CN117060951A - Radio frequency front-end antenna switching circuit and switching method - Google Patents
Radio frequency front-end antenna switching circuit and switching method Download PDFInfo
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- CN117060951A CN117060951A CN202311056417.5A CN202311056417A CN117060951A CN 117060951 A CN117060951 A CN 117060951A CN 202311056417 A CN202311056417 A CN 202311056417A CN 117060951 A CN117060951 A CN 117060951A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
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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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
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Abstract
The invention discloses a radio frequency front-end antenna switching circuit and a switching method, wherein a first radio frequency signal can enter a signal processing module for signal processing only through a three-pole three-throw switch, a single-pole double-throw switch and a TXM signal switching module or through the three-pole three-throw switch and the single-pole six-throw switch, a second radio frequency signal can enter the signal processing module for signal processing only through the single-pole double-throw switch and the TXM signal switching module after signal switching, and a third radio frequency signal can enter the signal processing module for signal processing only through the three-pole three-throw switch, a combiner and the DIFEM signal switching module after signal switching.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a radio frequency front end antenna switching circuit and a switching method.
Background
With the development of mobile communication, the requirements of mobile phones, tablet computers, notebooks and various intelligent modules on the rate are higher, especially with the wide application of 4G (the 4th Generation mobile communication technology, fourth generation mobile communication) mobile terminals, the requirements of mobile terminals on the received signals are higher, and the rate requirements are also increasing. The use of CA (Carrier Aggregation ), ASDiv (Antenna Switching Diversity, antenna main diversity path switching), TAS (MTK, smart antenna switching technology) and other technologies makes the downlink rate of the mobile terminal higher, the signal stronger, and the transmission experience better.
The radio frequency front end antenna switching scheme of the existing 4G mobile terminal with CA function mainly includes the following two types, please refer to fig. 1, the first main circuit includes: the antenna comprises a first antenna, a second antenna, a third antenna, a DP12T (double-pole twelve-throw) switch, a first DPDT (double-pole double-throw) switch, a second DPDT switch, a TXM (integrated power amplifier and radio frequency switch), a DIFEM (integrated radio frequency switch and filter), a DPDT switch, a first multiplexer and a second multiplexer, wherein the devices are connected through L-type or pi-type matching for adjusting impedance matching. Referring to fig. 2, the second main circuit includes: a first antenna, a second antenna, a third antenna, a DP12T switch, a DPDT switch, a three pole, three throw switch, a TXM, DIFEM, DPDT switch, a first duplex and a second duplex. The two three-antenna switching schemes have larger insertion loss, the premise is that the insertion loss of the GSM_HB (DCS 1800/PCS 1900) is large, the BOM (material) cost is more expensive, the device redundancy is larger, the patch cost is high, meanwhile, the antenna switching circuit is relatively complex, the research, development, debugging and verification time is longer, and the risk is larger.
Disclosure of Invention
The invention aims to provide a radio frequency front-end antenna switching circuit and a switching method, which simplify the circuit, reduce the insertion loss and the PCB (printed Circuit Board) ornament area and reduce the research, development, debugging and patch cost on the basis of meeting the use scene.
In order to solve the above technical problems, the present invention provides a radio frequency front end antenna switching circuit, including: the antenna comprises a first antenna, a second antenna, a third antenna, a three-pole three-throw switch, a signal processing module, a first switching path, a second switching path and a third switching path;
a first radio frequency signal is received through the first antenna and is switched to the second switching path or the third switching path through the three-pole three-throw switch;
the first radio frequency signal is also transmitted through the first antenna;
the second radio frequency signal is received through the third antenna and transmitted to the third switching path;
the third radio frequency signal is received through the second antenna and is switched to the first switching path through the three-pole three-throw switch;
the first switching path, the second switching path and the third switching path switch the frequency ranges of the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then switch the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing.
Further, the first switching path includes: a combiner and a DIFEM signal switching module;
the third radio frequency signal is switched by the combiner through the three-pole three-throw switch, and after the signal switching of the third radio frequency signal is carried out by the combiner and the DIFEM signal switching module, the third radio frequency signal is transmitted to the signal processing module for signal processing.
Further, the combiner switches the third radio frequency signal into a medium-high frequency signal and a low frequency signal.
Further, the DIFEM signal switching module includes a first radio frequency switch;
the first radio frequency switch receives the third radio frequency signals of different frequency bands and switches the third radio frequency signals to the signal processing module.
Further, the second switching path includes: a first single pole, multi-throw switch;
the first radio frequency signal is switched to the first single-pole multi-throw switch through the three-pole three-throw switch, and the first single-pole multi-throw switch transmits the first radio frequency signal to the signal processing module for signal processing.
Further, the first single-pole multi-throw switch comprises a single-pole six-throw switch, a single-pole eight-throw switch or a single-pole ten-throw switch.
Further, the third switching path includes: a second single pole multiple throw switch and a TXM signal switching module;
and after the first radio frequency signal and the second radio frequency signal are subjected to signal switching by the second single-pole multi-throw switch and the TXM signal switching module, the signals are transmitted to the signal processing module for signal processing.
Further, the second single pole, multi-throw switch comprises a single pole, double throw switch;
the first radio frequency signal is switched to the single-pole double-throw switch through the three-pole three-throw switch, and the single-pole double-throw switch transmits the first radio frequency signal to the signal processing module for signal processing.
Further, the third switching path further comprises a double pole double throw switch;
and after the first radio frequency signal and the second radio frequency signal are subjected to signal switching through the double-pole double-throw switch and the TXM signal switching module, the signals are transmitted to the signal processing module for signal processing.
Further, the TXM signal switching module includes a second radio frequency switch;
the second radio frequency switch receives the first radio frequency signal and the second radio frequency signal with different frequency bands, and inputs the first radio frequency signal and the second radio frequency signal to the signal processing module for signal processing.
The invention also provides a radio frequency front-end antenna switching method, which adopts the radio frequency front-end antenna switching circuit, and comprises the following steps:
the first radio frequency signal is received through the first antenna and is switched to the second switching path or the third switching path through the three-pole three-throw switch;
the second radio frequency signal is received through the third antenna and transmitted to the third switching path;
the third radio frequency signal is received through the second antenna and is switched to the first switching path through the three-pole three-throw switch;
the first switching path, the second switching path and the third switching path switch the frequency ranges of the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then switch the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing.
Further, the first radio frequency signal is received by the first antenna, is switched to a first single-pole multi-throw switch through a three-pole three-throw switch, and is transmitted to the signal processing module for signal processing through the first single-pole multi-throw switch;
or after passing through the three-pole three-throw switch, the first radio frequency signal is transmitted to the signal processing module for signal processing after passing through the second single-pole multi-throw switch and the TXM signal switching module.
Further, the third radio frequency signal is received through the second antenna, and is switched to the combiner through the three-pole three-throw switch, the combiner switches the third radio frequency signal frequency band to the DIFEM signal switching module, and the DIFEM signal switching module switches the third radio frequency signal to the signal processing module.
Further, the second radio frequency signal is received through the third antenna, and the second radio frequency signal is switched to the signal processing module for signal processing through a second single pole multiple throw switch and a TXM signal switching module.
Further, after the first radio frequency signal is subjected to signal processing by the signal processing module, the first radio frequency signal is transmitted to the first antenna to be transmitted through the TXM signal switching module and the second single-pole multi-throw switch;
or via a first single pole, multiple throw switch to the three pole, three throw switch and through the three pole, three throw switch to the first antenna transmit.
Further, the first antenna and the second antenna may be a main set antenna or a diversity antenna, and the third antenna is a receiving antenna of a side CA path.
Compared with the prior art, the invention has at least the following technical effects:
the invention receives the main set receiving signals through the first antenna and the third antenna, transmits the signals to the second switching path and the third switching path through the three-pole three-throw switch to switch the frequency bands, and inputs the signals to the signal processing module to process the signals, thereby realizing various main set CA combinations; and the second antenna is used for receiving diversity and receiving signals, and the signals are transmitted to the first switching path through the three-pole three-throw switch to switch the frequency bands, so that various diversity CA combinations are realized. The three antennas can be switched by only one three-pole three-throw switch, various CA functions are met, redundant switching elements are reduced, and the area of the ornament of the PCB and the BOM cost are reduced.
Further, the first radio frequency signal can be switched to the signal processing module to process the signal only through the three-pole three-throw switch, the first single-pole multi-throw switch or through the three-pole three-throw switch, the second single-pole multi-throw switch and the TXM signal switching module, the second radio frequency signal can enter the signal processing module to process the signal only through the second single-pole multi-throw switch and the TXM signal switching module, and the third radio frequency signal can enter the signal processing module to process the signal only through the three-pole three-throw switch, the combiner and the DIFEM signal switching module.
Drawings
Fig. 1 is a schematic diagram of a prior art rf front-end antenna switching circuit;
fig. 2 is a schematic diagram of another structure of a rf front-end antenna switching circuit in the prior art;
fig. 3 is a schematic structural diagram of a rf front-end antenna switching circuit according to a first embodiment of the present invention;
fig. 4 is a diagram showing a comparison of advantages of a switching circuit of a rf front-end antenna according to a first embodiment of the present invention and the prior art;
fig. 5 is a schematic diagram of a spatial layout of an antenna on a terminal device according to a second embodiment of the present invention.
Detailed Description
A radio frequency front end antenna switching circuit and switching method of the present invention will be described in more detail below with reference to the drawings, wherein preferred embodiments of the present invention are shown, it being understood that one skilled in the art could modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description is to be construed as broadly known to those skilled in the art and not as limiting the invention.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
Example 1
Referring to fig. 3, the present embodiment provides a radio frequency front end antenna switching circuit, which includes: the antenna comprises a first antenna ANT1, a second antenna ANT2, a third antenna ANT3, a three-pole three-throw switch 3P3T, a signal processing module, a first switching path, a second switching path and a third switching path.
The first radio frequency signal is received through the first antenna ANT1, and is switched through the three-pole three-throw switch 3P3T, so that the first radio frequency signal is switched to a second switching path or a third switching path. In addition, the first radio frequency signal may be further transmitted by being switched to the first antenna ANT1 via a second switching path or a third switching path.
The second radio frequency signal is received through the third antenna ANT3 and transmitted to the third switching path.
The third radio frequency signal is received by the second antenna ANT2 and is switched to the first switching path through the three-pole three-throw switch.
The first switching path, the second switching path and the third switching path perform frequency band switching on the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then input the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing and receiving.
Specifically, the first radio frequency signal and the second radio frequency signal are both main set receiving signals, and can be middle-low high frequency signals, so that any CA combination can be realized. The third radio frequency signal is a diversity receiving signal, and may be a middle-low high frequency signal. According to the antenna environment and simulation contrast, the antenna tuning switch matched with the first antenna ANT1 is a high-voltage switch, and the antenna tuning switch matched with the second antenna ANT2 and the third antenna ANT3 is a low-voltage switch.
The third switching path includes: a second single pole multiple throw switch 2 (SPXT) and a TXM signal switching module.
And the first radio frequency signal is transmitted to the signal processing module for signal processing after being subjected to signal switching by the three-pole three-throw switch, the second single-pole multi-throw switch 2 and the TXM signal switching module.
And the second radio frequency signal is transmitted to the signal processing module for signal processing after being subjected to signal switching by the second single-pole multi-throw switch 2 and the TXM signal switching module.
In this example, the TXM signal switching module includes a second radio frequency switch.
The second radio frequency switch receives the first radio frequency signal and the second radio frequency signal with different frequency bands, and inputs the second radio frequency signal into the signal processing module for filtering processing.
In a specific example, the second single pole, multi-throw switch 2 is a single pole, double throw Switch (SPDT). It will be appreciated that different radio frequency switches are also selected depending on the frequency band to be switched, for example, a double pole double throw switch or the like.
In another specific example, when the gsm_hb main antenna signal, the low-frequency signal (LB), and the medium-high frequency signal (MHB) are received by the first antenna ANT1 and transmitted to the third switching path, the first antenna ANT1 can be reached only through the three-pole three-throw switch, the second single-pole multi-throw switch 2, and the TXM signal switching module, and compared with the radio frequency signal in fig. 1, the radio frequency signal reaches the first antenna ANT1 through one double-pole double-throw switch, one double-pole twelve-throw switch, one second double-pole double-throw switch, one combiner, and one first double-pole double-throw switch, which has the advantage of more than 1dB in insertion loss of gsm_hb, and the debugging difficulty and risk are smaller. In addition, compared with the design scheme in fig. 2, the whole gsm_hb main antenna signal path is provided with one less combiner, and the single-pole double-throw switch can be adopted in the embodiment, so that the swinging part is reduced from multiple aspects, the design cost is reduced, the insertion loss of the gsm_hb main antenna signal is reduced, and the area of the PCB swinging part and the design cost are reduced.
The advantage of signal processing using only the first antenna ANT1, double pole double throw switch, single pole double throw switch, and TXM signal switching module described above is shown in fig. 4, it can be intuitively seen that the LB insertion loss is maximally optimized by 0.49dB relative to the prior art, the mhb insertion loss is maximally optimized by 0.58dB relative to the prior art, the gsm HB insertion loss is maximally optimized by 1.34dB relative to the conventional scheme, and the swing area is maximally optimized by 4.15mm relative to the prior art 2 The price is 0.5 yuan cheaper than the conventional scheme.
Further, the second switching path includes: a first single pole, multi throw switch 1.
The first radio frequency signal is switched to the first single-pole multi-throw switch 1 through the three-pole three-throw switch, and the first single-pole multi-throw switch 1 divides the frequency of the signal and then inputs the first radio frequency signal to the signal processing module for signal processing.
In a specific example, the first single-pole multi-throw switch 1 is a single-pole six-throw switch (SP 6T), and it is understood that different radio frequency switches may be selected according to the frequency band to be switched, for example, a single-pole eight-throw switch, a single-pole ten-throw switch, and the like.
From the above, the three pole three throw switch, the first antenna ANT1 and the third antenna ANT3, and the second switching path and the third switching path together realize the CA combined function requirement of the main sets lb+mb, lb+hb, mb+hb, mb+mb.
In a specific example, the CA combination of LB+MB consists essentially of: 1A-20A/1A-28A/1A-5A/1A-8A/3A-20A/3A-28A/3A-5A/3A-8A, etc.
The CA combination of LB+HB mainly includes:
20A-38A/20A-38A/28A-38A/28A-40A/28A-41A/5A-40A/5A-7A/7A-20A/7A-28A/7A-8A/8A-38A/8A-40A/8A-41A/5A-41A, etc.
The CA combination of MB+HB mainly includes:
1A-38A/1A-40A/1A-41A/1A-7A/3A-38A/3A-40A/3A-41A/3A-7A, etc.
The CA combination of MB+MB mainly includes: 1A-3A/2A-4A, etc.
Further, the first switching path includes: a combiner (DIP) and a DIFEM signal switching module.
The first radio frequency switch receives the third radio frequency signal ANT3 with different frequency bands and switches the third radio frequency signal ANT3 to the signal processing module.
The third radio frequency signal is switched to the public end of the combiner through a three-pole three-throw switch, is divided into an ANT_MHB port and an ANT_LB port, which are respectively fed into the DIFEM, and the CA combined function requirements of LB+MB, LB+HB, MB+HB and MB+MB are realized through the combiner and the DIFEM.
In a specific example, the frequency bandwidth that the combiner can pass includes MHB and LB, where MHB includes: band 1/2/3/4/7/34/38/39/40/41/66, and the like, and the LB includes Band5/8/12/13/17/18/19/20/26/28, and the like, wherein the medium-high frequency range is generally 698-960 MHz, and the low frequency range is generally 1710-2690 MHz, and the isolation of the combiner selected in the embodiment to the MHB and the LB is more than 25dB, so that radio frequency signals in different frequency bands are ensured not to be interfered with each other. It can be understood that different combiners are selected to switch the frequency bands of the diversity signals according to actual conditions.
And after the second antenna ANT2 receives the signal and enters the DIFEM signal switching module, the signal is transmitted to the DIFEM signal switching module for signal processing. In a specific example, the DIFEM signal switching module includes a low noise amplifier, a filter, a single pole, multi throw switch, and a radio frequency transceiver.
Therefore, the first radio frequency signal can be switched to the signal processing module for signal processing only through the three-pole three-throw switch, the first single-pole multi-throw switch 1 or through the three-pole three-throw switch, the second single-pole multi-throw switch 2 and the TXM signal switching module, the second radio frequency signal can enter the signal processing module for signal processing only through the second single-pole multi-throw switch 2 and the TXM signal switching module, and the third radio frequency signal can enter the signal processing module for signal processing only through the three-pole three-throw switch, the combiner and the DIFEM signal switching module.
In summary, the present embodiment provides an optimal 4G radio frequency front end antenna switching circuit scheme with CA function based on performance optimization by optimizing radio frequency front end antenna switching circuit combination, so as to reduce debugging difficulty and risk further by using minimum BOM (bill of materials) cost, minimum gsm_hb insertion loss, better LB/MHB insertion loss, lower patch cost and simpler radio frequency front end antenna switching architecture, thereby improving the cost performance of the mobile terminal, ensuring greater advantages in scheme bidding, and reducing development manpower by using a relatively simple radio frequency front end antenna switching circuit.
Example two
The embodiment provides a radio frequency front end antenna switching method, which adopts the antenna switching circuit in the first embodiment, and includes:
the first radio frequency signal is received by the first antenna ANT1 and is switched to a second switching path or a third switching path through the three-pole three-throw switch.
The second radio frequency signal is received through the third antenna ANT3 and is input to the third switching path.
The third radio frequency signal is received by the second antenna ANT2 and is switched to the first switching path through the three-pole three-throw switch.
The first switching path, the second switching path and the third switching path perform frequency band switching on the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then input the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing and receiving.
Specifically, the first radio frequency signal is received by the first antenna ANT1, is switched to the first single-pole multi-throw switch 1 through a three-pole three-throw switch, and is transmitted to the signal processing module for signal processing by the first single-pole multi-throw switch 1.
Or after being received by the first antenna ANT1 and passing through a three-pole three-throw switch, the first radio frequency signal is transmitted to the signal processing module for signal processing after passing through the second single-pole multi-throw switch 2 and the TXM signal switching module.
Further specifically, the third radio frequency signal is received through the second antenna ANT2, and is switched to a combiner through a three-pole three-throw switch, the combiner switches the third radio frequency signal frequency band to the DIFEM signal switching module, and the DIFEM signal switching module switches the third radio frequency signal to the signal processing module.
In addition, the second radio frequency signal is received through the third antenna ANT3, and is switched to the signal processing module for signal processing through the second single pole multi-throw switch 2 and the TXM signal switching module.
In a specific example, when the main set CA of the intermediate frequency (MB) and the low frequency (LB) and the main set CA of the high frequency (HB) and the LB need to be implemented, the intermediate frequency (MB) and the low frequency (LB) signals are received through the first antenna ANT1, transferred to the second switching path through the three-pole three-throw switch, and the low frequency signals are received through the first antenna ANT1, transferred to the third switching path through the three-pole three-throw switch, respectively.
When the combination of the main set CA with the intermediate frequency and the high frequency is needed, the first antenna ANT1 receives the intermediate frequency signal, and is switched to the second switching path after passing through the three-pole three-throw switch, and the third antenna ANT3 receives the high frequency signal and is switched to the third switching path.
Since the first radio frequency signal and the second radio frequency signal in this example may be main set signals of medium and low frequencies, it can be seen that the CA combination implemented is not limited to the above-mentioned CA combination, nor is the manner of implementation limited thereto.
In this example. The switching of the first antenna ANT1 and the second antenna ANT2 is realized by a three-pole three-throw switch. After the antenna switching, the first antenna ANT1 may be a diversity antenna, and the second antenna ANT2 may be a main antenna, so as to implement a TAS or ASDiv function. ASDiv (antenna main diversity channel switching) and TAS (MTK intelligent antenna switching technology) can be switched by a three-pole three-throw switch, so that an antenna with better antenna performance can be selected, and weak signal scenes of a mobile phone, such as strength of a dead hold signal, can be enhanced.
Further specifically, after the first radio frequency signal is subjected to signal processing by the signal processing module, the first radio frequency signal is transmitted to the first antenna ANT1 to be transmitted through the TXM signal switching module and the second single-pole multi-throw switch 2;
or to the three pole, three throw switch via the first single pole, multi throw switch 1 and switched by the three pole, three throw switch to the first antenna ANT1 for transmission.
Referring to fig. 5, a space layout design diagram of an antenna on a terminal device is shown, so that various downlink CA combining requirements can be realized by using an antenna disassembling scheme, and cost is saved. The first antenna ANT1 and the third antenna ANT3 include: the space isolation requirements of the first antenna ANT1 and the second antenna ANT2 are highest in the GSM/WCDMA/LTE system.
Specifically, whether the first antenna ANT1 and the second antenna ANT2 are switched is determined by the signal processing module according to the signal strengths received by the first antenna ANT1 and the second antenna ANT 2.
The first antenna ANT1 defaults to a main set antenna, the second antenna ANT2 defaults to a diversity antenna, and when the signal intensity received by the first antenna ANT1 is smaller than a set value, the first antenna ANT1 and the second antenna ANT2 automatically realize switching, namely: the first antenna ANT1 is switched to a diversity antenna, and the second antenna ANT2 is switched to a main set antenna.
The technical effects that can be achieved by the radio frequency front end antenna switching method in this embodiment are consistent with those that can be achieved by the radio frequency front end antenna switching circuit provided in the first embodiment, and will not be described in detail here.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
Claims (16)
1. A radio frequency front end antenna switching circuit, comprising: the antenna comprises a first antenna, a second antenna, a third antenna, a three-pole three-throw switch, a signal processing module, a first switching path, a second switching path and a third switching path;
a first radio frequency signal is received through the first antenna and is switched to the second switching path or the third switching path through the three-pole three-throw switch;
the first radio frequency signal is also transmitted through the first antenna;
the second radio frequency signal is received through the third antenna and transmitted to the third switching path;
the third radio frequency signal is received through the second antenna and is switched to the first switching path through the three-pole three-throw switch;
the first switching path, the second switching path and the third switching path switch the frequency ranges of the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then switch the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing.
2. The radio frequency front-end antenna switching circuit of claim 1, wherein the first switching path comprises: a combiner and a DIFEM signal switching module;
the third radio frequency signal is switched to the combiner through the three-pole three-throw switch, and after the combiner and the DIFEM signal switching module switch the signal of the third radio frequency signal, the third radio frequency signal is transmitted to the signal processing module for signal processing.
3. The rf front-end antenna switching circuit of claim 2, wherein the combiner switches the third rf signal to a medium-high frequency signal and a low frequency signal.
4. The RF front-end antenna switching circuit of claim 2,
the DIFEM signal switching module comprises a first radio frequency switch;
the first radio frequency switch receives the third radio frequency signals of different frequency bands and switches the third radio frequency signals to the signal processing module.
5. The radio frequency front-end antenna switching circuit of claim 1, wherein the second switching path comprises: a first single pole, multi-throw switch;
the first radio frequency signal is switched to the first single-pole multi-throw switch through the three-pole three-throw switch, and the first single-pole multi-throw switch transmits the first radio frequency signal to the signal processing module for signal processing.
6. The frequency front-end antenna switching circuit of claim 5, wherein the first single-pole, multi-throw switch comprises a single-pole, six-throw switch, a single-pole, eight-throw switch, or a single-pole, ten-throw switch.
7. The radio frequency front-end antenna switching circuit of claim 1, wherein the third switching path comprises: a second single pole multiple throw switch and a TXM signal switching module;
and after the first radio frequency signal and the second radio frequency signal are subjected to signal switching by the second single-pole multi-throw switch and the TXM signal switching module, the signals are transmitted to the signal processing module for signal processing.
8. The radio frequency front end antenna switching circuit of claim 7, wherein said second single pole, multi-throw switch comprises a single pole, double throw switch;
the first radio frequency signal is switched to the single-pole double-throw switch through the three-pole three-throw switch, and the single-pole double-throw switch transmits the first radio frequency signal to the signal processing module for signal processing.
9. The frequency front-end antenna switching circuit of claim 7, wherein the third switching path further comprises a double pole double throw switch;
and after the first radio frequency signal and the second radio frequency signal are subjected to signal switching through the double-pole double-throw switch and the TXM signal switching module, the signals are transmitted to the signal processing module for signal processing.
10. The RF front-end antenna switching circuit of claim 7,
the TXM signal switching module comprises a second radio frequency switch;
the second radio frequency switch receives the first radio frequency signal and the second radio frequency signal with different frequency bands, and inputs the first radio frequency signal and the second radio frequency signal to the signal processing module for signal processing.
11. A radio frequency front end antenna switching method employing the radio frequency front end antenna switching circuit of any of claims 1-10, the method comprising:
the first radio frequency signal is received through the first antenna and is switched to the second switching path or the third switching path through the three-pole three-throw switch;
the second radio frequency signal is received through the third antenna and transmitted to the third switching path;
the third radio frequency signal is received through the second antenna and is switched to the first switching path through the three-pole three-throw switch;
the first switching path, the second switching path and the third switching path switch the frequency ranges of the first radio frequency signal, the second radio frequency signal and the third radio frequency signal, and then switch the first radio frequency signal, the second radio frequency signal and the third radio frequency signal to a signal processing module for signal processing.
12. The method for switching a radio frequency front end antenna of claim 11,
the first radio frequency signal is received by the first antenna, is switched to a first single-pole multi-throw switch through a three-pole three-throw switch, and is transmitted to the signal processing module for signal processing through the first single-pole multi-throw switch;
or after the first antenna receives the signal, the signal is transmitted to the signal processing module for signal processing after passing through the three-pole three-throw switch and passing through the second single-pole multi-throw switch and the TXM signal switching module.
13. The method for switching a radio frequency front end antenna of claim 12,
the third radio frequency signal is received through the second antenna, and is switched to the combiner through the three-pole three-throw switch, the combiner switches the third radio frequency signal frequency band to the DIFEM signal switching module, and the DIFEM signal switching module switches the third radio frequency signal to the signal processing module.
14. The method for switching a radio frequency front end antenna of claim 12,
and the second radio frequency signal is received through the third antenna, and is switched to the signal processing module for signal processing through a second single-pole multi-throw switch and TXM signal switching module.
15. The method for switching a radio frequency front end antenna of claim 12,
after the first radio frequency signal is subjected to signal processing by the signal processing module, the first radio frequency signal is transmitted to the first antenna to be transmitted through the TXM signal switching module and the second single-pole multi-throw switch;
or via a first single pole, multiple throw switch to the three pole, three throw switch and through the three pole, three throw switch to the first antenna transmit.
16. The method for switching a radio frequency front end antenna of claim 11,
the first antenna and the second antenna can be a main set antenna or a diversity antenna, and the third antenna is a receiving antenna of a side CA path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311056417.5A CN117060951A (en) | 2023-08-22 | 2023-08-22 | Radio frequency front-end antenna switching circuit and switching method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311056417.5A CN117060951A (en) | 2023-08-22 | 2023-08-22 | Radio frequency front-end antenna switching circuit and switching method |
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| Publication Number | Publication Date |
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| CN117060951A true CN117060951A (en) | 2023-11-14 |
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| CN202311056417.5A Pending CN117060951A (en) | 2023-08-22 | 2023-08-22 | Radio frequency front-end antenna switching circuit and switching method |
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| Country | Link |
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| CN (1) | CN117060951A (en) |
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