of a satellite communication antenna anti-interference shielding device according to an embodiment of the present application is provided.

[0019] Figure 2 A side view of a satellite communication antenna anti-interference shielding device according to an embodiment of the present application is provided.

[0020] Figure 3 A satellite communication antenna + satellite communication antenna anti-interference shielding device according to an embodiment of the present application is provided.

[0021] Figure 4 A satellite communication antenna anti-interference shielding efficiency diagram according to an embodiment of the present application is provided.

[0022] Figure 5 A schematic diagram of a satellite communication antenna provided by an embodiment of the present application;

[0023] Figure 6 An 11 GHz directional diagram of a satellite communication antenna without an anti-interference shielding device provided by an embodiment of the present application;

[0024] Figure 7 An 11 GHz directional diagram of a satellite communication antenna with an anti-interference shielding device provided by an embodiment of the present application;

[0025] Figure 8 A schematic diagram of waveguide same-frequency signal transmission provided by an embodiment of the present application;

[0026] Figure 9 A schematic diagram of waveguide low-frequency signal transmission suppression provided by an embodiment of the present application;

[0027] Figure 10 A schematic diagram of waveguide same-frequency and high-frequency signal angle transmission suppression provided by an embodiment of the present application;

[0028] Figure 11 A simulation isolation degree diagram of an interference source between a satellite communication antenna without an anti-interference shielding device and a parallel satellite communication antenna port provided by an embodiment of the present application;

[0029] Figure 12 A simulation isolation degree diagram of an interference source between a satellite communication antenna with an anti-interference shielding device and a parallel satellite communication antenna port provided by an embodiment of the present application.

[0030] The reference signs: satellite communication antenna anti-interference shielding device 1, satellite communication antenna 2, satellite communication antenna feed element 21, signal processing channel 22, first satellite signal 3, waveguide 4, second satellite signal 5, first interference signal 6, second interference signal 7, third interference signal 8, A and B are two ports of the waveguide 4. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0032] The core of the present application is to provide a satellite communication antenna anti-interference shielding device and an anti-interference satellite communication antenna.

[0033] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0034] Figure 1 This is a plan view of a satellite communication antenna anti-interference shielding device provided in an embodiment of this application. Figure 2 This is a side view of a satellite communication antenna anti-interference shielding device provided in an embodiment of this application. Figure 3 This is a schematic diagram of a satellite communication antenna + satellite communication antenna anti-interference shielding device provided in an embodiment of this application, as shown below. Figure 1 , 2 As shown in Figure 3, the anti-interference shielding device 1 of the satellite communication antenna is a cylinder with a preset thickness, uniformly filled with several holes and having shielding and suppression performance. The cylinder with shielding and suppression performance is preferably a cylinder made of metal material. Furthermore, the cross-sectional area of ​​the anti-interference shielding device 1 of the satellite communication antenna is the same as the aperture area of ​​the satellite communication antenna 2, and the anti-interference shielding device 1 of the satellite communication antenna covers the aperture of the satellite communication antenna 2.

[0035] In a specific embodiment, the satellite communication antenna anti-interference shielding device 1 is disposed on the port of the satellite communication antenna 2 to shield the port through which the satellite communication antenna receives signals. The satellite communication antenna anti-interference shielding device 1 is designed as a cylindrical metal material with a preset thickness and a plurality of holes evenly distributed throughout. The size of the holes affects the wavelength and frequency of the communication signal, so the size of the holes needs to be designed according to actual requirements.

[0036] like Figure 4 As shown, for interference suppression, the deeper the hole in the metal cylinder, the better. However, since the metal cylinder is fixed at the port cover of the satellite communication antenna 2, it moves with the antenna. To ensure that the satellite communication signal passes through the interference suppression shielding device 1 in a straight line, and due to the height limitation of the satellite dome, the thickness of the metal cylinder cannot be increased indefinitely. Therefore, in the design, the thickness of the cylinder (the depth of the hole) only needs to satisfy the relative balance between the two, but should not be less than the wavelength corresponding to the minimum frequency of the filtered signal. In addition, the installation position of the equipment determines that the satellite communication antenna 2 has an angular difference in elevation or azimuth with other interfering equipment. The satellite communication antenna 2 is always pointing upwards at the satellite, and the situation where the platform interference signal is directly in the normal direction of the satellite communication antenna 2 generally does not exist.

[0037] And, as Figure 4 and Figure 5As shown, the space behind the port of the satellite communication antenna 2, covered by the anti-interference shielding device 1, includes the satellite communication antenna feed element 21, the signal processing channel 22, and the signal reflection space (a hollow area) formed by the line connecting the antenna 2's port cover edge and the inner reflective surface of the satellite communication antenna 2. This space is the reflection working area for the satellite to transmit and receive the first satellite signal 3. Therefore, the first satellite signal 3, whether received or transmitted, passes through the anti-interference shielding device 1 in a straight line. During reception, the first satellite signal 3 passes through the anti-interference shielding device 1 in a straight line from the external space, reaches the arc-shaped reflective surface at the bottom of the satellite communication antenna 2, and is reflected to the satellite communication antenna feed element 21. The satellite communication antenna feed element 21 collects all the satellite reflected signals to form the telemetry data to be received. During transmission, the satellite communication antenna... Feed element 21 transmits forward remote control data, which is converted into a straight-line transmission signal after passing through the arc-shaped reflective surface at the bottom of satellite communication antenna 2. This signal then radiates into external space after passing through the anti-interference shielding device 1. Since the anti-interference shielding device 1 is relatively fixed to the satellite communication antenna 2, maintaining a follow-up state, from a spatial perspective, the anti-interference shielding device 1 at the port of satellite communication antenna 2 does not affect the satellite communication antenna 2's transmission and reception of satellite signals. As an example, based on the minimum satellite communication frequency of 10GHz (wavelength 30cm), the thickness of the anti-interference shielding device is 55cm; the holes are hexagonal, with an opening size greater than or equal to 30cm; the metal thickness of the spacer layer between the hexagonal holes is preferably 0.2mm. The results of electromagnetic software simulation show that… Figure 6 The 11GHz radiation pattern of the satellite antenna without anti-interference shielding device provided in this application embodiment has a maximum gain of 37.02 dB. Figure 7 The 11GHz radiation pattern of the satellite antenna with anti-interference shielding device provided in this application embodiment has a maximum gain of 36.48dB, which is 0.54dB different from the previous gain. Therefore, the anti-interference shielding device has virtually no impact on the satellite communication signal.

[0038] In this design, it should be noted that the coverage surface of the satellite antenna anti-interference shielding device 1 covers the aperture of the satellite antenna 2 through edge support points. In other words, the anti-interference shielding device, through the satellite antenna structure, covers and secures itself to the aperture of the satellite antenna, forming a hollow region with the inner surface of the antenna reflection in the satellite antenna 2. The electromagnetic wave radiation reflection conditions corresponding to this hollow region are the same as those corresponding to the satellite antenna before the shielding device. In other words, the anti-interference shielding device 1 covering the aperture of the satellite antenna 2 will not affect the reflection of internal signals.

[0039] Meanwhile, in order to further improve the high-frequency waveguide angle selection suppression of the satellite communication antenna anti-interference shielding device during the design process, an absorbing coating can be sprayed onto the surface of the satellite communication antenna anti-interference shielding device 1.

[0040] As a preferred option, the size and shape of the holes in the satellite communication antenna anti-interference shielding device are consistent except for the edges, and are not limited to hexagons, rectangles, etc., but are designed according to actual needs.

[0041] Furthermore, the thickness of the metal spacer between adjacent holes in the cylinder is determined based on the antenna gain corresponding to the satellite communication frequency. In other words, the thickness of the metal spacer between adjacent holes in the cylinder is determined so as not to affect the antenna gain of the satellite communication frequency.

[0042] The anti-interference shielding device for satellite communication antenna provided in this application is a cylindrical metal material with a preset thickness, uniformly distributed with a number of holes, and having shielding and suppression performance. The cross-sectional area of ​​the anti-interference shielding device for satellite communication antenna is the same as the aperture area of ​​the satellite communication antenna, and the anti-interference shielding device for satellite communication antenna covers the aperture of the satellite communication antenna. Through the size of its holes and the thickness of the cylindrical metal material, a waveguide angle suppression effect is formed with the radiated interference signal, thereby increasing the anti-interference shielding performance of the satellite communication antenna at the same frequency.

[0043] Its like Figure 8 As shown, the minimum opening size of the holes in the satellite communication antenna anti-interference shielding device 1 is greater than or equal to the wavelength of the lowest frequency signal in the satellite communication operating frequency band (the wavelength corresponding to the lowest frequency of the communication signal). When the second satellite signal 5 propagates from port A to port B through the waveguide 4 formed by each hole on the metal cylinder, the wavelength of the second satellite signal 5 is equal to or less than the minimum opening size of the waveguide 4, and the second satellite signal 5 passes through the waveguide 4 in a straight line. The same applies to satellite transmission and reception signals.

[0044] like Figure 9 As shown, the maximum opening size of the holes in the satellite communication antenna anti-interference shielding device 1 is less than the wavelength of the first external interference signal 6 (the wavelength corresponding to the highest frequency of the filtered signal). When the first interference signal 6 propagates from port A to port B through the waveguide 4 formed by each hole on the metal cylinder, the first interference signal 6 is cut off by the waveguide 4 because the wavelength of the first interference signal 6 is greater than the opening size of the waveguide 4. Therefore, the satellite communication antenna anti-interference shielding device 1 has a shielding effect on the first external interference signal 6, which is greater than the satellite's operating frequency.

[0045] like Figure 10As shown, for the second interference signal 7 corresponding to the aperture size of the satellite antenna anti-interference shielding device 1, or the third interference signal 8 corresponding to the aperture size of the satellite antenna anti-interference shielding device 1, when the second interference signal 7 or the third interference signal 8 is not aligned in a straight line with the waveguide 4, but propagates from port A to port B through the waveguide 4 formed by each aperture on the metal cylinder at a certain angle, the second interference signal 7 or the third interference signal 8 is transmitted in a refracted state of reflection and re-reflection on the inner wall of the waveguide 4. During the transmission process, the signal is attenuated. In particular, after the inner wall of the waveguide 4 is coated with absorbing material, the attenuation effect is more obvious. Therefore, the satellite antenna anti-interference shielding device 1 plays an attenuation role for external interference signals that are less than or equal to the satellite operating frequency, reflecting that the satellite antenna anti-interference shielding device 1 has obvious waveguide angle suppression characteristics, especially the anti-interference effect of the same frequency.

[0046] The results of electromagnetic software simulation show that Figure 11 The simulation isolation diagram of interference sources between the satellite antenna without anti-interference shielding device and the parallel satellite antenna aperture provided in the embodiments of this application (shown in the box) has a minimum value of -63dB. Figure 12 The simulated isolation diagram of the interference source between the satellite antenna with anti-interference shielding device and the parallel satellite antenna aperture provided in the embodiment of this application (shown in the box) shows that the minimum isolation is -91dB, which increases the isolation by 28dB, and the shielding and suppression effect of the satellite antenna anti-interference shielding device is obvious.

[0047] Therefore, the anti-interference shielding device for satellite communication antennas provided in this application has the following advantages:

[0048] 1. The satellite communication antenna anti-interference shielding device has good low-frequency waveguide suppression. The maximum opening size in the metal honeycomb material cylinder corresponds to the frequency of the same wavelength. The satellite communication antenna anti-interference shielding device can effectively block radiated interference signals below this frequency. Therefore, the satellite communication antenna anti-interference shielding device is equivalent to a good high-pass low-impedance broadband filter with obvious filtering effect.

[0049] 2. The anti-interference shielding device for satellite communication antennas has good selective suppression of waveguide angles in the same frequency or high frequency, which can solve the compatibility problem between the radiated signal of high-power transmitting equipment and the high-sensitivity receiver of satellite communication, especially the problem of same frequency compatibility.

[0050] 3. The anti-interference shielding device of the satellite communication antenna can ensure effective communication of satellite signals. The minimum opening size of its hole is not less than the lowest frequency wavelength of the satellite communication signal. Therefore, the hole does not affect the forward direct outgoing and return direct incoming wireless signal transmission of satellite-to-satellite communication.

[0051] 4. Generally, the radiated signals of interference equipment are in the horizontal or in different azimuth directions. The satellite communication antenna transmits and receives signals with the satellite facing upwards. Therefore, the direction of the interference source radiation is inconsistent with the direction of the satellite. Taking advantage of the difference in the antenna directivity patterns of the two, the metal honeycomb-shaped anti-interference shielding device added to the satellite communication antenna cover forms a waveguide angle suppression effect on the radiated interference signal, thereby increasing the anti-interference shielding performance of the same frequency or high frequency.

[0052] 5. When the surface of the metal honeycomb material of the satellite communication antenna anti-interference shielding device is coated with a wave-absorbing coating, the selective suppression of the same frequency or high frequency waveguide angle of the satellite communication antenna anti-interference shielding device can be further improved.

[0053] The above provides a detailed description of a satellite communication antenna anti-interference shielding device provided in this application. The various embodiments in the specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the descriptions are relatively simple, and relevant parts can be referred to in the method section. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

[0054] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. A countermeasure device for a satellite antenna, comprising: The satellite communication antenna anti-interference shielding device is a metal cylindrical body with a preset thickness, uniformly filled with a plurality of holes, and having shielding and suppression performance, the shape of each of the holes is consistent except for the edge of the satellite communication antenna anti-interference shielding device; The minimum opening size of the hole is equal to or greater than the wavelength corresponding to the lowest frequency of the communication signal; the maximum opening size of the hole is less than the wavelength corresponding to the highest frequency of the first interference signal; the thickness of the cylindrical body is equal to or greater than the wavelength corresponding to the lowest frequency of the first interference signal; the first interference signal is a filtered signal with a frequency lower than the communication signal; The thickness of the cylindrical body and the size of the hole are configured to pass the communication signal in the straight line direction of the hole, shield the first interference signal with a frequency lower than the communication signal, and attenuate the second interference signal equal to or greater than the frequency of the communication signal and deviating from the straight line direction of the hole, to form a waveguide angle suppression characteristic.

2. The SATCOM antenna anti-jamming shielding device of claim 1, wherein, The cross-sectional shape of the cylindrical body is the same as the mouth shape of the satellite communication antenna, and the satellite communication antenna anti-interference shielding device covers the mouth of the satellite communication antenna.

3. The SATCOM antenna anti-jamming shielding device of claim 1, wherein, The thickness of the metal layer between adjacent holes in the cylindrical body is determined based on the antenna gain corresponding to the communication frequency of the satellite communication antenna.

4. The SATCOM antenna anti-jamming shielding device of claim 1, wherein, The satellite communication antenna anti-interference shielding device covers the mouth of the satellite communication antenna through the satellite communication antenna structure.

5. The SATCOM antenna anti-jamming shielding device of claim 4, wherein, The coverage area of the satellite communication antenna anti-interference shielding device and the inner surface of the antenna reflector in the satellite communication antenna form a hollow area.

6. The SATCOM antenna anti-jamming shielding device of claim 5, wherein, The electromagnetic wave radiation reflection condition corresponding to the hollow area is the same as the electromagnetic wave radiation reflection condition corresponding to the satellite communication antenna before covering.

7. The SATCOM antenna anti-jamming screen of any of claims 1-6, wherein, The hole surface of the satellite communication antenna anti-interference shielding device is sprayed with a wave-absorbing coating.

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