TWI543440B - Antenna device and antenna apparatus for mobile communication - Google Patents

Description

Antenna device and mobile communication antenna device

The present invention relates to an antenna device, and more particularly to an antenna device and a mobile communication antenna device suitable for a multiple input multiple output system.

The provision of network communication services for high-speed rail trains is a trend in the future, and the means for providing network communication services during high-speed movement is currently achieved by antenna architecture design, but the antenna architecture on the market is only applicable to data. Single-Input Single-Output (SISO) system with poor transmission rate. Therefore, the present inventors have felt that the above-mentioned deficiencies can be improved, and they have devoted themselves to research and cooperated with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

An object of the embodiments of the present invention is to provide an antenna device and a mobile communication antenna device, which are suitable for a Multi-Input Multi-Output (MIMO) system.

An embodiment of the present invention provides a mobile communication antenna device, including: a transport device having a substantially elongated shape defining a length direction; and an antenna device including: a fixed seat mounted on the transport device; a polarized antenna module disposed on the fixed base, the first polarized antenna module having a dual-frequency monopole antenna disposed in a coplanar manner, and the plane of the dual-frequency monopole antenna is substantially perpendicular to the length square And a second polarized antenna module having: a carrier mounted on the fixed base; two dual-frequency dipole antennas disposed in a coplanar manner and formed on the carrier, each The dual-frequency dipole antenna defines a long-axis direction and has a feeding section and a grounding section spaced along the long-axis direction; wherein the long-axis directions of the two dual-frequency dipole antennas are substantially perpendicular to each other, the two The plane of the dual-frequency dipole antenna is substantially perpendicular to the plane of the dual-frequency monopole antenna, and the polarization directions of the two dual-frequency dipole antennas are substantially perpendicular to the polarization direction of the dual-frequency monopole antenna; A splitter is disposed on the carrier and electrically connected to the two feed segments, and the splitter is configured to flow a current received by the splitter to the two feed segments at a phase difference of 90 degrees.

The embodiment of the present invention further provides an antenna device, including: a fixed base; a first polarized antenna module disposed on the fixed base, the first polarized antenna module having a dual frequency in a coplanar setting a monopole antenna; and a second polarized antenna module, comprising: a carrier mounted on the fixing base; and two dual-frequency dipole antennas disposed in a coplanar manner and formed on the carrier Each of the dual-frequency dipole antennas defines a long-axis direction and has a feeding section and a grounding section spaced along the long-axis direction; wherein the long-axis directions of the two dual-frequency dipole antennas are substantially perpendicular to each other, The planes of the two dual-frequency dipole antennas are substantially perpendicular to the plane of the dual-frequency monopole antenna, and the polarization directions of the two dual-frequency dipole antennas are substantially perpendicular to the polarization direction of the dual-frequency monopole antenna. And a splitter mounted on the carrier and electrically connected to the two feed segments, the splitter is configured to flow a current received by the splitter to the two feed segments at a phase difference of 90 degrees .

In summary, the antenna device and the mobile communication antenna device provided by the embodiments of the present invention can be applied to a multiple input multiple output system, and the first polarized antenna module and the second polarized antenna module of the antenna device are both It can provide an omnidirectional radiation field and can achieve polarization orthogonality.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

100‧‧‧Transportation device

101‧‧‧ compartment

200‧‧‧Antenna device

1‧‧‧ fixed seat

11‧‧‧Metal floor

12‧‧‧Connecting board

121‧‧‧ socket

13‧‧‧Perforation

2‧‧‧First Polarized Antenna Module

21‧‧‧ first carrier

22‧‧‧Double-frequency monopole antenna

221‧‧‧High frequency band

222‧‧‧low frequency band

223‧‧‧impedance matching section

3‧‧‧Second-polarized antenna module

31‧‧‧ Carrier

311‧‧‧Second carrier

312‧‧‧Support board

32‧‧‧Double-frequency dipole antenna

321‧‧‧Feeding section

322‧‧‧ Grounding section

323‧‧‧Extension

324‧‧‧High frequency section

325‧‧‧Low frequency section

33‧‧‧Demultiplexer

4‧‧‧ radome

5‧‧‧First cable

6‧‧‧Second cable

L‧‧‧ Length direction (speed direction of the carriage)

D‧‧‧Long-axis direction

θ‧‧‧Minimum angle

1 is a perspective view of a mobile communication antenna device of the present invention.

2 is a perspective view of the antenna device of FIG. 1.

3 is a perspective view of the antenna device of FIG. 2 with the radome omitted.

4 is a perspective view of another perspective of FIG. 3.

5 is a top plan view of a second polarized antenna module of the mobile communication antenna device of the present invention.

6 is a horizontal vertical polarization radiation pattern diagram of a dual-frequency monopole antenna of the mobile communication antenna device of the present invention at a low frequency (1800 MHz).

7 is a horizontal vertical polarization radiation pattern diagram of a dual-frequency monopole antenna of the mobile communication antenna device of the present invention at a high frequency (2600 MHz).

FIG. 8 is a horizontal horizontal polarization radiation pattern diagram of a dual-frequency dipole antenna of the mobile communication antenna device of the present invention at a low frequency (1800 MHz).

FIG. 9 is a horizontal horizontal polarization radiation pattern diagram of a dual-frequency dipole antenna of the mobile communication antenna device of the present invention at a high frequency (2600 MHz).

FIG. 10 is a perspective view of an antenna device (not shown) of a mobile communication antenna device according to another embodiment of the present invention.

Please refer to FIG. 1 to FIG. 9 , which are the first embodiment of the present invention. It should be noted that the related quantities and appearances mentioned in the embodiment are only used to specifically describe the implementation of the present invention. The manner in which the content is understood is not to be construed as limiting the scope of the invention.

As shown in FIG. 1 , the present embodiment is a mobile communication antenna device including a transport device 100 and an antenna device 200 mounted on the transport device 100. The transport device 100 is exemplified by a car 101 in the present embodiment, such as a high-speed rail car, a trolley car, a MRT car, or other car with a transport function, and the transport device 100 (eg: The compartment 101) is substantially elongated and defines a longitudinal direction L, and the speed direction of the compartment 101 of the transport device 100 is substantially parallel to the longitudinal direction L, However, in actual use, the speed direction of the transport device 100 can vary with the terrain or the driving route.

Furthermore, the antenna device 200 is applied to the Long Term Evolution (LTE) of the fourth generation of mobile phone mobile communications standards (4G) in the present embodiment, and the operating frequency thereof. The range is approximately the dual band range of 1700 MHz to 1900 MHz and 2500 MHz to 2700 MHz. And the antenna device 200 provided in this embodiment can be applied to a multiple input multiple output (MIMO) system. However, when the antenna device 200 is used in practical applications, its application range is not limited to Long Term Evolution (LTE) technology, that is, the antenna device 200 can also be applied to other fourth generation mobile communication technologies, for example, global interworking microwave. Worldwide Interoperability for Microwave Access (WiMax); or second-generation mobile communication technology (2G) or third-generation mobile communication technology (3G), which is not limited herein.

As shown in FIG. 2, the antenna device 200 includes a fixed base 1, a first polarized antenna module 2, a second polarized antenna module 3, a radome 4, a first cable 5, and A second cable 6. The first polarized antenna module 2 and the second polarized antenna module 3 are mounted on the fixed base 1 , and the radome 4 is mounted on the fixed base 1 and the first polarized antenna module 2 and the second The first antenna 5 is electrically connected to the first polarized antenna module 2, and the second cable 6 is electrically connected to the second polarized antenna module 3.

Referring to FIG. 3 to FIG. 5 , the fixing base 1 has a metal base plate 11 mounted on the transport device 100 and a connecting plate 12 disposed on the metal base plate 11 , and the fixing base 1 is formed with a through metal base plate 11 . A perforation 13 is formed with the connecting plate 12. Wherein, the contour of the perforated 13 position on the metal base plate 11 is larger than the contour of the perforated 13 position on the connecting plate 12.

In more detail, the metal base plate 11 has a substantially rectangular plate body and is fixedly fixed (eg, locked) to the top surface of the transport device 100, and the longitudinal direction of the metal base plate 11 is substantially parallel to the transport device 100. The length direction L. The connecting plate 12 is elliptical And flattened (eg, locked) on the metal base plate 11, and the contour of the connecting plate 12 is located within the outline of the metal base plate 11, and the long axis of the ellipse of the connecting plate 12 is substantially parallel to the length of the metal base plate 11. Axis direction. In the embodiment, the connecting plate 12 is provided with a socket 121 having a conductive function and corresponding to the through hole 13 , but is not limited thereto.

The first polarized antenna module 2 has a first carrier 21 and a dual-frequency monopole antenna 22 disposed in a coplanar manner. The first carrier 21 is vertically disposed on the connecting plate 12 of the fixed base 1, and the first carrier 21 is perpendicular to the longitudinal direction L of the compartment 101, and the dual-frequency monopole antenna 22 is formed on the first carrier 21. The socket 121 is electrically connected to the socket 121, that is, the plane of the dual-frequency monopole antenna 22 is substantially perpendicular to the longitudinal direction L of the compartment 101.

In more detail, the dual-frequency monopole antenna 22 has a high frequency band 221, a low frequency band 222, and an impedance matching segment 223. The low frequency band 222 is substantially linear and perpendicular to the connecting plate 12, and the high frequency band 221 is substantially L-shaped and has one end connected to the low frequency band 222. The impedance matching portion 223 is substantially linear and parallel to the connecting plate 12, and the impedance matching portion is One end of the 223 is connected to the low frequency band 222, and the high frequency band 221 and the impedance matching segment 223 are respectively located on opposite sides of the low frequency band 222 (such as the left side and the right side of the low frequency band 222 in FIG. 3). Furthermore, the feeding point and the grounding point (not shown) of the dual-frequency monopole antenna 22 are also connected to the socket 121 of the connecting plate 12.

Thereby, the dual-frequency monopole antenna 22 is constructed in such a way as to exhibit an omni-directional radiation pattern on the plane in which it is located (eg, the plate surface of the first carrier 21). Further, in the process of moving the transport device 100, the antenna device 200 shown in FIG. 1 has a horizontally polarized radiation pattern of the dual-frequency monopole antenna 22 at a low frequency (1800 MHz) as shown in FIG. 6 (equivalent The horizontally polarized radiation pattern of the dual-frequency monopole antenna 22 at a high frequency (2600 MHz) is shown in FIG.

The second polarized antenna module 3 has a carrier 31, two dual-frequency dipole antennas 32, and a demultiplexer 33. The carrier 31 has a substantially elliptical shape The two supporting plates 311 and the two supporting plates 312 are located on opposite sides of the first carrier plate 21, and the bottom ends of the two supporting plates 312 are respectively fixed on opposite sides of the elliptical long axis of the connecting plate 12. The two ends of the two supporting plates 312 are respectively fixed on opposite ends of the elliptical long axis of the second carrier 311, so that the first carrier 21 is located on the second carrier 311 and the connecting board 12 Between and the second carrier 311 is parallel to the connecting plate 12.

In more detail, the second carrier 311 and the first carrier 21 are separated by a distance, thereby improving the isolation between the two. Furthermore, the second carrier 311 and the first carrier 21 are substantially perpendicular to each other, and the through holes 13 of the fixing base 1 are substantially located on the first carrier 21 and the support plate 312 away from the first carrier 21 (as shown in the figure). 3 is located between the support plates 312) on the left side. In addition, although the two support plates 312 are taken as an example in this embodiment, the carrier 31 may use only one support plate 312 on the premise that the second carrier 311 can be stably supported.

The two dual-frequency dipole antennas 32 are disposed in a coplanar manner and are formed on the top surface of the second carrier 311 of the carrier 31. That is, the planes of the two dual-frequency dipole antennas 32 are substantially perpendicular to the dual-band. The plane in which the monopole antenna 22 is located, and the polarization directions of the two dual-frequency dipole antennas 32 (eg, the horizontal polarization direction) are substantially perpendicular to the polarization direction of the dual-frequency monopole antenna 22 (eg, the vertical polarization direction) ).

The dual-frequency dipole antenna 32 has a feed section 321, a ground section 322, and two extension sections 323 as described below with respect to the configuration of the single dual-frequency dipole antenna 32. The dual-frequency dipole antenna 32 defines a long-axis direction D, and the feeding section 321 and the grounding section 322 are arranged along the long-axis direction D. That is, the feeding section 321 and the grounding section 322 are arranged in a long strip shape. Moreover, in each of the dual-frequency dipole antennas 32, the two extensions 323 are formed by bending and extending from the end of the feeding section 321 and the grounding section 322, respectively, and each extension section 323 is connected thereto. The angle between the feed section 321 or the ground section 322 is no more than 60 degrees.

Further, the feeding section 321 and the grounding section 322 each have an adjacent and parallel high frequency section 324 and a low frequency section 325, and the width of the high frequency section 324. The low frequency section 325 corresponding to the length is smaller than the length. The extension 323 is formed by the extension of both adjacent and parallel high frequency sections 324 and low frequency sections 325.

Then, with respect to the configuration of the two dual-frequency dipole antennas 32, the long-axis directions D of the two dual-frequency dipole antennas 32 are substantially perpendicular to each other, and the ends of the two feeding-in sections 321 adjacent to each other are respectively disposed. There is a feed point (not shown), and one end of each of the two ground segments 322 adjacent to each other is provided with a grounding point (not shown). Further, the two dual-frequency dipole antennas 32 are substantially quad-rotational symmetry patterns, that is, the two dual-frequency dipole antennas 32 are 360 degrees at their center points. When rotating, the pattern of the two dual-frequency dipole antennas 32 overlaps four times, so it is called quadruple rotational symmetry.

Furthermore, on the plane in which the two dual-frequency dipole antennas 32 are located (eg, the top surface of the second carrier 311), the length direction L of the transport device 100 (eg, the compartment 101) and the above two dual frequencies The minimum angle θ formed by one of the major axis directions D of the dipole antenna 32 is preferably approximately 0 to 10 degrees. At this time, the two dual-frequency dipole antennas 32 correspond to the length direction L of the transport device 100. The opposite sides (corresponding to the front and rear of the transport device 100 when moving) will result in better radiation intensity.

The definition of the minimum angle θ can also be said to be an axis parallel to the longitudinal direction L of the transport device 100 on the plane of the two dual-frequency dipole antennas 32 (eg, the ellipse length of the second carrier 311) The angle formed by the long axis direction D of one of the two dual-frequency dipole antennas 32 described above. Moreover, the minimum angle θ is exemplified by 5 degrees in the embodiment, but in practical applications, the minimum angle θ is not limited thereto. In other words, the minimum angle θ may also be greater than 10 degrees, while allowing partial characteristics to be sacrificed.

The demultiplexer 33 is mounted on the top surface of the second carrier 311 of the carrier 31, and the branching device 33 is connected to the feeding points of the two feeding sections 321 and is electrically connected. Under the above architecture (such as the antenna device 200 shown in FIG. 2), the demultiplexer 33 can be used to shunt a current it receives to the two feed segments 321 with a phase difference of 90 degrees. Thus, the two dual-frequency dipole antennas 32 are in the plane in which they are located (eg, second The radiation field patterns on the top surface of the carrier 311 can be superimposed on each other to achieve a circular polarization radiation field, and thus exhibit an omnidirectional radiation pattern (see Figures 8 and 9). Show). Further, in the process of moving the transport device 100, the antenna device 200 shown in FIG. 1 has a horizontally polarized radiation pattern of the dual-frequency dipole antenna 32 at a low frequency (1800 MHz) as shown in FIG. The radiation pattern of the top surface of the parallel second carrier 311 is parallel to the horizontally polarized radiation pattern of the dual-frequency dipole antenna 32 at a high frequency (2600 MHz).

The first cable 5 includes a signal line (not labeled) and a ground line (not labeled), and the first cable 5 is inserted from the metal base 11 of the fixed base 1 through the metal base 11 to be inserted into the The socket 121 of the connecting board 12 is electrically connected to the feeding point and the grounding point of the dual-frequency monopole antenna 22 via the socket 121 of the connecting board 12, respectively.

The second cable 6 includes a signal line (not labeled) and a ground line (not labeled), and the second cable 6 passes through the through hole 13 of the fixed seat 1 and makes the signal line of the second cable 6 The grounding wires are electrically connected to the decoupling 33 and the grounding point of the grounding section 322 of the two dual-frequency dipole antennas 32, respectively. The second cable 6 is located at a portion between the second carrier 311 and the connecting board 12, and is at least partially fixed to the connecting board 12 and the supporting board 312 away from the first carrier 21 (as shown in FIG. 3). The support plate 312) on the left side, so that the second cable 6 is away from the dual-frequency monopole antenna 22, so that the isolation between the dual-frequency monopole antenna 22 and the dual-frequency dipole antenna 32 can be effectively maintained at less than - 30dB.

Referring to FIG. 10, which is a second embodiment of the present invention, the present embodiment is similar to the first embodiment described above, and the same portions are not described again, and the differences between the two are mainly as follows: The polarized antenna module 2 does not have the first carrier 21 described in the first embodiment. That is, the dual-frequency monopole antenna 22 of the present embodiment does not need to be formed on the first carrier 21, but is a metal piece. It is formed and vertically disposed on the socket 121 of the connecting plate 12 of the fixing base 1.

In summary, the mobile communication antenna device provided by the embodiment of the present invention can be applied to a multiple input multiple output system, and the first polarized antenna module of the antenna device and the second polarized antenna module have good isolation. Under the premise of the degree, it can provide the omnidirectional radiation field type and can achieve polarization orthogonality. That is to say, the antenna device not only meets the requirements of the multi-input and multi-output system, but also has a radiation field type of polarization orthogonal and omnidirectional.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent variations and modifications of the scope of the invention are intended to be within the scope of the invention.

1‧‧‧ fixed seat

11‧‧‧Metal floor

12‧‧‧Connecting board

121‧‧‧ socket

13‧‧‧Perforation

2‧‧‧First Polarized Antenna Module

21‧‧‧ first carrier

22‧‧‧Double-frequency monopole antenna

221‧‧‧High frequency band

222‧‧‧low frequency band

223‧‧‧impedance matching section

3‧‧‧Second-polarized antenna module

31‧‧‧ Carrier

311‧‧‧Second carrier

312‧‧‧Support board

32‧‧‧Double-frequency dipole antenna

33‧‧‧Demultiplexer

5‧‧‧First cable

6‧‧‧Second cable

L‧‧‧ Length direction (speed direction of the carriage)

Claims (9)

A mobile communication antenna device includes: a transport device having a substantially elongated shape defining a length direction; and an antenna device comprising: a fixed seat mounted on the transport device; and a first polarized antenna module The first polarized antenna module has a dual-frequency monopole antenna disposed in a coplanar manner, and the plane of the dual-frequency monopole antenna is substantially perpendicular to the length direction; The dual-polarized antenna module has: a carrier mounted on the fixed seat; two dual-frequency dipole antennas disposed in a coplanar manner and formed on the carrier, each dual-frequency dipole antenna Defining a long axis direction and having a feed section spaced along the long axis direction and a ground segment; wherein the long axis directions of the two dual frequency dipole antennas are substantially perpendicular to each other, the two dual frequency dipoles The plane in which the antenna is located is substantially perpendicular to the plane in which the dual-frequency monopole antenna is located, and the polarization directions of the two dual-frequency dipole antennas are substantially perpendicular to the polarization direction of the dual-frequency monopole antenna; and a demultiplexer, Mounted on the carrier Electrically connected to the two feeding segments, the splitter is configured to flow a current received by the phase difference to the two feeding segments by a phase difference of 90 degrees; wherein, the plane where the two dual-frequency dipole antennas are located The minimum angle formed by the longitudinal direction of the transport device and the longitudinal direction of one of the two dual-frequency dipole antennas is approximately 0 to 10 degrees. The mobile communication antenna device of claim 1, wherein one end of the two feeding sections adjacent to each other is provided with a feeding point, and one end of each of the two grounding sections adjacent to each other is provided with a grounding point, and the demultiplexer is provided. Connected to the feed point of the two feed segments. The mobile communication antenna device of claim 1, wherein each dual-frequency dipole antenna has two extensions, and among each of the dual-frequency dipole antennas, the two extensions It is formed by bending and extending from one end of the feeding section and the grounding section away from each other. The mobile communication antenna device of claim 3, wherein an angle between each of the extension segments and the connected feed segment or the ground segment is no more than 60 degrees. The mobile communication antenna device of claim 1, wherein the two dual-frequency dipole antennas are substantially quad-rotational symmetry graphics. The mobile communication antenna device of claim 1, wherein the fixed base has a metal base plate mounted on the transport device and a connecting plate disposed on the metal base plate, the first polarized antenna module having a The first carrier board is formed on the first carrier board, and the first carrier board is vertically disposed on the connection board, and the dual-frequency monopole antenna is electrically connected to the connection board. The mobile communication antenna device of claim 6, wherein the carrier has a second carrier and at least one support board, the two dual-frequency dipole antennas are formed on the second carrier, and the support board Connecting the connecting plate and the second carrier such that the first carrier is located between the second carrier and the connecting plate, and the second carrier is parallel to the connecting plate. The mobile communication antenna device of claim 7, wherein the fixing base is formed with a through hole penetrating the metal base plate and the connecting plate, and the through hole is substantially located between the first carrier plate and the supporting plate; The antenna device further includes a first cable and a second cable, the first cable is connected to the connecting board, and is electrically connected to the dual-frequency monopole antenna via the connecting board, the second cable Passing through the through hole and electrically connecting to the branching device and the grounding portion of the two dual-frequency dipole antennas, and the portion of the second cable between the second carrier and the connecting plate is at least partially fixed to The support plate and the connecting plate are away from the dual-frequency monopole antenna. An antenna device includes: a fixed base; a first polarized antenna module disposed on the fixed base, the first polarized antenna module having a dual-frequency monopole antenna disposed in a coplanar manner; A second polarized antenna module has: a carrier mounted on the fixed base; two dual-frequency dipole antennas disposed in a coplanar manner and formed on the carrier, each dual-frequency couple The pole antenna defines a long axis direction and has a feeding section and a grounding section spaced along the long axis direction; wherein the long axis directions of the two dual frequency dipole antennas are substantially perpendicular to each other, the two dual frequencies The plane of the dipole antenna is substantially perpendicular to the plane of the dual-frequency monopole antenna, and the polarization directions of the two dual-frequency dipole antennas are substantially perpendicular to the polarization direction of the dual-frequency monopole antenna; The dual-frequency dipole antenna has two extension segments, and in each of the dual-frequency dipole antennas, the two extension segments are formed by bending and extending from one end of the feeding segment and the grounding segment away from each other, and each An angle between the extension section and the connected feed section or the ground section is not more than 60 degrees; and a splitter mounted on the carrier and electrically connected to the two feed sections, the splitter is used to a current received by the current is transmitted to the two feeds with a phase difference of 90 degrees Into the paragraph.