CN103247867A - Radio frequency device, wireless communication device and method for improving antenna isolation - Google Patents

Abstract

The invention discloses a radio frequency device, a wireless communication device and a method for improving antenna isolation, wherein the radio frequency device is used for the wireless communication device and comprises an antenna setting area; and a plurality of antennas which have the same form and are formed in the antenna setting area in different setting modes and are used for receiving and transmitting a plurality of wireless signals with the same frequency band.

Description

Radio frequency device, wireless communication device and method for improving antenna isolation

technical field

The present invention relates to a radio frequency device, a wireless communication device and a method, in particular to a radio frequency device, a wireless communication device and a method capable of improving isolation and ensuring good data throughput. the

Background technique

Electronic products with wireless communication functions, such as notebook computers, personal digital assistants (Personal Digital Assistant), etc., transmit or receive radio waves through antennas to transmit or exchange radio signals, and then access wireless networks. Therefore, in order to allow users to access wireless communication networks more conveniently, the bandwidth of an ideal antenna should be increased as much as possible within the allowable range, while the size should be reduced as much as possible to match the trend of shrinking electronic products. In addition, with the continuous evolution of wireless communication technology, the number of antennas configured in electronic products may increase. For example, the Long Term Evolution (LTE) wireless communication system and the wireless local area network standard IEEE 802.11n support the Multi-input Multi-output (MIMO) communication technology, that is, related electronic products can pass multiple (or multiple sets of) antennas synchronously send and receive wireless signals to greatly increase the data throughput (Throughput) and transmission distance of the system without increasing the bandwidth or the total transmission power consumption (Transmit Power Expenditure), thereby effectively improving the wireless The spectral efficiency and transmission rate of the communication system improve the communication quality. the

From the above, it can be known that to realize spatial multiplexing and diverse technologies in the MIMO function, the prerequisite must be to use multiple sets of antennas to divide the space into many channels and provide multiple antenna patterns. Therefore, how to design an antenna that meets the transmission requirements while taking into account the size and function has become one of the goals that the industry is striving for. the

In addition, with the evolution of wireless communication technology, the existing technology has developed different wireless communication systems, such as mobile communication systems (such as GSM, 3G, LTE), wireless area networks (such as Wi-Fi, WiMax) , wireless personal area network (such as Bluetooth, Zigbee), etc. In order to avoid interference between wireless communication systems, different wireless communication systems usually adopt different operating frequency bands and use different communication technologies (including modulation, coding, encryption, etc.). However, under limited wireless resources, some wireless communication systems must adopt the same operating frequency band, which may cause mutual interference problems. the

For example, according to the communication protocols IEEE 802.15.1 and IEEE802.11 of Bluetooth and Wi-Fi, the operating frequency bands of both are around 2.4GHz in the ISM (Industrial Scientific Medical) frequency band (IEEE 802.11a is at 5GHz). The ISM frequency band is the industrial, scientific and medical frequency band, which is a wireless frequency band reserved by countries all over the world, and is used for industrial, scientific research and microwave medical applications. No license is required to use these frequency bands, and only certain regulations need to be followed to avoid interference with other frequency bands. In this case, although the communication protocols of Bluetooth and Wi-Fi are different, the modulation and coding methods used are also different, but because the frequency bands of the two are the same, signal collision (Collision) may occur, that is, (Bluetooth or Wi-Fi The Fi) receiver receives both Bluetooth and Wi-Fi signals at the same time, resulting in errors. the

When there is a signal collision between Bluetooth and Wi-Fi, Wi-Fi can retransmit the data to the receiver through the automatic repeat mechanism (Automatic Repeat reQuest, ARQ), and reduce the transmission rate through the transmission rate adjustment mechanism (Rate Adaptation) to improve Data transmission success rate. However, compared to Wi-Fi, Bluetooth is a low-power wireless connection technology. In other words, Wi-Fi signals can easily cause "saturation" of the Bluetooth receiver. In detail, in the process of receiving wireless signals, the wireless receiver needs to properly adjust the gain of the amplifier (Gain) according to the signal transmission status, so as to effectively down-frequency the RF signal to the base frequency, and then demodulate and decode the correct content. In this case, when the Bluetooth and Wi-Fi signals collide, the Bluetooth receiver will suddenly receive a relatively high-power Wi-Fi signal, which will cause the amplifier to saturate and fail to operate correctly. What's more, when signal collision occurs, the Wi-Fi transmitter (Transmitter) will reduce the transmission rate, which will increase the transmission time of the same packet, which means that the chance of signal collision will increase, which may lead to serious errors. the

For example, if the computer system connects to the Internet wirelessly through Wi-Fi, it also establishes connections with peripheral devices such as earphones, wireless keyboards, and mice through Bluetooth. At this time, if a signal collision occurs, the user can still access the Internet at a lower speed through Wi-Fi, but the peripheral devices of Bluetooth may be interrupted or the connection status is not good, thus reducing the convenience of use. the

The above signal collision situation is an example of Bluetooth and Wi-Fi. These two wireless communication technologies are often used in the same electronic product, such as notebook computers, personal digital assistants, etc., so the problem of signal collision is obvious and serious. Generally speaking, the most effective way to improve signal collision is to increase the antenna isolation. However, in a limited space, it is bound to increase the design difficulty to improve the antenna isolation while maintaining the data throughput of MIMO. the

Therefore, how to increase the isolation between multiple antennas while maintaining good data throughput in a limited space has become one of the goals that the industry is striving for. the

Contents of the invention

Therefore, the main purpose of the present invention is to provide a radio frequency device, a wireless communication device and a method that can improve isolation. the

To achieve the above object, the present invention discloses a radio frequency device for a wireless communication device, the radio frequency device includes an antenna installation area; and a plurality of antennas have the same form and are formed in the antenna installation area in different ways, Used to send and receive multiple wireless signals in the same frequency band. the

The present invention further discloses a wireless communication device, which includes a radio frequency signal processing device for processing a plurality of radio frequency signals of the same frequency band; and a radio frequency device, which includes an antenna setting area; Different configurations are formed in the antenna configuration area and coupled to the radio frequency signal processing device for sending and receiving the plurality of wireless signals. the

The present invention also discloses a method for improving antenna isolation, which includes designing multiple antennas of the same type according to an operating frequency band of a wireless communication device; and forming the multiple antennas on the wireless communication device in different arrangements. An antenna setting area is used for transmitting and receiving multiple wireless signals of the operating frequency band. the

Description of drawings

Fig. 1 is a schematic diagram of a radio frequency device according to an embodiment of the present invention;

Fig. 2 is the schematic diagram of a radio frequency device;

Figure 3A is a schematic diagram of the isolation between two antennas in the radio frequency device of Figure 2;

Fig. 3B is a schematic diagram of the isolation between two antennas in the radio frequency device of Fig. 1;

Fig. 4 is a comparative schematic diagram of the data throughput of the radio frequency device of Fig. 2 and the radio frequency device of Fig. 1;

5 is a schematic diagram of a radio frequency device according to an embodiment of the present invention;

6 is a schematic diagram of a radio frequency device according to an embodiment of the present invention;

7A to 7E are schematic diagrams of antennas with different architectures;

Figure 8A is a schematic diagram of an embodiment of a notebook computer configuration of the radio frequency device of Figure 1;

Figure 8B is a schematic diagram of another embodiment of a notebook computer configuration of the radio frequency device of Figure 1;

FIG. 9 is a flow chart for improving antenna isolation according to an embodiment of the present invention. the

10A to 10D are respectively an isometric view, a side view, a front view and a back view of a tubular mechanism according to an embodiment of the present invention. the

Description of main component symbols

10, 20, 50, 60 RF Devices

100, 200, 500, 600 Antenna setting area

102, 202, 502, 602, 112 The first antenna

104, 204, 504, 604, 114 Second Antenna

1020, 1040 Radiator

1022, 1042 Feed-in terminal

1024, 1044 Grounding part

D1, D2 Direction

80 Notebook Computer

800 Base

802 Screen

90 Process

900, 902, 904, 906 Steps

11 Tubular mechanism

Detailed ways

Please refer to FIG. 1 , which is a schematic diagram of a radio frequency device 10 according to an embodiment of the present invention. The radio frequency device 10 is used as a wireless communication device with a wireless communication function. More precisely, the wireless communication device can support simultaneous transmission and reception of multiple wireless signals of the same frequency band, and the radio frequency device 10 can ensure the isolation under this operation. The so-called "simultaneous transmission and reception of multiple wireless signals of the same frequency band" can be a wireless communication system (such as LTE, IEEE 802.11n, etc.) (such as Bluetooth and Wi-Fi) to send and receive wireless signals at the same time. As shown in FIG. 1 , the radio frequency device 10 includes a first antenna 102 and a second antenna 104 disposed in an antenna installation area 100 . The first antenna 102 and the second antenna 104 have the same form and can transmit and receive wireless signals of the same frequency band, but are formed in the antenna installation area 100 in different ways. the

Specifically, the first antenna 102 includes a radiator 1020, a feed-in terminal 1022, and a ground portion 1024. Similarly, the second antenna 104 includes a radiator 1040, a feed-in port 1042, and a ground portion 1044. Comparing the first antenna 102 and the second antenna 104, it can be seen that the components of the two are exactly the same, so the operating principle is also the same. The difference is that, taking FIG. to the bottom (that is, the direction D1 ), and the direction from the radiator 1040 of the second antenna 104 to the ground terminal 1044 is from bottom to top (that is, the direction D2 ). Through different configurations (or placements), the first antenna 102 and the second antenna 104 can have good isolation, so as to meet the requirement of transmitting and receiving wireless signals of the same frequency band at the same time. As is well known to those skilled in the art, good antenna isolation can avoid collisions when wireless signals are sent and received at the same time, thereby increasing antenna efficiency and ensuring good data throughput. the

For example, please refer to FIG. 2 , which is a schematic diagram of a radio frequency device 20 . The structure of the radio frequency device 20 is similar to that of the radio frequency device 10, and also includes a first antenna 202 and a second antenna 204. The difference is that the first antenna 202 and the second antenna 204 have the same form (with the first antenna shown in FIG. 102 and the second antenna 104 are the same), and are formed in an antenna installation area 200 in the same arrangement manner at the same time, that is, the radiator to the ground end are arranged from top to bottom. Please continue to refer to FIG. 3A and FIG. 3B . FIG. 3A and FIG. 3B are schematic diagrams of isolation between two antennas in the radio frequency device 20 and the radio frequency device 10 respectively. It can be seen from FIG. 3A and FIG. 3B that although the composition of the radio frequency device 20 is the same as that of the radio frequency device 10 , the radio frequency device 10 can effectively improve the isolation through the differentiated arrangement of the two antennas. Further, please refer to FIG. 4 . FIG. 4 is a schematic diagram of comparing the data throughput of the radio frequency device 20 and the radio frequency device 10 , and are represented by dashed lines and solid lines respectively. It can be seen from FIG. 4 that the radio frequency device 10 can effectively improve the isolation and correspondingly improve the data throughput, so it is suitable for the application of simultaneously transmitting and receiving two wireless signals of the same frequency band. the

From the above, it can be known that the radio frequency device 10 can have a good isolation through the first antenna 102 and the second antenna 104 arranged in different ways, so that the requirement of simultaneously transmitting and receiving wireless signals of the same frequency band can be met. It should be noted that the aforementioned antenna setting method is based on the direction from the radiator to the ground terminal, but it is not limited to this, any method that can be used to define the antenna setting method can be used as a basis for judgment, for example, the radiator is relative to the ground terminal or the feeder The position of the input end, the position of the ground end relative to the radiator or the feed end, the relative position of the high frequency part and the low frequency part of the radiator...etc. the

In addition, in FIG. 1 , the first antenna 102 and the second antenna 104 are arranged upside down, but it is not limited thereto, and other forms of different arrangements are also possible. For example, FIG. 5 is a schematic diagram of a radio frequency device 50 according to an embodiment of the present invention. The structure of the radio frequency device 50 is similar to that of the radio frequency device 10 , and also includes a first antenna 502 and a second antenna 504 of the same form disposed in an antenna setting area 500 . Wherein, the radiator of the first antenna 502 is arranged from top to bottom to the ground end, while the radiator of the second antenna 504 is arranged from right to left to the ground end, which can also improve the isolation. In addition, FIG. 6 is a schematic diagram of a radio frequency device 60 according to an embodiment of the present invention. The structure of the radio frequency device 60 is similar to that of the radio frequency device 10 , and also includes a first antenna 602 and a second antenna 604 of the same form disposed in an antenna setting area 600 . Wherein, the radiator of the first antenna 602 is arranged from left to right to the ground end, and the radiator of the second antenna 604 is arranged from right to left to the ground end, which can also improve the isolation. the

FIG. 5 and FIG. 6 illustrate that the different arrangements that can improve the isolation in the present invention are not limited to the upside-down arrangement, and can be appropriately adjusted according to system or design requirements. In addition, in FIG. 1 , the first antenna 102 and the second antenna 104 are planar antennas with a lightning structure but different arrangements. However, it is not limited to this architecture, and those skilled in the art can design appropriate antenna architectures according to requirements, such as planar inverted-F antennas, dipole antennas, folded dipole antennas, slot antennas, and the like. the

For example, FIG. 7A to FIG. 7E are schematic diagrams of antennas with different architectures, all of which can realize the first antenna 102 and the second antenna 104, and the designer can select a suitable antenna among them according to the needs of the system, or make appropriate changes, or Redesign etc. are not limited to this. the

On the other hand, in FIG. 1 , the antenna installation area 100 may be an area for installing an antenna in a wireless communication device. For example, please refer to FIG. 8A , which is a schematic diagram of a notebook computer 80 according to an embodiment of the present invention. The notebook computer 80 includes a base 800 and a screen 802, which are connected by a rotating shaft (and a flexible circuit board). In this case, as shown in FIG. 8A , the antenna installation area 100 may be a hinge area in the base 800 of the notebook computer 80 for connecting the hinge, that is, the radio frequency device 10 is disposed in the base 800 . In this way, when the screen 802 of the notebook computer 80 is turned over, the radio frequency device 10 disposed in the base 800 will not be turned over with the screen 802 , which can ensure the consistency of the antenna characteristics and maintain the antenna efficiency. the

FIG. 8A illustrates the area where the radio frequency device 10 can be installed in the notebook computer 80. However, it is not limited thereto. The radio frequency device 10 can also be installed in other areas of the notebook computer 80. For example, in FIG. 8B, the radio frequency device 10 is set Under the screen 802 of the notebook computer 80 , this arrangement can also achieve good isolation and avoid collisions when wireless signals are sent and received at the same time. The antenna setting area 100 may be a rotating shaft area below the screen 802 . On the other hand, the radio frequency device 10 can be installed in a wireless communication device with a wireless communication function such as a mobile phone, a tablet computer, a wireless access point device, and the like. Applying the radio frequency device 10 (or other embodiments) to a wireless communication device with a wireless communication function should be a technology familiar in the art, for example, the first antenna 102 and the second antenna 104 in the radio frequency device 10 should be the same The radio frequency signal processing device is coupled, so that the radio frequency signal processing device can use the good isolation characteristics of the first antenna 102 and the second antenna 104 to process multiple radio frequency signals of the same frequency band, so as to support multiple wireless signals of the same frequency band at the same time send and receive. the

In the foregoing embodiments, the antenna installation area is mainly in the plane direction for the convenience of description. However, it should be noted that in the present invention, the antenna installation area refers to the area used to install the antenna in the wireless communication device. In other words, it is not limited to two-dimensional directions, but can also be three-dimensional or composed of multiple fragment areas. For example, please refer to FIG. 10A to FIG. 10D . FIG. 10A to FIG. 10D are isometric views, side views, front views and back views of a tubular mechanism 11 according to an embodiment of the present invention. The tubular mechanism 11 can be a part of the hinge structure of a notebook computer. According to the present invention, a first antenna 112 and a second antenna 114 are provided, and the first antenna 112 and the second antenna 114 are of the same type, and have different The arrangement is formed on the front and back of the tubular mechanism 11, so that the isolation of the antenna can be improved, avoiding collisions when sending and receiving wireless signals at the same time, so as to ensure good data throughput. the

In addition, in the above-mentioned embodiments, two antennas are mainly used, which shows that the isolation can be improved through different arrangements. In fact, the applicable scope of the present invention is not limited to two antennas, and the same concept can also be applied to more than two antennas with the same form. Related operation methods can be summarized into a process 90, as shown in FIG. 9 . Process 90 is used to improve antenna isolation, which includes the following steps:

Step 900: start. the

Step 902: Design multiple antennas of the same type according to an operating frequency band of a wireless communication device. the

Step 904: Form the plurality of antennas in different configurations in an antenna configuration area of the wireless communication device for transmitting and receiving a plurality of wireless signals in the operating frequency band. the

Step 906: end. the

According to the process 90, when the wireless communication device can simultaneously send and receive multiple wireless signals of the same frequency band, such as supporting multiple-input multiple-output communication technology or supporting different wireless communication systems (such as Bluetooth and Wi-Fi) using the same frequency band, the present invention Corresponding multiple antennas can be formed in the antenna setting area of the wireless communication device in different ways, and the isolation can be improved through different ways to avoid collisions when sending and receiving wireless signals at the same time, thereby increasing antenna efficiency and ensuring good data throughput. the

To sum up, the present invention improves the isolation between antennas in a limited space by setting different antennas, thereby increasing antenna efficiency and ensuring good data throughput. the

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the claims of the present invention shall fall within the scope of the present invention. the

Claims (18)

1. a radio-frequency unit is used for a wireless communication apparatus, and this radio-frequency unit includes:

The antenna setting area; And

A plurality of antennas have same form, and are formed at this antenna setting area with different set-up modes, are used for receiving and dispatching a plurality of wireless signals of same frequency band.

2. radio-frequency unit as claimed in claim 1, wherein these a plurality of antennas are supported a multiple-input and multiple-output communication system.

3. radio-frequency unit as claimed in claim 1, wherein this wireless communication apparatus is a notebook computer, this antenna setting area is a rotating shaft zone in this notebook computer.

4. radio-frequency unit as claimed in claim 1, wherein a plurality of set-up modes of these a plurality of antennas are that a direction according to radiant body to an earth terminal of each antenna defines.

5. radio-frequency unit as claimed in claim 1, wherein these a plurality of antennas are planar inverted-F antenna, dipole antenna, collapsible dipole antenna or slot antenna.

6. radio-frequency unit as claimed in claim 1, wherein this antenna setting area is positioned at front and the back side of a tubulose mechanism of this wireless communication apparatus.

7. wireless communication apparatus includes:

Radio frequency signal processing equipment is used for handling the radiofrequency signal of a plurality of same frequency bands; And

Radio-frequency unit includes:

The antenna setting area; And

A plurality of antennas have same form, and are formed at this antenna setting area and are coupled to this radio frequency signal processing equipment with different set-up modes, are used for receiving and dispatching these a plurality of wireless signals.

8. wireless communication apparatus as claimed in claim 7, wherein these a plurality of antennas are supported a multiple-input and multiple-output communication system.

9. wireless communication apparatus as claimed in claim 7, wherein this wireless communication apparatus is a notebook computer, this antenna setting area is a rotating shaft zone in this notebook computer.

10. wireless communication apparatus as claimed in claim 7, wherein a plurality of set-up modes of these a plurality of antennas are that a direction according to radiant body to an earth terminal of each antenna defines.

11. wireless communication apparatus as claimed in claim 7, wherein these a plurality of antennas are planar inverted-F antenna, dipole antenna, collapsible dipole antenna or slot antenna.

12. wireless communication apparatus as claimed in claim 7, wherein this antenna setting area is positioned at front and the back side of a tubulose mechanism of this wireless communication apparatus.

13. a method that promotes isolation between antennas includes:

According to an operational frequency bands of a wireless communication apparatus, a plurality of antennas of design same form; And

These a plurality of antennas are formed at an antenna setting area of this wireless communication apparatus with different set-up modes, in order to receive and dispatch a plurality of wireless signals of this operational frequency bands.

14. method as claimed in claim 13, wherein these a plurality of antennas are supported a multiple-input and multiple-output communication system.

15. method as claimed in claim 13, wherein this wireless communication apparatus is a notebook computer, and this antenna setting area is a rotating shaft zone in this notebook computer.

16. method as claimed in claim 13, wherein a plurality of set-up modes of these a plurality of antennas are that a direction according to radiant body to an earth terminal of each antenna defines.

17. method as claimed in claim 13, wherein these a plurality of antennas are planar inverted-F antenna, dipole antenna, collapsible dipole antenna or slot antenna.

18. method as claimed in claim 13, wherein this antenna setting area is positioned at front and the back side of a tubulose mechanism of this wireless communication apparatus.

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