CN217158628U

CN217158628U - Radio frequency device and electronic equipment

Info

Publication number: CN217158628U
Application number: CN202220643620.7U
Authority: CN
Inventors: 史大为
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-09
Anticipated expiration: 2032-03-22

Abstract

An embodiment of the present application provides a radio frequency device and an electronic apparatus, where the radio frequency device includes: the frequency-selective feed circuit comprises a first branch node, a second branch node, a first feed point, a second feed point, a first feed source, a second feed source, a first frequency-selective circuit and a second frequency-selective circuit; a gap is arranged between the first branch knot and the second branch knot; the first feeding point and the first feeding point are respectively arranged on the first branch knot, and the second feeding point are respectively arranged on the second branch knot; the first frequency selection circuit is a low-resistance high-pass circuit, one end of the first frequency selection circuit is connected with the first feed point, the other end of the first frequency selection circuit is grounded, and the first frequency selection circuit is used for enabling the first branch node to generate first parasitic resonance based on a signal coupled by the first branch node; the second frequency selection circuit is a low-resistance high-pass circuit, one end of the second frequency selection circuit is connected with the second feed point, the other end of the second frequency selection circuit is grounded, and the second frequency selection circuit is used for enabling the second branch to generate second parasitic resonance based on a signal coupled by the second branch.

Description

Radio frequency device and electronic equipment

Technical Field

The present application relates to the field of communications technologies, and in particular, to a radio frequency device and an electronic apparatus.

Background

With the rapid development of wireless communication technology, people use mobile electronic devices such as mobile phones and tablet computers more widely in daily life. The radio frequency device is a main electronic component that realizes a communication function of the electronic apparatus, and is also one of indispensable electronic components. However, as modules such as a screen and a camera in an electronic device need to occupy more and more volume space, the layout space of the radio frequency device is further compressed, so that the total efficiency (total efficiency) of some frequency bands in the existing electronic device is low.

SUMMERY OF THE UTILITY MODEL

The present application provides a radio frequency device and an electronic apparatus to improve the above-mentioned drawbacks.

In a first aspect, an embodiment of the present application provides a radio frequency device, including: the frequency-selective feed circuit comprises a first branch node, a second branch node, a first feed point, a second feed point, a first feed source, a second feed source, a first frequency-selective circuit and a second frequency-selective circuit; gaps are formed between the first branches and the second branches; the first feeding point and the first feeding point are respectively arranged on the first branch knot, and the second feeding point are respectively arranged on the second branch knot; the first frequency selection circuit is a low-resistance high-pass circuit, one end of the first frequency selection circuit is connected with the first feed point, the other end of the first frequency selection circuit is grounded, the first frequency selection circuit is used for enabling the first stub to generate a first parasitic resonance based on a signal coupled by the first stub, and the passband frequency of the low-resistance high-pass circuit is related to the frequency of the signal coupled by the first stub; the second frequency-selecting circuit is a low-resistance high-pass circuit, one end of the second frequency-selecting circuit is connected with the second feed point, the other end of the second frequency-selecting circuit is grounded, the second frequency-selecting circuit is used for enabling the second stub to generate second parasitic resonance based on a signal coupled by the second stub, and the stop-band frequency of the low-resistance high-pass circuit is related to the frequency of the signal coupled by the second stub.

Further, according to the radio frequency device provided by the first aspect, the second frequency selection circuit includes: a first inductor and a first capacitor; one end of the first inductor is connected with the second feeding point, and the other end of the first inductor is grounded; one end of the first capacitor is connected with the second feeding point, and the other end of the first capacitor is grounded.

Further, according to the radio frequency device provided by the first aspect, the second frequency selection circuit further includes: a second inductor; one end of the second inductor is connected with the other end of the first inductor, and the other end of the second inductor is grounded; the first inductor, the first capacitor and the second inductor form a low-resistance high-pass circuit.

Further, according to the radio frequency device provided by the first aspect, the second frequency selection circuit further includes: a switch; when the switch is turned on, the second frequency selection circuit generates the second parasitic resonance.

Further, according to the radio frequency device provided by the first aspect, the first frequency selection circuit includes: a third inductor and a second capacitor; one end of the third inductor is connected with the first feeding point, and the other end of the third inductor is grounded; one end of the second capacitor is connected with the first feeding point, and the other end of the second capacitor is grounded.

Further, according to the radio frequency device provided by the first aspect, the first frequency selection circuit further includes: a fourth inductor; one end of the fourth inductor is connected with the other end of the third inductor, and the other end of the fourth inductor is grounded; the third inductor, the second capacitor and the fourth inductor form a low-resistance high-pass circuit.

Further, according to the first aspect, there is provided a radio frequency device, further comprising: a fifth inductor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor; one end of the fifth inductor is connected with the second feeding point, the other end of the fifth inductor is connected with one end of the third capacitor, the other end of the third capacitor is connected with one end of the fourth capacitor, the other end of the fourth capacitor is connected with the second feeding source, one end of the fifth capacitor is connected with the other end of the third capacitor, the other end of the fifth capacitor is grounded, one end of the sixth capacitor is connected with the other end of the fourth capacitor, and the other end of the sixth capacitor is grounded.

Further, according to the first aspect, there is provided a radio frequency device, further comprising: a seventh capacitor, a sixth inductor and a seventh inductor; one end of the seventh capacitor is connected to the first feeding point, the other end of the seventh capacitor is connected to the sixth inductor, the other end of the sixth inductor is connected to the first feeding source, one end of the seventh inductor is connected to the other end of the sixth inductor, and the other end of the seventh inductor is grounded.

Further, according to the radio frequency device provided by the first aspect, the low-resistance high-pass circuit is a stop band in the L5 frequency band and a band-pass in the B1 frequency band or higher.

Further, according to the radio frequency device provided by the first aspect, the first operating signal generated by the first feeding source includes at least one of B1, 40, 41, N41 and N78 frequency bands, and the fourth operating signal corresponding to the second parasitic resonance includes at least one of B1, 40, 41, N41 and N78 frequency bands; the third working signal generated by the second feeding source comprises an L5 frequency band, and the second working signal corresponding to the first parasitic resonance comprises an L5 frequency band.

In a second aspect, an embodiment of the present application further provides an electronic device, including: a middle frame and the radio frequency device of the first aspect; the middle frame is grounded, and a first feed point and a second feed point of the radio frequency device are respectively connected with the middle frame.

The radio frequency device and the electronic equipment provided by the application enable the first branch to generate a first parasitic resonance based on a signal coupled with the first branch by utilizing the first frequency selection circuit, and enable the second branch to generate a second parasitic resonance based on a signal coupled with the second branch by utilizing the second frequency selection circuit. Because first frequency-selecting circuit and second frequency-selecting circuit can not form the interference to the frequency channel that first feeder source and second feeder source produced in the radio frequency device, consequently this application can be under the condition that does not influence first stub or second stub resonance itself, through first parasitic resonance, promoted the total efficiency of the frequency channel that this first parasitic resonance corresponds to and through second parasitic resonance, promoted the total efficiency of the frequency channel that this second parasitic resonance corresponds.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a block diagram illustrating an electronic device provided in an embodiment of the present application;

fig. 2 is a schematic structural diagram of a radio frequency device provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of another radio frequency device provided in the embodiment of the present application;

fig. 4 is a block diagram illustrating a second frequency selection circuit in the radio frequency device according to the embodiment of the present application;

fig. 5 is a block diagram illustrating a second frequency selecting circuit in the radio frequency device according to the embodiment of the present application;

fig. 6 is a structural diagram of a second frequency selecting circuit in the radio frequency device according to the embodiment of the present application;

fig. 7 is a schematic structural diagram of a radio frequency device according to another embodiment of the present application;

fig. 8 is a block diagram illustrating a first frequency selection circuit in the radio frequency device according to the embodiment of the present application;

fig. 9 is a block diagram illustrating a further first frequency selecting circuit in the radio frequency device according to the embodiment of the present application;

fig. 10 is a schematic diagram illustrating an S parameter in a radio frequency device according to an embodiment of the present application;

fig. 11 is a schematic diagram illustrating a further S parameter in the rf device according to the embodiment of the present application;

fig. 12 is a schematic structural diagram of a radio frequency device according to still another embodiment of the present application;

fig. 13 is a schematic diagram illustrating the overall efficiency of the radio frequency device provided by the embodiment of the present application;

fig. 14 is a block diagram of an electronic device according to still another embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the application. In order to simplify the disclosure of the present application, specific example components and arrangements are described below. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

With the rapid development of wireless communication technology, people use mobile electronic devices such as mobile phones and tablet computers more widely in daily life. The radio frequency device is a main electronic component that realizes a communication function of the electronic apparatus, and is also one of indispensable electronic components. However, since modules such as a screen and a camera in an electronic device need to occupy more and more volume space, the layout space of the radio frequency device is further compressed, which results in lower overall efficiency of some frequency bands in the existing electronic device. Therefore, how to improve the overall efficiency of some frequency bands in the electronic device becomes a problem to be solved urgently.

For some electronic devices, a certain branch on the electronic device may resonate to generate a signal of a first frequency, and then a pre-designed circuit is used to generate a parasitic resonance of the first frequency on the branch, wherein the branch is shared by the resonance and the parasitic resonance, so as to improve the overall efficiency of the first frequency. Wherein the total efficiency may be used to characterize the efficiency of the electronic device in converting input power to radiated power.

However, the inventors have found that, in the electronic device, although the total efficiency of the first frequency can be improved to some extent, the resonance generated by the branch itself and the parasitic resonance in the electronic device share the branch, so that the branch length is short, and the effect of improving the total efficiency of the first frequency is weak.

Accordingly, the present application provides a radio frequency device and an electronic apparatus to solve or partially solve the above problems. Embodiments of the present application will be described in detail below with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 shows an electronic device, which includes a middle frame 150, a front case 110 and a rear cover 120, where the middle frame 150 includes a middle plate (e.g., 220 in fig. 2) and a rim (e.g., 230 in fig. 2), where the rim 230 surrounds the middle plate 220 and is connected to the middle plate 220. The middle plate 220 includes a first side and a second side opposite to each other, the rear cover 120 is mounted on the first side of the middle plate, the front case 110 is mounted on the second side of the middle plate, specifically, the front case 110 and the rear cover 120 are both mounted on the bezel 230 and form a closed housing, and the front case 110 may include the display screen 160. The front case 110 and the rear cover 120 together enclose a receiving space to receive other constituent elements, such as the main board 240 and the battery 250.

In some embodiments, the front case 110 and the rear cover 120 may be metal housings. It should be noted that the material of the front shell 110 and the rear cover 120 in the embodiment of the present application is not limited thereto, and other manners may also be adopted, such as: the front case 110 and the rear cover 120 may include a plastic part and a metal part. For another example: the front case 110 and the rear cover 120 may be a plastic case, a ceramic case, or the like.

The protective cover plate can be a glass cover plate, a sapphire cover plate, a plastic cover plate and the like, and provides a protective effect for the display screen 160 so as to prevent dust, water vapor or oil stains and the like from being attached to the display screen, avoid the corrosion of the external environment to the display screen 160, prevent the impact force of the external environment to the display screen 160 and avoid the breakage of the display screen 160.

The protective cover may include a display area and a non-display area. The display area is transparent and corresponds to the light-emitting surface of the display screen 160. The non-display area is non-transparent to shield the internal structure of the electronic device. The non-display area may be provided with openings for sound and light transmission.

It should be noted that the electronic device 100 of the embodiment of the present application may also be designed as a full screen without reserving a non-display area. The electronic device 100 may be provided with an earphone hole, a microphone hole, a speaker hole, a universal serial bus interface hole at its periphery. The earphone hole, the microphone hole, the speaker hole and the USB interface hole are all through holes, are formed on the frame, and can be electrically connected with the mainboard 240 in the accommodating space.

Referring to fig. 2, fig. 2 shows a radio frequency device 200, and the radio frequency device 200 can be applied to the electronic apparatus 100 shown in fig. 1. The radio frequency device 200 includes a first branch 201, a second branch 202, a first feeding point 203, a second feeding point 204, a first feeding point 205, a second feeding point 206, a first feeding source 209, a second feeding source 210, a first frequency selecting circuit 207, and a second frequency selecting circuit 208. The rf device 200 may be disposed in a receiving space defined by the front housing 110 and the rear cover 120, the middle frame 150 may be grounded, and the first feed point 205 and the second feed point 206 may be connected through the middle frame 150, thereby achieving grounding. Referring to the structure diagram of the rf device 200 shown in fig. 3, a gap 211 is formed between the first branch 201 and the second branch 202; the first feeding point 203 and the first feeding point 205 are respectively disposed on the first branch 201, and the second feeding point 204 and the second feeding point 206 are respectively disposed on the second branch 202; the first feeding source 209 is connected to the first feeding point 203, the first feeding point 203 is connected to the first branch 201, and the first branch is further connected to a first feeding point 205. The rf signal generated by the first feeding source 209 is fed into the first branch 201 through the first feeding point 203, and is grounded through the first feeding point 205 connected to the first branch 201 to form a loop, and the first branch 201 resonates the rf signal generated by the first feeding source 209 and transmits the rf signal through the first branch. A second feed 210 is connected to the second feed point 204, the second feed point 204 is connected to the second branch 202, and a second feed point 206 is further connected to the second branch. The rf signal generated by the second feeding source 210 is fed to the second branch 202 through the second feeding point 204, and is grounded through the second feeding point 206 connected to the second branch 202 to form a loop, and the second branch 202 resonates the rf signal generated by the second feeding source 210 and transmits the rf signal through the second branch.

Since electronic devices typically have more than one stub, radio frequency signals transmitted through only a single stub are less efficient. Therefore, when one of the branches transmits a radio frequency signal, the other branch can be used as a parasitic branch of the branch to generate a parasitic radio frequency signal which can improve the efficiency of the radio frequency signal. Specifically, the spurious radio frequency signal can be realized by the first frequency selecting circuit 207 and the second frequency selecting circuit 208.

One end of the first frequency selecting circuit 207 is connected to the first feeding point 203, and the other end is grounded; one end of the second frequency selecting circuit 208 is connected to the second feeding point 204, and the other end is grounded.

Through the first frequency selecting circuit 207, a first frequency corresponding to the first frequency selecting circuit 207 can be obtained, so that the first branch 201 can generate a first parasitic resonance based on the first frequency. Through the second frequency selecting circuit 208, a second frequency corresponding to the second frequency selecting circuit 208 can be obtained, so that the first branch 201 can generate a first parasitic resonance based on the first frequency.

For some embodiments, the first frequency selective circuit 207 is a low resistance high pass circuit. When the first frequency selecting circuit 207 is coupled to a first signal based on the first stub 201, if the first signal satisfies a frequency band corresponding to a passband of the first frequency selecting circuit 207, that is, the first signal cannot be grounded from the first frequency selecting circuit 207 to form a loop, at this time, the first signal may be grounded through the first feed point 205 to form a loop, and at this time, the first stub 201 may generate a first parasitic resonance.

For some embodiments, the second frequency selective circuit 208 is a low resistance high pass circuit. When the second frequency selecting circuit 208 is coupled to the second signal based on the second stub 202, if the second signal satisfies the frequency band corresponding to the passband of the second frequency selecting circuit 208, that is, the second signal may be grounded from the second frequency selecting circuit 208 to form a loop, and at this time, the second signal may be grounded through the second feeding point 204 through the second frequency selecting circuit 208 to form a loop, and at this time, the second stub 202 may generate a second parasitic resonance.

For some embodiments, the first feeding point 203 and the first feeding point 205 are respectively disposed on the first branch 201, and the second feeding point 204 and the second feeding point 206 are respectively disposed on the second branch 202. A gap 211 may be disposed between the first branch 201 and the second branch 202, and a width of the gap 211 may be specifically set according to needs, which is not limited herein. For example, the distance between the first feeding point 203 on the first branch 201 and the slot 211 may be smaller than the distance between the first feeding point 205 on the first branch 201 and the slot 211; the distance between the second feeding point 204 on the second branch 202 and the slot 211 may be smaller than the distance between the second feeding point 206 on the second branch 202 and the slot 211.

Further, the gap 211 has a certain capacitance under the rf signal, i.e., can be equivalent to a capacitor. Through the gap 211, when the first branch 201 resonates, the second branch 202 generates a certain induced electromotive force, that is, the second branch 202 can be coupled to a radio frequency with the same frequency band as the first branch 201; or when the second branch 202 resonates, the first branch 201 may generate a certain induced electromotive force, that is, the first branch 201 may be coupled to a radio frequency having the same frequency band as the second branch 202.

For some embodiments, the first branch 201 and the second branch 202 may share an antenna, where a shared antenna means that the first branch 201 and the second branch 202 share the same metal radiator, and the two branches differ in the length of the metal radiator. By sharing the radiator, the number of slots 211 can be reduced as much as possible with limited headroom of the rf device 200, and the rf device 200 capable of covering more bands can be designed.

For some embodiments, the signal generated by the first feeding source 209 may be transmitted to the first branch 201 through the first feeding point 203, or the signal received by the first branch 201 may be transmitted to the first feeding source 209 through the first feeding point 203. The signal generated by the second feeding source 210 can be transmitted to the second branch 202 through the second feeding point 204, or the signal received by the second branch 202 is transmitted to the second feeding source 210 through the second feeding point 204.

It is easy to understand that, the frequency band of the radio frequency signal of a certain frequency band sent by one branch is limited in bandwidth or low in efficiency, and at this time, some frequency bands of the radio frequency signal can be supplemented by another branch, or the radio frequency signal of the same frequency band is sent to improve the efficiency of the radio frequency signal of the frequency band. Thus, the parasitics are those in which one branch is parasitically removed based on the frequency band of the signal transmitted by the other branch. Therefore, in this embodiment, the first branch 201 may be used to transmit signals in a frequency band generated by the first feed 209, and the second branch 202 may be used to transmit signals in a frequency band generated by the second feed 210. The rf signal generated by the first feeding source 209 is fed into the first branch 201 through the first feeding point 203, and is grounded through the first feeding point 205 connected to the first branch 201 to form a loop, and the first branch 201 resonates the rf signal generated by the first feeding source 209 and transmits the rf signal through the first branch. The second feeding source 210 is connected to the second feeding point 204, the second feeding point 204 is connected to the second branch 202, and the second branch 202 is further connected to the second feeding point 206. The rf signal generated by the second feeding source 210 is fed to the second branch 202 through the second feeding point 204, and is grounded through the second feeding point 206 connected to the second branch 202 to form a loop, and the second branch 202 resonates with the rf signal generated by the second feeding source 210 and transmits the rf signal through the second branch 202. Further, the first branch 201 may also be used to transmit a radio frequency signal coupled by the first branch 201, and the second branch 202 may also be used to transmit a radio frequency signal coupled by the second branch 202. Specifically, the frequency of the radio frequency signal to which the first branch 201 is coupled may be selected based on the first frequency selecting circuit 207, so that the first branch 201 transmits a signal of the frequency selected by the first frequency selecting circuit. The frequency of the radio frequency signal to which the second stub 202 is coupled may be selected based on the second frequency selection circuitry 208, causing the second stub 202 to transmit a signal at the frequency selected by the second frequency selection circuitry.

For the embodiments provided herein, the first feed 209 may generate at least one of signals in the B1 (1920-.

For some embodiments, in order for the first stub 201 to realize a parasitic resonance to a certain frequency, the first frequency selecting circuit 207 needs to have the capability of selecting a frequency, i.e., the first frequency selecting circuit 207 may be a filter circuit. The filter circuit can prevent the signal of the frequency needed to realize the parasitic resonance from passing through, and can select the frequency by passing through the signals of other frequencies. In the embodiments provided in the present application, the second feeding source may generate signals in the L5 frequency band, and therefore the first frequency selection circuit 207 needs to be able to select signals in the L5 frequency band, that is, the first frequency selection circuit 207 needs to have a low-frequency band rejection characteristic. Since the first frequency selecting circuit 207 needs to pass signals except for the L5 frequency band, the first frequency selecting circuit 207 may be a band-stop circuit, wherein the frequency corresponding to the stop band is the L5 frequency band. The first frequency selecting circuit 207 may also be a low-resistance high-pass circuit, wherein the frequency corresponding to the low-resistance band is the L5 frequency band.

For some embodiments, the first frequency selecting circuit 207 is a low-impedance high-pass circuit, a pass band frequency of the low-impedance high-pass circuit is related to a frequency of a signal coupled to the first branch 201, one end of the first frequency selecting circuit 207 is connected to the first feeding point 203, and the other end is grounded, and the first frequency selecting circuit 207 is configured to generate a first parasitic resonance on the first branch 201 based on the signal coupled to the first branch 201. For example, if the signal sent by the second branch 202 is in the L5 band, the first branch 201 may be coupled to the signal in the L5 band, and the first frequency selection circuit 207 may generate a first parasitic resonance on the first branch 201 based on the signal in the L5 band coupled to the first branch 201, where a frequency corresponding to the first parasitic resonance is the L5 band.

The first frequency selecting circuit 207 is a low-resistance high-pass circuit, that is, the first frequency selecting circuit 207 can achieve a filtering effect of low resistance and high pass. For example, the first frequency selecting circuit 207 may exhibit a stopband effect on Low frequency (LB) signals and a passband effect on medium High frequency (MHB) signals. For example, the low-resistance high-pass circuit can prevent signals in the L5 frequency band from passing through and can enable signals in a frequency band greater than or equal to the B1 frequency band to pass through. Due to the characteristics of the low-resistance high-pass circuit, if the circuit is a pass band for the B1 frequency band, the pass bands for the N40, N41 and N78 frequency bands larger than the B1 frequency band can be regarded as pass bands.

For some embodiments, in order for the second stub 202 to achieve a parasitic resonance at a certain frequency, the second frequency selective circuit 208 needs to be able to have the capability of selecting a frequency, i.e. the second frequency selective circuit 208 may be a filter circuit. The filter circuit can block signals of other frequencies by means of frequency signals which are required to realize parasitic resonance, i.e. the frequency can be selected. In the embodiment provided in the present application, the first power supply may generate signals in at least one of the B1, N40, N41 and N78 frequency bands, and therefore the second frequency selection circuit 208 needs to be able to select signals in at least one of the B1, N40, N41 and N78 frequency bands, that is, the second frequency selection circuit 208 needs to have a middle-high frequency band pass characteristic. Since the second frequency selecting circuit 208 needs to block signals except for the B1, N40, N41, and N78 frequency bands, the second frequency selecting circuit 208 may be a band pass, wherein the blocking frequencies include the B1, N40, N41, and N78 frequency bands. The second frequency selecting circuit 208 may also be a low-resistance high-pass circuit, wherein the frequencies corresponding to the high-pass band include B1, N40, N41, and N78 frequency bands.

For some embodiments, the second frequency selective circuit 208 is a low impedance high pass circuit, a stop band frequency of the low impedance high pass circuit is related to a frequency of a signal coupled to the second stub 202, one end of the second frequency selective circuit 208 is connected to the second feeding point 204, and the other end is grounded, and the second frequency selective circuit 208 is configured to generate a second parasitic resonance for the second stub 202 based on the signal coupled to the second stub 202. The low resistance and high pass can be referred to the above description, and will not be described herein. The frequency corresponding to the second parasitic resonance is the frequency of the signal coupled to the second stub 202.

In the radio frequency device 200 and the electronic apparatus 100 provided by the present application, the first frequency selection circuit 207 is used to generate a first parasitic resonance in the first branch 201 based on the signal coupled to the first branch 201, and the second frequency selection circuit 208 is used to generate a second parasitic resonance in the second branch 202 based on the signal coupled to the second branch 202. Because the first frequency selecting circuit 207 and the second frequency selecting circuit 208 do not interfere with the frequency bands generated by the first feeding source 209 and the second feeding source 210 in the radio frequency device 200, the total efficiency of the frequency band corresponding to the first parasitic resonance is improved through the first parasitic resonance and the total efficiency of the frequency band corresponding to the second parasitic resonance is improved through the second parasitic resonance under the condition that the resonance of the first stub 201 or the second stub 202 is not affected.

Referring to fig. 4, for some embodiments, the second frequency selecting circuit 208 includes: a first inductor L1 and a first capacitor C1; one end of the first inductor L1 is connected to the second feeding point 204, and the other end is grounded; one end of the first capacitor C1 is connected to the second feeding point 204, and the other end is grounded.

Referring to fig. 5, for other embodiments, the second frequency selecting circuit 208 further includes: a second inductance L2; one end of the second inductor L2 is connected with the other end of the first inductor L1, and the other end of the second inductor L2 is grounded; the first inductor L1, the first capacitor C1 and the second inductor L2 form a low-resistance high-pass circuit.

Further, the first inductor L1 or the second inductor L2 may be a fixed inductor, the first capacitor C1 may be a fixed capacitor, and the effect of passing or blocking a specific frequency signal may be achieved by presetting the parameters of the first inductor L1, the second inductor L2, and the first capacitor C1. For example, if the first inductor L1 is x nh, the first capacitor C1 is y pf, and the second inductor L2 is z nh, the signal of the a Mhz frequency band can be prevented from passing through, and the signal of the B Mhz frequency band or higher can be allowed to pass through. Specifically, for one embodiment provided herein, the first inductor L1 may be 30nh, the first capacitor C1 may be 0.8pf, and the second inductor L2 may be 3.3 nh. At this time, the second frequency selection circuit 208 formed by the first inductor L1, the second inductor L2, and the first capacitor C1 can pass signals of a frequency band greater than or equal to B1. Wherein nh is inductance unit nanohenry, pf is capacitance unit picofarad, and Mhz is frequency unit megahertz.

Further, the first inductor L1 or the second inductor L2 may also be an adjustable inductor, and the first capacitor C1 may also be an adjustable capacitor, so that parameters of the first inductor L1, the second inductor L2, and the first capacitor C1 may be conveniently adjusted, and thus a required low-resistance high-pass circuit is obtained. Through the low-resistance high-pass circuit, the first parasitic resonance generated on the signal coupled by the second branch 202 can be realized, and the total efficiency of the signal is improved. For the embodiments provided herein, the second stub 202 may couple at least one signal of the B1, N40, N41, and N78 segments, generate a second parasitic resonance in the second stub 202 through the second frequency selection circuit 208, and then transmit a signal of the same frequency band as the frequency band to which the second stub 202 is coupled through the second stub 202. The frequency band signal coupled by the second branch 202 can be transmitted by the first branch 201. Specifically, the first power supply 209 may generate at least one signal in B1, N40, N41, and N78 frequency bands, resonate through the first stub 201, and then transmit.

Referring to fig. 6, for some embodiments, the second frequency selecting circuit 208 further includes: a switch; when the switch is turned on, the second frequency-selecting circuit 208 generates the second parasitic resonance. Specifically, one end of the switch is connected to the other end of the second inductor L2, and the other end of the switch is grounded. When the switch is turned on, a low-resistance high-pass circuit formed by the first inductor L1, the first capacitor C1 and the second inductor L2 can form a loop through switch grounding, so that low-frequency signals are prevented from passing through, and medium-high frequency signals are enabled to pass through. When the switch is turned off, the low-resistance high-pass circuit formed by the first inductor L1, the first capacitor C1 and the second inductor L2 cannot be grounded through the switch, and therefore, the effect of low-resistance high-pass on signals cannot be achieved. The first limb 201 now resonates only for the signal generated by the first feed 209. Through the switch and the second frequency selecting circuit 208, the radio frequency device 200 can simultaneously achieve band elimination of low-frequency signals and band-pass or band elimination of medium-high frequency signals, wherein the band elimination of the low-frequency signals and the band-pass of the medium-high frequency signals can be achieved through the second frequency selecting circuit 208 when the switch is turned on, and the band elimination of the medium-high frequency signals can be achieved through the second frequency selecting circuit 208 when the switch is turned off.

Referring to fig. 7, the rf device 200 further includes: a fifth inductor L5, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, and a sixth capacitor C6. For some embodiments, one end of the fifth inductor L5 is connected to the second feeding point 204, the other end of the fifth inductor L5 is connected to one end of the third capacitor C3, the other end of the third capacitor C3 is connected to one end of the fourth capacitor C4, the other end of the fourth capacitor C4 is connected to the second feeding source 210, one end of the fifth capacitor C5 is connected to the other end of the third capacitor C3, the other end of the fifth capacitor C5 is grounded, one end of the sixth capacitor C6 is connected to the other end of the fourth capacitor C4, and the other end of the sixth capacitor C6 is grounded.

The fifth inductor L5, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, and the sixth capacitor C6 may be configured to match a signal generated by the second feeding source 210, so that the second branch 202 may resonate based on the signal generated by the second feeding source 210. For example, the second feed source 210 may generate a signal in the L5 frequency band. For an embodiment provided by the present application, the fifth inductor L5 may be 5.6nh, the third capacitor C3 may be 3.9pf, the fourth capacitor C4 may be 1pf, the fifth capacitor C5 may be 2.7pf, and the sixth capacitor C6 may be 1 pf.

Referring to fig. 8, for some embodiments, the first frequency selecting circuit 207 includes: a third inductor L3 and a second capacitor C2; one end of the third inductor L3 is connected to the first feeding point 203, and the other end is grounded; one end of the second capacitor C2 is connected to the first feeding point 203, and the other end is grounded.

Referring to fig. 9, for other embodiments, the first frequency selecting circuit 207 further includes: a fourth inductance L4; one end of the fourth inductor L4 is connected to the other end of the third inductor L3, and the other end of the fourth inductor L4 is grounded; the third inductor L3, the second capacitor C2 and the fourth inductor L4 form a low-resistance high-pass circuit.

Further, the third inductor L3 or the fourth inductor L4 may be a fixed inductor, the second capacitor C2 may be a fixed capacitor, and the magnitude of the parameter of the third inductor L3, the magnitude of the parameter of the fourth inductor L4, and the magnitude of the parameter of the second capacitor C2 may be preset to achieve the effect of passing or blocking the specific frequency signal. For example, if the third inductor L3 is x nh, the second capacitor C2 is y pf, and the fourth inductor L4 is z nh, the signal of the a Mhz frequency band can be prevented from passing through, and the signal of the B Mhz frequency band or higher can be allowed to pass through. Specifically, for one embodiment provided herein, the third inductance L3 may be 5.1nh, the second capacitance C2 may be 3.9pf, and the fourth inductance L4 may be 6.2 nh. At this time, the first frequency selecting circuit 207 including the third inductor L3, the fourth inductor L4, and the second capacitor C2 can prevent signals in the L5 band from passing through, and can allow signals in the B1 band or higher to pass through.

Further, the third inductor L3 or the fourth inductor L4 may also be an adjustable inductor, and the second capacitor C2 may also be an adjustable capacitor, so that the parameters of the third inductor L3, the fourth inductor L4, and the second capacitor C2 may be conveniently adjusted, thereby obtaining a required low-resistance high-pass circuit. Through the low-resistance high-pass circuit, the first parasitic resonance generated on the signal coupled by the first branch 201 can be realized, and the total efficiency of the signal is improved. For the embodiment provided by the present application, the first stub 201 may couple a signal in the L5 frequency band, generate a first parasitic resonance in the first stub 201 through the first frequency-selecting circuit 207, and then transmit a signal in the L5 frequency band through the first stub 201. The signal of the L5 frequency band coupled by the first branch 201 can be transmitted by the second branch 202. Specifically, the second feeding source 210 may generate a signal in the L5 band, resonate through the second stub 202, and then transmit.

According to the low-resistance high-pass circuit formed by the first frequency selecting circuit 207, when the second branch 202 transmits signals of the L5 frequency band, the first branch 201 is used for coupling the signals of the L5 frequency band, first parasitic resonance is generated, then the signals of the L5 frequency band are transmitted through the first branch 201, and the total efficiency of the radio frequency device 200 for transmitting the signals of the L5 frequency band can be improved.

Referring to fig. 10 and fig. 11 together, in the general efficiency diagram of the L5 frequency band shown in fig. 10, the rf device 200 only generates a signal of the L5 frequency band through the second feeding source 210, and transmits the signal through the second branch 202; fig. 11 shows a schematic diagram of the total efficiency of the L5 frequency band, in which a first branch 201 in the radio frequency device 200 couples a signal transmitted by a second branch 202, the first branch 201 generates a first parasitic resonance to the L5 frequency band through the first frequency selection circuit 207, and transmits a signal of the L5 frequency band through the first branch 201. In fig. 10 and 11, the horizontal axis of the coordinates is frequency and is represented by Ghz, and the vertical axis of the coordinates is total efficiency and is represented by dB. The point a in fig. 10 can learn that the total efficiency of the L5 frequency band is at most-10.979 Db at this time; the point B in fig. 11 can be seen to find that the total efficiency of the L5 band is at most-12.614 dB. As can be known from-10.979 Db- (-12.614Db) ═ 1.635Db, in the embodiment provided in the present application, when the second branch 202 transmits a signal in the L5 frequency band, the first branch 201 couples the signal in the L5 frequency band, and the first branch 201 generates the first parasitic resonance and then transmits a signal in the L5 frequency band, so that the total efficiency of the radio frequency device 200 transmitting the signal in the L5 frequency band is improved by about 1.635 Db.

Referring to fig. 12, for some embodiments, the rf device 200 further includes: a seventh capacitor C7, a sixth inductor L6, and a seventh inductor L7; one end of the seventh capacitor C7 is connected to the first feeding point 203, the other end of the seventh capacitor C7 is connected to the sixth inductor L6, the other end of the sixth inductor L6 is connected to the first feeding source 209, one end of the seventh inductor L7 is connected to the other end of the sixth inductor L6, and the other end of the seventh inductor L7 is grounded.

The seventh capacitor C7, the sixth inductor L6, and the seventh inductor L7 may be configured to match a signal generated by the first power supply 209, so that the first branch 201 may resonate based on the signal generated by the first power supply 209. For example, the first feeding source 209 may generate at least one of signals of B1, 40, 41, N41, and N78 bands. For one embodiment provided herein, the seventh capacitor C7 is 0.8pf, the sixth inductor L6 is 1.5nh, and the seventh inductor L7 is 4.7 nh.

It is easy to understand that whether the stub can resonate to a certain frequency band may be determined by the fifth inductor L5, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5, the sixth capacitor C6 or the seventh capacitor C7, the sixth inductor L6, and the seventh inductor L7. Specifically, the frequency of resonance generated by the second branch 202 can be determined by the fifth inductor L5, the third capacitor C3, the fourth capacitor C4, the fifth capacitor C5 and the sixth capacitor C6; the frequency of the resonance generated by the first stub 201 can be determined by the seventh capacitor C7, the sixth inductor L6 and the seventh inductor L7.

Referring to fig. 13, fig. 13 shows a graph of an S-parameter for embodiments provided herein. In fig. 13, the horizontal axis of the coordinate is frequency and has a unit of Ghz, and the vertical axis of the coordinate is S parameter and has a unit of dB. The solid line represents the S-parameter curve corresponding to the second branch 202, and the dotted line represents the S-parameter curve corresponding to the first branch 201. In fig. 13, the smaller the value of the ordinate of a certain point is, the stronger the ability of the current branch node to resonate at the frequency corresponding to the point is represented. As can be seen from fig. 13, for the embodiment of the present application, the second branch 202 has better resonance capability in the L band, and the first branch 201 has better resonance capability in the B1, 40, 41, N41, and N78 bands.

Referring to fig. 14, fig. 14 is a block diagram illustrating an electronic device 300 according to an embodiment of the disclosure. The electronic device 300 comprises a middle frame 310 and the radio frequency device 320 of any one of the preceding embodiments, wherein the middle frame 310 is grounded, and a first ground feed point 321 and a second ground feed point 322 of the radio frequency device 320 are respectively connected to the middle frame 310 to realize grounding of the first ground feed point 321 and the second ground feed point 322.

For some embodiments, the electronic device 300 may be a mobile phone or smart phone, a portable gaming device, a laptop, a PDA, a portable internet appliance, a music player, and data storage device, other handheld devices, and devices such as a watch, a headset, a pendant, an earpiece, etc., and the electronic device 300 may also be other wearable devices (e.g., a Head Mounted Device (HMD) such as electronic glasses, electronic clothing, an electronic bracelet, an electronic necklace, an electronic tattoo, a smart watch).

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims

1. A radio frequency device, comprising: the frequency-selective feed circuit comprises a first branch, a second branch, a first feed point, a second feed point, a first feed source, a second feed source, a first frequency-selective circuit and a second frequency-selective circuit;

gaps are formed between the first branches and the second branches;

the first feeding point and the first feeding point are respectively arranged on the first branch knot, and the second feeding point are respectively arranged on the second branch knot;

the first frequency selection circuit is a low-resistance high-pass circuit, one end of the first frequency selection circuit is connected with the first feed point, the other end of the first frequency selection circuit is grounded, the first frequency selection circuit is used for enabling the first stub to generate a first parasitic resonance based on a signal coupled by the first stub, and the passband frequency of the low-resistance high-pass circuit is related to the frequency of the signal coupled by the first stub;

the second frequency-selecting circuit is a low-resistance high-pass circuit, one end of the second frequency-selecting circuit is connected with the second feed point, the other end of the second frequency-selecting circuit is grounded, the second frequency-selecting circuit is used for enabling the second stub to generate second parasitic resonance based on a signal coupled by the second stub, and the stop-band frequency of the low-resistance high-pass circuit is related to the frequency of the signal coupled by the second stub.

2. The radio frequency device according to claim 1, wherein the second frequency selecting circuit comprises: a first inductor and a first capacitor;

one end of the first inductor is connected with the second feeding point, and the other end of the first inductor is grounded;

one end of the first capacitor is connected with the second feeding point, and the other end of the first capacitor is grounded.

3. The radio frequency device according to claim 2, wherein the second frequency selecting circuit further comprises: a second inductor;

one end of the second inductor is connected with the other end of the first inductor, and the other end of the second inductor is grounded;

the first inductor, the first capacitor and the second inductor form a low-resistance high-pass circuit.

4. The radio frequency device according to claim 3, wherein the second frequency selecting circuit further comprises: a switch;

when the switch is turned on, the second frequency selection circuit generates the second parasitic resonance.

5. The radio frequency device according to claim 1, wherein the first frequency selecting circuit comprises: a third inductor and a second capacitor;

one end of the third inductor is connected with the first feeding point, and the other end of the third inductor is grounded;

one end of the second capacitor is connected with the first feeding point, and the other end of the second capacitor is grounded.

6. The radio frequency device according to claim 5, wherein the first frequency selecting circuit further comprises: a fourth inductor;

one end of the fourth inductor is connected with the other end of the third inductor, and the other end of the fourth inductor is grounded;

the third inductor, the second capacitor and the fourth inductor form a low-resistance high-pass circuit.

7. The radio frequency device according to claim 1, further comprising: a fifth inductor, a third capacitor, a fourth capacitor, a fifth capacitor and a sixth capacitor;

one end of the fifth inductor is connected with the second feeding point, the other end of the fifth inductor is connected with one end of the third capacitor, the other end of the third capacitor is connected with one end of the fourth capacitor, the other end of the fourth capacitor is connected with the second feeding source, one end of the fifth capacitor is connected with the other end of the third capacitor, the other end of the fifth capacitor is grounded, one end of the sixth capacitor is connected with the other end of the fourth capacitor, and the other end of the sixth capacitor is grounded.

8. The radio frequency device according to claim 1, further comprising: a seventh capacitor, a sixth inductor and a seventh inductor;

one end of the seventh capacitor is connected to the first feeding point, the other end of the seventh capacitor is connected to the sixth inductor, the other end of the sixth inductor is connected to the first feeding source, one end of the seventh inductor is connected to the other end of the sixth inductor, and the other end of the seventh inductor is grounded.

9. The RF device of claim 1, 3 or 6, wherein the low impedance high pass circuit is a stop band in the L5 band and a band pass in the B1 band or above.

10. The radio frequency device according to claim 1, wherein the first operating signal generated by the first feeding source includes at least one of B1, N40, N41 and N78 frequency bands, and the fourth operating signal corresponding to the second parasitic resonance includes at least one of B1, 40, 41, N41 and N78 frequency bands;

the third working signal generated by the second feeding source comprises an L5 frequency band, and the second working signal corresponding to the first parasitic resonance comprises an L5 frequency band.

11. An electronic device, characterized in that the electronic device comprises: a middle frame and a radio frequency device according to any of claims 1-10, the middle frame being grounded, the first feed point and the second feed point of the radio frequency device being connected to the middle frame, respectively.