Up-converter and microwave signal conditioning method

Abstract

The invention relates to the technical field of microwave signal conditioning, and discloses an up-converter and a microwave signal conditioning method. The up-converter comprises an input port, a channel gating unit, a frequency conversion unit, an output port, a radio frequency local oscillator unit and a control unit. The frequency conversion unit is divided into three channels according to the designed frequency band of the output signal, the three channels have different frequency bands but have cross frequencies, and the range of the cross frequencies is larger than or equal to 1 GHz; the control unit controls the channel gating unit to select a channel for signal transmission according to the frequency of the output signal; when the frequency of the output signal is equal to that of the input signal, the input signal is filtered and amplified by the selected channel to obtain an output signal, and when the frequency of the output signal is greater than that of the input signal, the input signal is filtered, converted and amplified by the selected channel to obtain an output signal. According to the invention, up-conversion and conditioning of microwave signals with limited indexes such as an ultra-wideband frequency band of 30MHz-26.5 GHz, 120dB large dynamic adjustment, 35dB low stray, 0.5 dB / 1GHz high flatness and the like can be realized.

Description

Technical Field

[0001] This invention belongs to the field of microwave signal conditioning technology, and particularly relates to an upconverter and a microwave signal conditioning method. Background Technology

[0002] To meet the needs of troop exercises, training, and special tests, and to verify the impact of various interference signals on telemetry and control missions, the signal platform of the jamming equipment must have the ability to generate and play back wideband signals. It can be deployed at appropriate locations for different equipment and different operating modes to generate traditional interference patterns such as single-tone interference signals of the same frequency as the mission or other sensitive frequencies, frequency sweep signals, bandwidth-covered random interference signals, and corresponding combination signals. The ability of each telemetry and control operating mode to resist suppression interference can be tested based on its impact on the telemetry and control mission.

[0003] With the development of communication technology, equipment is being used at increasingly higher frequencies. To meet the requirements of frequency universality and improve wartime timeliness and rapid jamming performance, jamming platforms need to possess ultra-wideband, high dynamic range, low spurious emissions, and high flatness capabilities. As an important part of the jamming platform, the microwave signal upconversion module's bandwidth, power dynamic range, spurious emissions, and flatness directly affect the overall platform's operational efficiency.

[0004] Broadband systems typically employ a combination of multiple frequency band conversion modules, with each module selected based on the time-sharing of the frequency band being used. The need for large dynamic adjustments necessitates external programmable attenuators, resulting in a large overall system size, complex control, and poor timeliness. Furthermore, poor spurious and flatness indicators negatively impact interference signal performance during broadband interference, affecting the results of exercises, training, and specialized experiments.

[0005] To address this need, there is an urgent requirement for a method that can achieve upconversion and conditioning of ultra-wideband, high dynamic range, low spurious emissions, and high flatness microwave signals. Summary of the Invention

[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing an upconverter and microwave signal conditioning method, including three-channel division, two-stage frequency conversion, three-type filter combination, segmented amplitude modulation, etc., which can achieve upconversion and conditioning of microwave signals with limiting parameters such as 30MHz~26.5GHz ultra-wideband frequency band, 120dB large dynamic adjustment, 35dB low spurious emissions, and 0.5dB / 1GHz high flatness.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] In a first aspect, the present invention provides an upconverter, comprising an input port, a channel selection unit, a frequency conversion unit, an output port, a radio frequency local oscillator unit, and a control unit; according to the design frequency band of the output signal and following the frequency division principle from low to high, the frequency conversion unit is divided into a first channel with a first frequency band, a second channel with a second frequency band, and a third channel with a third frequency band; the first frequency band and the second frequency band, as well as the second frequency band and the third frequency band, all have overlapping frequency bands, and the frequency range of the overlapping frequency bands is greater than or equal to 1 GHz;

[0009] The control unit controls the channel selection unit to select one of the first, second, or third channels based on the frequency of the output signal, which is defined as the selection channel; the input signal enters the selection channel through the input port;

[0010] When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0011] When the frequency of the output signal is greater than the frequency of the input signal, the control unit controls the radio frequency local oscillator unit to generate a local oscillator signal and send it to the gating channel. The input signal is filtered, frequency-converted, and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0012] As one possible implementation, the design frequency band is 30MHz to 26.5GHz; the first frequency band is 10MHz to 4.5GHz, the second frequency band is 3.5GHz to 18.5GHz, and the third frequency band is 17.5GHz to 26.5GHz.

[0013] As one possible implementation, the first channel is a gating channel when the frequencies of the input signal and the output signal are equal; the first channel includes a first filter, a first attenuator, a first amplifier, a second attenuator, a second amplifier, and a third attenuator connected in sequence.

[0014] As one possible implementation, both the second and third channels are gating paths where the frequency of the output signal is greater than the frequency of the input signal; in the direction of input signal transmission, the second channel includes a second filter, a third filter, a fourth attenuator, a first mixer, a fourth filter, a fifth attenuator, a third amplifier, a fifth filter, a second mixer, a first filter combination, a fourth amplifier, a sixth attenuator, a fifth amplifier, a sixth filter, a sixth amplifier, a seventh attenuator, a seventh amplifier, an eighth attenuator, and an eighth amplifier connected in sequence.

[0015] The first filter combination uses a combination of filters with different bandwidths to achieve the bandwidth range of the second channel and filter out out-of-band spurious signals.

[0016] The first mixer simultaneously receives the filtered and attenuated input signal and the first local oscillator signal provided by the RF local oscillator unit, and then mixes them to obtain the second channel primary frequency conversion signal.

[0017] The second mixer simultaneously receives the second channel primary frequency conversion signal (after being filtered, attenuated, and amplified) and the second local oscillator signal provided by the RF local oscillator unit, and then mixes them to obtain the second channel secondary frequency conversion signal; the frequency of the second channel secondary frequency conversion signal is equal to that of the output signal.

[0018] As one possible implementation, the second, fifth, and sixth filters are planar filters; the third and fourth filters are cavity filters; and the attenuators in the second channel are all digitally controlled attenuators.

[0019] In the direction of input signal transmission, the third channel includes a seventh filter, an eighth filter, a ninth attenuator, a third mixer, a ninth filter, a tenth attenuator, an eighth amplifier, a tenth filter, a fourth mixer, a second filter combination, a ninth amplifier, an eleventh attenuator, a tenth amplifier, an eleventh filter, an eleventh amplifier, a twelfth attenuator, a twelfth amplifier, a thirteenth attenuator, and a thirteenth amplifier connected in sequence.

[0020] The second filter combination uses a combination of filters with different bandwidths to achieve the bandwidth range of the third channel and filter out out-of-band spurious signals.

[0021] The third mixer simultaneously receives the filtered and attenuated input signal before it and the first local oscillator signal provided by the RF local oscillator unit, and then mixes them to obtain the third channel primary frequency conversion signal.

[0022] The fourth mixer simultaneously receives the first-conversion signal of the third channel after it has been filtered, attenuated and amplified, as well as the second local oscillator signal provided by the RF local oscillator unit, and then mixes them to obtain the second-conversion signal of the third channel. The frequency of the second-conversion signal of the third channel is equal to that of the output signal.

[0023] As one possible implementation, the seventh, tenth, and eleventh filters are all planar filters; the eighth and ninth filters are both cavity filters; and the second filter combination consists of N cavity filters connected in parallel.

[0024] The first local oscillator signal is filtered and amplified sequentially by the first MEMS filter and the fourteenth amplifier before being sent to the third mixer.

[0025] The second local oscillator signal is filtered by the second MEMS filter and then sent to the fourth mixer.

[0026] In a second aspect, the present invention provides a microwave signal conditioning method, which utilizes the upconverter provided in the first aspect. The microwave signal conditioning method includes the following steps:

[0027] S10. The input port receives input signals;

[0028] S11. The control unit controls the channel selection unit to select any one of the first, second, or third channels based on the frequency of the output signal, which is defined as the selected channel;

[0029] S12. The input signal enters the gating channel, and is filtered and amplified by the gating channel, or filtered, amplified and frequency-converted by the gating channel to obtain the output signal, which is then output through the output port.

[0030] As one possible implementation, S12 specifically includes the following steps:

[0031] When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0032] When the frequency of the output signal is greater than the frequency of the input signal, the control unit controls the radio frequency local oscillator unit to generate a local oscillator signal and send it to the gating channel. The input signal is filtered, frequency-converted, and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0033] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0034] 1. The upconverter provided by the present invention divides the ultra-wideband microwave signal into three channels with different frequency bands, and the three channels have cross frequencies with each other. The range of cross frequencies is greater than or equal to 1GHz, which can ensure that any frequency point meets the usage requirements of 1GHz ultra-wideband. It can achieve full signal coverage within 1GHz bandwidth while realizing upconversion of ultra-wideband signals.

[0035] 2. The upconverter provided by this invention has multiple levels of amplification and attenuation in each channel, achieving a large dynamic range adjustment of 120dB power.

[0036] 3. The upconverter provided by this invention adopts a combination of multiple types of filters, which can make full use of the different characteristics of each type of filter to achieve filtering of intermediate frequency input signal, primary frequency conversion signal and secondary frequency conversion signal in the channel, effectively suppress out-of-band spurious index, and achieve a high flatness index of <0.5dB / 1GHz across the entire frequency band. Attached Figure Description

[0037] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0038] Figure 1 This is a schematic diagram of the up-converter structure in an embodiment of the present invention;

[0039] Figure 2 This is a schematic diagram of the first channel in an embodiment of the present invention;

[0040] Figure 3 This is a schematic diagram of the second channel in an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the suppression of the first spurious frequency in the second channel in an embodiment of the present invention;

[0042] Figure 5 This is a schematic diagram of the second spurious frequency suppression in the second channel in an embodiment of the present invention.

[0043] Figure 6 This is a schematic diagram of the third channel in an embodiment of the present invention;

[0044] Figure 7 This is a schematic diagram of the suppression of the first spurious frequency in the third channel in an embodiment of the present invention;

[0045] Figure 8 This is a schematic diagram of the suppression of the second spurious frequency in the third channel in an embodiment of the present invention;

[0046] Figure 9 This is a flowchart of the microwave signal conditioning method in an embodiment of the present invention.

[0047] Figure Labels

[0048] 1-Input port, 2-Channel selection unit;

[0049] 3- Frequency converter unit, 30- First channel, 3000- First filter, 3001- First attenuator, 3002- First amplifier, 3003- Second attenuator, 3004- Second amplifier, 3005- Third attenuator;

[0050] 31-Second Channel, 3100-Second Filter, 3101-Third Filter, 3102-Fourth Attenuator, 3103-First Mixer, 3104-Fourth Filter, 3105-Fifth Attenuator, 3106-Third Amplifier, 3107-Fifth Filter, 3108-Second Mixer, 3109-First Filter Combination, 31090-Filter One, 31091-Filter Two, 31092-Filter Three, 31093-Filter Four, 31094-Filter Five, 3110-Fourth Amplifier, 3111-Sixth Attenuator, 3112-Fifth Amplifier, 3113-Sixth Filter, 3114-Sixth Amplifier, 3115-Seventh Attenuator, 3116-Seventh Amplifier, 3117-Eighth Attenuator, 3118-Eighth Amplifier, 3119-First Narrowband Filter, 3120-Second Narrowband Filter;

[0051] 32-Third Channel, 3200-Seventh Filter, 3201-Eighth Filter, 3202-Ninth Attenuator, 3203-Third Mixer, 3204-Ninth Filter, 3205-Tenth Attenuator, 3206-Eighth Amplifier, 3207-Tenth Filter, 3208-Fourth Mixer, 3209-Second Filter Combination, 32090-Filter Six, 32091-Filter Seven, 32092-Filter Eight, 32093-Filter Nine, 3210-Ninth Amplifier, 3211-Eleventh Attenuator, 3212-Tenth Amplifier, 3213-Eleventh Filter, 3214-Eleventh Amplifier, 3215-Twelfth Attenuator, 3216-Twelfth Amplifier, 3217-Thirteenth Attenuator, 3218-Thirteenth Amplifier, 3219-First MEMS Filter, 3220-Fourteenth Amplifier, 3221-Second MEMS Filter;

[0052] 4-Output port, 5-RF local oscillator unit, 6-Control unit. Detailed Implementation

[0053] To facilitate a clear description of the technical solutions in the embodiments of the present invention, the terms "first" and "second" are used to distinguish identical or similar items with essentially the same function and effect. For example, the first threshold and the second threshold are merely used to distinguish different thresholds and do not limit their order. Those skilled in the art will understand that the terms "first" and "second" do not limit the quantity or execution order, and that the terms "first" and "second" are not necessarily different.

[0054] It should be noted that in this invention, the terms "exemplary" or "for example" are used to indicate examples, illustrations, or descriptions. Any embodiment or design described as "exemplary" or "for example" in this invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of terms such as "exemplary" or "for example" is intended to present the relevant concepts in a concrete manner.

[0055] In this invention, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone, where A and B can be singular or plural. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "At least one" or similar expressions refer to any combination of these items, including any combination of singular or plural items. For example, "at least one of a, b, or c" can represent: a, b, c, a combination of a and b, a combination of a and c, a combination of b and c, or a, b, and c, where a, b, and c can be single or multiple.

[0056] This invention proposes a method for upconverting and conditioning microwave signals with ultra-wideband, large dynamic range, low spurious emissions, and high flatness.

[0057] In a first aspect, the present invention provides an up-converter, see [link to previous document]. Figure 1 It includes input port 1, channel selection unit 2, frequency conversion unit 3, output port 4, radio frequency local oscillator unit 5, and control unit 6;

[0058] Among them, the radio frequency local oscillator unit 5 has two digital frequency synthesizer chips with the same function. The digital frequency synthesizer is controlled by the control unit 6 and is used to generate the local oscillator signal required by the channel gating unit frequency conversion according to the input signal.

[0059] According to the design frequency band of the output signal, the frequency conversion unit 3 is divided into a first channel 30 with a first frequency band, a second channel 31 with a second frequency band, and a third channel 32 with a third frequency band, based on the principle of dividing the frequency from low to high. The first frequency band and the second frequency band, as well as the second frequency band and the third frequency band, all have cross frequencies, and the range of the cross frequencies is greater than or equal to 1 GHz.

[0060] As one possible implementation, the design frequency band is 30MHz to 26.5GHz. Based on the principle of filtering out spurious signals, the entire design frequency band is divided into three bands: the first band is 10MHz to 4.5GHz, the second band is 3.5GHz to 18.5GHz, and the third band is 17.5GHz to 26.5GHz. The frequency range of the overlapping bands of the three bands is ≥1GHz, which can ensure that the bandwidth of any frequency point is ≥1GHz, and achieve full signal coverage within the 1GHz bandwidth.

[0061] See Figure 1 The control unit 6 controls the channel selection unit 2 to select one of the first channel 30, the second channel 31, or the third channel 32 according to the frequency of the output signal, which is defined as the selection channel; the input signal enters the selection channel through the input port 1;

[0062] This invention enables upconversion and conditioning of microwave signals in the 30MHz to 26.5GHz ultra-wideband frequency band. It divides the signal into three channels with different frequency bands according to the principle of frequency from low to high. The control unit controls the channel selection unit to select the channel according to the frequency of the output signal, which can easily switch the channel and ensure that the selected channel, local oscillator frequency and the final output frequency correspond to each other, so as to realize accurate and reliable switching and output of radio frequency signals.

[0063] When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0064] See Figure 2 As one possible implementation, the first channel 30 is a gating channel when the frequencies of the input signal and the output signal are equal; the first channel 30 includes a first filter 3000, a first attenuator 3001, a first amplifier 3002, a second attenuator 3003, a second amplifier 3004, and a third attenuator 3005 connected in sequence.

[0065] As an example, the first filter 3000 is a planar filter, and the first attenuator 3001, the second attenuator 3003 and the third attenuator 3005 are all digitally controlled attenuators. The input signal and output signal frequency band of the first channel 30 are both 30MHz to 4GHz. The signal does not undergo frequency conversion. The input signal is output after passing through a filter, three attenuators and two amplifiers. The use of three attenuation and two amplification can achieve a large dynamic adjustment of 110dB while reducing the link insertion loss when there is no adjustment.

[0066] When the frequency of the output signal is greater than the frequency of the input signal, the control unit 6 controls the radio frequency local oscillator unit 5 to generate a local oscillator signal and send it to the gating channel. The input signal is filtered, frequency-converted and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0067] As one possible implementation, both the second channel 31 and the third channel 32 are gating paths where the frequency of the output signal is greater than the frequency of the input signal; see [link to relevant documentation]. Figure 3 In the direction of input signal transmission, the second channel 31 includes a second filter 3100, a third filter 3101, a fourth attenuator 3102, a first mixer 3103, a fourth filter 3104, a fifth attenuator 3105, a third amplifier 3106, a fifth filter 3107, a second mixer 3108, a first filter combination 3109, a fourth amplifier 3110, a sixth attenuator 3111, a fifth amplifier 3112, a sixth filter 3113, a sixth amplifier 3114, a seventh attenuator 3115, a seventh amplifier 3116, an eighth attenuator 3117, and an eighth amplifier 3118 connected in sequence.

[0068] As one possible implementation, the second filter 3100, the fifth filter 3107 and the sixth filter 3113 are planar filters; the third filter 3101 and the fourth filter 3104 are cavity filters; and the attenuators in the second channel 31 are all digitally controlled attenuators.

[0069] See Figure 3 The first filter combination 3109 consists of five filters with different bandwidths to achieve the bandwidth range matching of the second channel 31 and filter out out-of-band spurious signals. The bandwidths of the five filters are as follows: Filter 1 31090 (2.7-4.6GHz), Filter 2 31091 (3.6-6.1GHz), Filter 3 31092 (5.1-8.9GHz), Filter 4 31093 (7.9-13.8GHz), and Filter 5 31094 (12.8-18GHz). The performance indicators of the first filter combination 3109 are shown in Table 1.

[0070] Table 1 Performance Indicators of the First Filter Combination

[0071]

[0072]

[0073] The first mixer 3103 simultaneously receives the input signal that has been filtered and attenuated before it and the first local oscillator signal provided by the radio frequency local oscillator unit 5, and then mixes them to obtain the second channel primary frequency conversion signal.

[0074] The second mixer 3108 simultaneously receives the second channel primary frequency conversion signal (after being filtered, attenuated, and amplified) and the second local oscillator signal provided by the RF local oscillator unit 5, and then mixes them to obtain the second channel secondary frequency conversion signal; the frequency of the second channel secondary frequency conversion signal is equal to that of the output signal.

[0075] See Figure 3 As an example, the first local oscillator signal passes through a first narrowband filter 3119 before entering the first mixer 3103, and the second local oscillator signal passes through a second narrowband filter 3120 before entering the second mixer 3108, so as to fully suppress spurious frequencies.

[0076] The second channel 31 uses a combination of planar filters and cavity filters, which can make full use of the different characteristics of the two types of filters. For example, planar filters have low stopband suppression and poor rectangular coefficients; cavity filters have low insertion loss, good stopband suppression, and high frequency accuracy. This enables filtering of the intermediate frequency input signal, the first-conversion signal of the second channel, and the second-conversion signal of the second channel, effectively reducing out-of-band spurious signals.

[0077] See Figures 3 to 4 The first spurious frequency of the second channel 31 is located in the mixing component of the input signal after pre-filtering and attenuation and the first local oscillator signal. This frequency is suppressed by the spurious suppression index of the first mixer 3103 and the out-of-band suppression index of the narrowband filter 3120 before the second mixer 3108. The first mixer 3103 suppresses by 35dB and the narrowband filter 3120 suppresses by 10dB, together producing a 45dB suppression.

[0078] See Figure 3 and Figure 5 The second spurious frequency of the second channel 31 is located at the leakage of the first local oscillator signal and its mixing component. This frequency is suppressed by the out-of-band suppression index of the narrowband filter 3120 before the second mixer 3108. The narrowband filter 3120 can produce a suppression degree of more than 35dB.

[0079] The second channel 31 contains a five-stage digitally controlled attenuator, achieving a power attenuation of 120dB and allowing for a maximum power dynamic range adjustment of 120dB. After the input signal is filtered, attenuated, and amplified by the devices in the second channel 31, out-of-band spurious signals in the final output signal are further reduced. For example, see [link to example]. Figure 3 To ensure signal flatness within the frequency band, an equalizer is designed within the link to adjust the link flatness.

[0080] See Figure 6As one possible implementation, in the direction of input signal transmission, the third channel 32 includes a seventh filter 3200, an eighth filter 3201, a ninth attenuator 3202, a third mixer 3203, a ninth filter 3204, a tenth attenuator 3205, an eighth amplifier 3206, a tenth filter 3207, a fourth mixer 3208, a second filter combination 3209, a ninth amplifier 3210, an eleventh attenuator 3211, a tenth amplifier 3212, an eleventh filter 3213, an eleventh amplifier 3214, a twelfth attenuator 3215, a twelfth amplifier 3216, a thirteenth attenuator 3217, and a thirteenth amplifier 3218 connected in sequence.

[0081] The second filter combination 3209 consists of four filters with different bandwidths to achieve the bandwidth range matched by the third channel 32, filtering out out-of-band spurious signals. The bandwidths of the four filters are: filter six 32090 (19-19GHz), filter seven 32091 (18-22GHz), filter eight 32092 (21-25GHz), and filter nine 32093 (24-26.5GHz). The performance specifications of the second filter combination are shown in Table 2.

[0082] Table 2 Performance Indicators of the Second Filter Combination

[0083]

[0084] The third mixer 3203 simultaneously receives the input signal after filtering and attenuation in front of it and the first local oscillator signal provided by the RF local oscillator unit 5, and then mixes them to obtain the third channel primary frequency conversion signal.

[0085] The fourth mixer 3208 simultaneously receives the first-conversion signal of the third channel after it has been filtered, attenuated and amplified, as well as the second local oscillator signal provided by the RF local oscillator unit 5, and then mixes them to obtain the second-conversion signal of the third channel. The frequency of the second-conversion signal of the third channel is equal to that of the output signal.

[0086] As one possible implementation, the seventh filter 3200, the tenth filter 3207, and the eleventh filter 3213 are all planar filters; the eighth filter 3201 and the ninth filter 3204 are both cavity filters; and the second filter combination 3209 consists of N cavity filters connected in parallel.

[0087] See Figure 6 The first local oscillator signal is filtered and amplified sequentially by the first MEMS filter 3219 and the fourteenth amplifier 3220 before being sent to the third mixer 3203;

[0088] The second local oscillator signal is filtered by the second MEMS filter 3221 and then sent to the fourth mixer 3208.

[0089] The third channel 32 employs a combination of planar filters, MEMS filters, and cavity filters, which can fully utilize the different characteristics of each type of filter. For example, planar filters have low stopband suppression and poor rectangular coefficients; MEMS filters have high insertion loss and good stopband suppression; and cavity filters have low insertion loss, good stopband suppression, and high frequency accuracy. This enables filtering of the intermediate frequency input signal, the first-conversion signal of the third channel, and the second-conversion signal of the third channel, effectively reducing out-of-band spurious signals.

[0090] See Figure 7 The first spurious frequency of the third channel 32 is located in the mirror mixing component of the input signal after pre-filtering and attenuation and the first local oscillator signal. This frequency is suppressed by the out-of-band suppression index of the first MEMS filter 3219 before the third mixer 3203. The first MEMS filter 3219 can produce a suppression degree of more than 35dB.

[0091] See Figure 8 The second spurious frequency of the third channel 32 is located in the mixing component of the input signal after pre-filtering and attenuation and the second local oscillator signal. This frequency is suppressed by the out-of-band suppression index of the second MEMS filter 3221 before the fourth mixer 3208 and the suppression index of the fourth mixer 3208. The second MEMS filter 3221 can produce a suppression degree of more than 30dB, and the fourth mixer 3208 suppresses 10dB, together producing a 40dB suppression.

[0092] The third channel 32 contains a five-stage digitally controlled attenuator, achieving a power attenuation of 120dB and allowing for dynamic adjustment of the maximum power range of 120dB. After the input signal is filtered, attenuated, and amplified by the devices in the third channel 32, out-of-band spurious signals in the final output signal are further reduced. For example, see [link to example]. Figure 6 To ensure signal flatness within the frequency band, an equalizer is designed within the link to adjust the link flatness.

[0093] See Figure 2 , Figure 3 and Figure 6 The present invention has a switch on each channel main link, and switches are also set before and after the first filter combination 3109 and the second filter combination 3209, which can more flexibly select the selection channel, and can select the filter to use according to the different performance indicators of each filter, making it convenient and highly flexible to use.

[0094] Secondly, this invention provides a microwave signal conditioning method, which utilizes the upconverter provided in the first aspect, see [link to first aspect]. Figure 9The microwave signal conditioning method includes the following steps:

[0095] S10. The input port receives input signals;

[0096] S11. The control unit controls the channel selection unit to select any one of the first, second, or third channels based on the frequency of the output signal, which is defined as the selected channel;

[0097] S12. The input signal enters the gating channel, and is filtered and amplified by the gating channel, or filtered, amplified and frequency-converted by the gating channel to obtain the output signal, which is then output through the output port.

[0098] As one possible implementation, S12 specifically includes the following steps:

[0099] When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0100] When the frequency of the output signal is greater than the frequency of the input signal, the control unit controls the radio frequency local oscillator unit to generate a local oscillator signal and send it to the gating channel. The input signal is filtered, frequency-converted, and amplified by the gating channel to obtain the output signal, and the output signal is output through the output port.

[0101] Although the invention has been described herein in conjunction with various embodiments, those skilled in the art will understand and implement other variations of the disclosed embodiments by reviewing the accompanying drawings, disclosure, and other materials. In this specification, the word "comprising" does not exclude other components or steps, and "a" or "an" does not exclude multiple components. A single processor or other unit can implement several of the functions listed in the specification. While certain measures are described in different embodiments, this does not mean that these measures cannot be combined to produce good results.

[0102] Although the invention has been described in conjunction with specific features and embodiments, it is obvious that various modifications and combinations can be made therein without departing from the spirit and scope of the invention. Accordingly, this specification and drawings are merely illustrative of the invention and are considered to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. Clearly, those skilled in the art can make various alterations and modifications to the invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the invention and its equivalents, the invention is also intended to include such modifications and modifications.

Claims

1. An up-converter, characterized in that: It includes an input port, a channel gating unit, a frequency conversion unit, an output port, a radio frequency local oscillator unit and a control unit; according to the design frequency band of the output signal and the principle of dividing the frequency from low to high, the frequency conversion unit is divided into a first channel with a first frequency band, a second channel with a second frequency band and a third channel with a third frequency band; the first frequency band and the second frequency band, as well as the second frequency band and the third frequency band, have crossover frequency bands, and the frequency range of the crossover frequency bands is greater than or equal to 1 GHz; The control unit controls the channel gating unit to select one of the first channel, the second channel or the third channel according to the frequency of the output signal, which is defined as the gating channel; the input signal enters the gating channel through the input port; When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the selection channel to obtain the output signal, and the output signal is output through the output port; When the frequency of the output signal is greater than the frequency of the input signal, the control unit controls the RF local oscillator unit to generate a local oscillator signal and sends it to the selection channel. The input signal is filtered, frequency-converted, and amplified by the selection channel to obtain an output signal, which is output through the output port.

2. The up-converter according to claim 1, characterized in that: The designed frequency band is 30MHz to 26.5GHz; the first frequency band is 10M to 4.5GHz, the second frequency band is 3.5GHz to 18.5GHz; and the third frequency band is 17.5GHz to 26.5GHz.

3. The up-converter according to claim 1, characterized in that: The first channel is a selection channel when the frequencies of the input signal and the output signal are equal; the first channel includes a first filter, a first attenuator, a first amplifier, a second attenuator, a second amplifier, and a third attenuator connected in sequence.

4. The up-converter according to claim 3, characterized in that: The first filter is a planar filter, and the first attenuator, the second attenuator and the third attenuator are all digitally controlled attenuators.

5. The up-converter according to claim 1, characterized in that: The second channel and the third channel are both selection paths whose output signal frequency is greater than the input signal frequency; in the transmission direction of the input signal, the second channel comprises a second filter, a third filter, a fourth attenuator, a first mixer, a fourth filter, a fifth attenuator, a third amplifier, a fifth filter, a second mixer, a first filter combination, a fourth amplifier, a sixth attenuator, a fifth amplifier, a sixth filter, a sixth amplifier, a seventh attenuator, a seventh amplifier, an eighth attenuator and an eighth amplifier connected in sequence; Wherein, the first filter combination is a combination of filters with different bandwidths to achieve a bandwidth range matched by the second channel and filter out out-of-band spurious; The first mixer simultaneously receives the input signal after filtering and attenuation in the front path and the first local oscillator signal provided by the radio frequency local oscillator unit and mixes them to obtain the first frequency conversion signal of the second channel; The second mixer simultaneously receives the second channel primary frequency conversion signal after filtering, attenuation and amplification in the front path and the second local oscillator signal provided by the RF local oscillator unit and mixes them to obtain the second channel secondary frequency conversion signal; the frequency of the second channel secondary frequency conversion signal is equal to that of the output signal.

6. The up-converter according to claim 5, characterized in that: The second filter, the fifth filter and the sixth filter are planar filters; the third filter and the fourth filter are cavity filters; and the attenuators in the second channel are all digitally controlled attenuators.

7. The up-converter according to claim 1, characterized in that: In the transmission direction of the input signal, the third channel includes a seventh filter, an eighth filter, a ninth attenuator, a third mixer, a ninth filter, a tenth attenuator, an eighth amplifier, a tenth filter, a fourth mixer, a second filter combination, a ninth amplifier, an eleventh attenuator, a tenth amplifier, an eleventh filter, an eleventh amplifier, a twelfth attenuator, a twelfth amplifier, a thirteenth attenuator and a thirteenth amplifier connected in sequence; The second filter combination is composed of filters with different bandwidths to achieve a bandwidth range matched by the third channel and filter out out-of-band spurious. The third mixer simultaneously receives the input signal after filtering and attenuation in the front path and the first local oscillator signal provided by the RF local oscillator unit and mixes them to obtain a third channel primary frequency conversion signal; The fourth mixer simultaneously receives the third channel primary frequency conversion signal after filtering, attenuation and amplification in its front path and the second local oscillation signal provided by the RF local oscillator unit and mixes them to obtain the third channel secondary frequency conversion signal, and the frequency of the third channel secondary frequency conversion signal is equal to that of the output signal.

8. The up-converter according to claim 7, characterized in that: The seventh filter, the tenth filter and the eleventh filter are all planar filters; the eighth filter and the ninth filter are all cavity filters; the second filter combination is N cavity filters connected in parallel; The first local oscillator signal is filtered and amplified by the first MEMS filter and the fourteenth amplifier in sequence and then sent to the third mixer; The second local oscillation signal is filtered by the second MEMS filter and then sent to the fourth mixer.

9. A microwave signal conditioning method, characterized in that: Using the up-converter according to any one of claims 1 to 8, the microwave signal conditioning method comprises the following steps: S10. The input port receives an input signal; S11. The control unit controls the channel gating unit to select any one of the first channel, the second channel or the third channel according to the frequency of the output signal, which is defined as the gating channel; S12. The input signal enters the selection channel, is filtered and amplified by the selection channel, or, is filtered, amplified, and frequency-converted by the selection channel to obtain the output signal, and the output signal is output through the output port.

10. The microwave signal conditioning method according to claim 9, characterized in that: The S12 specifically includes the following steps: When the frequency of the output signal is equal to the frequency of the input signal, the input signal is filtered and amplified by the selection channel to obtain the output signal, and the output signal is output through the output port; When the frequency of the output signal is greater than the frequency of the input signal, the control unit controls the RF local oscillator unit to generate a local oscillator signal and sends it to the selection channel. The input signal is filtered, frequency-converted, and amplified by the selection channel to obtain an output signal, which is output through the output port.

Images