WO2023147749A1 - 信号发射装置及射频前端模块、设备 - Google Patents

信号发射装置及射频前端模块、设备 Download PDF

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WO2023147749A1
WO2023147749A1 PCT/CN2022/142707 CN2022142707W WO2023147749A1 WO 2023147749 A1 WO2023147749 A1 WO 2023147749A1 CN 2022142707 W CN2022142707 W CN 2022142707W WO 2023147749 A1 WO2023147749 A1 WO 2023147749A1
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signal
transmitted
frequency band
combiner
input
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PCT/CN2022/142707
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English (en)
French (fr)
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卓建政
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Oppo广东移动通信有限公司
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Publication of WO2023147749A1 publication Critical patent/WO2023147749A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/005Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges
    • H04B1/0067Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission adapting radio receivers, transmitters andtransceivers for operation on two or more bands, i.e. frequency ranges with one or more circuit blocks in common for different bands
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B1/0475Circuits with means for limiting noise, interference or distortion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/02Transmitters
    • H04B1/04Circuits
    • H04B2001/0491Circuits with frequency synthesizers, frequency converters or modulators

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  • This application relates to communication technology, involving but not limited to signal transmitting devices, radio frequency front-end modules and equipment.
  • the signal transmitting device, radio frequency front-end module and equipment provided by the present application can reduce the number of antennas, thereby saving the occupied space of the device.
  • a signal transmitting device including: a first combiner, a second combiner, and an antenna; wherein the first combiner is used to combine the input first standby The transmitting signal is combined with the input second signal to be transmitted to obtain a first combined signal, and the first combined signal is output to the second combiner; the second combiner is used to combine the Combine the input third signal to be transmitted with the input first combined signal to obtain a second combined signal, and output the second combined signal to the antenna; the antenna is used to transmit the The second combining signal;
  • the three channels of signals to be transmitted share one antenna through two combiners, thereby reducing the number of antennas and saving the area of the signal transmitting device.
  • the input two-tone third-order intercept point (Input 3rd order intercept point, IIP3) of the first combiner is greater than the first threshold
  • the IIP3 of the second combiner is greater than the second threshold
  • a radio frequency front-end module is provided, including any signal transmitting device described in the embodiments of the present application.
  • an electronic device including any signal transmitting device described in the embodiments of the present application and a power module; wherein, the power module is configured to supply power to the signal transmitting device.
  • FIG. 1 is a schematic structural diagram of a signal transmitting device provided in an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of another signal transmitting device provided by an embodiment of the present application.
  • FIG. 3 is a schematic structural diagram of another signal transmitting device provided by an embodiment of the present application.
  • FIG. 4 is a schematic structural diagram of another signal transmitting device provided by an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of another signal transmitting device provided by an embodiment of the present application.
  • FIG. 6 is a schematic structural diagram of another signal transmitting device provided by an embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a radio frequency front-end module provided by an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present application.
  • connection in the embodiment of the present application refers to various electrical connection methods such as direct connection or indirect connection to realize the transmission of messages/signals, which is not limited in the embodiment of the present application.
  • Output in the embodiments of the present application refers to direct output or indirect output signals, which is not limited in this embodiment of the present application.
  • FIG. 1 is a schematic structural diagram of the signal transmitting device provided in the embodiment of the present application.
  • the signal transmitting device 10 at least includes: a first combiner 101, a second combiner router 102 and antenna 103; where,
  • the first combiner 101 is configured to combine the input first signal to be transmitted and the input second signal to be transmitted to obtain a first combined signal, and output the first combined signal to the second combiner 102;
  • the second combiner 102 is configured to combine the input third signal to be transmitted and the input first combined signal to obtain a second combined signal, and output the second combined signal to the antenna 103;
  • An antenna 103 configured to transmit the second combined signal
  • the IIP3 of the first combiner 101 is greater than the first threshold
  • the IIP3 of the second combiner 102 is greater than the second threshold, so that the interference of the intermodulation products generated after the signal is input to each combiner to the received signal meets the index Require.
  • IIP3 that is, the third-order input intermodulation point/input two-tone third-order intermodulation point
  • IIP3 is an index parameter that characterizes the linearity of a device, that is, an index parameter that characterizes the linearity of a combiner.
  • the size of the first threshold and the second threshold there is no limitation on the size of the first threshold and the second threshold.
  • the interference of the intermodulation products generated after each signal enters the combiner to the received signal meets the index requirement.
  • the magnitudes of the first threshold and the second threshold may be the same or different.
  • the frequency band corresponding to the first signal to be transmitted is the 5G Wi-Fi frequency band
  • the frequency band corresponding to the second signal to be transmitted is the N78 frequency band
  • the frequency band corresponding to the third signal to be transmitted is the 2.4G Wi-Fi frequency band. That is, the frequency point of the first signal to be transmitted belongs to the 5G Wi-Fi frequency band, the frequency point of the second signal to be transmitted belongs to the N78 frequency band, and the frequency point of the third signal to be transmitted belongs to the 2.4G Wi-Fi frequency band.
  • the antenna 103 transmits the first signal to be transmitted with a power of 26dBm (minimum value), and transmits the second signal to be transmitted and the third signal to be transmitted with a power of 17dBm (minimum value), then when the first combiner 101 and the second When the IIP3 of the combiner 102 is greater than 90, the third-order intermodulation product (IMD3) is lower than -108dBm, and lower than the noise floor of the Wi-Fi antenna port, that is, the interference to the received signal meets the index requirements, so the Wi-Fi There is no deterioration in reception sensitivity.
  • IMD3 third-order intermodulation product
  • the three signals to be transmitted are passed through two combiners (i.e. 101 and 102) to share one antenna 103; wherein, the IIP3 of the first combiner 101 is greater than the first threshold, and the second combiner The IIP3 of the device 102 is greater than the second threshold, so that the interference of the intermodulation products generated after the signal is input to each combiner on the received signal meets the index requirements, and then on the premise of meeting the communication performance, the number of antennas is reduced and the signal is saved.
  • FIG. 2 is a schematic structural diagram of another signal transmitting device provided in the embodiment of the present application.
  • the signal transmitting device 20 includes: a first combiner 101, a first Two combiners 102, antenna 103, first filter 201, second filter 202, first PAMiD 203, second PAMiD 204 and third PAMiD 205; wherein,
  • the first PAMiD 203 is used to output the fourth signal to be transmitted to the first filter 201;
  • the second PAMiD 204 is used to output the fifth signal to be transmitted to the second filter 202;
  • the third PAMiD 205 is used to output the second signal to be transmitted to the first combiner 101;
  • the first filter 201 is used to perform filtering processing on the input fourth signal to be transmitted to obtain the third signal to be transmitted; and is used to perform filtering processing on the input received signal to avoid the LNA generated in the PAMiD intermodulation interference;
  • the second filter 202 is used to filter the fifth input signal to be transmitted to obtain the first signal to be transmitted; and is used to filter the input received signal to avoid the LNA generated in the PAMiD Intermodulation interference.
  • PAMiD is an efficient module of an integrated duplexer, which integrates power amplifiers (PA), filters, and/or switches and even low-noise amplifiers (LNA), so that the RF front-end can be changed from a complex system design project in the past become simpler devices.
  • PA power amplifiers
  • LNA low-noise amplifiers
  • the signal Before the signal is input to the combiner, the signal is first input to the filter; in this way, on the one hand, for the received signal, the out-of-band received signal can be suppressed, so intermodulation interference does not occur in the LNA; on the other hand On the one hand, for the transmission signal, the out-of-band transmission signal can be filtered out, so the interference to the main frequency signal can be reduced, thereby improving the communication performance.
  • the first filter 201 and the second filter 202 are surface acoustic filters (SAW).
  • SAW surface acoustic filters
  • the frequency bands corresponding to/belonging to the first signal to be transmitted, the second signal to be transmitted, and the third signal to be transmitted there is no limitation on the frequency bands corresponding to/belonging to the first signal to be transmitted, the second signal to be transmitted, and the third signal to be transmitted.
  • the frequency point of the first signal to be transmitted, the frequency point of the second signal to be transmitted, and the frequency point of the third signal to be transmitted have a difference greater than the third Threshold; in this way, the mutual interference of various signals at the antenna end can be avoided or reduced.
  • the size of the third threshold as long as each signal does not interfere with each other at the antenna end or the degree of interference meets the index requirement.
  • the first signal to be transmitted belongs to the 5G Wi-Fi frequency band
  • the second signal to be transmitted belongs to the N78 frequency band
  • the third signal to be transmitted belongs to the 2.4G Wi-Fi frequency band.
  • Wi-Fi frequency band that is, the frequency band corresponding to the first signal to be transmitted is the 5G Wi-Fi frequency band
  • the frequency band corresponding to the second signal to be transmitted is the N78 frequency band
  • the frequency band corresponding to the third signal to be transmitted is 2.4G Wi-Fi frequency band.
  • the first signal to be transmitted belongs to the 5G Wi-Fi frequency band
  • the second signal to be transmitted belongs to the 2.4G Wi-Fi frequency band
  • the third signal to be transmitted belongs to the 2.4G Wi-Fi frequency band.
  • the signal belongs to the N78 frequency band; that is, the frequency band corresponding to the first signal to be transmitted is the 5G Wi-Fi frequency band, the frequency band corresponding to the second signal to be transmitted is the 2.4G Wi-Fi frequency band, and the third signal to be transmitted is The corresponding frequency band is the N78 frequency band.
  • the first signal to be transmitted belongs to the 2.4G Wi-Fi frequency band
  • the second signal to be transmitted belongs to the N78 frequency band
  • the third signal to be transmitted belongs to the 5G Wi-Fi frequency band.
  • Wi-Fi frequency band That is, the frequency band corresponding to the first signal to be transmitted is the 2.4G Wi-Fi frequency band
  • the frequency band corresponding to the second signal to be transmitted is the N78 frequency band
  • the frequency band corresponding to the third signal to be transmitted is the 5G Wi-Fi frequency band. band.
  • the signal to be transmitted belonging to the 2.4G Wi-Fi frequency band only passes through one combiner, so the signal performance is compared to other signal performance better.
  • the performance of the transmitted signal belonging to the N78 frequency band is better
  • the performance of the transmitted signal belonging to the 5G Wi-Fi frequency band is better.
  • 2.4G Wi-Fi, 5G Wi-Fi, and N78 use their own antennas to transmit signals, or 2.4G Wi-Fi and N78 share antennas to achieve signal transmission.
  • 5G the number of frequency bands has increased a lot, and more and more antennas are required.
  • the space of the mobile phone has not increased, which brings great challenges to the antenna and structural design of the mobile phone. Therefore, in the embodiment of this application, the 2.4G Wi-Fi, 5G Wi-Fi and N78 transmissions share the same antenna, and the number of antennas is reduced under the premise of ensuring their performance; at the same time, it also makes room for the tight PCB area. out of space.
  • the biggest risk of using a common antenna for the transmit paths is that due to the nonlinearity of semiconductor devices, the three transmit signals will generate intermodulation interference inside the combiner, and the intermodulation products will fall within the receive band.
  • the signal to be transmitted of N78 intermodulates with the signal to be transmitted of 2.4G Wi-Fi
  • the third-order intermodulation product (IMD3) falls in the receiving band of 5G Wi-Fi
  • the size of IMD3 depends on the IIP3 of the device and the power of the input signal. Assuming that N78 is used as high-power user equipment (HPUE), it transmits at 26dBm, and 2.4G and 5G Wi-Fi transmits at 17dBm. When the IIP3 of the combiner is greater than 90, the IMD3 is lower than -108dBm and lower than Wi-Fi The bottom noise of the -Fi antenna mouth, so the receiving sensitivity of Wi-Fi will not be deteriorated.
  • SAW SAW filters
  • IM3 represents the third order intermodulation product (3rd order intermodulation product)
  • IIP3 represents the input third order intercept point (Input 3rd order intercept point)
  • OIP3 represents the output third order Cut point (Output 3rd order intercept point).
  • FIG. 7 is a schematic structural diagram of the radio frequency front-end module provided by the embodiment of the present application. As shown in FIG. 7 , the module 70 includes the signal transmitting device of any of the foregoing embodiments.
  • FIG. 8 is a schematic structural diagram of the electronic device provided by the embodiment of the present application. As shown in FIG. 8 , the device 80 includes the signal transmitting device of any of the foregoing embodiments.

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Abstract

本申请提供了信号发射装置及射频前端模块、设备;其中,所述信号发射装置包括:第一合路器、第二合路器和天线;其中,所述第一合路器,用于将输入的第一待发射信号和输入的第二待发射信号进行合路,从而输出第一合路信号给所述第二合路器;所述第二合路器,用于将输入的第三待发射信号和输入的所述第一合路信号进行合路,从而输出第二合路信号给所述天线;所述天线,用于发射所述第二合路信号。

Description

信号发射装置及射频前端模块、设备
相关申请的交叉引用
本申请基于申请号为202210117124.2、申请日为2022年02月07日的中国专利申请提出,并要求该中国专利申请的优先权,该中国专利申请的全部内容在此以全文引入的方式引入本申请。
技术领域
本申请涉及通信技术,涉及但不限于信号发射装置及射频前端模块、设备。
背景技术
随着第五代移动通信技术(5th Generation Mobile Communication Technology,5G)的到来,频段数量增加了很多,需要的天线也越来越多,但是手机、电话手表等电子设备的空间并没有增加,因此给这些设备的天线及结构设计带来了很大的挑战。
发明内容
本申请提供的信号发射装置及射频前端模块、设备,能够减少天线数量,从而节约装置的占用空间。
根据本申请实施例的一个方面,提供一种信号发射装置,包括:第一合路器、第二合路器和天线;其中,所述第一合路器,用于将输入的第一待发射信号和输入的第二待发射信号进行合路,得到第一合路信号,以及输出所述第一合路信号给所述第二合路器;所述第二合路器,用于将输入的第三待发射信号和输入的所述第一合路信号进行合路,得到第二合路信号,以及输出所述第二合路信号给所述天线;所述天线,用于发射所述第二合路信号;
如此,将三路待发射信号通过两个合路器实现共用一个天线,从而减少了天线数量,节约了信号发射装置的面积。
在一些实施例中,第一合路器的输入双音三阶交调点(Input 3rd order intercept point,IIP3)大于第一阈值,所述第二合路器的IIP3大于第二阈值,从而使得信号输入至各合路器后产生的交调产物对接收信号的干扰满足指标要求,进而在满足通信性能的前提下,减少了天线数量,节约了信号发射装置的面积。
根据本申请实施例的一个方面,提供一种射频前端模块,包括本申请实施例所述的任一信号发射装置。
根据本申请实施例的一个方面,提供一种电子设备,包括本申请实施例所述的任一信号发射装置和电源模块;其中,所述电源模块,用于为所述信号发射装置供电。
应当理解的是,以上的一般描述和后文的细节描述仅是示例性和解释性的,并不能限制本申请。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分,这些附图示出了符合本申请的实施例,并与说明书一起用于说明本申请的技术方案。显而易见地,下面描述中的附图仅仅是本申请的一些实施例,对于本领域普通技术人员来讲,在不付出创造性劳动的前提下,还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的信号发射装置的结构示意图;
图2为本申请实施例提供的另一信号发射装置的结构示意图;
图3为本申请实施例提供的又一信号发射装置的结构示意图;
图4为本申请实施例提供的再一信号发射装置的结构示意图;
图5为本申请实施例提供的另一信号发射装置的结构示意图;
图6为本申请实施例提供的又一信号发射装置的结构示意图;
图7为本申请实施例提供的射频前端模块的结构示意图;
图8为本申请实施例提供的电子设备的结构示意图。
具体实施方式
为使本申请实施例的目的、技术方案和优点更加清楚,下面将结合本申请实施例中的附图,对本申请的具体技术方案做进一步详细描述。以下实施例用于说明本申请,但不用来限制本申请的范围。
除非另有定义,本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中所使用的术语只是为了描述本申请实施例的目的,不是旨在限制本申请。
在以下的描述中,涉及到“一些实施例”,其描述了所有可能实施例的子集,但是可以理解,“一些实施例”可以是所有可能实施例的相同子集或不同子集,并且可以在不冲突的情况下相互结合。
本申请实施例中出现的“第一、第二、第三”等描述,仅作示意与区分描述对象之用,没有次序之分,也不表示本申请实施例中对设备个数的特别限定,不能构成对本申请实施例的任何限制。
本申请实施例中出现的“连接”是指直接连接或者间接连接等各种电性连接方式,以实现消息/信号的传递,本申请实施例对此不做任何限定。
本申请实施例中出现的“输出”是指直接输出或者间接输出信号,本申请实施例对此不做任何限定。
本申请实施例提供一种信号发射装置,图1为本申请实施例提供的信号发射装置的结构示意图,如图1所示,信号发射装置10至少包括:第一合路器101、第二合路器102和天线103;其中,
第一合路器101,用于将输入的第一待发射信号和输入的第二待发射信号进行合路,得到第一合路信号,输出所述第一合路信号给第二合路器102;
第二合路器102,用于将输入的第三待发射信号和输入的所述第一合路信号进行合路,得到第二合路信号,输出所述第二合路信号给天线103;
天线103,用于发射所述第二合路信号;
其中,第一合路器101的IIP3大于第一阈值,第二合路器102的IIP3大于 第二阈值,从而使得信号输入至各合路器后产生的交调产物对接收信号的干扰满足指标要求。
需要说明的是,IIP3,即三阶输入交调点/输入双音三阶交调点,是表征器件线性度的指标参数,也就是表征合路器线性度的指标参数。在本申请实施例中,对于第一阈值和第二阈值的大小不做限定,总之能够使得各信号进入合路器后产生的交调产物对接收信号的干扰满足指标要求即可。第一阈值和第二阈值的大小可以相同,也可以不同。
举例而言,第一待发射信号对应的频段为5G Wi-Fi频段,第二待发射信号对应的频段为N78频段,第三待发射信号对应的频段为2.4G Wi-Fi频段。也就是,第一待发射信号的频点属于5G Wi-Fi频段,第二待发射信号的频点属于N78频段,第三待发射信号的频点属于2.4G Wi-Fi频段。假设天线103以26dBm(最小值)的功率发射第一待发射信号,以17dBm(最小值)的功率发射第二待发射信号和第三待发射信号,那么当第一合路器101和第二合路器102的IIP3大于90时,三阶交调产物(IMD3)低于-108dBm,且低于Wi-Fi天线口底噪,即对接收信号的干扰满足指标要求,所以对Wi-Fi的接收灵敏度不会造成恶化。
在本申请实施例中,将三路待发射信号通过两个合路器(即101和102)实现共用一个天线103;其中,第一合路器101的IIP3大于第一阈值,第二合路器102的IIP3大于第二阈值,从而使得信号输入至各合路器后产生的交调产物对接收信号的干扰满足指标要求,进而在满足通信性能的前提下,减少了天线数量,节约了信号发射装置10的面积。
本申请实施例再提供一种信号发射装置,图2为本申请实施例提供的另一信号发射装置的结构示意图,如图2所示,信号发射装置20包括:第一合路器101、第二合路器102、天线103、第一滤波器201、第二滤波器202、第一PAMiD 203、第二PAMiD 204和第三PAMiD 205;其中,
第一PAMiD 203,用于输出第四待发射信号给第一滤波器201;
第二PAMiD 204,用于输出第五待发射信号给第二滤波器202;
第三PAMiD 205,用于输出第二待发射信号给第一合路器101;
第一滤波器201,用于对输入的第四待发射信号进行滤波处理,得到所述第三待发射信号;以及用于对输入的接收信号进行滤波处理,以避免在PAMiD的LNA中产生的交调干扰;
第二滤波器202,用于对输入的第五待发射信号进行滤波处理,得到所述第一待发射信号;以及用于对输入的接收信号进行滤波处理,以避免在PAMiD的LNA中产生的交调干扰。
可以理解的,PAMiD是集成双工器的功效模块,是把功率放大器(PA)、滤波器、和/或开关甚至低噪声放大器(LNA)集成进来,让射频前端从以前一个复杂的系统设计工程变得更加简单的器件。
在将信号输入至合路器之前,将信号先输入至滤波器中;如此,一方面,对于接收信号而言,可以抑制带外的接收信号,所以不会在LNA发生交调干扰;另一方面,对于发射信号而言,可以滤除带外的发射信号,所以能够减少对主频信号的干扰,从而提升通信性能。
在本申请实施例中,对于第一滤波器201和第二滤波器202的类型和型号均不做限定,可以是各种各样的,总之能够达到上述目标,满足实际指标要求即可。例如,在一些实施例中,第一滤波器201和第二滤波器202为声表滤波器(SAW)。
在本申请实施例中,对于第一待发射信号、第二待发射信号和第三发射信号所对应的/所属的频段不做限定。在一些实施例中,所述第一待发射信号的频点、所述第二待发射信号的频点、以及所述第三待发射信号的频点,两两之间的差值大于第三阈值;如此,能够避免或减少各个信号在天线端的相互干扰。当然,对于第三阈值的大小也不做限定,以各个信号在天线端不会相互干扰或干扰程度满足指标要求即可。
进一步地,在一些实施例中,如图3所示,所述第一待发射信号属于5G Wi-Fi频段,所述第二待发射信号属于N78频段,所述第三待发射信号属于2.4G Wi-Fi频段;也就是,所述第一待发射信号对应的频段为5G Wi-Fi频段,所述 第二待发射信号对应的频段为N78频段,所述第三待发射信号对应的频段为2.4G Wi-Fi频段。
或者,在另一些实施例中,如图4所示,所述第一待发射信号属于5G Wi-Fi频段,所述第二待发射信号属于2.4G Wi-Fi频段,所述第三待发射信号属于N78频段;也就是,所述第一待发射信号对应的频段为5G Wi-Fi频段,所述第二待发射信号对应的频段为2.4G Wi-Fi频段,所述第三待发射信号对应的频段为N78频段。
或者,在又一些实施例中,如图5所示,所述第一待发射信号属于2.4G Wi-Fi频段,所述第二待发射信号属于N78频段,所述第三待发射信号属于5G Wi-Fi频段。也就是,所述第一待发射信号对应的频段为2.4G Wi-Fi频段,所述第二待发射信号对应的频段为N78频段,所述第三待发射信号对应的频段为5G Wi-Fi频段。
可以理解地,相比于图4和图5所示的电路结构而言,属于2.4G Wi-Fi频段的待发射信号仅经历一个合路器,所以信号性能相比于其他信号的性能而言较好。同理,对于图4所示的电路结构中,属于N78频段的发射信号的性能较好,对于图5所示的电路结构中,属于5G Wi-Fi频段的发射信号的性能较好。
在一些实施例中,通过将2.4G Wi-Fi、5G Wi-Fi、N78分别采用各自的天线发射信号,或者将2.4G Wi-Fi与N78共天线,从而实现信号的传输。然而,随着5G的到来,频段数量增加了很多,需要的天线也越来越多。但是,手机的空间并没有增加,这给手机的天线及结构设计带来了很大的挑战。因此,在本申请实施例中,将2.4G Wi-Fi、5G Wi-Fi与N78的发射共用同一根天线,在保证各自性能的前提下,减少天线数量;同时,也为紧张的PCB面积腾出空间。
如图6所示,将N78的发射与5G Wi-Fi通过合路器101合路后再与2.4G Wi-Fi合路器102合路,最后2.4G Wi-Fi合路器102连接到天线103发射出去。
然而,发射通路共天线最大的风险在于:由于半导体器件的非线性,三路发射信号会在合路器内部产生交调干扰,交调产物落在接收带内。如N78的待发射信号与2.4G Wi-Fi的待发射信号交调,三阶交调产物(IMD3)落在5G Wi-Fi 接收带,以及N78的待发射信号与5G Wi-Fi的待发射信号交调,IMD3落在2.4G Wi-Fi接收带内,从而引起被干扰频段的灵敏度恶化的情况。由于各个接收通路上都有声表滤波器(SAW),可以抑制带外的接收信号,所以不会在LNA发生交调干扰,交调主要发生在SAW前面的合路器。经过研究分析发现,对于无源器件,根据如下IMD3(三阶交调产物)的计算公式(1)和公式(2),IMD3的大小取决于器件的IIP3及输入信号的功率。假设N78做高功率用户设备(HPUE),以26dBm的功率发射,2.4G及5G Wi-Fi以17dBm的功率发射,当合路器的IIP3大于90时,IMD3低于-108dBm,且低于Wi-Fi天线口底噪,所以对Wi-Fi的接收灵敏度不会造成恶化。
IM3(dBm)@2f2-f1
=2P2in(dBm)+P1in(dBm)-2IIP3(dBm)+G(dB)     (1);
=2P2out(dBm)+P1out(dBm)-2OIP3(dBm)
IM3(dBm)@2f1-f2
=2P1in(dBm)+P2in(dBm)-2IIP3(dBm)+G(dB)     (2)。
=2P1out(dBm)+P2out(dBm)-2OIP3(dBm)
式(1)和(2)中,IM3表示的是三阶互调产物(3rd order intermodulation product),IIP3表示的是输入三阶截点(Input 3rd order intercept point),OIP3表示的是输出三阶截点(Output 3rd order intercept point)。
本申请实施例提供一种射频前端模块,图7为本申请实施例提供的射频前端模块的结构示意图,如图7所示,该模块70包括前述任意实施例的信号发射装置。
本申请实施例提供一种电子设备,图8为本申请实施例提供的电子设备的结构示意图,如图8所示,该设备80包括前述任意实施例的信号发射装置。
应理解,说明书通篇中提到的“一个实施例”或“一实施例”或“一些实施例”意味着与实施例有关的特定特征、结构或特性包括在本申请的至少一个实施例中。因此,在整个说明书各处出现的“在一个实施例中”或“在一实施例中”或“在一些实施例中”未必一定指相同的实施例。此外,这些特定的特征、结构或特性可以任意适合的方式结合在一个或多个实施例中。应理解,在 本申请的各种实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。上述本申请实施例序号仅仅为了描述,不代表实施例的优劣。上文对各个实施例的描述倾向于强调各个实施例之间的不同之处,其相同或相似之处可以互相参考,为了简洁,本文不再赘述。
本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如对象A和/或对象B,可以表示:单独存在对象A,同时存在对象A和对象B,单独存在对象B这三种情况。
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括该要素的过程、方法、物品或者设备中还存在另外的相同要素。
本申请所提供的几个方法实施例中所揭露的方法,在不冲突的情况下可以任意组合,得到新的方法实施例。
本申请所提供的几个产品实施例中所揭露的特征,在不冲突的情况下可以任意组合,得到新的产品实施例。
本申请所提供的几个方法或设备实施例中所揭露的特征,在不冲突的情况下可以任意组合,得到新的方法实施例或设备实施例。
以上所述,仅为本申请的实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应以所述权利要求的保护范围为准。

Claims (16)

  1. 一种信号发射装置,所述装置至少包括:第一合路器、第二合路器和天线;其中,
    所述第一合路器,用于将输入的第一待发射信号和输入的第二待发射信号进行合路,得到第一合路信号,以及输出所述第一合路信号给所述第二合路器;
    所述第二合路器,用于将输入的第三待发射信号和输入的所述第一合路信号进行合路,得到第二合路信号,以及输出所述第二合路信号给所述天线;
    所述天线,用于发射所述第二合路信号。
  2. 根据权利要求1所述的装置,其中,所述第一合路器的指标参数大于第一阈值,所述第二合路器的指标参数大于第二阈值,从而使得信号输入至各合路器后产生的交调产物对接收信号的干扰满足指标要求。
  3. 根据权利要求2所述的装置,其中,所述指标参数包括IIP3。
  4. 根据权利要求1所述的装置,其中,所述装置还包括第一滤波器;其中,
    所述第一滤波器,用于对输入的第四待发射信号进行滤波处理,得到所述第三待发射信号。
  5. 根据权利要求1至4任一项所述的装置,其中,所述装置还包括第二滤波器;其中,
    所述第二滤波器,用于对输入的第五待发射信号进行滤波处理,得到所述第一待发射信号。
  6. 根据权利要求4所述的装置,其中,所述第一滤波器为SAW。
  7. 根据权利要求5所述的装置,其中,所述第二滤波器为SAW。
  8. 根据权利要求4所述的装置,其中,所述装置还包括第一PAMiD;其中,所述第一PAMiD,用于输出所述第四待发射信号给所述第一滤波器。
  9. 根据权利要求5所述的装置,其中,所述装置还包括第二PAMiD;其中,
    所述第二PAMiD,用于输出所述第五待发射信号给所述第二滤波器。
  10. 根据权利要求1至9任一项所述的装置,其中,所述装置还包括:第三PAMiD;其中,
    所述第三PAMiD,用于输出所述第二待发射信号给所述第一合路器。
  11. 根据权利要求1至3任一项所述的装置,其中,所述第一待发射信号的频点、所述第二待发射信号的频点、以及所述第三待发射信号的频点,两两之间的差值大于第三阈值。
  12. 根据权利要求11所述的装置,其中,所述第一待发射信号对应的频段为5G Wi-Fi频段,所述第二待发射信号对应的频段为N78频段,所述第三待发射信号对应的频段为2.4G Wi-Fi频段。
  13. 根据权利要求11所述的装置,其中,所述第一待发射信号对应的频段为5G Wi-Fi频段,所述第二待发射信号对应的频段为2.4G Wi-Fi频段,所述第三待发射信号对应的频段为N78频段。
  14. 根据权利要求11所述的装置,其中,所述第一待发射信号对应的频段为2.4G Wi-Fi频段,所述第二待发射信号对应的频段为N78频段,所述第三待发射信号对应的频段为5G Wi-Fi频段。
  15. 一种射频前端模块,所述模块包括权利要求1至14任一所述的信号发射装置。
  16. 一种电子设备,所述设备包括权利要求1至14任一所述的信号发射装置和电源模块;其中,所述电源模块,用于为所述信号发射装置供电。
PCT/CN2022/142707 2022-02-07 2022-12-28 信号发射装置及射频前端模块、设备 WO2023147749A1 (zh)

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