Frequency conversion method of novel broadband receiver

Abstract

The invention provides a frequency conversion method of a novel broadband receiver. The method comprises configuration and connection modes of elements such as a switch matrix, an amplification link, a frequency conversion link, an attenuator and a filter. Particularly, the method realizes multiple frequency conversion operations, so that the frequency segments of the input signal can be effectively processed and amplified. Meanwhile, through reasonable design of an amplification link, gain of signals after frequency conversion can be achieved, and therefore signal quality and reliability are improved. In addition, the method further comprises the step of further processing and analyzing the signals of different frequency bands, and receiving and processing of the wide-frequency-band signals are effectively achieved. On the whole, the method provides a unique and effective solution for frequency conversion processing of the broadband receiver through application of multiple technical means. Compared with a common multi-link amplification design, the design shares one amplification link through the switch matrix, so that the design volume and cost are effectively saved.

Description

Technical Field

[0001] The present invention relates to the technical field of perimeter security systems, and particularly to a frequency conversion method for a new type of broadband receiver. Background Art

[0002] Centimeter waves have the advantages of a wide available frequency band, small size, and high spatial resolution, and have been widely used in recent years in fields such as ship navigation radars, weapon control radars, range measurement radars, and airborne weather radars. In particular, frequency bands such as the L band (1 - 2 GHz), C band (4 - 8 GHz), and Ku band (12 - 18 GHz) have received extensive attention in communication in recent years. With the development of radar and communication systems, there is a growing demand for frequency conversion of broadband signals, as the reception of signals in a single frequency band is no longer sufficient.

[0003] When currently dealing with the frequency conversion of broadband signals, problems such as the overlap of harmonics of low-frequency signals and high-frequency signals, and interference from various types of clutter generated during frequency conversion to the signal itself are often encountered. Due to the broadband nature, these clutter often overlap with the signal itself, making it impossible to remove them.

[0004] To address these problems, the received signal is usually frequency segmented, and then frequency converted to a certain frequency for subsequent processing. Although the segmentation operation has been carried out, due to the fact that the frequency conversion is to a single frequency, the suppression of some clutter is still limited.

[0005] Disadvantages of the prior art: Usually, the received signal is frequency segmented, and then frequency converted to a certain frequency for subsequent processing. Although the segmentation operation has been carried out, due to the fact that the frequency conversion is to a single frequency, the suppression of some clutter is still limited.

[0006] Therefore, a new frequency conversion method is urgently needed. Summary of the Invention

[0007] In view of this, the technical problem to be solved by the present invention is to provide a frequency conversion method for a new type of broadband receiver. The present invention adopts a more refined segmentation process, and at the same time, different signals are frequency converted into two different signals, which can ensure the purity of each segment of the signal.

[0008] In a first aspect, an embodiment of the present invention provides a frequency conversion method for a new type of broadband receiver, characterized by comprising:

[0009] A switch matrix and an amplification link; several switches are provided in both the switch matrix and the amplification link; the switch matrix includes a first switch matrix and a second switch matrix;

[0010] A decay unit and a filter; the decay unit includes a fixed attenuator and a variable attenuator; the filter includes a band-pass filter and a low-pass filter;

[0011] The switch matrix and the amplification link are respectively provided with signal input ends and signal output ends;

[0012] The fixed decayers are respectively arranged at the rear ends of the input ends of the switch matrix;

[0013] The amplification link further includes an amplifier and a mixer;

[0014] Wherein, the output end of the first switch matrix is connected to the input end of the second switch matrix through the amplification link;

[0015] Wherein, the signal includes a frequency segment of 0.4 GHz - 18 GHz; the frequency of 0.4 GHz - 18 GHz is frequency-converted into at least 14 segments through the first switch matrix.

[0016] Preferably, it includes:

[0017] S1: Perform the first frequency conversion through the first switch matrix and output the frequency-converted signal;

[0018] S2: Perform gain on the frequency-converted signal through the amplification link;

[0019] S3: Perform the second frequency conversion on the gain signal through the second switch matrix and then output it.

[0020] Preferably, the S1 further includes:

[0021] S11: Through the first switch matrix, perform the first frequency conversion on the input signal, and the signal is frequency-converted into at least two different frequency band signals;

[0022] S12: Through the first switch matrix, perform the second frequency conversion on the two different frequency band signals respectively, and frequency-convert the input signal into at least 14 different frequency band signals;

[0023] S13: Output the at least 14 different frequency band signals to the amplification link respectively through the output end of the first switch matrix;

[0024] Wherein, the at least 14 different frequency band signals share the same amplification link.

[0025] Preferably, the at least 14 segments included in the frequency of 0.4 GHz - 18 GHz include the following segmentation methods:

[0026] 0.4 GHz - 0.65 GHz, 0.65 GHz - 0.85 GHz, 0.85 GHz - 1.25 GHz, 1.25 GHz - 2 GHz, 2 GHz - 2.7 GHz, 2.7 GHz - 3.2 GHz, 3.2 GHz - 4.1 GHz, 4.1 GHz - 5.6 GHz, 5.6 GHz - 6.9 GHz, 6.9 GHz - 7.8 GHz, 7.8 GHz - 10.4 GHz, 10.4 GHz - 11.6 GHz, 11.6 GHz - 13.3 GHz, 13.3 GHz - 18 GHz.

[0027] Preferably, the amplification link connects the variable attenuator, amplifier, equalizer, low - pass filter, and mixer in series in the above - mentioned order.

[0028] Preferably, the S3 further includes:

[0029] S31: Input the amplified signal from the amplification link into the second switch matrix;

[0030] S32: Frequency - convert the amplified signal into at least two different frequency - band signal frequencies through the second switch matrix;

[0031] S33: Output the at least two different frequency - band signal frequencies separately through the output end of the second switch matrix;

[0032] Among them, the at least two signal frequencies after the second switch matrix frequency - converts the amplified signal are 22 GHz and 25 GHz respectively;

[0033] Among them, both the first switch matrix and the second switch matrix frequency - convert the signal through the band - pass filter.

[0034] In summary, the beneficial effects of the present invention are as follows:

[0035] To solve the above - mentioned technical problems, the embodiment of the present invention provides a frequency - conversion method for a new - type broadband receiver; this frequency - conversion method for a new - type broadband receiver has the following beneficial effects:

[0036] 1. Wide - band processing ability: This method can effectively process the signal frequency segments in the range of 0.4 GHz to 18 GHz, realizing the reception and processing of wide - band signals, making the receiver have stronger versatility and flexibility when processing complex signals.

[0037] 2. Signal gain and optimization: By performing gain processing on the signal through the amplification link, the quality and reliability of the signal can be improved, effectively enhancing the signal transmission ability and anti - interference ability.

[0038] 3. Multi - stage frequency conversion operation: By adopting multi - stage frequency conversion operation, the input signal can be effectively processed and optimized, thus ensuring a higher - quality output signal that better meets the processing requirements of the receiving end.

[0039] 4. Rational component configuration and connection, in line with engineering practice: Components such as attenuators and filters are adopted. Through reasonable connection methods, the integrity and accuracy of the signal can be maximally retained, improving the precision and reliability of signal processing.

[0040] Generally speaking, a novel broadband receiver frequency conversion method is provided. It can solve the influence of clutter on the signal purity during the frequency conversion of a 0.4GHz - 18GHz broadband receiver. At the same time, through the switch matrix, a common amplification link is used, effectively saving the design volume and cost. Different from the usual broadband receiver frequency conversion methods, through more refined frequency segmentation and two different first - stage frequency conversion frequencies, a very pure signal is obtained. Compared with the usual design of multi - link amplification, in this design, through the switch matrix, a common amplification link is used, effectively saving the design volume and cost.

[0041] Referring to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the ways in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present invention include many changes, modifications, and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings, and all of these are within the protection scope of the present invention.

[0043] Figure 1 is the structural block diagram of the present invention;

[0044] Parts and numbers in the figure:

[0045] 11 - First switch matrix, 12 - Second switch matrix, 13 - Fixed attenuator, 14 - Variable attenuator, 15 - Band - pass filter, 16 - Low - pass filter, 17 - Amplification link, 18 - Amplifier, 19 - Mixer, 20 - Switch, 21 - Equalizer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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. It should be noted that in this text, 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 sequence between these entities or operations. In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. This is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Moreover, the terms "include", "comprise" or any other variant thereof are 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 also includes elements inherent to such process, method, article or device. Without further limitation, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the process, method, article or device including the said elements. If there is no conflict, the embodiments of the present invention and the various features in the embodiments may be combined with each other, and all are within the protection scope of the present invention.

[0047] Embodiment 1

[0048] Please refer to Figure 1 , the embodiments of the present invention provide a frequency conversion method for a new type of broadband receiver, which is characterized by including: a switch matrix and an amplification link 17; a plurality of switches 20 are provided in both the switch matrix and the amplification link 17; the switch matrix includes a first switch matrix 11 and a second switch matrix 12;

[0049] A decay device and a filter; the decay device includes a fixed attenuator 13 and a variable attenuator 14; the attenuator is a passive circuit element used to reduce the amplitude of the signal in the circuit. The functions of the fixed attenuator 13 and the variable attenuator 14 are similar, both are used to adjust the amplitude of the circuit signal.

[0050] The resistance value of the fixed attenuator 13 is constant, and its function is to reduce the signal amplitude in the circuit to a fixed proportional value. The fixed attenuator 13 is usually used for signal matching and balancing in the circuit to prevent damage due to excessive signal amplitude.

[0051] The resistance value of the variable attenuator 14 can be adjusted as needed, and its function is to reduce the signal amplitude in the circuit to different proportional values as needed. The variable attenuator 14 is usually used for fine signal adjustment in the circuit, such as adjusting the sensitivity and output power of the receiver;

[0052] Therefore, the variable attenuator 14 is provided in the amplification link 17. The amplification link 17 can solve the influence of clutter generated during the frequency conversion of a 0.4GHz - 18GHz broadband receiver on the signal purity. At the same time, the switch matrix shares the same amplification link 17, and through more refined frequency segmentation, the design volume and cost can be effectively saved.

[0053] The filter includes a band - pass filter 15 and a low - pass filter 16;

[0054] The switch matrix and the amplification link 17 are respectively provided with a signal input end and a signal output end; both the signal input end and the signal output end are provided with switches 20; the switch 20 includes a two - way and a seven - way switch, which divides the signal into multiple inputs; the fixed attenuator 0 is provided at the rear end of the input end of the switch matrix; the amplification link 17 further includes an amplifier 18 and a mixer 19;

[0055] The function of the amplifier 18 is to amplify the input signal in the circuit to a certain amplitude, usually used to amplify weak signals or increase the signal power; while the function of the mixer 19 is to mix two signals with different frequencies to obtain a signal with a new frequency and frequency difference.

[0056] When the amplifier 18 and the mixer 19 are connected in series, first, the signal is amplified by the amplifier 18, and then the signal is frequency - converted and mixed by the mixer 19. This series connection method can realize the function of converting a low - power, low - frequency signal into a high - power, high - frequency signal. At the same time, due to the processing of the signal by the amplifier 18 and the mixer 19, it can also play a certain role in anti - interference and enhancing the signal quality.

[0057] Among them, the output end of the first switch matrix 11 is connected to the input end of the second switch matrix 12 through the amplification link;

[0058] Among them, the signal includes a frequency segment of 0.4GHz - 18GHz; the frequency of 0.4GHz - 18GHz is frequency - converted by the first switch matrix 11 into at least 14 segments.

[0059] Preferably, it includes:

[0060] S1: Perform the first frequency conversion through the first switch matrix and output the frequency - converted signal:

[0061] S2: Amplify the frequency-converted signal through the amplification link;

[0062] S3: After second frequency conversion of the amplified signal through the second switch matrix, output it.

[0063] The signal enters through the switch in the first matrix switch 20, and through the implementation switch, one-way signal is frequency-converted into two-way signals of 0.4 Hz - 4.1 Hz and 4.1 Hz - 18 Hz and enters; then respectively through the switch that can divide the signal into seven paths, the two-way signals of 0.4 Hz - 4.1 Hz and 4.1 Hz - 18 Hz are sent respectively, and through the band-pass filter 15, the signals are respectively frequency-converted into signals of 0.4 GHz - 0.65 GHz, 0.65 GHz - 0.85 GHz, 0.85 GHz - 1.25 GHz, 1.25 GHz - 2 GHz, 2 GHz - 2.7 GHz, 2.7 GHz - 3.2 GHz, 3.2 GHz - 4.1 GHz and 4.1 GHz - 5.6 GHz, 5.6 GHz - 6.9 GHz, 6.9 GHz - 7.8 GHz, 7.8 GHz - 10.4 GHz, 10.4 GHz - 11.6 GHz, 11.6 GHz - 13.3 GHz, 13.3 GHz - 18 GHz; then through the switch for summary output to the amplification link 17;

[0064] Preferably, the S1 further includes:

[0065] S11: Through the first switch matrix 11, perform the first frequency conversion on the input signal, and the signal is frequency-converted into signal frequencies of at least two different frequency bands;

[0066] S12: Through the first switch matrix 11, perform the second frequency conversion on the signal frequencies of the two different frequency bands respectively, and frequency-convert the input signal into signal frequencies of at least 14 different frequency bands;

[0067] S13: Output the at least 14 different frequency band signal frequencies respectively through the output end of the first switch matrix 11 to the amplification link 17;

[0068] Wherein, the at least 14 different frequency band signal frequencies share the same amplification link 17.

[0069] Preferably, the at least 14 segments included in the frequency of 0.4 GHz - 18 GHz include the following segmentation method:

[0070] 0.4 GHz - 0.65 GHz, 0.65 GHz - 0.85 GHz, 0.85 GHz - 1.25 GHz, 1.25 GHz - 2 GHz, 2 GHz - 2.7 GHz, 2.7 GHz - 3.2 GHz, 3.2 GHz - 4.1 GHz, 4.1 GHz - 5.6 GHz, 5.6 GHz - 6.9 GHz, 6.9 GHz - 7.8 GHz, 7.8 GHz - 10.4 GHz, 10.4 GHz - 11.6 GHz, 11.6 GHz - 13.3 GHz, 13.3 GHz - 18 GHz.

[0071] Preferably, the amplification link connects the variable attenuator 14, the amplifier 18, the equalizer 21, the low-pass filter 16, and the mixer 19 in series in the above-mentioned order.

[0072] Preferably, the S3 further includes:

[0073] S31: Input the amplified signal from the amplification link 17 into the second switch matrix 12;

[0074] S32: Frequency-convert the amplified signal into signal frequencies of at least two different frequency bands through the second switch matrix 12;

[0075] S33: Output the signal frequencies of at least two different frequency bands separately through the output end of the second switch matrix 12;

[0076] Wherein, the at least two signal frequencies after frequency-converting the amplified signal by the second switch matrix 12 are 22 GHz and 25 GHz respectively;

[0077] Wherein, both the first switch matrix 11 and the second switch matrix 12 frequency-convert the signal through the band-pass filter 15.

[0078] Embodiment 2

[0079] Please refer to Figure 1 , the embodiment of the present invention provides a frequency conversion method for a new type of broadband receiver, which is characterized in that it further includes a new type of broadband receiver as the carrier of this method; the embodiment of the present invention provides a frequency conversion method for a new type of broadband receiver; this frequency conversion method of the new type of broadband receiver has the following beneficial effects:

[0080] 1. Wide frequency band processing ability: This method can effectively process the signal frequency segmentation in the range of 0.4 GHz to 18 GHz, realizing the reception and processing of wide frequency band signals, making the receiver have stronger versatility and flexibility when processing complex signals.

[0081] 2. Signal gain and optimization: By performing gain processing on the signal through the amplification link, the quality and reliability of the signal can be improved, effectively enhancing the signal transmission ability and anti-interference ability.

[0082] 3. Multiple frequency conversion operations: By adopting multiple frequency conversion operations, the input signal can be effectively processed and optimized, thus ensuring a higher quality output signal that better meets the processing requirements of the receiving end.

[0083] 4. Reasonable component configuration and connection, in line with engineering practice: Components such as attenuators and filters are adopted, and through a reasonable connection method, the integrity and accuracy of the signal can be maximally retained, improving the precision and reliability of signal processing.

[0084] Generally speaking, a novel broadband receiver frequency conversion method is provided, which can solve the influence of clutter generated during the frequency conversion of a 0.4GHz - 18GHz broadband receiver on the signal purity. At the same time, through the switch matrix, a common amplification link is used, effectively saving the design volume and cost. Different from the usual broadband receiver frequency conversion methods, a very pure signal is obtained through more refined frequency segmentation and two different first frequency conversion frequencies. Compared with the usual design of multi-link amplification, in this design, through the switch matrix, a common amplification link is used, effectively saving the design volume and cost.

[0085] In the description of the present invention, it should be noted that unless otherwise clearly specified and defined, terms such as "installation", "equipped with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A frequency conversion method for a new type of broadband receiver, characterized in that, it includes: a switch matrix and an amplification link; several switches are provided in both the switch matrix and the amplification link; the switch matrix includes a first switch matrix and a second switch matrix; a decay unit and a filter; the decay unit includes a fixed attenuator and a variable attenuator; the filter includes a band-pass filter and a low-pass filter; the switch matrix and the amplification link are respectively provided with a signal input end and a signal output end; the fixed decay units are respectively arranged at the rear of the input end of the switch matrix; the amplification link further includes an amplifier and a mixer; wherein, the output end of the first switch matrix is connected to the input end of the second switch matrix through the amplification link; wherein, the signal includes frequency segments from 0.4 GHz to 18 GHz; the frequency from 0.4 GHz to 18 GHz is frequency-converted into at least 14 segments through the first switch matrix.

2. The frequency conversion method according to claim 1, characterized in that, it includes: S1: Perform the first frequency conversion through the first switch matrix and output the frequency-converted signal; S2: Perform gain on the frequency-converted signal through the amplification link; S3: Output the signal after gain after performing the second frequency conversion through the second switch matrix.

3. The frequency conversion method according to claim 2, characterized in that, S1 further includes: S11: Through the first switch matrix, perform the first frequency conversion on the input signal, and the signal is frequency-converted into at least two signal frequencies of different frequency bands; S12: Through the first switch matrix, perform the second frequency conversion on the two signal frequencies of different frequency bands respectively, and frequency-convert the input signal into at least 14 signal frequencies of different frequency bands; S13: Output the at least 14 signal frequencies of different frequency bands to the amplification link respectively through the output end of the first switch matrix; wherein, the at least 14 signal frequencies of different frequency bands share the same amplification link.

4. The frequency conversion method according to claim 3, characterized in that, the at least 14 segments included in the frequency from 0.4 GHz to 18 GHz include the following segmentation method: 0.4 GHz - 0.65 GHz, 0.65 GHz - 0.85 GHz, 0.85 GHz - 1.25 GHz, 1.25 GHz - 2 GHz, 2 GHz - 2.7 GHz, 2.7 GHz - 3.2 GHz, 3.2 GHz - 4.1 GHz, 4.1 GHz - 5.6 GHz, 5.6 GHz - 6.9 GHz, 6.9 GHz - 7.8 GHz, 7.8 GHz - 10.4 GHz, 10.4 GHz - 11.6 GHz, 11.6 GHz - 13.3 GHz, 13.3 GHz - 18 GHz.

5. The frequency conversion method according to claim 1, characterized in that, the amplification link connects the variable decay unit, the amplifier, the equalizer, the low-pass filter and the mixer in series in the above order.

6. The frequency conversion method according to claim 2, characterized in that, S3 further includes: S31: Input the signal after gain from the amplification link into the second switch matrix; S32: Convert the signal after gain into signal frequencies of at least two different frequency bands through the second switch matrix; S33: Output the signal frequencies of at least two different frequency bands separately through the output end of the second switch matrix; Wherein, the at least two signal frequencies after the second switch matrix converts the signal after gain are 22 GHz and 25 GHz respectively; Wherein, both the first switch matrix and the second switch matrix convert the signal through the band-pass filter.

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