TWI662744B - Controlable antenna unit and antenna module of electronic device - Google Patents

Abstract

A controllable antenna unit comprising a ground plane, a high frequency reflector, a low frequency reflector, a monopole antenna and a coupling radiator. The high frequency reflector has a reflective arm, a first diode, an extension and a first capacitor. The reflective arm is connected to the edge of the ground plane via the first diode, and the extension is connected to the reflective arm and connected to the edge of the ground plane via the first capacitor. The low frequency reflector has a reflective ring, a second diode and a second capacitor. The second diode and the second capacitor are electrically connected in parallel between the reflection ring and the edge of the ground plane, and the second diode is closer to the first capacitor than the second capacitor, and the first capacitor is closer to the first diode than the first diode Diode. The monopole antenna is located between the high frequency reflector and the low frequency reflector, and one end near the edge of the ground plane is the feed end. The coupling radiator is located between the monopole antenna and the low frequency reflector, and the grounding portion of the coupling radiator is closer to the second diode than the feeding end of the monopole antenna. The radiation pattern of the controllable antenna unit has controllable advantages.

Description

Controllable antenna unit and antenna module of electronic device

The invention relates to a wireless electronic device, and in particular to an antenna module of a controllable antenna unit and an electronic device.

The radiation pattern of the antenna varies depending on the basic working principle of the antenna. For example, a dipole antenna can generate an omnidirectional radiation pattern, and a patch antenna can generate a sideside. Radiation pattern. Various radiation field types have different applications. For example, an omnidirectional radiation field type is suitable for a terminal device, so that the terminal device can receive wireless signals in various directions. In contrast, base station antennas, such as wireless access point antennas, may need to be able to generate radiation patterns in a particular direction to enable wireless communication with terminal devices located at various specific locations. Traditionally, multiple antennas can be used, and based on beamforming techniques, a specific beam shape can be achieved for radiation field adjustment purposes. However, Beamforming technology requires complex algorithms and control circuits that increase the cost of the product. Therefore, in order to save costs, an antenna having a specific radiation field type can be correspondingly designed for the application of the wireless electronic device. However, such antennas designed for specific application needs cannot be used for other different usage requirements.

In order to solve the foregoing prior art problem, an embodiment of the present invention provides an antenna module of a controllable antenna unit and an electronic device.

Embodiments of the present invention provide a controllable antenna unit, including a ground plane, a high frequency reflector, a low frequency reflector, a monopole antenna, and a coupling radiator. The ground plane has a ground plane edge. The high frequency reflector has a reflecting arm, a first diode, an extension and a first capacitor, wherein at least a portion of the reflecting arm is perpendicular to an edge of the grounding surface, and the reflecting arm is connected to the anode of the first diode, the first diode The cathode of the body is connected to the edge of the ground plane, the first end of the extension is connected to the anode of the first diode, and the second end of the extension is connected to the edge of the ground plane via the first capacitor. The low frequency reflector has a reflection ring, a second diode and a second capacitor, and the second diode and the second capacitor are electrically connected in parallel between the reflection ring and the edge of the ground plane, wherein the anode of the second diode is connected to the reflection ring The cathode of the second diode is connected to the edge of the ground plane, and the second diode is closer to the first capacitor than the second capacitor, and the first capacitor is closer to the second diode than the first diode. The monopole antenna is located between the high frequency reflector and the low frequency reflector, and the end of the monopole antenna near the edge of the ground plane is the feed end, wherein the feed end is located between the first capacitor and the second diode. The coupling radiator is located between the monopole antenna and the low frequency reflector, has a grounding portion, the grounding portion is connected to the edge of the grounding surface, and the grounding portion is closer to the second diode body than the feeding end, wherein the operating frequency of the coupling radiator is lower than the single The operating frequency of the polar antenna.

An embodiment of the present invention provides an antenna module for an electronic device, which is used in an electronic device. The antenna module includes at least one controllable antenna unit, an application unit, a control unit, and a processing unit as described above. The application unit is connected to the wireless chip of the electronic device, and the wireless chip receives the received signal strength indication or the received data rate of the controllable antenna unit, and the application unit has an algorithm processing program. The control unit is connected to the first diode of the high frequency reflector and the second diode of the low frequency reflector to provide the first direct current The voltage is applied to the first diode and used to provide a second DC voltage to the second diode. The processing unit is connected to the application unit and the control unit, and the processing unit is controlled by the application unit, according to the received signal strength indication or the received data rate of the controllable antenna unit, and the algorithm processing program is used to determine whether the control unit turns on the first diode and The second diode is used to control the radiation pattern of the controllable antenna unit.

In summary, the embodiments of the present invention provide an antenna module for a controllable antenna unit and an electronic device, and a double-frequency reflector is realized by using a capacitor and a switch (conducting or non-conducting) state of the controllable diode. High industrial application value. Moreover, by implementing an algorithm of the multi-antenna system in an application unit outside the wireless chip to replace the traditional method of analyzing the signal strength by only the wireless chip, the rate of wireless data transmission of the electronic device having the antenna module is improved.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings The scope is subject to any restrictions.

11, 311‧‧‧ ground plane

111‧‧‧Flange of the grounding surface

12, 312‧‧‧ high frequency reflector

13, 313‧‧‧ low frequency reflector

14, 314‧‧‧ monopole antenna

15, 315‧‧‧ coupling radiator

121‧‧‧reflecting arm

122‧‧‧Extension

122a‧‧‧ First end of the extension

122b‧‧‧ second end of the extension

131‧‧‧Reflective ring

151‧‧‧ Grounding Department

D1‧‧‧First Diode

C1‧‧‧first capacitor

D2‧‧‧ second diode

C2‧‧‧second capacitor

141‧‧‧Feeding end

142‧‧‧First bend

152‧‧‧Second bend

200‧‧‧Substrate

P1, P2, P4, P5‧‧‧ surface adhesive components

P3‧‧‧ coaxial cable

X, Y, Z‧‧‧ axes

201, 202, 31‧‧‧ controllable antenna unit

A1, A2, A3, A4, B1, B2, B3, B4‧‧‧ radiation field

D3‧‧‧ third diode

32‧‧‧ Application Unit

33‧‧‧Control unit

34‧‧‧Processing unit

4‧‧‧Wireless chip

FIG. 1 is a schematic structural diagram of a controllable antenna unit according to an embodiment of the present invention.

2 is a structural diagram of a controllable antenna unit of FIG. 1 in practical use.

FIG. 3 is a schematic diagram of a controllable antenna unit provided in an electronic device according to an embodiment of the present invention.

4A is a X-Z plane radiation pattern diagram of a controllable antenna unit operating at 2.44 GHz according to an embodiment of the present invention.

FIG. 4B is a controllable antenna unit according to an embodiment of the present invention 2.44 GHz X-Y plane radiation pattern.

FIG. 5A is a diagram showing an X-Z plane radiation pattern of a controllable antenna unit operating at 5.4 GHz according to an embodiment of the present invention.

FIG. 5B is a diagram showing the X-Y plane radiation pattern of the controllable antenna unit operating at 5.4 GHz according to an embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a controllable antenna unit according to another embodiment of the present invention.

FIG. 7 is a functional block diagram of an antenna module and a wireless chip of an electronic device according to another embodiment of the present invention.

The present embodiment provides a controllable antenna unit. Referring to FIG. 1, the controllable antenna unit includes a ground plane 11, a high frequency reflector 12, a low frequency reflector 13, a monopole antenna 14, and a coupling radiator 15. The ground plane 11 has a ground plane edge 111. The high frequency reflector 12 has a reflection arm 121, a first diode D1, an extension portion 122 and a first capacitor C1, wherein at least a portion of the reflection arm 121 is perpendicular to the ground plane edge 111, and the reflection arm 121 is connected to the first diode The anode of the body D1, the cathode of the first diode D1 is connected to the ground plane edge 111. The first end 122a of the extension portion 122 is connected to the anode of the first diode D1, and the second end 122b of the extension portion 122 is connected to the ground plane edge 111 via the first capacitor C1. The low frequency reflector 13 has a reflection ring 131, a second diode D2 and a second capacitor C2. The second diode D2 and the second capacitor C2 are electrically connected in parallel between the reflection ring 131 and the ground plane edge 111, wherein the second The anode of the diode D2 is connected to the reflection ring 131, the cathode of the second diode D2 is connected to the ground plane edge 111, and the second diode D2 is closer to the first capacitor C1 than the second capacitor C2, and the first capacitor C1 is compared with the first capacitor C1. A diode D1 is closer to the second diode D2. Monopole antenna 14 bits Between the high frequency reflector 12 and the low frequency reflector 13, one end of the monopole antenna 14 near the edge of the ground plane 111 is a feed end 141, wherein the position of the feed end 141 is located at the first capacitor C1 and the second diode Between D2, the shape of the monopole antenna 14 in FIG. 1 is for illustrative purposes only, and the present invention does not thus define the shape of the monopole antenna 14. The coupling radiator 15 is located between the monopole antenna 14 and the low frequency reflector 13, the coupling radiator 15 has a grounding portion 151, the grounding portion 151 is connected to the grounding surface edge 111, and the grounding portion 151 is closer to the second diode than the feeding end 141. D2, wherein the operating frequency of the coupling radiator 15 is lower than the operating frequency of the monopole antenna 14, and the shape of the coupling radiator 15 in FIG. 1 is merely for illustrative purposes, and the present invention does not thereby define the coupling radiator 15 shape.

In detail, the position of the second diode D2 is located between the first capacitor C1 and the second capacitor C2, and the position of the first capacitor C1 is located between the first diode D1 and the second diode D2. The position of the feed terminal 141 is between the first capacitor C1 and the second diode D2. The position of the ground portion 151 is located between the second diode D2 and the feed end 141. In other words, the arrangement of the first diode D1, the first capacitor C1, the feeding end 141, the grounding portion 151, the second diode D2, and the second capacitor C2 along the edge 111 of the ground plane is first and second. The polar body D1, the first capacitor C1, the feeding end 141, the grounding portion 151, the second diode D2 and the second capacitor C2 (for example, the figures are arranged from right to left in order, and the opposite design can be reversed Come over to arrange from left to right). The feeding end 141 is generally used to connect the center wire of the coaxial cable, and the outer conductor of the coaxial cable is connected to the edge of the grounding surface 111. The feeding method of the coaxial cable is a conventional technique, and will not be described again.

Next, the reflection function is described. In the high-frequency reflector 12, the first capacitor C1 is in a state in which the extension portion 122 is short-circuited to the ground 11 in the case of the radio frequency signal. When the first diode D1 is turned on, the first two are used. The length of the reflection arm 121 short-circuited to the ground plane 11 by the pole body D1 is preferably equivalent to the wave corresponding to the operating frequency of the monopole antenna 14. The longer quarter causes the reflecting arm 121 to reflect the electromagnetic wave of the monopole antenna 14; conversely, when the first diode D1 is not conducting, the extending portion 122 extends the grounding path of the reflecting arm 121 so that the high frequency reflector 12 does not The electromagnetic waves of the monopole antenna 14 are reflected. In terms of the low frequency reflector 13, the circumferential length of the reflection ring 131 is preferably one-half the wavelength corresponding to the operating frequency of the coupling radiator 15. Moreover, in the case of the radio frequency signal, the reflection ring 131 is always short-circuited to the ground plane 11 via the second capacitor C2, and when the second diode D2 is not turned on, the reflection ring 131 is short-circuited to the ground plane 11 via the second capacitor C2 to reflect The electromagnetic wave of the coupling body 15 is coupled; when the second diode D2 is turned on, the reflection ring 131 is short-circuited to the ground plane 11 via the second diode D2 and the second capacitor C2 so as not to reflect the electromagnetic wave of the coupling radiator 15 . Preferably, the extension 122 is parallel to the ground plane edge 111, and preferably the first end 122a of the extension 122 is directly connectable to the reflective arm 121. The extension portion 122 is used to extend the grounding path. The extension portion 122 may not be completely parallel to the ground plane edge 111, and may also have a bend (or multiple bends).

Furthermore, the structure of the reflection ring 131 is used to enhance the lateral reflection concentration of the low-frequency reflector 13 in the direction parallel to the edge 111 of the ground plane. The direction of the ground plane edge 111 in FIG. 1 is parallel to the X-axis, and the reflection ring 131 is used. To increase the concentration of reflection towards the negative X-axis. The shape of the reflection ring 131 of the embodiment of the present invention is preferably a rectangular ring, but the shape is not limited to a ring, a rectangular ring, a polygonal ring or a triangular ring.

Based on the architecture of FIG. 1, please refer to FIG. 2. FIG. 2 is a structural diagram of the controllable antenna unit of FIG. 1 in practical use. The ground plane 11, the high frequency reflector 12, the low frequency reflector 13, the monopole antenna 14, and the coupling radiator 15 may be disposed on the substrate 200, such as a printed circuit board. At least a portion of the reflective arm 121 is perpendicular to the ground plane edge 111. The first diode D1 is realized by the surface adhesive element P1, and the first capacitance C1 is realized by the surface adhesive element P2. The feed terminal 141 performs signal feed with the coaxial cable P3. Table The surface adhesive component P4 is the second diode D2, and the surface adhesive component P5 is the second capacitor C2. The DC wire for controlling the conduction state of the first diode D1 and the second diode D2 may be directly connected to the anode and the cathode of the diode, for example, and the DC wire connecting the diode is omitted in FIG. 2, and the second wire is turned on. The polar body is provided with a sufficient turn-on voltage, and when the voltage is lower than the turn-on voltage, the diode is not turned on. Moreover, in FIG. 2, one end of the monopole antenna 14 away from the ground plane edge 111 has a first bent portion 142, and the first bent portion 142 is parallel to the ground plane edge 111. The coupling radiator 15 further has a second bending portion 152. The one end of the grounding portion 151 away from the grounding surface edge 111 is connected to the second bending portion 152. The second bending portion 152 is parallel to the grounding surface edge 111, wherein the second bending portion is 152 is farther away from the grounding surface edge 111 than the first bending portion 141, and the second bending portion 152 and the first bending portion 141 extend toward each other, and the first bending portion 141 is located at the grounding surface edge 111 and the second bending portion Between the folds 151.

Referring to FIG. 3, the electronic device of FIG. 3 is a notebook computer having two controllable antenna units 201 and 202 disposed above the screen. For the working principle of the controllable antenna unit 201, refer to the description of the foregoing embodiment of FIG. The controllable antenna unit 201 and the controllable antenna unit 202 are symmetrical to each other, and the functions of the radiation pattern control are also symmetrical to each other. Since the controllable antenna unit of the present invention can improve the radiation field pattern of the conventional antenna and is susceptible to the influence of the ground plane (for example, the screen of the electronic device of FIG. 3 and its associated circuit board is grounded for the antenna), it is easier to control. The purpose of the radiation field type. The radiation field type of the controllable antenna unit 201 disposed on the upper edge of the left side of the screen will be described below. For the controllable antenna unit 201, the operating frequency of the monopole antenna (14) is set to 5 GHz, and the coupling radiator (15) is used. The operating frequency is 2.44 GHz. 4A is a radiation pattern of the X-Z plane at a frequency of 2.44 GHz. The radiation pattern A1 is a radiation pattern when the high frequency reflector (12) and the low frequency reflector (13) are not reflected, and the radiation pattern A2 is It is the radiation field type when the low frequency reflector (13) produces reflection. Comparing the radiation pattern A2, A1, the radiation pattern A2 shows the effect of the low frequency reflector (13) reflecting the radiant energy in the negative X direction, wherein the low frequency reflector (13) produces a reflection effect, the second two The polar body (D2) is in a non-conducting state, and the capacitance value of the second capacitor (C2) is, for example, at least greater than 5 pF. 4B is a radiation pattern of the XY plane at a frequency of 2.44 GHz. The radiation pattern A3 is a radiation pattern when the high frequency reflector (12) and the low frequency reflector (13) are not reflected, and the radiation pattern A4 is It is the radiation field type when the low frequency reflector (13) produces reflection. Comparing the radiation pattern A4, A3, the radiation pattern A4 shows the effect of the low frequency reflector (13) reflecting the radiant energy towards the negative X direction. Next, FIG. 5A is a radiation pattern of the XZ plane at a frequency of 5.4 GHz. The radiation pattern B1 is a radiation pattern when the high frequency reflector (12) and the low frequency reflector (13) are not reflected. Type B2 is the radiation pattern when the high frequency reflector (12) produces a reflection. Comparing the radiation field type B2, B1, the radiation field type B2 shows the effect of the high frequency reflector (12) reflecting the radiation energy in the positive X direction, wherein the high frequency reflector (12) produces a reflection effect, A diode (D1) is in a conducting state. 5B is a radiation pattern of the XY plane at a frequency of 5.4 GHz. The radiation pattern B3 is a radiation pattern when both the high frequency reflector 12 and the low frequency reflector 13 do not reflect, and the radiation pattern B4 is a high frequency reflection. The radiation pattern of the device 12 when it is reflected. Comparing the radiation pattern B4, B3, the radiation pattern B4 shows the effect of the high frequency reflector 12 reflecting the radiant energy in the positive X direction.

In another embodiment, referring to FIG. 6, based on the architecture of FIG. 1, the low frequency reflector 13 further includes a third diode D3, and the third diode D3 is electrically connected in parallel with the second capacitor C2, and the third diode The anode of the body D3 is connected to the reflection ring 131, the cathode of the third diode D3 is connected to the ground plane edge 111, and the third diode D3 is further away from the second diode D2 than the second capacitor C2, wherein the third diode D3 and the second diode D2 are simultaneously turned on or The person is not at the same time. The third diode D3 can be used to further enhance the lateral reflection concentration of the low frequency reflector 13 in the direction parallel to the edge 111 of the ground plane, that is, to increase the concentration concentration of the negative X-axis.

Next, an embodiment of the present invention further provides an antenna module for an electronic device, where the antenna module includes at least one controllable antenna unit, an application unit, a control unit, and a processing unit according to the foregoing embodiments. Please refer to FIG. 7. FIG. 7 is a functional block diagram of an antenna module and a wireless chip of the electronic device. The electronic device with the antenna module is, for example but not limited to, a notebook computer, a laptop computer, a tablet computer, an integrated computer, a smart TV, a small base station, a wireless router, or a smart phone. In FIG. 7, an antenna module for an electronic device includes two controllable antenna units 31, an application unit 32, a control unit 33, and a processing unit 34. The controllable antenna unit 31 includes a ground plane 311, a high frequency reflector 312, a low frequency reflector 313, a monopole antenna 314, and a coupling radiator 315. For details of the technical features, refer to the previous embodiment. The application unit 32 is connected to the wireless chip 4 of the electronic device, and receives the Received Signal Strength Indication (RSSI) or the received data rate of the controllable antenna unit 31 by the wireless chip 4, and the application unit 32 has an algorithm processing. program. The control unit 33 is connected to the first diode of the high frequency reflector 312 (refer to the first diode D1 of the embodiment of FIG. 1) and the second diode of the low frequency reflector 313 (refer to the second two of the embodiment of FIG. 1). The pole body D2) is configured to provide a first DC voltage to the first diode and to provide a second DC voltage to the second diode. The control unit 33 generates a first DC voltage and a second DC voltage, and is controlled by the processing unit 34 to determine whether to output the first DC voltage and the second DC voltage. The control unit 33 and the processing unit 34 can be implemented, for example, by a microprocessor (MCU). The processing unit 34 is connected to the application unit 32 and the control unit 33. The processing unit 34 is controlled by the application unit 32, and according to the received signal strength indication or reception of the controllable antenna unit 31. The data rate is matched with the algorithm processing program to determine whether the control unit 33 turns on the first diode and the second diode to control the radiation pattern of the controllable antenna unit 31. In the present embodiment, the application unit 32 is, for example, a computing platform (for example, a personal computer), and the algorithm processing program of the application unit 32 is an application program installed in the operating system of the computing platform.

Furthermore, referring to FIG. 6 and FIG. 7 together, the low frequency reflector 313 includes a second diode D3 in addition to the second diode D2, and the control unit 33 is connected to the third diode D3 of the low frequency reflector 313. And to provide a second DC voltage to the third diode D3. In addition to controlling whether the first diode D1 and the second diode D2 are turned on, the control unit 33 controls whether the third diode D3 is turned on to control the radiation pattern of the controllable antenna unit 31.

The application example of the antenna module applied to the electronic device is described below. When the number of the controllable antenna units is plural, the application unit 32 selects the plurality of controllable antenna units 31 with the highest received signal strength indication or has the receiving. The largest data rate is the designated antenna, and the designated wireless antenna 4 selects the designated antenna for wireless transmission of data. Further, the application unit 32 selects one of the plurality of controllable antenna units 31 that has the received signal strength indication or the one with the highest received data rate as the standby antenna, and specifies the wireless chip in a set transmission period. 4 selecting (previously set) the designated antenna for wireless transmission of data, and inserting at least one test interval segment during the transmission period, and using the standby antenna for wireless transmission of data in the test interval segment; wherein, when the wireless chip 4 When the received data rate obtained in the test interval is greater than the received data rate in the transmission period, the application unit 32 designates the standby antenna as the updated designated antenna.

In summary, the controllable antenna unit provided by the embodiment of the present invention The antenna module of the electronic device realizes a dual-frequency reflector by using a capacitor and a switch (conducting or non-conducting) state of the controllable diode, and uses a reflection ring to increase the lateral reflection concentration parallel to the edge of the ground plane, Has a high industrial application value. Moreover, the algorithm of the multi-antenna system is realized by the application unit outside the wireless chip to replace the traditional method of analyzing the signal strength by only the wireless chip, thereby improving the wireless data transmission rate of the electronic device with the antenna module. In particular, it can be applied to an electronic device using a plurality of controllable antenna elements, and the above is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

Claims (10)

A controllable antenna unit includes: a ground plane having a ground plane edge; a high frequency reflector having a reflector arm, a first diode, an extension and a first capacitor, wherein the reflector arm At least one portion is perpendicular to the edge of the grounding surface, the reflecting arm is connected to an anode of the first diode, a cathode of the first diode is connected to the edge of the grounding surface, and a first end of the extending portion is connected to the anode a second end of the first diode, the second end of the extension is connected to the edge of the ground plane via the first capacitor; a low frequency reflector having a reflection ring, a second diode and a second capacitor, The second diode and the second capacitor are electrically connected in parallel between the reflective ring and the edge of the ground plane, wherein an anode of the second diode is connected to the reflective ring, and a cathode of the second diode Connecting the edge of the ground plane, and the second diode is closer to the first capacitor than the second capacitor, the first capacitor being closer to the second diode than the first diode; a monopole antenna, Located between the high frequency reflector and the low frequency reflector, the monopole antenna is One end of the edge of the grounding surface is a feeding end, wherein the feeding end is located between the first capacitor and the second diode; and a coupling radiator is located at the monopole antenna and the low frequency reflector Between the grounding portion, the grounding portion is connected to the edge of the grounding surface, the grounding portion is closer to the second diode than the feeding end, wherein the operating frequency of the coupling radiator is lower than that of the monopole antenna Operating frequency. The controllable antenna unit of claim 1, wherein the reflective arm reflects electromagnetic waves of the monopole antenna when the first diode is turned on; and the extension portion when the first diode is not conducting Extending a ground path of the reflective arm; wherein when the second diode is not conducting, the reflective ring is short-circuited to the ground plane via the second capacitor to reflect the An electromagnetic wave coupled to the radiator; when the second diode is turned on, the reflection ring is short-circuited to the ground plane via the second diode and the second capacitor. The controllable antenna unit of claim 1, wherein a length of the reflective arm short-circuited to the ground plane by the first diode is equivalent to a quarter of a wavelength corresponding to an operating frequency of the monopole antenna In one of the embodiments, the circumferential length of the reflection ring is equivalent to one-half of the wavelength corresponding to the operating frequency of the coupling radiator. The controllable antenna unit of claim 1, wherein the reflective ring is configured to raise the lateral reflection concentration of the low frequency reflector parallel to the edge of the ground plane. The controllable antenna unit of claim 1, wherein the low frequency reflector further comprises a third diode, the third diode being electrically connected in parallel with the second capacitor, the third diode An anode is connected to the reflective ring, a cathode of the third diode is connected to the edge of the ground plane, and the third diode is farther away from the second diode than the second capacitor, wherein the third diode Simultaneously being turned on or not simultaneously with the second diode. An antenna module for an electronic device, comprising: an electronic device, the antenna module comprising: at least one controllable antenna unit according to claim 1; an application unit, a wireless chip connected to the electronic device, Receiving, by the wireless chip, a received signal strength indicator or a received data rate of the controllable antenna unit, the application unit has an algorithm processing program; a control unit connecting the first diode of the high frequency reflector and the low frequency reflection The second diode of the device is configured to provide a first DC voltage to the first diode and to provide a second DC voltage to the second diode; a processing unit, connected to the application unit and the control unit, the processing unit is controlled by the application unit, according to the received signal strength indication or the received data rate of the controllable antenna unit, and the algorithm processing program is used to determine the control Whether the unit turns on the first diode and the second diode to control a radiation pattern of the controllable antenna unit. The antenna module of the electronic device of claim 6, wherein the reflective arm reflects electromagnetic waves of the monopole antenna when the first diode is turned on; and when the first diode is not turned on, Extending the grounding path of the reflective arm; wherein when the second diode is not conducting, the reflective ring is short-circuited to the ground plane via the second capacitor to reflect electromagnetic waves of the coupling radiator; when the second diode When the body is turned on, the reflection ring is short-circuited to the ground plane via the second diode and the second capacitor. The antenna module of the electronic device of claim 6, wherein a length of the reflective arm short-circuited to the ground plane by the first diode is equivalent to a wavelength corresponding to an operating frequency of the monopole antenna One quarter of the structure; wherein the structure of the reflection ring is used to raise the lateral reflection concentration of the low frequency reflector parallel to the edge of the ground plane, and the circumferential length of the reflection ring is equivalent to the operating frequency of the coupling radiator One-half of the corresponding wavelength. The antenna module of the electronic device of claim 6, wherein the number of the controllable antenna units is plural, and the application unit selects the ones of the controllable antenna units that have the highest received signal strength indication or has The receiving data rate is a specified antenna, and the wireless chip is selected to select the designated antenna for wireless transmission of data; wherein the application unit selects the control antenna unit having the received signal strength indication or the receiving data. The next highest rate is a standby antenna, and the wireless chip is designated to select the designated antenna for wireless transmission of data during a transmission period, and at least one test interval segment is inserted in the transmission period, and is utilized in the test interval. The standby antenna is configured to wirelessly transmit data; wherein, when the received data rate obtained by the wireless chip in the test interval is greater than the received data rate in the transmission period, the application unit specifies the standby antenna as the updated designated antenna . The antenna module of the electronic device of claim 6, wherein the electronic device is a notebook computer, a laptop computer, a tablet computer, an integrated computer, a smart TV, a small base station, a wireless router, or a smart phone.