TW202107769A - Antenna structure and wireless communication device using the same - Google Patents

Abstract

The present invention relates to an antenna structure and a wireless communication device using the same. The wireless communication device includes a first chip and a second chip. The antenna structure includes a substrate, a first antenna and a second antenna positioned on the substrate, and a switching unit. When the wireless communication device is working at a first operating state, the first antenna is connected to the first chip and the second antenna is switched to be grounded via the switching unit. When the wireless communication device is working at a second operating state, the first antenna disconnects from the first chip and the second antenna is switched to be connected to the second chip via the switching unit.

Description

Antenna structure and wireless communication device with the antenna structure

The invention relates to an antenna structure and a wireless communication device with the antenna structure.

With the advancement of wireless communication technology, electronic devices such as mobile phones and personal digital assistants are constantly developing towards the trend of diversified functions, thinner and lighter, and faster and more efficient data transmission. However, its relatively small space for accommodating antennas is getting smaller and smaller, and with the continuous development of wireless communication technology, the demand for antenna bandwidth is increasing. Therefore, how to design an antenna with a wider bandwidth in a limited space (for example, a 5G antenna that can support a faster transmission rate) is still an important issue facing antenna design.

In view of this, it is necessary to provide an antenna structure and a wireless communication device having the antenna structure.

An antenna structure applied to a wireless communication device. The wireless communication device includes a first chip and a second chip. The antenna structure includes a substrate, a first antenna and a second antenna disposed on the substrate, and a switch Unit, when the wireless communication device is in the first working state, the first antenna is connected to the first chip, and the second antenna is switched to ground by the switching unit, and when the wireless communication device When in the second working state, the first antenna is disconnected from the first chip, and the second antenna is switched to be connected to the second chip through the switching unit.

A wireless communication device includes a first chip, a second chip, and the above-mentioned antenna structure connected with the first chip and the second chip.

The antenna structure according to the preferred embodiment of the present invention integrates the first antenna and the second antenna through a switching unit, which increases the overall working bandwidth of the antenna structure without additional antenna design space. The wireless communication device has both NFC function and 5G communication function.

Please refer to FIG. 1, a preferred embodiment of the present invention provides an antenna structure 100 that can be used in a wireless communication device 200 to transmit and receive radio waves to transmit and exchange wireless signals. The wireless communication device 200 may be a communication device such as a mobile phone, a CPE (Customer Premise Equipment, customer terminal equipment). In this embodiment, the wireless communication device 200 is a mobile phone as an example for description.

In this embodiment, the wireless communication device 200 further includes a first chip 201 and a second chip 202. In this preferred embodiment, the first chip 201 is a 5G chip, which is used to support the wireless communication device 200 to work in the first working state. The second chip 202 is an NFC chip for supporting the wireless communication device 200 to work in a second working state.

The antenna structure 100 includes a substrate 10, a first antenna 20 and a second antenna 30 disposed on the substrate 10, and a switching unit 40. When the wireless communication device 200 is in the first working state, the first antenna 20 is connected to the first chip 201, and the second antenna 30 is switched to ground via the switching unit 40 (as shown in FIG. 2 Shown). When the wireless communication device 200 is in the second working state, the first antenna 20 is disconnected from the first chip 201, and the second antenna 30 is switched to and from the first chip 201 through the switching unit 40. The second chip 202 is connected (as shown in FIG. 3).

In this preferred embodiment, the first antenna 20 is a 5G millimeter wave antenna, and the second antenna 30 is an NFC antenna. Correspondingly, the first working state is a 5G antenna working state, for example, using 5G to surf the Internet; the second working state is an NFC antenna working state, for example, performing NFC sensing or NFC payment.

Please refer to FIGS. 2 to 4 together. In this preferred embodiment, the first antenna 20 includes an array antenna 21, and each array antenna 21 includes a radiator 211 disposed on the substrate 10 and The feed end 212 and the ground end 213 connected to the radiator 211 are connected to the first chip 201 via the feed end 212, and the ground end 213 is connected to the second antenna 30.

In this preferred embodiment, each array antenna 21 includes four substantially square radiators 211, and the four radiators 211 are arranged on the substrate 10 at even intervals. It can be understood that the number and location of the radiator 211 can be adjusted according to actual design requirements. In this preferred embodiment, each radiator 211 is a MIMO antenna.

In this preferred embodiment, the size of each array antenna 21 is approximately 3.5 mm×2.5 mm×0.2 mm.

In this preferred embodiment, the second antenna 30 is a loop antenna, and includes a first end 31, a second end 32, and a loop 33 between the first end 31 and the second end 32. The second antenna 30 extends through the first end 31 along the loop 33 to the second end 32, and the first end 31 and the second end 32 are connected to the second chip 202. The first end 31 is located outside the loop 33, and the second end 32 is located inside the loop 33.

In this preferred embodiment, the loop 33 is approximately rectangular, and each loop antenna 30 includes four loops 33.

In this preferred embodiment, the switching unit 40 includes a connecting terminal 41, a first switching terminal 42, and a second switching terminal 43. The connecting terminal 41 is connected to the second terminal 32, and the first switching terminal 42 is grounded, and the second switching terminal 43 is connected to the second chip 202.

It can be understood that the connecting end 41 may also be connected to the first end 31, and the second end 32 is directly connected to the second chip 202. The first switching terminal 42 is connected to the second chip 202, and the second switching terminal 43 is grounded.

In the preferred embodiment, the antenna structure 100 further includes a matching unit 50. The matching unit 50 includes a first capacitor C1, a second capacitor C2, and a third capacitor C3. The first capacitor C1 is connected to the Between the second terminal 32 and the second chip 202, the second capacitor C2 is connected between the first terminal 31 and the second chip 202, and the third capacitor C3 is connected to the second chip 202. Between one end 31 and the second end 32.

It can be understood that the matching unit 50 may further include electronic components such as inductors and resistors for impedance matching of the second antenna 30.

The antenna structure 100 according to the preferred embodiment of the present invention integrates the first antenna 20 and the second antenna 30 through the switching unit 40, which increases the entire working bandwidth of the antenna structure 100 without additional The antenna design space can enable the wireless communication device 200 to have both NFC function and 5G communication function.

In summary, this creation meets the requirements of an invention patent, and Yan filed a patent application in accordance with the law. However, the above are only the preferred embodiments of this creation, and the scope of this creation is not limited to the above embodiments. For those who are familiar with the techniques of this case, equivalent modifications or changes made in accordance with the spirit of this creation are all Should be covered in the scope of the following patent applications.

100: Antenna structure 200: wireless communication device 201: The first chip 202: second chip 10: substrate 20: The first antenna 21: Array antenna 211: Radiator 212: feed end 213: Ground terminal 30: second antenna 31: first end 32: second end 33: Loop 40: switching unit 41: connection end 42: The first switching end 43: second switching end 50: matching unit C1: The first capacitor C2: second capacitor C3: third capacitor

FIG. 1 is a schematic diagram of the antenna structure of the preferred embodiment of the present invention applied to a wireless communication device. FIG. 2 is a schematic diagram of the antenna structure shown in FIG. 1 when the wireless communication device is in a first working state. FIG. 3 is a schematic diagram of the antenna structure shown in FIG. 1 when the wireless communication device is in a second working state. Fig. 4 is a schematic diagram of the array antenna of the first antenna shown in Fig. 1.

100: Antenna structure

200: wireless communication device

201: The first chip

202: second chip

10: substrate

20: The first antenna

21: Array antenna

30: second antenna

31: first end

32: second end

33: Loop

40: switching unit

41: connection end

42: The first switching end

43: second switching end

50: matching unit

C1: The first capacitor

C2: second capacitor

C3: third capacitor

Claims (10)

An antenna structure applied to a wireless communication device. The wireless communication device includes a first chip and a second chip. The improvement lies in that the antenna structure includes a substrate, a first antenna disposed on the substrate, and a second antenna. When the wireless communication device is in the first working state, the first antenna is connected to the first chip, and the second antenna is switched to ground via the switching unit. When the wireless communication device is in the second working state, the first antenna is disconnected from the first chip, and the second antenna is switched to be connected to the second chip through the switching unit. The antenna structure according to claim 1, wherein the first antenna includes an array antenna, and each array antenna includes a radiator provided on the substrate, a feed end connected to the radiator, and a ground The radiator is connected to the first chip via the feeding terminal, and the ground terminal is connected to the second antenna. According to the antenna structure described in item 2 of the scope of patent application, each array antenna includes four substantially square radiators, and the four radiators are arranged on the substrate at even intervals. As for the antenna structure described in item 2 of the scope of patent application, the size of each array antenna is approximately 3.5mm×2.5mm×0.2mm. The antenna structure according to the first item of the scope of patent application, wherein the second antenna is a loop antenna, including a first end, a second end, and a loop between the first end and the second end, The second antenna extends along the loop through the first end to the second end, and the first end and the second end are connected to the second chip. According to the antenna structure described in item 5 of the scope of patent application, the loops are approximately rectangular, and each loop antenna includes four loops. The antenna structure according to the fifth item of the scope of patent application, wherein the switching unit includes a connecting terminal, a first switching terminal, and a second switching terminal, and the connecting terminal is connected to the first terminal or the second terminal, The first switching terminal is connected to ground, and the second switching terminal is connected to the second chip. The antenna structure according to item 7 of the scope of patent application, wherein the antenna structure further includes a matching unit, and the matching unit includes a first capacitor, a second capacitor, and a third capacitor, and the first capacitor is connected to the Between the second terminal and the second chip, the second capacitor is connected between the first terminal and the second chip, and the third capacitor is connected between the first terminal and the second chip. Between ends. According to the antenna structure described in item 1 of the scope of patent application, the first antenna is a 5G millimeter wave antenna, the second antenna is an NFC antenna, the first working state is a 5G antenna working state, and the The second working state is the working state of the NFC antenna. A wireless communication device includes a first chip, a second chip, and an antenna structure connected to the first chip and the second chip. The improvement is that the antenna structure is described in any one of the patent applications 1-9 The antenna structure.

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