Combiner, radio frequency system and electronic equipment

Abstract

The utility model relates to a combiner, a radio frequency system and electronic equipment, the combiner is provided with a common port, a first port and a second port, the combiner comprises a first resonance band elimination circuit, the first end of the first resonance band elimination circuit is connected with the first port, and the first resonance band elimination circuit is used for inhibiting a first radio frequency signal and allowing signals except the first radio frequency signal to pass through; the first end of the second resonance band elimination circuit is connected with the second port, and the second resonance band elimination circuit is used for suppressing the second radio frequency signal and allowing signals except the second radio frequency signal to pass through; the first end of the electrostatic protection circuit is connected with the second end of the first resonance band elimination circuit, the second end of the second resonance band elimination circuit and the common port, the second end of the electrostatic protection circuit is connected with the reference ground end, and a plurality of discrete capacitors and inductors can be adopted. Hardware cost of the combiner can be greatly reduced, and reliability and safety of the combiner can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of antennas, in particular to a combiner, a radio frequency system and an electronic device. BACKGROUND

[0002] With the development of technology, the popularity of communication devices (for example, mobile phones, tablets, etc.) with communication functions is increasingly high, and the functions are increasingly powerful, for example, the communication application range of multiple frequency band carrier aggregation (CA) is increasingly wide.

[0003] However, the multi-band CA combination requirement needs to be reasonably processed by the combiner, and generally the combiner adopts a low temperature co-fired ceramic (LTCC) combiner made of an LTCC process, which has a high cost. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a combiner, a radio frequency system and an electronic device, which are low in cost, small in space occupation and beneficial to product miniaturization design.

[0005] In a first aspect, the embodiments of the present application provide a combiner, which is configured with a common port, a first port and a second port, and comprises:

[0006] a first resonant band rejection circuit, a first end of the first resonant band rejection circuit being connected with the first port, for suppressing a first radio frequency signal and allowing signals other than the first radio frequency signal to pass through;

[0007] a second resonant band rejection circuit, a first end of the second resonant band rejection circuit being connected with the second port, for suppressing a second radio frequency signal and allowing signals other than the second radio frequency signal to pass through;

[0008] an electrostatic protection circuit, a first end of the electrostatic protection circuit being connected with a second end of the first resonant band rejection circuit, a second end of the second resonant band rejection circuit and the common port respectively, and a second end of the electrostatic protection circuit being connected with a reference ground end.

[0009] In a second aspect, the embodiments of the present application provide a radio frequency system, comprising:

[0010] an antenna;

[0011] a first radio frequency circuit, for supporting the second radio frequency signal;

[0012] a second radio frequency circuit, for supporting the first radio frequency signal;

[0013] The combiner of the preceding, the first port of the combiner is connected with the first radio frequency circuit, the second port of the combiner is connected with the second radio frequency circuit, and the common port of the combiner is connected with the antenna.

[0014] In a third aspect, the embodiments of the present application provide an electronic device, comprising the radio frequency system of the preceding.

[0015] The combiner, the radio frequency system and the electronic device, wherein the combiner is configured with a common port, a first port and a second port, the combiner comprises a first resonant band-stop circuit, a second resonant band-stop circuit and an electrostatic protection circuit, the first resonant band-stop circuit is connected with the first port, the second resonant band-stop circuit is connected with the second port, and the first end of the electrostatic protection circuit is connected with the first resonant band-stop circuit, the second resonant band-stop circuit and the common port respectively, and the second end of the electrostatic protection circuit is connected to a reference ground end. The first resonant band-stop circuit can inhibit the first radio frequency signal and allow the second radio frequency signal to pass through, and the second resonant band-stop circuit can inhibit the second radio frequency signal and allow the first radio frequency signal to pass through. Compared with the traditional LTCC combiner, the combiner in the embodiments of the present application comprises the discrete first resonant band-stop circuit, the second resonant band-stop circuit and the electrostatic protection circuit, which can reduce the cost. In addition, by arranging the electrostatic protection circuit, the electrostatic energy in the combiner can be discharged to the common ground end, the combiner has the electrostatic protection function, and the reliability and safety of the combiner can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0017] Figure 1 It is a structural framework schematic diagram of the combiner in one embodiment;

[0018] Figure 2 It is a structural framework schematic diagram of the combiner in one embodiment;

[0019] Figure 3 It is a structural framework schematic diagram of the combiner in one embodiment;

[0020] Figure 4 It is an S curve simulation diagram of the combiner in one embodiment;

[0021] Figure 5 It is an S curve simulation diagram of the combiner in another embodiment;

[0022] Figure 6 a schematic diagram of a structure framework of a radio frequency system in an embodiment;

[0023] Figure 7 a schematic diagram of a structure framework of a radio frequency system in another embodiment;

[0024] Figure 8 a schematic diagram of a combiner of a radio frequency system in an embodiment. DETAILED DESCRIPTION

[0025] In order to make the above objectives, features and advantages of the present application more clear and easily understood, the specific embodiments of the present application will be described in detail below with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways from those described herein without departing from the scope of the present application and it is understood that variations can be made in view of the above teachings.

[0026] In the description of the present application, it should be understood that the terms "first", "second" are used only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0027] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for the purpose of illustration only, and do not represent the only implementation.

[0029] The combiner related to the embodiments of the present application can be applied to an electronic device with a wireless communication function. The electronic device can be a handheld device, a vehicle-mounted device, a wearable device, a computing device, or other processing devices connected to a wireless modem, and various forms of user equipment (UE) (for example, a mobile phone), a mobile station (MS), and the like. For the convenience of description, the above-mentioned devices are collectively referred to as electronic devices.

[0030] For the convenience of description, the electronic device is taken as a mobile phone for example. The mobile phone usually supports multiple frequency bands of positioning systems, mobile cellular networks, WLAN wireless local area networks, and the like. The positioning systems can include a global navigation satellite system (GNSS), a global positioning system (GPS), a Bei Dou satellite navigation system (BDS), a GLONASS satellite navigation system (GLONASS), or a Galileo satellite navigation system (GALILEO), and the like. Due to the limitations of volume, performance, and the like, the mobile phone terminal usually sets one antenna to support two or more frequency bands of radio frequency signals. Generally, a combiner is arranged in the radio frequency architecture of the mobile phone to connect multiple frequency bands (for example, GPS L5 frequency band and cellular Wi-Fi 2.4G frequency band) with similar frequency ranges to the same antenna through corresponding radio frequency paths, so as to realize the simultaneous work of two frequency bands on the same antenna without affecting each other.

[0031] In the related art, the GPS L5 frequency band and the cellular Wi-Fi 2.4G frequency band are connected to the same antenna through two radio frequency paths in the radio frequency architecture by arranging an LTCC frequency divider. However, the LTCC frequency divider (or combiner) has high integration, but high material cost. Based on this, the embodiments of the present application provide a combiner which can adopt a discrete combiner. The discrete combiner can reduce the cost, and has an electrostatic protection function, so as to improve the safety and reliability of the combiner.

[0032] As Figure 1As shown, the embodiment of the present application provides a combiner. The combiner 10 is configured with a common port Port1, a first port Port2 and a second port Port3. Exemplarily, the first port Port2 and the second port Port3 can be used as input terminals of the combiner 10 respectively, and be connected with radio frequency devices respectively, and the common port Port1 can be connected with an antenna, and the combiner 10 can perform combing processing on a first signal received by the first port Port2 and a second signal received by the second port Port3, and then output to the antenna through the common port Port1. Alternatively, the first port Port2 and the second port Port3 can be used as output terminals of the combiner 10 respectively, and be connected with radio frequency devices respectively, and the common port Port1 can be connected with an antenna. Wherein, the combiner 10 can be used for performing frequency division processing on an electromagnetic wave signal received by the common port Port1 from the antenna, to output a first signal through the first port Port2 and a second signal through the second port Port3 respectively. It should be noted that the frequency ranges of the first signal and the second signal are not completely the same, so as to realize the combing or frequency division processing on the radio frequency signals of multiple frequency bands.

[0033] The combiner 10 includes a first resonant band elimination circuit 110, a second resonant band elimination circuit 120 and an electrostatic protection circuit 130. The first end of the first resonant band elimination circuit 110 is connected with the first port Port2, the first end of the second resonant band elimination circuit 120 is connected with the second port Port3, and the first end of the electrostatic protection circuit 130 is connected with the first resonant band elimination circuit 110, the second resonant band elimination circuit 120 and the common port Port1 respectively, and the second end of the electrostatic protection circuit 130 is connected with a reference ground.

[0034] The first resonant band elimination circuit 110 is used for suppressing the first radio frequency signal and allowing signals other than the first radio frequency signal (for example, at least including the second radio frequency signal) to pass through.

[0035] The second resonant band elimination circuit 120 is used for suppressing the second radio frequency signal and allowing signals other than the second radio frequency signal (for example, at least including the first radio frequency signal) to pass through.

[0036] In the embodiment of the present application, the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 can respectively include a plurality of discrete lumped elements. The lumped elements can include capacitance, inductance or resistance. The plurality of discrete lumped elements can be connected in series, in parallel or in series-parallel. The resonant frequency of each resonant band elimination circuit is related to the element parameters (for example, inductance value, capacitance value, resistance value) of the included lumped elements. Each resonant band elimination circuit can suppress or prevent the target radio frequency signal with the resonant frequency from passing through, and can allow the radio frequency signals other than the target radio frequency signal to pass through.

[0037] In the embodiments of the present application, the first radio frequency signal and the second radio frequency signal can be positioning system signals, mobile cellular signals or WLAN wireless local area signals (for example, WiFi 2.4G band signals, WiFi 5G band signals), etc. The mobile cellular signals include but are not limited to low, medium, high frequency signals of LTE 4G, and low, medium, high and ultra-high frequency signals of NR 5G, etc. In the embodiments of the present application, for the convenience of description, the first radio frequency signal is taken as a WiFi 2.4G signal, and the second radio frequency signal is taken as a GPS L5 signal as an example for description.

[0038] By setting the element parameters (for example, inductance value, capacitance value) of each lumped element in the first resonant band elimination circuit 110, the resonant frequency of the first resonant band elimination circuit 110 can be defined, so that the resonant frequency falls within the frequency range of the first radio frequency signal. For example, if the resonant frequency of the first resonant band elimination circuit 110 is 2.45GHz, it can correspond to suppress 2.4-2.5GHz Wi-Fi frequency signals, but it can allow signals other than 2.4-2.5GHz Wi-Fi frequency signals to pass. If the resonant frequency of the second resonant band elimination circuit 120 is 1.16GHz, it can correspond to suppress GPS L5 frequency signals, but it can allow signals other than GPS L5 frequency signals to pass. It should be noted that even if the first radio frequency signal is a WiFi 2.4G signal and the second radio frequency signal is a GPS L5 signal, the resonant frequencies of the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 are not limited to the above example.

[0039] The electrostatic protection circuit 130 can discharge the electrostatic energy of the combiner 10 to the reference ground, which has an electrostatic protection function. For example, the electrostatic protection circuit 130 can include at least one inductor device, by reasonably setting the inductance value of the inductor device, the electrostatic energy of the combiner 10 can be discharged to the reference ground to realize the electrostatic protection function.

[0040] In the embodiment of the present application, the combiner 10 includes a first resonant band elimination circuit 110, a second resonant band elimination circuit 120 and an electrostatic protection circuit 130. The first resonant band elimination circuit 110 is connected with the first port Port2, the second resonant band elimination circuit 120 is connected with the second port Port3, and the first end of the electrostatic protection circuit 130 is connected with the first resonant band elimination circuit 110, the second resonant band elimination circuit 120 and the common port Port1 respectively, and the second end of the electrostatic protection circuit 130 is connected with the reference ground. The first resonant band elimination circuit 110 can inhibit the first radio frequency signal and allow the second radio frequency signal to pass through, and the second resonant band elimination circuit 120 can inhibit the second radio frequency signal and allow the first radio frequency signal to pass through. Compared with the traditional LTCC combiner 10, the combiner 10 in the embodiment of the present application includes the discrete first resonant band elimination circuit 110, the second resonant band elimination circuit 120 and the electrostatic protection circuit 130, which can reduce the cost. In addition, by arranging the electrostatic protection circuit 130, the electrostatic energy in the combiner 10 can be discharged to the common ground, which has the electrostatic protection function and can improve the reliability and safety of the combiner 10.

[0041] In an exemplary embodiment, the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 can be band elimination filter circuits. The center frequencies of the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 are different, and the bandwidths can be the same or different. The first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 can be a kind of band elimination filter circuit which allows signals outside a certain frequency range to pass through and inhibits signals within the frequency range. The center frequency refers to the center of the “band elimination” range, and the bandwidth refers to the width of the “band elimination” range. The center frequencies and the bandwidths of the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 can be set according to the first radio frequency signal and the second radio frequency signal.

[0042] As shown in FIG. 1, Figure 2 The first resonant band elimination circuit 110 includes a first LC band elimination filter branch 111. The first end of the first LC band elimination filter branch 111 is connected with the first port Port2 of the combiner 10, and the second end of the first LC band elimination filter branch 111 is connected with the common port Port1 and the first end of the electrostatic protection circuit 130 respectively. The second resonant band elimination circuit 120 includes a second LC band elimination filter branch 121. The first end of the second LC band elimination filter branch 121 is connected with the second port Port3 of the combiner 10, and the second end of the second LC band elimination filter branch 121 is connected with the common port Port1 and the first end of the electrostatic protection circuit 130 respectively.

[0043] In the embodiment of the present application, the first LC band elimination filter branch 111 and the second LC band elimination filter branch 121 can be LC resonant band elimination filter branches.

[0044] The number of first LC band-stop filter branches 111 can be one or more. If the first resonant band-stop circuit 110 includes multiple first LC band-stop filter branches 111, the multiple first LC band-stop filter branches 111 are connected in parallel. In the embodiment of the present application, by providing the LC band-stop filter branches as the band-stop filter circuit, it can suppress the first RF signal and allow signals other than the first RF signal to pass.

[0045] Accordingly, the number of second LC band-stop filter branches 121 can be one or more. If the second resonant band-stop circuit 120 includes multiple second LC band-stop filter branches 121, the multiple second LC band-stop filter branches 121 are connected in parallel. In the embodiment of the present application, by providing the LC band-stop filter branch as a band-stop filter circuit, it can suppress the second RF signal and allow signals other than the second RF signal to pass.

[0046] Optionally, the first resonant band-stop circuit 110 and the second resonant band-stop circuit 120 may each comprise an RC band-stop filter branch. For example, the RC band-stop filter branch may comprise a resistor and a capacitor connected in series. It should be noted that in the embodiments of the present application, the specific circuit configurations of the first resonant band-stop circuit 110 and the second resonant band-stop circuit 120 are not limited.

[0047] like Figure 3 As shown, in an exemplary embodiment, the first LC band-stop filter branch 111 includes a first inductor L1 and a first capacitor C1. The first end of the first inductor L1 is respectively connected to the first end of the first capacitor C1 and the first port Port2 of the combiner 10; the second end of the first inductor L1 is respectively connected to the second end of the first capacitor C1 and the first end of the electrostatic protection circuit 130. The first LC band-stop filter branch 111 can be understood as a low-pass channel that allows low-frequency signals to pass through and suppresses high-frequency signals. Exemplarily, the LC resonant band-stop filter formed by the first inductor L1 and the first capacitor C1 can be a 2.4 GHz band-stop filter, allowing GPS L1 frequency signals (1.166-1.228 GHz) to pass while suppressing 2.4-2.5 GHz Wi-Fi frequency signals.

[0048] The second LC band-stop filter branch 121 includes a second inductor L2 and a second capacitor C2. The first end of the second inductor L2 is connected to the first end of the second capacitor C2 and the second port Port3 of the combiner 10 respectively. The second end of the second inductor L2 is connected to the second end of the second capacitor C2 and the first end of the electrostatic protection circuit 130 respectively. The second LC band-stop filter branch 121 can be understood as a high-pass channel, which allows high-frequency signals to pass through and suppresses low-frequency signals. For example, the LC resonant band-stop filter composed of the second inductor L2 and the second capacitor C2 can be a 1.1 GHz band-stop filter, which allows Wi-Fi 2.4G (2.4-2.485 GHz) frequency signals to pass through and suppresses GPS L5 frequency signals.

[0049] In the embodiment, a capacitor and an inductor are used as the resonant band-stop circuit, the band-stop filter function can be realized by using the least number of lumped elements, the cost of the combiner 10 can be further reduced, and in addition, the structure of the combiner 10 can be simplified, which is beneficial to the miniaturization of the combiner 10.

[0050] Optionally, the first LC band-stop filter branch 111 can further include a plurality of first inductors L1 connected in parallel. Optionally, the first LC band-stop filter branch 111 can further include a plurality of first capacitors C1 connected in parallel. Optionally, the first LC band-stop filter branch 111 can further include a plurality of first capacitors C1 connected in parallel and a plurality of first inductors L1 connected in parallel.

[0051] Optionally, the second LC band-stop filter branch 121 can further include a plurality of second inductors L2 connected in parallel. Optionally, the second LC band-stop filter branch 121 can further include a plurality of second capacitors C2 connected in parallel. Optionally, the second LC band-stop filter branch 121 can further include a plurality of second capacitors C2 connected in parallel and a plurality of second inductors L2 connected in parallel.

[0052] In an exemplary embodiment, each lumped element (for example, the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2) of the first resonant band-stop circuit 110 and the second resonant band-stop circuit 120 is a 0201 size package patch element. The height of the capacitor or inductor with 0201 size package is about 0.3 mm.

[0053] The height of the LTCC frequency divider in the related art is usually greater than 0.6 mm. Therefore, the height of the capacitor or inductor in the 0201 size package is half of the height of the LTCC frequency divider. Generally, in the process of using the shield cover, it is required that the height of the inner wall of the shield cover from the circuit board PCB is not greater than 1.4 mm, and the height of the LTCC frequency divider is usually greater than 0.6 mm, which may cause the frequency offset or resonance phenomenon of the LTCC frequency divider and the top layer of the shield cover to be coupled, and the performance of the frequency divider is affected. If the LTCC frequency divider is not placed in the shield cover but is laid out in the unshielded area of the PCB, there may be a risk of being disturbed by other module circuits without effective shielding.

[0054] The combiner 10 provided in the embodiment of the present application adopts the capacitor or inductor in the 0201 size package with a height of about 0.3 mm, which is almost not affected by the height when it is accommodated in the shield cover, avoids the frequency offset and resonance phenomenon caused by placing the LTCC frequency divider in the shield cover with insufficient height, and can improve the performance of the combiner 10. In addition, the combiner 10 in the embodiment of the present application adopts the lumped element design in the 0201 size package, which can greatly reduce the cost of the filter circuit. Compared with the LTCC frequency divider in the related art in the 1608 size package, the area occupied by the combiner 10 can be reduced by 28%, so that the flexibility of the circuit layout can be improved, and the miniaturization design of the combiner 10 is facilitated.

[0055] Optionally, each lumped element (for example, the first capacitor C1, the second capacitor C2, the first inductor L1 and the second inductor L2) of the first resonant band elimination circuit 110 and the second resonant band elimination circuit 120 is a 01005 size package patch element. The size of the 01005 size package patch element is smaller than that of the 0201 size package patch element. Therefore, the circuit area occupied by the combiner 10 can be further reduced, and the flexibility of the circuit layout and the miniaturization design of the combiner 10 are more facilitated.

[0056] Please continue to refer to Figure 2 and 3 In an exemplary embodiment, the electrostatic protection circuit 130 includes a third inductor L3. The first end of the third inductor L3 is the first end of the electrostatic protection circuit 130, and the second end of the third inductor L3 is the second end of the electrostatic protection circuit 130.

[0057] In the embodiment, the smaller the inductor of the third inductor L3 is, the better the electrostatic protection function is, and the electrostatic energy is concentrated within 500M. Generally, the smaller the inductance value of the third inductor L3 is, the lower the impedance to the low-frequency signal (for example, the GPS L5 frequency band signal) is, and the electrostatic energy can be directly discharged to the reference ground end through the third inductor L3 to achieve the electrostatic protection function.

[0058] Please continue to refer toFigure 3 In an exemplary embodiment, the combiner 10 further comprises a fourth inductor L4, wherein a first end of the fourth inductor L4 is connected to the second end of the first resonant band-stop circuit 110 and the second end of the second resonant band-stop circuit 120 respectively, and a second end of the fourth inductor L4 is connected to the first end of the third inductor L3 and the common port Port1 respectively.

[0059] The third inductor L3 and the fourth inductor L4 can constitute an impedance matching circuit of the combiner 10, which can be used to adjust or improve the impedance characteristics of the first resonant band-stop circuit 110 (e.g., a Wi-Fi 2.4G band-stop filter) and the second resonant band-stop circuit 120 (e.g., a GPS L5 band-stop filter) after being connected and combined, and improve the in-band reflection characteristics of each port (e.g., the first port Port2, the second port Port3, and the common port Port1).

[0060] The smaller the value of the third inductor L3 is, the stronger the corresponding electrostatic protection capability is. However, if the inductance value of the third inductor L3 is too small, it will cause the attenuation of the radio frequency signal. In the embodiment of the present application, the inductance value of the third inductor L3 ranges from 10nH to 20nH, for example, 10nH, 11nH, 12nH, 13nH, 14nH, 15nH, 16nH, 17nH, 18nH, 19nH, or 20nH.

[0061] Optionally, the third inductor L3 and the fourth inductor L4 in the combiner 10 can also be 0201 size package patch elements or 01005 size package patch elements.

[0062] In the embodiment, the impedance matching circuit and the electrostatic protection circuit 130 can reuse the third inductor L3, which can avoid additional setting of the electrostatic protection structure, and can further simplify the structure design and cost of the combiner 10. In addition, by reasonably setting the inductance value of the third inductor L3, the electrostatic protection function, the impedance characteristics, and the in-band reflection characteristics can be balanced to improve the combining performance of the combiner 10.

[0063] In an exemplary embodiment, each inductor included in the combiner 10 in the embodiment of the present application can also be a microstrip inductor. In the embodiment of the present application, each inductor in the combiner 10 can adopt a microstrip inductor, which has the same performance as a patch inductor and belongs to normal wiring. Compared with the patch inductor, the microstrip inductor can further reduce the cost, and has more advantages in power capacity, heat dissipation, and coupling.

[0064] Optionally, each inductor included in the combiner 10 in the embodiment of the present application can also be a binding wire inductor, and the binding wire can be selected from gold wire, aluminum wire, or copper wire, which can reduce the insertion loss of the combiner 10.

[0065] Figure 4This is a schematic diagram of S parameters between different ports of the combiner 10 provided in an embodiment of the present application. Figure 5 Schematic diagram of S parameters of different ports of the combiner 10 provided in an embodiment of the present application, Figure 4 and Figure 5 The performance indicators of the low-pass filter branch and the high-pass filter branch of the discrete combiner 10 of the present application can be displayed, wherein the performance indicators may include an insertion loss indicator, an isolation indicator, and a return loss indicator.

[0066] like Figure 4 and Figure 5 As shown, the first resonant band-stop circuit 110 (e.g., a low-pass path) of the discrete combiner 10 has an insertion loss of less than 0.5dB in the 1.166-1.228GHz passband frequency range and a rejection of greater than 20dB in the WiFi 2.4G (2.4-2.5GHz) stopband frequency range. The second resonant band-stop circuit 120 (e.g., a WiFi 2.4G high-pass path) of the discrete combiner 10 has an insertion loss of less than 0.4dB in the 2.4-2.5GHz passband and a rejection of greater than 20dB in the GPS L5 (1.166-1.228GHz) frequency range. Furthermore, the isolation between the first resonant band-stop circuit 110 and the second resonant band-stop circuit 120 of the combiner 10 is greater than 15dB in the 1.166-1.228GHz and 2.4-2.5GHz frequency ranges, meeting terminal performance requirements. It can be seen that compared with the LTCC frequency divider in the related art, the present application has the advantages of low cost, not being easily affected by the shielding cover, and having a flexible structure.

[0067] like Figure 6 As shown, an embodiment of the present application further provides a radio frequency system, which may include an antenna ANT, a first radio frequency circuit 20, a second radio frequency circuit 30, and the combiner 10 in any of the aforementioned embodiments.

[0068] The first RF circuit 20 is configured to support the second RF signal. The first RF circuit 20 may include a RF front-end module that supports the second RF signal, thereby supporting transmission processing of the second RF signal, receiving processing of the second RF signal, or transmitting processing of the second RF signal. The RF front-end module includes, but is not limited to, a transceiver, a baseband processor, a power amplifier, a filter, a low-noise amplifier, and an RF switch.

[0069] The second radio frequency circuit 30 is configured to support the first radio frequency signal. The second radio frequency circuit 30 can also include a radio frequency front-end module configured to support the first radio frequency signal, to support the transmission of the second radio frequency signal, or to support the reception of the first radio frequency signal, or to support the transmission of the first radio frequency signal. The radio frequency front-end module includes, but is not limited to, a transceiver, a baseband processor, a power amplifier, a filter, a low-noise amplifier, a radio frequency switch, and the like. For example, if the first radio frequency signal is a WiFi 2.4G frequency band signal and the second radio frequency signal is a GPS L5 frequency band signal, the first radio frequency circuit 20 can include a GPS L5 front-end transceiver module circuit, and the second radio frequency circuit 30 can include a WiFi 2.4G front-end transceiver module circuit.

[0070] The first port Port2 of the combiner 10 is connected to the first radio frequency circuit 20, the second port Port3 of the combiner 10 is connected to the second radio frequency circuit 30, and the common port Port1 of the combiner 10 is connected to the antenna ANT.

[0071] In the embodiment, the first resonant band-stop circuit 110 of the combiner 10 can suppress the first radio frequency signal and allow the second radio frequency signal to pass through, the second resonant band-stop circuit 120 of the combiner 10 can suppress the second radio frequency signal and allow the first radio frequency signal to pass through, and the electrostatic protection circuit 130 can also achieve the electrostatic protection function. In addition, the second radio frequency signal output by the first resonant band-stop circuit 110 and the first radio frequency signal output by the second resonant band-stop circuit 120 can be transmitted to the antenna ANT through the common port Port1, and the combiner 10 can achieve the combination of the first radio frequency signal and the second radio frequency signal and the common antenna ANT setting, thereby ensuring the independent operation of the first radio frequency signal and the second radio frequency signal and the mutual independence of the first radio frequency signal and the second radio frequency signal, improving the communication performance and integration of the radio frequency system. In addition, compared with the traditional LTCC combiner 10, the combiner 10 in the embodiment includes the discrete first resonant band-stop circuit 110, the second resonant band-stop circuit 120, and the electrostatic protection circuit 130, which can reduce the cost. In addition, by arranging the electrostatic protection circuit 130, the electrostatic energy in the combiner 10 can be discharged to the common ground, and the combiner 10 has the electrostatic protection function, thereby improving the reliability and safety of the combiner 10.

[0072] In addition, by adjusting the parameter values of the capacitors and inductors in the first resonant band-stop circuit 110 and the second resonant band-stop circuit 120, the combiner 10 can be applied to various dual-path common antenna ANT radio frequency circuit scenarios, such as GNSS frequency band and cellular network frequency band, or GNSS frequency point signal and Wi-Fi 2.4G frequency band common antenna ANT scenarios, thereby improving the expansibility of the radio frequency system.

[0073] As shown in FIG. 1, the first radio frequency circuit 20 and the second radio frequency circuit 30 are connected to the combiner 10, and the combiner 10 is connected to the antenna ANT. Figure 7As shown, in an exemplary embodiment, the RF system further includes: a first matching circuit 40, a second matching circuit 50, and a third matching circuit 60. The first end of the first matching circuit 40 is connected to the first RF circuit 20, and the second end of the first matching circuit 40 is connected to the first port Port2 of the combiner 10. The first end of the second matching circuit 50 is connected to the second RF circuit 30, and the second end of the second matching circuit 50 is connected to the second port Port3 of the combiner 10. The first end of the third matching circuit 60 is connected to the common port Port1 of the combiner 10, and the second end of the third matching circuit 60 is connected to the antenna ANT.

[0074] The first matching circuit 40, the second matching circuit 50, and the third matching circuit 60 may each include multiple lumped elements. The lumped elements in each matching circuit may include capacitive elements or inductive elements. In the embodiments of the present application, each matching circuit may include multiple lumped elements, and the types of the multiple lumped elements may be the same or different. The multiple lumped elements may be connected in series, in parallel, or in series-parallel.

[0075] In this embodiment, the RF circuit further includes matching circuits provided at the input and output ends of the combiner 10 , which can improve the impedance characteristics of the input and output sides of the combiner 10 , thereby further improving the communication performance of the RF system.

[0076] like Figure 8 As shown, in an exemplary embodiment, the combiner 10 further includes a packaging structure 101, which is provided with a first channel A1, a second channel A2, and a third channel A3, wherein the third channel A3 is connected to the first channel A1 and the second channel A2, respectively. A first resonant band-stop circuit 110 is housed in the first channel A1; a second resonant band-stop circuit 120 is housed in the second channel A2; and an electrostatic protection circuit 130 is housed in the third channel A3.

[0077] Optionally, the first capacitor C1 and the first inductor L1 are accommodated in the first channel A1, the second capacitor C2 and the second inductor L2 are accommodated in the second channel A2; the third inductor L3 and the fourth inductor L4 are accommodated in the third channel A3.

[0078] Optionally, in the embodiment, since the combiner 10 has a simple structure, the package structure 101 also has a remaining space to accommodate part of the lumped elements of the first matching circuit 40 and part of the lumped elements of the second matching circuit 50. For example, part of the lumped elements of the first matching circuit 40 are accommodated in the first channel A1, and part of the lumped elements of the second matching circuit 50 are accommodated in the second channel A2. In this way, by arranging part of the lumped elements in the first matching circuit 40 and the second matching circuit 50 in the channels of the combiner 10, the integration between the combiner 10 and the first matching circuit 40 and the second matching circuit 50 in the radio frequency system can be further provided, which is beneficial to the layout flexibility of the radio frequencies in the radio frequency system and the miniaturization of the radio frequency system.

[0079] In an exemplary embodiment, part of the lumped elements of the first matching circuit 40 include capacitive elements, and part of the lumped elements of the second matching circuit 50 include capacitive elements and inductive elements. For example, referring to FIG. 3, M3 is a capacitor, M4 is an inductor, and M5 is a capacitor. By arranging the corresponding matching circuit, a low-pass filter function can also be realized to increase the out-of-band rejection performance of the first resonant band-stop circuit 110 (for example, the WiFi 2.4G high-frequency channel). Figure 8

[0080] The embodiments of the present application also provide an electronic device, which can include the radio frequency system in any of the foregoing embodiments. The combiner in the radio frequency system can adopt the combiner in any of the foregoing embodiments, and the implementation principle and technical effects are similar, which will not be described here.

[0081] The above embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.​

Claims

1. A combiner, characterized by The combiner is configured with a common port, a first port and a second port, wherein the combiner comprises: a first resonant band elimination circuit, a first end of the first resonant band elimination circuit being connected with the first port, for suppressing a first radio frequency signal and allowing signals other than the first radio frequency signal to pass; a second resonant band elimination circuit, a first end of the second resonant band elimination circuit being connected with the second port, for suppressing a second radio frequency signal and allowing signals other than the second radio frequency signal to pass; an electrostatic protection circuit, a first end of the electrostatic protection circuit being connected with a second end of the first resonant band elimination circuit, a second end of the second resonant band elimination circuit and the common port respectively, a second end of the electrostatic protection circuit being connected with a reference ground end.

2. The combiner of claim 1, wherein, The first resonant band elimination circuit comprises: a first LC band elimination filter branch, a first end of the first LC band elimination filter branch being connected with the first port of the combiner, a second end of the first LC band elimination filter branch being connected with the common port and the first end of the electrostatic protection circuit respectively; The second resonant band elimination circuit comprises: a second LC band elimination filter branch, a first end of the second LC band elimination filter branch being connected with the second port of the combiner, a second end of the second LC band elimination filter branch being connected with the common port and the first end of the electrostatic protection circuit respectively.

3. The combiner of claim 2, wherein, The first LC band elimination filter branch comprises a first inductor and a first capacitor; wherein, a first end of the first inductor is connected with a first end of the first capacitor and the first port of the combiner respectively; a second end of the first inductor is connected with a second end of the first capacitor and the first end of the electrostatic protection circuit respectively.

4. The combiner of claim 2, wherein, The second LC band elimination filter branch comprises a second inductor and a second capacitor; wherein, a first end of the second inductor is connected with a first end of the second capacitor and the second port of the combiner respectively; a second end of the second inductor is connected with a second end of the second capacitor and the first end of the electrostatic protection circuit respectively.

5. The combiner of claim 1, wherein, The electrostatic protection circuit comprises a third inductor; wherein, a first end of the third inductor is the first end of the electrostatic protection circuit, a second end of the third inductor is the second end of the electrostatic protection circuit.

6. The combiner of claim 5, wherein, An inductance value of the third inductor is 10nH-20nH.

7. The combiner of claim 5, wherein, The combiner further comprises a fourth inductor, wherein a first end of the fourth inductor is connected with the second end of the first resonant band elimination circuit and the second end of the second resonant band elimination circuit respectively, a second end of the fourth inductor is connected with the first end of the third inductor and the common port respectively.

8. The combiner of claim 1, wherein, The lumped elements comprised in the first resonant band elimination circuit, the second resonant band elimination circuit and the electrostatic protection circuit are 0201 size package patch elements or 01005 size package patch elements respectively.

9. The combiner of claim 1, wherein, The first radio frequency signal is a WiFi 2.4G signal, and the second radio frequency signal is a GPS L5 frequency band signal.

10. A radio frequency system, characterized by comprise: an antenna; a first radio frequency circuit, configured to support the second radio frequency signal; a second radio frequency circuit, configured to support the first radio frequency signal; The combiner of any one of claims 1-9, a first port of the combiner is connected with the first radio frequency circuit, a second port of the combiner is connected with the second radio frequency circuit, and a common port of the combiner is connected with the antenna.

11. The radio frequency system of claim 10, wherein, The radio frequency system further comprises: a first matching circuit, a first end of the first matching circuit is connected with the first radio frequency circuit, and a second end of the first matching circuit is connected with the first port of the combiner; a second matching circuit, a first end of the second matching circuit is connected with the second radio frequency circuit, and a second end of the second matching circuit is connected with the second port of the combiner a third matching circuit, a first end of the third matching circuit is connected with the common port of the combiner, and a second end of the third matching circuit is connected with the antenna.

12. The radio frequency system of claim 11, wherein, The combiner further comprises a packaging structure, the packaging structure is provided with a first channel, a second channel and a third channel, wherein the third channel is in communication with the first channel and the second channel respectively; wherein the first resonant band rejection circuit is accommodated in the first channel; the second resonant band rejection circuit is accommodated in the second channel; the electrostatic protection circuit is accommodated in the third channel; wherein part of lumped elements of the first matching circuit are accommodated in the first channel, and part of lumped elements of the second matching circuit are accommodated in the second channel.

13. The radio frequency system of claim 12, wherein, Part of lumped elements of the first matching circuit comprises a capacitive element; Part of lumped elements of the second matching circuit comprises a capacitive element and an inductive element.

14. An electronic device, comprising: The radio frequency system of any one of claims 10-13. The radio frequency system of any one of claims 10-13.

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