Airborne antenna adaptation module

Abstract

The invention discloses an airborne antenna adaptation module which comprises a first PIN switch, a first amplitude limiter, a first filter, a first amplifier and a first antenna port signal channel of a first power divider which are electrically connected in sequence. The second antenna port signal channel is electrically connected with a second PIN switch, a second amplitude limiter, a second filter, a first fixed attenuator and a second amplifier in sequence; the first PIN switch and the second PIN switch are both single-pole double-throw switches. The first end, the second end and the third end of the first PIN switch are correspondingly and electrically connected with the first antenna, the input end of the first antenna port signal channel and the output end of the power signal channel. And the first end, the second end and the third end of the second PIN switch are correspondingly and electrically connected with the second antenna, the input end of the second antenna port signal channel and the output end of the power signal channel. According to the invention, both noise coefficient and signal blocking can be considered, and the problems of signal leakage and interference between the two antenna ports are improved.

Description

Technical Field

[0001] The present invention relates to the field of wireless communication technologies, and particularly to an airborne antenna adaptation module. Background Art

[0002] With the continuous development of communication technologies, multi-antenna technology, as a key means to improve communication efficiency and system capacity, has been widely applied. However, in the application of multi-antenna in the prior art, the problems of signal leakage and mutual interference between antenna ports have always been a difficult problem to be solved urgently. Such signal leakage and mutual interference phenomena will not only cause the blocking effect of large transmitted signals on small received signals, seriously affecting the performance and stability of the communication system, but also may cause a series of other problems, such as reducing the transmission quality of signals and increasing the bit error rate of the system.

[0003] To address this technical problem, there are usually two processing methods in the prior art. One method is as Figure 1 shown, to abandon the processing of blocking signals, and configure the signals to pass through multiple stages of silicon-based switches (or gallium arsenide switches), amplifiers, and filters in sequence. Another method is as Figure 2 shown, to abandon the noise figure, and configure the signals to pass through multiple stages of silicon-based switches (or gallium arsenide switches), filters, and amplifiers in sequence. This method is to process the blocking signals by adding filters.

[0004] As a common signal processing component, a filter can effectively filter out signals within a specific frequency range, thereby reducing interference. However, the insertion of a filter will bring insertion loss, that is, the signal will suffer a certain attenuation when passing through the filter. The increase in insertion loss will directly lead to the deterioration of the noise figure of the system. The noise figure is an important indicator to measure the noise performance of the system, which reflects the amplification degree of the system to signal noise. When the noise figure increases, the signal-to-noise ratio of the system will decrease, thereby affecting the quality and reliability of communication.

[0005] The disclosure of the above background art content is only used to assist in understanding the inventive concept and technical solution of the present invention, and it does not necessarily belong to the prior art of this application, nor will it necessarily give technical guidance; in the case where there is no clear evidence indicating that the above content has been publicly disclosed before the filing date of this application, the above background art should not be used to evaluate the novelty and inventiveness of this application. Summary of the Invention

[0006] The object of the present invention is to provide an airborne antenna adaptation module, which can take into account both the noise figure and signal blocking, improve the problems of signal leakage and interference between two antenna ports, and ensure that both two antenna signal channels have excellent performance.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] An airborne antenna adaptation module includes a first antenna port signal channel, a second antenna port signal channel, and a power signal channel. Among them, the first antenna port signal channel includes a first PIN switch, a first limiter, a first filter, a first amplifier, and a first power splitter that are electrically connected in sequence. The input signal is output as several paths of signals after passing through the first power splitter;

[0009] The second antenna port signal channel includes a second PIN switch, a second limiter, a second filter, a first fixed attenuator, and a second amplifier that are electrically connected in sequence;

[0010] Both the first PIN switch and the second PIN switch are single-pole double-throw switches; among them, the first end of the first PIN switch can be selectively electrically connected to its second end or third end. The first end of the first PIN switch is electrically connected to the first antenna, the second end of the first PIN switch is electrically connected to the input end of the first antenna port signal channel, and the third end of the first PIN switch is electrically connected to the output end of the power signal channel;

[0011] The first end of the second PIN switch can be selectively electrically connected to its second end or third end. The first end of the second PIN switch is electrically connected to the second antenna, the second end of the second PIN switch is electrically connected to the input end of the second antenna port signal channel, and the third end of the second PIN switch is electrically connected to the output end of the power signal channel;

[0012] The power signal channel is configured to output a signal with a target power.

[0013] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, each of the several paths of signals output after passing through the first power splitter is filtered, amplified, and power-split in sequence and then output.

[0014] Further, based on any one of the foregoing technical solutions or a combination of multiple technical solutions, multiple output ends of the first power splitter are respectively electrically connected to a branch signal channel. The branch signal channel includes a filter and a fixed attenuator bank, a third amplifier, and a second power splitter that are electrically connected in sequence;

[0015] Among them, the filter and the fixed attenuator bank include multiple parallel sub-branches. The sub-branches include a filter and a fixed attenuator connected in series in sequence. The input ends of the multiple sub-branches are electrically connected to the input end of the branch signal channel through a first multi-pole multi-throw switch, and the output ends of the multiple sub-branches are electrically connected to the input end of the third amplifier through a second multi-pole multi-throw switch.

[0016] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, the first antenna port signal channel is configured to receive signals in a frequency range of 10X MHz to 400 MHz, where X is any natural number from 0 to 9.

[0017] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, the number of branch signal channels is 3. The filtering frequency range of one of the branch signal channels is 10X MHz to 17X MHz, the filtering frequency range of another branch signal channel is 22X MHz to 400 MHz, and the filtering frequency range of another branch signal channel is 10X MHz to 400 MHz.

[0018] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, the first antenna port signal channel is configured to receive signals in a frequency range of 10X MHz to 400 MHz, where X is any natural number from 0 to 9; and / or,

[0019] the second antenna port signal channel is configured to receive signals in a frequency range of 30 MHz to 8X MHz, where X is any natural number from 0 to 9; and / or,

[0020] the switching conversion time of the first PIN switch ≤ 50 μs; and / or,

[0021] the switching conversion time of the second PIN switch ≤ 50 μs.

[0022] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, the power signal channel includes a first power signal path and a second power signal path. The input end of the first power signal path is electrically connected to one of the first antenna and the second antenna through a single-pole double-throw switch;

[0023] the input end of the second power signal path is electrically connected to one of the first antenna and the second antenna through another single-pole double-throw switch.

[0024] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, the single-pole double-throw switch is a PIN switch; and / or,

[0025] the switching isolation of the single-pole double-throw switch ≥ 30 dB.

[0026] Further, based on any one of the above-described technical solutions or a combination of multiple technical solutions, it further includes a receiving output signal channel. The receiving output signal channel includes a signal input end and a signal output end, and the signal input end and the signal output end are connected through one or more single-pole double-throw switches.

[0027] Further, in any of the foregoing technical solutions or a combination of multiple technical solutions, the signal input end and the signal output end are connected through two-stage single-pole double-throw switches, and the switching isolation of the two-stage single-pole double-throw switches is ≥ 80 dB.

[0028] The beneficial effects brought by the technical solutions provided by the present invention are as follows:

[0029] a. In the present invention, by configuring that both the first antenna port signal channel and the second antenna port signal channel are electrically connected to the transceiver end of the antenna through PIN switches, the insertion loss of the PIN switches is less than that of silicon-based switches and gallium arsenide switches, and while increasing the isolation between the antennas, the loss is taken into account. Furthermore, both the blocking signal is suppressed and the noise figure is protected, without affecting the demodulation of the backend digital baseband signal.

[0030] b. In the present invention, by connecting a limiter first and then connecting backend processor components such as filters and amplifiers after the PIN switches in the first antenna port signal channel and the second antenna port signal channel, by adding a limiter after the PIN switches, the input signal of the entire link is limited. Therefore, it can be ensured that the signal of the entire link is relatively small, so that the inherent noise floor in the link no longer increases, and the suppression degree also increases accordingly.

[0031] c. The airborne antenna adaptation module provided by the present invention can realize the signal transceiver of two antennas in a wide frequency range and the direct input and output of signals with very few components through the first antenna port signal channel, the second antenna port signal channel, the power signal channel, and the receive output signal channel. Moreover, the transceiver ports of the two antennas can be set closely, enabling the miniaturization of the airborne antenna adaptation module and being applicable to more wireless communication scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings described below are only some embodiments recorded in the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0033] Figure 1 It is a module schematic diagram of the first antenna port link in the prior art;

[0034] Figure 2 It is a module schematic diagram of the second antenna port link in the prior art;

[0035] Figure 3 It is a module schematic diagram of the antenna port link provided by an exemplary embodiment of the present invention;

[0036] Figure 4 Schematic diagram of an airborne antenna adaptation module provided for an exemplary embodiment of the present invention;

[0037] Figure 5 Schematic diagram of the signal channel of the first antenna port provided for an exemplary embodiment of the present invention;

[0038] Figure 6 For Figure 5 Interface diagram of the simulation result of the performance of the signal channel of the first antenna port shown;

[0039] Figure 7 Schematic diagram of the signal channel of the second antenna port provided for an exemplary embodiment of the present invention;

[0040] Figure 8 For Figure 7 Interface diagram of the simulation result of the performance of the signal channel of the second antenna port shown;

[0041] Figure 9 Schematic diagram of the receiving output signal channel provided for an exemplary embodiment of the present invention. Detailed implementation manners

[0042] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0043] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, device, product or equipment that includes a series of steps or units does not necessarily need to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or equipment.

[0044] In an embodiment of the present invention, an airborne antenna adaptation module is provided. Refer to Figure 3 And Figure 4, the airborne antenna adaptation module includes a first antenna port signal channel, a second antenna port signal channel, and a power signal channel. Among them, the first antenna port signal channel includes a first PIN switch 11, a first limiter 21, a first filter 31, a first amplifier 41, and a first power divider 51 that are electrically connected in sequence. The input signal is output as several paths of signals after passing through the first power divider 51;

[0045] The second antenna port signal channel includes a second PIN switch 12, a second limiter 22, a second filter 32, a first fixed attenuator 61, and a second amplifier 42 that are electrically connected in sequence;

[0046] Both the first PIN switch and the second PIN switch are single-pole double-throw switches. Among them, the first end of the first PIN switch is selectively electrically connected to its second end or third end. The first end of the first PIN switch is electrically connected to the first antenna, the second end of the PIN switch is electrically connected to the input end of the first antenna port signal channel, and the third end of the PIN switch is electrically connected to the output end of the power signal channel;

[0047] The first end of the second PIN switch is selectively electrically connected to its second end or third end. The first end of the first PIN switch is electrically connected to the second antenna, the second end of the PIN switch is electrically connected to the input end of the second antenna port signal channel, and the third end of the PIN switch is electrically connected to the output end of the power signal channel;

[0048] The power signal channel is configured to output a signal with a target power.

[0049] Among them, for each of the several paths of signals output by the first power divider, each path of signal preferably passes through filtering and amplification in sequence and then is output. Optionally, the signal after secondary amplification can be further power-divided and then output.

[0050] In this embodiment, different from the prior art design scheme that uses, for example, Figure 1 as shown, first multiple-stage silicon-based switches or gallium arsenide switches, then amplifiers, and then filters, it is also different from the prior art design scheme that uses, for example, Figure 2 as shown, first multiple-stage silicon-based switches or gallium arsenide switches, then filters, and then amplifiers. As Figure 3 and Figure 4As shown, the present invention configures both the first antenna port signal channel and the second antenna port signal channel to be electrically connected to the transceiver ends of the antennas through PIN switches composed of multiple-stage PIN diodes. Since the insertion loss of the PIN switch is less than that of the silicon-based switch and the gallium arsenide switch, and while increasing the isolation between the antennas, the loss is also taken into account. Furthermore, both the blocking signal is suppressed and the noise figure is protected, without affecting the demodulation of the backend digital baseband signal. Therefore, it is possible to achieve a balance between anti-blocking signal and noise figure, improve the problem of signal leakage and interference between the two antenna ports, and enhance the performance of the signal transceiver channels of the two antennas.

[0051] In addition, both the first antenna port signal channel and the second antenna port signal channel are connected to backend processor components such as limiters, filters, and amplifiers after the PIN switches. By adding a limiter after the PIN switch, the input signal of the entire link is limited. Therefore, it is possible to ensure that the signal of the entire link is relatively small, so that the inherent noise floor in the link no longer increases, and the suppression degree also increases accordingly.

[0052] In an embodiment of the present invention, multiple output ends of the first power splitter are respectively electrically connected to a branch signal channel. The branch signal channel includes a filter and a fixed attenuator group, a third amplifier 43, and a second power splitter 52 that are electrically connected in sequence. Among them, the filter and the fixed attenuator group include multiple parallel sub-branches. The sub-branch includes a filter and a fixed attenuation connected in series in sequence, and the input ends of the multiple sub-branches are electrically connected to the input end of the branch signal channel through a first single-pole multi-throw switch 71, and the output ends of the multiple sub-branches are electrically connected to the input end of the third amplifier through a second single-pole multi-throw switch 72.

[0053] As Figure 4 and Figure 5 shown, the number of the sub-branches is 3, which includes a first sub-branch, a second sub-branch, and a third sub-branch connected in parallel. The first sub-branch includes a third filter 33 and a second fixed attenuator 62 connected in series, the second sub-branch includes a fourth filter 34 and a third fixed attenuator 63 connected in series, and the third sub-branch includes a fifth filter 35 and a fourth fixed attenuator 64 connected in series. The input ends of the third filter 33, the fourth filter 34, and the fifth filter 35 are electrically connected to the first output end of the first power splitter 51 through the first single-pole multi-throw switch 71, and the output ends of the second fixed attenuator 62, the third fixed attenuator 63, and the fourth fixed attenuator 64 are electrically connected to the input end of the third amplifier 43 through the second single-pole multi-throw switch 72.

[0054] In this embodiment, the first antenna port signal channel is configured to receive signals in the frequency range of 10X MHz to 400 MHz, where X is any natural number from 0 to 9. The number of branch signal channels is also 3. The filtering frequency range of one of the branch signal channels is 10X MHz to 17X MHz, the filtering frequency range of another branch signal channel is 22X MHz to 400 MHz, and the filtering frequency range of another branch signal channel is 10X MHz to 400 MHz. The switching conversion time of the first PIN switch is ≤50 μs. The signal is input into the first antenna port signal channel, limited, then filtered and amplified, then power-divided, and then segmented filtered and output to the port.

[0055] Referring to Figure 6, it can be seen from the simulation results of the first antenna port signal channel that all components in the power-divided output channel link of the first antenna port signal channel meet the frequency range requirements. An LC filter with a frequency range of 10X MHz to 400 MHz is selected at its input end, and the suppression can reach 60 dBc in the range of 10X MHz to 2 GHz, which can meet the index requirements. The link gain of the first antenna port signal channel is designed to be 16.15 dB, the link is in a very good linear region, the noise figure is ≤8 dB, and the anti-burning power > 34 dBm (continuous wave). The measured anti-burning power can reach more than 2 W.

[0056] In this embodiment, the second antenna port signal channel is as Figure 4 and Figure 7 shown. In this embodiment, the second antenna port signal channel is configured to receive signals in the frequency range of 30 MHz to 8X MHz, where X is any natural number from 0 to 9. The switching conversion time of the second PIN switch is ≤50 μs, the maximum input power of the second limiter can reach 40 dBm, and the link noise figure of the second antenna port signal channel is designed to be 6.85 dB. The simulation results of the second antenna port signal channel are as Figure 8 shown. An LC filter with a frequency range of 30 MHz to 8X MHz is selected at the input end of the second antenna port signal channel, and the suppression can reach 60 dBc in the range of 10X MHz to 2 GHz, which can meet the index requirements. The link gain of the second antenna port signal channel is designed to be 15.45 dB, the link is in a very good linear region, and the performance index is good.

[0057] In this embodiment, as Figure 9As shown, the power signal channel includes a first power signal path and a second power signal path. The input end of the first power signal path is electrically connected to one of the first antenna and the second antenna through a third single-pole double-throw switch 13; the input end of the second power signal path is electrically connected to one of the first antenna and the second antenna through a fourth single-pole double-throw switch 14. The single-pole double-throw switch is a PIN switch. The switch switching isolation of the single-pole double-throw switch is ≥ 30 dB. Based on the power signal channel, it is possible to output two different input signals to any one of the first antenna and the second antenna, and the two PIN switches have good isolation performance and can take into account signal leakage prevention and anti-interference performance.

[0058] In an embodiment of the present invention, as Figure 9 shown, the airborne antenna adaptation module further includes a received output signal channel. The received output signal channel includes a signal input end and a signal output end, and the signal input end and the signal output end are connected through one stage (such as Figure 9 shown) or multiple stages of single-pole double-throw switches. Preferably, in order to enhance the isolation performance, the signal input end and the signal output end are connected through two stages of single-pole double-throw switches, and the switch switching isolation of the two-stage single-pole double-throw switch is ≥ 80 dB.

[0059] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0060] The above are only specific embodiments of the present application. It should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present application, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. An airborne antenna adaptation module, characterized in that It includes a first antenna port signal channel, a second antenna port signal channel, and a power signal channel. Among them, the first antenna port signal channel includes a first PIN switch, a first limiter, a first filter, a first amplifier, and a first power splitter that are electrically connected in sequence. The input signal is output as several signals through the first power splitter. The second antenna port signal channel includes a second PIN switch, a second limiter, a second filter, a first fixed attenuator, and a second amplifier that are electrically connected in sequence. Both the first PIN switch and the second PIN switch are single-pole double-throw switches. Among them, the first end of the first PIN switch is selectively electrically connected to its second end or third end. The first end of the first PIN switch is electrically connected to the first antenna, the second end of the first PIN switch is electrically connected to the input end of the first antenna port signal channel, and the third end of the first PIN switch is electrically connected to the output end of the power signal channel. The first end of the second PIN switch is selectively electrically connected to its second end or third end. The first end of the second PIN switch is electrically connected to the second antenna, the second end of the second PIN switch is electrically connected to the input end of the second antenna port signal channel, and the third end of the second PIN switch is electrically connected to the output end of the power signal channel. The power signal channel is configured to output a signal with a target power.

2. The airborne antenna adaptation module according to claim 1, characterized in that For the several signals output through the first power splitter, each signal is output after being filtered, amplified, and power-split in sequence.

3. The airborne antenna adaptation module according to claim 2, characterized in that The multiple output ends of the first power splitter are respectively electrically connected to a branch signal channel. The branch signal channel includes a filter and a fixed attenuator bank, a third amplifier, and a second power splitter that are electrically connected in sequence. Among them, the filter and the fixed attenuator bank include multiple parallel sub-branches. The sub-branch includes a filter and a fixed attenuator connected in series in sequence. The input ends of the multiple sub-branches are electrically connected to the input end of the branch signal channel through a first multi-pole multi-throw switch, and the output ends of the multiple sub-branches are electrically connected to the input end of the third amplifier through a second multi-pole multi-throw switch.

4. The airborne antenna adaptation module according to claim 3, characterized in that The first antenna port signal channel is configured to receive signals in the frequency range of 10X MHz to 400 MHz, where X takes any natural number from 0 to 9.

5. The airborne antenna adaptation module according to claim 4, characterized in that, The number of the branch signal channels is 3. The filtering frequency range of one of the branch signal channels is 10X MHz to 17X MHz, the filtering frequency range of another branch signal channel is 22X MHz to 400 MHz, and the filtering frequency range of another branch signal channel is 10X MHz to 400 MHz.

6. The airborne antenna adaptation module according to claim 1, characterized in that The first antenna port signal channel is configured to receive signals in the frequency range of 10X MHz to 400 MHz, where X takes any natural number from 0 to 9; and / or, The second antenna port signal channel is configured to receive signals in the frequency range of 30 MHz to 8X MHz, where X takes any natural number from 0 to 9; and / or, The switching conversion time of the first PIN switch ≤ 50 μs; and / or, The switching conversion time of the second PIN switch ≤ 50 μs.

7. The airborne antenna adaptation module according to claim 1, characterized in that, The power signal channel includes a first power signal path and a second power signal path. The input end of the first power signal path is electrically connected to one of the first antenna and the second antenna through a single-pole double-throw switch; The input end of the second power signal path is electrically connected to one of the first antenna and the second antenna through another single-pole double-throw switch.

8. The airborne antenna adaptation module according to claim 7, characterized in that The single-pole double-throw switch is a PIN switch; and / or The switching isolation degree of the single-pole double-throw switch ≥ 30 dB.

9. The airborne antenna adaptation module according to claim 1, characterized in that It further includes a receiving output signal channel. The receiving output signal channel includes a signal input end and a signal output end, and the signal input end and the signal output end are connected through one stage or multiple stages of single-pole double-throw switches.

10. The airborne antenna adaptation module according to claim 9, wherein, The signal input end and the signal output end are connected through two stages of single-pole double-throw switches, and the switching isolation degree of the two stages of single-pole double-throw switches ≥ 80 dB.

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