Broadband satellite communication antenna

Abstract

The application discloses a broadband satellite communication antenna, which can include a frame, a feed module, a first parasitic module and a second parasitic module; the feed module can generate a target radiation signal; there is a gap between the first parasitic module and the frame, and there is a gap between the second parasitic module and the frame; the first parasitic module and the second parasitic module are respectively located on both sides of the feed module; the first parasitic module can be coupled to generate a first harmonic mode, and the target radiation signal and the first harmonic mode generate a first circularly polarized radiation frequency band; a first switch is arranged in the first parasitic module; the second parasitic module can be coupled to generate a second harmonic mode, and the target radiation signal and the second harmonic mode generate a second circularly polarized radiation frequency band; the first harmonic mode and the second harmonic mode are opposite in rotation direction, and the second circularly polarized radiation frequency band and the first circularly polarized radiation frequency band are opposite in rotation direction. It can be seen that the application can guarantee the light weight of the antenna, and realize the concurrent double satellite communication function.

Description

Technical Field

[0001] This application relates to the field of antenna technology, and more specifically, to a broadband satellite communication antenna. Background Technology

[0002] With the continuous evolution and upgrading of mobile communication technology, satellite communication technology is gradually being integrated into mobile terminal devices. Due to the trend towards miniaturization and thinner designs in mobile terminals, antennas need to be compactly distributed along the device's outer frame, resulting in extremely limited layout space and making it impossible to accommodate large multi-polarized antenna components. To adapt to the space constraints of terminals, existing technical solutions generally adopt the design concept of "single-type circularly polarized radiating antenna".

[0003] However, a terminal equipped with only a single type of circularly polarized radiating antenna can only match the satellite functions corresponding to one polarization requirement, making it impossible for the mobile terminal to flexibly adapt to multiple types of satellite communication systems, ultimately resulting in its limited satellite communication functions. Summary of the Invention

[0004] In view of this, this application provides a broadband satellite communication antenna to address the shortcomings of the single satellite communication function of mobile terminals in the prior art.

[0005] To achieve the above objectives, the following solution is proposed:

[0006] A broadband satellite communication antenna includes a frame, a feed module, a first parasitic module, and a second parasitic module;

[0007] The feed module is used to generate the target radiation signal;

[0008] One end of the feed module is connected to the frame, and the other end of the feed module is grounded;

[0009] There is a gap between the first parasitic module and the frame, and there is a gap between the second parasitic module and the frame;

[0010] The first parasitic module and the second parasitic module are located on both sides of the feed module, respectively;

[0011] The first parasitic module is used to couple and generate a first harmonic mode, and the target radiated signal and the first harmonic mode generate a first circularly polarized radiation frequency band;

[0012] The first parasitic module is equipped with a first switch;

[0013] The second parasitic module is used to couple and generate a second resonant mode. The target radiated signal and the second harmonic mode generate a second circularly polarized radiation frequency band. The first harmonic mode and the second harmonic mode have opposite rotation directions, and the second circularly polarized radiation frequency band has opposite rotation directions to the first circularly polarized radiation frequency band.

[0014] Optionally, the feed module has an I-shaped structure.

[0015] Optionally, the first parasitic module has an L-shaped structure.

[0016] Optionally, a parasite is provided on the vertical side of the first parasitic module;

[0017] The first switch is located on the horizontal side of the first parasitic module;

[0018] There is a gap between one end of the parasite and the frame, and the parasite is coupled to the feed module through the gap;

[0019] One end of the first switch is connected to the parasite, and the other end is grounded.

[0020] Optionally, the first switch is an aperture tuning switch.

[0021] Optionally, the second parasitic module includes a parasitic radial arc and a right-angle structure;

[0022] There is a gap between the parasitic radiating arc and the frame, and the parasitic radiating arc is coupled to the feed module through the gap;

[0023] One end of the right-angled structure is connected to the parasitic radiation arc, and the other end is grounded.

[0024] Optionally, the right-angle structure is a right-angle broken line with a long conductor in the horizontal direction and a short conductor in the vertical direction;

[0025] One end of the long conductor is connected to the parasitic radiation arc;

[0026] One end of the short conductor is grounded.

[0027] Optionally, the right-angle structure is a right-angle broken line with a second switch in the horizontal direction and a short wire in the vertical direction;

[0028] One end of the second switch is connected to the parasitic radiation arc;

[0029] One end of the short conductor is grounded.

[0030] Optionally, the first harmonic mode covers the operating frequency band of the satellite communication antenna; the second resonant mode covers the receiving frequency band of short message satellite communication.

[0031] Optionally, the first harmonic mode covers the receiving frequency band of short message satellite communication; the second resonant mode covers the operating frequency band of the satellite communication antenna.

[0032] As can be seen from the above technical solution, the broadband satellite communication antenna provided in this application may include a frame, a feed module, a first parasitic module, and a second parasitic module. The feed module is used to generate a target radiated signal. One end of the feed module is connected to the frame, and the other end of the feed module is grounded. There is a gap between the first parasitic module and the frame, and a gap between the second parasitic module and the frame. The first parasitic module and the second parasitic module are respectively located on both sides of the feed module. The first parasitic module is used to couple and generate a first harmonic mode, and the target radiated signal and the first harmonic mode generate a first circularly polarized radiation frequency band. The second parasitic module is used to couple and generate a second resonant mode, and the target radiated signal and the second harmonic mode generate a second circularly polarized radiation frequency band. The first harmonic mode and the second harmonic mode have opposite rotation directions, and the second circularly polarized radiation frequency band has opposite rotation directions to the first circularly polarized radiation frequency band. Based on this, the first parasitic module and the feed module of this application can be combined to form one type of polarized antenna; the second parasitic module and the feed module can be combined to form a second type of polarized antenna. By reusing the feed module, the redundancy of antenna components is reduced. Compared to the traditional dual-independent polarization antenna design that requires two complete sets of feed superimposed radiators, fewer components are needed, directly reducing the overall size and weight of the antenna and meeting the lightweight requirements of mobile terminal antenna setups. Two parasitic modules are symmetrically distributed on both sides of the feed, ensuring independent and interference-free coupling processes for each. Furthermore, through the design of "opposite harmonic rotation directions," the differentiated generation of two circular polarizations is directly achieved without additional polarization switching components. Considering the mutually exclusive physical structures of satellite communication antennas and cellular antennas, a first switch can be installed in the first parasitic module; the coupling state of the first parasitic module can be controlled by closing and opening the switch. Further, the first switch can disconnect the coupling state of the first harmonic mode, cutting off the path of potentially interfering harmonic signals when the cellular antenna is operating. This directly solves the electromagnetic interference problem caused by the structural conflict between the two types of antennas, ensuring that the cellular antenna is unaffected by harmonic signals from the satellite communication antenna while retaining the broadband performance of the satellite communication antenna when operating independently. This achieves compatible operation of the two mutually exclusive systems in the same device. As can be seen, this application avoids the spatial conflicts of traditional dual-polarized antennas with dual feeds and dual radiators by using a single feed source and dual parasitic modules, thus adapting to the compact layout of mobile terminal frames. Simultaneously, the feed module of this application can excite circular polarization in the operating frequency band corresponding to both the first and second parasitic modules, achieving dual-operating-frequency-band circular polarization and widening the antenna's operating frequency band. While ensuring antenna lightweighting, it enables concurrent dual satellite communication functions, allowing dual satellite communication to be used simultaneously, and effectively solves the compatibility problem between satellite antennas and cellular antennas, balancing the dual needs of performance expansion and interference avoidance. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the structure of a broadband satellite communication antenna disclosed in an embodiment of this application;

[0035] Figure 2 This is a schematic diagram of the structure of another broadband satellite communication antenna disclosed in an embodiment of this application;

[0036] Figure 3 This is a schematic diagram of yet another broadband satellite communication antenna disclosed in the embodiments of this application;

[0037] Figure 4 This is a schematic diagram of the current flow direction in a broadband satellite communication antenna disclosed in an embodiment of this application;

[0038] Figure 5 This is an example diagram showing the operating frequency band of a broadband satellite communication antenna disclosed in an embodiment of this application;

[0039] Figure 1 - Figure 3 The correspondence between component identification and figure reference numerals is shown below:

[0040] Frame 1, feed module 2, first parasitic module 3, second parasitic module 4, first switch 30, parasite 31, parasitic radiation arc 40, right angle structure 41, second switch 410. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] The broadband satellite communication antenna of this application will now be described in detail with reference to the accompanying drawings. It should be noted that the orientation of the structures shown in the drawings is set for ease of understanding and does not limit the orientation of the embodiments disclosed in actual implementation. Furthermore, the shape and size of the structure, whether as a whole or in part, shown in the drawings are not limited to the actual shape and size.

[0043] Next, combine Figure 1 This application provides a detailed description of the broadband satellite communication antenna.

[0044] See Figure 1 It can be seen that the broadband satellite communication antenna of this application may include a frame 1, a feed module 2, a first parasitic module 3 and a second parasitic module 4.

[0045] One end of the feed module 2 can be electrically connected to the feed point in the frame 1.

[0046] The other end of the feed module 2 can be grounded.

[0047] Specifically, the feed module 2 can be coupled to the ground through a grounding structure.

[0048] There is a gap between the first parasitic module 3 and the frame 1, and there is a gap between the second parasitic module 4 and the frame 1.

[0049] It should be noted that the gap between the first parasitic module 3 and the frame 1 and the gap between the second parasitic module 4 and the frame 1 are not the same gap.

[0050] The first parasitic module 3 and the second parasitic module 4 can be located on opposite sides of the feed module 2, such as... Figure 1 As shown, the first parasitic module 3 can be located on the left side of the feed module 2, and the second parasitic module 4 can be located on the right side of the feed module 2.

[0051] The feed module 2 can be used to generate target radiation signals.

[0052] The first parasitic module 3 can be used to couple and generate a first harmonic mode.

[0053] The first parasitic module 3 may be equipped with a first switch 30.

[0054] The first switch 30 can be used to control the on / off state of the coupling of the first parasitic module 3.

[0055] The second parasitic module 4 can be used to couple and generate a second resonant mode.

[0056] The first harmonic mode and the second harmonic mode can rotate in opposite directions.

[0057] The resonant frequencies of the first harmonic mode and the second harmonic mode are different.

[0058] The resonant frequency is also known as the resonance frequency.

[0059] The resonant frequency can be the frequency at which the imaginary part of the input impedance of the first parasitic module 3 is zero.

[0060] A resonant frequency can correspond to a frequency range, that is, a frequency range in which resonance occurs. The frequency corresponding to the strongest resonance point is the center frequency. The return loss characteristic at the center frequency point can be less than -20dB. It should be understood that, unless otherwise specified, the first harmonic mode of this application should be the fundamental mode resonance generated by the first parasitic module 3, or the lowest frequency resonance generated by the first parasitic module 3. Similarly, the second harmonic mode of this application should be the fundamental mode resonance generated by the second parasitic module 4, or the lowest frequency resonance generated by the second parasitic module 4.

[0061] The target radiated signal can generate the first circularly polarized radiation frequency band with the first harmonic mode.

[0062] The target radiation signal can generate a second circularly polarized radiation frequency band with the second harmonic mode.

[0063] The second circularly polarized radiation frequency band has the opposite rotation direction to the first circularly polarized radiation frequency band, and the operating frequency bands corresponding to the first and second circularly polarized radiation frequency bands are different.

[0064] As can be seen from the above technical solution, the broadband satellite communication antenna provided in this application may include a frame 1, a feed module 2, a first parasitic module 3, and a second parasitic module 4; the feed module 2 is used to generate target radiation signals; one end of the feed module 2 is connected to the frame 1, and the other end of the feed module 2 is grounded; there is a gap between the first parasitic module 3 and the frame 1, and there is a gap between the second parasitic module 4 and the frame 1; the first parasitic module 3 and the second parasitic module 4 are respectively located on both sides of the feed module 2; the first parasitic module 3 is used for... The first parasitic module 3 and the feed module 2 are coupled to generate a first harmonic mode, and the target radiated signal and the first harmonic mode generate a first circularly polarized radiation frequency band. The second parasitic module 4 is used to couple to generate a second resonant mode, and the target radiated signal and the second harmonic mode generate a second circularly polarized radiation frequency band. The first harmonic mode and the second harmonic mode have opposite rotation directions, and the second circularly polarized radiation frequency band has opposite rotation directions. Based on this, the first parasitic module 3 and the feed module 2 of this application can be combined to form one type of polarized antenna; the second parasitic module 4 and the feed module 2 can be combined to form a second type of polarized antenna. By reusing the feed module 2, the redundancy of antenna components is reduced. Compared with the traditional dual independent polarized antenna design that requires two complete sets of feed superimposed radiators, the number of components is less, directly reducing the overall size and weight of the antenna and meeting the lightweight requirements of mobile terminal antenna settings. The two parasitic modules are symmetrically distributed on both sides of the feed, ensuring that their coupling processes are independent and interference-free. Through the design of "harmonic rotation directions opposite", the differential generation of two circular polarizations is directly realized without additional polarization switching components. Considering the mutually exclusive physical structures of satellite communication antennas and cellular antennas, a first switch 30 can be provided in the first parasitic module 3. The coupling state of the first parasitic module 3 can be controlled by closing and opening the switch. Furthermore, the first switch 30 can disconnect the coupling state of the first harmonic mode, cutting off the path of potentially interfering harmonic signals when the cellular antenna is working. This directly solves the electromagnetic interference problem caused by the structural conflict between the two types of antennas, ensuring that the cellular antenna is not affected by harmonic signals from the satellite communication antenna while retaining the wideband performance of the satellite communication antenna when working independently. This achieves compatible operation of the two mutually exclusive systems in the same device. Therefore, this application can avoid the spatial conflict of traditional dual-polarized antennas with dual feeds and dual radiators by using a single feed and dual parasitic modules, adapting to the compact layout of mobile terminal frames. Simultaneously, the feed module 2 of this application can excite the circular polarization of the operating frequency band corresponding to the first parasitic module 3 and the operating frequency band corresponding to the second parasitic module 4, achieving dual-operating frequency band circular polarization and widening the antenna's operating frequency band.While ensuring the antenna is lightweight, it enables dual satellite communication functions to be used concurrently, allowing dual satellite communication functions to be used at the same time. It also effectively solves the compatibility problem between satellite antennas and cellular antennas, and takes into account both the needs of performance expansion and interference avoidance.

[0065] In some embodiments of this application, the feed module 2 can generally be an I-type structure, such as... Figure 1 As shown.

[0066] Figure 2 The feed is the feed source.

[0067] See Figure 2 It can be observed that one end of the feed in feed module 2 is electrically connected to frame 1, and the other end is grounded.

[0068] In some embodiments of this application, the first parasitic module 3 may present an L-shaped structure, such as... Figure 2 As shown.

[0069] Specifically, the vertical direction is the long segment, and the horizontal direction is the short segment.

[0070] Furthermore, the short segment of the first parasitic module 3 and the feed module 2 can form a right angle shape.

[0071] As can be seen from the above technical solution, this embodiment provides an optional structural approach for the first parasitic module 3. Through this approach, the coupling efficiency between the first harmonic mode coupled by the first parasitic module 3 and the target radiation signal coupled by the feed module 2 is effectively improved, thereby achieving the first circularly polarized radiation frequency band more stably.

[0072] In some embodiments of this application, a parasite 31 is provided on the vertical side of the first parasitic module 3.

[0073] The first switch 30 can be set on the horizontal side of the first parasitic module 3. Figure 2 As shown.

[0074] Specifically, the long segment of the first parasitic module 3 may be equipped with a parasite 31, and the short segment may be equipped with a first switch 30.

[0075] One end of the parasite 31 has a gap with the frame 1, and the parasite 31 is coupled to the feed module 2 through the gap;

[0076] One end of the first switch 30 is connected to the parasite 31, and the other end is grounded.

[0077] When the antenna is working normally, the signal current flows from the feed point along the antenna radiator.

[0078] The parasitic element 31 can, through corresponding gaps, couple out a current perpendicular to the antenna body, i.e., the first harmonic mode, thereby enhancing the gain of the horizontal or vertical polarization component. The target radiation signal generated by the feed module 2 and the first harmonic mode polarization amplitude generated by the first parasitic module 3 are equal and phase-differential by 90°. Therefore, the circularly polarized antenna formed by the feed module 2 and the first parasitic module 3 meets the requirements of a circularly polarized antenna for satellite antennas.

[0079] It is understandable that the current generated by the parasitic body 31 through the corresponding gap coupling flows successively through the parasitic body 31 and the first switch 30, and then flows to the ground, such as... Figure 4 As shown.

[0080] As can be seen from the above technical solution, this embodiment provides an optional configuration of the first parasitic module 3. Through this configuration, the parasite 31 can be configured to gain the polarization component, allowing the first parasitic module 3 and the feed module 2 to be combined to form one type of circularly polarized antenna of this application.

[0081] Furthermore, the first switch 30 can be an aperture tuning switch.

[0082] An aperture tuning switch can be used to prevent the first parasitic element from affecting other antennas in the mobile terminal when it is not in operation.

[0083] As can be seen from the above technical solution, this embodiment provides an optional switching device for the first parasitic module 3. Through this setting, the influence of the first parasitic module 3 on other antennas can be minimized, thereby improving the versatility of the first parasitic module 3 in this application.

[0084] In some embodiments of this application, the second parasitic module 4 may include a parasitic radiating arc and a right-angle structure 41, such as... Figure 2 As shown.

[0085] There is a gap between the parasitic radiating arc and the frame 1, and the parasitic radiating arc is coupled to the feed module 2 through the gap.

[0086] One end of the right-angle structure 41 is connected to the parasitic radiation arc, and the other end is grounded.

[0087] The parasitic radiation arc, structurally speaking, can couple a current perpendicular to the antenna body—the second harmonic mode—through corresponding gaps, thereby enhancing the gain of the horizontal or vertical polarization component. The target radiation signal generated by feed module 2 and the second harmonic mode polarization amplitude generated by the second parasitic module 4 are equal and phase-differential by 90°. Therefore, the circularly polarized antenna formed by feed module 2 and the second parasitic module 4 meets the requirements of a circularly polarized satellite antenna.

[0088] Since the parasitic radiation arc and the parasite 31 are located on opposite sides of the feed module 2, and the phase difference between the first harmonic mode and the second harmonic mode and the target radiation signal is 90°, the phase difference between the first harmonic mode and the second harmonic mode is 180°.

[0089] It is understandable that the current generated by the parasitic radiating arc through the corresponding gap coupling flows successively through the parasitic radiating arc and the right-angle structure 41, and then flows to the ground, as shown below. Figure 4 .

[0090] As can be seen from the above technical solution, this embodiment provides an optional configuration for the second parasitic module 4. Through this method, by setting the parasitic radiation arc and the horizontally longer, vertically shorter structure, the second harmonic mode generated by the second parasitic module 4 can be made to have a better amplitude equal to the target radiation signal and a phase difference of 90°.

[0091] In some embodiments of this application, the right-angle structure 41 can be configured as a right-angled broken line with a long conductor in the horizontal direction and a short conductor in the vertical direction, such as... Figure 2 As shown.

[0092] One end of the long conductor is connected to the parasitic radiation arc; the other end is connected to one end of the short conductor; and the other end of the short conductor is grounded.

[0093] As can be seen from the above technical solution, this embodiment provides an optional composition of the right-angle structure 41. Through the above method, the phase difference between the second harmonic mode and the target radiated signal can be made 90° by setting the length of the wires. The setup is relatively simple, improving the practicality and applicability of the right-angle structure 41.

[0094] Furthermore, to prevent the second parasitic module 4 from affecting other antennas, a second switch 410 can be provided on the longer segment of the right-angle structure 41, such as... Figure 3 As shown.

[0095] Specifically, the right-angle structure 41 can be a right-angle broken line with a second switch 410 in the horizontal direction and a short wire in the vertical direction.

[0096] One end of the second switch 410 can be connected to the parasitic radiation arc, and the other end of the second switch 410 can be connected to one end of a short wire, with the other end of the short wire grounded.

[0097] Furthermore, the second switch 410 can also be an aperture tuning switch to prevent the second parasitic module 4 from affecting other antennas in the mobile terminal when it is not in operation.

[0098] As can be seen from the above technical solution, this embodiment provides another optional configuration of the right-angle structure 41. By setting the second switch 410 on the right-angle structure 41, the influence of the second parasitic module 4 on other antennas within the mobile terminal can be reduced, further improving the practicality of the second parasitic module 4 and the applicability of this application.

[0099] In some embodiments of this application, to enable the mobile terminal to better provide satellite communication services, the operating frequency bands of the first harmonic mode and the second harmonic mode can be set, which is achieved collaboratively by the first parasitic module 3 and the second parasitic module 4. Specifically, the collaborative operation of the operating frequency bands of the first harmonic mode and the second harmonic mode has the following two optional schemes:

[0100] The first type

[0101] The first harmonic mode covers the operating frequency band of the satellite communication antenna. The second harmonic mode covers the receiving frequency band of short message satellite communication.

[0102] Specifically, the operating frequency of the first harmonic mode can be 2.49 GHz. The operating frequency band of the second harmonic mode covers 1.615 GHz and 1.98 GHz.

[0103] In this case, the operating frequency band of the broadband satellite communication antenna of this application can cover the operating frequency band of the satellite radio antenna and the operating frequency band of the satellite short message reception. At this time, the overall harmonics of the broadband satellite communication antenna of this application can exhibit a W-shape, such as... Figure 5 As shown.

[0104] The second type

[0105] The first harmonic mode can cover the receiving frequency band of short message satellite communication; the second resonant mode can cover the operating frequency band of satellite communication antenna.

[0106] At this point, the operating frequency of the second harmonic mode can be 2.49 GHz. The operating frequency band of the first harmonic mode covers 1.615 GHz and 1.98 GHz.

[0107] In this case, the operating frequency band of the broadband satellite communication antenna of this application can also cover the operating frequency band of the satellite intercom antenna and the operating frequency band of satellite short message reception. At this time, the overall harmonics of the broadband satellite communication antenna of this application can also be as follows: Figure 5 As shown.

[0108] As can be seen from the above technical solution, this embodiment provides two selectable operating frequency bands for the first harmonic mode and the second harmonic mode. Through the above method, the first parasitic module 3 and the second parasitic module 4 can work together to provide both satellite call functionality and satellite short message reception functionality for the mobile terminal.

[0109] The broadband satellite communication antenna of this application can be applied to antennas of types such as FPC, MDA, and LDS.

[0110] FPC stands for Flexible Printed Circuit Board. It uses a flexible substrate as a carrier and integrates radiating units through printed conductive lines. It is characterized by being flexible, thin, and lightweight, and can be adapted to the narrow or irregular installation space of consumer electronics and other devices.

[0111] The Chinese name for MDA can be metal spring antenna. It uses flexible metal springs such as stainless steel and beryllium copper as radiators. With the high radiation efficiency of the metal material and the elastic adaptability of the springs, it ensures the stability and reliability of signal transmission and reception in automotive electronics, industrial control equipment and some consumer electronics.

[0112] The Chinese name for LDS can be Laser Direct Molding. It refers to a core manufacturing process that first uses special plastics containing laser activators to make equipment structural components, then activates designated areas by laser irradiation, and finally forms conductive lines, i.e., antenna radiators, through chemical plating. This allows for the integration of antennas and structural components, significantly saving internal space and meeting the needs of thin, lightweight, and high-precision high-end consumer electronics antennas.

[0113] Finally, it should be noted that in this document, 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.

[0114] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0115] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. The various embodiments of this application can be combined with each other. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A broadband satellite communication antenna, characterized in that, It includes a border, a feed module, a first parasitic module, and a second parasitic module; The feed module has an I-shaped structure and is used to generate target radiation signals; One end of the feed module is connected to the frame, and the other end of the feed module is grounded; There is a gap between the first parasitic module and the frame, and there is a gap between the second parasitic module and the frame. The gap between the first parasitic module and the frame and the gap between the second parasitic module and the frame are not the same gap. The first parasitic module and the second parasitic module are located on both sides of the feed module, respectively; The first parasitic module has an L-shaped structure and is used to couple and generate a first harmonic mode. The target radiation signal and the first harmonic mode generate a first circularly polarized radiation frequency band. The first parasitic module has a parasite on its vertical side and a first switch on its horizontal side; There is a gap between one end of the parasite and the frame, and the parasite is coupled to the feed module through the gap; One end of the first switch is connected to the parasite, and the other end is grounded; The second parasitic module is used to couple and generate a second resonant mode. The target radiated signal and the second harmonic mode generate a second circularly polarized radiation frequency band. The first harmonic mode and the second harmonic mode have opposite rotation directions. The second circularly polarized radiation frequency band has opposite rotation directions to the first circularly polarized radiation frequency band. The operating frequency bands corresponding to the first circularly polarized radiation frequency band and the second circularly polarized radiation frequency band are different.

2. The broadband satellite communication antenna according to claim 1, characterized in that, The first switch is an aperture tuning switch.

3. The broadband satellite communication antenna according to claim 1, characterized in that, The second parasitic module includes parasitic radial arcs and right-angle structures; There is a gap between the parasitic radiating arc and the frame, and the parasitic radiating arc is coupled to the feed module through the gap; One end of the right-angled structure is connected to the parasitic radiation arc, and the other end is grounded.

4. The broadband satellite communication antenna according to claim 3, characterized in that, The right-angle structure is a right-angle broken line with a long conductor in the horizontal direction and a short conductor in the vertical direction; One end of the long conductor is connected to the parasitic radiation arc; One end of the short conductor is grounded.

5. The broadband satellite communication antenna according to claim 3, characterized in that, The right-angle structure is a right-angled broken line with a second switch in the horizontal direction and a short wire in the vertical direction; One end of the second switch is connected to the parasitic radiation arc; One end of the short conductor is grounded.

6. The broadband satellite communication antenna according to claim 1, characterized in that, The first harmonic mode covers the operating frequency band of the satellite communication antenna; the second resonant mode covers the receiving frequency band of short message satellite communication.

7. The broadband satellite communication antenna according to claim 1, characterized in that, The first harmonic mode covers the receiving frequency band of short message satellite communication; the second resonant mode covers the operating frequency band of the satellite communication antenna.

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