Satellite communication antenna and electronic device

Abstract

The present specification provides a satellite communication antenna and electronic equipment, the antenna comprises a first radiation branch and a parasitic unit, the parasitic unit is a ring branch, and at least part of the branch is close to the first radiation branch and is coupled, and the parasitic unit is connected to the ground through at least one ground point.The satellite communication antenna of the embodiment of the present specification forms circular polarization by using the coupling effect of the parasitic unit, greatly improves the antenna gain compared with linear polarization satellite antenna, and improves the actual experience of satellite communication.And the radiation direction of the satellite communication antenna is mainly towards the zenith region, so that the antenna efficiency is higher, the satellite searching and communication efficiency in the state of user handheld mobile phone is improved, and the user experience is improved.

Description

Technical Field

[0001] This specification relates to the field of radio frequency antenna technology, specifically to a satellite communication antenna and electronic device. Background Technology

[0002] With the development of satellite communication technology, more and more smartphones are beginning to support satellite communication functions, which can provide users with emergency external communication capabilities in scenarios without network coverage, such as in the wild, at sea, and in deserts.

[0003] Currently, mobile phones mainly use the top metal frame to implement satellite communication antennas. The performance of satellite communication antennas in related technologies is poor, resulting in poor satellite communication capabilities of mobile phones. Utility Model Content

[0004] In order to improve the performance of satellite communication antennas in electronic devices, embodiments of this specification provide a satellite communication antenna and an electronic device having the satellite communication antenna.

[0005] Firstly, this specification provides a satellite communication antenna, comprising:

[0006] A first radiating stub, wherein a first feed point is provided on the first radiating stub, the first feed point is connected to a first feed circuit, and the first feed circuit is used to excite the first radiating stub to generate a resonant signal in the satellite communication frequency band.

[0007] The parasitic unit is a ring-shaped branch, at least a portion of the branches of the parasitic unit are closely coupled to the first radiating branch, and the parasitic unit includes at least one grounding point connected to the floor.

[0008] In some embodiments, the phase difference between the coupling current generated on the parasitic unit and the current on the first radiating stub is a preset phase angle, so that the resonant signal forms a circularly polarized signal.

[0009] In some embodiments, the parasitic unit is a rectangular or rounded rectangular ring branch, the parasitic unit includes a first side, the first side is parallel to and close to the first radial branch, and the distance between the first side and the first radial branch is 0.1 mm to 5 mm.

[0010] In some implementations, the satellite communication frequency band includes the Tiantong satellite communication frequency band and / or the Beidou satellite communication frequency band.

[0011] Secondly, embodiments of this specification provide an electronic device including the satellite communication antenna described in any of the above embodiments.

[0012] In some embodiments, the electronic device further includes:

[0013] The frame is made of metal, and the first radiating branch is formed by the portion of the frame located at the top edge of the electronic device;

[0014] A camera module is provided near the top edge of the frame, and the parasitic unit is provided on the camera module.

[0015] In some embodiments, the first radiating branch is a branch suspended relative to the floor of the electronic device, a first end of the first radiating branch is coupled to a first parasitic branch through a first gap, a second end of the first radiating branch is coupled to a second radiating branch through a second gap, and the first parasitic branch and the second radiating branch are formed by a portion of the frame located at the top edge of the electronic device.

[0016] In some embodiments, the parasitic unit is a rectangular or rounded rectangular ring branch, the parasitic unit includes a first side, the first side is parallel to and close to the first radial branch, and the projection of the first side on the first radial branch covers the first gap.

[0017] In some embodiments, the first feed point on the first radiating branch is located at one end near the second gap.

[0018] In some embodiments, the second radiating stub is provided with a second feed point, which is connected to a second feed circuit. The second feed circuit is used to excite the second radiating stub to generate a resonant signal in the target frequency band.

[0019] The satellite communication antenna described in this specification includes a first radiating stub and a parasitic element. The parasitic element is a ring-shaped stub, and at least a portion of the stub is closely coupled to the first radiating stub. The parasitic element is connected to the ground through at least one grounding point. In this embodiment, the coupling effect of the parasitic element is used to form a circularly polarized satellite communication antenna, which greatly improves the antenna gain compared to a linearly polarized satellite antenna, thus enhancing the actual experience of satellite calls. Moreover, the radiation direction of the satellite communication antenna is mainly directed towards the zenith region, resulting in higher antenna efficiency and improving satellite search and communication efficiency when the user is holding a mobile phone, thereby enhancing the user experience. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments or technical solutions in the prior art of this specification, the accompanying drawings used in the description of the specific embodiments or prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this specification. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a satellite communication antenna in related technologies.

[0022] Figure 2 yes Figure 1 Radiation pattern of the antenna.

[0023] Figure 3 This is a schematic diagram of the structure of a satellite communication antenna in related technologies.

[0024] Figure 4 This is an exploded view of an electronic device in some embodiments of this specification.

[0025] Figure 5 This is a schematic diagram of the structure of a satellite communication antenna in some embodiments of this specification.

[0026] Figure 6 This is a schematic diagram of the structure of a satellite communication antenna in other embodiments of this specification.

[0027] Figure 7 This is a schematic diagram of the structure of an electronic device in some embodiments of this specification.

[0028] Figure 8 This is a schematic diagram of the structure of an electronic device in some embodiments of this specification. Detailed Implementation

[0029] The technical solutions of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this specification, not all of them. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this specification. Furthermore, the technical features involved in the different embodiments of this specification described below can be combined with each other as long as they do not conflict with each other.

[0030] Satellite communication refers to communication between ground-based wireless devices using satellites as relays. A satellite communication system consists of two parts: a satellite and ground equipment. It does not require ground base stations for relaying, and therefore has advantages such as a large communication range and being unaffected by geological disasters.

[0031] With the development of satellite communication technology, functions such as satellite short messages and satellite calls are becoming increasingly common in conventional consumer electronic devices. For example, some smartphones and wearable devices have begun to support satellite communication functions such as Tiantong calls and Beidou short messages.

[0032] Circular polarization is an antenna polarization performance characteristic. Because circularly polarized waves generated by a circularly polarized antenna can be received by linearly polarized antennas in any direction, and circularly polarized antennas can also receive incoming waves from any linearly polarized antenna, they possess excellent antenna performance. Therefore, signals transmitted from satellites to ground equipment commonly use circular polarization. Compared to linearly polarized antennas, the main advantage of circularly polarized antennas is that, with comparable antenna efficiency, the received satellite signal strength is improved by approximately 3 dB. Furthermore, it enhances the anti-interference capability between receiving equipment and satellite systems in complex environments.

[0033] Circularly polarized antennas can be divided into left-hand circular polarization (LHCP) and right-hand circular polarization (RHCP). For example, taking satellite communications such as Tiantong and Beidou as examples, the transmitting antennas of these satellites generally adopt left-hand circular polarization, which requires ground equipment to use the same left-hand circular polarized antennas to improve satellite communication performance.

[0034] In related technologies, satellite communication antennas for electronic devices are mainly frame antennas, that is, the metal frame of the electronic device is used as a radiator to transmit and receive satellite signals. At the same time, in order to improve satellite communication performance, the satellite antenna is mainly concentrated on the top of the device.

[0035] For example Figure 1 A schematic diagram of a satellite communication antenna for a smartphone in related technologies is shown. See [link / reference]. Figure 1 As shown, to ensure communication with and satellite acquisition from zenith satellites, the satellite communication antenna is typically positioned in the center of the top of the phone. This antenna is usually implemented using a suspended stub. Additionally, the top of the phone can also house other antennas such as satellite positioning antennas, Wi-Fi antennas, and cellular antennas. Figure 1 It is not shown in the text.

[0036] Taking the Tiantong antenna as an example, Figure 2 It shows Figure 1 The radiation pattern of the satellite communication antenna. In the Tiantong downlink band (approximately 2.2 GHz), the radiation pattern is generally oriented towards the zenith, the antenna efficiency is approximately -1.384 dB, the total gain is approximately 2.918 dBi, but the left-hand circular polarization gain is only -0.087 dB, and the polarization loss is approximately -3 dB.

[0037] It is evident that the satellite communication antennas in the relevant technologies do not possess circular polarization capabilities, but rather are linearly polarized antennas. Compared to circularly polarized antennas, the gain loss reaches -3dB. Therefore, the performance indicators of satellite communication antennas are poor, resulting in poor satellite communication performance and problems such as inability to search for satellites, disconnection, and packet loss.

[0038] In order to realize a circularly polarized satellite communication antenna Figure 3 This illustrates some solutions in the related technologies, in Figure 3 In this scheme, two vertical metal frames (11 and 12) are used as antenna radiators. Orthogonal currents i1 and i2 are generated on the two vertical frames by feeding. The two currents are perpendicular in direction and have a 90° phase difference. Circular polarization is achieved by orthogonally exciting circularly polarized waves in time and space.

[0039] While this method can achieve left-hand circular polarization for satellite communication, in mobile phones, the radiation pattern of a circularly polarized antenna implemented using the vertical bezel is not oriented towards the zenith, but rather primarily towards a direction perpendicular to the screen. This results in poor antenna gain for satellite communication when the user uses the phone in a normal posture, making it difficult to meet call performance requirements.

[0040] Based on this, the embodiments of this specification provide a satellite communication antenna and an electronic device having the satellite communication antenna, which aims to improve satellite communication performance by utilizing the coupling between parasitic elements and radiating branches, and generating circular polarization performance through the coupling current being orthogonal to the radiating current, and the radiation direction of the circularly polarized antenna being towards the zenith.

[0041] In the embodiments of this specification, the electronic device can be any type of device suitable for implementation. It is understood that in the antenna system of the embodiments of this specification, the antenna radiator is mainly realized by the frame of the electronic device. Therefore, the electronic device can be any device with a metal frame, such as a smartphone, tablet computer, wearable device, etc. This specification does not limit this.

[0042] In some implementations, the electronic device is, for example, a smartphone. Figure 4 The structure of a smartphone in some embodiments of this specification is shown. The smartphone includes a frame 100, a screen assembly 200, and a back panel 300. The frame 100 serves as the main support structure of the smartphone and is generally made of metal. Various electrical and structural components of the smartphone can be arranged on the frame 100. For example, one side of the frame 100 is used to mount the screen assembly 200 to form the front of the smartphone, and the other side of the frame 100 is used to mount the back panel 300 to form the back of the smartphone.

[0043] The frame 100 includes a support portion 120 and a bezel 110 formed around the edge of the support portion 120. After the screen assembly 200 and the back panel 300 are encapsulated, the bezel 110 serves as the side bezel of the mobile phone. The frame 100 is generally made of metal materials such as aluminum alloy or stainless steel, so the bezel 110 can serve as the metal radiator of the mobile phone antenna system. By creating a slit in the bezel 110 and connecting the corresponding radio frequency circuit, signal communication of various frequency bands of the mobile phone can be achieved. The support portion 120 serves as the ground plane (GND) of the antenna system. The ground plane is a zero-potential element of the electrical system. In the antenna system, the antenna radiator is grounded by connecting to the ground plane.

[0044] In the embodiments described in this specification, the frame 110 of the electronic device is a rectangular structure. For ease of understanding and explanation, taking the rear view of the electronic device as an example, the upper side of the frame 110 is defined as the top side, the lower side as the bottom side, the side with the side button on the left is the first side, and the right side is the second side. The following will use this definition and describe it in conjunction with the accompanying drawings.

[0045] Of course, smartphones can also include other electrical structures, as detailed in this manual. Figure 4 The embodiments are not shown. For example, a circuit board, various sensors, batteries, etc. are usually disposed between the support portion 120 of the frame 100 and the back plate 300. Those skilled in the art will understand this, and it will not be described in detail here.

[0046] Secondly, for ease of understanding and explanation, some of the nouns and technical terms that appear in the embodiments below this specification are explained here.

[0047] Radiator / Radiating Stub: This is the component in an antenna used to receive and transmit electromagnetic radiation. Radiators / radiating stubs are typically made of metal. The shape and size of the radiator / radiating stub vary depending on the antenna type and system. In some cases, the narrow definition of "antenna" refers to the radiator / radiating stub; that is, the radiator / radiating stub can be directly called an antenna. In a broader sense, however, the radiator / radiating stub represents the part of the antenna used for transmitting and receiving electromagnetic waves. Besides the radiator / radiating stub, an antenna often includes electrical components such as feed circuits and matching circuits.

[0048] Feed circuitry: This is a combination of all circuitry used for receiving and transmitting radio frequency (RF) signals. Feed circuitry may include transceivers and RF front-end circuitry; in some implementations, it may be an RF chip.

[0049] Feed point: This refers to the location on the radiator / radiating stub where it is electrically connected to the feed circuit. In some scenarios, the feed point on the radiator / radiating stub is also called the "top frame point," which can be understood as the connection point between the feed circuit and the metal frame.

[0050] Suspended: This refers to a situation where there is no rigid structural connection between the radiator / radiating branch and the floor, thus the radiator / radiating branch is suspended relative to the floor. However, it is understandable that a suspended radiator / radiating branch can still be electrically connected to provide power or grounding.

[0051] Resonance: refers to the resonant frequency generated by the antenna. The resonant frequency can have a frequency range, that is, the frequency range in which the current resonates in the radiator / radiating stub. The frequency corresponding to the strongest resonance point is the center point of the resonant frequency, also called the center frequency point. It can be understood that the first resonance, second resonance, etc. in the embodiments of this specification are the radio frequency band generated by the antenna system.

[0052] Antenna radiation pattern: refers to the graph showing the relative field strength of the antenna radiation field as a function of direction at a certain distance from the antenna (far field). It is usually represented by two mutually perpendicular planar radiation patterns passing through the direction of maximum antenna radiation.

[0053] Coupling: refers to a connection method in which two components do not directly contact each other, but their electric or magnetic fields influence each other when energized, thus allowing them to transfer energy to each other.

[0054] Parasitic stubs are components that are not directly connected to radiators / radiation stubs, but are coupled through a medium (such as air). Parasitic stubs are generally passive components, meaning that they are not connected to a power supply, but generate induced current through coupling with active radiators / radiation stubs.

[0055] Circular polarization is an antenna polarization characteristic. Circularly polarized antennas can be achieved in two ways: one is by using a rotating ring current with an effective circumference that is an integer multiple of the wavelength to form circular polarization; the second is by using two line currents of equal amplitude and orthogonality with a 90° phase difference to generate circular polarization. The implementation in this specification uses the second method to achieve circular polarization of the antenna.

[0056] Figure 5 This specification shows a schematic diagram of the satellite communication antenna of an electronic device in some embodiments. The following is a description of its structure in conjunction with... Figure 5 This manual explains the structure and principle of the antenna system.

[0057] See Figure 5 As shown, in some embodiments, the satellite communication antenna exemplified in this specification includes a first radiating stub 400 and a parasitic element 500.

[0058] As described above, in the application scenario of electronic devices, the first radiating branch 400 can be formed by creating a gap in the frame 110 of the electronic device, that is, the first radiating branch 400 can be part of the frame 110. In some embodiments, the first radiating branch 400 can be a suspended branch, that is, there is no rigid structural connection between the first radiating branch 400 and the floor.

[0059] In the embodiments described in this specification, the first radiating stub 400 is used to realize the radiating stub of the satellite communication antenna. Therefore, the stub length of the first radiating stub 400 can be selected according to specific frequency band requirements, and this specification does not impose specific limitations on it. For example, in some embodiments, the satellite communication antenna formed by the first radiating stub 400 can be used as a Tiantong satellite communication antenna, a Beidou satellite communication antenna, or a Xingwang satellite communication antenna, etc., and this specification does not impose any limitations on it.

[0060] A first feed point a is provided on the first radiating stub 400. The function of the first feed point a is to electrically connect to the first feed circuit K1. The first feed circuit K1 refers to the radio frequency source of the satellite communication antenna, which may include various active or passive devices such as radio frequency transceivers, power amplifiers, modems, and matching circuits. In the embodiments of this specification, a resonant current can be excited on the first radiating stub 400 through the first feed circuit K1, thereby realizing the transmission and reception of resonant signal waves according to the principle of electromagnetic induction. For example, in the embodiments of this specification, the first feed circuit K1 can excite the first radiating stub 400 to generate a resonant signal in the satellite communication frequency band.

[0061] In some embodiments, the first feed point a can be located at one end of the first radiating stub 400, that is, the first feed point a is located near one end of the first radiating stub 400. This has the advantage of exciting the entire radiating stub to generate a current in the same direction, making it easier to generate coupling current on the parasitic unit 500. Figure 5 In the example, the first feed point a is located near the right end of the first radiating branch 400. In other implementation examples, the first feed point a may also be located near the left end of the first radiating branch 400. This specification will not elaborate further on this.

[0062] As mentioned above, the resonant current of the first radiating stub 400 alone can only generate linearly polarized satellite communication signals. Therefore, in this embodiment, in order to realize a circularly polarized satellite communication antenna, a parasitic unit 500 is coupled to the first radiating stub 400. Furthermore, the parasitic unit 500 generates a coupling current due to the electromagnetic coupling effect. The phase difference between the coupling current and the current on the first radiating stub is configured as a preset phase angle, which can be 90° or close to 90°. Thus, according to the aforementioned circular polarization principle, a circularly polarized antenna can be formed by two orthogonal or approximately orthogonal currents.

[0063] The parasitic unit 500 is a ring-shaped radial branch, meaning that the parasitic unit 500 is a ring-shaped structure formed by radial branches connected end to end. For example Figure 5 In the example, parasitic unit 500 is a rectangular annular radial branch.

[0064] It is worth noting that the ring structure of the parasitic unit 500 is not limited to Figure 5 The rectangle shown can also be other ring-shaped structures, such as circular rings, rounded rectangular rings, oblong rings, etc. For example... Figure 6 In example (a), the parasitic unit 500 is a rounded rectangular ring. Figure 6 The parasitic unit 500 in example (b) is an elongated oval ring, but this specification does not limit it.

[0065] In this embodiment of the specification, at least a portion of the branches of the parasitic unit 500 are coupled close to the first radiating branch 400, and the parasitic unit 500 includes at least one grounding point, each grounding point being connected to the ground plane (GND) of the electronic device.

[0066] by Figure 5 As shown in the example, the parasitic unit 500 is a rectangular ring structure, which includes four sides. The side that is closely coupled to the first radial branch 400 is defined as the first side 510. That is, in Figure 5 In the example, the upper side of the parasitic unit 500 is the first side 510.

[0067] In the embodiments described in this specification, at least a portion of the branches of the parasitic unit 500 (such as the first side 510) are coupled close to the first radiating branch 400. Thus, when a resonant current is excited on the first radiating branch 400, a coupling current will be generated on the parasitic unit 500 coupled to the first radiating branch 400 due to the electromagnetic coupling effect.

[0068] For example Figure 5 In the example, the first radiating stub 400 generates a resonant current i1 in the direction indicated by the arrow in the figure due to the excitation of the first feed circuit K1, and a coupling current ic in the same direction is generated on the first side 510. Since the parasitic unit 500 is a ring structure, theoretically, the coupling current ic generated on the first side 510 will form a current loop, and the ring current will generate a current component i2 perpendicular to the plane where the parasitic unit 500 is located in space.

[0069] exist Figure 5 In the example, the direction of the current component i2 is perpendicular to the paper and outwards, that is, perpendicular to the plane where the parasitic unit 500 is located. Therefore, the current component i2 is also perpendicular to the resonant current i1 on the first radiating branch 400, thereby forming the two orthogonal currents i1 and i2 required for circular polarization.

[0070] As mentioned above, circular polarization requires two orthogonal currents i1 and i2 with equal amplitude and a 90° phase difference. Therefore, in some embodiments, the amplitude of the current component i2 can be adjusted by regulating the shape and size of the parasitic unit 500 and the coupling effect between the parasitic unit 500 and the first radiating branch 400.

[0071] For example, in some implementations, see Figure 3 As shown, the distance between the first side 510 of the parasitic unit 500 and the first radiating stub 400 is d. The closer the distance d, the stronger the coupling effect between the two, and thus the higher the amplitude of the current component i2. Therefore, the distance d between the first side 510 and the first radiating stub 400 can be reasonably set. For example, in some embodiments, the value of d ranges from 0.1 mm to 5 mm. In one example, d = 2 mm.

[0072] For example, in other embodiments, it is understood that the longer the length of the branch coupling between the parasitic unit 500 and the first radiating branch 400, the stronger the coupling effect between them, and thus the higher the amplitude of the current component i2. Therefore, the length of the branch coupling between the parasitic unit 500 and the first radiating branch 400 can be increased, for example by using... Figure 6 The oblong structure shown in (b) or the length of the first side 510 is extended.

[0073] Of course, those skilled in the art will understand that the coupling effect between the parasitic unit 500 and the first radiating branch 400 can be changed in other ways, and is not limited to the above examples. This specification will not elaborate on this further.

[0074] By adjusting the coupling effect between the parasitic unit 500 and the first radiating branch 400 through any of the above embodiments, the current component i2 of the coupling current generated on the parasitic unit 500 can be made to have the same or similar amplitude as the resonant current i1.

[0075] Meanwhile, in order to ensure that the phase difference between the current component i2 and the resonant current i1 is maintained at 90°, one or more grounding points can be set on the parasitic unit 500, and the grounding point can be connected to the grounding point. Thus, the coupling current on the parasitic unit 500 can return to the ground at the grounding point. By changing the current characteristics of the parasitic unit 500, the current phase can be adjusted so that the coupling current on the parasitic unit 500 and the resonant current on the first radiating branch 400 have a 90° phase difference.

[0076] For example, in some embodiments, given the structure of the first radiating branch 400 and the parasitic unit 500, multiple grounding points can be distributed on the parasitic unit 500, each grounding point being connected to the ground via a switch. Then, the phase of the coupling current under different switch combinations is simulated using simulation software, thereby determining the number and location of grounding points when the coupling current has a 90° phase difference with the resonant current.

[0077] For example Figure 5 In the example, the parasitic unit 500 has four grounding points, D1 to D4. Grounding point D1 is located on the bottom edge, grounding point D2 on the right side, grounding point D3 on the first side, and grounding point D4 on the left side. It can be understood that grounding points D1 to D4 are connected to the floor of the electronic device, for example, as described above. Figure 4 Taking a mobile phone as an example, the floor is the load-bearing part 120.

[0078] Of course, those skilled in the art will understand that the number and location of grounding points on the parasitic unit 500 are not limited to the examples in this specification. Those skilled in the art can undoubtedly implement more layout methods based on the principles described in this specification, which cannot be exhaustively listed in this specification, and therefore will not be elaborated further.

[0079] As can be seen from the above, in the embodiments of this specification, the first radiating branch 400 generates... Figure 3 The resonant current i1 shown in the diagram simultaneously generates a current component i2 perpendicular to the plane containing the parasitic unit 500. Furthermore, the aforementioned structure ensures that the orthogonal currents i1 and i2 have equal amplitude and a 90° phase difference, thus enabling the circular polarization performance required for a satellite communication antenna.

[0080] Moreover, in comparison Figure 3 In the related technical solutions shown in this specification, the orthogonal currents i1 and i2 are not parallel to the plane where the mobile phone screen is located. Therefore, the circularly polarized radiation direction formed should be upward in the direction shown in the figure. Thus, when applied in a mobile phone scenario, better circularly polarized radiation performance towards the zenith can be achieved.

[0081] by Figure 5 Taking the antenna structure shown as an example, Figure 6 It shows Figure 5 The radiation pattern of a satellite communication antenna used in a mobile phone. (Comparison) Figure 2 and Figure 6Similarly, in the 2.2GHz downlink band of the Tiantong antenna, in the embodiment described in this specification, the radiation direction is entirely towards the zenith, the antenna efficiency reaches -1.294dB, the total gain is 2.156dBi, and the left-hand circular polarization gain reaches 1.774dB, with a polarization loss of approximately -0.4dB. Therefore, the satellite communication antenna in this embodiment has excellent left-hand circular polarization performance, lower polarization loss, and a radiation direction towards the zenith region, with an overall antenna gain significantly higher than... Figure 2 The linear polarization scheme in the related technology shown.

[0082] The structure and principle of the satellite communication antenna described in this specification have been explained above. The application of the satellite communication antenna in electronic devices will be explained below.

[0083] See Figure 5 As shown, taking a smartphone as an example, the first radiating stub 400 of the satellite communication antenna can be formed using the top bezel 110 of the phone. The parasitic element 500 needs to be positioned close to the first radiating stub 400. Therefore, the following design schemes can be provided in the phone:

[0084] Option 1: A parasitic unit 500 can be set on the motherboard of the mobile phone. After the motherboard is assembled, the parasitic unit 500 can be coupled with the first radiating branch 400 to form the satellite communication antenna mentioned above.

[0085] Option 2: A parasitic unit 500 can be set on the inside of the back panel of the mobile phone. After the back panel is assembled, the parasitic unit 500 can be coupled with the first radiating branch 400 to form the satellite communication antenna mentioned above.

[0086] Option 3: The parasitic unit 500 can be embedded in the back panel of the mobile phone or set on the outside of the back panel. After the back panel is assembled, the parasitic unit 500 can be coupled with the first radiating branch 400 to form the satellite communication antenna mentioned above.

[0087] In Option 1, signal interference from various electrical components on the motherboard needs to be considered. Furthermore, the high integration of the motherboard makes manufacturing difficult and costly. Additionally, manufacturing and assembly errors on the motherboard can affect antenna performance, making antenna tuning difficult. In Option 2, the added parasitic unit 500 increases the thickness of the phone assembly, making space stacking more challenging. In Option 3, the parasitic unit 500 needs to be manufactured separately on the backplate, increasing both the manufacturing difficulty and cost of the backplate, and affecting its structural rigidity and appearance.

[0088] Based on this, in the electronic device provided in this specification, considering that there is a large thickness and horizontal space in the current mobile phone rear camera module, and that the metal parasitic unit 500 can also be used as a decorative part of the camera module (such as a camera DECO), therefore, in some embodiments, the parasitic unit can be set in the mobile phone rear camera module, which will be described in detail below.

[0089] Figure 7 This specification shows a rear view of the electronic device in some embodiments. The following is a detailed description in conjunction with... Figure 7 Please provide an explanation.

[0090] See Figure 7 As shown, in some embodiments, in the satellite communication antenna of the electronic device, the first radiating branch 400 is formed by opening a slit in the upper frame of the electronic device. Specifically, the upper frame of the electronic device has a first slit F1 and a second slit F2, thereby dividing the upper frame into a first parasitic branch 410, a first radiating branch 400, and a second radiating branch 420.

[0091] One end of the first radial branch 400 is coupled to one end of the first parasitic branch 410 through a first gap F1, and the other end of the first parasitic branch 410 is connected to the floor through a rigid rib structure. The other end of the first radial branch 400 is coupled to one end of the second radial branch 420 through a second gap F2, and the other end of the second radial branch 420 is connected to the floor through a rigid rib structure. In the embodiment of this specification, the first radial branch 400 is a suspended branch, that is, there is no rigid structural connection between the first radial branch 400 and the floor.

[0092] A first feed point a is provided on the first radiating branch 400. Figure 7 In the example, the first feed point a is positioned close to the second gap F2 to allow for better current coupling. The first feed point a is connected to the first feed circuit K1, which is used to excite the first radiating stub 400 to generate a resonant current, thereby generating a resonant signal in the satellite communication frequency band. The satellite communication frequency band includes, but is not limited to, the uplink and downlink frequency bands of satellite communication such as Tiantong, Beidou, and Xingwang.

[0093] In the embodiments described in this specification, the electronic device is provided with a rear-mounted camera module 700. The camera module 700 is generally located at the top of the back of the mobile phone, for example, in the upper left or upper right corner of the back of the mobile phone, or centered at the top of the back of the mobile phone. Therefore, it is possible to place the parasitic unit 500 in the camera module 700.

[0094] For example Figure 7In the example, the camera module 700 is located in the upper corner of the phone, near the top edge of the electronic device. The parasitic unit 500 can be disposed within the camera module 700; for example, in one example, the parasitic unit 500 can be disposed on the decorative panel (also called the camera DECO) of the camera module 700, thus the metallic parasitic unit 500 can also form a decorative component of the camera module 700. Simultaneously, the parasitic unit 500 can also be coupled to the first radiating stub 400 to form the circularly polarized satellite communication antenna described above.

[0095] For example Figure 8 In the example, when the camera module 700 is centered at the top of the phone, the parasitic unit 500 can be directly coupled to the first radiating branch 400, thus having good coupling performance. The structure of the satellite communication antenna can be referred to the aforementioned implementation method.

[0096] However, in most mobile phones, the camera module 700 is not centered, for example... Figure 7 In the example, because the camera module 700 is located in the upper left corner, the first side 510 of the parasitic unit 500 is not perfectly aligned with the first radial branch 400. For example Figure 7 In the scenario shown, the projection of the first side 510 of the parasitic unit 500 onto the first radiating stub 400 covers the first gap F1, meaning the first side 510 and the first radiating stub 400 are misaligned. In this case, theoretically, a usable left-hand circularly polarized satellite communication frequency band can still be generated, although the circular polarization performance is slightly reduced.

[0097] To further ensure Figure 7 In some embodiments, the circular polarization performance of the satellite communication antenna is improved by adding a first parasitic stub 410 to the satellite communication antenna. The first parasitic stub 410 is coupled to the first radiating stub 400 through a first gap F1. Due to the electromagnetic coupling effect, the resonant current i1 on the first radiating stub 400 is also coupled to the first parasitic stub 410, which is equivalent to widening the effective electrical length of the first radiating stub 400. This allows the entire first side 510 of the parasitic unit 400 to generate coupling current, improving the coupling effect of the parasitic unit 400. Therefore, according to the aforementioned circular polarization principle, the circular polarization performance of the satellite communication antenna can be improved.

[0098] In some embodiments, the top bezel of the electronic device further includes a second radiating stub 420. One end of the second radiating stub 420 is coupled to one end of the first radiating stub 400 through a second gap F2, and the other end is connected to the floor through a rigid rib. The second radiating stub 420 is provided with a second feed point b, which is used to connect to a second feed circuit K2. The second feed circuit K2 is used to excite the second radiating stub 420 to generate a resonant signal in a target frequency band, including but not limited to cellular frequency bands, satellite positioning frequency bands, and WiFi frequency bands.

[0099] As described above, in this embodiment, the parasitic unit's coupling effect forms a left-handed circularly polarized satellite communication antenna, which significantly improves antenna gain compared to a linearly polarized satellite antenna, enhancing the actual experience of satellite calls. Furthermore, the antenna's radiation direction is primarily towards the zenith region, resulting in higher antenna efficiency and improved satellite search and communication efficiency when the user is holding a mobile phone, thus enhancing the user experience. Additionally, the parasitic unit is integrated into the camera module, making design and implementation simple and easy to implement.

[0100] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the embodiments. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all embodiments here. However, obvious variations or modifications derived therefrom remain within the scope of protection created by this specification.

Claims

1. A satellite communication antenna, characterized in that, include: A first radiating stub, wherein a first feed point is provided on the first radiating stub, the first feed point is connected to a first feed circuit, and the first feed circuit is used to excite the first radiating stub to generate a resonant signal in the satellite communication frequency band. The parasitic unit is a ring-shaped branch, at least a portion of the branches of the parasitic unit are closely coupled to the first radiating branch, and the parasitic unit includes at least one grounding point connected to the floor.

2. The antenna according to claim 1, characterized in that, The phase difference between the coupling current generated on the parasitic unit and the current on the first radiating stub is a preset phase angle, so that the resonant signal forms a circularly polarized signal.

3. The antenna according to claim 1, characterized in that, The parasitic unit is a rectangular or rounded rectangular ring branch. The parasitic unit includes a first side, which is parallel to and close to the first radial branch. The distance between the first side and the first radial branch is 0.1 mm to 5 mm.

4. The antenna according to claim 1, characterized in that, The satellite communication frequency bands include the Tiantong satellite communication frequency band and / or the Beidou satellite communication frequency band.

5. An electronic device, characterized in that, Includes the satellite communication antenna according to any one of claims 1 to 4.

6. The electronic device according to claim 5, characterized in that, Also includes: The frame is made of metal, and the first radiating branch is formed by the portion of the frame located at the top edge of the electronic device; A camera module is provided near the top edge of the frame, and the parasitic unit is provided on the camera module.

7. The electronic device according to claim 6, characterized in that, The first radiating branch is a branch suspended relative to the floor of the electronic device. The first end of the first radiating branch is coupled to a first parasitic branch through a first gap, and the second end of the first radiating branch is coupled to a second radiating branch through a second gap. The first parasitic branch and the second radiating branch are formed by a portion of the frame located at the top edge of the electronic device.

8. The electronic device according to claim 7, characterized in that, The parasitic unit is a rectangular or rounded rectangular ring branch. The parasitic unit includes a first side, which is parallel to and close to the first radial branch. The projection of the first side onto the first radial branch covers the first gap.

9. The electronic device according to claim 7 or 8, characterized in that, The first feed point on the first radiating branch is located at one end near the second gap.

10. The electronic device according to claim 7, characterized in that, The second radiating stub is provided with a second feed point, which is connected to a second feed circuit. The second feed circuit is used to excite the second radiating stub to generate a resonant signal in the target frequency band.

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