CN119253254A

CN119253254A - Antenna components and electronic equipment

Info

Publication number: CN119253254A
Application number: CN202411666974.3A
Authority: CN
Inventors: 张涛
Original assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Current assignee: Realme Mobile Telecommunications Shenzhen Co Ltd
Priority date: 2024-11-19
Filing date: 2024-11-19
Publication date: 2025-01-03

Abstract

The present application provides an antenna assembly, including a radiating branch, a first and a second feed source, and a first and a second matching filter unit. The radiating branch includes a feed point, the first matching filter unit is connected between the first feed source and the feed point, and the second matching filter unit is connected between the second feed source and the feed point. The first feed source excites the radiating branch to support a first group of frequency bands through the first matching filter unit, and the second feed source excites the radiating branch to support a second group of frequency bands through the second matching filter unit, and the first group of frequency bands and the second group of frequency bands are different. The first matching filter unit is used to achieve matching adjustment of the first group of frequency bands and filtering of the second group of frequency bands, and the second matching filter unit is used to achieve matching adjustment of the second group of frequency bands and filtering of the first group of frequency bands. The present application also provides an electronic device. The present application can effectively reduce the size of the radiating branch and can ensure or even improve the radiation performance.

Description

Antenna assembly and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to an antenna assembly and an electronic device having the same.

Background

Currently, with the popularization of 5G communication technology, the communication experience of people is better. However, with the popularization of the full screen, the curved screen, etc., the space left for the antenna is smaller and smaller, and the antenna frequency band and the antenna are required to meet various communication demands at present. Therefore, how to set an antenna in a limited space to meet the current communication requirement becomes a problem to be solved.

Disclosure of Invention

The application provides an antenna assembly and electronic equipment for solving the problems.

In a first aspect, an antenna assembly is provided that includes a radiating branch, a first feed, a first matched filter unit, a second feed, and a second matched filter unit. The radiation branch comprises a feed point, the first matched filtering unit is connected between the first feed source and the feed point, and the second matched filtering unit is connected between the second feed source and the feed point. The first feed source excites the radiation branch to support receiving and transmitting of electromagnetic wave signals of a first group of frequency bands through the first matched filtering unit, the second feed source excites the radiation branch to support receiving and transmitting of electromagnetic wave signals of a second group of frequency bands through the second matched filtering unit, the first group of frequency bands and the second group of frequency bands comprise at least one frequency band, the first group of frequency bands and the second group of frequency bands comprise different frequency bands, the first matched filtering unit is used for achieving matched adjustment of the first group of frequency bands and filtering of the second group of frequency bands, and the second matched filtering unit is used for achieving matched adjustment of the second group of frequency bands and filtering of the first group of frequency bands.

In a second aspect, there is also provided an electronic device comprising an antenna assembly. The antenna assembly comprises a radiation branch, a first feed source, a first matched filtering unit, a second feed source and a second matched filtering unit. The radiation branch comprises a feed point, the first matched filtering unit is connected between the first feed source and the feed point, and the second matched filtering unit is connected between the second feed source and the feed point. The first feed source excites the radiation branch to support receiving and transmitting of electromagnetic wave signals of a first group of frequency bands through the first matched filtering unit, the second feed source excites the radiation branch to support receiving and transmitting of electromagnetic wave signals of a second group of frequency bands through the second matched filtering unit, the first group of frequency bands and the second group of frequency bands comprise at least one frequency band, the first group of frequency bands and the second group of frequency bands comprise different frequency bands, the first matched filtering unit is used for achieving matched adjustment of the first group of frequency bands and filtering of the second group of frequency bands, and the second matched filtering unit is used for achieving matched adjustment of the second group of frequency bands and filtering of the first group of frequency bands.

According to the antenna assembly and the electronic device, the first matched filtering unit is used for carrying out matched adjustment on the first group of frequency bands and filtering the second group of frequency bands, and the second matched filtering unit is used for carrying out matched adjustment on the second group of frequency bands and filtering the first group of frequency bands, so that under the condition of sharing a feed point and a radiation branch, a plurality of different frequency bands can be supported, interference among the plurality of frequency bands can be avoided, more frequency bands can be realized by using fewer radiation branches, and the requirement of multiple antenna frequency bands can be met in a limited space.

Drawings

In order to more clearly describe the embodiments of the present application or the technical solutions in the background art, the following description will describe the drawings that are required to be used in the embodiments of the present application or the background art.

Fig. 1 is a schematic structural diagram of an antenna assembly according to an embodiment of the application.

Fig. 2 is a further schematic structural diagram of an antenna assembly according to some embodiments of the present application.

Fig. 3 is a schematic diagram illustrating a further specific structure of an antenna assembly according to some embodiments of the present application.

Fig. 4 is a block diagram of an electronic device in some embodiments of the application.

Fig. 5 is a schematic plan view of an electronic device according to some embodiments of the application.

Fig. 6 is a schematic diagram of return loss obtained by performing a simulation test when the electronic device operates in the first set of frequency bands.

Fig. 7 is a schematic diagram of return loss obtained by performing a simulation test when the electronic device operates in the second set of frequency bands.

Fig. 8 is a schematic diagram of isolation obtained by performing a simulation test when the electronic device is simultaneously operating in the first set of frequency bands and the second set of frequency bands.

Fig. 9 is a schematic diagram of overall system efficiency obtained by performing a simulation test when the electronic device operates in the first set of frequency bands and the second set of frequency bands.

Fig. 10 is a schematic diagram illustrating an upper hemisphere duty cycle of an electronic device operating in a second set of frequency bands according to some embodiments of the present application.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without any inventive effort, are intended to be within the scope of the invention.

In the description of the embodiments of the present application, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "thickness", "width", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not imply or indicate that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. The term "coupled" in this disclosure includes physically structural, electrical, direct or indirect connections, as may be determined in accordance with the connection desired. In the description of the embodiments of the present application, the terms "first", "second", and the like are not particularly limited, but rather, in order to distinguish between the same-named objects, the terms "first", "second", and the like refer to the same-named objects in the case of the description.

Fig. 1 is a schematic structural diagram of an antenna assembly 1 according to an embodiment of the application. As shown in fig. 1, the antenna assembly 1 includes a radiating branch 11, a first feed 12, a first matched filter unit 13, a second feed 14, and a second matched filter unit 15. The radiation branch 11 comprises a feed point F1, the first matched filtering unit 13 is connected between the first feed source 12 and the feed point F1, and the second matched filtering unit 15 is connected between the second feed source 14 and the feed point F1. The first feed source 12 excites the radiation branch 11 to support the receiving and transmitting of electromagnetic wave signals of a first group of frequency bands through the first matched filtering unit 13, the second feed source 14 excites the radiation branch 11 to support the receiving and transmitting of electromagnetic wave signals of a second group of frequency bands through the second matched filtering unit 15, the first group of frequency bands and the second group of frequency bands comprise at least one frequency band, and the frequency bands included in the first group of frequency bands and the second group of frequency bands are different. The first matched filtering unit 13 is configured to implement matched adjustment of the first set of frequency bands and filtering of the second set of frequency bands, and the second matched filtering unit 15 is configured to implement matched adjustment of the second set of frequency bands and filtering of the first set of frequency bands.

Therefore, in the antenna assembly 1 of the present application, the first matched filtering unit 13 is used for matching adjustment of the first set of frequency bands and filtering of the second set of frequency bands, and the second matched filtering unit 15 is used for matching adjustment of the second set of frequency bands and filtering of the first set of frequency bands, so that under the condition of sharing the feed point and the radiation branches 11, a plurality of different frequency bands can be supported, interference among the plurality of frequency bands can be avoided, and compared with the prior art that different radiation branches are needed to realize different frequency bands, the present application can realize more frequency bands with fewer radiation branches, and can meet the requirement of multiple antenna frequency bands in a limited space.

In the present application, the implementation of the first matched filtering unit 13 to perform the matching adjustment of the first set of frequency bands means that the radiation branch 11 supports resonance in the first set of frequency bands under the matching adjustment of the first matched filtering unit 13, and the implementation of the first matched filtering unit 13 to perform the filtering of the second set of frequency bands means that the first matched filtering unit 13 filters electromagnetic wave signals of the second set of frequency bands and filters electromagnetic wave signals of the second set of frequency bands. The second matched filtering unit 15 implements the matching adjustment of the second set of frequency bands, which means that the radiation branch 11 supports resonance in the second set of frequency bands under the matching adjustment of the second matched filtering unit 15, and the second matched filtering unit 15 implements the filtering of the first set of frequency bands, which means that the second matched filtering unit 15 filters electromagnetic wave signals of the first set of frequency bands, and filters electromagnetic wave signals of the first set of frequency bands.

Therefore, in the application, as the radiation branch 11 supports resonance in the first group of frequency bands under the matching adjustment of the first matched filtering unit 13, the first feed source 12 can excite the radiation branch 11 to support the receiving and transmitting of electromagnetic wave signals in the first group of frequency bands through the first matched filtering unit 13. Since the radiation branch 11 supports resonance in the second set of frequency bands under the matching adjustment of the second matched filtering unit 15, the second feed source 14 can also excite the radiation branch 11 to support the transmission and reception of electromagnetic wave signals in the second set of frequency bands through the second matched filtering unit 15. The first matched filtering unit 13 filters the electromagnetic wave signals of the second group of frequency bands, so that the electromagnetic wave signals of the second group of frequency bands can be prevented from interfering the electromagnetic wave signals of the first group of frequency bands, and the second matched filtering unit 15 filters the electromagnetic wave signals of the first group of frequency bands, so that the electromagnetic wave signals of the first group of frequency bands can be prevented from interfering the electromagnetic wave signals of the second group of frequency bands. Therefore, the radiation branch 11 and the feeding point F1 can be shared to support a plurality of frequency bands, and interference between the plurality of frequency bands can be avoided.

In some embodiments, the first set of frequency bands includes frequency bands above 3GHz and the second set of frequency bands includes frequency bands below 3 GHz.

That is, in some embodiments, the first set of frequency bands includes high frequency bands above 3GHz and the second set of frequency bands includes low frequency bands below 3GHz, intermediate frequency bands, and so on. Therefore, the application can realize the combination of high frequency and low frequency and/or high frequency and intermediate frequency by sharing the same radiation branch 11 and the same feed point F1.

In some embodiments, a frequency band above 3GHz means that the lower limit of the frequency range corresponding to the frequency band is greater than or equal to 3GHz, and a frequency band below 3GHz means that the upper limit of the frequency range corresponding to the frequency band is less than 3GHz. In some embodiments, a frequency band above 3GHz may also refer to a resonant frequency or a center frequency corresponding to the frequency band being greater than or equal to 3GHz, and a frequency band below 3GHz may also refer to an upper limit of the resonant frequency or the center frequency corresponding to the frequency band being less than 3GHz.

In some embodiments, the first set of frequency bands includes a first frequency band and a second frequency band, the second set of frequency bands includes a third frequency band.

That is, in some embodiments, the first set of frequency bands may include two frequency bands, a first frequency band and a second frequency band, and the second set of frequency bands includes one frequency band, a third frequency band. Obviously, in other embodiments, the first set of frequency bands may also include a plurality of frequency bands such as one frequency band or three frequency bands, and the second set of frequency bands may also include two or more frequency bands.

Wherein the first frequency band and the second frequency band are different.

In some embodiments, the two or more frequency bands are different when the first set of frequency bands includes two or more frequency bands, and the two or more frequency bands are different when the second set of frequency bands includes two or more frequency bands. Thus, since the first set of frequency bands and the second set of frequency bands include different frequency bands and the frequency bands in each set of frequency bands are different, the antenna assembly 1 of the present application can support two or more different frequency bands as a whole.

In the application, the two frequency bands are different, and the situation that the frequency ranges corresponding to the two frequency bands are not completely overlapped or completely not overlapped is included.

In some embodiments, the first frequency band and the second frequency band are an N78 frequency band and a WiFi 5G frequency band, respectively, and the third frequency band is one of a satellite communication frequency band, a WiFi 2.4G frequency band, a low frequency band, and an intermediate frequency band.

That is, in some embodiments, the first frequency band and the second frequency band are the 5G frequency band of the N78 frequency band and the WiFi frequency band of the WiFi 5G frequency band, so that the requirements of the 5G communication and the WiFi communication can be simultaneously satisfied, in addition, the third frequency band included in the second group of frequency bands is one of the satellite communication frequency band, the WiFi 2.4G frequency band and the low frequency band, and further, the communication requirements of the satellite communication, the WiFi communication of other frequency bands and the low frequency band can be further satisfied, so that the requirements of multiple communications can be satisfied.

It is obvious that, in some embodiments, the first frequency band and the second frequency band included in the first set of frequency bands may also be other frequency bands higher than 3GHz, for example, the first frequency band and the second frequency band may also be an N79 frequency band and a WiFi 5G frequency band, or may also be an N78 frequency band and an N79 frequency band, respectively, and so on.

In some embodiments, the satellite communications bands include a satellite positioning band and a satellite telephony band. For example, in some embodiments, the satellite communications band may include one of a GPS L1 band, a GPS L5 band, a Beidou satellite communications band.

That is, in some embodiments, the satellite communications bands may include satellite positioning bands, satellite talk bands, and the like, and may include satellite communications bands of different standards, such as GPS bands, beidou satellite communications bands, and the like.

In some embodiments, the low frequency band may include a B5 band, a B8 band, a B20 band, a B28 band, etc., and the intermediate frequency band may include a B3 band, a B1 band, a B41 band, etc.

In some embodiments, the first matched filter unit 13 and the second matched filter unit 15 perform matching adjustment to perform impedance matching adjustment, so that the radiation branch 11 can support resonance in the first set of frequency bands and the second set of frequency bands under the impedance matching adjustment of the first matched filter unit 13 and the second matched filter unit 15, respectively. When the first set of frequency bands includes a first frequency band and a second frequency band, the radiating branch 11 may support resonance in the first frequency band and the second frequency band simultaneously under the matching adjustment of the first matched filtering unit 13, for example, the first matched filtering unit 13 may adjust a frequency point corresponding to the optimal impedance matching to be located between the first frequency band and the second frequency band, so that the impedance matching of the first frequency band and the second frequency band is better, and the radiating branch 11 may support resonance in the first frequency band and the second frequency band simultaneously under the matching adjustment of the first matched filtering unit 13, and the radiation efficiency in the first frequency band and the second frequency band is higher. In some embodiments, when the second set of frequency bands also includes two or more frequency bands, i.e., includes a third frequency band and other frequency bands, the radiating branch 11 may support resonance in the third frequency band and the other frequency bands at the same time under the matched adjustment of the second matched filtering unit 15.

Referring to fig. 2, a schematic diagram of an antenna assembly 1 according to some embodiments of the present application is shown. In which a further structure of the first matched filter unit 13 and the second matched filter unit 15 is schematically shown in fig. 2.

As shown in fig. 2, in some embodiments, the first matched filtering unit 13 includes a first matched circuit 131 and a first filter circuit 132, where the first matched circuit 131 is used to implement the matched adjustment of the first set of frequency bands, the first filter circuit 132 is used to filter out electromagnetic wave signals of the second set of frequency bands, and the second matched filtering unit 15 includes a second matched circuit 151 and a second filter circuit 152, where the second matched circuit 151 is used to implement the matched adjustment of the second set of frequency bands, and the second filter circuit 152 is used to filter out electromagnetic wave signals of the first set of frequency bands.

That is, in some embodiments, the first matched filtering unit 13 specifically includes a first matched circuit 131 and a first filter circuit 132, where the first matched circuit 131 and the first filter circuit 132 are respectively configured to implement the matched adjustment of the first set of frequency bands and the filtering of the second set of frequency bands, and the second matched filtering unit 15 includes a second matched circuit 151 and a second filter circuit 152, where the second matched circuit 151 and the second filter circuit 152 are respectively configured to implement the matched adjustment of the second set of frequency bands and the filtering of the first set of frequency bands.

In some embodiments, the first filter circuit 132 is a high pass filter circuit and the second filter circuit 152 is a medium low pass filter circuit. That is, in some embodiments, the first filter circuit 132 is a high-pass filter for filtering out electromagnetic wave signals of a middle-low frequency band and allowing only electromagnetic wave signals of a high frequency band to pass through, and the second filter circuit 152 is a middle-low pass filter circuit for filtering out electromagnetic wave signals of a high frequency band and allowing only electromagnetic wave signals of a middle-low frequency band to pass through.

Thus, as described above, since the first set of frequency bands includes a high frequency band higher than 3GHz and the second set of frequency bands includes a medium-low frequency band lower than 3GHz, when the first filter circuit 132 is a high-pass filter circuit, the first filter circuit allows electromagnetic wave signals of the first set of frequency bands including the high frequency band to pass, and prevents electromagnetic wave signals of the second set of frequency bands including the medium-low frequency band from passing, so that the first feed source 12 can normally excite the radiating branch 11 through the first matched filter unit 13 to support the transmission and reception of the electromagnetic wave signals of the first set of frequency bands, and the electromagnetic wave signals of the second set of frequency bands can be prevented from interfering with the electromagnetic wave signals of the first set of frequency bands. Similarly, the second filter circuit 152 is a low-and-medium-pass filter circuit, and allows the electromagnetic wave signals of the second group of frequency bands including the low-and-medium frequency band to pass through, and prevents the electromagnetic wave signals of the first group of frequency bands including the high-frequency band from passing through, so that the second feed source 14 can normally excite the radiation branch 11 to support the receiving and transmitting of the electromagnetic wave signals of the second group of frequency bands through the second matched filter unit 15, and the electromagnetic wave signals of the first group of frequency bands can be prevented from interfering the electromagnetic wave signals of the second group of frequency bands. Therefore, the radiation branch 11 and the feeding point F1 can be shared to support a plurality of frequency bands, and interference between the plurality of frequency bands can be avoided.

In some embodiments, as shown in fig. 2, the first matching circuit 131 and the first filtering circuit 132 are connected in series between the first feed 12 and the feed point F1, and the second matching circuit 151 and the second filtering circuit 152 are connected in series between the second feed 14 and the feed point F1.

That is, in some embodiments, the first matching circuit 131 and the first filtering circuit 132 are connected in series between the first feed 12 and the feed point F1 to respectively implement matching adjustment of the first set of frequency bands and filtering of the second set of frequency bands, and the second matching circuit 151 and the second filtering circuit 152 are connected in series between the second feed 14 and the feed point F1 to respectively implement matching adjustment of the second set of frequency bands and filtering of the first set of frequency bands.

In fig. 2, the first matching circuit 131 and the first filter circuit 132 are sequentially connected in series between the first feed source 12 and the feed point F1, and the second matching circuit 151 and the second filter circuit 152 are sequentially connected in series between the second feed source 14 and the feed point F1. Obviously, in some embodiments, the first filter circuit 132 and the first matching circuit 131 may be sequentially connected in series between the first feed source 12 and the feeding point F1, and the second filter circuit 152 and the second matching circuit 151 may be sequentially connected in series between the second feed source 14 and the feeding point F1.

In some embodiments, as shown in fig. 1 and 2, the first feed 12 includes an output 121, the second feed 14 includes an output 141, and in the present application, "a" is connected between the first feed 12 and/or "B", which may mean that "a" is connected between the output 121 and/or "B" of the first feed 12, and "a" is connected between the second feed 14 and/or "B", which may mean that "a" is connected between the output 141 and/or "B" of the second feed 14.

In some embodiments, the first feed 12 is configured to output a first set of frequency band feed signals, that is, the first feed 12 outputs a first set of frequency band feed signals through an output terminal 121, where the first set of frequency band feed signals are applied to the radiating branch 11 through the first matched filtering unit 13 and the feed point F1, so as to excite the radiating branch 11 to support transceiving of electromagnetic wave signals of the first set of frequency bands. In some embodiments, the second feed 14 is configured to output a second set of frequency band feed signals, that is, the second feed 14 outputs a second set of frequency band feed signals through the output terminal 141, where the second set of frequency band feed signals are applied to the radiating branch 11 through the second matched filtering unit 15 and the feed point F1, so as to excite the radiating branch 11 to support the transceiving of the second set of frequency band electromagnetic wave signals.

In some embodiments, when the first set of frequency bands includes a first frequency band and a second frequency band, the feed signals of the first set of frequency bands output by the first feed 12 include a plurality of feed signals of the first frequency band and the feed signals of the second frequency band. At this time, the first feed 12 may be a feed signal source obtained by mixing the multiple feed signals by a radio frequency front end circuit (not shown) through a combiner (not shown). Thereby, the radiation stub 11 can be excited to operate in the corresponding first frequency band and second frequency band. In some embodiments, when the second set of frequency bands also includes a plurality of frequency bands, for example, when the second set of frequency bands includes the third frequency band and other frequency bands, the second feed 14 may also be a feed signal source obtained by mixing, by a combiner (not shown), the plurality of feed signals by using a radio frequency front-end circuit (not shown), so that the radiating branch 11 may be excited to operate in the corresponding third frequency band and other frequency bands.

In some embodiments, the first matching circuit 131 and the second matching circuit 151 may include a plurality of capacitors and/or inductors to implement the corresponding matching adjustment, and the first filtering circuit 132 and the second filtering circuit 152 may include at least capacitors to implement the corresponding filtering function.

Referring to fig. 3, a schematic diagram of an antenna assembly 1 according to some embodiments of the present application is shown. In which a further specific structure of the first matched filter unit 13 and the second matched filter unit 15 is schematically shown in fig. 3.

As shown in fig. 3, in some embodiments, the first matching circuit 131 includes a first inductor L1, a first capacitor C1, and a second capacitor C2, the first filtering circuit 132 includes a second inductor L2, and a third capacitor C3, the first inductor L1 and the first capacitor C1 are connected in series between the first feed 12 and the first filtering circuit 132, the second capacitor C2 is connected between the first feed 12 and the ground GND, the third capacitor C3 is connected between the first capacitor C1 and the feed point F1, the second inductor L2 is connected between a first connection node N1 and the ground GND, and the first connection node N1 is a connection node between the third capacitor C3 and the first capacitor C1. As shown in fig. 3, the second matching circuit 151 includes a fourth capacitor C4 and a fifth capacitor C5, the second filter circuit 152 includes a third inductor L3, the fourth capacitor C4 is connected between the second feed 14 and the second filter circuit 152, the fifth capacitor C5 is connected between the second feed 14 and the ground GND, and the third inductor L3 is connected between the feed point F1 and the fourth capacitor C4.

Thus, in some examples, by the specific structure of the first matched filtering unit 13 and the second matched filtering unit 15 shown in fig. 3, the first matched filtering unit 13 can implement matched adjustment of a first set of frequency bands and implement filtering of the second set of frequency bands, and the second matched filtering unit 15 can implement matched adjustment of the second set of frequency bands and implement filtering of the first set of frequency bands.

It is apparent that fig. 3 is only an example, and the first matching circuit 131, the second matching circuit 151, the first filtering circuit 132, and the second filtering circuit 152 may also include other suitable circuit structures.

In some embodiments, the third inductance L3 is a large inductance, and an inductance value of the third inductance L3 is greater than an inductance value of the first inductance and the second inductance. Accordingly, since the large inductor has an effect of blocking high frequencies, the second filter circuit 152 includes the third inductor L3, and can effectively filter out electromagnetic wave signals of the first group of frequency bands including the high frequency band.

In some embodiments, the capacitance values of the first capacitor C1 and the second capacitor C2 are both 0.7pF, the inductance value of the first inductor L1 is 1nH, the inductance value of the second inductor L2 is 2nH, the capacitance value of the third capacitor C3 is 1pF, the inductance value of the third capacitor L3 is 22nH, the capacitance value of the fourth capacitor C4 is 1.5pF, and the capacitance value of the fifth capacitor C5 is 3pF.

Obviously, the values of the above-mentioned capacitance and inductance may be obtained according to a simulation experiment, and the values of the above-mentioned capacitance and inductance are just an example, and other values may be obtained according to a simulation experiment, so long as matching and filtering of the corresponding frequency band can be achieved.

Referring back to fig. 1-3, in some embodiments, the radiating stub 11 includes a first end 11a and a second end 11b opposite to each other, the first end 11a is an open end, the second end 11b is grounded, and the feeding point F1 is located between the first end 11a and the second end 11 b.

That is, in some embodiments, the radiating stub 11 generally forms an inverted-F antenna (INVERTED F ANTENNA). Because the inverted-F antenna is in a quarter-wavelength resonant mode, the required size is smaller, the overall size can be effectively reduced, and the occupation of space is reduced.

In some embodiments, the length of the radiating branch 11 may be less than 1/4 of the wavelength corresponding to the second set of frequency bands, for example, the length of the radiating branch 11 may be 20.1mm (millimeters), which may be effectively reduced compared to the 50mm size required for the original frequency bands such as GPS L5. As mentioned above, the third inductor L3 is used to filter out the high frequency band, and in fact the third inductor L3 is effective to increase the electrical length, so that in practice the matching adjustment of the second set of frequency bands can be understood as the matching of the third inductor L3 and the capacitance in the second filter circuit 152, so that the radiating branch 11 can meet the resonance in the second set of frequency bands.

Therefore, the antenna assembly 1 of the present application can realize more frequency bands with fewer radiation branches through the structure, and can meet the requirement of multiple antenna frequency bands in a limited space.

Referring to fig. 4, a block diagram of an electronic device 100 according to some embodiments of the application is shown. As shown in fig. 4, the electronic device 100 may include the antenna assembly 1 according to any of the foregoing embodiments. Therefore, the electronic device 100 is provided with the antenna assembly 1 in any of the foregoing embodiments, the first matched filtering unit 13 performs matched adjustment on the first set of frequency bands and filters the second set of frequency bands, and the second matched filtering unit 15 performs matched adjustment on the second set of frequency bands and filters the first set of frequency bands, so that under the condition of sharing the feed point and the radiation branch 11, a plurality of different frequency bands can be supported, interference between the plurality of frequency bands can be avoided, and compared with the prior art that different frequency bands are realized by using different radiation branches, more frequency bands can be realized by using fewer radiation branches, and the requirement of multiple antenna frequency bands can be met in a limited space.

Fig. 5 is a schematic plan view of an electronic device 100 according to some embodiments of the application. Fig. 5 is a schematic top view of the antenna assembly 1 from the back side of the electronic device 100, i.e. from the side facing away from the display screen. The antenna assembly 1 shown in the previous fig. 1 to 3 may be the antenna assembly 1 from the rear side of the electronic device 100.

As shown in fig. 5, the electronic device 100 further includes a frame B1, and the radiation branch 11 is disposed on the frame B1 of the electronic device 100. That is, in some embodiments, the radiating branches 11 are at the border B1.

In some embodiments, the frame B1 of the electronic device 100 is a metal frame, and the radiation branch 11 may be a metal frame segment formed by opening the slit X0 of the metal frame of the electronic device 100. That is, in some embodiments, when the frame B1 of the electronic device 100 is a metal frame, the radiation branch 11 may be a metal frame segment formed by opening the slit X0 of the frame B1.

In some embodiments, as shown in fig. 5, the radiating branch 11 may also be formed by opening the slit X0 at only the first end 11a to form an open end, the second end 11b of the radiating branch 11 may be connected to other adjacent branches, and the second end 11b is grounded, so as to isolate the radiating branch 11 from the other adjacent branches. Obviously, in some embodiments, the second end 11b of the radiation branch 11 may also have the gap X0 between the adjacent branch, while increasing the isolation between the adjacent other branch.

In other embodiments, the frame B1 of the electronic device 100 is a non-metal frame, and the radiation branch 11 is a metal segment disposed in the frame of the electronic device 100.

That is, in other embodiments, the frame B1 of the electronic device 100 may be a frame with low electrical conductivity, such as plastic, ceramic, or other non-metal frame. The radiation branch 11 is a metal segment disposed in the frame B1 of the electronic device 100. The radiation branches 11 may be embedded in the frame of the electronic device 100, or disposed on an inner side surface of the frame of the electronic device 100.

As shown in fig. 5, the frame B1 includes two long opposite frames B11 and two short opposite frames B12, wherein the radiation branches 11 may be disposed in one of the short frames B12. Fig. 5 illustrates an example in which the electronic device 100 includes the antenna assembly 1 shown in fig. 1. The antenna assembly 1 may be configured as in any of the foregoing embodiments.

In some embodiments, the surface of the radiation branch 11 with the largest area is a surface parallel to the frame surface of the frame B1, where the frame surface of the frame B1 is substantially perpendicular to the plane of the display screen of the electronic device 100.

As shown in fig. 5, the electronic device 100 includes a top end D11, a bottom end D12, and two side ends D13 and D14. The two long frames B11 are frames respectively located at two side edges D13 and D14 of the electronic device 100, and the two short frames B12 are frames respectively located at the top end D11 and the bottom end D12 of the electronic device 100.

In some embodiments, as shown in fig. 5, the radiation branch 11 may be in a straight bar shape, and the radiation branch 11 may be disposed at a short frame B12 of the electronic device 100 located at the top end D11. That is, in some embodiments, the radiating stub 11 may be disposed at a top end D11 of the electronic device 100.

Therefore, when the second set of frequency bands includes satellite communication frequency bands, since communication or positioning is required in a normal holding state, that is, in a holding state with the top end D11 facing upwards, and an antenna for implementing satellite communication is often required to face into the air to perform satellite alignment with a satellite located in the air, the radiation branch 11 may be disposed at the short frame B12 of the electronic device 100 located at the top end D11, so as to meet the requirement of satellite communication. And because the radiation branch 11 can support the receiving and transmitting of the electromagnetic wave signals of the first group of frequency bands under the cooperation of the first matched filtering unit 13, the radiation branch 11 can be effectively reused as the radiator of other frequency bands, and a plurality of frequency bands can be realized by utilizing the radiation branch with smaller size.

In some embodiments, the radiation branch 11 may also be bent, and a portion of the radiation branch is disposed at the top end D11, and another portion of the radiation branch is disposed at one of the side ends.

In some embodiments, when the second set of frequency bands does not include satellite communication frequency bands, for example, when the second set of frequency bands includes low frequency bands, wiFi 2.4G frequency bands, or intermediate frequency bands such as B3, B41, the radiating branches 11 may also be disposed at any one of the side edges, or may also be disposed at the bottom end D12, or the like.

The terms "top" and "bottom" used in describing the electronic device 100 according to the embodiments of the present application are mainly described according to the orientation of the electronic device 100 when the user holds the electronic device 100 in a hand, so that the position facing the top side of the electronic device 100 is "top" and the position facing the bottom side of the electronic device 100 is "bottom", which does not indicate or imply that the apparatus or element must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the orientation of the electronic device 100 in a practical application scenario. In some embodiments, the bottom end D12 of the electronic device 100 is an end portion provided with a headset hole and a USB hole, and the top end D11 of the electronic device 100 is another end portion opposite to the end portion provided with the headset hole and the USB hole, which may also refer to an end provided with a camera, a receiver, and the like.

As shown in fig. 5, in some embodiments, the electronic device further includes a ground plate 101, and the ground GND may be the ground plate 101.

That is, in some embodiments, the various element grounds described above may be realized for connection to the ground plate 101.

As shown in fig. 5, the electronic device 100 further includes a motherboard 102, where the aforementioned first feed 12, second feed 14, first matched filter unit 13, second matched filter unit 15, etc. may be disposed on the motherboard 102. In some embodiments, the ground plane 101 may be at least a partial region of a ground layer on the motherboard 102.

As shown in fig. 5, the electronic device 100 further includes a middle frame 103, where the middle frame 103 is used for supporting a structure such as a display screen, and the middle frame 103 is used as a whole ground, and a ground layer on the motherboard 102 is connected to the middle frame 103 to provide a ground potential. In some embodiments, the ground plate 101 may be at least a partial area of the middle frame 103, and the aforementioned ground GND may also be the at least a partial area of the middle frame 103. In fig. 5, the ground plate 101 is illustrated as an example of the middle frame 103.

The frame B1 of the electronic device 100 may further be provided with other antenna radiation branches, and the antenna radiation branches are disposed at intervals through a gap X0. These other antenna radiating branches are not illustrated, as they are not relevant to the improvements of the present application.

Referring to fig. 6 and fig. 7, fig. 6 is a schematic diagram of return loss obtained by performing a simulation test when the electronic device 100 operates in the first set of frequency bands, and fig. 7 is a schematic diagram of return loss obtained by performing a simulation test when the electronic device 100 operates in the second set of frequency bands.

Fig. 6 and fig. 7 may be schematic diagrams of return loss of the first set of frequency bands and return loss of the second set of frequency bands when the electronic device 100 operates in the first set of frequency bands and the second set of frequency bands at the same time.

In a certain frequency band, the frequency corresponding to the lowest point of the same input return loss curve is the resonance frequency point, and the lower the input return loss is, the lower the loss at the resonance frequency is, the higher the antenna radiation efficiency is.

In fig. 6 and 7, the first set of frequency bands includes an N78 frequency band (resonant frequency of about 3.5 GHz) and a WiFi 5G frequency band (resonant frequency of about 5.5 GHz), and the second set of frequency bands includes a GPS L5 frequency band (resonant frequency of about 1176.45 MHz) as an example.

As shown in fig. 6, the return loss at the resonance frequency of 3.5GHz in the N78 band is about-9 dB, the return loss is lower, and the return loss at the resonance frequency of 5.5GHz in the WiFi 5G band is lower, about-13.5 dB only, and the return loss is very low. As shown in fig. 7, the return loss in the GPS L5 band is lower than that in the WiFi 5G band by about-17 dB.

Therefore, the antenna assembly 1 of the electronic device 100 of the present application can support the first group of frequency bands and the second group of frequency bands simultaneously, and the return loss of the antenna operating in the first group of frequency bands and the second group of frequency bands is very low, so that the radiation efficiency of the antenna is high, and the radiation performance can be effectively ensured.

Referring to fig. 8, an isolation degree diagram obtained by performing a simulation test when the electronic device 100 is simultaneously operating in the first set of frequency bands and the second set of frequency bands is shown.

The smaller the amplitude corresponding to the isolation degree at a certain frequency band, the smaller the interference of the frequency band by other frequency bands, and the higher the isolation degree between the frequency bands.

In fig. 8, the first set of frequency bands includes an N78 frequency band (with a resonant frequency of about 3.5 GHz) and a WiFi 5G frequency band (with a resonant frequency of about 5.5 GHz), and the second set of frequency bands includes a GPS L5 frequency band (with a resonant frequency of about 1176.45 MHz) as an example.

As shown in fig. 8, the isolation is already very low at the resonance frequency of the second set of frequency bands, i.e. the GPS L5 frequency band, which is about-30 dB, whereby it can be seen that the isolation between the first set of frequency bands and the second set of frequency bands is high.

Therefore, as can be seen from fig. 8, the electronic device 100 can support two sets of frequency bands simultaneously by sharing the radiation branch 11, and the isolation between the two sets of frequency bands is higher, so that the interference between the two sets of frequency bands is smaller.

Referring to fig. 9, a schematic diagram of the overall system efficiency obtained by performing a simulation test when the electronic device 100 operates in the first set of frequency bands and the second set of frequency bands is shown.

Fig. 9 may be a schematic diagram of the overall system efficiency of the first set of frequency bands and the second set of frequency bands obtained when the electronic device 100 is simultaneously operated in the first set of frequency bands and the second set of frequency bands.

The peak value of the total efficiency curve of the system in the same frequency band generally corresponds to the trough value of the corresponding input echo curve.

As shown in fig. 9, at the position of 3.5GHz of the resonant frequency of the N78 frequency band, the total system efficiency of the N78 frequency band is maximum, approximately-4 dB, and the total system efficiency is high, so that good antenna efficiency can be achieved. At the position of 5.5GHz of the resonant frequency of the WiFi 5G frequency band, the total system efficiency of the WiFi 5G frequency band is maximum and is about-4 dB, the total system efficiency is high, and good antenna efficiency can be realized. At the position of the resonance frequency 1176.45MHz of the GPS L5 frequency band, the total system efficiency of the GPS L5 frequency band is maximum and is approximately-8.5 dB, the total system efficiency is higher, and good antenna efficiency can be realized.

It can be seen that the electronic device 100 according to the present application has high overall system efficiency at both the first set of frequencies and the second set of frequencies, and can achieve good radiation performance.

Fig. 10 is a schematic diagram illustrating an upper hemisphere duty ratio of the electronic device 100 operating in the second set of frequency bands according to some embodiments of the present application.

Fig. 10 is a schematic diagram of the upper hemisphere duty ratio, which is obtained by taking the second set of frequency bands including the GPS L5 frequency band and taking the electronic device 100 shown in fig. 5 operating in the GPS L5 frequency band as an example for simulation test.

The upper hemisphere ratio reflects the radiation energy ratio of the radiation energy toward the top end D11 of the electronic device 100, and when the upper hemisphere ratio is higher, it means that the higher the radiation energy ratio of the radiation energy toward the top end D11 of the electronic device 100 is, the higher the satellite communication performance of the satellite communication frequency band such as GPS L5 can be improved.

The upper hemisphere ratio when the electronic device 100 works in the GPS L5 frequency band is the difference between the bottom end value and the top end value, which is about-9.9 dB- (-6.7 dB) = -3.2dB, wherein the bottom end value reflects the omnidirectional radiation energy, the top end value reflects the radiation energy towards the top end D11 of the electronic device 100, the smaller the difference between the two values indicates that the upper hemisphere ratio is higher, as can be seen from fig. 10, the absolute value of the difference between-9.9 dB- (-6.7 dB) = -3.2dB is only 3.2dB, the difference is small, the upper hemisphere ratio is very high, and the satellite communication performance of satellite communication frequency bands such as GPS L5 and the like can be effectively improved.

Other structures of the antenna assembly 1 included in the electronic device 100 may be referred to in fig. 1 and the description of other related drawings, and are not repeated herein.

The electronic device 100 further includes a memory, a battery, etc., and is not described in detail because it is irrelevant to the improvement of the present application.

The electronic device 100 of the present application may be any electronic device having a communication function, such as a mobile phone, a tablet computer, a notebook computer, etc.

According to the antenna assembly 1 and the electronic device 100, the first matched filtering unit 13 is used for carrying out matched adjustment on the first group of frequency bands and filtering the second group of frequency bands, and the second matched filtering unit 15 is used for carrying out matched adjustment on the second group of frequency bands and filtering the first group of frequency bands, so that under the condition of sharing the feed point and the radiation branch 11, a plurality of different frequency bands can be supported, interference among the plurality of frequency bands can be avoided, and compared with the existing case that different radiation branches are needed to realize different frequency bands, more frequency bands can be realized by using fewer radiation branches, and the requirement of multiple antenna frequency bands can be met in a limited space.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The foregoing description is only specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily think about changes or substitutions within the technical scope of the present application, and the embodiments of the present application and features in the embodiments can be combined with each other without conflict. Therefore, the protection scope of the application is subject to the protection scope of the claims.

Claims

1. An antenna assembly, comprising:

Radiating branches, including feed points;

First feed source;

A first matched filter unit, connected between the first feed source and the feeding point;

a second feed; and

A second matched filter unit, connected between the second feed source and the feeding point;

Among them, the first feed source excites the radiating branch to support the transmission and reception of electromagnetic wave signals of the first group of frequency bands through the first matched filtering unit, and the second feed source excites the radiating branch to support the transmission and reception of electromagnetic wave signals of the second group of frequency bands through the second matched filtering unit, wherein the first group of frequency bands and the second group of frequency bands each include at least one frequency band, and the first group of frequency bands and the second group of frequency bands include different frequency bands, the first matched filtering unit is used to realize matching adjustment of the first group of frequency bands and filtering of the second group of frequency bands, and the second matched filtering unit is used to realize matching adjustment of the second group of frequency bands and filtering of the first group of frequency bands.

2 . The antenna assembly according to claim 1 , wherein the first group of frequency bands includes frequency bands higher than 3 GHz, and the second group of frequency bands includes frequency bands lower than 3 GHz.

3 . The antenna assembly according to claim 2 , wherein the first group of frequency bands includes a first frequency band and a second frequency band, and the second group of frequency bands includes a third frequency band.

4. The antenna assembly according to claim 2 is characterized in that the first frequency band and the second frequency band are respectively the N78 frequency band and the WiFi 5G frequency band, and the third frequency band is one of a satellite communication frequency band, a WiFi 2.4G frequency band, a low frequency band and a medium frequency band.

5 . The antenna assembly according to claim 4 , wherein the satellite communication frequency band comprises one of a GPS L1 frequency band, a GPS L5 frequency band, and a Beidou satellite communication frequency band.

6. The antenna assembly according to any one of claims 1-5 is characterized in that the first matching filtering unit includes a first matching circuit and a first filtering circuit, the first matching circuit is used to implement matching adjustment of the first group of frequency bands, and the first filtering circuit is used to filter out electromagnetic wave signals of the second group of frequency bands; the second matching filtering unit includes a second matching circuit and a second filtering circuit, the second matching circuit is used to implement matching adjustment of the second group of frequency bands, and the second filtering circuit is used to filter out electromagnetic wave signals of the first group of frequency bands.

7 . The antenna assembly according to claim 6 , wherein the first filter circuit is a high-pass filter circuit, and the second filter circuit is a medium- and low-pass filter circuit.

8. The antenna assembly according to claim 6 is characterized in that the first matching circuit and the first filtering circuit are connected in series between the first feed source and the feeding point, and the second matching circuit and the second filtering circuit are connected in series between the second feed source and the feeding point.

9. The antenna assembly according to claim 8 is characterized in that the first matching circuit includes a first inductor, a first capacitor and a second capacitor, and the first filtering circuit includes a second inductor and a third capacitor; the first inductor and the first capacitor are connected in series between the first feed source and the first filtering circuit, the second capacitor is connected between the first feed source and the ground, the third capacitor is connected between the first capacitor and the feeding point, the second inductor is connected between the first connection node and the ground, and the first connection node is the connection node between the third capacitor and the first capacitor; the second matching circuit includes a fourth capacitor and a fifth capacitor, the second filtering circuit includes a third inductor, the fourth capacitor is connected between the second feed source and the second filtering circuit, the fifth capacitor is connected between the second feed source and the ground, and the third inductor is connected between the feeding point and the fourth capacitor.

10 . The antenna assembly according to claim 9 , wherein the third inductor is a large inductor, and an inductance value of the third inductor is greater than an inductance value of the first inductor and an inductance value of the second inductor.

11. The antenna assembly according to claim 9 is characterized in that the capacitance values of the first capacitor and the second capacitor are both 0.7pF, the inductance value of the first inductor is 1nH, the inductance value of the second inductor is 2nH, the capacitance value of the third capacitor is 1pF, the inductance value of the third inductor is 22nH, the capacitance value of the fourth capacitor is 1.5pF, and the capacitance value of the fifth capacitor is 3pF.

12. The antenna assembly according to any one of claims 1-5, characterized in that the radiating branch comprises a first end and a second end opposite to each other, the first end is an open end, the second end is grounded, and the feeding point is located between the first end and the second end.

13. An electronic device, characterized in that the electronic device comprises the antenna assembly according to any one of claims 1-12.

14 . The electronic device according to claim 13 , further comprising a frame, and the radiation branch is a metal segment arranged on the frame.

15 . The electronic device according to claim 13 or 14 , wherein the electronic device comprises a top end, a bottom end and two side ends, and the radiation branch is arranged at the top end of the electronic device.