CN209787163U - Positioning circuit and terminal - Google Patents
Positioning circuit and terminal Download PDFInfo
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- CN209787163U CN209787163U CN201920954722.9U CN201920954722U CN209787163U CN 209787163 U CN209787163 U CN 209787163U CN 201920954722 U CN201920954722 U CN 201920954722U CN 209787163 U CN209787163 U CN 209787163U
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Abstract
The utility model discloses a positioning circuit and terminal, this positioning circuit includes: a positioning signal receiver, a positioning signal receiving device; the signal input interface of the LNA is connected with a positioning signal receiving device; and the first dual-band-pass filter comprises a first frequency signal output interface and a second frequency signal output interface, the signal input interface of the first dual-band-pass filter is connected with the signal output interface of the LNA, and the first frequency signal output interface and the second frequency signal output interface are respectively connected with the positioning signal receiver. The utility model discloses in the above-mentioned embodiment, the signal input interface through LNA is connected with the positioning signal receiving arrangement, and the signal input interface of first dual band pass filter and LNA's signal output interface connection, first frequency signal output interface and second frequency signal output interface are connected with the positioning signal receiver respectively, have reduced the quantity of wave filter and LNA, reduce the area that occupies PCB.
Description
Technical Field
the utility model relates to the field of communication technology, especially, relate to a positioning circuit and terminal.
background
with the development of communication, smart phones are rapidly developed, and the functions of the smart phones are diversified and the accuracy of the functions of the smart phones affects the life of users. The positioning technology of the mobile phone is one of the indispensable functions of the mobile phone, and the accuracy of positioning affects the experience of the user. In order to improve the outdoor Positioning accuracy of the mobile phone, a Global Positioning System (GPS) dual-antenna mode is currently selected for Circuit design, and is divided into two signals with different frequency ranges of L1 and L5, including two radio frequency paths of the GPS, two antennas and two Low Noise Amplifiers (LNAs), and four filters.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model provides a positioning circuit and terminal to the solution occupies the great problem of PCB area.
In a first aspect, an embodiment of the present invention provides a positioning circuit, including a positioning signal receiver, the positioning circuit further includes:
a positioning signal receiving device;
the signal input interface of the low-noise amplifier is connected with the positioning signal receiving device;
And the first dual-band-pass filter comprises a first frequency signal output interface and a second frequency signal output interface, wherein the signal input interface of the first dual-band-pass filter is connected with the signal output interface of the low-noise amplifier, and the first frequency signal output interface and the second frequency signal output interface are respectively connected with the positioning signal receiver.
In a second aspect, the embodiment of the present invention further provides a terminal, including the above-mentioned positioning circuit.
The utility model discloses an in the above-mentioned embodiment, the signal input interface through low noise amplifier is connected with the positioning signal receiving arrangement to and the signal input interface of first dual band pass filter with low noise amplifier's signal output interface connection, first dual band pass filter's first frequency signal output interface and second frequency signal output interface respectively with the positioning signal receiver is connected, has reduced the quantity of wave filter and low noise amplifier's quantity, reduces the area that occupies PCB, practices thrift the cost.
drawings
in order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
fig. 1 shows one of the schematic circuit diagrams of the positioning circuit of the embodiment of the present invention;
fig. 2 shows a second schematic circuit diagram of the positioning circuit according to the embodiment of the present invention;
fig. 3 is a third schematic circuit diagram of a positioning circuit according to an embodiment of the present invention;
Fig. 4 shows a circuit schematic diagram of a band-stop matched filter circuit according to an embodiment of the present invention;
Description of reference numerals:
1-positioning signal receiver, 2-positioning signal receiving device, 3-Low Noise Amplifier (LNA), 4-first dual band pass filter, 21-first antenna, 22-second antenna, 23-second dual band pass filter, 24-third antenna, 25-third dual band pass filter, 26-fourth antenna, 27-band stop matching filter circuit, 28-broadband filter, L1-first inductor, L2-second inductor, L3-third inductor, L4-fourth inductor, C1-first capacitor, C2-second capacitor, C3-third capacitor.
Detailed Description
exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention can be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
As shown in fig. 1 to 3, the embodiment of the present invention provides a positioning circuit, including a positioning signal receiver 1, the positioning circuit further includes:
a positioning signal receiving device 2;
A low noise amplifier LNA3, a signal input interface of the low noise amplifier LNA3 being connected with the positioning signal receiving apparatus 2;
a first dual band pass filter 4 comprising a first frequency signal output interface and a second frequency signal output interface, wherein the signal input interface of the first dual band pass filter 4 is connected to the signal output interface of the low noise amplifier LNA3, and the first frequency signal output interface and the second frequency signal output interface are respectively connected to the positioning signal receiver 1.
Wherein the first frequency signal output interface outputs signals with frequency range of 1574.397-1576.443 to the positioning signal receiver 1; the second frequency signal output interface outputs signals with the frequency range of 1166.22-1186.68 to the positioning signal receiver 1. The first dual-band pass filter 4 can divide two signals of two frequency ranges transmitted in the same path into two paths of signals to be output, and has a function of filtering out-of-band signals, that is, when a path of a first frequency range signal is passed, out-of-band interference signals of the first frequency range signal are filtered out; when a path of a second frequency range signal is taken, an out-of-band interference signal of the second frequency range signal is filtered; the first dual band pass filter 4 is connected to ground. The low noise amplifier LNA3 may amplify both the signals of the first frequency range and the signals of the second frequency range. The positioning signal receiver 1 may be a GPS receiver.
The utility model discloses in the above-mentioned embodiment, the signal input interface through low noise amplifier LNA3 is connected with the positioning signal receiving arrangement to and the signal input interface of first dual band pass filter with low noise amplifier LNA 3's signal output interface connection, first dual band pass filter's first frequency signal output interface and second frequency signal output interface respectively with the positioning signal receiver connects, has reduced the quantity of wave filter and low noise amplifier LNA 3's quantity, reduces the area that occupies PCB, practices thrift the cost.
As shown in fig. 1, in an embodiment of the present invention, the positioning signal receiving apparatus 2 includes:
a first antenna 21 including a first frequency signal receiving end;
a second antenna 22 including a second frequency signal receiving end;
And a second dual band-pass filter 23, including a first frequency signal input interface and a second frequency signal input interface, wherein the signal output interface of the second dual band-pass filter 23 is connected to the signal input interface of the low noise amplifier LNA3, the first frequency signal input interface is connected to the first frequency signal receiving terminal of the first antenna, and the second frequency signal input interface is connected to the second frequency signal receiving terminal of the second antenna 22.
the first antenna 21 receives signals with a first frequency range of 1574.397-1576.443 through the first frequency signal receiving end and transmits the signals with the first frequency range to the second dual-band pass filter 23; the second antenna 22 receives signals of a second frequency range 1166.22-1186.68 through the second frequency signal receiving end, and transmits the signals of the second frequency range to the second dual band pass filter 23. The difference between the signal in the first frequency range received by the first antenna 21 and the signal in the second frequency range received by the second antenna 22 is about 300M, and the first dual band pass filter 4 and the second dual band pass filter 23 can be set to a level where the suppression degree is below-30 dB in the frequency point range between the first frequency range and the second frequency range, so as to ensure the in-band communication quality.
The second dual-band pass filter 23 can combine two signals in two frequency ranges into one signal for output, and has a function of filtering out-of-band signals, that is, when a path of a first frequency range signal is taken, an out-of-band interference signal of the first frequency range signal is filtered out; when a path of a second frequency range signal is taken, an out-of-band interference signal of the second frequency range signal is filtered; the first dual band pass filter 4 and the second dual band pass filter 23 may be the same device or different devices, and the second dual band pass filter 23 is grounded.
The utility model discloses in the above-mentioned embodiment, the signal input interface through low noise amplifier LNA3 is connected with second dual band pass filter 23 to and first dual band pass filter's signal input interface with low noise amplifier LNA 3's signal output interface connection, first dual band pass filter's first frequency signal output interface and second frequency signal output interface respectively with the locating signal receiver connects, has reduced the quantity of wave filter and low noise amplifier LNA 3's quantity, reduces the area that occupies the PCB, practices thrift the cost.
as shown in fig. 2, in another embodiment of the present invention, the positioning signal receiving apparatus 2 includes:
A third antenna 24 including a third frequency signal receiving terminal;
the third dual-band bandpass filter 25 includes a third frequency signal input interface and a third frequency signal output interface, wherein the third frequency signal input interface is connected to the third frequency signal receiving end of the third antenna 24, and the third frequency signal output interface is connected to the signal input interface of the low noise amplifier LNA 3.
The third antenna 24 receives signals with a first frequency range of 1574.397-1576.443 and signals with a second frequency range of 1166.22-1186.68 through the third frequency signal receiving terminal, and transmits the signals with the second frequency range to the third dual-band bandpass filter 25.
the third dual-band bandpass filter 25 synthesizes two original signals in two frequency ranges into one signal for input and output, the filtering effect of two paths in the third dual-band bandpass filter 25 is unchanged, and out-of-band signals can be filtered out, that is, out-of-band interference signals of the first frequency range signals are filtered when the path of the first frequency range signals in the third dual-band bandpass filter 25 is passed; when an internal path of a second frequency range signal is taken, an out-of-band interference signal of the second frequency range signal is filtered; the third dual-band bandpass filter 25 is grounded.
The utility model discloses in the above-mentioned embodiment, the signal input interface through low noise amplifier LNA3 is connected with third dual-band pass filter 25, third dual-band pass filter 25 the third frequency signal input interface with the third frequency signal receiving terminal of third antenna 24 connects to and the signal input interface of first dual-band pass filter with low noise amplifier LNA 3's signal output interface connection, first dual-band pass filter's first frequency signal output interface and second frequency signal output interface respectively with the positioning signal receiver connects, has reduced the quantity of wave filter, low noise amplifier LNA 3's quantity and the quantity of antenna, reduces the area that occupies PCB, reduce the cost.
As shown in fig. 3, in another embodiment of the present invention, the positioning signal receiving apparatus 2 includes:
A fourth antenna 26 including a fourth frequency signal receiving terminal;
a band-stop matching filter circuit 27;
And the broadband filter 28 comprises a fourth frequency signal input interface and a fourth frequency signal output interface, wherein the fourth frequency signal input interface is connected with the fourth frequency signal receiving end of the fourth antenna 26, and the fourth frequency signal output interface is connected with the signal input interface of the low noise amplifier LNA3 through the band-stop matching filter circuit 27.
The fourth antenna 26 receives signals with a first frequency range of 1574.397-1576.443 and signals with a second frequency range of 1166.22-1186.68 through the fourth frequency signal receiving terminal, and transmits the signals with the second frequency range to the broadband filter 28.
the passband of the wideband filter 28 includes not only the signals in the first frequency range and the signals in the second frequency range, but also the frequency points between the first frequency range and the second frequency range, that is, the passband of the wideband filter 28 includes: 1166.22-1576.443 MHz, signals outside the passband can be filtered, namely interference signals outside 1166.22-1576.443 MHz are filtered; the band-stop matched filter circuit 27 may filter out unwanted signals between the first frequency range and the second frequency range.
As shown in fig. 4, preferably, the band-stop matching filter circuit 27 includes:
A first inductor L1, a first end of the first inductor L1 being connected to the signal input interface of the low noise amplifier LNA 3;
a first capacitor C1 connected in parallel with the first inductor L1;
a second inductor L2, a first terminal of the second inductor L2 being connected to a second terminal of the first inductor L1, a second terminal being connected to the fourth frequency signal output interface of the wideband filter 28;
A second capacitor C2 connected in parallel with the second inductor L2;
a third inductor L3, a first end of the third inductor L3 being connected to a second end of the first inductor L1 and a first end of the second inductor L2, respectively;
A third capacitor C3, a first terminal of the third capacitor C3 is connected to the second terminal of the third inductor L3, and the second terminal is grounded;
And a fourth inductor L4 connected in parallel with the third capacitor C3.
the inductance values of the first inductor L1 and the second inductor L2 are the same, and may be 1.5 nH; the capacitance values of the first capacitor C1, the second capacitor C2 and the third capacitor C3 are the same and can be 10 pF; the third inductor L3 may be 5nH and the fourth inductor L4 may be 2.2 nH. The above values can be set according to circuit requirements. The simulation is performed based on the above values, and if the simulation result is that the second frequency range and the loss of the second frequency range are within the normal range (0dB to 3dB), the values belong to normal values, and the values can be used.
the utility model discloses in the above-mentioned embodiment, the signal input interface through low noise amplifier LNA3 passes through band elimination matched filter circuit 27 with broadband filter 28 connects, broadband filter 28 fourth frequency signal input interface with the fourth frequency signal receiving terminal of fourth antenna 26 connects to and the signal input interface of first dual band pass filter with low noise amplifier LNA 3's signal output interface connection, first frequency signal output interface and the second frequency signal output interface of first dual band pass filter respectively with the positioning signal receiver connects, has reduced the quantity of wave filter, low noise amplifier LNA 3's quantity and the quantity of antenna, reduces the area that occupies PCB, reduce the cost.
the embodiment of the utility model provides a terminal is still provided, include as above positioning circuit.
For convenience of description, a mobile phone may be used as a specific example of the terminal device of the present invention for description, and a person skilled in the art can understand that, besides the mobile phone is used as the terminal device, the present invention is also applicable to other terminal devices with a display screen, such as a tablet computer, an e-book reader, a motion picture Experts Group Audio Layer 3 (MP 3) player, a motion picture Experts compression standard Audio Layer 4 (MP 4) player, a laptop portable computer, a car-mounted computer, a desktop computer, a set-top box, an intelligent television, a wearable device, and so on.
The utility model discloses an in the above-mentioned embodiment, the signal input interface through low noise amplifier LNA3 is connected with the positioning signal receiving arrangement to and the signal input interface of first dual band pass filter with low noise amplifier LNA 3's signal output interface connection, first frequency signal output interface and the second frequency signal output interface of first dual band pass filter respectively with the positioning signal receiver connects, has reduced the quantity of wave filter and/or the quantity of antenna and/or the quantity of low noise amplifier LNA3, reduces the area that occupies PCB, practices thrift the cost.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the invention.
finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The foregoing is directed to the preferred embodiments of the present invention, and it will be understood by those skilled in the art that various changes and modifications may be made without departing from the principles of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
Claims (10)
1. A positioning circuit comprising a positioning signal receiver (1), characterized in that it further comprises:
A positioning signal receiving device (2);
The signal input interface of the low-noise amplifier (3) is connected with the positioning signal receiving device (2);
And the first dual-band-pass filter (4) comprises a first frequency signal output interface and a second frequency signal output interface, wherein the signal input interface of the first dual-band-pass filter (4) is connected with the signal output interface of the low noise amplifier (3), and the first frequency signal output interface and the second frequency signal output interface are respectively connected with the positioning signal receiver (1).
2. the positioning circuit according to claim 1, characterized in that the positioning signal receiving means (2) comprises:
A first antenna (21) comprising a first frequency signal receiving end;
A second antenna (22) comprising a second frequency signal receiving end;
And the second dual-band-pass filter (23) comprises a first frequency signal input interface and a second frequency signal input interface, wherein the signal output interface of the second dual-band-pass filter (23) is connected with the signal input interface of the low noise amplifier (3), the first frequency signal input interface is connected with the first frequency signal receiving end of the first antenna, and the second frequency signal input interface is connected with the second frequency signal receiving end of the second antenna (22).
3. The positioning circuit according to claim 1, characterized in that the positioning signal receiving means (2) comprises:
A third antenna (24) comprising a third frequency signal receiving end;
And the third dual-frequency band-pass filter (25) comprises a third frequency signal input interface and a third frequency signal output interface, wherein the third frequency signal input interface is connected with a third frequency signal receiving end of the third antenna (24), and the third frequency signal output interface is connected with a signal input interface of the low-noise amplifier (3).
4. The positioning circuit according to claim 1, characterized in that the positioning signal receiving means (2) comprises:
a fourth antenna (26) comprising a fourth frequency signal receiving end;
a band-stop matched filter circuit (27);
And the broadband filter (28) comprises a fourth frequency signal input interface and a fourth frequency signal output interface, wherein the fourth frequency signal input interface is connected with a fourth frequency signal receiving end of the fourth antenna (26), and the fourth frequency signal output interface is connected with the signal input interface of the low noise amplifier (3) through the band-stop matching filter circuit (27).
5. the positioning circuit according to claim 4, characterized in that the band-stop matched filter circuit (27) comprises:
a first inductor (L1), a first end of the first inductor (L1) being connected with a signal input interface of the low noise amplifier (3);
a first capacitor (C1) connected in parallel with the first inductor (L1);
a second inductor (L2), a first terminal of the second inductor (L2) being connected to a second terminal of the first inductor (L1), the second terminal being connected to the fourth frequency signal output interface of the wideband filter (28);
A second capacitor (C2) connected in parallel with the second inductor (L2);
a third inductor (L3), a first terminal of the third inductor (L3) being connected to the second terminal of the first inductor (L1) and the first terminal of the second inductor (L2), respectively;
a third capacitor (C3), a first terminal of the third capacitor (C3) being connected to the second terminal of the third inductor (L3), a second terminal being connected to ground;
A fourth inductance (L4) connected in parallel with the third capacitance (C3).
6. the positioning circuit according to claim 5, wherein the first inductor (L1) has the same inductance value as the second inductor (L2), and the first capacitor (C1), the second capacitor (C2) and the third capacitor (C3) have the same capacitance value.
7. The positioning circuit according to claim 4, wherein the passband range of the wideband filter (28) comprises: 1166.22-1576.443 MHz.
8. the positioning circuit according to claim 1, characterized in that the positioning signal receiver (1) is a global positioning system receiver.
9. a terminal, characterized in that it comprises a positioning circuit according to any one of claims 1 to 8.
10. The terminal according to claim 9, characterized in that the terminal comprises: at least one of a cell phone, a tablet, an e-book reader, an MP3 player, an MP4 player, a laptop, a car computer, a desktop computer, a set-top box, a smart tv, a wearable device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920954722.9U CN209787163U (en) | 2019-06-24 | 2019-06-24 | Positioning circuit and terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920954722.9U CN209787163U (en) | 2019-06-24 | 2019-06-24 | Positioning circuit and terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209787163U true CN209787163U (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920954722.9U Active CN209787163U (en) | 2019-06-24 | 2019-06-24 | Positioning circuit and terminal |
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| Country | Link |
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| CN (1) | CN209787163U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708856A (en) * | 2021-08-13 | 2021-11-26 | 苏州翼凯通信科技有限公司 | Hand-held type basic station information and signal strength collection system |
| CN114047532A (en) * | 2022-01-13 | 2022-02-15 | 龙旗电子(惠州)有限公司 | Double-frequency-band processing circuit and positioning equipment |
-
2019
- 2019-06-24 CN CN201920954722.9U patent/CN209787163U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113708856A (en) * | 2021-08-13 | 2021-11-26 | 苏州翼凯通信科技有限公司 | Hand-held type basic station information and signal strength collection system |
| CN114047532A (en) * | 2022-01-13 | 2022-02-15 | 龙旗电子(惠州)有限公司 | Double-frequency-band processing circuit and positioning equipment |
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