TWI523325B - Antenna system with high isolation - Google Patents

Description

High isolation antenna system

In response to the demand for high-speed and large-scale data transmission, in today's notebook computers or handheld devices, antenna systems using wireless communication usually use a multi-input multi-output (MIMO) antenna system. It has become the mainstream technology for the development of wireless network communication, for example, two transmitting ends to three receiving ends (2 × 3) or three transmitting ends to three receiving ends (3 × 3) antenna system, and applied to short distance An antenna system for Wireless Local Area Network (WLAN) or Worldwide Interoperability for Mircowave Access (WiMAX) communication, usually using Single-Input Multi-Output (SIMO) or An antenna system that receives multiple outputs multiple times, for example, one transmitting end to two receiving ends (1×2) or two transmitting ends to two receiving ends (2×2).

However, for wireless communication products (such as notebook computers or handheld devices), it is usually limited by the size and can only provide a small space to accommodate the MIMO multi-antenna system, so when more antenna system devices are applied This will cause the distance between the antenna system devices to become closer and closer, and it is easy to cause electromagnetic near-field coupling interference between the antenna system devices and the conduction current of the system ground plane, causing mutual interference between the signals.

The above mutual interference problem can improve the isolation between the antennas. (isolation) to solve. There are two main methods for improving the isolation of the antenna. The first is to form an isolation trench between the two antennas on the ground plane, and the second is to protrude between the two sides of the ground plane and the two antennas. There are extensions and the antenna isolation is improved by means of jammers. However, the provision of the trench will destroy the original ground plane structure, and the provision of the extension will increase the installation and structure of the component, and will also adversely affect the transmission of the module signal, resulting in important parameters such as the operating frequency and radiation pattern of the antenna. And increased the design difficulty of the antenna system.

The object of the present invention is to provide an antenna isolation solution with a complete ground plane, which can effectively reduce mutual interference between antennas, thereby improving antenna isolation.

In accordance with the above objects, the present invention provides an antenna system with high isolation. The antenna system includes a dielectric substrate, a ground plane, an antenna system device, and a metallic conductive cover. The ground plane is disposed on the dielectric substrate, and the first space and the second space opposite to the first space are defined on the dielectric substrate. The antenna system device includes a first antenna radiator and a second antenna radiator. The first antenna radiator is disposed in the first space. The first antenna radiator includes a first radiating portion and a first signal feeding assembly. The first radiating portion is disposed on the first side of the dielectric substrate, and includes a first planar radiating portion and a first extended radiating portion, wherein the first planar radiating portion is electrically connected to the ground plane, and the first extended radiating portion is vertically Set on the first side. The positive end of the first signal feeding component is electrically connected to the first radiating portion, and the negative end thereof is electrically connected to the grounding surface. The first signal feeding component is configured to feed the first electrical signal to the first radiating portion. Second antenna radiation The body is disposed in the second space. The second antenna radiator includes a second radiating portion and a second signal feeding assembly. The second radiating portion is disposed on the second side of the dielectric substrate, and includes a second planar radiating portion and a second extended radiating portion, wherein the second planar radiating portion is electrically connected to the ground plane, and the second extended radiating portion is perpendicular Standing on the second side. The positive end of the second signal feeding component is electrically connected to the second radiating part, and the negative end thereof is electrically connected to the grounding surface. The second signal feeding component is configured to feed the second electrical signal to the second radiating portion. The metal conductive cover is disposed above the dielectric substrate and includes a first isolation device, a second isolation device, and an extension conductor. The first isolation device includes a first planar coupling portion, a first extended coupling portion, and a first extended resonant portion. The first planar coupling portion is disposed in the first space and on the first side. The first extension coupling portion is electrically connected to the first plane coupling portion and vertically erected on the first side. The first extension resonating portion is electrically connected to the first extension coupling portion, and a plane direction thereof is perpendicular to a plane direction of the first extension coupling portion and parallel to a plane direction of the ground plane. The second isolation device includes a second planar coupling portion, a second extended coupling portion, and a second extended resonant portion. The second planar coupling portion is disposed in the second space and on the second side. The second extension coupling portion is electrically connected to the second planar coupling portion and vertically erected on the second side. The second extension resonating portion is electrically connected to the second extension coupling portion and the first extension resonance portion, and a plane direction thereof is perpendicular to a plane direction of the second extension coupling portion and parallel to a plane direction of the ground plane. The planar direction of the extended conductor is substantially parallel to the planar direction of the ground plane. The extension conductor includes a front end extension portion and a rear end conductor portion, wherein the front end extension portion is electrically connected to the first extension resonance portion and the second extension resonance portion, and the rear end conductor portion is electrically connected to the front end extension portion.

In accordance with the above objects, the present invention further provides an antenna system having high isolation. The antenna system includes a dielectric substrate, a ground plane, a multi-antenna system device, and a metallic conductive cover. The ground plane is disposed on the dielectric substrate, and the first space, the second space, the third space, and the fourth space are defined on the dielectric substrate. Wherein, the first space, the second space, the third space and the fourth space are opposite to each other on four sides of the medium substrate. The antenna system device includes at least a first antenna radiator, a second antenna radiator, a third antenna radiator, and a fourth antenna radiator. The first antenna radiator is disposed in the first space. The first antenna radiator includes a first radiating portion and a first signal feeding assembly. The first radiating portion is disposed on the first side of the dielectric substrate, and includes a first planar radiating portion and a first extended radiating portion, wherein the first planar radiating portion is electrically connected to the ground plane, and the first extended radiating portion is vertically Set on the first side. The positive end of the first signal feeding component is electrically connected to the first radiating portion, and the negative end thereof is electrically connected to the grounding surface. The first signal feeding component is configured to feed the first electrical signal to the first radiating portion. The second antenna radiator is disposed in the second space. The second antenna radiator includes a second radiating portion and a second signal feeding assembly. The second radiating portion is disposed on the second side of the dielectric substrate, and includes a second planar radiating portion and a second extended radiating portion, wherein the second planar radiating portion is electrically connected to the ground plane, and the second extended radiating portion is perpendicular Standing on the second side. The positive end of the second signal feeding component is electrically connected to the second radiating part, and the negative end thereof is electrically connected to the grounding surface. The second signal feeding component is configured to feed the second electrical signal to the second radiating portion. The third antenna radiator includes a third radiating portion and a third signal feeding assembly. The third radiating portion is disposed on the first side, and includes a third planar radiating portion and a third extended radiating portion, wherein the third planar radiating portion is electrically connected to the ground And a third extended radiating portion is vertically erected on the first side. The positive terminal of the third signal feeding component is electrically connected to the third radiating portion, and the negative terminal thereof is electrically connected to the grounding surface. The third signal feeding component is configured to feed the third electrical signal to the third radiating portion. The fourth antenna radiator includes a fourth radiating portion and a fourth signal feeding assembly. The fourth radiating portion is disposed on the second side, and includes a fourth planar radiating portion and a fourth extending radiating portion, wherein the fourth planar radiating portion is electrically connected to the ground plane, and the fourth extended radiating portion is vertically disposed at the second side On the side. The positive terminal of the fourth signal feeding component is electrically connected to the fourth radiating portion, and the negative terminal thereof is electrically connected to the grounding surface. The fourth signal feeding component is configured to feed the fourth electrical signal to the fourth radiating portion. The metal conductive cover is disposed above the dielectric substrate and includes a first isolation device, a second isolation device, a third isolation device, a fourth isolation device, and an extension conductor. The first isolation device includes a first planar coupling portion, a first extended coupling portion, and a first extended resonant portion. The first planar coupling portion is disposed in the first space and on the first side. The first extension coupling portion is electrically connected to the first plane coupling portion and vertically erected on the first side. The first extension resonating portion is electrically connected to the first extension coupling portion, and a plane direction thereof is perpendicular to a plane direction of the first extension coupling portion and parallel to a plane direction of the ground plane. The second isolation device includes a second planar coupling portion, a second extended coupling portion, and a second extended resonant portion. The second planar coupling portion is disposed in the second space and on the second side. The second extension coupling portion is electrically connected to the second planar coupling portion and vertically erected on the second side. The second extension resonating portion is electrically connected to the second extension coupling portion and the first extension resonance portion, and a plane direction thereof is perpendicular to a plane direction of the second extension coupling portion and parallel to a plane direction of the ground plane. The third isolation device includes a third planar coupling portion, a third extended coupling portion, and a third Extend the resonance. The third planar coupling portion is disposed in the third space and on the first side. The third extension coupling portion is electrically connected to the third planar coupling portion and vertically erected on the first side. The third extension resonating portion is electrically connected to the third extension coupling portion, and the plane direction thereof is perpendicular to the plane direction of the third extension coupling portion and parallel to the plane direction of the ground plane. The fourth isolation device includes a fourth planar coupling portion, a fourth extended coupling portion, and a fourth extended resonant portion. The fourth planar coupling portion is disposed on the fourth space and on the second side. The fourth extension coupling portion is electrically connected to the fourth plane coupling portion and vertically erected on the second side. The fourth extension resonator is electrically connected to the fourth extension coupling portion and the third extension resonance portion, and the plane direction thereof is perpendicular to the plane direction of the fourth extension coupling portion and parallel to the plane direction of the ground plane. The planar direction of the extended conductor is substantially parallel to the planar direction of the ground plane. The extension conductor includes a first front end extension, a second front end extension, and a rear end conductor portion. The first front end extension is electrically connected to the first extension resonance portion and the second extension resonance portion. The second front end extension is electrically connected to the third extension resonance portion and the fourth extension resonance portion. The rear end conductor portion is electrically connected to the first front end extension portion and the second front end extension portion, and is located between the first front end extension portion and the second front end extension portion.

1000‧‧‧Antenna system

1100‧‧‧Media substrate

1110, 1120‧‧‧ Area

1110a, 1110b, 1120a, 1120b‧‧‧ subregion

1200‧‧‧ ground plane

1210, 1220‧‧‧ Grounding Department

1300‧‧‧Antenna system installation

1310, 1320‧‧‧Antenna radiator

1312, 1322‧‧‧ Radiation Department

1312a, 1322a‧‧‧ Planar Radiation Department

1312b, 1322b‧‧‧Extension Radiation Department

1314, 1324‧‧‧ signal feed components

1400‧‧‧Metal conductive cover

1410, 1420‧‧‧Isolation device

1411, 1421‧‧‧ Planar Coupling Department

1412, 1422‧‧‧Extension coupling

1413, 1423‧‧‧ Extended Resonance

1430‧‧‧Extended conductor

1431‧‧‧ Front end extension

1432‧‧‧ Rear end conductor

D1, D2, DL1, DL2‧‧‧ spacing

E1, E2, E3, E4‧‧‧ side

F1, F2‧‧‧ folding line

L1, L2, L3‧‧‧ length

LD‧‧‧ length direction

The above and other objects, features, advantages and embodiments of the present invention will become more <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; A schematic top view of a ground plane disposed on a dielectric substrate in accordance with an embodiment of the present invention; 3 is a schematic structural view of an antenna system device according to an embodiment of the present invention; FIG. 4 is a schematic structural view of a metal conductive cover according to an embodiment of the present invention; FIG. 5A is a view showing an antenna according to an embodiment of the present invention; A coupled current profile of the system device; and FIG. 5B is a coupled current profile of the metal conductive cover in accordance with an embodiment of the present invention.

Embodiments of the invention are discussed in detail below. However, it will be appreciated that the embodiments provide many applicable inventive concepts that can be implemented in a wide variety of specific content. The specific embodiments discussed are illustrative only and are not intended to limit the scope of the invention.

Please refer to FIG. 1 , which is a schematic structural diagram of an antenna system 1000 according to an embodiment of the present invention. The antenna system 1000 includes a dielectric substrate 1100, a ground plane 1200, an antenna system device 1300, and a metallic conductive cover 1400. The antenna system device 1300 includes two antennas, such as a planar inverted-F antenna (PIFA), and the metal conductive cover 1400 is used to provide an inductor-capacitance resonant mode to isolate the two antennas to avoid this. The two antennas interfere with each other. In order to facilitate the description of the isolation mechanism of the metal conductive cover 1400, the following is a description of the structure of the antenna system device 1300 and the metal conductive cover 1400, respectively.

Please refer to FIG. 2 and FIG. 3 simultaneously. FIG. 2 is a plan view showing the ground plane 1200 disposed on the dielectric substrate 1100 according to an embodiment of the present invention. FIG. 3 is a schematic top plan view of an antenna system device 1300 according to an embodiment of the present invention. In the embodiment of the present invention, the material selected for the dielectric substrate 1100 is glass fiber, but the invention is not limited thereto. As shown in FIG. 2, the ground plane 1200 is disposed on the dielectric substrate 1100, and opposing two regions 1110 and 1120 are defined on the dielectric substrate 1100. In the embodiment of the present invention, the dielectric substrate 1100 is rectangular, and the ground plane 1200 is composed of two ground portions 1210 and 1220, wherein the ground plane 1200 has a length direction LD. The ground portion 1210 is provided on the side E1 of the dielectric substrate 1100, and the ground portion 1220 is disposed between the ground portion 1210 and the side E2 of the dielectric substrate 1100. In the embodiment of the present invention, the ground portions 1210 and 1220 are rectangular, and the planar area of the ground portion 1220 is larger than the planar area of the ground portion 1210. It should be noted that the shape of the dielectric substrate 1100, the ground portions 1210 and 1220 of the present invention is not limited to the above.

Antenna system arrangement 1300 includes antenna radiators 1310 and 1320. Antenna radiators 1310 and 1320 are disposed in regions 1110 and 1120, respectively, which expose portions of sub-regions 1110a, 1110b, 1120a, and 1120b in regions 1110 and 1120 on dielectric substrate 1100, respectively. In the embodiment of the present invention, the material of the antenna radiators 1310 and 1320 is a conductive metal, but the embodiment of the present invention is not limited thereto.

The radiating portion 1312 of the antenna radiator 1310 has a plane radiating portion 1312a and an extending radiating portion 1312b which are perpendicular to each other. In this embodiment, the planar radiating portion 1312a is disposed in the region 1110 and electrically connected to the ground plane 1200, and the extended radiating portion 1312b is vertically erected on the side of the planar radiating portion 1312a along the folding line F1 (or On the side E3 of the dielectric substrate 1100). Similarly, the radiating portion 1322 of the antenna radiator 1320 has a plane radiating portion 1322a and an extending radiating portion 1322b which are perpendicular to each other. The planar radiating portion 1322a is disposed in the region 1120 and electrically connected to the ground plane 1200, and the extended radiating portion 1322b is vertically erected on the side of the planar radiating portion 1322a along the folding line F2 (or the side of the dielectric substrate 1100). On the side E4).

In some embodiments, the antenna radiators 1310 and 1320 are mirror-symmetrically aligned centering on the ground plane 1200. In this case, the length L1 of the extended radiation portion 1312b and the length L2 of the extended radiation portion 1322b are equal. In other embodiments, the length L1 of the extended radiating portion 1312b and the length L2 of the extended radiating portion 1322b may not be equal. Further, in the embodiment of the present invention, the length L1 of the extended radiation portion 1312b and the length L2 of the extended radiation portion 1322b are both smaller than the length L3 of the ground portion 1200.

In the antenna system arrangement 1300, the antenna radiators 1310 and 1320 further include signal feed components 1314 and 1324, respectively, to feed electrical signals to the planar radiating portions 1312a and 1322a. Signal feed components 1314 and 1324 are disposed in sub-regions 1110a and 1120a, respectively. The positive end of the signal feeding component 1314 is electrically connected to the radiating portion 1312, and the negative end is electrically connected to the grounding surface 1200 for feeding the electrical signal to the radiating portion 1312. Similarly, the positive terminal of the signal feeding component 1324 is electrically connected to the radiating portion 1322, and the negative terminal is electrically connected to the grounding surface 1200 for feeding the electrical signal to the radiating portion 1322.

Please refer to FIG. 4 , which is a schematic structural view of a metal conductive cover 1400 according to an embodiment of the invention. In Figure 4, a metallic conductive cover 1400 is included. In this embodiment, the materials of the isolating devices 1410, 1420 and the extended conductors 1430 are all conductive metals, but embodiments of the present invention are not limited. this.

The isolation device 1410 includes a planar coupling portion 1411, an extension coupling portion 1412, and an extension resonance portion 1413, and the isolation device 1420 includes a planar coupling portion 1421, an extension coupling portion 1422, and an extension resonance portion 1423. The planar coupling portion 1411 is disposed in the sub-region 1110b and on the side edge E3 of the dielectric substrate 1100. The extension coupling portion 1412 is electrically connected to the plane coupling portion 1411 and vertically erected on the side edge E3. The planar directions of the planar coupling portion 1411 and the extended coupling portion 1412 are perpendicular to each other. The extension resonator portion 1413 is electrically connected to the extension coupling portion 1412. The plane direction of the extension resonator portion 1413 is perpendicular to the plane direction of the extension coupling portion 1412 and parallel to the plane direction of the ground plane 1200. The planar coupling portion 1421 is disposed in the sub-region 1120b and on the side E4 of the dielectric substrate 1100. The extension coupling portion 1422 is electrically connected to the plane coupling portion 1421 and vertically erected on the side edge E4. The planar directions of the planar coupling portion 1421 and the extended coupling portion 1422 are perpendicular to each other. The extension resonator portion 1423 is electrically connected to the extension coupling portion 1422 and the extension resonance portion 1413. The plane direction of the extension resonator portion 1423 is perpendicular to the plane direction of the extension coupling portion 1422 and parallel to the plane direction of the ground plane 1200.

The planar direction of the extended conductor 1430 is substantially parallel to the planar direction of the ground plane 1200. The extension conductor 1430 includes a front end extension 1431 and a rear end conductor portion 1432. The front end extension portion 1431 is electrically connected to the extension resonance portions 1413 and 1423 , and the rear end conductor portion 1432 is electrically connected to the front end extension portion 1431 .

In the embodiment of the present invention, the front end extension portion 1431, the rear end conductor portion 1432, and the extension resonance portions 1413 and 1423 are respectively rectangular, but the present invention Not limited to this. In other embodiments, the front end extension 1431, the rear end conductor portion 1432, and the extended resonating portions 1413 and 1423 may be triangular or other kinds of polygonal structures.

The extension coupling portion 1412 is erected along the folding line F1 at the edge of the extending resonance portion 1413, and the extension coupling portion 1422 is erected along the folding line F2 at the edge of the extending resonance portion 1423 so that the metal conductive cover of FIG. The plate 1400 is formed into a structure as shown in Fig. 1. In the embodiment of the present invention, the angle between the extension coupling portion 1412 and the extension resonance portion 1413 and the angle between the extension coupling portion 1422 and the extension resonance portion 1423 are both 90 degrees, but the present invention is not limited thereto.

Please return to Figure 1. In FIG. 1, the metallic conductive cover 1400 is not in direct contact with the antenna system device 1300. In detail, the rear end conductor portion 1432 is disposed between the extended radiating portions 1312b and 1322b, and is maintained between the rear end conductor portion 1432 and the extended radiating portion 1312b and between the rear end conductor portion 1432 and the extended radiating portion 1322b. gap. Further, the extension coupling portions 1412 and 1422 are respectively disposed on the planar radiation portions 1312a and 1322a, and the side edges of the extension resonance portions 1413 and 1423 maintain a gap with the lower ground plane 1200 and the planar radiation portions 1312a and 1322a.

In addition, please refer to Figure 3. The longitudinal direction of the plane coupling portions 1411 and 1421 is parallel to the longitudinal direction of the dielectric substrate 1100. In the embodiment of the present invention, the planar coupling portions 1411 and 1421 are connected to the dielectric substrate 1100, and the bonding manner may be soldering, conductive adhesive bonding or other bonding manner. The overall strength of the antenna system 1000 can be enhanced by the connection of the planar coupling portions 1411 and 1421 to the dielectric substrate 1100.

It should be noted that in other embodiments, the planar coupling portions 1411 and 1421 may not be provided. In this case, the extension coupling portions 1412 and 1422 may directly contact the dielectric substrate 1100 or may be spaced apart from the dielectric substrate 1100. However, the extension coupling portions 1412 and 1422 are not directly coupled to the ground plane 1200 and the antenna radiators 1310 and 1320, that is, the metal conductive cover 1400 and the antenna radiators 1310 and 1320 are spaced apart.

In the embodiment of the present invention, the signal feeding components 1314 and 1324 respectively feed the electrical signals to the radiating portions 1312 and 1322, so that the antenna radiators 1310 and 1320 generate electromagnetic wave radiation due to the resonance mechanism, and then capacitive coupling. In this manner, the electromagnetic signals are respectively fed to the plane coupling portions 1411 and 1421, so that the isolation devices 1410 and 1420 and the antenna radiators 1310 and 1320 respectively form an equivalent series circuit of the capacitance inductance, and a new inductance-capacitance resonance mode is provided. The plane coupling portion 1411 and the plane radiating portion 1312a have a spacing D1 and a spacing DL1. Therefore, the capacitance value in the inductive-capacitance resonant mode generated between the isolation device 1410 and the antenna radiator 1310 is determined by the pitch D1, DL1, and the plane coupling portion. The length of the side of the 1411 is determined. Similarly, the plane coupling portion 1421 and the plane radiating portion 1322b have a spacing D2 and DL2, so the capacitance value in the inductive-capacitance resonant mode generated between the isolation device 1420 and the antenna radiator 1320 is determined by the spacing D2, DL2, and plane. The length of the side of the coupling portion 1421 is determined. In addition, as shown in FIG. 4, the front end extension portion 1431 is a strip-shaped rectangle, so that the inductance value in the inductance-capacitance resonance mode generated between the isolation devices 1410 and 1420 and the antenna radiators 1310 and 1320 is defined by the front end extension portion 1431. The length is determined.

In the embodiment of the present invention, by appropriately designing the pitches D1, D2 The lengths of the DL1, DL2, the front end extensions 1431 and the lengths of the planar coupling portions 1411 and 1421, the coupling effect of the rear end conductor portions 1432 and the excited antenna radiators 1310 and 1320 can establish an appropriate inductance-capacitance resonance mode, reducing The antenna radiators 1310 and 1320 couple the current and increase the isolation of the antenna.

In addition, the invention is characterized in that the concept of energy coupling is applied to the side of the antenna system by simultaneously providing the isolation element and the antenna radiating element on the side of the antenna system, in addition to effectively isolating the electromagnetic interference between the short-distance antennas. In addition to improving the antenna isolation, it can effectively prevent the grounding terminal from forming a dipole antenna effect with the isolation component, thereby effectively increasing the bandwidth.

Referring to FIGS. 5A and 5B, respectively, a coupling current distribution diagram of the antenna system device 1300 and the metal conductive cover 1400 in the antenna system 1000 according to an embodiment of the present invention is shown. In the 5A and 5B graphs, the red portion has the highest current density and the blue portion has the lowest current density. As can be seen from the figures 5A and 5B, the antenna system 1000 of the embodiment of the present invention can guide the current distribution on the rear end conductor portion 1432, thereby improving the isolation of the antenna.

It should be noted that the above disclosed embodiments take two antennas as an example. In other embodiments, the antenna system can include four antennas or other numbers of antennas. For example, in an embodiment, the antenna system may additionally include an antenna system device (including two antenna radiators), and the metal conductive cover and the system ground plane have corresponding structures to provide the newly added antenna system device. Isolation and grounding. The two antenna system devices of this antenna system can be symmetrically arranged. Furthermore, the setting of other numbers of antennas can be completed by those skilled in the art according to the disclosure of the embodiments of the present invention, so other numbers of antennas The arrangement, as well as variations in the shape of the respective isolating device and ground plane, are also encompassed by the present invention.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

1000‧‧‧Antenna system

1100‧‧‧Media substrate

1200‧‧‧ ground plane

1300‧‧‧Antenna system installation

1310, 1320‧‧‧Antenna radiator

1400‧‧‧Metal conductive cover

1410, 1420‧‧‧Isolation device

1411, 1421‧‧‧ Planar Coupling Department

1412, 1422‧‧‧Extension coupling

1413, 1423‧‧‧ Extended Resonance

1430‧‧‧Extended conductor

1431‧‧‧ Front end extension

1432‧‧‧ Rear end conductor

Claims (10)

An antenna system with high isolation includes: a dielectric substrate; a ground plane disposed on the dielectric substrate, the ground plane defining a first space and a relative on the dielectric substrate a second space of a space; an antenna system device comprising: a first antenna radiator disposed in the first space, the first antenna radiator comprising: a first radiating portion disposed on the medium a first side of the substrate, the first radiating portion includes a first planar radiating portion and a first extending radiating portion, wherein the first planar radiating portion is electrically connected to the ground plane, and the first extended radiation And a first signal feeding component, wherein the positive end is electrically connected to the first radiating portion, and the negative end thereof is electrically connected to the grounding surface, the first signal The feeding component is configured to feed a first electrical signal to the first radiating portion; and a second antenna radiating body is disposed in the second space, the second antenna radiating body includes: a second radiation a second side of the dielectric substrate, the second radiation a second planar radiating portion and a second extended radiating portion, wherein the second planar radiating portion is electrically connected to the grounding surface, and the second extended radiating portion is vertically erected on the second side; a second signal feeding component, wherein a positive end thereof is electrically connected to the second radiating portion, and a negative end thereof is electrically connected to the grounding surface, the second The signal feeding component is configured to feed a second electrical signal to the second radiating portion; and a metal conductive cover is disposed above the dielectric substrate, the metal conductive cover comprises: a first isolation device, The first extension coupling portion is electrically connected to the first plane coupling portion, and the first extension coupling portion is perpendicular to the first plane coupling portion. And a first extension resonating portion electrically connected to the first extension coupling portion, wherein a plane direction of the first extension resonating portion is perpendicular to a plane direction of the first extension coupling portion and The ground plane is parallel to the plane; and a second isolation device includes: a second plane coupling portion disposed on the second space and located on the second side; a second extension coupling portion electrically connected to The second planar coupling portion is vertically erected on the second side; and a second extended resonant portion is electrically connected to the second extended coupling portion and the first extended resonant portion. The second extended resonance portion is flat A direction perpendicular to a direction parallel to the plane of the second extending portion is coupled to the planar direction of the ground plane; extending a conductor planar direction substantially parallel to the planar direction of the ground plane, and comprising: a front end extension electrically connected to the first extension resonating portion and the second extension resonating portion; and a rear end conductor portion electrically connected to the front end extension portion. The antenna system of claim 1, wherein the first planar coupling portion and the first antenna radiator have a gap between the second planar coupling portion and the second antenna radiator . The antenna system of claim 1, wherein a gap is formed between the rear end conductor portion and the first extension radiating portion and between the rear end conductor portion and the second extending radiating portion. The antenna system of claim 1, wherein the ground plane comprises: a first ground portion disposed on one side of the dielectric substrate along a width direction thereof and the first planar radiation portion and the second portion Between the planar radiation portions, and directly contacting the first planar radiation portion and the second planar radiation portion; and a second ground portion adjacent to the first ground portion, the second ground portion being disposed along the dielectric substrate The other side of the width direction is between the first planar radiating portion and the second planar radiating portion. The antenna system of claim 4, wherein the rear end conductor portion is rectangular, and the length of the rear end conductor portion in a direction parallel to the first side is smaller than the second ground portion along the parallel One of the lengths of one side direction, and the length of the rear end conductor portion in a direction parallel to the second side is smaller than a length of the second ground portion in a direction parallel to the second side. An antenna system with high isolation includes: a dielectric substrate; a ground plane disposed on the dielectric substrate, the ground plane defining a first space and a second on the dielectric substrate a space, a third space and a fourth space, the first space, the second space, the third space and the fourth space are oppositely located on four sides of the medium substrate; a multi-antenna system device, at least The first antenna radiator includes: a first radiating portion disposed on a first side of the dielectric substrate, the first radiation The portion includes a first planar radiating portion and a first extending radiating portion, wherein the first planar radiating portion is electrically connected to the grounding surface, and the first extending radiating portion is vertically erected on the first side; a first signal feeding component, wherein a positive end is electrically connected to the first radiating portion, and a negative end thereof is electrically connected to the grounding surface, and the first signal feeding component is configured to feed a first electrical signal To the first radiating portion; a second antenna radiator disposed on the first In the space, the second antenna radiator includes: a second radiating portion disposed on a second side of the dielectric substrate, the second radiating portion including a second planar radiating portion and a second extended radiating portion The second planar radiating portion is electrically connected to the grounding surface, and the second extended radiating portion is vertically erected on the second side; and a second signal feeding component, wherein a positive end is electrically connected to the second radiating portion, and a negative end thereof is electrically connected to the grounding surface, and the second signal feeding component is configured to feed a second electrical signal To the second radiating portion; a third antenna radiator disposed in the third space, the third antenna radiator comprising: a third radiating portion disposed on the first side, the third radiating portion comprising a third planar radiating portion and a third extended radiating portion, wherein the third planar radiating portion is electrically connected to the grounding surface, and the third extended radiating portion is vertically erected on the first side; and The third signal feeding component has a positive end electrically connected to the third radiating portion, and a negative end thereof is electrically connected to the grounding surface, and the third signal feeding component is configured to feed a third electrical signal to The third radiating portion is disposed in the fourth space, and the fourth antenna radiating body includes: a fourth radiating portion disposed on the second side, the fourth radiating portion includes a fourth planar radiating portion and a fourth extended radiating portion, wherein the fourth planar radiation Electrically connected to the grounding surface, and the fourth extending radiating portion is vertically erected on the second side; and a fourth signal feeding component, the positive end of which is electrically connected to the fourth radiating portion, and The negative terminal is electrically connected to the grounding surface, and the fourth signal feeding component is configured to feed a fourth electrical signal to the fourth radiating portion; a metal conductive cover disposed above the dielectric substrate, the metal conductive cover comprising: a first isolation device, comprising: a first planar coupling portion disposed in the first space and located on the first side a first extension coupling portion electrically connected to the first plane coupling portion, the first extension coupling portion is vertically erected on the first side edge, and a first extension resonance portion electrically connected to the first extension coupling portion a first extension coupling portion, the plane direction of the first extension resonance portion is perpendicular to a plane direction of the first extension coupling portion and parallel to a plane direction of the ground plane; and a second isolation device includes: a second plane coupling portion The second extension coupling portion is electrically connected to the second planar coupling portion, and the second extension coupling portion is vertically erected on the second side edge. And a second extension resonating portion electrically connected to the second extension coupling portion and the first extension resonating portion, wherein a plane direction of the second extension resonating portion is perpendicular to a plane direction of the second extension coupling portion and Plane of the ground plane Parallel; a third isolation device, comprising: coupling a third planar portion, and is disposed in the third space is located on the first side; coupling a third extension portion, electrically connected to the third coupling plane a third extension coupling portion is vertically erected on the first side edge; and a third extension resonance portion electrically connected to the third extension coupling portion, the planar direction of the third extension resonance portion The fourth extension coupling portion is perpendicular to the plane of the ground plane; the fourth isolation device includes: a fourth plane coupling portion disposed on the fourth space and located on the second side; The fourth extension coupling portion is electrically connected to the fourth plane coupling portion, the fourth extension coupling portion is vertically erected on the second side edge, and a fourth extension resonance portion electrically connected to the fourth extension portion a coupling portion and the third extension resonance portion, wherein a plane direction of the fourth extension resonance portion is perpendicular to a plane direction of the fourth extension coupling portion and parallel to a plane direction of the ground plane; and an extended conductor whose plane direction is substantially Parallel to a plane direction of the ground plane, and comprising: a first front end extension electrically connected to the first extension resonating portion and the second extension resonating portion; a second front end extension portion electrically connected to the Third extension a resonance portion and the fourth extension resonance portion; and a rear end conductor portion electrically connected to the first front end extension portion and the second front end extension portion and located at the first front end extension portion and the second front end extension portion between. The antenna system of claim 6, wherein the first planar coupling portion and the first antenna radiator, the second planar coupling portion and the second antenna radiator, the first A gap is formed between the three-plane coupling portion and the third antenna radiator and between the fourth plane coupling portion and the fourth antenna radiator. The antenna system of claim 6, wherein the rear end conductor portion and the first extension radiating portion, the rear end conductor portion and the second extending radiating portion, and the rear end conductor portion are There is a gap between the third extended radiating portions and between the rear end conductor portion and the fourth extending radiating portion. The antenna system of claim 6, wherein the ground plane comprises: a first ground portion disposed on one side of the dielectric substrate along a width direction thereof and the first planar radiation portion and the second portion Between the planar radiation portions, and directly contacting the first planar radiation portion and the second planar radiation portion; a second ground portion disposed on the other side of the dielectric substrate along the width direction thereof and radiating in the third plane Between the portion and the fourth planar radiating portion, and directly contacting the third planar radiating portion and the fourth planar radiating portion; and a third ground portion adjacent to the first ground portion and the second ground portion, The third ground portion is disposed between the first planar radiating portion, the second planar radiating portion, the third planar radiating portion, and the fourth planar radiating portion. The antenna system of claim 9, wherein the rear end conductor portion is rectangular.