Single-antenna input eight-path real-time output high-linearity short wave direct acquisition module

Abstract

The utility model discloses a single antenna input eight-path real-time output high linearity short wave direct acquisition module, which comprises a low pass filter, an amplitude limiter and a first switch which are sequentially connected, the first switch comprises three output ports, the first output port of the first switch is sequentially connected with a first pi attenuator and a second switch, and the second output port of the first switch is sequentially connected with a second pi attenuator. A first output port of the first switch is directly connected with a first switch, a second output port of the first switch is directly connected with a second switch, a third output port of the first switch is sequentially connected with a first amplifier, a second pi attenuator and the second switch, an output end of the second switch is sequentially connected with a first numerical control attenuator, a second amplifier and a power divider, and the power divider comprises eight output branches. And each output branch of the power divider comprises a BW filter, an amplifier, a numerical control attenuator, a BW filter and an amplifier which are connected in sequence. According to the utility model, the noise coefficient is low, the linearity is high, the cost is low, and the reliability is high.

Description

Technical Field

[0001] The utility model relates to the technical fields of microwave communication and satellite communication, in particular to a single-antenna input eight-channel real-time output high-linearity shortwave direct sampling module. Background Art

[0002] In recent years, with the rapid development of shortwave communication technology, people have placed increasingly higher demands on shortwave receiving equipment. Traditional shortwave receivers have a low level of device integration and rely on auxiliary equipment such as frequency conversion, filtering, and framing to achieve synchronous data acquisition and processing across the entire frequency band, which results in an increase in the overall size of the equipment.

[0003] Due to the low frequency, existing devices basically use segmented filtering and amplification schemes to achieve shortwave communication, which places very high demands on the devices. However, the amplifiers, power dividers and switches currently on the market basically cannot meet the requirements of low noise figure and high linearity. Utility Model Content

[0004] In order to solve the problems of large noise coefficient and poor linearity of traditional devices, the utility model proposes a single antenna input eight-way real-time output high linearity shortwave direct sampling module to solve the above problems.

[0005] The present application discloses a single-antenna input, eight-channel real-time output, high-linearity shortwave direct sampling module, comprising a low-pass filter, a limiter, and a first switch connected in sequence, wherein the first switch comprises three output ports, the first output port of the first switch being connected in sequence to a first π attenuator and a second switch, the second output port of the first switch being directly connected to the second switch, the third output port of the first switch being connected in sequence to a first amplifier, a second π attenuator, and a second switch, the output end of the second switch being connected in sequence to a first digitally controlled attenuator, a second amplifier, and a power divider, the power divider comprising eight output branches, each output branch of the power divider comprising a BW filter, an amplifier, a digitally controlled attenuator, a BW filter, and an amplifier connected in sequence.

[0006] Preferably, the eight output branches of the power divider are a first output branch, a second output branch, a third output branch, a fourth output branch, a fifth output branch, a sixth output branch, a seventh output branch and an eighth output branch;

[0007] The first output branch includes a first BW filter, a third amplifier, a second digitally controlled attenuator, a second BW filter, and a fourth amplifier connected in sequence;

[0008] The second output branch includes a third BW filter, a fifth amplifier, a third digitally controlled attenuator, a fourth BW filter, and a sixth amplifier connected in sequence;

[0009] The third output branch includes a fifth BW filter, a seventh amplifier, a fourth digitally controlled attenuator, a sixth BW filter and an eighth amplifier connected in sequence;

[0010] The fourth output branch includes a seventh BW filter, a ninth amplifier, a fifth digitally controlled attenuator, an eighth BW filter, and a tenth amplifier connected in sequence;

[0011] The fifth output branch includes a ninth BW filter, an eleventh amplifier, a sixth digitally controlled attenuator, a tenth BW filter, and a twelfth amplifier connected in sequence;

[0012] The sixth output branch includes an eleventh BW filter, a thirteenth amplifier, a seventh digitally controlled attenuator, a twelfth BW filter, and a fourteenth amplifier connected in sequence;

[0013] The seventh output branch includes a thirteenth BW filter, a fifteenth amplifier, an eighth digitally controlled attenuator, a fourteenth BW filter, and a sixteenth amplifier connected in sequence;

[0014] The eighth output branch includes a fifteenth BW filter, a seventeenth amplifier, a ninth digitally controlled attenuator, a sixteenth BW filter, and an eighteenth amplifier connected in sequence.

[0015] Preferably, the low-pass filter model is MLBDC-33M-3948.

[0016] Preferably, the limiter model is ILM-0006D-CQ4.

[0017] Preferably, the models of the first switch and the second switch are HGC1004LP4.

[0018] Preferably, the models of the first π attenuator and the second π attenuator are IFA-03-PQ3.

[0019] Preferably, the model of the first amplifier, the second amplifier, the third amplifier, the fourth amplifier, the fifth amplifier, the sixth amplifier, the seventh amplifier, the eighth amplifier, the ninth amplifier, the tenth amplifier, the eleventh amplifier, the twelfth amplifier, the thirteenth amplifier, the fourteenth amplifier, the fifteenth amplifier, the sixteenth amplifier, the seventeenth amplifier and the eighteenth amplifier is HG586.

[0020] Preferably, the model of the power splitter is JCPS-8-10+.

[0021] Preferably, the models of the first digitally controlled attenuator, the second digitally controlled attenuator, the third digitally controlled attenuator, the fourth digitally controlled attenuator, the fifth digitally controlled attenuator, the sixth digitally controlled attenuator, the seventh digitally controlled attenuator, the eighth digitally controlled attenuator and the first digitally controlled attenuator are HGC2005LP4.

[0022] Preferably, the first BW filter and the second BW filter are band-pass filters with a model of MLB0.009~4M and a frequency of 0.009MHz~4MHz;

[0023] The third BW filter and the fourth BW filter are band-pass filters with a model of MLB3.5-8M and a frequency of 3.5MHz-8MHz;

[0024] The fifth BW filter and the sixth BW filter are band-pass filters with a model of MLB7.5-12M and a frequency of 7.5MHz-12MHz;

[0025] The seventh BW filter and the eighth BW filter are band-pass filters with a model of MLB11.5-16M and a frequency of 11.5 MHz to 16 MHz;

[0026] The ninth BW filter and the tenth BW filter are band-pass filters with a model of MLB15.5-20M and a frequency of 15.5MHz-20MHz;

[0027] The eleventh BW filter and the twelfth BW filter are band-pass filters with a model of MLB19.5-24M and a frequency of 19.5 MHz to 24 MHz;

[0028] The thirteenth BW filter and the fourteenth BW filter are band-pass filters with a model of MLB23.6-28M and a frequency of 23.6MHz-28MHz;

[0029] The fifteenth BW filter and the sixteenth BW filter are band-pass filters with a model of MLB27.5-32M and a frequency of 27.5 MHz to 32 MHz.

[0030] Beneficial effects of the utility model:

[0031] The utility model adopts a solution of single antenna input and eight-way real-time output, and provides a high linearity shortwave direct sampling module with excellent key technical indicators such as low noise figure, high linearity, low cost and high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a structural diagram of a single-antenna input eight-channel real-time output high-linearity shortwave direct sampling module according to an embodiment of the present utility model.

[0033] The reference numerals are as follows:

[0034] 1- low-pass filter, 2- limiter, 3- first switch, 4- first π attenuator, 5- first amplifier, 6- second π attenuator, 7- second switch, 8- first digitally controlled attenuator, 9- second amplifier, 10- power splitter, 11- first BW filter, 12- third amplifier, 13- second digitally controlled attenuator, 14- second BW filter, 15- fourth amplifier, 16- third BW filter, 17- fifth amplifier, 18- third digitally controlled attenuator, 19- fourth BW filter, 20- sixth amplifier, 21- fifth BW filter, 22- seventh amplifier, 23- fourth digitally controlled attenuator, 24- sixth BW filter, 25- eighth amplifier, 26- seventh BW filter, 27- ninth amplifier amplifier, 28-fifth digitally controlled attenuator, 29-eighth BW filter, 30-tenth amplifier, 31-ninth BW filter, 32-eleventh amplifier, 33-sixth digitally controlled attenuator, 34-tenth BW filter, 35-twelfth amplifier, 36-eleventh BW filter, 37-thirteenth amplifier, 38-seventh digitally controlled attenuator, 39-twelfth BW filter, 40-fourteenth filter, 41-thirteenth BW filter, 42-fifteenth amplifier, 43-eighth digitally controlled attenuator, 44-fourteenth BW filter, 45-sixteenth amplifier, 46-fifteenth BW filter, 47-seventeenth amplifier, 48-ninth digitally controlled attenuator, 49-sixteenth BW filter, eighteenth amplifier. DETAILED DESCRIPTION

[0035] In order to make the objectives, technical solutions and advantages of this application more clear, the application is further described in detail below with reference to the accompanying drawings and examples.

[0036] The embodiment of the present application discloses a single antenna input eight-way real-time output high linearity shortwave direct sampling module, such as Figure 1 As shown, it includes a low-pass filter 1, a limiter 2 and a first switch 3 connected in sequence. The first switch 3 includes three output ports. The first output port of the first switch 3 is connected to a first π attenuator 4 and a second switch 7 in sequence. The second output port of the first switch 3 is directly connected to the second switch 7. The third output port of the first switch 3 is connected to a first amplifier 5, a second π attenuator 6 and a second switch 7 in sequence. The output end of the second switch 7 is connected to a first digitally controlled attenuator 8, a second amplifier 9 and a power divider 10 in sequence. The power divider 10 includes eight output branches. Each output branch of the power divider 10 includes a BW filter, an amplifier, a digitally controlled attenuator, a BW filter and an amplifier connected in sequence.

[0037] In a specific embodiment, the low-pass filter 1 is of model MLBDC-33M-3948. The limiter 2 is of model ILM-0006D-CQ4. The first switch 3 and the second switch 7 are of model HGC1004LP4. The first amplifier 5, the second amplifier 9, the third amplifier 12, the fourth amplifier 15, the fifth amplifier 17, the sixth amplifier 20, the seventh amplifier 22, the eighth amplifier 25, the ninth amplifier 27, the tenth amplifier 30, the eleventh amplifier 32, the twelfth amplifier 35, the thirteenth amplifier 37, the fourteenth amplifier 40, the fifteenth amplifier 42, the sixteenth amplifier 45, the seventeenth amplifier 47, and the eighteenth amplifier 50 are of model HG586. The model numbers of the first digitally controlled attenuator 8, the second digitally controlled attenuator 13, the third digitally controlled attenuator 18, the fourth digitally controlled attenuator 23, the fifth digitally controlled attenuator 28, the sixth digitally controlled attenuator 33, the seventh digitally controlled attenuator 38, the eighth digitally controlled attenuator 43, and the first digitally controlled attenuator 48 are HGC2005LP4. The model numbers of the first π attenuator 4 and the second π attenuator 6 are IFA-03-PQ3. The model number of the power divider 10 is JCPS-8-10+.

[0038] The eight output branches of the power divider 10 are a first output branch, a second output branch, a third output branch, a fourth output branch, a fifth output branch, a sixth output branch, a seventh output branch and an eighth output branch; the first output branch includes a first BW filter 11, a third amplifier 12, a second digitally controlled attenuator 13, a second BW filter 14 and a fourth amplifier 15 connected in sequence; the second output branch includes a third BW filter 16, a fifth amplifier 17, a third digitally controlled attenuator 18, a fourth BW filter 19 and a sixth amplifier 20 connected in sequence; the third output branch includes a fifth BW filter 21, a seventh amplifier 22, a fourth digitally controlled attenuator 23, a sixth BW filter 24 and an eighth amplifier 25 connected in sequence; the fourth output branch includes a seventh BW filter 26, a ninth amplifier 27, a ninth amplifier 28 and a sixth amplifier 29 connected in sequence. The fifth output branch includes a fifth digitally controlled attenuator 28, an eighth BW filter 29 and a tenth amplifier 30; the fifth output branch includes a ninth BW filter 31, an eleventh amplifier 32, a sixth digitally controlled attenuator 33, a tenth BW filter 34 and a twelfth amplifier 35 connected in sequence; the sixth output branch includes an eleventh BW filter 36, a thirteenth amplifier 37, a seventh digitally controlled attenuator 38, a twelfth BW filter 39 and a fourteenth amplifier 40 connected in sequence; the seventh output branch includes a thirteenth BW filter 41, a fifteenth amplifier 42, an eighth digitally controlled attenuator 43, a fourteenth BW filter 44 and a sixteenth amplifier 45 connected in sequence; the eighth output branch includes a fifteenth BW filter 46, a seventeenth amplifier 47, a ninth digitally controlled attenuator 48, a sixteenth BW filter 49 and an eighteenth amplifier 45 connected in sequence.

[0039] In a specific embodiment, all BW filters are MLB bandpass filters, and the specific parameters are shown in Table 1:

[0040] Table 1 Output frequency band division table

[0041] Serial number FL(kHz) FH(kHz) F0(kHz) BW(kHz) 1 9 4000 2004.5 3991 2 3500 8000 5750 4500 3 7500 12000 9750 4500 4 11500 16000 13750 4500 5 15500 20000 17750 4500 6 19500 24000 21750 4500 7 23500 28000 25750 4500 8 27500 32000 29750 4500

[0042] In Table 1, the serial number indicates the corresponding output branch, FL indicates the lower cutoff frequency, FH indicates the upper cutoff frequency, F0 indicates the center frequency, and BW indicates the bandwidth.

[0043] Specifically, the first BW filter 11 and the second BW filter 14 use a band-pass filter with a model of MLB0.009~4M and a frequency of 0.009MHz~4MHz; the third BW filter 16 and the fourth BW filter 19 use a band-pass filter with a model of MLB3.5~8M and a frequency of 3.5MHz~8MHz; the fifth BW filter 21 and the sixth BW filter 24 use a band-pass filter with a model of MLB7.5~12M and a frequency of 7.5MHz~12MHz; the seventh BW filter 26 and the eighth BW filter 29 use a band-pass filter with a model of MLB11.5~16M and a frequency of 11.5MHz~16MHz; the ninth ... The filter 31 and the tenth BW filter 34 use band-pass filters with a model of MLB15.5~20M and a frequency of 15.5MHz~20MHz; the eleventh BW filter 36 and the twelfth BW filter 39 use band-pass filters with a model of MLB19.5~24M and a frequency of 19.5MHz~24MHz; the thirteenth BW filter 41 and the fourteenth BW filter 46 use band-pass filters with a model of MLB23.6~28M and a frequency of 23.6MHz~28MHz; the fifteenth BW filter 46 and the sixteenth BW filter 49 use band-pass filters with a model of MLB27.5~32M and a frequency of 27.5MHz~32MHz.

[0044] The technical indicators achieved by the single antenna input eight-way real-time output high linearity shortwave direct sampling module disclosed in the above embodiment are as follows:

[0045] (1) Operating frequency band: 9KHz~32MHz;

[0046] (2) Receiving working mode: normal, low noise;

[0047] (3) Input standing wave: ≤1.5;

[0048] (4) Noise figure: ≤6dB;

[0049] (5) Anti-burning ability: ≥30dBm;

[0050] (6) Gain: Low noise mode: ≥30dB; Normal mode: ≥20dB;

[0051] (7) Input second-order intercept point: ≥70dBm;

[0052] (8) Input third-order intercept point: ≥30dBm

[0053] (9) Spurious signal (referred to the input): No more than two points with a level exceeding -115dBm;

[0054] (10) Attenuation range: 30dB, step 1dB.

[0055] The signal input interface parameters of the single antenna input eight-channel real-time output high linearity shortwave direct sampling module disclosed in the above embodiment are as follows:

[0056] (1) RF signal input frequency: 9KHz~32MHz;

[0057] (2) Number of channels: 1, SMA.

[0058] The signal output interface parameters of the single antenna input eight-way real-time output high linearity shortwave direct sampling module disclosed in the above embodiment are as follows:

[0059] (1) RF signal output frequency: 9KHz~32MHz;

[0060] (2) Number of channels: 8, SMA.

[0061] The frequency conversion part of this module is assembled entirely using SMT technology. The entire RF link control is simple, power consumption is low, and product consistency is good. It is basically debugging-free, has low production costs, good temperature stability, and high reliability. It is a universal module for shortwave monitoring and reception with strong scalability.

[0062] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A single antenna input eight-way real-time output high linearity shortwave direct sampling module, characterized in that: The invention comprises a low-pass filter (1), a limiter (2) and a first switch (3) connected in sequence, wherein the first switch (3) comprises three output ports, the first output port of the first switch (3) is connected in sequence to a first π attenuator (4) and a second switch (7), the second output port of the first switch (3) is directly connected to the second switch (7), the third output port of the first switch (3) is connected in sequence to a first amplifier (5), a second π attenuator (6) and the second switch (7), the output end of the second switch (7) is connected in sequence to a first digitally controlled attenuator (8), a second amplifier (9) and a power divider (10), the power divider (10) comprises eight output branches, and each output branch of the power divider (10) comprises a BW filter, an amplifier, a digitally controlled attenuator, a BW filter and an amplifier connected in sequence.

2. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 1 is characterized in that: The eight output branches of the power divider (10) are a first output branch, a second output branch, a third output branch, a fourth output branch, a fifth output branch, a sixth output branch, a seventh output branch and an eighth output branch; The first output branch comprises a first BW filter (11), a third amplifier (12), a second digitally controlled attenuator (13), a second BW filter (14), and a fourth amplifier (15) connected in sequence; The second output branch comprises a third BW filter (16), a fifth amplifier (17), a third digitally controlled attenuator (18), a fourth BW filter (19), and a sixth amplifier (20) connected in sequence; The third output branch comprises a fifth BW filter (21), a seventh amplifier (22), a fourth digitally controlled attenuator (23), a sixth BW filter (24), and an eighth amplifier (25) connected in sequence; The fourth output branch comprises a seventh BW filter (26), a ninth amplifier (27), a fifth digitally controlled attenuator (28), an eighth BW filter (29), and a tenth amplifier (30) connected in sequence; The fifth output branch comprises a ninth BW filter (31), an eleventh amplifier (32), a sixth digitally controlled attenuator (33), a tenth BW filter (34), and a twelfth amplifier (35) connected in sequence; The sixth output branch comprises an eleventh BW filter (36), a thirteenth amplifier (37), a seventh digitally controlled attenuator (38), a twelfth BW filter (39) and a fourteenth amplifier (40) connected in sequence; The seventh output branch comprises a thirteenth BW filter (41), a fifteenth amplifier (42), an eighth digitally controlled attenuator (43), a fourteenth BW filter (44) and a sixteenth amplifier (45) connected in sequence; The eighth output branch comprises a fifteenth BW filter (46), a seventeenth amplifier (47), a ninth digitally controlled attenuator (48), a sixteenth BW filter (49) and an eighteenth amplifier (45) connected in sequence.

3. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 2 is characterized in that: The low-pass filter (1) has a model number of MLBDC-33M-3948.

4. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 3 is characterized in that: The model of the limiter (2) is ILM-0006D-CQ4.

5. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 4 is characterized in that: The model of the first switch (3) and the second switch (7) is HGC1004LP4.

6. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 5, characterized in that: The model of the first π attenuator (4) and the second π attenuator (6) is IFA-03-PQ3.

7. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 6, characterized in that: The model of the first amplifier (5), the second amplifier (9), the third amplifier (12), the fourth amplifier (15), the fifth amplifier (17), the sixth amplifier (20), the seventh amplifier (22), the eighth amplifier (25), the ninth amplifier (27), the tenth amplifier (30), the eleventh amplifier (32), the twelfth amplifier (35), the thirteenth amplifier (37), the fourteenth amplifier (40), the fifteenth amplifier (42), the sixteenth amplifier (45), the seventeenth amplifier (47) and the eighteenth amplifier (50) is HG586.

8. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 7, characterized in that: The model of the power divider (10) is JCPS-8-10+.

9. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 8, characterized in that: The model of the first digitally controlled attenuator (8), the second digitally controlled attenuator (13), the third digitally controlled attenuator (18), the fourth digitally controlled attenuator (23), the fifth digitally controlled attenuator (28), the sixth digitally controlled attenuator (33), the seventh digitally controlled attenuator (38), the eighth digitally controlled attenuator (43) and the first digitally controlled attenuator (48) is HGC2005LP4.

10. The single antenna input eight-way real-time output high linearity shortwave direct sampling module according to claim 9, characterized in that: The first BW filter (11) and the second BW filter (14) are bandpass filters with a model of MLB0.009-4M and a frequency of 0.009 MHz to 4 MHz; The third BW filter (16) and the fourth BW filter (19) are band-pass filters with a model of MLB3.5-8M and a frequency of 3.5 MHz to 8 MHz; The fifth BW filter (21) and the sixth BW filter (24) are band-pass filters with a model of MLB7.5-12M and a frequency of 7.5 MHz to 12 MHz; The seventh BW filter (26) and the eighth BW filter (29) are band-pass filters with a model of MLB11.5-16M and a frequency of 11.5 MHz to 16 MHz; The ninth BW filter (31) and the tenth BW filter (34) are bandpass filters with a model of MLB15.5-20M and a frequency of 15.5 MHz to 20 MHz; The eleventh BW filter (36) and the twelfth BW filter (39) are band-pass filters with a model of MLB19.5-24M and a frequency of 19.5 MHz to 24 MHz; The thirteenth BW filter (41) and the fourteenth BW filter (46) are band-pass filters with a model of MLB23.6-28M and a frequency of 23.6 MHz to 28 MHz; The fifteenth BW filter (46) and the sixteenth BW filter (49) are band-pass filters with a model of MLB27.5-32M and a frequency of 27.5 MHz to 32 MHz.

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