Antenna and satellite mobile terminal

Abstract

The application relates to the technical field of communication equipment, in particular to an antenna and a satellite mobile terminal. The antenna comprises a reflecting plate, an antenna plate, a high-frequency vibrator and a low-frequency vibrator. The reflecting plate has a first plate and a second plate which are connected in a right angle or a circular arc. The antenna plate has a third plate and a fourth plate which are connected in a right angle or a circular arc. The first side edge of the first plate is connected with the second side edge of the third plate, and an opening is formed between the third side edge of the second plate and the fourth side edge of the fourth plate. The high-frequency vibrator is arranged along the length direction of the fourth plate and fixed thereon. The middle part of the high-frequency vibrator is provided with a first groove. The low-frequency vibrator is arranged along the length direction of the third plate and fixed thereon. The middle part of the low-frequency vibrator is provided with a second groove. The low-frequency vibrator is connected with the output feeder of the satellite mobile terminal. According to the application, the high-frequency vibrator and the low-frequency vibrator are arranged in two planes which are perpendicular to each other, so that the volume of the antenna is reduced. The grooves arranged in the middle parts of the two vibrators can expand the bandwidth. The reflecting plate is arranged to realize directional radiation.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of communication equipment, in particular to an antenna and a satellite mobile terminal. BACKGROUND

[0002] The antenna is an important radio equipment for transmitting and receiving electromagnetic waves. With the rapid development of mobile satellite communication technology, satellite communication has become a future 6G development direction. Therefore, there is an urgent need for handheld terminal equipment with small size, convenient carrying, high sensitivity and high stability.

[0003] Because the geosynchronous satellite is relatively far from the ground, the satellite signal is weak when reaching the ground. In order to receive the satellite signal, the ground satellite mobile terminal requires that the antenna has high efficiency and directional radiation with sufficient gain, so as to communicate with the satellite in an outdoor unobstructed environment. The antennas of the mobile satellite communication terminals on the market are basically columnar 4-arm spiral antennas, which are large in size and externally mounted.

[0004] At present, an antenna utilizes a reflector, a radiator and a director to form a Yagi antenna, which effectively improves the radiation efficiency of the satellite mobile terminal. When the director plate is attached to the outer surface of the terminal body, the reflector is located between the radiator and the director. At this time, the director loses its effectiveness, and the radiator evolves into a half-wave resonator antenna, which is a lobe-like omnidirectional antenna, so that the satellite mobile terminal still remains in a matching state and maintains better radiation effect in a common use scenario.

[0005] However, the above-mentioned antenna is still externally mounted and cannot solve the problems of large size and inconvenient carrying. The main factors that the satellite terminal antenna cannot be internally mounted are as follows: 1. The satellite mobile terminal has difficulty in designing a directional radiation antenna due to size limitation. 2. The satellite mobile terminal has many internal devices, and the environment around the antenna is complex, so the antenna efficiency is low. 3. At present, the reference ground of the internal antenna of the mobile terminal is the ground of the terminal, which has the advantages of greatly reducing the size of the antenna and the disadvantage that the surrounding environment of the reference ground has a great influence, especially when the handheld terminal is in close contact with the face during communication, the efficiency will decrease greatly.

[0006] Therefore, there is an urgent need for an antenna and a satellite mobile terminal to solve the problem of internally mounting the antenna in the satellite mobile terminal while ensuring the communication effect. SUMMARY

[0007] Therefore, the technical problem to be solved by the application is to provide an antenna to solve the problem of internally mounting the antenna in the satellite mobile terminal while ensuring the communication effect.

[0008] The technical scheme adopted by the application to solve the above technical problem is as follows:

[0009] According to one aspect of the present application, there is provided an antenna for a satellite mobile terminal, the antenna comprising a reflection plate having a first plate and a second plate connected to each other perpendicularly or in a circular arc, an antenna plate having a third plate and a fourth plate connected to each other perpendicularly or in a circular arc, the first plate corresponding to a first side edge of a length side and the third plate corresponding to a second side edge of a length side are connected to each other and form an opening between a third side edge of a length side of the second plate and a fourth side edge of a length side of the fourth plate, a high frequency vibrator disposed along a length direction of the fourth plate and fixed to the fourth plate, the high frequency vibrator having a first groove in a middle portion thereof, and a low frequency vibrator disposed along a length direction of the third plate and fixed to the third plate, the low frequency vibrator having a second groove in a middle portion thereof, the low frequency vibrator being connected to an output feed line of the satellite mobile terminal.

[0010] In one embodiment, the antenna is disposed in a first accommodating space corresponding to a top end of the satellite mobile terminal.

[0011] In one embodiment, the antenna is disposed symmetrically along a transverse central axis of the satellite mobile terminal.

[0012] In one embodiment, the high frequency vibrator is disposed on a first end surface of the fourth plate away from the first plate, and the low frequency vibrator is disposed on a second end surface of the third plate away from the second plate.

[0013] In one embodiment, the high frequency vibrator and the low frequency vibrator are disposed transversely to the satellite mobile terminal and symmetrically along a transverse central axis of the satellite mobile terminal. Terminal In one embodiment, the high frequency vibrator and the low frequency vibrator are disposed symmetrically along a transverse central axis of the satellite mobile terminal.

[0014] In one embodiment, a third groove is formed in a middle portion of the first side edge of the first plate connected to the third plate.

[0015] In one embodiment, the second plate of the reflection plate is disposed close to a screen side of the satellite mobile terminal, and the third plate of the antenna plate is disposed away from the screen side of the satellite mobile terminal.

[0016] In one embodiment, the antenna further comprises a balun, an input end of the balun being connected to the output feed line of the satellite mobile terminal, and an output end of the balun being connected to the low frequency vibrator.

[0017] In one embodiment, the output feed line passes through the third groove and has a spacing distance between the output feed line and the first plate.

[0018] The application also provides a satellite mobile terminal comprising the antenna of any one of the above.

[0019] Compared with the prior art, the antenna provided by the application can greatly reduce the volume of the antenna by arranging the high-frequency oscillator and the low-frequency oscillator on the third plate and the fourth plate which are connected perpendicularly to each other, so that the high-frequency oscillator and the low-frequency oscillator are combined to resonate at two center frequencies of high frequency and low frequency, and the two oscillators are in two orthogonal planes. The first groove and the second groove are arranged in the middle of the high-frequency oscillator and the low-frequency oscillator respectively, and the width and the length of the groove are adjusted to achieve the effect of expanding the bandwidth. In addition, the L-shaped reflecting plate is added to direct the antenna radiation direction to the upper side outside the human body, so as to realize directional radiation and improve the gain of the antenna pointing to the sky direction. Finally, the antenna is built into the satellite mobile terminal while ensuring the communication effect. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 A structural schematic diagram of an antenna provided by an embodiment of the application.

[0021] Figure 2 A structural schematic diagram of an antenna provided by an embodiment of the application installed in a satellite mobile terminal.

[0022] Figure 3 An enlarged structural schematic diagram of an antenna provided by an embodiment of the application installed in a satellite mobile terminal at A.

[0023] Figure 4 A structural schematic diagram of a reflecting plate of an antenna provided by an embodiment of the application.

[0024] Figure 5 A structural schematic diagram of a balun connected to an output feed line of a satellite mobile terminal and a low-frequency oscillator provided by an embodiment of the application.

[0025] Figure 6 A standing wave diagram of an antenna provided by an embodiment of the application.

[0026] Figure 7 A high-frequency radiation pattern of an antenna provided by an embodiment of the application.

[0027] Figure 8 A low-frequency radiation pattern of an antenna provided by an embodiment of the application. DETAILED DESCRIPTION

[0028] In order to make the technical problems, technical solutions and beneficial effects of the application more clear, explicit and understandable, the application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the application and do not limit the application.

[0029] Please see Figure 1 and Figure 2 , Figure 1 A structural schematic diagram of an antenna provided by an embodiment of the present application. Figure 2 A structural schematic diagram of an antenna provided by an embodiment of the present application installed in a satellite mobile terminal.

[0030] The antenna 1 is used in a satellite mobile terminal, which comprises a reflection plate with an L-shaped cross section, an antenna plate with an inverted L-shaped cross section, a high-frequency vibrator 103 and a low-frequency vibrator 104. The reflection plate has a first plate 102 and a second plate 101 which are perpendicular to each other or connected by a circular arc. The antenna plate has a third plate 110 and a fourth plate 108 which are perpendicular to each other or connected by a circular arc. The first plate 102 corresponds to a first side edge of a length side, and the third plate 110 corresponds to a second side edge of a length side. The first side edge and the second side edge are connected and form an opening between a third side edge of a length side of the second plate 101 and a fourth side edge of a length side of the fourth plate 108. The high-frequency vibrator 103 is arranged along the length direction of the fourth plate 108 and fixed on the fourth plate 108. The middle part of the high-frequency vibrator 103 has a first groove 106. The low-frequency vibrator 104 is arranged along the length direction of the third plate 110 and fixed on the third plate 110. The middle part of the low-frequency vibrator 104 has a second groove 109. The low-frequency vibrator 104 is connected with an output feeder 105 of the satellite mobile terminal.

[0031] In some embodiments, the opening is as shown in the attached Figure 1 After being arranged, the reflection plate is electrically connected with a ground terminal of the satellite mobile terminal and radiates towards a satellite when the satellite mobile terminal is used.

[0032] In the embodiment, the second groove 109 has the function of adjusting the input and output impedance of the antenna 1.

[0033] In the embodiment, the width of the second plate 101, the first plate 102 and the third plate 110 are substantially the same, and the length of the second plate 101, the first plate 102, the fourth plate 108 and the third plate 110 are the same. The width of the fourth plate 108 is smaller than the width of any of the second plate 101, the first plate 102 and the third plate 110. The corresponding length sides of the second plate 101 and the first plate 102 are connected and the second plate 101 and the first plate 102 are arranged vertically, and the corresponding length sides of the third plate 110 and the fourth plate 108 are connected and the third plate 110 and the fourth plate 108 are arranged vertically. Then the reflecting plate is placed vertically and the antenna plate is placed upside down, at this time the second plate 101 and the third plate 110 correspond to each other and are parallel to each other, and the fourth plate 108 and the first plate 102 correspond to each other and are parallel to each other. The corresponding length sides of the third plate 110 and the first plate 102 are connected and the third plate 110 and the first plate 102 are arranged vertically. At this time, the second plate 101 is parallel to the third plate 110, and the distance between the second plate 101 and the third plate 110 is the width of the first plate 102. Since the width of the fourth plate 108 is smaller than the width of the first plate 102, an opening is formed between the fourth plate 108 and the second plate 101.

[0034] In some embodiments, the connection between the first plate 102 and the second plate 101 can be a circular arc surface. Similarly, the connection between the third plate 110 and the fourth plate 108 can be a circular arc surface.

[0035] In the embodiment, the connection between the third plate 110 and the first plate 102 is also vertical and is 90 degrees. It can be understood that the connection between the third plate 110 and the first plate 102 can be an included angle range, as long as the opening is directed towards the satellite when the satellite mobile terminal is used.

[0036] In some embodiments, the width of the second plate 101 and the third plate 110 is the same, and the width of the first plate 102 and the second plate 101 is not the same.

[0037] In this embodiment, the high frequency vibrator 103 is directly formed on the outer side end surface of the fourth plate 108 away from the first plate 102 by a laser process, and the high frequency vibrator 103 extends along the length direction of the fourth plate 108 and has a rectangular shape with a certain width. A first groove 106 with a designed width and length is formed in the middle of the high frequency vibrator 103, and the opening direction of the first groove 106 is towards the second plate 101. The low frequency vibrator 104 extends along the length direction of the third plate 110, and the low frequency vibrator 104 is formed on the outer side end surface of the third plate 110 close to the high frequency vibrator 103, and the low frequency vibrator 104 has a spacing with the high frequency vibrator 103. The low frequency vibrator 104 is also directly formed on the outer side end surface of the third plate 110 away from the second plate 101 by a laser process. The low frequency vibrator 104 is arranged at 90 degrees with the high frequency vibrator 103. The middle of the low frequency vibrator 104 has a second groove 109, and the depth of the second groove 109 is greater than the width of the low frequency vibrator 104, so the second groove 109 extends along the direction perpendicular to the low frequency vibrator 104 for a short distance and is connected with the output feed line 105 through the antenna plate reference ground 107. The opening of the second groove 109 is towards the direction away from the first plate 102. The length of the low frequency vibrator 104 is greater than the length of the high frequency vibrator 103.

[0038] As Figure 2 shown, Figure 2 a structure schematic diagram of an antenna provided by an embodiment of the present application is installed in a satellite mobile terminal. In some embodiments, the antenna 1 is arranged in a first accommodating space corresponding to the top end of the satellite mobile terminal. Specifically, the antenna is arranged in the first accommodating space corresponding to the end of the satellite mobile terminal close to the human ear when in use. In some embodiments, the antenna 1 is arranged symmetrically along the horizontal central axis of the satellite mobile terminal, that is, the antenna can be shorter than the horizontal length of the first accommodating space, or can be the same length, but must satisfy the condition that the antenna is arranged symmetrically on both sides of the horizontal central axis of the satellite mobile terminal.

[0039] In some embodiments, the high frequency vibrator 103 and the low frequency vibrator 104 are arranged symmetrically along the horizontal central axis of the satellite mobile terminal. That is, the first groove 106 and the second groove 109 are respectively divided along the central axis, and the part on the left of the central axis is completely symmetrical with the part on the right of the central axis. And the central axis of the first groove 106 and the second groove 109 coincides with the horizontal central axis of the satellite mobile terminal.

[0040] See Figure 2 and Figure 3 , Figure 3 a structure schematic diagram of an antenna provided by an embodiment of the present application is installed in a satellite mobile terminal A place.

[0041] By Figure 2 and Figure 3As can be seen, the second plate 101 is positioned near the screen 20 of the satellite mobile terminal, while the third plate 110 is positioned near the rear housing 10 of the satellite mobile terminal. In other words, the antenna plate is positioned toward the rear housing 10, while the opening between the fourth plate 108 and the second plate 101 is positioned toward the screen 20. Furthermore, the opening between the fourth plate 108 and the second plate 101 faces away from the top of the satellite mobile terminal. The third plate 110 of the antenna plate is positioned near the back of the satellite mobile terminal.

[0042] Look again Figure 4 , Figure 4 A schematic structural diagram of a reflector for an antenna provided in one embodiment of the present invention.

[0043] A third groove 1101 is defined in the middle of the first side of the first plate 102, away from the second plate 101. The output feeder 105 passes through the third groove 1101, with a predetermined distance between the third groove 1101 and the output feeder 105. The output feeder 105 passes through the third groove 1101 and connects to the mainboard within the satellite mobile terminal.

[0044] Look again Figure 5 , Figure 5 This is a structural diagram of a balun provided by one embodiment of the present invention, with both ends connected to an output feeder of a satellite mobile terminal and a low-frequency oscillator.

[0045] A balun 404 is fixed to the inner end surface of the third plate 110 near the second plate 101 in an area corresponding to the antenna plate reference ground 107. The input end of the balun 404 is connected to the output feeder 105, and the output end of the balun 404 passes through the via 403 and is connected to the low-frequency oscillator 104 in the area corresponding to the second groove 109 via the annular microstrip 807.

[0046] The satellite mobile terminal also provided by the application realizes that the antenna is built-in the satellite mobile terminal and guarantees the communication effect by setting the antenna in the position as described above. Specifically, the high-frequency vibrator 103 and the low-frequency vibrator 104 are respectively in two planes of the third plate 110 and the fourth plate 108 which are perpendicular to each other, unlike the driven vibrator and the radiating vibrator of the Yagi antenna which are in the same plane. The high-frequency vibrator 103 and the low-frequency vibrator 104 are combined to resonate at two center frequencies of high frequency and low frequency, while the Yagi antenna only has the main vibrator resonating and the driven vibrator improving the gain and not resonating at the two center frequencies. The two vibrators are in the two orthogonal planes, which greatly reduces the volume of the antenna and facilitates the built-in of the mobile terminal. Meanwhile, the first groove 106 and the second groove 109 are respectively opened in the middle of the high-frequency vibrator 103 and the low-frequency vibrator 104, and the depth and width of the first groove 106 and the second groove 109 can be adjusted to change the energy distribution of the electromagnetic field at the high-frequency and low-frequency resonance points of the antenna, so as to balance the bandwidths of the high-frequency and low-frequency resonance points and achieve the purpose of expanding the bandwidth. Meanwhile, the reflection plate with the L-shaped cross section is set and connected with the antenna plate with the inverted L-shaped cross section as described above, and when people normally use the satellite mobile terminal, the radiation direction of the antenna is pointed to the obliquely upward direction outside the human body, realizing the directional radiation, which not only reduces the influence of the antenna radiation on the human body, but also effectively improves the antenna gain. Through the above three designs, the built-in of the antenna and the satellite mobile terminal can be realized while the communication effect is guaranteed. In this way, the part of the external antenna with a large length which is exposed outside the satellite mobile terminal body can be removed, the portability of the satellite mobile terminal is greatly improved, the volume of the satellite mobile terminal is small, and the bandwidth and the radiation gain are improved, which guarantees the high sensitivity and the high stability of the satellite mobile terminal. In addition, through the selection of the placement position of the antenna, the antenna vibrator is balanced and symmetrically designed when the antenna is set in the position described above. Meanwhile, the output feed line 105 passes through the third groove 1101 and has a spacing distance between the output feed line 105 and the third groove 1101, and the antenna reference ground is suspended and isolated from the ground of the satellite mobile terminal. Through the selection of the placement position of the high-frequency vibrator 103 and the low-frequency vibrator 104, the above three settings make the satellite mobile terminal be in the 0 potential position of the antenna radiation field, avoiding the influence of the satellite terminal ground on the antenna radiation, and further guaranteeing the communication quality. The function of the balun 404 is to convert the RF single-end 50Ω impedance signal transmitted by the satellite into a differential 100Ω RF signal and feed it into the antenna, and the differential 100Ω RF signal received by the antenna is converted into a single-end 50Ω impedance RF signal, which is not limited to the balun device, but also includes other forms of circuit which can complete this function. The circuit can be set in the mainboard of the satellite mobile terminal, that is, the antenna can have the balun 404 or not.

[0047] AgainFigure 6 , Figure 7 and Figure 8 . Figure 6 A standing wave diagram of an antenna provided by an embodiment of the present application.

[0048] Figure 7 A high-frequency radiation pattern of an antenna provided by an embodiment of the present application. Figure 8 A low-frequency radiation pattern of an antenna provided by an embodiment of the present application.

[0049] Figure 6 A simulated standing wave diagram of an antenna provided by an embodiment of the present application. In the antenna satellite RX frequency band (high frequency band) and TX frequency band, the standing wave is less than 2.0, which meets the requirements of the antenna.

[0050] Figure 7 and Figure 8 are respectively a high-frequency (RX) radiation pattern and a low-frequency (TX) radiation pattern of an antenna provided by an embodiment of the present application. Specifically, in the RX frequency band and the TX frequency band, the antenna radiation suppression in the face direction is-10dBi, which effectively reduces the influence of the human body on the antenna efficiency, thereby improving the antenna efficiency; in the sky direction obliquely above the human body, the antenna gain in the high-frequency (RX) radiation and the low-frequency (TX) band is more than 5dBi. This ensures that the satellite terminal can communicate normally.

[0051] The above describes some embodiments of the present application with reference to the accompanying drawings, but does not limit the scope of the present application. Those skilled in the art can implement the present application in various ways without departing from the scope and essence of the present application, such as using the features of one embodiment in another embodiment to obtain another embodiment. Any modification, equivalent replacement and improvement within the technical concept of the present application shall be within the scope of the present application.

Claims

1. An antenna for a satellite mobile terminal, characterized by The antenna comprises a reflection plate with L-shaped cross section, an antenna plate with inverted L-shaped cross section, a high-frequency vibrator and a low-frequency vibrator, the reflection plate has a first plate and a second plate which are perpendicular to each other or connected by a circular arc, the antenna plate has a third plate and a fourth plate which are perpendicular to each other or connected by a circular arc, a first side edge corresponding to the length side of the first plate and a second side edge corresponding to the length side of the third plate are connected and form an opening between a third side edge corresponding to the length side of the second plate and a fourth side edge corresponding to the length side of the fourth plate, the high-frequency vibrator is arranged along the length direction of the fourth plate and fixed on the fourth plate, the middle part of the high-frequency vibrator has a first groove, the low-frequency vibrator is arranged along the length direction of the third plate and fixed on the third plate, and the middle part of the low-frequency vibrator has a second groove, the low-frequency vibrator is connected with an output feed line of the satellite mobile terminal.

2. The antenna according to claim 1, characterized in that, The antenna is arranged in a first accommodating space corresponding to the top end of the satellite mobile terminal.

3. The antenna according to claim 2, characterized in that, The antenna is symmetrically arranged along the transverse central axis of the satellite mobile terminal.

4. The antenna according to claim 1, wherein, The high-frequency vibrator is arranged on a first end surface of the fourth plate away from the first plate, and the low-frequency vibrator is arranged on a second end surface of the third plate away from the second plate.

5. The antenna according to any one of claims 1 to 3, characterized in that, The high-frequency vibrator and the low-frequency vibrator are arranged transversely along the satellite mobile terminal and symmetrically along the central axis of the satellite mobile terminal.

6. The antenna according to claim 1, wherein, The middle part of the first side edge of the first plate connected with the third plate is provided with a third groove.

7. The antenna according to claim 1, wherein, The second plate of the reflection plate is arranged close to the screen side of the satellite mobile terminal, and the third plate of the antenna plate is arranged away from the screen side of the satellite mobile terminal.

8. The antenna according to claim 1, wherein, The antenna further comprises a balun, an input end of the balun is connected with the output feed line of the satellite mobile terminal, and an output end of the balun is connected with the low-frequency vibrator.

9. The antenna according to claim 6, wherein, The output feed line passes through the third groove and has a spacing distance between the output feed line and the first plate.

10. A satellite mobile terminal, characterized by An antenna as claimed in any one of claims 1 to 9 is provided.

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