CN117890937A - Radio frequency front end of satellite navigation system, receiver and electronic equipment - Google Patents
Radio frequency front end of satellite navigation system, receiver and electronic equipment Download PDFInfo
- Publication number
- CN117890937A CN117890937A CN202410296106.4A CN202410296106A CN117890937A CN 117890937 A CN117890937 A CN 117890937A CN 202410296106 A CN202410296106 A CN 202410296106A CN 117890937 A CN117890937 A CN 117890937A
- Authority
- CN
- China
- Prior art keywords
- radio frequency
- band
- frequency
- matching network
- satellite
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009434 installation Methods 0.000 claims abstract description 39
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims description 37
- 238000004891 communication Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 230000010355 oscillation Effects 0.000 claims description 7
- 238000010586 diagram Methods 0.000 description 12
- 238000013461 design Methods 0.000 description 6
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000005070 sampling Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003416 augmentation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Abstract
The invention provides a radio frequency front end, a receiver and electronic equipment of a satellite navigation system.A first output end and a second output end of a power divider are respectively and electrically connected with an input end of a first matching network and an input end of a second matching network; the input end of the acoustic surface filtering duplexer is electrically connected with the output end of the first matching network, and the first output end and the second output end respectively output a first satellite radio frequency signal and a second satellite radio frequency signal; the input end of the band-pass filter is electrically connected with the output end of the second matching network, and the output end outputs a third satellite radio frequency signal; when the band-pass filters with different passband frequency ranges are adopted, the first matching network and the second matching network which correspond to the matching parameters are adopted, the packages of the band-pass filters with different passband frequency ranges are the same and are matched with the band-pass filter installation positions, and the packages of the first matching network and the second matching network with different matching parameters are the same and are matched with the first matching network installation positions and the second matching network installation positions.
Description
Technical Field
The invention relates to the field of satellite navigation, in particular to a radio frequency front end of a satellite navigation system, a receiver and electronic equipment.
Background
Currently, navigation satellite systems mainly include: four global navigation satellite systems (Global Navigation Satellite System, GNSS), two regional satellite navigation systems, and a plurality of satellite-based augmentation systems (Satellite Based Augmentation System, SBAS). The four major global navigation satellite systems include: beidou, GPS (Global Positioning System), GLONASS (GLObal NAvigation Satellite System), galileo. The two regional satellite navigation systems include: the Quasi zenith satellite system of japan (Quasi-Zenith Satellite System, QZSS) and the indian regional navigation satellite system of india (Indian Regional Navigation Satellite System (IRNSS), NAVIC). The numerous satellite navigation signals described above present significant challenges to receiver design, especially for rf front-end signal processing modules.
The prior art shows receivers capable of receiving satellite signals of various navigation satellite systems, however, the design of the analog front end of these receivers still has the problem of high cost.
Disclosure of Invention
Based on the above-mentioned current situation, the main objective of the present invention is to provide a radio frequency front end, a receiver and an electronic device of a satellite navigation system, so as to improve the versatility of the circuit board on the premise of guaranteeing the radio frequency performance of the radio frequency front end.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the radio frequency front end of the satellite navigation system comprises a circuit board, a power divider, a sound meter filtering duplexer, a band-pass filter, a first matching network and a second matching network; the input end of the power divider is electrically connected with the output end of the antenna, the first output end is electrically connected with the input end of the first matching network, and the second output end is electrically connected with the input end of the second matching network; the input end of the acoustic surface filtering duplexer is electrically connected with the output end of the first matching network, the first output end outputs a first satellite radio frequency signal of a first frequency band, and the second output end outputs a second satellite radio frequency signal of a second frequency band; the first frequency band and the second frequency band at least cover satellite communication frequency bands of a plurality of different satellite navigation systems; the input end of the band-pass filter is electrically connected with the output end of the second matching network, and the output end outputs a third satellite radio frequency signal; the frequency band of the third satellite radio frequency signal is different from the first frequency band and the second frequency band; the circuit board is provided with a first matching network installation position, a second matching network installation position and a band-pass filter installation position which are respectively matched with the first matching network, the second matching network and the band-pass filter; the first matching network installation position and the second matching network installation position are the same; when the band-pass filters with different passband frequency ranges are adopted, the first matching network and the second matching network which correspond to the matching parameters are adopted, the packages of the band-pass filters with different passband frequency ranges are the same and are matched with the band-pass filter installation positions, and the packages of the first matching network and the second matching network with different matching parameters are the same and are matched with the first matching network installation positions and the second matching network installation positions.
Preferably, the minimum frequency of the first frequency band is 1166.220MHz, the maximum frequency is 1237.830MHz, and the first frequency band at least covers satellite communication frequency bands of the Beidou satellite navigation system, the GPS satellite navigation system and the Galileo satellite navigation system.
Preferably, the minimum frequency of the second frequency band is 1559.052MHz, the maximum frequency is 1605.886MHz, and the second frequency band at least covers satellite communication frequency bands of the beidou satellite navigation system, the GPS satellite navigation system and the galileo satellite navigation system.
Preferably, the different passband frequency bands of the bandpass filter include: 2483.590 The MHz to 2499.910MHz band, and the 1237.830MHz to 1283.865MHz band.
Preferably, the different passband frequency bands of the bandpass filter further include: 1530.000 The MHz to 1545.000MHz band.
The invention also provides a receiver, which comprises a satellite navigation chip and a radio frequency front end of the satellite navigation system.
Preferably, the satellite navigation chip comprises a radio frequency processing module; the radio frequency processing module comprises a first radio frequency channel, a second radio frequency channel and a third radio frequency channel; the first radio frequency channel receives a first satellite radio frequency signal output from a first output end of the acoustic watch filter duplexer, the second radio frequency channel receives a second satellite radio frequency signal output from a second output end of the acoustic watch filter duplexer, and the third radio frequency channel receives a third satellite radio frequency signal output from an output end of the band-pass filter; the first radio frequency channel comprises a first radio frequency signal processing unit and a first analog-to-digital conversion unit; the local oscillation frequency of the first radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the first frequency band.
Preferably, the second radio frequency channel comprises a second radio frequency signal processing unit and a second analog-to-digital conversion unit; the local oscillation frequency of the second radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the second frequency band.
Preferably, the third radio frequency channel comprises a third radio frequency signal processing unit and a third analog-to-digital conversion unit; the local oscillation frequency of the third radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the passband frequency band of the bandpass filter.
The invention also provides electronic equipment comprising any receiver.
The first matching network and the second matching network with different matching parameters are packaged identically and are matched with the first matching network installation position and the second matching network installation position, in addition, the packages of the band-pass filters with different passband frequency ranges are packaged identically and are matched with the band-pass filter installation positions, when the radio frequency front end is applied to different satellite navigation systems, the radio frequency front end can be formed by installing the first matching network, the second matching network and the band-pass filter with corresponding impedance matching parameters on the circuit board, and the circuit board of the radio frequency front end does not need to be redesigned, so that the universality of the circuit board is improved on the premise of guaranteeing the radio frequency performance of the radio frequency front end, namely the circuit board sharing design of different satellite navigation systems is realized. In addition, the first frequency band and the second frequency band output by the acoustic watch filter duplexer are frequency bands shared by a plurality of different satellite navigation systems, so that the change between the radio frequency front ends of the different satellite navigation systems is minimized through the design of the acoustic watch filter duplexer.
Other advantages of the present invention will be set forth in the description of specific technical features and solutions, by which those skilled in the art should understand the advantages that the technical features and solutions bring.
Drawings
Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. In the figure:
FIG. 1 is a schematic diagram of a satellite navigation system receiver according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a radio frequency front end module of a satellite navigation system receiver according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a satellite navigation system receiver according to another preferred embodiment of the present invention;
FIG. 4 is a schematic diagram of a satellite navigation system receiver according to another preferred embodiment of the invention;
FIG. 5 is a low frequency band (LF) signal distribution of satellite navigation signals;
FIG. 6 is a mid-frequency band (MF) signal distribution of a satellite navigation signal;
fig. 7 shows a high frequency band (HF) signal distribution of a satellite navigation signal.
Detailed Description
The present invention is described below based on examples, but the present invention is not limited to only these examples. In the following detailed description of the present invention, certain specific details are set forth in order to avoid obscuring the present invention, and in order to avoid obscuring the present invention, well-known methods, procedures, flows, and components are not presented in detail.
Moreover, those of ordinary skill in the art will appreciate that the drawings are provided herein for illustrative purposes and that the drawings are not necessarily drawn to scale.
Unless the context clearly requires otherwise, throughout the description and the claims, the words "comprise", "comprising", and the like are to be construed in an inclusive sense as opposed to an exclusive or exhaustive sense; that is, it is the meaning of "including but not limited to".
In the description of the present invention, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
As shown in fig. 1, a schematic diagram of a satellite navigation system receiver in one embodiment, the satellite navigation system includes: the system comprises an antenna, a radio frequency front end and a satellite navigation chip. The satellite navigation chip may be a radio frequency baseband integrated chip. The satellite navigation chip comprises a radio frequency processing module, a baseband processing module and a central processing unit.
The antenna is used for receiving navigation satellite signals in the form of wireless radio frequency signals in free space and outputting the radio frequency signals to the radio frequency front end. The radio frequency front end is used for amplifying, filtering and the like of radio frequency signals and outputting the processed radio frequency signals to the satellite navigation chip. The radio frequency processing module of the satellite navigation chip performs down-conversion on the received radio frequency signal to a low intermediate frequency or zero intermediate frequency analog signal, samples the analog signal into a baseband digital sampling signal, and outputs the baseband digital sampling signal to the baseband processing module. The baseband processing module completes the receiving processing of the navigation satellite signals according to the baseband digital sampling signals, including capturing, tracking, text demodulation and the like of the navigation satellite signals. The central processing unit is a control core of the receiver, and is used for scheduling and configuring the baseband processing module and simultaneously carrying out positioning, speed measurement and time service processing according to the observed quantity reported by the baseband processing module. It will be appreciated that the analog-to-digital converter that samples the analog signal into a baseband digital sampled signal may be disposed in the radio frequency processing module or in the baseband processing module.
Fig. 2 is a schematic diagram of a radio frequency front end module of the satellite navigation system receiver in one embodiment, and fig. 3 is a schematic diagram of the satellite navigation system receiver in one embodiment, where the radio frequency module includes an antenna and a radio frequency front end, the radio frequency front end includes a circuit board (not shown), and a power divider, a Saw filter duplexer (Saw-duplexer), a band pass filter, a first matching network (e.g., L or pi type), and a second matching network (e.g., L or pi type) soldered to the circuit board, where the antenna may also be soldered to the circuit board. The circuit board is provided with an antenna installation position, a power divider installation position, a sound meter filtering duplex installation position, a first matching network installation position, a second matching network installation position and a band-pass filter installation position which are respectively matched with the antenna, the power divider, the sound meter filtering duplex installation position, the first matching network installation position, the second matching network installation position and the band-pass filter installation position; the first matching network installation position and the second matching network installation position are the same, namely the size, the shape and the like are the same.
Specifically, the output end of the antenna is welded on an antenna output bonding pad on the circuit board; the input end, the first output end and the second output end of the power divider are respectively welded on a power divider input pad, a power divider first output pad and a power divider second output pad on the circuit board; the input end and the output end of the first matching network are respectively welded on a first matching network input pad and a first matching network output pad on the circuit board; the input end, the first output end and the second output end of the acoustic surface filter duplexer are respectively welded on an input pad of the acoustic surface filter duplexer, a first output pad of the acoustic surface filter duplexer and a second output pad of the acoustic surface filter duplexer; the input end and the output end of the second matching network are respectively welded on a second matching network input bonding pad and a second matching network output bonding pad on the circuit board; the input end and the output end of the band-pass filter are respectively welded on the input bonding pad of the band-pass filter and the output bonding pad of the band-pass filter.
The input end of the power divider is electrically connected with the output end of the antenna through wiring on the circuit board, the first output end of the power divider is electrically connected with the input end of the first matching network through wiring on the circuit board, and the second output end of the power divider is electrically connected with the input end of the second matching network through wiring on the circuit board; the input end of the acoustic surface filtering duplexer is electrically connected with the output end of the first matching network through wiring on the circuit board, the first output end outputs a first satellite radio frequency signal of a first frequency band, and the second output end outputs a second satellite radio frequency signal of a second frequency band; the first frequency band and the second frequency band at least cover satellite communication frequency bands of a plurality of different satellite navigation systems. The input end of the band-pass filter is electrically connected with the output end of the second matching network through wiring on the circuit board, and the output end outputs a third satellite radio frequency signal; the frequency Band of the third satellite radio frequency signal is different from the first frequency Band and the second frequency Band, for example, the first frequency Band and the second frequency Band are respectively an LFL frequency Band and an MFH frequency Band, and the third frequency Band is any one of an HF frequency Band, an LFH frequency Band and an L-Band frequency Band.
In the invention, a plurality of band-pass filters, a plurality of first matching networks and a plurality of second matching networks are designed. The passband frequency band of each bandpass filter is different to accommodate the use of additional specific frequency bands of different satellite navigation systems (e.g., beidou, GPS, or Gelnas satellite navigation systems). When the band-pass filters with different passband frequency bands are adopted, the first matching network and the second matching network which correspond to the impedance matching parameters are adopted, so that the radio frequency signals output by the power divider can be transmitted to the band-pass filter and the acoustic surface filtering duplexer to the maximum extent. The packages of the band-pass filters with different passband frequency ranges are the same and are matched with the installation positions of the band-pass filters, and the packages of the first matching network and the second matching network with different matching parameters are the same and are matched with the installation positions of the first matching network and the second matching network. For example, when a bandpass filter of a passband frequency band is selected, a second matching network corresponding to the matching parameters needs to be selected, and a first matching network corresponding to the matching parameters needs to be selected. The corresponding relation between each passband frequency band of the bandpass filter and the matching parameters of the first matching network and the matching parameters of the second matching network can be established so as to be used in the production of the radio frequency front end.
The first matching network and the second matching network with different matching parameters are packaged identically and are matched with the first matching network installation position and the second matching network installation position, in addition, the packages of the band-pass filters with different passband frequency ranges are packaged identically and are matched with the band-pass filter installation positions, when the radio frequency front end is applied to different satellite navigation systems, the radio frequency front end can be formed by installing the first matching network, the second matching network and the band-pass filter with corresponding impedance matching parameters on the circuit board, and the circuit board of the radio frequency front end does not need to be redesigned, so that the universality of the circuit board is improved on the premise of guaranteeing the radio frequency performance of the radio frequency front end, namely the circuit board sharing design of different satellite navigation systems is realized. In addition, the first frequency band and the second frequency band output by the acoustic watch filter duplexer are frequency bands shared by a plurality of different satellite navigation systems, so that the change between the radio frequency front ends of the different satellite navigation systems is minimized through the design of the acoustic watch filter duplexer. In some embodiments, the first band satellite navigation signal, the second band satellite navigation signal, and the satellite navigation signal output by the band pass filter are not significantly reduced in power compared to the input signal, and the power spectral density remains substantially unchanged.
In some embodiments, the first frequency band is LFL, the minimum frequency of which is 1166.220MHz, the maximum frequency of which is 1237.830MHz, and the first frequency band covers at least a satellite communication frequency band of the beidou satellite navigation system (e.g., B2a, B2B, B2I signals), a satellite communication frequency band of the GPS satellite navigation system (e.g., L5, L2C signals), a satellite communication frequency band of the galileo satellite navigation system (e.g., E5a, E5B signals), and a satellite communication frequency band of the quasi-zenith satellite system (e.g., L5 signals), and a satellite communication frequency band of the indian regional navigation satellite system (e.g., L5 (I) signals).
In some embodiments, the second frequency band is MFH, which has a minimum frequency of 1559.052MHz and a maximum frequency of 1605.886MHz, and the second frequency band covers at least a satellite communication frequency band of the beidou satellite navigation system (e.g., B1I, B C signals), a satellite communication frequency band of the GPS satellite navigation system (e.g., L1CA, L1C signals), a satellite communication frequency band of the galileo satellite navigation system (e.g., E1 signals), and may further cover a satellite communication frequency band of the quasi-zenith satellite system (e.g., L1CA, L1C, L1S signals).
In some embodiments, the different passband frequency bands of the bandpass filter include: 2483.590 The Band-pass filters designed for the frequency Band of MHz to 2499.910MHz (HF Band), 1237.830MHz to 1283.865MHz (LFH Band) and 1530.000MHz to 1545.000MHz (L-Band), in other words, have three different passband bands, and as before, the Band-pass filter of the corresponding passband Band may be selected according to the satellite navigation system to which the present rf front-end is applied, for example, the Band-pass filter of the frequency Band of 2483.590MHz to 2499.910MHz (HF Band) is selected.
FIG. 4 is a schematic diagram of a satellite navigation system receiver according to a more detailed embodiment, wherein the radio frequency processing module includes a first radio frequency channel, a second radio frequency channel, and a third radio frequency channel; the first radio frequency channel receives a first satellite radio frequency signal output from a first output end of the acoustic watch filter duplexer, the second radio frequency channel receives a second satellite radio frequency signal output from a second output end of the acoustic watch filter duplexer, and the third radio frequency channel receives a third satellite radio frequency signal output from an output end of the band-pass filter.
The first radio frequency channel comprises a first radio frequency signal processing unit and a first analog-to-digital conversion unit (i.e. a first ADC); the second radio frequency channel comprises a second radio frequency signal processing unit and a second analog-to-digital conversion unit (namely a second ADC); the third radio frequency channel comprises a third radio frequency signal processing unit and a third analog-to-digital conversion unit (i.e. a third ADC).
The local oscillation frequency of the first radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the first frequency band, so that the sampling rate of the first analog-to-digital conversion unit can be reduced, and the first analog-to-digital conversion unit with lower performance can be used, so that the generation cost can be reduced.
Similarly, the local oscillator frequency of the second rf signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the second frequency band.
Similarly, the local oscillator frequency of the third radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the passband of the bandpass filter.
The following table 1 is a common satellite navigation system and signals thereof, fig. 5-7 are frequency conditions occupied by each satellite navigation signal, wherein fig. 5 is low frequency band (LF) signal distribution of the satellite navigation signal, fig. 6 is intermediate frequency band (MF) signal distribution of the satellite navigation signal, and fig. 7 is high frequency band (HF) signal distribution of the satellite navigation signal; the frequency band ranges from the lowest 1176.45MHz to the highest 2492.028MHz, and the maximum frequency range required to be considered by the radio frequency front end is 1166.220 MHz-2499.910 MHz in consideration of the signal bandwidth. In order to distinguish the Beidou S frequency band signal and the GPS/QZSS L5 signal, the NavIC S signal is marked as S (I) and the L5 signal is marked as L5 (I).
Table 1 satellite navigation system and signal list
According to fig. 5-7, the satellite navigation signal bands are mainly distributed in 3 regions: LF band region 1166.220MHz to 1283.865MHz, MF band region 1530.000MHz to 1605.886MHz, HF band region 2483.910 MHz to 2499.910MHz. The low-frequency region and the high-frequency region of the LF frequency band region are respectively marked as LFL and LFH, the MF region excluding LBAND is marked as MFH, and the range is 1559.052MHz to 1605.886MHz.
In some embodiments, the insertion loss of the selected power divider is 0.5dB to 0.8dB at 950MHz, the maximum insertion loss of the selected saw filter duplexer output signal at the low frequency end (i.e. the first output end) is 0.81dB, the insertion loss at frequencies lower than 1298.75MHz is smaller, the maximum insertion loss of the output signal at the high frequency end (i.e. the second output end) is 0.81dB, and the insertion loss at frequencies higher than 1525MHz is smaller. Because the satellite navigation system at present does not have corresponding signals in the frequency band range 1298.75 MHz-1525 MHz (between LF and MF), the satellite navigation system receiver generally does not need to receive signals in the frequency band, and the acoustic surface filtering duplexer divides and branches the signals in the frequency band, so that the satellite navigation signals are not lost, and the suppression effect is also achieved on high-frequency noise of the LF frequency band and low-frequency noise of the MF frequency band. In some embodiments, filters may be added to both the input and output of the saw filter diplexer and the power divider to suppress out-of-band noise and harmonic components introduced by device nonlinearities.
The invention also provides an electronic device, such as a mobile terminal, a vehicle-mounted terminal and the like, which comprises any receiver.
Those skilled in the art will appreciate that the above-described preferred embodiments can be freely combined and stacked without conflict. In which the flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to various embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). It should also be noted that in some alternative implementations, the functions noted in the block may occur out of the order noted in the figures, for example, two blocks shown in succession may in fact be executed substantially concurrently or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions. The numbering of the steps herein is for convenience of illustration and reference only and is not intended to limit the order in which the steps are performed, the particular order of execution being determined by the technology itself, and the skilled artisan can determine various allowable, reasonable orders based on the technology itself.
Those skilled in the art will appreciate that the above-described preferred embodiments can be freely combined and stacked without conflict.
It will be understood that the above-described embodiments are merely illustrative and not restrictive, and that all obvious or equivalent modifications and substitutions to the details given above may be made by those skilled in the art without departing from the underlying principles of the invention, are intended to be included within the scope of the appended claims.
Claims (10)
1. The radio frequency front end of the satellite navigation system comprises a circuit board and is characterized by further comprising a power divider, a sound table filtering duplexer, a band-pass filter, a first matching network and a second matching network;
the input end of the power divider is electrically connected with the output end of the antenna, the first output end is electrically connected with the input end of the first matching network, and the second output end is electrically connected with the input end of the second matching network; the input end of the acoustic surface filtering duplexer is electrically connected with the output end of the first matching network, the first output end outputs a first satellite radio frequency signal of a first frequency band, and the second output end outputs a second satellite radio frequency signal of a second frequency band; the first frequency band and the second frequency band at least cover satellite communication frequency bands of a plurality of different satellite navigation systems;
the input end of the band-pass filter is electrically connected with the output end of the second matching network, and the output end outputs a third satellite radio frequency signal; the frequency band of the third satellite radio frequency signal is different from the first frequency band and the second frequency band;
the circuit board is provided with a first matching network installation position, a second matching network installation position and a band-pass filter installation position which are respectively matched with the first matching network, the second matching network and the band-pass filter; the first matching network installation position and the second matching network installation position are the same;
when the band-pass filters with different passband frequency ranges are adopted, the first matching network and the second matching network which correspond to the matching parameters are adopted, the packages of the band-pass filters with different passband frequency ranges are the same and are matched with the band-pass filter installation positions, and the packages of the first matching network and the second matching network with different matching parameters are the same and are matched with the first matching network installation positions and the second matching network installation positions.
2. The radio frequency front end of claim 1, wherein,
the minimum frequency of the first frequency band is 1166.220MHz, the maximum frequency of the first frequency band is 1237.830MHz, and the first frequency band at least covers satellite communication frequency bands of a Beidou satellite navigation system, a GPS satellite navigation system and a Galileo satellite navigation system.
3. The radio frequency front end of claim 1, wherein,
the minimum frequency of the second frequency band is 1559.052MHz, the maximum frequency of the second frequency band is 1605.886MHz, and the second frequency band at least covers satellite communication frequency bands of the Beidou satellite navigation system, the GPS satellite navigation system and the Galileo satellite navigation system.
4. The radio frequency front end of claim 1, wherein,
the different passband frequency bands of the bandpass filter include: 2483.590 The MHz to 2499.910MHz band, and the 1237.830MHz to 1283.865MHz band.
5. The radio frequency front end of claim 4, wherein,
the different passband frequency bands of the bandpass filter further include: 1530.000 The MHz to 1545.000MHz band.
6. A receiver comprising a satellite navigation chip, further comprising a radio frequency front end of a satellite navigation system according to any of claims 1-5.
7. The receiver of claim 6, wherein,
the satellite navigation chip comprises a radio frequency processing module;
the radio frequency processing module comprises a first radio frequency channel, a second radio frequency channel and a third radio frequency channel; the first radio frequency channel receives a first satellite radio frequency signal output from a first output end of the acoustic watch filter duplexer, the second radio frequency channel receives a second satellite radio frequency signal output from a second output end of the acoustic watch filter duplexer, and the third radio frequency channel receives a third satellite radio frequency signal output from an output end of the band-pass filter;
the first radio frequency channel comprises a first radio frequency signal processing unit and a first analog-to-digital conversion unit;
the local oscillation frequency of the first radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the first frequency band.
8. The receiver of claim 7, wherein,
the second radio frequency channel comprises a second radio frequency signal processing unit and a second analog-to-digital conversion unit;
the local oscillation frequency of the second radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the second frequency band.
9. The receiver of claim 7, wherein,
the third radio frequency channel comprises a third radio frequency signal processing unit and a third analog-to-digital conversion unit;
the local oscillation frequency of the third radio frequency signal processing unit is configured to be half of the sum of the minimum frequency and the maximum frequency of the passband frequency band of the bandpass filter.
10. An electronic device comprising a receiver as claimed in any one of claims 6-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410296106.4A CN117890937A (en) | 2024-03-15 | 2024-03-15 | Radio frequency front end of satellite navigation system, receiver and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410296106.4A CN117890937A (en) | 2024-03-15 | 2024-03-15 | Radio frequency front end of satellite navigation system, receiver and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117890937A true CN117890937A (en) | 2024-04-16 |
Family
ID=90644438
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410296106.4A Pending CN117890937A (en) | 2024-03-15 | 2024-03-15 | Radio frequency front end of satellite navigation system, receiver and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117890937A (en) |
-
2024
- 2024-03-15 CN CN202410296106.4A patent/CN117890937A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10101461B2 (en) | Radio frequency circuit structure for implementing function of converting GNSS satellite signal into baseband signal | |
| US8593330B2 (en) | Multichannel, multimode, multifunction L-band radio transceiver | |
| US8120531B2 (en) | Signal processing apparatus for multi-mode satellite positioning system and method thereof | |
| JP4840323B2 (en) | Satellite positioning receiver | |
| CN108872925B (en) | Four-channel multi-frequency-band satellite navigation signal receiver | |
| CN105549038B (en) | L1 and L2 two-band satellite navigation receiver RF front-end circuits | |
| RU2010130164A (en) | NAVIGATION RECEIVER | |
| US8022872B2 (en) | Positioning receiver | |
| CN102916712B (en) | Wireless receiver | |
| WO2008144990A1 (en) | A general configurable rf processing method and system for navigation satellite signal | |
| CN101174840B (en) | Programmable direct RF digitization receiver for multiple RF bands and method thereof | |
| US20160245923A1 (en) | Global navigation satellite system superband processing device and method | |
| US20190146094A1 (en) | Hardware front-end for a gnss receiver | |
| KR101620039B1 (en) | Simultaneous signal receiver with interspersed frequency allocation | |
| Qi et al. | A dual-channel GPS/Compass/Galileo/GLONASS reconfigurable GNSS receiver in 65nm CMOS | |
| WO2008135513A1 (en) | Front-end circuit for satellite navigation system | |
| CN108092682B (en) | HFDL signal receiving and processing device | |
| US10228469B2 (en) | Reception device | |
| CN113037307B (en) | Satellite receiver chip and satellite receiver system | |
| CN112073073B (en) | Radio frequency signal processing method and device for radio frequency receiver | |
| CN117890937A (en) | Radio frequency front end of satellite navigation system, receiver and electronic equipment | |
| KR20060090738A (en) | High-frequency ic and gps receiver | |
| CN111399008B (en) | Multi-mode multi-channel navigation receiving device | |
| CN106291624A (en) | The radio-frequency transmitter of No. two satellite navigation system channel structures of the Big Dipper | |
| CN117724122B (en) | Multi-band GNSS receiver |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication |