Wireless transceiver

Abstract

The invention relates to the technical field of data transceivers, in particular to a wireless transceiver which comprises a circuit board, an antenna and a current counteracting element. The circuit board includes a first face. The antenna comprises a feed-in end, and the antenna is connected to the first surface of the circuit board through the feed-in end. The current counteracting element comprises a grounding end, the current counteracting element is connected to the first face of the circuit board through the grounding end, and the current counteracting element and the antenna are arranged on the same side of the circuit board. The antenna resonates out of a frequency band, the length of the antenna is 1 / 4 of the wavelength of the frequency band, and the length of the current offset element is 1 / 4 of the wavelength of the frequency band.

Description

Technical Field

[0001] The present invention relates to a wireless transceiver, and more particularly to a wireless transceiver capable of providing an antenna radiation pattern that is more suitable for use. Background Art

[0002] There are currently two types of wireless transceivers for wireless headphones. One is a long USB wireless transceiver, in which the main body of the transceiver extends along the direction of the USB, like the shape of a USB flash drive. Its advantage is a good transmission and reception distance, but its disadvantage is that it is too long and is easily broken when inserted into a laptop because it is too protruding.

[0003] Therefore, in recent years, the design of wireless transceivers has mostly been changed to a horizontal style. The main body of the transceiver extends in a direction perpendicular to the connector. When inserted into a laptop, the whole body will not be too protruding, and the appearance is more in line with market demand. However, its disadvantage is that due to the limitation of the appearance, the antenna design space is limited, and the blind spot of the antenna radiation field will be in the direction of the user, causing a blind spot for transmission and reception. Summary of the invention

[0004] The present application provides a wireless transceiver, which can provide an antenna radiation pattern that is more suitable for use.

[0005] An embodiment of the present application provides a wireless transceiver, including a circuit board, an antenna and a current compensation element. The circuit board includes a first surface. The antenna includes a feed end, and the antenna is connected to the first surface of the circuit board through the feed end. The current compensation element includes a ground end, and the current compensation element is connected to the first surface of the circuit board through the ground end, and the current compensation element and the antenna are arranged on the same side of the circuit board. The antenna resonates out of the frequency band, the length of the antenna is 1 / 4 times the wavelength of the frequency band, and the length of the current compensation element is 1 / 4 times the wavelength of the frequency band.

[0006] In one embodiment, the distance between the antenna and the current compensation element is between 0.5 mm and 1 / 2 wavelength of the frequency band.

[0007] In one embodiment, the difference between the width of the antenna and the width of the current compensation element is less than or equal to 10%.

[0008] In one embodiment, each of the width of the antenna and the width of the current compensation element is between 0.2 mm and 3 mm.

[0009] In one embodiment, the above-mentioned circuit board includes a second surface relative to the first surface and a side surface located between the first surface and the second surface, and one of the antenna and the current compensation element includes a first section, a second section and a third section that are connected, and are U-shaped, and the first section is at least partially flat against the first surface, the second section faces the side, and the third section is at least partially facing the second surface.

[0010] In one embodiment, the other of the antenna and the current cancellation element comprises a fourth segment, a fifth segment and a sixth segment connected to each other, wherein the fourth segment is at least partially flat against the first surface, the fifth segment faces the side surface, and the sixth segment is at least partially facing the second surface.

[0011] In one embodiment, the other of the antenna and the current cancellation element comprises a fourth section, a fifth section and a sixth section connected to each other, the fourth section is at least partially flat against the first surface, the fifth section is located beside the side surface, and the sixth section passes through the U-shape.

[0012] In one embodiment, the other of the antenna and the current cancellation element comprises a meandering section disposed on the first surface.

[0013] In one embodiment, the antenna or current canceling element having a meandering section includes a section extending beyond the second surface or the circuit board.

[0014] In one embodiment, the above-mentioned circuit board includes a second surface relative to the first surface and a side surface located between the first surface and the second surface, and at least one of the antenna and the current compensation element includes a connected first section, a second section, a third section and a fourth section, the first section stands on the first surface, the second section is at least partially facing the first surface, the third section is facing the side surface, and the fourth section is at least partially facing the second surface.

[0015] Based on the above, the antenna of the wireless transceiver of the present invention is connected to the first surface of the circuit board through the feed end. The wireless transceiver also includes a current compensation element, which is connected to the first surface of the circuit board through the ground end, and the current compensation element and the antenna are arranged on the same side of the circuit board. The antenna resonates out of the frequency band, the length of the antenna is 1 / 4 times the wavelength of the frequency band, and the length of the current compensation element is 1 / 4 times the wavelength of the frequency band. Such a design can make the current in a certain direction (for example, the current parallel to the long side of the circuit board) generated by the antenna on the circuit board be offset by the current compensation element, so that the current in another direction (for example, the current perpendicular to the long side of the circuit board) is left on the circuit board, thereby generating different polarization current distributions (for example, orthogonal polarization current distributions), thereby exciting different antenna field patterns (for example, orthogonal antenna field patterns), and can improve the probability that the dead angle of the antenna radiation field pattern occurs in the direction of the user, thereby improving the transceiver effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 FIG. 4 is a three-dimensional schematic diagram of a wireless transceiver according to an embodiment of the present invention.

[0017] Figure 2 for Figure 1 Side view of.

[0018] Figure 3 for Figure 1 Equivalent circuit diagram of the antenna and current cancellation elements.

[0019] Figure 4 For only Figure 1 Antenna and Figure 1 Radiation pattern of the antenna and current cancellation element.

[0020] Figure 5 FIG. 4 is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present invention.

[0021] Figure 6 for Figure 5 Side view of.

[0022] Figure 7 For only Figure 5 Antenna and Figure 5 Radiation pattern of the antenna and current cancellation element.

[0023] Figure 8 FIG. 4 is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present invention.

[0024] Fig. 9 for Figure 8 Top view of the .

[0025] Fig.10 FIG. 4 is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present invention.

[0026] Fig.11 for Fig.10 Top view of the .

[0027] Description of reference numerals:

[0028] Distance D, width W1, W2, wireless transceiver 100, 100a, 100b, 100c, circuit board 110, side surfaces 111, 113, 116, first surface 112, second surface 114, connector 118, antenna 120, 120a, 120b, 120c, feeding end 122, current compensation element 130, 130a, 130b, 130c, ground end 132, first section 141, second section 142, third section 143, fourth section 144, fifth section 145, sixth section 146, seventh section 147, eighth section 148, meandering section 150, section 152, chip 160. DETAILED DESCRIPTION

[0029] Figure 1 It is a three-dimensional schematic diagram of a wireless transceiver according to an embodiment of the present invention. Figure 2 yes Figure 1 See Figure 1 and Figure 2The wireless transceiver 100 of this embodiment includes a circuit board 110, an antenna 120 and a current compensation element 130. In this embodiment, the circuit board 110 is rectangular, and the connector 118 is disposed on a side surface 111 on a long side of the circuit board 110. Such a design allows the wireless transceiver 100 to not protrude too much from the surface of the device when the connector 118 is inserted into the connected device (e.g., a notebook computer), thereby reducing the probability of being damaged by collision. The connector 118 is, for example, a USB type C or a lightening connector, and can provide a forward and reverse plugging feature.

[0030] The circuit board 110 includes a first surface 112 and a second surface 114 that are opposite to each other, and a side surface 116 located between the first surface 112 and the second surface 114. The side surface 116 is, for example, a side surface on a short side of the circuit board 110. The current canceling element 130 and the antenna 120 are disposed on the same side of the circuit board 110, for example, the side surface 116 on the short side. Of course, in one embodiment, the current canceling element 130 and the antenna 120 may also be disposed on another side surface 113 of the circuit board 110, as long as they are on the same side of the circuit board 110.

[0031] The antenna 120 includes a feeding end 122, and the antenna 120 is connected to the first surface 112 of the circuit board 110 through the feeding end 122. In this embodiment, the antenna 120 includes a first section 141, a second section 142, a third section 143, and a fourth section 144 that are connected. The first section 141 is connected to the feeding end 122 and stands on the first surface 112, at least a portion of the second section 142 faces the first surface 112, the third section 143 faces the side surface 116, and at least a portion of the fourth section 144 faces the second surface 114.

[0032] The current compensation element 130 includes a ground terminal 132. The current compensation element 130 is connected to the first surface 112 of the circuit board 110 through the ground terminal 132 and is connected to the ground plane (not shown) of the circuit board 110. The current compensation element 130 can be a single conductor set on the circuit board 110 by welding, or a combination of a short-circuit element and a conductor, or a combination of a pogo pin and a flexible circuit board or LDS. The form of the current compensation element 130 is not limited.

[0033] In this embodiment, the shape of the current cancelling element 130 is the same as that of the antenna 120. The current cancelling element 130 includes a fifth segment 145, a sixth segment 146, a seventh segment 147 and an eighth segment 148 connected to each other. The fifth segment 145 is connected to the ground terminal 132 and stands on the first surface 112. At least a portion of the sixth segment 146 faces the first surface 112. The seventh segment 147 faces the side surface 116. At least a portion of the eighth segment 148 faces the second surface 114. Of course, the shape of the current cancelling element 130 may also be different from that of the antenna 120, and is not limited to the figure.

[0034] In this embodiment, the first section 141 of the antenna 120 stands on the first surface 112, and the second section 142 is suspended. The fifth section 145 of the current compensation element 130 stands on the first surface 112, and the sixth section 146 is suspended. Therefore, the space between the second section 142 and the sixth section 146 and the first surface 112 can be used to arrange electronic components (not shown), so that the layout of the circuit board 110 on the first surface 112 is more flexible.

[0035] The antenna 120 resonates a frequency band, which is, for example, 2.4 GHz, but is not limited thereto. The length of the antenna 120 (i.e., the total length of the first section 141, the second section 142, the third section 143, and the fourth section 144) is 1 / 4 times the wavelength of this frequency band, and the length of the current canceling element 130 (i.e., the total length of the fifth section 145, the sixth section 146, the seventh section 147, and the eighth section 148) is 1 / 4 times the wavelength of this frequency band. The shape of the current canceling element 130 and the antenna 120 can be different, as long as the length meets the 1 / 4 times the wavelength of this frequency band mentioned above.

[0036] Such a design allows the current in a certain direction (for example, the current parallel to the long side of the circuit board 110) generated by the antenna 120 on the circuit board 110 to be offset by the current generated by the current offset element 130, so that the current in another direction (for example, the current perpendicular to the long side of the circuit board 110) remains on the circuit board 110, thereby generating different polarization current distributions (for example, orthogonal polarization current distributions), thereby stimulating different antenna field patterns (for example, orthogonal antenna field patterns), and improving the probability that the dead angle of the antenna radiation field pattern occurs in the direction of the user (near the side 113 or the side 116), thereby reducing the possibility of dead angles in transmission and reception.

[0037] It is worth mentioning that in this embodiment, the current cancelling element 130 is closer to the connector 118 than the antenna 120, but the positions of the antenna 120 and the current cancelling element 130 can be interchanged. That is, in one embodiment, the antenna 120 can be closer to the connector 118 than the current cancelling element 130.

[0038] In addition, in this embodiment, the distance D between the antenna 120 and the current compensation element 130 is between 0.5 mm and 1 / 2 wavelength of this frequency band to provide a radiation pattern compensation effect. In one embodiment, the distance D is 5 mm, but it is not limited thereto.

[0039] In addition, the difference between the width W1 of the antenna 120 and the width W2 of the current canceling element 130 is less than or equal to 10%, and such a design can have a better impedance matching effect. Each of the width W1 of the antenna 120 and the width W2 of the current canceling element 130 is between 0.2 mm and 3 mm. In one embodiment, the width W1 and the width W2 are both 2 mm, but this is not a limitation.

[0040] Figure 3 yes Figure 1 The equivalent circuit diagram of the antenna and current cancellation element. Figure 3 In this embodiment, the antenna 120 is connected to the chip 160, and the current compensation element 130 is grounded. The antenna 120 is a single-feed antenna, which has the advantages of small size and simple design.

[0041] Figure 4 Yes only Figure 1 Antenna and Figure 1 The radiation pattern of the antenna and the current cancellation element. It should be noted that Figure 4 The figure shows the radiation pattern when the wireless transceiver 100 is inserted into the right port of the notebook computer with the connector 118 and placed at the center of the circle from a top view. Figure 4 The radiation pattern is that the wireless transceiver 100 is placed at the center of the circle, and the connector 118 of the wireless transceiver 100 is facing the -90 degree direction, and the user is close to the -180 degree direction (downward).

[0042] See also Figure 4 , if the wireless transceiver 100 only has Figure 1 The antenna 120 has a zero point at -180 degrees, which results in poor signal reception and transmission. Figure 1 The radiation pattern of the wireless transceiver 100 with the antenna 120 and the current canceling element 130 can have a good performance in the direction of -180 degrees, and can be improved by about 15dB in the direction close to the user.

[0043] The wireless transceiver of other embodiments is introduced below. The same or similar elements as those of the previous embodiment are represented by the same or similar symbols and will not be described in detail. Only the main differences are described.

[0044] Figure 5 is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present application. Figure 6 yes Figure 5 See Figure 5 and Figure 6 The wireless transceiver 100a of this embodiment and Figure 1 The main difference between the wireless transceiver 100 and the wireless transceiver 100 is that the shapes of the antenna 120a and the current canceling element 130a are different.

[0045] Specifically, in this embodiment, the antenna 120a includes a first section 141, a second section 142 and a third section 143 connected to form a U-shape, wherein at least a portion of the first section 141 is flush with the first surface 112, the second section 142 faces the side surface 116, and at least a portion of the third section 143 faces the second surface 114.

[0046] The current compensation element 130 a includes a fourth segment 144 , a fifth segment 145 and a sixth segment 146 connected to each other. The fourth segment 144 is at least partially flush with the first surface 112 , the fifth segment 145 faces the side surface 116 , and the sixth segment 146 is at least partially facing the second surface 114 .

[0047] Since the first section 141 of the antenna 120a and the fourth section 144 of the current compensation element 130a are flat on the first surface 112, this design allows the antenna 120a and the current compensation element 130a to be more stably arranged on the circuit board 110, and can also reduce the overall height and effectively reduce the size.

[0048] Of course, the antenna 120a and the current compensation element 130a may have different shapes, and their positions may be interchanged or disposed on other sides, and are not limited to the figure.

[0049] Figure 7 Yes only Figure 5 Antenna and Figure 5 The radiation pattern of the antenna and the current cancellation element. Similarly, Figure 7 The figure shows the radiation pattern when the wireless transceiver 100a is inserted into the right port of the notebook computer through the connector 118 and placed at the center of the circle from a top view. In other words, Figure 7 The radiation pattern is that the wireless transceiver 100a is placed at the center of the circle, and the connector 118 of the wireless transceiver 100a is facing the -90 degree direction, and the user is close to the -180 degree direction (downward).

[0050] See also Figure 7 , if the wireless transceiver only has Figure 5 The antenna 120a with a -180 degree angle will have a zero point in the direction of -180 degrees, resulting in poor signal reception. Figure 5 The radiation pattern of the wireless transceiver 100a with the antenna 120a and the current canceling element 130a can have a good performance in the direction of -180 degrees.

[0051] Figure 8is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present invention. Fig. 9 yes Figure 8 See Figure 8 and Fig. 9 The wireless transceiver 100b of this embodiment and Figure 5 The main difference of the wireless transceiver 100a is that the positions of the antenna 120b and the current cancelling element 130b and the shape of the current cancelling element 130b are different.

[0052] In this embodiment, the antenna 120b is closer to the connector 118 than the current canceling element 130b. Figure 5 The antenna 120a is U-shaped. The current canceling element 130b includes a fourth section 144, a fifth section 145 and a sixth section 146 connected to each other. At least a portion of the fourth section 144 is flat against the first surface 112, the fifth section 145 is located beside the side surface 116, and the sixth section 146 passes through the U-shape. Such a design can save space, and the current canceling element 130b can use the space occupied by the antenna 120b. Of course, the positions and shapes of the antenna 120b and the current canceling element 130b can also be interchanged.

[0053] Fig.10 is a three-dimensional schematic diagram of a wireless transceiver according to another embodiment of the present invention. Fig.11 yes Fig.10 See Fig.10 and Fig.11 The wireless transceiver 100c of this embodiment and Figure 5 The main differences of the wireless transceiver 100a are the shape of the antenna 120c and the widths of the antenna 120c and the current canceling element 130c.

[0054] In this embodiment, the antenna 120c includes a meandering section 150 disposed on the first surface 112. The antenna 120c having the meandering section 150 includes a section 152 extending outside the circuit board 110. In one embodiment, the section 152 of the antenna 120c outside the first surface 112 may also extend to the second surface 114. Such a design allows the antenna 120c to utilize more space of the circuit board 110 itself for configuration.

[0055] Of course, the positions and shapes of the antenna 120c and the current canceling element 130c may also be interchanged.

[0056] In summary, the antenna of the wireless transceiver of the present invention is connected to the first surface of the circuit board through the feed end. The wireless transceiver also includes a current compensation element, which is connected to the first surface of the circuit board through the ground end, and the current compensation element and the antenna are arranged on the same side of the circuit board. The antenna resonates out of the frequency band, the length of the antenna is 1 / 4 times the wavelength of the frequency band, and the length of the current compensation element is 1 / 4 times the wavelength of the frequency band. Such a design can make the current in a certain direction (for example, the current parallel to the long side of the circuit board) generated by the antenna on the circuit board be offset by the current compensation element, so that the current in another direction (for example, the current perpendicular to the long side of the circuit board) is left on the circuit board, thereby generating different polarization current distributions (for example, orthogonal polarization current distributions), thereby exciting different antenna field patterns (for example, orthogonal antenna field patterns), and can improve the probability that the dead angle of the antenna radiation field pattern occurs in the direction of the user, thereby improving the transceiver effect.

Claims

1. A wireless transceiver, characterized in that: include: A circuit board including a first side; An antenna, comprising a feeding end, wherein the antenna is connected to the first surface of the circuit board through the feeding end; A current cancelling element, comprising a ground terminal, wherein the current cancelling element is connected to the first surface of the circuit board through the ground terminal, and the current cancelling element and the antenna are arranged on the same side of the circuit board; The antenna resonates in a frequency band, the length of the antenna is 1 / 4 times the wavelength of the frequency band, and the length of the current compensation element is 1 / 4 times the wavelength of the frequency band.

2. The wireless transceiver according to claim 1, characterized in that: The distance between the antenna and the current compensation element is between 0.5 mm and 1 / 2 times the wavelength of the frequency band.

3. The wireless transceiver according to claim 1, characterized in that: A difference between a width of the antenna and a width of the current canceling element is less than or equal to 10%.

4. The wireless transceiver according to claim 1, characterized in that: Each of the width of the antenna and the width of the current cancellation element is between 0.2 mm and 3 mm.

5. The wireless transceiver according to claim 1, characterized in that: The circuit board includes a second surface relative to the first surface and a side surface located between the first surface and the second surface. The antenna and one of the current compensation element include a first section, a second section and a third section that are connected, and are U-shaped. The first section is at least partially flat against the first surface, the second section faces the side surface, and the third section is at least partially facing the second surface.

6. The wireless transceiver according to claim 5, characterized in that: The antenna and the other of the current-cancelling elements include a fourth segment, a fifth segment, and a sixth segment that are connected, wherein at least a portion of the fourth segment is flat against the first surface, the fifth segment faces the side surface, and at least a portion of the sixth segment faces the second surface.

7. The wireless transceiver according to claim 5, characterized in that: The antenna and the other of the current canceling elements include a fourth segment, a fifth segment and a sixth segment connected to each other, the fourth segment is at least partially flat against the first surface, the fifth segment is located beside the side surface, and the sixth segment passes through the U-shape.

8. The wireless transceiver according to claim 5, characterized in that: The other of the antenna and the current canceling element includes a meandering section disposed on the first surface.

9. The wireless transceiver according to claim 8, characterized in that: The antenna or the current cancellation element of the wireless transceiver having the meandering section includes a section extending beyond the second surface or the circuit board.

10. The wireless transceiver according to claim 1, characterized in that: The circuit board includes a second surface relative to the first surface and a side surface located between the first surface and the second surface. At least one of the antenna and the current compensation element includes a first segment, a second segment, a third segment and a fourth segment that are connected. The first segment stands on the first surface, the second segment is at least partially facing the first surface, the third segment is facing the side surface, and the fourth segment is at least partially facing the second surface.

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