CN113162637A - System-in-package terminal and method of antenna multiplexer - Google Patents
System-in-package terminal and method of antenna multiplexer Download PDFInfo
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- CN113162637A CN113162637A CN202110470054.4A CN202110470054A CN113162637A CN 113162637 A CN113162637 A CN 113162637A CN 202110470054 A CN202110470054 A CN 202110470054A CN 113162637 A CN113162637 A CN 113162637A
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- multiplexer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/005—Details 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2283—Supports; Mounting means by structural association with other equipment or articles mounted in or on the surface of a semiconductor substrate as a chip-type antenna or integrated with other components into an IC package
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
- H01Q1/243—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use with built-in antennas
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H9/00—Networks comprising electromechanical or electro-acoustic devices; Electromechanical resonators
- H03H9/70—Multiple-port networks for connecting several sources or loads, working on different frequencies or frequency bands, to a common load or source
- H03H9/703—Networks using bulk acoustic wave devices
- H03H9/706—Duplexers
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Signal Processing (AREA)
- Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)
- Transceivers (AREA)
Abstract
The invention provides a system-in-package terminal and a method of an antenna multiplexer, which solve the problem that the antenna multiplexer is difficult to realize by a single SAW/BAW/IPD filter technology, and the terminal enables different radios to share a single antenna, thereby solving the problem that the number of antennas in a mobile phone is large and the size is large. The system-in-package terminal of the antenna multiplexer provided by the invention comprises a multiplexer, wherein the multiplexer is used for loading and separating signals in different frequency bands; the band-pass filter is used for allowing the specific frequency band signal to pass through and filtering other frequency band signals; the band-pass filter is connected with the radio frequency port of the corresponding frequency band of the multiplexer, and the other end of the band-pass filter is directly led out to serve as the radio frequency port of the terminal; an antenna port serving as a terminal is directly led out from a public end of the multiplexer, and the antenna port is used for sending and receiving signals of different frequency bands; the terminal also comprises a substrate, and the multiplexer and the band-pass filter are attached to the substrate.
Description
Technical Field
The invention belongs to the field of filters and the field of system-in-package, and particularly relates to a system-in-package terminal and a method of an antenna multiplexer.
Background
The complexity of the radio frequency front end of the mobile phone is higher and higher due to the coming of the 5G era, the most obvious is the increase of the number of antennas, 4-8 antennas are arranged in a typical 4G mobile phone structure, and 4-6 antennas are required to be added in the 5G mobile phone due to the addition of a 5G NR frequency band and new requirements of 4 x 4MIMO (multiple input multiple output), EN-DC (double connection) and the like. However, the 5G mobile phone reserves less space for the antenna due to the addition of new functions such as face recognition, additional camera, large-sized battery and the like. Therefore, antenna multiplexers have come to work, and the antenna multiplexer combines a plurality of RF filters together to support different wireless technologies (WiFi, GNSS, 4G, 5G, etc.), thereby increasing the number of frequency bands that can share a single antenna and reducing the number of filters and antennas.
The antenna multiplexer is implemented based on a single filter technology (one of surface acoustic wave SAW, bulk acoustic wave BAW or integrated passive device IPD technology), implementing the function of multiband filtering on a single die. Due to the limiting factors such as materials, processes, sizes and the like, the surface acoustic wave filter generates heat seriously when processing high frequency, influences the performance and is generally suitable for frequency application below 1.5 GHz; the bulk acoustic wave filter is insensitive to temperature and is suitable for frequency bands above 2 GHz; surface acoustic wave or bulk acoustic wave filters are narrow in frequency band and integrated passive device filters are generally used for broadband applications. The antenna multiplexer is used for filtering of WiFi, GNSS, 4G and 5G frequency bands, relates to various frequency band types such as low frequency band, middle frequency band, high frequency band, narrow band and broadband, and is realized by using a single SAW \ BAW \ IPD technology, the realization difficulty is very high, the technology is also mostly mastered by foreign manufacturers, and the domestic technology is difficult to realize at present.
In the prior art, a radio frequency front end architecture of a mobile phone (taking WiFi and GNSS as examples) includes: the antenna unit is used for transmitting and receiving signals of 2.4G/5G WiFi, GNSS L1 and GPS L5 frequency bands; the filter unit connected with the antenna unit comprises a multiplexer for separating or loading signals of different frequency bands or comprises a band-pass filter for filtering frequency signals outside a specific frequency band; the other end of the filter unit is connected with the radio frequency amplifier unit, and the filter unit comprises a power amplifier and a low noise amplifier, wherein the power amplifier is used for amplifying signals transmitted by the baseband chip, and the low noise amplifier is used for amplifying weak signals received from the antenna. In the WiFi and GNSS architecture of the current mobile phone, 3 antennas (one antenna in 2.4G/5G WiFi frequency band, one antenna in GNSS L1 frequency band, one antenna in GPS L5 frequency band) and 3 to 5 filters are generally needed, and the number of antennas is large, and the occupied space is also large. In 5G mobile phones, the space left for the antenna is smaller and smaller, and how to solve the contradiction between the larger number of antennas and the smaller space becomes the key problem.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a system-in-package terminal and a method of an antenna multiplexer, which solve the problem of high difficulty in realizing the antenna multiplexer by using a single SAW/BAW/IPD filter technology and also solve the problem of excessive antennas in a mobile phone caused by the fact that corresponding antennas need to be matched in different radio technologies.
The invention provides a system-in-package terminal of an antenna multiplexer, which comprises a terminal antenna port and a terminal radio frequency port;
the terminal also comprises
The multiplexer is used for loading and separating signals of different frequency bands; the multiplexer is provided with a multiplexer radio frequency port and a multiplexer public port;
the band-pass filters are used for allowing signals in a specific frequency band to pass and filtering other frequency band signals, one end of each band-pass filter is connected with the multiplexer radio frequency port, and the other end of each band-pass filter is communicated with the terminal radio frequency port;
the multiplexer public port is communicated with the terminal antenna port, and the terminal antenna port is used for sending and receiving signals of different frequency bands;
the terminal also comprises a substrate, and the multiplexer and the band-pass filter are attached to the substrate.
Preferably, a matching element is disposed between the multiplexer and the band pass filter.
Preferably, the matching element is a combination of LC devices, and is connected to the multiplexer and the bandpass filter through a trace.
Preferably, the multiplexer and the band pass filter type are any one of a surface acoustic wave filter, a bulk acoustic wave filter, or an integrated passive device filter.
Preferably, the filter inside the multiplexer may be any one of a low-pass filter and a band-pass filter according to a frequency band.
Preferably, the filter inside the multiplexer may be any one of a high pass filter and a band pass filter according to a frequency band.
The invention also provides a system-in-package method of the antenna multiplexer, which comprises the system-in-package terminal of the antenna multiplexer in any technical scheme, wherein the packaging form of the terminal is different according to the terminal, and the terminal comprises LGA-9, LGA-6 and LGA-16.
The invention has the beneficial effects that:
(1) the invention combines SAW, BAW and IPD filters of different technologies together through packaging in a system-in-package implementation mode, realizes the same function as a foreign antenna multiplexer product, and can realize the filtering function in different frequency band types such as low frequency band, medium frequency band, high frequency band, narrow band, broadband and the like (the frequency band is mainly WiFi and GNSS frequency band).
(2) The invention utilizes the technical advantages of the SAW/BAW/IPD filter in different frequency bands, utilizes the filtering advantages of the SAW filter in a low frequency band, the BAW filter in a middle and high frequency band and the IPD filter in a wide frequency band, solves the problem of high difficulty in realizing the antenna multiplexer by a single SAW/BAW/IPD filter technology, has low cost, high flexibility and wide applicability in a system-level packaging implementation mode, has shorter research and development marketing period, and can break through the situation of monopoly abroad of the product.
(3) According to the invention, different filter combinations are packaged together in a bare chip form in a system-in-package mode to form a system-in-package terminal of the antenna multiplexer, so that different radio signals can share one antenna to realize a transceiving function, thereby reducing the number of antennas and the number of filters, and solving the problem of size reduction caused by the increase of the number of antennas in a 5G mobile phone.
Drawings
FIG. 1 is a system-in-package terminal of the antenna multiplexer applied to the WiFi 2.4G/5G/GNSS L1 frequency band according to the present invention;
FIG. 2 is a system-in-package of the antenna multiplexer of the present invention applied to the WiFi 2.4G/5G/GNSS L1 band;
FIG. 3 is a system-in-package terminal of the antenna multiplexer applied to the WiFi 2.4G/5G frequency band in accordance with the present invention;
FIG. 4 is a system-in-package of the antenna multiplexer of the present invention applied to the WiFi 2.4G/5G band;
FIG. 5 is a system-in-package terminal of the antenna multiplexer of the present invention applied to the WiFi 2.4G/5G/GNSS L1/GPS L5 frequency band;
FIG. 6 is a system-in-package format of the antenna multiplexer of the present invention applied to the WiFi 2.4G/5G/GNSS L1/GPS L5 frequency band;
FIG. 7 is a system-in-package terminal of the antenna multiplexer of the present invention with the 5G bandpass filter omitted;
fig. 8 is a BGA/DFN package format of the system-in-package terminal of the antenna multiplexer of the present invention.
Description of reference numerals:
100. a multiplexer; 101. a multiplexer radio frequency port; 102. a multiplexer common port; 1. a triplexer;
200. a band-pass filter; 2. a GNSS L1 band pass filter; 3. 2.4G WiFi band-pass filter; 4. a 5G WiFi band-pass filter; 5. a substrate; 7. a GNSS port; 8. a 2.4G WiFi port; 9. a 5G WiFi port; 10. routing; 11. a matching element;
300. a terminal antenna port; 310. and a terminal radio frequency port.
Detailed Description
In order to facilitate an understanding of the invention, the invention will now be described more fully hereinafter with reference to the accompanying drawings, in which several embodiments of the invention are shown, but which may be embodied in many different forms and are not limited to the embodiments described herein, but rather are provided for the purpose of providing a more thorough disclosure of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention; as used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The invention provides a system-in-package terminal of an antenna multiplexer, which comprises a terminal antenna port 300 and a terminal radio frequency port 310; the terminal also comprises
The multiplexer 100, the multiplexer 100 is used for loading and separating the signals of different frequency bands; the multiplexer 100 has a multiplexer rf port 101 and a multiplexer common port 102;
the band-pass filters 200 are used for allowing the specific frequency band signals to pass and filtering other frequency band signals, one end of each band-pass filter 200 is connected with the multiplexer radio frequency port 101 of the corresponding frequency band of the multiplexer 100, and the other end of each band-pass filter 200 is communicated with the terminal radio frequency port 310;
the common end of the multiplexer 100 is connected to the terminal antenna port 300, and the terminal antenna port 300 is used for transmitting and receiving signals of different frequency bands;
the terminal further includes a substrate 5, and the multiplexer 100 and the band pass filter 200 are mounted on the substrate 5.
Preferably, a matching element 11 is disposed between the multiplexer 100 and the band pass filter 200, the matching element 11 is usually a combination of LC devices, and the matching element 11 can make the port impedances of the multiplexer 100 and the band pass filter 200 consistent, so as to ensure that each filter can achieve the best performance.
Here, whether or not the matching element 11 is provided between the multiplexer 100 and the band pass filter 200 is determined according to actual situations such as a chip and a simulation.
Specifically, the matching element 11 is connected to the multiplexer 100 and the band pass filter 200 through the trace 10. For example, when the matching element 11 is set as an inductor, the inductor is connected to the multiplexer 100 and the band pass filter 200 through the trace 10.
Specifically, the multiplexer 100 and the band pass filter 200 may be any one of a surface acoustic wave filter, a bulk acoustic wave filter, or an integrated passive device filter.
Specifically, the filter inside the multiplexer 100 may be designed as any one of a low-pass filter and a band-pass filter according to the frequency band.
Specifically, the filter inside the multiplexer 100 may be designed as any one of a high-pass filter and a band-pass filter according to the frequency band.
The invention also provides a system-level packaging method of the antenna multiplexer, and the packaging form of the terminal is different according to the terminal, and comprises LGA-9, LGA-6 and LGA-16.
The following description will explain embodiments of the present invention in further detail with reference to the accompanying drawings. Wherein, SAW is a surface acoustic wave filter;
BAW is a bulk acoustic wave filter;
IPD is an integrated passive device filter;
WiFi refers to a wireless connection;
GPS refers to the global positioning system;
GNSS refers to global navigation satellite system;
2.4G/5G WiFi refers to a 2.4G frequency band of 2400-2483 MHz, and a 5G frequency band of 5150-5950 MHz;
the GPS L5 refers to the frequency band of 1166-1187 MHz;
the GNSS L1 refers to a frequency band 1560-1606 MHz;
BPF refers to a band pass filter;
DPX refers to a duplexer;
TPX refers to a triplexer;
QPX refers to a quadplexer.
Example 1
With reference to fig. 1 and fig. 2, the present embodiment specifically describes an antenna multiplexer system-level package terminal product applied to three frequency bands of 2.4G/5G WiFi and GNSS L1 as an example. The system-in-package terminal comprises an L1/2.4G/5G triplexer 1, a GNSS L1 band-pass filter 2, a 2.4G WiFi band-pass filter 3, a 5G WiFi band-pass filter 4 and a substrate 5. The triplexer 1 and the band pass filter are both in the form of a bare chip, and can be any one of the filters of SAW \ BAW \ IPD.
The L1/2.4G/5G triplexer 1 is used for loading and separating WiFi 2.4G (2400-2483 MHz), WiFi5G (5150-5950 MHz) and GNSS L1 (1560-1606 MHz) three-frequency-band signals. The 2.4G/5G/L1 port of the triplexer 1 is connected with a band-pass filter corresponding to the frequency band. And the common terminal of the triplexer 1 is connected to the terminal antenna port 300 (also referred to as the ANT port of the common terminal of the triplexer led out as a system-in-package terminal). The triplexer 1 can be realized based on any one of the technologies of SAW \ BAW \ IPD. The GNSS L1 filter inside the triplexer 1 may be a low pass filter or a band pass filter with a wider band, and the WiFi5G filter inside may be a high pass filter or a band pass filter with a wider band.
The 2.4G WiFi band-pass filter 3 filters out other unnecessary frequency band components, only 2400-2843 MHz frequency signals are reserved, and the transceiving filtering function of WiFi 2.4G frequency is achieved; one end of the 2.4G WiFi band-pass filter 3 is connected with the triplexer 1, and the other end of the 2.4G WiFi band-pass filter is led out to serve as a 2.4G WiFi port 8 of the system-in-package terminal. 2.4GWIFi bandpass filter 3 can be any form of SAW \ BAW \ IPD filter.
The 5G WiFi band-pass filter 4 filters other unnecessary frequency band components, only 5150-5950 MHz frequency signals are reserved, and the transceiving filtering function of a WiFi5G frequency band is achieved; one end of the 5G WiFi band-pass filter 4 is connected with the triplexer 1, and the other end of the 5G WiFi band-pass filter is led out to serve as a 5G WiFi port 9 of the system-in-package terminal (the same as the fact that the other end of the band-pass filter is connected with a terminal radio frequency port). The 5G WiFi band-pass filter 4 can be any one of SAW \ BAW \ IPD filters.
The GNSS L1 band-pass filter 2 filters out other unnecessary frequency band components, only frequency signals of 1560-1606 MHz are reserved, and the receiving and transmitting filtering functions of the GNSS L1 frequency band are achieved; one end of the GNSS L1 band-pass filter 2 is connected with the triplexer 1, and the other end is led out of a GNSS port 7 serving as a system-in-package terminal. The GNSS L1 band-pass filter 2 can be any form of SAW \ BAW \ IPD filter.
The L1/2.4G/5G triplexer 1, the GNSS L1 band pass filter 2, the 2.4G WiFi band pass filter 3 and the 5G WiFi band pass filter 4 are all mounted on the substrate 5, whether a matching element 11 is arranged between the triplexer 1 and the band pass filters is determined according to actual conditions such as chips, simulation and the like, the matching element 11 is usually a combination of LC devices, and the port impedances of the multiplexer 100 and the band pass filter 200 can be consistent through the matching element 11 so as to ensure that the filters can achieve the best performance.
As shown in fig. 2, the system-in-package format of the antenna multiplexer applied to the WiFi 2.4G/5G/GNSS L1 frequency band adopts the LGA-9 package format, the total size is 1.8mm × 1.4mm, the pad size is 0.25mm × 0.35mm, and the package format is compatible with the package format of foreign products, so that the use of the GNSS L1 antenna and a plurality of filters can be reduced in the application.
Example 2
The system-in-package terminal of the antenna multiplexer applied to the WiFi 2.4G/5G frequency band of the present invention is shown in fig. 3, and the difference between this embodiment and embodiment 1 is that the GNSS L1 frequency band selection and filtering function is not integrated, so the L1/2.4G/5G triplexer is replaced by a 2.4G/5G duplexer in the system-in-package implementation manner, and the GNSS L1 band pass filter 2 is omitted. The system-in-package is shown in FIG. 4 and is an LGA-6 package with a total size of 1.4mm × 1.1 mm. The product is suitable for application scenes which do not need a GNSS L1 frequency band, such as WiFi routers, set top boxes and the like. The size and cost are further reduced as the number of integrated filters becomes smaller.
Example 3
The system-in-package terminal applied to the antenna multiplexer of the WiFi 2.4G/5G/GNSS L1/GPS L5 frequency band provided by the present invention is as shown in fig. 5, and the embodiment is different from embodiment 1 in that frequency selection and filtering functions of the GPS L5 frequency band are added, so that in a system-in-package implementation manner, an L1/2.4G/5G triplexer is replaced with an L1/L5/2.4G/5G quadruplexer, and an L5 band-pass filter is added. The system-in-package is shown in FIG. 6 and is an LGA-16 package with a total size of 2.0mm × 1.6 mm. The product has higher integration level, and the L1/L5/2.4G/5G shares one antenna, so that the use of the L5 frequency band antenna is reduced, and the L5 frequency band antenna can be applied to a 5G high-end mobile phone with the requirement of an L5 frequency band.
Modification example 1
As shown in fig. 7, the 5G handset has low requirement on the frequency band above 5GHz, so the 5G filter in embodiments 1 to 3 of the present invention can be omitted according to the actual application requirement of the customer, which can further reduce the cost.
As shown in fig. 8, the size of the system-in-package terminal of the line multiplexer in embodiments 1-3 of the present invention can be changed according to the needs of customers, the package form can be compatible with not only the foreign product (LGA form), but also the BGA or DFN/QFN form, and the DFN/QFN package has high design difficulty but the lowest cost; BGA/LGA packaging has low design difficulty but high cost, and BGA requires ball mounting and has higher cost than LGA; the package format of the present invention is selected as the LGA format in consideration of design difficulty and cost.
The above examples only express certain embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention; it should be noted that, for those skilled in the art, without departing from the concept of the present invention, several variations and modifications can be made, which are within the protection scope of the present invention; therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. A system-in-package terminal of an antenna multiplexer is characterized in that the terminal comprises a terminal antenna port and a terminal radio frequency port;
the terminal also comprises
The multiplexer is used for loading and separating signals of different frequency bands; the multiplexer is provided with a multiplexer radio frequency port and a multiplexer public port;
the band-pass filters are used for allowing signals in a specific frequency band to pass and filtering other frequency band signals, one end of each band-pass filter is connected with the multiplexer radio frequency port, and the other end of each band-pass filter is communicated with the terminal radio frequency port;
the multiplexer public port is communicated with the terminal antenna port, and the terminal antenna port is used for sending and receiving signals of different frequency bands;
the terminal also comprises a substrate, and the multiplexer and the band-pass filter are attached to the substrate.
2. The system-in-package terminal for an antenna multiplexer of claim 1, wherein a matching element is disposed between the multiplexer and the band-pass filter.
3. The system-in-package terminal of claim 2, wherein the matching element is a combination of LC devices, and is connected to the band-pass filter through a trace and the multiplexer.
4. The system-in-package terminal for an antenna multiplexer of claim 1, wherein the multiplexer and the band pass filter type is any one of a surface acoustic wave filter, a bulk acoustic wave filter or an integrated passive device filter.
5. The system-in-package terminal of claim 1, wherein the filter inside the multiplexer can be any one of a low-pass filter and a band-pass filter according to the frequency band.
6. The system-in-package terminal of claim 1, wherein the filter inside the multiplexer can be any one of a high-pass filter and a band-pass filter according to the frequency band.
7. A system-in-package method of an antenna multiplexer, comprising a system-in-package terminal of an antenna multiplexer according to any one of claims 1-6, wherein the packaging format of the terminal differs according to the terminal, including LGA-9, LGA-6, LGA-16.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110470054.4A CN113162637A (en) | 2021-04-28 | 2021-04-28 | System-in-package terminal and method of antenna multiplexer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110470054.4A CN113162637A (en) | 2021-04-28 | 2021-04-28 | System-in-package terminal and method of antenna multiplexer |
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| CN113162637A true CN113162637A (en) | 2021-07-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116886121A (en) * | 2023-07-10 | 2023-10-13 | 荣耀终端有限公司 | Radio frequency circuit and electronic equipment |
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| KR20050033220A (en) * | 2003-10-06 | 2005-04-12 | 엘지전자 주식회사 | Rf front-end module for mobile phone |
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