CN112882063A - Positioning module and communication equipment - Google Patents
Positioning module and communication equipment Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/015—Arrangements for jamming, spoofing or other methods of denial of service of such systems
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/21—Interference related issues ; Issues related to cross-correlation, spoofing or other methods of denial of service
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Abstract
The application provides a positioning module and a communication device. The positioning module includes: the device comprises a receiving antenna, a first filter, a low noise amplifier, a receiver and an interference signal suppression circuit; a first end of the interference signal suppression circuit is electrically connected with the receiving antenna, a second end of the interference signal suppression circuit is electrically connected with a first end of the first filter, a second end of the first filter is electrically connected with a first end of the low noise amplifier, and a second end of the low noise amplifier is electrically connected with the receiver; the interference signal suppression circuit is configured to suppress an interference signal received in the receive antenna. By the mode, the possibility that interference signals generate second harmonics on the low-noise amplifier is reduced, and the performance of the positioning module is improved.
Description
Technical Field
The application relates to the technical field of communication, in particular to a positioning module and communication equipment.
Background
A GPS (Global Positioning System) Positioning module in an existing communication device generally includes a receiving antenna, a Low Noise Amplifier (LNA), and a receiver. The low noise amplifier is connected between the receiving antenna and the receiver. The low noise amplifier is mainly used for amplifying signals in a transmission channel of a receiving antenna, and the passband range of the low noise amplifier in a general positioning module is as follows: 1550-1615 Mhz, i.e., frequencies within this passband are all allowed to pass.
In the research of the positioning module, the inventor finds that, when a wireless communication module such as LTE (Long Term Evolution) exists in the communication device, part of the LTE B13 signal received by the LTE module is coupled to the transmission path of the receiving antenna of the positioning module, and then enters the positioning module. The LTE B13 signal generates a second harmonic in the lna, and the frequency range of the generated second harmonic can just pass through the lna, which in turn causes the lna to saturate, thereby affecting the performance of the positioning module.
Disclosure of Invention
An object of the embodiments of the present application is to provide a positioning module and a communication device, so as to solve the problem that "a part of signals generated by a wireless communication module may generate a second harmonic on a low noise amplifier, which may further cause saturation of the low noise amplifier and affect performance of the positioning module".
The invention is realized by the following steps:
in a first aspect, an embodiment of the present application provides a positioning module, including: the device comprises a receiving antenna, a first filter, a low noise amplifier, a receiver and an interference signal suppression circuit; a first end of the interference signal suppression circuit is electrically connected with the receiving antenna, a second end of the interference signal suppression circuit is electrically connected with a first end of the first filter, a second end of the first filter is electrically connected with a first end of the low noise amplifier, and a second end of the low noise amplifier is electrically connected with the receiver; the interference signal suppression circuit is configured to suppress an interference signal received in the receive antenna.
In the embodiment of the present application, the positioning module is provided with an interference signal suppression circuit and a first filter. The first filter can filter part of interference signals, and the interference signal suppression circuit can further improve the suppression degree of the interference signals generated by the wireless communication module, so that the interference signals coupled to a transmission channel of a receiving antenna of the positioning module are filtered. By the mode, the possibility that interference signals generate second harmonics on the low-noise amplifier is reduced, and the performance of the positioning module is improved.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit includes: a first capacitor and a first inductor; a first end of the first capacitor is electrically connected with the receiving antenna, and a second end of the first capacitor is electrically connected with a first end of the first filter; the first end of the first inductor is electrically connected with the first end of the first capacitor; the second end of the first inductor is grounded.
In the embodiment of the present application, the interference signal suppression circuit only includes a first capacitor and a first inductor, so as to filter the interference signal. By the mode, materials of the interference signal suppression circuit are saved, cost is saved, the circuit is simple, and circuit area is saved.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit further includes: a second inductor; the first end of the second inductor is electrically connected with the second end of the first capacitor; and the second end of the second inductor is grounded.
In the embodiment of the application, the interference signal suppression circuit comprises two inductors and a capacitor, and the interference signal suppression circuit is a pi-type filter circuit through the connection mode, so that interference signals can be effectively filtered.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit further includes: a second capacitor; the first end of the second capacitor is electrically connected with the second end of the first capacitor; and the second end of the second capacitor is grounded.
In the implementation of the application, the interference signal suppression circuit comprises two inductors and two capacitors, and the interference signal suppression circuit is composed of two LC filter circuits through the connection mode, so that interference signals can be effectively filtered.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit further includes: a third inductor; the first end of the third inductor is electrically connected with the second end of the first capacitor, the first end of the third inductor is also electrically connected with the first end of the first filter, and the second end of the third inductor is electrically connected with the first end of the second capacitor.
In the embodiment of the application, the interference signal suppression circuit comprises three inductors and two capacitors, and the interference signal suppression circuit is composed of a pi-type filter circuit and an LC filter circuit by the connection mode, so that interference signals can be filtered stably and effectively.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the capacitance of the first capacitor is 2 picofarads, the inductance of the first inductor is 3 nanohenries, the inductance of the second inductor is 6.8 nanohenries, the inductance of the third inductor is 6.8 nanohenries, and the capacitance of the second capacitor is 6 picofarads.
In the embodiment of the application, when the interference signal suppression circuit with the capacitance and the inductance of the above values is adopted, the suppression degree of the long-term evolution signal can reach about-80 dB, and further the influence of the long-term evolution signal on the performance of the positioning module is effectively reduced.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit further includes: a third capacitor; the first end of the third capacitor is connected with the first end of the first capacitor; and the second end of the third capacitor is grounded.
In the embodiment of the present application, a third capacitor is further added to the interference signal suppression circuit, and in the connection manner, impedance matching to the interference signal suppression circuit can be achieved by adjusting the capacitance of the third capacitor.
With reference to the technical solution provided by the first aspect, in some possible implementation manners, the interference signal suppression circuit further includes: a third inductor; the first end of the third inductor is electrically connected with the second end of the second capacitor, and the second end of the third inductor is grounded.
With reference to the technical solution provided by the first aspect, in some possible implementations, the positioning module further includes a second filter; the first end of the second filter is connected with the second end of the low noise amplifier, and the second end of the second filter is electrically connected with the receiver.
In the embodiment of the application, the second filter is used for filtering the interference signal in the signal processed by the low noise amplifier, so that the purity of the signal transmitted to the receiver is further ensured.
In a second aspect, an embodiment of the present application further provides a communication device, including: a wireless communication module and a positioning module as provided in an embodiment of the first aspect.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the embodiments of the invention. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and that those skilled in the art can also obtain other related drawings based on the drawings without inventive efforts.
Fig. 1 is a block diagram of a positioning module according to an embodiment of the present disclosure.
Fig. 2 is a schematic structural diagram of a first interference signal suppression circuit according to an embodiment of the present disclosure.
Fig. 3 is a schematic structural diagram of a second interference signal suppression circuit according to an embodiment of the present disclosure.
Fig. 4 is a schematic structural diagram of a third interference signal suppression circuit according to an embodiment of the present disclosure.
Fig. 5 is a schematic structural diagram of a fourth interference signal suppression circuit according to an embodiment of the present application.
Fig. 6 is a diagram of an effect of suppressing a positioning module using an interference signal suppression circuit according to an embodiment of the present application.
Fig. 7 is a schematic structural diagram of a fifth interference signal suppression circuit according to an embodiment of the present disclosure.
Fig. 8 is a block diagram of another positioning module according to an embodiment of the present disclosure.
Fig. 9 is a block diagram of a communication device according to an embodiment of the present disclosure.
Detailed Description
The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.
In view of the problem that the interference signal generated by the wireless communication module, such as the LTE B13 signal, generates the second harmonic in the low noise amplifier, and further saturates the low noise amplifier, thereby affecting the performance of the positioning module, the inventors of the present application have studied and searched to provide the following embodiments to solve the above problem.
To facilitate understanding of the present solution, some terms and technical terms are first explained.
LTE: LTE is a wireless data communication technology standard, is an evolution of 3G (3rd-Generation mobile communication technology), and is a transition between 3G and 4G (the 4th Generation mobile communication technology).
LTE B13: b13 is a 13-channel in the LTE standard, i.e., Band 13, and is mainly used in smart wireless communication devices such as mobile phones. Frequency range of LTE B13: 777MHz to 786.9 MHz.
GPS: the global positioning system is mainly used for realizing positioning of intelligent wireless communication equipment. The GPS frequency range is: 1574.397 MHz-1576.443 MHz.
LNA: the low noise amplifier is used for amplifying signals in a GPS receiving channel, and the pass band range of the low noise amplifier in the positioning module is as follows: 1550-1615 Mhz, the frequencies in the pass band can all pass through.
Second harmonic: the root cause of harmonic generation is due to nonlinear loading. When current flows through a load, it is not linearly related to the applied voltage, and a non-sinusoidal current is formed, thereby generating harmonics. The harmonic frequency is an integral multiple of the fundamental frequency, the harmonics can be distinguished into even and odd harmonics, the 3rd, 5 th, 7 th numbered odd harmonics, and the 2 nd, 4th, 6 th, 8 th numbered even harmonics, for example, the fundamental frequency is 50Hz, the second harmonic is 100Hz, and the third harmonic is 150 Hz. For example, when LTE B13 signals are transmitted to the lna, a second harmonic is generated on the lna, which is a nonlinear load, and the frequency range of the generated second harmonic is: 1554MHz to 1573.8 MHz; the generated second harmonic just can pass through the low noise amplifier.
Saturation of the low noise amplifier: that is, the input energy of the low noise amplifier exceeds the tolerable range, so that the working state of the low noise amplifier is abnormal.
Coupling: the energy of one circuit is transferred (or converted) to the other circuit.
Referring to fig. 1, an embodiment of the present application provides a positioning module 100. The positioning module 100 comprises a receiving antenna 10, an interfering signal suppression circuit 20, a first filter 30, a low noise amplifier 40 and a receiver 50.
A first end of the interference signal suppressing circuit 20 is electrically connected to the receiving antenna 10, and a second end of the interference signal suppressing circuit 20 is electrically connected to the first filter 30. A second terminal of the first filter 30 is electrically connected to a first terminal of a low noise amplifier 40. A second terminal of the low noise amplifier 40 is electrically connected to the receiver.
The first Filter 10 is a surface acoustic wave Filter (SAW Filter). The surface acoustic wave filter is formed by evaporating a metal film on a material substrate with piezoelectric effect, and then forming a pair of interdigital electrodes at two ends respectively by photoetching. When signal voltage is applied to the transmitting transducer, an electric field is formed between the input interdigital electrodes, so that the piezoelectric material generates mechanical vibration (namely ultrasonic waves) and transmits the mechanical vibration to the left side and the right side in the form of ultrasonic waves, and the energy towards the edge side is absorbed by the sound absorption material. At the receiving end, the mechanical vibration is converted into an electric signal by the receiving transducer and then is output by the interdigital electrode.
Of course, in other embodiments, the first filter 10 may also be some conventional filter, and the application is not limited thereto.
The receiving antenna 10, the low noise amplifier 40 and the receiver 50 are conventional components known to those skilled in the art in the positioning module 100, and the structure thereof will not be described herein.
The above-described receiving antenna 10 is mainly used for reception of positioning signals. The interference signal suppression circuit 20 and the first filter 30 are used to filter the interference signal. It should be noted that the filter is a frequency selector, which can pass a specific frequency component in the signal and greatly attenuate other frequency components, but the general filter has a suppression degree of only about-40 db, and cannot completely filter out an interference signal (e.g. LTE B13 signal). Therefore, in the embodiment of the present application, an interference signal suppressing circuit 20 is further connected in series, and the interference signal suppressing circuit 20 is mainly used for filtering the interference signal received by the receiving antenna 10.
In summary, in the embodiment of the present application, the positioning module 100 is provided with an interference signal suppressing circuit 20 and a first filter 10. Part of the interference signals can be filtered by the first filter 10, and the degree of suppression of the interference signals generated by the wireless communication module can be further improved by the interference signal suppression circuit 20, so as to filter the interference signals coupled to the transmission path of the receiving antenna of the positioning module 100. In this way, the possibility of the interference signal generating a second harmonic on the low noise amplifier 40 is reduced, thereby improving the performance of the positioning module 100.
Referring to fig. 2, as an embodiment, the interference signal suppressing circuit 20 includes: a first capacitor C1 and a first inductor L1.
Wherein a first terminal of the first capacitor C1 is electrically connected to the receiving antenna 10, and a second terminal of the first capacitor C1 is electrically connected to a first terminal of the first filter 30.
A first end of the first inductor L1 is electrically connected with a first end of the first capacitor C1; the second terminal of the first inductor L1 is connected to ground.
In the embodiment of the present application, the interference signal suppressing circuit 20 includes only one first capacitor C1 and one first inductor L1, so that the interference signal can be filtered. By the mode, the material of the interference signal suppression circuit 20 is saved, the cost is saved, the circuit is simple, and the circuit area is saved.
Referring to fig. 3, as a second embodiment, the interference signal suppressing circuit 20 further includes: a second inductance L2. That is, a second inductor L2 is added to the interference signal suppressing circuit 20 provided in fig. 2.
The first end of the second inductor L2 is electrically connected to the second end of the first capacitor C2, the first end of the second inductor L2 is also electrically connected to the first end of the first filter 30, and the second end of the second inductor L2 is grounded.
In the embodiment of the present application, the interference signal suppression circuit includes two inductors and a capacitor, and the interference signal suppression circuit 20 is a pi-type filter circuit through the above connection manner, so as to effectively filter the interference signal.
Referring to fig. 4, as a third embodiment, the interference signal suppressing circuit 20 further includes: a second capacitor C2. That is, a second capacitor C2 is added to the interference signal suppressing circuit 20 provided in fig. 3.
A first end of the second capacitor C2 is electrically connected to a second end of the first capacitor C1, and a first end of the second capacitor C2 is also electrically connected to the first filter 30; the second terminal of the second capacitor C2 is connected to ground.
In the implementation of the present application, the interference signal suppression circuit includes two inductors and two capacitors, and in the above connection manner, the interference signal suppression circuit 20 is composed of two LC filter circuits, so that the interference signal can be effectively filtered.
Referring to fig. 5, as a fourth embodiment, the interference signal suppressing circuit 20 further includes: and a third inductance L3. That is, an inductor L3 is added to the interference signal suppression circuit 20 provided in fig. 4.
The first end of the third inductor L3 is electrically connected to the second end of the first capacitor C1, the first end of the third inductor L3 is also electrically connected to the first end of the first filter 30, and the second end of the third inductor L3 is electrically connected to the first end of the second capacitor C2.
In the embodiment of the present application, the interference signal suppression circuit includes three inductors and two capacitors, and in the above connection manner, the interference signal suppression circuit 20 is composed of a pi-type filter circuit and an LC filter circuit (the LC filter circuit includes a second capacitor and a third inductor), so as to stably and effectively filter the interference signal.
Optionally, in other embodiments, the connection manner of the third inductor L3 may also not be limited to the above connection manner, for example, the first end of the third inductor L3 is electrically connected to the second end of the second capacitor C2, and the second end of the third inductor L3 is grounded.
When the interference signal suppression circuit 20 shown in fig. 5 is used to filter the long term evolution signal, the capacitance of the first capacitor C1 is 2 picofarads, the inductance of the first inductor L1 is 3 nanohenries, the inductance of the second inductor L2 is 6.8 nanohenries, the inductance of the third inductor L3 is 6.8 nanohenries, and the capacitance of the second capacitor C2 is 6 picofarads.
Specifically, when the above-described value of the interfering signal suppressing circuit 20 is adopted, the suppressing effect thereof can be referred to fig. 6. As shown in fig. 6, m1, m2, m3 and m4 are marked points representing specific frequencies, where the left graph is the S11 and S22 parameters of the whole circuit design, and the right graph is the S12 parameter, where the S12 parameter represents the suppression degree of different frequency ranges in the whole circuit (where the S parameter refers to a network parameter based on the relationship between incident wave and reflected wave, and is suitable for microwave circuit analysis, and describes a circuit network by the reflected signal of a device port and a signal transmitted from the port to another port). Wherein, m 1-m 3 are 777 MHz-787 MHz, which is the frequency range of the long term evolution signal (LTE B13), m4 is 1.575GHz, which is the working frequency point of GPS, and after the right side graph shows the above interference signal suppression circuit 20, the suppression degree of the long term evolution signal, i.e. the range of m 1-m 3, can reach about-80 dB, which effectively improves the suppression degree of the long term evolution signal, and effectively reduces the influence of the long term evolution signal on the performance of the positioning module.
It is understood that in other embodiments, the value of the capacitance and inductance may be adjusted according to the impedance of a PCB (Printed Circuit Board) in an actual design. For example, in another embodiment, the capacitance of the first capacitor C1 may be 3 picofarads, and the inductance of the first inductor L1 may be 4 nanohenries, and therefore, the specific values of the capacitors and inductors are not limited in this application. Of course, the order of the capacitors and inductors may be determined according to actual situations, and the present application is not limited thereto. It should be noted that, in the above description, the lte signal is used as the interference signal, and in other embodiments, the interference signal generated by other wireless communication modules or in the above frequency range may be filtered by the interference signal suppression circuit 20 provided in the embodiment of the present application.
Alternatively, referring to fig. 7, in order to realize the impedance matching of the interference signal suppression circuit 20, in the embodiment of the present application, the interference signal suppression circuit 20 may include a third capacitor C3. The first end of the third capacitor C3 is electrically connected to the receiving antenna 10, the first end of the third capacitor C3 is also electrically connected to the first end of the first capacitor C1, and the second end of the third capacitor C3 is grounded; the impedance matching to the disturbing signal suppressing circuit 20 can be achieved by adjusting the capacitance of the third capacitor C3.
Referring to fig. 8, optionally, the positioning module 100 further includes: a second filter 60. Wherein a first terminal of the second filter 60 is electrically connected to a second terminal of the low noise amplifier 40, and a second terminal of the second filter 60 is electrically connected to the receiver 50. The second filter 60 is used to filter the interference signals in the signal processed by the low noise amplifier 40, so as to further ensure the purity of the signal transmitted to the receiver 50.
The second filter 60 may be a surface acoustic wave filter, but the present application is not limited thereto.
It is understood that the embodiments of the present application may also provide an interference signal suppression circuit separately. When the interference signal suppression circuit provided by the embodiment of the application is applied to the positioning module, the first end of the interference signal suppression circuit is electrically connected with the receiving antenna of the positioning module, the second end of the interference signal suppression circuit is electrically connected with the first end of the filter of the positioning module, and the second end of the filter is electrically connected with the low noise amplifier of the positioning module.
For the specific structure and connection relationship of the interference signal suppression circuit, reference may be made to the description of the interference signal suppression circuit in the foregoing embodiments, and repeated descriptions are not repeated herein for the sake of avoiding redundancy.
Referring to fig. 9, based on the same inventive concept, an embodiment of the present application further provides a communication device 200, which includes a wireless communication module 202 and the positioning module 100 implemented as described above.
Of course, the processor 201 is also included in the communication device. The processor 201 is electrically connected to the wireless communication module 202 and the positioning module 100, respectively.
The communication device 200 may be, but is not limited to, a mobile phone, a tablet computer, and a navigator. The wireless communication module 202 may be, but is not limited to, an LTE module or a 4G module. The Processor 201 may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
In the embodiment of the present application, the positioning module 100 is provided with an interference signal suppression circuit 20 and a first filter 30. Part of the interference signals can be filtered by the first filter 30, and the degree of suppression of the interference signals generated by the wireless communication module 202 can be further improved by the interference signal suppression circuit 20, so as to filter the interference signals coupled to the transmission path of the receiving antenna of the positioning module 100. In this way, the possibility that the interference signal generates a second harmonic on the low noise amplifier 40 is reduced, thereby improving the performance of the positioning module. At the same time, the communication device 200 including both the wireless communication module 202 and the positioning module 100 is also enabled to provide accurate and stable positioning.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the embodiments provided in the present application, it should be understood that the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some communication interfaces, devices or units, and may be in an electrical, mechanical or other form.
In addition, units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Furthermore, the functional modules in the embodiments of the present application may be integrated together to form an independent part, or each module may exist separately, or two or more modules may be integrated to form an independent part.
In this document, relational terms such as first, second, third, 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.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A positioning module, comprising: the device comprises a receiving antenna, a first filter, a low noise amplifier, a receiver and an interference signal suppression circuit;
a first end of the interference signal suppression circuit is electrically connected with the receiving antenna, a second end of the interference signal suppression circuit is electrically connected with a first end of the first filter, a second end of the first filter is electrically connected with a first end of the low noise amplifier, and a second end of the low noise amplifier is electrically connected with the receiver;
the interference signal suppression circuit is configured to suppress an interference signal received in the receive antenna.
2. The positioning module of claim 1, wherein the jamming signal suppression circuit comprises: a first capacitor and a first inductor;
a first end of the first capacitor is electrically connected with the receiving antenna, and a second end of the first capacitor is electrically connected with a first end of the first filter;
the first end of the first inductor is electrically connected with the first end of the first capacitor; the second end of the first inductor is grounded.
3. The positioning module of claim 2, wherein the jamming signal suppression circuit further comprises: a second inductor;
the first end of the second inductor is electrically connected with the second end of the first capacitor; and the second end of the second inductor is grounded.
4. The positioning module of claim 3, wherein the jamming signal suppression circuit further comprises: a second capacitor;
the first end of the second capacitor is electrically connected with the second end of the first capacitor; and the second end of the second capacitor is grounded.
5. The positioning module of claim 4, wherein the jamming signal suppression circuit further comprises: a third inductor;
the first end of the third inductor is electrically connected with the second end of the first capacitor, the first end of the third inductor is also electrically connected with the first end of the first filter, and the second end of the third inductor is electrically connected with the first end of the second capacitor.
6. The positioning module of claim 5, wherein the capacitance of the first capacitor is 2 picofarads, the inductance of the first inductor is 3 nanohenries, the inductance of the second inductor is 6.8 nanohenries, the inductance of the third inductor is 6.8 nanohenries, and the capacitance of the second capacitor is 6 picofarads.
7. The positioning module of claim 6, wherein the jamming signal suppression circuit further comprises: a third capacitor;
the first end of the third capacitor is connected with the first end of the first capacitor; and the second end of the third capacitor is grounded.
8. The positioning module of claim 4, wherein the jamming signal suppression circuit further comprises: a third inductor;
the first end of the third inductor is electrically connected with the second end of the second capacitor, and the second end of the third inductor is grounded.
9. The positioning module of claim 1, further comprising a second filter;
the first end of the second filter is connected with the second end of the low noise amplifier, and the second end of the second filter is electrically connected with the receiver.
10. A communication device, comprising: a wireless communication module and a positioning module according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110040760.5A CN112882063A (en) | 2021-01-12 | 2021-01-12 | Positioning module and communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110040760.5A CN112882063A (en) | 2021-01-12 | 2021-01-12 | Positioning module and communication equipment |
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| CN112882063A true CN112882063A (en) | 2021-06-01 |
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| CN202110040760.5A Pending CN112882063A (en) | 2021-01-12 | 2021-01-12 | Positioning module and communication equipment |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201360254Y (en) * | 2009-02-23 | 2009-12-09 | 青岛海信移动通信技术股份有限公司 | Interference-suppressing circuit and mobile communication terminal with the circuit |
| CN103166656A (en) * | 2011-12-14 | 2013-06-19 | 英飞凌科技股份有限公司 | System and method for an RF receiver |
| CN203135865U (en) * | 2013-03-20 | 2013-08-14 | 东莞宇龙通信科技有限公司 | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) |
| CN104038456A (en) * | 2014-05-30 | 2014-09-10 | 北京智谷睿拓技术服务有限公司 | Communication method for direct communication between devices and communication nodes |
| CN207021982U (en) * | 2017-06-28 | 2018-02-16 | 惠州Tcl移动通信有限公司 | Gps antenna circuit and its communication terminal |
| CN108881558A (en) * | 2018-07-27 | 2018-11-23 | 华勤通讯技术有限公司 | Mobile terminal and its FM anti-jamming circuit |
| CN109150203A (en) * | 2018-07-13 | 2019-01-04 | 上海移远通信技术股份有限公司 | A kind of antenna switching circuit and antenna system |
-
2021
- 2021-01-12 CN CN202110040760.5A patent/CN112882063A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201360254Y (en) * | 2009-02-23 | 2009-12-09 | 青岛海信移动通信技术股份有限公司 | Interference-suppressing circuit and mobile communication terminal with the circuit |
| CN103166656A (en) * | 2011-12-14 | 2013-06-19 | 英飞凌科技股份有限公司 | System and method for an RF receiver |
| CN203135865U (en) * | 2013-03-20 | 2013-08-14 | 东莞宇龙通信科技有限公司 | Mobile terminal for alleviating interference of LTE (Long Term Evolution) emission in GPS (Global Position System) |
| CN104038456A (en) * | 2014-05-30 | 2014-09-10 | 北京智谷睿拓技术服务有限公司 | Communication method for direct communication between devices and communication nodes |
| CN207021982U (en) * | 2017-06-28 | 2018-02-16 | 惠州Tcl移动通信有限公司 | Gps antenna circuit and its communication terminal |
| CN109150203A (en) * | 2018-07-13 | 2019-01-04 | 上海移远通信技术股份有限公司 | A kind of antenna switching circuit and antenna system |
| CN108881558A (en) * | 2018-07-27 | 2018-11-23 | 华勤通讯技术有限公司 | Mobile terminal and its FM anti-jamming circuit |
Non-Patent Citations (1)
| Title |
|---|
| 张青芳;: "TDD-LTE终端二次谐波的抑制", 电子世界, no. 24 * |
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