Radio frequency module

Abstract

The utility model discloses a radio frequency module, and aims to solve the problems that the number of devices is large and the occupied area is large in the existing 5G radio frequency front-end scheme. A radio frequency signal is transmitted after passing through the ultrahigh frequency power amplifier, the high frequency power amplifier, the intermediate frequency power amplifier, the low frequency power amplifier and the multi-band integrated power amplifier and the filters and / or the multi-band integrated filters and / or the circulators in the corresponding band ranges. A plurality of frequency band power amplifiers are combined to form a multi-frequency band integrated power amplifier and / or a plurality of filters are combined to form a multi-frequency band integrated filter, and signals of a plurality of frequency bands are amplified and filtered at the same time. Meanwhile, the circulator is adopted to replace a duplexer, transmission and receiving isolation is achieved, the situation that a plurality of power amplifiers and filters are used for processing signals of all frequency bands is avoided, and therefore the radio frequency front end structure is simplified, and the number of devices and the cost are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of radio frequency front-end, and specifically relates to a radio frequency module. Background Technology

[0002] With the rapid development of 5G mobile communication technology, the design of mobile terminal radio frequency (RF) front-ends faces new challenges. 5G technology introduces several new frequency bands, such as ultra-high frequency (UHB) n77 (3300-4200MHz) and n79 (4400-5000MHz), leading to a significant increase in the number of RF front-end components, including power amplifiers (PAs), filters, and RF switches. Compared to traditional 4G frequency bands (high frequency HB 2300-2690MHz, intermediate frequency MB 1710-2025MHz, low frequency LB 663-960MHz), 5G RF front-ends require more components, resulting in increased cost, larger size, and higher power consumption.

[0003] Please refer to Figure 1 The existing RF module includes a first UHF power amplifier 6 and a second UHF power amplifier 7, which are used to transmit UHF RF signals in the n79 and n77 frequency bands, respectively. The first UHF power amplifier 6 and the second UHF power amplifier 7 are also connected to an n79 filter and an n77 filter, respectively, which are used to filter the RF signals in the n77 and n79 frequency bands. This structure has numerous components, leading to increased manufacturing costs. Utility Model Content

[0004] This utility model discloses a radio frequency front-end solution that simplifies the radio frequency front-end structure and reduces the number of components and cost.

[0005] This utility model discloses a radio frequency module, which can transmit ultra-high frequency, high frequency, intermediate frequency and low frequency signals; the radio frequency module includes: an ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier, a low frequency power amplifier and / or a multi-band integrated power amplifier;

[0006] Radio frequency signals are transmitted after passing through ultra-high frequency power amplifiers, high frequency power amplifiers, intermediate frequency power amplifiers, low frequency power amplifiers, and multi-band integrated power amplifiers, respectively, and then through filters and / or multi-band integrated filters and / or circulators in their corresponding frequency ranges.

[0007] Furthermore, the filters corresponding to the frequency band range include same-band filters with a single frequency range, frequency-tunable filters, and / or multi-frequency filters; wherein, the multi-frequency filter is formed by merging at least two same-band filters with different frequency ranges.

[0008] Furthermore, radio frequency signals of different frequencies within the same frequency band are transmitted after passing through an ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier or a low frequency power amplifier, as well as multi-frequency filters for the corresponding frequency band range, multiple filters for the same frequency band with a single frequency range, and / or adjustable filters.

[0009] Furthermore, the multi-band integrated power amplifier is composed of filters from at least two different frequency bands selected from an ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier, and a low frequency power amplifier.

[0010] Furthermore, at least two different frequency band radio frequency signals are transmitted after passing through a multi-band integrated power amplifier and a multi-band integrated filter for the corresponding frequency range.

[0011] Furthermore, the multi-band integrated filter is a frequency-tunable filter.

[0012] Furthermore, at least two different frequency band radio frequency signals are transmitted after passing through a multi-band integrated power amplifier and a band-tunable filter.

[0013] Compared with the prior art, the present invention has at least the following technical effects:

[0014] The RF module disclosed in this embodiment includes: an RF transceiver, an antenna switch, an ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier, a low frequency power amplifier, and a multi-band integrated power amplifier. RF signals are transmitted after passing through the ultra-high frequency power amplifier, high frequency power amplifier, intermediate frequency power amplifier, low frequency power amplifier, and multi-band integrated power amplifier, respectively, and then through filters and / or multi-band integrated filters and / or circulators corresponding to their respective frequency bands. By combining several frequency band power amplifiers or filters, signal amplification and filtering are performed simultaneously on signals from multiple frequency bands. Furthermore, the use of a circulator instead of a duplexer is proposed to achieve transmit and receive isolation, avoiding the need for multiple power amplifiers and filters to process signals from different frequency bands, thereby simplifying the RF front-end structure and reducing the number of components and cost. Attached Figure Description

[0015] Figure 1 This is a simplified schematic diagram of the structure of a radio frequency module in the prior art;

[0016] Figure 2 This is a simplified structural diagram of the radio frequency module in one embodiment of the present invention;

[0017] Figure 3 This is a simplified schematic diagram of another structure of the radio frequency module in one embodiment of the present invention;

[0018] Figure 4 This is a simplified schematic diagram of another structure of the radio frequency module in one embodiment of the present invention;

[0019] Figure 5 This is a simplified schematic diagram of another structure of the radio frequency module in one embodiment of the present invention;

[0020] Figure 6 This is a simplified schematic diagram of another structure of the radio frequency module in one embodiment of the present invention;

[0021] Figure 7 This is a simplified schematic diagram of another structure of the radio frequency module in one embodiment of the present invention. Detailed Implementation

[0022] The following description, in conjunction with schematic diagrams, illustrates a preferred embodiment of the present invention. It should be understood that those skilled in the art can modify the present invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the scope of the present invention.

[0023] The present invention will be described in more detail below by way of example with reference to the accompanying drawings. The advantages and features of the present invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the present invention.

[0024] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] Please refer to Figure 1 This embodiment provides a radio frequency (RF) module capable of transmitting ultra-high frequency (UHF), high frequency (HF), intermediate frequency (IF), and low frequency (LFM) signals. The RF module includes an UHF power amplifier, a HF power amplifier, an IF power amplifier, a LFM power amplifier, and / or a multi-band integrated power amplifier.

[0026] Radio frequency signals are transmitted after passing through ultra-high frequency power amplifiers, high frequency power amplifiers, intermediate frequency power amplifiers, low frequency power amplifiers, and multi-band integrated power amplifiers, respectively, and then through filters and / or multi-band integrated filters and / or circulators in their corresponding frequency ranges.

[0027] As can be seen, this embodiment combines several frequency band power amplifiers into a multi-band integrated power amplifier and / or combines multiple filters into a multi-band integrated filter, simultaneously amplifying and filtering signals from multiple frequency bands. It also proposes using a circulator instead of a duplexer to achieve transmit and receive isolation, avoiding the need for multiple power amplifiers and filters to process signals from different frequency bands, thereby simplifying the RF front-end structure and reducing the number of components and cost.

[0028] Furthermore, in this embodiment, the filters corresponding to the frequency band range include same-band filters with a single frequency range, frequency-tunable filters, and / or multi-frequency filters.

[0029] The multi-frequency filter is formed by merging at least two filters with different frequency ranges in the same frequency band. For example, the n77_n79 multi-frequency ultra-high frequency filter is formed by merging an n77 ultra-high frequency filter and an n79 ultra-high frequency filter.

[0030] Furthermore, in this embodiment, the frequency-tunable filter can adjust the filtering frequency according to the actual radio frequency signal.

[0031] In this embodiment, through the above-described configuration, radio frequency signals of different frequencies within the same frequency band are transmitted after passing through a single ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier or a low frequency power amplifier, and a multi-frequency filter for the corresponding frequency band range, multiple filters for the same frequency band within a single frequency range, and / or an adjustable filter. This avoids the need to use multiple filters or multiple power amplifiers to process signals of different frequencies within the same frequency band, thereby simplifying the radio frequency front-end structure and reducing the number of components and cost. For example, ultra-high frequency signals n77 and n79 can be transmitted after passing through a single ultra-high frequency power amplifier and a single n77_n79 multi-frequency ultra-high frequency filter.

[0032] Furthermore, the multi-band integrated power amplifier is composed of filters from at least two different frequency bands selected from ultra-high frequency power amplifiers, high frequency power amplifiers, intermediate frequency power amplifiers, and low frequency power amplifiers. For example, the multi-band integrated power amplifier is an ultra-high frequency and high frequency power amplifier composed of multiple ultra-high frequency power amplifiers and high frequency power amplifiers.

[0033] Furthermore, the multi-band integrated filter is formed by combining at least two filters from different frequency bands selected from ultra-high frequency filters, high frequency filters, intermediate frequency filters, and low frequency filters. For example, the multi-band integrated filter is an ultra-high frequency and high frequency filter formed by combining an ultra-high frequency filter and a high frequency filter.

[0034] In this embodiment, with the above-described configuration, at least two different frequency band radio frequency signals can be transmitted after passing through a multi-band integrated power amplifier and a multi-band integrated filter for the corresponding frequency range. This avoids the need to process signals from different frequency bands using multiple filters or power amplifiers, thereby simplifying the radio frequency front-end structure and reducing the number of components and cost. For example, ultra-high frequency signals and high frequency signals can be transmitted after passing through one ultra-high frequency and one high frequency power amplifier, as well as one ultra-high frequency filter and one high frequency filter.

[0035] Furthermore, the multi-band integrated filter can also be a frequency-tunable filter, which can adjust the filtering frequency band according to the actual radio frequency signal.

[0036] In one specific embodiment, the frequency band adjustable filter includes SAW filters and YIG filters, etc.

[0037] In one specific embodiment, please refer to Figure 2 The radio frequency module includes an ultra-high frequency power amplifier 1 and an ultra-high frequency filter 4.

[0038] Specifically, the output terminal of the radio frequency transceiver is connected to the input terminal of the ultra-high frequency power amplifier 1, and the output terminal of the ultra-high frequency power amplifier 1 is connected to the input terminal of the ultra-high frequency filter 5. The ultra-high frequency power amplifier 1 is used to amplify the radio frequency signals in the n77 and n79 frequency bands; the ultra-high frequency filter 5 is used to filter the radio frequency signals in the n77 and n79 frequency bands.

[0039] In this embodiment, the signals of the n77 and n79 frequency bands are simultaneously amplified and filtered by the ultra-high frequency power amplifier 1 and the ultra-high frequency filter 5, which avoids the need to use multiple power amplifiers and filters to process the n77 and n79 frequency band signals, thereby simplifying the RF front-end structure and reducing the number of devices and costs.

[0040] For further information, please refer to the following: Figure 2 The radio frequency antenna also includes a high-frequency power amplifier 2, an intermediate-frequency power amplifier 3, and a low-frequency power amplifier 4.

[0041] In this embodiment, the radio frequency bands that the high-frequency power amplifier 2 can pass through include, but are not limited to, the n41, n40 and n7 bands; the radio frequency bands that the intermediate frequency power amplifier 3 can pass through include, but are not limited to, the n1 and n4 bands; and the radio frequency bands that the low-frequency power amplifier 4 can pass through include, but are not limited to, the n5 and n71 bands.

[0042] The high-frequency power amplifier 2 is connected to filters n41, n40, and n7 respectively, and filters n41, n40, and n7 are used to pass high-frequency signals n41, n40, and n7 respectively; the intermediate-frequency power amplifier 3 is connected to filters n1 and n4 respectively, and filters n1 and n4 are used to pass intermediate-frequency signals n1 and n4 respectively; the low-frequency power amplifier 4 is connected to filters n5 and n71 respectively, and filters n5 and n71 are used to pass low-frequency signals n5 and n71 respectively.

[0043] Please refer to Figure 3In this embodiment, the intermediate frequency power amplifier and the high frequency power amplifier are combined into a mid-to-high frequency power amplifier 8. The frequency bands that the mid-to-high frequency power amplifier 8 can operate on include, but are not limited to, the n41, n40, n7, n1, and n4 frequency bands. And adopt... Figure 1 The structure utilizes an ultra-high frequency power amplifier 1 and an ultra-high frequency filter 5 to simultaneously amplify and filter signals in the n77 and n79 frequency bands, and a low-frequency power amplifier 4 to process signals, further simplifying the RF front-end structure. The remaining filters in this structure are individual filters, allowing those skilled in the art to select different types of filters according to integration requirements, further simplifying the RF front-end module structure.

[0044] Please refer to Figure 4 In this embodiment, the ultra-high frequency power amplifier and the high frequency power amplifier are combined into a single power amplifier, namely, a combined high frequency and ultra-high frequency power amplifier 9. The low frequency power amplifier and the intermediate frequency power amplifier are combined into a single mid-low frequency power amplifier 10.

[0045] In this embodiment, the radio frequency bands through which the high-frequency and ultra-high-frequency power amplifiers 9 pass include, but are not limited to, n41, n7, n40, n77, and n79. The radio frequency bands through which the mid-low-frequency power amplifier 10 passes include, but are not limited to, n1, n4, n5, and n71. Those skilled in the art can select the signals that the mid-low-frequency power amplifier 10 can filter according to actual conditions, for example, radio frequency signals from any mid-low frequency band in the FDD (Frequency Division Duplex) operating frequency bands n1-n71.

[0046] Furthermore, the output of the ultra-high frequency power amplifier is connected to an ultra-high frequency filter 5 and several individual filters. The ultra-high frequency filter 5 is used to filter the radio frequency signals in the n77 and n79 frequency bands, while the remaining individual filters (n41, n40, and n7 filters shown in the figure) are used to filter the n41, n40, and n7 radio frequency signals, respectively. In addition, the mid-low frequency power amplifier is connected to several filters, and the signals that these filters can filter include, but are not limited to, signals in any one of the n1, n4, n5, or n71 frequency bands. The specific model and number of filters depend on the radio frequency signal to be transmitted.

[0047] Please refer to Figure 5 It continued to use Figure 4The architecture of the mid-high frequency and ultra-high frequency filters 9 combines the high frequency and ultra-high frequency filters into a single high-frequency and ultra-high frequency filter 11. Ultra-high frequency and high frequency signals can be processed through a single high-frequency and ultra-high frequency power amplifier 9 and a single high-frequency and ultra-high frequency filter 11. Furthermore, the low-frequency power amplifier, mid-frequency power amplifier, and high-frequency amplifier are combined into a single low-mid-high frequency power amplifier 12, further simplifying the RF front-end structure.

[0048] In the above example, the radio frequency bands that the high-frequency and ultra-high-frequency power amplifier 9 and the high-frequency and ultra-high-frequency filter 11 can pass through include, but are not limited to, n41, n40, n77, and n79. The radio frequency bands that the low-mid-high-frequency power amplifier 12 can pass through include, but are not limited to, n1, n4, n5, n7, and n71. The low-mid-high-frequency power amplifier 12 is connected to multiple filters, and a single filter can filter signals from any one of the frequency bands n1, n4, n5, n7, or n71.

[0049] Furthermore, a circulator can be used instead of a filter.

[0050] For details, please refer to Figure 6 One end of the circulator is connected to the output terminals of the intermediate frequency power amplifier 3, the low frequency power amplifier 4 and the high frequency power amplifier 2 respectively, and the other end is connected to the input terminal of the antenna switch respectively.

[0051] As is understood, a circulator is a passive device that outputs an input signal along a specific path. In the RF front-end solution provided in this embodiment, the circulator utilizes the isolation characteristics between its ports to achieve isolation between FDD transmit and receive signals, thereby replacing a duplex filter.

[0052] For further details, please refer to... Figure 7 This embodiment can also combine all operating frequency band power amplifiers into a single power amplifier, that is, a full-band power amplifier 13. This further simplifies the RF front-end architecture.

[0053] Specifically, the input terminal of the full-band power amplifier 13 is connected to the output terminal of the radio frequency transceiver; the output terminal of the full-band power amplifier is connected to the input terminal of the antenna switch through a circulator.

[0054] In this embodiment, the radio frequency range that the full-band power amplifier can pass includes, but is not limited to, n41, n40, n77, n79, n1, n4, n5, and n71. Those skilled in the art can select the signals that the full-band power amplifier can filter according to the actual situation, such as the n77 and n79 frequency bands, and radio frequency signals of any frequency band from the FDD operating frequency band n1 to n71.

[0055] At this point, a circulator is used instead of a filter. The radio frequency signal passes through the radio frequency transceiver, power amplifier, and switching module in sequence to enter the output port of the circulator, and is then input from the input port of the circulator to the antenna for transmission.

[0056] Preferably, the input terminal of the radio frequency transceiver is connected to the baseband chip.

[0057] In summary, this invention, while capable of transmitting frequency bands from n1 to n79, integrates power amplifiers and filters for multiple radio frequency bands, effectively reducing the amount of radio frequency front-end devices required, thereby shrinking the size of the radio frequency front-end module, reducing costs, and improving energy efficiency.

[0058] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A radio frequency module, characterized by, The radio frequency module can pass through ultra-high frequency, high frequency, intermediate frequency and low frequency signals; the radio frequency module comprises: an ultra-high frequency power amplifier, a high frequency power amplifier, an intermediate frequency power amplifier, a low frequency power amplifier and / or a multi-band integrated power amplifier; The radio frequency signals pass through the ultra-high frequency power amplifier, the high frequency power amplifier, the intermediate frequency power amplifier, the low frequency power amplifier and the multi-band integrated power amplifier, and are respectively emitted after passing through the corresponding frequency range filter and / or the multi-band integrated filter and / or the circulator.

2. The radio module of claim 1, wherein, The corresponding frequency range filter comprises a single frequency range filter, a frequency adjustable filter and / or a multi-frequency filter; wherein the multi-frequency filter is formed by combining at least two different frequency range filters.

3. The radio module of claim 2, wherein the radio module is configured to: The radio frequency signals of the same frequency band and different frequencies pass through one ultra-high frequency power amplifier, one high frequency power amplifier, one intermediate frequency power amplifier or one low frequency power amplifier, and the corresponding frequency range multi-frequency filter, a plurality of single frequency range filters and / or adjustable filters.

4. The radio module of claim 1, wherein the radio module is configured to be coupled to a host device via the first interface and the second interface. The multi-band integrated power amplifier is formed by combining at least two different frequency range filters of the ultra-high frequency power amplifier, the high frequency power amplifier, the intermediate frequency power amplifier and the low frequency power amplifier.

5. The radio module of claim 4, wherein the first and second conductive layers are formed of a conductive material selected from the group consisting of copper, aluminum, silver, gold, and combinations thereof. The multi-band integrated filter is formed by combining at least two different frequency range filters of the ultra-high frequency filter, the high frequency filter, the intermediate frequency filter and the low frequency filter.

6. The radio frequency module of claim 4, wherein, The radio frequency signals of at least two different frequency bands pass through one multi-band integrated power amplifier and the corresponding frequency range multi-band integrated filter.

7. The radio module of claim 3, wherein the first and second conductive layers are formed of a conductive material selected from the group consisting of copper, aluminum, silver, gold, and combinations thereof. The multi-band integrated filter is a frequency adjustable filter.

8. The radio frequency module of claim 6, wherein, The radio frequency signals of at least two different frequency bands pass through one multi-band integrated power amplifier and the frequency adjustable filter.

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