CN111009739A

CN111009739A - MIMO antenna device and mobile terminal

Info

Publication number: CN111009739A
Application number: CN201911378916.XA
Authority: CN
Inventors: 陈卫; 陈志伟; 白松
Original assignee: Huizhou TCL Mobile Communication Co Ltd
Current assignee: Huizhou TCL Mobile Communication Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-14
Also published as: WO2021128552A1

Abstract

The embodiment of the invention discloses an MIMO antenna device and a mobile terminal; the MIMO antenna apparatus includes: the MIMO antenna at least comprises a main set antenna and a diversity antenna, wherein the main set antenna is arranged on a small main set antenna plate, the small main set antenna plate is horizontally arranged on a grounding plate, the diversity antenna is arranged on the small diversity antenna plate, the small diversity antenna plate is vertically arranged on a main plate, and the main plate is horizontally arranged on the grounding plate. According to the scheme, the main set antenna and the diversity antenna are arranged, so that the radiation directions of the main set antenna and the diversity antenna are obviously different, the two antennas are different from the coupling of the space incoming wave signal, the signals received by the two antennas can be obviously distinguished, and the MIMO performance is improved.

Description

MIMO antenna device and mobile terminal

Technical Field

The invention relates to the technical field of communication transmission, in particular to an MIMO antenna device and a mobile terminal.

Background

MIMO (multiple Input multiple Output) technology is an important technical means for 5G communication, and is increasingly considered as an important index in design. MIMO technology is intended to improve the capacity and spectrum utilization of a communication system by a multiple without increasing the bandwidth. In the MIMO technology, a receiver and a transmitter are simultaneously configured with multiple antennas for communication, as shown in fig. 1, a transmitting end and 2 antennas simultaneously transmit two signals, X1 and X2, and the throughput is doubled; the performance of the MIMO greatly depends on the quality of an MIMO channel model, namely, after two paths of signals are transmitted through space and received by 2 antennas of a terminal, a mobile phone chip can obviously distinguish the two paths of signals; the MIMO channel model is formed by a directional diagram of a base station antenna, a space transmission environment and a directional diagram of a terminal antenna; the MIMO theory uses the changes in amplitude, phase and time delay caused by these signals in space transmission to achieve the purpose of multi-antenna transmission of multi-channel signals. For a terminal, optimizing MIMO performance can be achieved by optimizing the terminal antenna pattern.

Taking a mobile phone as an example, an antenna radiation pattern is mainly determined by a relative relation between an electric wire ground end (GND) of a main board and an antenna, the antenna radiation pattern is a pattern in which the relative field intensity (normalized module value) of a radiation field changes along with the direction at a certain distance from the antenna, and the antenna radiation pattern is a pattern description method for the antenna radiation characteristics, and various parameters of the antenna can be observed from the antenna pattern. The conventionally designed mobile phone antenna radiation pattern is in an apple pattern shape with the longitudinal axis of the mobile phone as the center, and the main set antenna (MIMO antenna 1) and the diversity antenna (MIMO antenna 2) radiation patterns are similar, so that the formed MIMO channel model is not good, and the MIMO performance is poor. Therefore, how to optimize the MIMO performance by optimizing the terminal antenna pattern is a design challenge.

Disclosure of Invention

The embodiment of the invention provides an MIMO antenna device and a mobile terminal, which optimize the MIMO performance by optimizing a directional diagram of an antenna of the mobile terminal.

An MIMO antenna apparatus provided in an embodiment of the present invention includes:

the MIMO antenna at least comprises a main set antenna and a diversity antenna;

the main set antenna is arranged on a small main set antenna plate, and the small main set antenna plate is horizontally placed on the grounding plate;

the diversity antenna is arranged on a diversity antenna small plate, the diversity antenna small plate is vertically arranged on a main board, and the main board is horizontally arranged on the grounding plate.

Optionally, in some embodiments of the present invention, the diversity antenna is disposed on a diversity antenna platelet, including:

the diversity antenna is arranged on one side of the diversity antenna platelet, which faces the bottom of the mobile terminal.

Optionally, in some embodiments of the present invention, the main set antenna platelet is horizontally placed on the ground plane, and includes:

and the electric wire grounding end of the small main collector antenna plate is connected with the grounding plate.

Optionally, in some embodiments of the present invention, the diversity antenna platelet is vertically placed on the main board, and includes:

the diversity antenna platelet is provided with a preset angle between one surface of the diversity antenna and the surface of the mainboard;

the preset angle ranges from 90 to 120 degrees.

Optionally, in some embodiments of the present invention, the main set antenna is connected to the main set antenna platelet through an antenna dome, and the diversity antenna is connected to the diversity antenna platelet through the antenna dome.

Optionally, in some embodiments of the present invention, the diversity antenna platelet is connected to the main board through a flexible cable, and the antenna tuner is located on the diversity antenna platelet and connected to the main board through a flexible circuit board.

Optionally, in some embodiments of the present invention, the diversity antenna platelet is connected to the main board through a flexible cable, and includes:

and the radio-frequency signal on the diversity antenna platelet is connected with the radio-frequency signal on the mainboard through the flexible cable.

Optionally, in some embodiments of the present invention, the radiation of the diversity antenna is towards the top of the mobile terminal, and the radiation of the main set antenna is towards the back of the mobile terminal.

Correspondingly, the embodiment of the invention also provides the mobile terminal, wherein the main set antenna is arranged at the bottom of the mobile terminal, and the diversity antenna is arranged at the top of the mobile terminal.

Optionally, in some embodiments of the present invention, the mobile terminal includes the MIMO antenna apparatus described above.

An embodiment of the present invention provides an MIMO antenna apparatus and a mobile terminal, where the MIMO antenna apparatus includes: the MIMO antenna at least comprises a main set antenna and a diversity antenna, wherein the main set antenna is arranged on a small main set antenna plate, the small main set antenna plate is horizontally arranged on a grounding plate, the diversity antenna is arranged on the small diversity antenna plate, the small diversity antenna plate is vertically arranged on a main plate, and the main plate is horizontally arranged on the grounding plate. According to the scheme, the main set antenna and the diversity antenna are arranged, so that the radiation directions of the main set antenna and the diversity antenna are obviously different, the two antennas are different from the coupling of the space incoming wave signal, the signals received by the two antennas can be obviously distinguished, and the MIMO performance is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic diagram of a MIMO antenna technology provided in the background of the invention;

fig. 2 is a schematic diagram of a MIMO antenna apparatus according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a mobile terminal according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one". In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the invention provides a MIMO antenna device and a mobile terminal. The antenna structure provided by the embodiment of the invention is integrated in the mobile terminal, and the mobile terminal can be a mobile phone, a tablet computer, a notebook computer and other equipment. The mobile terminal provided with the MIMO antenna device can communicate with a network device (such as a server) or other mobile terminals (such as a smart phone) through a wireless network, and complete information transceiving with the network device or other mobile terminals.

As shown in fig. 2, a MIMO antenna apparatus according to an embodiment of the present invention includes: the MIMO antenna arranged in the mobile terminal at least comprises a main set antenna 105 and a diversity antenna 106, wherein the main set antenna 105 is arranged at the bottom of the mobile terminal, and the diversity antenna 106 is arranged at the top of the mobile terminal; the mobile terminal further comprises a main board 101 and a ground board 102, wherein a main set antenna 105 is arranged on a main set antenna platelet 104, the main set antenna platelet 104 is horizontally arranged on the ground board 102, a diversity antenna 106 is arranged on a diversity antenna platelet 103, the diversity antenna platelet 103 is vertically arranged on the main board 101, and the main board 101 is horizontally arranged on the ground board 102.

There is no strict requirement on the arrangement of the main set antenna 105 and the diversity antenna 106, and one antenna that simultaneously performs transmission and reception is usually called a main set antenna, and the other antenna that performs reception only is called a diversity antenna. The types of MIMO antennas in the mobile terminal include: PIFA (Planar Inverted F-shaped Antenna), IFA (Inverted F-shaped Antenna), Monopole (Monopole Antenna), Loop (Loop Antenna).

Optionally, in the embodiment of the present invention, the ground plate 102 of the mobile terminal may be a front shell reinforced steel plate, or may be other materials used for grounding the whole machine.

The diversity antenna 106 is disposed on a side of the diversity antenna platelet 103 facing the bottom of the mobile terminal, a preset angle is formed between a surface of the diversity antenna platelet 103 on which the diversity antenna 106 is disposed and a surface of the mobile terminal main board 101, and the preset angle ranges from 90 degrees to 120 degrees and may include two end values.

Optionally, the shapes of the main set antenna platelet 104 and the diversity antenna platelet 103 are not particularly required, and may be rectangular flat plates or irregularly shaped flat plates. The small master antenna assembly 104 is generally disposed at the bottom of the mobile terminal such that the small master antenna assembly 104 does not interfere with the internal structure of the mobile terminal. The layout of the main set antenna 105 and the diversity antenna 106 on the respective antenna small plates is not particularly required, and the main set antenna 105 and the diversity antenna 106 may be formed in any shape and disposed on the respective small plates, and the shapes of the main set antenna 105 and the diversity antenna 106 are not specified.

Optionally, in the embodiment of the present invention, the main board 101 and the ground board 102 are rectangular, the main board 101 is horizontally placed on the ground board 102, and an edge of the main board 101 coincides with an edge of the ground board 102. The main board 101 and the ground plane 102 may not be exactly rectangular, the edge of the main board 101 may not coincide with the edge of the ground plane 102, and the main board 101 may be smaller than the ground plane 102.

The electric wire grounding end of the small main antenna collector 104 is connected with the grounding plate 102 of the mobile terminal, the electric wire grounding end of the main board 101 of the mobile terminal is also connected with the grounding plate 102, the electric wire grounding end of the small diversity antenna plate 103 is separately arranged and is not connected with the grounding plate 102, the electric wire grounding end of the diversity antenna 106 is in a vertical state, the direction difference between the diversity antenna 106 and the main antenna collector 105 is large, received signals of the two antennas are distinguished, and further the MIMO performance is improved.

The main antenna 105 and the small main antenna 104 are connected through an antenna spring, and the diversity antenna 106 and the small diversity antenna 103 are connected through an antenna spring. The diversity antenna platelet 103 is connected with the main board 101 through a flexible cable which can be bent, the antenna tuner is arranged on the diversity antenna platelet 103, and the antenna tuner is connected with the main board 101 through a flexible circuit board.

The Flexible cable (Flexible cable) connects a Radio Frequency signal on the diversity antenna platelet 103 and a Radio Frequency signal on the motherboard 101, and the Radio Frequency (RF-Radio Frequency) signal is modulated and has a Radio wave with a certain transmission Frequency. The flexible cable connecting the diversity antenna platelet 103 and the main board 101 is a preferred cable for power transmission materials and signal transmission carriers in a drag chain motion system, and is also known as: tow chain cables, tow cables, travelling cables, robot cables, etc. The conductor structure of the flexible cable is mainly based on the twisted copper conductor structure of DIN VDE0295 and IEC 228 standards, and the sheath is made of low-viscosity flexible wear-resistant materials so as to reduce the wear rate of the cable in continuous reciprocating movement.

An antenna tuner (tuner) to be controlled by the diversity antenna platelet 103 is called antenna tuning for short, and is used between a transmitter and an antenna, and when tuning, the microprocessor controls the analog-to-digital converter to quantize sampling parameters provided by the detection circuit into digital signals, and then the digital signals are read into the memory, and after processing, the state change of the matching network is controlled, so that impedance matching is realized. An antenna tuner is an impedance matching network that connects a transmitter to an antenna and enables impedance matching between the transmitter and the antenna, thereby maximizing the radiated power of the antenna at any frequency. The radio station is widely applied to ground, vehicle-mounted, ship-based and aviation short-wave radio stations. The antenna tuner is composed of a matching network, a detection circuit and a control circuit.

The flexible printed Circuit board (FPC) connecting the antenna tuner on the diversity antenna platelet 103 and the main board 101 is a highly reliable and excellent flexible printed Circuit board made of polyimide or polyester film as a base material, and has the characteristics of high wiring density, light weight, small thickness, and good bending property. The FPC is not only a flexible circuit Board, but also an important design way of connecting the flexible circuit Board and the three-dimensional circuit structure, and the structure can be combined with other electronic product designs to construct various different applications, and from this point of view, the FPC is different from a printed circuit Board (PCB for short). The PCB is generally planar, and the FPC can fully utilize the space. For PCB, the common space extension scheme is to add interface card to the slot, but the FPC can be made into similar structure by using the switch design, and the directional design is flexible.

The diversity antenna platelet 103 and the diversity antenna 106 are vertically arranged on the main board 101 of the mobile terminal, so that the main radiation of the diversity antenna 106 faces the top direction of the mobile terminal, and the design of the main set antenna platelet 104 and the main set antenna 105 is horizontally arranged on the ground plate 102 of the mobile terminal, so that the main radiation of the main set antenna 105 faces the back direction of the mobile phone, so that the radiation directivities of the two antennas of the main set antenna 105 and the diversity antenna 106 are obviously different, the two antennas are coupled with the incoming space wave signals differently, the received signals of the two antennas can be obviously distinguished, and further the performance of the MIMO is improved.

Optionally, the antenna provided in the embodiment of the present invention is mainly applicable to a 2 x 2MIMO system, and the two antennas may be in a form of a primary set and a diversity set for each other.

In the embodiment of the invention, taking a mobile phone as an example, an antenna radiation pattern of the mobile phone is in an apple pattern shape taking a longitudinal axis of the mobile phone as a center, that is, the maximum radiation direction when the mobile phone is vertically placed is a direction surrounding the mobile phone and perpendicular to the longitudinal axis of the mobile phone, the scheme sets different placing directions of a main set antenna 105 and a diversity antenna 106 through the design of an integral antenna in a mobile terminal, so that the radiation direction of the antennas is changed, the radiation of the diversity antenna 106 mainly faces the top of the mobile phone, the radiation of the main set antenna 105 mainly faces the back of the mobile phone, and the two antennas are coupled with different space incoming wave signals, so that signals received by the two antennas can be obviously distinguished, and the performance of MIMO is improved.

Accordingly, as shown in fig. 3, the mobile terminal may include Radio Frequency (RF) circuit 301, a memory 302 including one or more computer-readable storage media, an input unit 303, a display unit 304, a sensor 305, an audio circuit 306, a wireless fidelity (WiFi) module 307, a processor 308 including one or more processing cores, and a power supply 309. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 3 is not intended to be limiting of mobile terminals and may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components. Wherein:

the RF circuit 301 may be used for receiving and transmitting signals during information transmission and reception or during a call, and in particular, for receiving downlink information from a base station and then processing the received downlink information by one or more processors 308; in addition, data relating to uplink is transmitted to the base station. In general, the RF circuit 301 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the RF circuitry 301 may also communicate with networks and other devices via wireless communications. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

In an embodiment of the present invention, the RF circuit 301 includes the MIMO antenna apparatus described in any of the above embodiments.

The memory 302 may be used to store software programs and modules, and the processor 308 executes various functional applications and data processing by operating the software programs and modules stored in the memory 302. The memory 302 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the mobile terminal, and the like. Further, the memory 302 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 302 may also include a memory controller to provide the processor 308 and the input unit 303 access to the memory 302.

The input unit 303 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, in one particular embodiment, the input unit 303 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 308, and can receive and execute commands sent by the processor 308. In addition, touch sensitive surfaces may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 303 may include other input devices in addition to the touch-sensitive surface. In particular, other input devices may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.

The display unit 304 may be used to display information input by or provided to the user and various graphical user interfaces of the mobile terminal, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 304 may include a display panel, and optionally, the display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 308 to determine the type of touch event, and the processor 308 then provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 3 the touch-sensitive surface and the display panel are shown as two separate components to implement input and output functions, in some embodiments the touch-sensitive surface may be integrated with the display panel to implement input and output functions.

The mobile terminal may also include at least one sensor 305, such as a light sensor, motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel according to the brightness of ambient light, and a proximity sensor that may turn off the display panel and/or the backlight when the mobile terminal is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile terminal, further description is omitted here.

Audio circuitry 306, a speaker, and a microphone may provide an audio interface between the user and the mobile terminal. The audio circuit 306 may transmit the electrical signal converted from the received audio data to a speaker, and convert the electrical signal into a sound signal for output; on the other hand, the microphone converts the collected sound signal into an electric signal, which is received by the audio circuit 306 and converted into audio data, which is then processed by the audio data output processor 308, and then transmitted to, for example, another mobile terminal via the RF circuit 301, or the audio data is output to the memory 302 for further processing. The audio circuitry 306 may also include an earbud jack to provide communication of a peripheral headset with the mobile terminal.

WiFi belongs to a short-distance wireless transmission technology, and the mobile terminal can help a user to send and receive e-mails, browse webpages, access streaming media and the like through the WiFi module 307, and provides wireless broadband internet access for the user. Although fig. 3 shows the WiFi module 307, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 308 is a control center of the mobile terminal, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 302 and calling data stored in the memory 302, thereby performing overall monitoring of the mobile phone. Optionally, processor 308 may include one or more processing cores; preferably, the processor 308 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 308.

The mobile terminal also includes a power supply 309 (e.g., a battery) for powering the various components, which may preferably be logically coupled to the processor 308 via a power management system that may be configured to manage charging, discharging, and power consumption. The power supply 309 may also include one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and any like components.

Although not shown, the mobile terminal may further include a camera, a bluetooth module, and the like, which will not be described herein. Specifically, in this embodiment, the processor 308 in the mobile terminal loads the executable file corresponding to the process of one or more application programs into the memory 302 according to the following instructions, and the processor 308 runs the application programs stored in the memory 302, thereby implementing various functions.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The MIMO antenna and the mobile terminal provided by the embodiments of the present invention are described in detail above, and the principles and embodiments of the present invention are explained herein by applying specific embodiments, and the description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. A MIMO antenna apparatus, comprising:

the MIMO antenna at least comprises a main set antenna and a diversity antenna;

2. The MIMO antenna apparatus of claim 1, wherein the diversity antenna is disposed on a diversity antenna platelet, comprising:

3. The MIMO antenna apparatus of claim 1, wherein the diversity antenna platelet is vertically placed on the main board, comprising:

the preset angle ranges from 90 to 120 degrees.

4. The MIMO antenna apparatus of claim 1, wherein the primary set antenna platelet is horizontally disposed on a ground plane, comprising:

5. The MIMO antenna apparatus of claim 1, wherein the main set antenna is connected to the main set antenna platelet through an antenna clip, and the diversity antenna is connected to the diversity antenna platelet through the antenna clip.

6. The MIMO antenna apparatus of claim 1, wherein the diversity antenna platelet is connected to the main board by a flexible cable, and an antenna tuner is located on the diversity antenna platelet, the antenna tuner being connected to the main board by a flexible circuit board.

7. The MIMO antenna apparatus of claim 6, wherein the diversity antenna platelet is connected to the main board by a flexible cable, comprising:

8. The MIMO antenna apparatus of claim 1, wherein the diversity antennas radiate toward a top of the mobile terminal and the main set antennas radiate toward a back of the mobile terminal.

9. A mobile terminal, comprising: the main set antenna is arranged at the bottom of the mobile terminal, and the diversity antenna is arranged at the top of the mobile terminal.

10. A mobile terminal according to claim 9, characterized in that it comprises a MIMO antenna arrangement according to any of claims 1-8.