Antenna circuit, antenna system and vehicle
By introducing a filtering and amplification module into the antenna circuit for multi-stage filtering and amplification processing, the problem of saturation blocking of polarized signals is solved, the reception sensitivity and gain are improved, and high-precision positioning is achieved in the full frequency band.
Patent Information
- Application Number
- CN202422116519.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-07-11
- Estimated Expiration
- 2034-08-29
AI Technical Summary
Polarized signals tend to cause saturation blockage during processing overshoot, reducing reception sensitivity.
The filtering and amplification module is adopted, including at least one filtering and amplifying branch, and the polarized signal is filtered and amplified. Through multi-stage filtering and amplification processing, the out-of-band signal suppresses the in-band signal and prevents the amplifier from saturating.
The reception sensitivity of polarized signals is improved, the gain is increased to more than 40DB, and high-precision positioning is achieved in the entire frequency band to prevent in-band signal blocking.
Smart Images
Figure CN223093769U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of electronic technology, and in particular, to an antenna circuit, an antenna system, and a vehicle. Background Art
[0002] In an antenna circuit, during the processing of overshoot of a polarization signal, saturation blocking is likely to occur, reducing the receiving sensitivity.
[0003] In view of this, there is an urgent need to provide an antenna circuit, an antenna system, and a vehicle to improve the receiving sensitivity of the polarization signal. Summary of the Utility Model
[0004] Embodiments of the present application provide an antenna circuit, an antenna system, and a vehicle, which improve the receiving sensitivity of the polarization signal to at least partially solve the above technical problems.
[0005] To achieve the above object, according to the first aspect of the present application, an antenna circuit is provided. The antenna circuit includes an antenna module and a filtering and amplifying module. The antenna module is configured to output a corresponding polarization signal. The filtering and amplifying module is connected to the antenna module. The filtering and amplifying module includes at least one filtering and amplifying branch, and each filtering and amplifying branch is configured to filter and amplify the polarization signal.
[0006] Optionally, the filtering and amplifying branch includes at least one filter and at least one amplifier. The at least one filter and the at least one amplifier are connected in series. The input end of one of the filters is connected to the output end of the antenna module, and the output end of one of the amplifiers is configured to output the filtered and amplified polarization signal.
[0007] Optionally, the filtering and amplifying branch includes a first filter and a first amplifier. The input end of the first filter is connected to the output end of the antenna module, the output end of the first filter is connected to the input end of the first amplifier, and the output end of the first amplifier is configured to output the filtered and amplified polarization signal.
[0008] Optionally, the filtering and amplifying branch further includes a second amplifier. The input end of the second amplifier is connected to the output end of the first amplifier, and the output end of the second amplifier is configured to output the filtered and amplified polarization signal.
[0009] Optionally, the filtering and amplifying branch further includes a second filter, and the second filter is connected between the first amplifier and the second amplifier.
[0010] Optionally, the filtering and amplifying branch further includes a third amplifier. The input end of the third amplifier is connected to the output end of the second filter, and the output end of the third amplifier is configured to output the filtered and amplified polarization signal.
[0011] Optionally, the filtering and amplifying branch further includes a third filter, which is connected between the second amplifier and the third amplifier.
[0012] Optionally, the filtering and amplifying module includes a plurality of filtering and amplifying branches. In the same filtering and amplifying branch, the frequency band range for filtering the polarization signal is the same; and in different filtering and amplifying branches, the frequency band ranges for filtering the polarization signal by each filtering and amplifying branch are different.
[0013] Optionally, the filtering and amplifying module includes a plurality of filtering and amplifying branches. The antenna circuit further includes a signal synthesizer, a coaxial cable, an inductor, and a power supply. Each input end of the signal synthesizer is respectively connected to the output ends of all the filtering and amplifying branches; the central conductor of the coaxial cable is connected to the output end of the signal synthesizer and the global positioning baseband modem, and the shielding layer of the coaxial cable is connected to the grounding end; one end of the inductor is connected to the central conductor; the output end of the power supply is connected to each filtering and amplifying branch to provide a corresponding operating voltage.
[0014] Optionally, the antenna module includes a quadrature right-hand circularly polarized antenna and a quadrature bridge. The quadrature right-hand circularly polarized antenna is used to output a quadrature signal; the quadrature bridge is connected to the quadrature right-hand circularly polarized antenna, and the quadrature bridge is used to generate a polarization signal according to the quadrature signal, and the polarization signal is a right-hand circularly polarized signal.
[0015] According to a second aspect of the present application, there is provided an antenna system, which includes the above-mentioned antenna circuit.
[0016] According to a third aspect of the present application, there is provided a vehicle, which includes the above-mentioned antenna circuit.
[0017] In the antenna circuit, antenna system, and vehicle according to the embodiments of the present application, since the filtering and amplifying module includes at least one filtering and amplifying branch, and each filtering and amplifying branch is used to filter and amplify the polarization signal, the polarization signal can be filtered before amplification, improving the situation where amplification is prone to saturation and resulting in loss of amplification gain, thereby improving the receiving sensitivity.
[0018] Other features and advantages of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0020] To more fully understand the present application and its beneficial effects, the following description will be made in conjunction with the accompanying drawings, where the same reference numerals in the following description represent the same parts.
[0021] Figure 1 is a schematic block diagram of an antenna circuit provided in an exemplary embodiment of the present disclosure;
[0022] Figure 2 is a schematic circuit diagram of an antenna circuit provided in an exemplary embodiment of the present disclosure.
[0023] Description of reference numerals:
[0024] 100, antenna module; 110, four-phase right-handed circularly polarized antenna; 120, four-phase bridge;
[0025] 200, filter amplification module; 210, filter amplification branch; 211, first filter amplification branch; 212, second filter amplification branch;
[0026] 300, signal synthesizer;
[0027] 400, coaxial cable;
[0028] 500, global positioning baseband modem. Detailed implementation manners
[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present application.
[0030] The present application provides an antenna circuit. Please refer to Figure 1 and Figure 2 , the antenna circuit includes an antenna module 100 and a filter amplification module 200. The antenna module 100 is used to output a corresponding polarization signal; the filter amplification module 200 is connected to the antenna module 100. The filter amplification module 200 includes at least one filter amplification branch 210, and each filter amplification branch 210 is used to filter and amplify the polarization signal.
[0031] It can be understood that for the antenna circuit in the embodiment of the present application, since the filter amplification module 200 includes at least one filter amplification branch 210, and each filter amplification branch 210 is used to filter and amplify the polarization signal, the polarization signal can be filtered before amplification, improving the situation where amplification is prone to saturation and resulting in loss of amplification gain, thereby improving the reception sensitivity.
[0032] It should be noted that when the filtering and amplifying module 200 includes a filtering and amplifying branch 210, the signal synthesizer 300 can be omitted, and the output end of a filtering and amplifying branch 210 can be directly connected to the central conductor of the coaxial cable 400.
[0033] In one embodiment, as Figure 2 shown, the filtering and amplifying branch 210 includes at least one filter and at least one amplifier. At least one filter is connected in series with at least one amplifier. The input end of one of the filters is connected to the output end of the antenna module 100, and the output end of one of the amplifiers is used to output the polarized signal after filtering and amplification.
[0034] It should be noted that the filter is connected in series in the front stage of at least a part of the amplifiers. As the number of filters increases, the receiving sensitivity can be gradually improved. As the number of amplifiers increases, the gain of the polarized signal can be gradually increased.
[0035] In one embodiment, as Figure 2 shown, the filtering and amplifying branch 210 includes a first filter FL1 and a first amplifier OP1. The input end of the first filter FL1 is connected to the output end of the antenna module 100, the output end of the first filter FL1 is connected to the input end of the first amplifier OP1, and the output end of the first amplifier OP1 is used to output the polarized signal after filtering and amplification.
[0036] It should be noted that the first filter FL1 can be filter FL11 or filter FL12. The first amplifier OP1 can be amplifier OP11 or amplifier OP12.
[0037] In one embodiment, as Figure 2 shown, the filtering and amplifying branch 210 further includes a second amplifier OP2. The input end of the second amplifier OP2 is connected to the output end of the first amplifier OP1, and the output end of the second amplifier OP2 is used to output the polarized signal after filtering and amplification.
[0038] It should be noted that the second amplifier OP2 can be amplifier OP21 or amplifier OP22. The filtering and amplifying branch 210 of this embodiment can include one filter and two amplifiers, so as to improve the gain of the polarized signal while saving one filter.
[0039] In one embodiment, as Figure 2 shown, the filtering and amplifying branch 210 further includes a second filter FL2. The second filter FL2 is connected between the first amplifier OP1 and the second amplifier OP2.
[0040] It should be noted that the second filter FL2 can be filter FL21 or filter FL22. In this embodiment, the second filter FL2 is connected in series before the second amplifier OP2, which can improve the situation that the second amplifier OP2 is prone to saturation and lose amplification gain, thereby improving the receiving sensitivity.
[0041] In one of the embodiments, as Figure 2 shown, the filter amplification branch 210 further includes a third amplifier OP3. The input end of the third amplifier OP3 is connected to the output end of the second filter FL2, and the output end of the third amplifier OP3 is used to output the polarized signal after filtering and amplification.
[0042] It should be noted that the third amplifier OP3 can be amplifier OP31 or amplifier OP32. The filter amplification branch 210 of this embodiment can include two filters and three amplifiers, so as to further improve the gain of the polarized signal while saving one filter.
[0043] In one of the embodiments, as Figure 2 shown, the filter amplification branch 210 further includes a third filter FL3. The third filter FL3 is connected between the second amplifier OP2 and the third amplifier OP3.
[0044] It should be noted that the third filter FL3 can be filter FL31 or filter FL32. In this embodiment, the third filter FL3 is connected in series before the third amplifier OP3, which can improve the situation that the third amplifier OP3 is prone to saturation and lose amplification gain, thereby improving the receiving sensitivity.
[0045] In one of the embodiments, as Figure 2 shown, the filter amplification module 200 includes a plurality of filter amplification branches 210. In the same filter amplification branch 210, the frequency band range for filtering the polarized signal is the same; and in different filter amplification branches 210, the frequency band ranges for filtering the polarized signal by each filter amplification branch 210 are different.
[0046] It should be noted that in this embodiment, the filter amplification module 200 includes two filter amplification branches 210, namely the first filter amplification branch 211 and the second filter amplification branch 212. The first filter amplification branch 211 and the second filter amplification branch 212 are connected in parallel.
[0047] Among them, the frequency band range for the first filter amplification branch 211 to filter the polarization signal is 1164 MHz to 1300 MHz. That is to say, each filter in the first filter amplification branch 211 outputs a polarization signal in the range of 1164 MHz to 1300 MHz. The frequency band range for the second filter amplification branch 212 to filter the polarization signal is 1559 MHz to 1610 MHz. That is to say, each filter in the second filter amplification branch 212 outputs a polarization signal in the range of 1559 MHz to 1610 MHz. This can not only achieve high-precision full-band reception of global satellite positioning signals, but also isolate the polarization signals in different frequency bands, prevent in-band signal blocking, and the multi-stage filtering can enhance the suppression effect of out-of-band signals, thereby reducing the suppression of external high-power signals on the polarization signals.
[0048] In other embodiments, the number of filter amplification branches 210 included in the filter amplification module 200 can be more, such as 3, 4, 5, or 6.
[0049] In summary, through multi-stage filtering and multi-stage amplification of the polarization signal in each embodiment of the present application, the suppression of out-of-band signals on in-band signals can be effectively suppressed, the reception sensitivity is improved, and the gain can also be increased to more than 40 dB.
[0050] In one embodiment, as Figure 2 shown, the filter amplification module 200 includes a plurality of filter amplification branches 210. The antenna circuit further includes a signal synthesizer 300, a coaxial cable 400, an inductor L11, and a power supply PW1. Each input end of the signal synthesizer 300 is respectively connected to the output ends of all the filter amplification branches 210; the central conductor of the coaxial cable 400 is connected to the output end of the signal synthesizer 300 and the global positioning baseband modem 500, and the shielding layer of the coaxial cable 400 is connected to the ground terminal GND; one end of the inductor L11 is connected to the central conductor; the input end of the power supply PW1 is connected to the other end of the inductor L11, and the output end of the power supply PW1 is connected to each filter amplification branch 210 to provide a corresponding operating voltage.
[0051] It should be noted that the signal synthesizer 300 can synthesize and process the polarization signals in different frequency bands output by each filter amplification branch 210, and transmit them to the global positioning baseband modem 500 through the coaxial cable 400. The power supply PW1 can also be powered through the coaxial cable 400, and the power supply PW1 powers each amplifier.
[0052] Among them, the output end of the power supply PW1 can include a positive electrode and a negative electrode. The negative electrode is connected to the ground terminal GND, and the positive electrode of the power supply PW1 is connected to the filter amplification branch 210.
[0053] In one embodiment, as Figure 2As shown in the figure, the antenna module 100 includes a four-phase right-handed circularly polarized antenna 110 and a four-phase bridge 120. The four-phase right-handed circularly polarized antenna 110 is used to output four-phase signals; the four-phase bridge 120 is connected to the four-phase right-handed circularly polarized antenna 110, and the four-phase bridge 120 is used to generate a polarized signal according to the four-phase signals, and the polarized signal is a right-handed circularly polarized signal.
[0054] It should be noted that the four-phase right-handed circularly polarized antenna 110 can also be a four-phase right-handed circularly polarized passive antenna. The four-phase bridge 120 can be a four-phase 90° bridge. The four-phase bridge 120 can improve the inherent gain and efficiency of the four-phase right-handed circularly polarized passive antenna.
[0055] In summary, the antenna circuit provided by the present application can achieve full frequency band, high receiving sensitivity, and high-precision positioning. All components in the above antenna circuit adopt automotive-grade components of AEC-100 or AEC-200, that is, components with an operating temperature range of -40° to +105° or above, which are suitable for use in high-temperature environments such as off-road vehicles. The high and low frequencies use a duplexer (or filter) to achieve high isolation and prevent in-band blocking; the three-stage filter achieves high out-of-band suppression, three-stage filtering and three-stage amplification, high gain, and there is a filter in front of each amplifier to prevent saturation blocking.
[0056] The present application also provides an antenna system, and the antenna system includes the above antenna circuit. It can be understood that since the antenna system of the embodiment of the present application includes the above antenna circuit, the filtering and amplification module 200 includes at least one filtering and amplification branch 210, and each filtering and amplification branch 210 is used to filter and amplify the polarized signal, and the polarized signal can be filtered before amplification, which improves the situation that amplification is prone to saturation and results in loss of amplification gain, thereby improving the receiving sensitivity.
[0057] The present application also provides a vehicle, and the vehicle includes the above antenna circuit or antenna system. It can be understood that since the vehicle of the embodiment of the present application includes the above antenna circuit or antenna system, the filtering and amplification module 200 includes at least one filtering and amplification branch 210, and each filtering and amplification branch 210 is used to filter and amplify the polarized signal, and the polarized signal can be filtered before amplification, which improves the situation that amplification is prone to saturation and results in loss of amplification gain, thereby improving the receiving sensitivity.
[0058] In the description of the present application, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of the present application, "a plurality of" means two or more, unless otherwise specifically defined.
[0059] In the above embodiments, the descriptions of the respective embodiments have their own emphases. For parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.
[0060] Among the embodiments, implementation manners and related technical features of the present application, they can be combined and replaced with each other without conflict.
[0061] The above are only the preferred embodiments of the present application, and do not impose any form of limitation on the present application. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still fall within the scope of the technical solution of the present application.
Claims
1. An antenna circuit, characterized in that, The antenna circuit includes: An antenna module for outputting corresponding polarization signals; A filter amplification module connected to the antenna module. The filter amplification module includes at least one filter amplification branch, and each filter amplification branch is used to filter and amplify the polarization signal.
2. The antenna circuit according to claim 1, wherein The filter amplification branch includes at least one filter and at least one amplifier. The at least one filter and the at least one amplifier are connected in series. The input end of one of the filters is connected to the output end of the antenna module, and the output end of one of the amplifiers is used to output the filtered and amplified polarization signal.
3. The antenna circuit according to claim 2, characterized in that, The filter amplification branch includes a first filter and a first amplifier. The input end of the first filter is connected to the output end of the antenna module, the output end of the first filter is connected to the input end of the first amplifier, and the output end of the first amplifier is used to output the filtered and amplified polarization signal.
4. The antenna circuit according to claim 3, characterized in that, The filter amplification branch further includes a second amplifier. The input end of the second amplifier is connected to the output end of the first amplifier, and the output end of the second amplifier is used to output the filtered and amplified polarization signal.
5. The antenna circuit according to claim 4, characterized in that, The filter amplification branch further includes a second filter connected between the first amplifier and the second amplifier.
6. The antenna circuit according to claim 5, wherein The filter amplification branch further includes a third amplifier. The input end of the third amplifier is connected to the output end of the second filter, and the output end of the third amplifier is used to output the filtered and amplified polarization signal.
7. The antenna circuit according to claim 6, wherein The filter amplification branch further includes a third filter connected between the second amplifier and the third amplifier.
8. The antenna circuit according to any one of claims 1-7, characterized in that, The filter amplification module includes a plurality of the filter amplification branches. In the same filter amplification branch, the frequency band range for filtering the polarization signal is the same; and in different filter amplification branches, the frequency band ranges for filtering the polarization signal by each filter amplification branch are different.
9. The antenna circuit according to any one of claims 1-7, characterized in that, The filter amplification module includes a plurality of the filter amplification branches. The antenna circuit further includes: A signal synthesizer, and each input end of the signal synthesizer is respectively connected to the output ends of all the filter amplification branches; A coaxial cable. The central conductor of the coaxial cable is connected to the output end of the signal synthesizer and a global positioning baseband modem, and the shielding layer of the coaxial cable is connected to a grounding end; An inductor, one end of which is connected to the central conductor; A power supply. The input end of the power supply is connected to the other end of the inductor, and the output end of the power supply is connected to each filter amplification branch to provide corresponding working voltages.
10. The antenna circuit according to any one of claims 1-7, characterized in that, The antenna module includes: A four-phase right-hand circularly polarized antenna for outputting four-phase signals; A four-phase bridge connected to the four-phase right-hand circularly polarized antenna. The four-phase bridge is used to generate the polarization signal according to the four-phase signals, and the polarization signal is a right-hand circularly polarized signal.
11. An antenna system, characterized in that, The antenna system includes the antenna circuit according to any one of claims 1-10.
12. A vehicle, characterized in that, The vehicle includes the antenna system according to claim 11.