阅读说明：本技术 一种毫米波下变频组件 (Millimeter wave down conversion subassembly ) 是由 杨光华 寇小兵 李进阳 张发成 尹红波 张得才 陈坤 于 2020-05-13 设计创作，主要内容包括：本发明公开了一种毫米波下变频组件。该组件包括多路开关滤波单元、变频单元和中频滤波放大单元,其中多路开关滤波单元用于对接收的外部0.3-18GHz超宽带信号进行分段滤波,滤除冗余的谐波信号及镜像信号；变频单元用于将滤波后的0.3-18GHz超宽带信号上变频到毫米波频段,滤除镜像杂散,然后下变频到中频频段；中频滤波放大单元用于对中频频段的信号进行滤波放大处理,输出所需的信号。本发明提高了毫米波接收系统的可靠性,且具有小型化、高集成度的优点。(The invention discloses a millimeter wave down-conversion component. The component comprises a multi-way switch filtering unit, a frequency conversion unit and an intermediate frequency filtering amplification unit, wherein the multi-way switch filtering unit is used for carrying out segmented filtering on a received external 0.3-18GHz ultra-wideband signal and filtering redundant harmonic signals and image signals; the frequency conversion unit is used for up-converting the filtered 0.3-18GHz ultra-wideband signal to a millimeter wave frequency band, filtering out mirror stray, and then down-converting the filtered signal to an intermediate frequency band; the intermediate frequency filtering and amplifying unit is used for filtering and amplifying the signals of the intermediate frequency band and outputting the required signals. The invention improves the reliability of the millimeter wave receiving system and has the advantages of miniaturization and high integration degree.)

1. A millimeter wave down-conversion component is characterized by comprising a multi-way switch filtering unit, a frequency conversion unit and an intermediate frequency filtering amplification unit;

the multi-way switch filtering unit is used for carrying out segmented filtering on the received external 0.3-18GHz ultra-wideband signals and filtering redundant harmonic signals and image signals;

the frequency conversion unit is used for up-converting the filtered 0.3-18GHz ultra-wideband signal to a millimeter wave frequency band, filtering out mirror stray, and then down-converting the filtered signal to an intermediate frequency band;

and the intermediate frequency filtering and amplifying unit is used for filtering and amplifying the signals of the intermediate frequency band and outputting the required signals.

2. The millimeter wave down conversion assembly according to claim 1, wherein the multi-way switch filtering unit comprises a two-stage multi-way selector switch and a multi-stage band-pass filter (1), wherein the multi-stage band-pass filter (1) comprises a dielectric band-pass filter, a cavity band-pass filter and a MEMS band-pass filter.

3. The millimeter wave down conversion assembly according to claim 1, wherein the frequency conversion unit comprises a frequency multiplier (5), a first frequency multiplier amplifier (4), a first high pass filter (3), a first mixer (2), a second high pass filter (6), a low noise amplifier (7), a first single-pole double-throw switch (8), a second single-pole double-throw switch (9), a second radio frequency amplifier (12), a second mixer (13) and a first radio frequency amplifier (14) which are connected in sequence, wherein a first millimeter wave band-pass filter (10) and a second millimeter wave band-pass filter (11) are arranged in parallel between the first single-pole double-throw switch (8) and the second single-pole double-throw switch (9); the frequency multiplier (5), the first frequency multiplier amplifier (4) and the first high-pass filter (3) are arranged on a local oscillation port link of the first frequency mixer (2), and the first radio frequency amplifier (14) is arranged on a local oscillation link of the second frequency mixer (13).

4. The millimeter wave down conversion assembly according to claim 1, wherein the intermediate frequency filtering and amplifying unit comprises a low pass filter (15), a first intermediate frequency amplifier (16), a digitally controlled attenuator (17), an equalizer (18), a second intermediate frequency amplifier (19), a temperature compensating attenuator (20), a third intermediate frequency amplifier (21) and a third band pass filter (22) which are connected in sequence.

5. The millimeter wave down conversion assembly according to claim 3, wherein the first high pass filter (3) is a ceramic filter and is connected to a local oscillation port of the first mixer (2) in the frequency conversion unit, so as to filter out a fundamental wave signal of the first local oscillation signal.

6. A millimeter wave down conversion module according to claim 3, wherein the second high pass filter (6) is used to filter out the rf and lo signals carried by the first mixer (2), and the resulting signals are fed to the low noise amplifier (7) in the subsequent link.

7. The millimeter wave down conversion assembly according to claim 3, wherein the frequency conversion unit divides an input radio frequency signal into two sections, and the two sections are respectively mixed with a local oscillator signal with a frequency doubled in the first mixer (2) to obtain two millimeter wave intermediate frequency signals, and the two high and intermediate frequency signals are respectively filtered by a filtering part composed of the first single-pole double-throw switch (8), the second single-pole double-throw switch (9), the first millimeter wave band-pass filter (10) and the second millimeter wave band-pass filter (11) to obtain the intermediate frequency signals.

8. The millimeter wave down conversion assembly according to claim 3, wherein the second mixer (13) is configured to mix the two millimeter wave high/intermediate frequency signals with the second local oscillator signal 22.2/28.2GHz to obtain the desired low/intermediate frequency signal.

9. The millimeter wave down conversion assembly according to claim 4, wherein a digitally controlled attenuator (17) and an equalizer (18) are arranged between the first intermediate frequency amplifier (16) and the second intermediate frequency amplifier (19) for adjusting the amplitude of the signal.

10. The millimeter wave down conversion package of claim 4, wherein the temperature compensated attenuator (20) is used to adjust the temperature characteristics of the entire package.

Technical Field

The invention relates to the technical field of electromagnetic fields and microwaves, in particular to a millimeter wave down-conversion component.

Background

In microwave transceiving systems such as radar and communication, a down-conversion component plays a vital role, and is used for down-converting a received high-frequency signal into a low-intermediate-frequency signal and outputting the low-intermediate-frequency signal to a subsequent digital processing part so as to perform work such as signal processing analysis.

The existing down-conversion component processes the ultra-wideband input signal of 0.38-18GHz in two sections, wherein the first section directly amplifies and filters the low-frequency part starting from 0.38GHz without frequency conversion and outputs the low-frequency part to subsequent digital processing, namely direct acquisition; in the second stage, the rest high-frequency part is subjected to frequency conversion processing to obtain a low-intermediate frequency signal, and the low-intermediate frequency signal is output to a subsequent digital processing part. The two-stage processing approach increases the complexity of the digital processing portion and also reduces the reliability of the overall receiving system.

Disclosure of Invention

The invention aims to provide a millimeter wave down-conversion component which is high in reliability, small in size, high in integration level and ultra-wide in band.

The technical solution for realizing the purpose of the invention is as follows: a millimeter wave down-conversion component comprises a multi-way switch filtering unit, a frequency conversion unit and an intermediate frequency filtering and amplifying unit;

the multi-way switch filtering unit is used for carrying out segmented filtering on the received external 0.3-18GHz ultra-wideband signals and filtering redundant harmonic signals and image signals;

the frequency conversion unit is used for up-converting the filtered 0.3-18GHz ultra-wideband signal to a millimeter wave frequency band, filtering out mirror stray, and then down-converting the filtered signal to an intermediate frequency band;

and the intermediate frequency filtering and amplifying unit is used for filtering and amplifying the signals of the intermediate frequency band and outputting the required signals.

Furthermore, the multi-way switch filtering unit comprises a two-stage multi-way selection switch and a multi-stage band-pass filter, wherein the multi-stage band-pass filter comprises a dielectric band-pass filter, a cavity band-pass filter and an MEMS band-pass filter.

Further, the frequency conversion unit comprises a frequency multiplier, a first frequency multiplier amplifier, a first high-pass filter, a first mixer, a second high-pass filter, a low noise amplifier, a first single-pole double-throw switch, a second radio-frequency amplifier, a second mixer and a first radio-frequency amplifier which are connected in sequence, wherein a first millimeter wave band-pass filter and a second millimeter wave band-pass filter are arranged between the first single-pole double-throw switch and the second single-pole double-throw switch in parallel; the frequency multiplier, the first frequency multiplication amplifier and the first high-pass filter are arranged on a first mixer local oscillation port link, and the first radio frequency amplifier is arranged on a second mixer local oscillation link.

Further, the intermediate frequency filtering and amplifying unit comprises a low pass filter, a first intermediate frequency amplifier, a numerical control attenuator, an equalizer, a second intermediate frequency amplifier, a temperature compensation attenuator, a third intermediate frequency amplifier and a third band pass filter which are connected in sequence.

Furthermore, the first high-pass filter adopts a ceramic filter, is connected to a local oscillator port of a first frequency mixer in the frequency conversion unit, and is used for filtering fundamental wave signals of the first local oscillator signals.

Further, the second high-pass filter is used for filtering out radio frequency and local oscillation signals carried by the first mixer, and the obtained signals enter a low-noise amplifier in a subsequent link.

Furthermore, the frequency conversion unit divides the input radio frequency signal into two sections, mixes the two sections with the local oscillation signal with twice frequency in the first mixer respectively to obtain two millimeter wave intermediate frequency signals, and filters the two high and intermediate frequency signals respectively to obtain the intermediate frequency signal, wherein the filtering section consists of the first single-pole double-throw switch, the second single-pole double-throw switch, the first millimeter wave band-pass filter and the second millimeter wave band-pass filter.

Further, the second mixer is configured to mix the two millimeter wave high-intermediate frequency signals with a second local oscillator signal of 22.2/28.2GHz to obtain a required low-intermediate frequency signal.

And further, a numerical control attenuator and an equalizer are arranged between the first intermediate frequency amplifier and the second intermediate frequency amplifier and used for adjusting the amplitude of the signal.

Further, the temperature compensating attenuator is used to adjust the temperature characteristics of the entire assembly.

Compared with the prior art, the invention has the remarkable advantages that: (1) the whole section of radio frequency input signals are uniformly down-converted to low intermediate frequency, a fixed intermediate frequency signal is output, subsequent digital processing is facilitated, the complexity of digital processing work is reduced, and the reliability of the whole receiving system is improved; (2) the high-frequency filter in the multistage band-pass filter adopts an MEMS band-pass filter, and the first high-pass filter in the frequency conversion unit adopts a ceramic filter, so that the size is small, and the integration level is high.

Drawings

Fig. 1 is a block diagram of a millimeter wave down conversion module according to the present invention.

In the figure: 1. a multi-stage band-pass filter; 2. a first mixer; 3. a first high-pass filter; 4. a first frequency multiplier amplifier; 5. a frequency multiplier; 6. a second high pass filter; 7. a low noise amplifier; 8. a first single pole double throw switch; 9. a second single pole double throw switch; 10. a first millimeter wave band-pass filter; 11. a second millimeter wave band-pass filter; 12. a second radio frequency amplifier; 13. a second mixer; 14. a first radio frequency amplifier; 15. a low-pass filter; 16. a first intermediate frequency amplifier; 17. a numerical control attenuator; 18. an equalizer; 19. a second intermediate frequency amplifier; 20. a temperature compensating attenuator; 21. a third intermediate frequency amplifier; 22. a third band pass filter.

Detailed Description

The technical solution of the present invention is further described in detail with reference to the accompanying drawings and specific embodiments.

With reference to fig. 1, the millimeter wave down conversion module of the present invention includes a multi-way switch filtering unit, a frequency conversion unit and an intermediate frequency filtering amplification unit;

the multi-channel switch filtering unit is used for carrying out segmented filtering on the received external 0.3-18GHz ultra-wideband signals and filtering redundant harmonic signals and image signals, so that no false indexes of the intermediate frequency in the whole section meet the index requirement, namely only a required main signal and no other redundant signals exist in the output signals;

the frequency conversion unit is used for up-converting the filtered 0.3-18GHz ultra-wideband signal to a millimeter wave frequency band, filtering out mirror stray, and then down-converting the filtered signal to an intermediate frequency band;

and the intermediate frequency filtering and amplifying unit is used for filtering and amplifying the signals of the intermediate frequency band and outputting the required signals.

Further, the multi-way switch filtering unit comprises a two-stage multi-way selection switch and a multi-stage band-pass filter 1, wherein the multi-stage band-pass filter 1 comprises a dielectric band-pass filter, a cavity band-pass filter and an MEMS band-pass filter.

Further, the frequency conversion unit comprises a frequency multiplier 5, a first frequency multiplier amplifier 4, a first high-pass filter 3, a first mixer 2, a second high-pass filter 6, a low noise amplifier 7, a first single-pole double-throw switch 8, a second single-pole double-throw switch 9, a second radio-frequency amplifier 12, a second mixer 13 and a first radio-frequency amplifier 14 which are connected in sequence, wherein a first millimeter wave band-pass filter 10 and a second millimeter wave band-pass filter 11 are arranged between the first single-pole double-throw switch 8 and the second single-pole double-throw switch 9 in parallel; the frequency multiplier 5, the first frequency multiplier amplifier 4 and the first high-pass filter 3 are arranged on a local oscillation port link of the first frequency mixer 2, and the first radio-frequency amplifier 14 is arranged on a local oscillation link of the second frequency mixer 13.

Further, the intermediate frequency filtering and amplifying unit includes a low pass filter 15, a first intermediate frequency amplifier 16, a digitally controlled attenuator 17, an equalizer 18, a second intermediate frequency amplifier 19, a temperature compensating attenuator 20, a third intermediate frequency amplifier 21 and a third band pass filter 22, which are connected in sequence.

Furthermore, the first high-pass filter 3 is a ceramic filter, is connected to the local oscillator port of the first mixer 2 in the frequency conversion unit, and is configured to filter the fundamental wave signal of the first local oscillator signal, reduce the spurious signals generated in the first mixer 2, and improve the spurious index of the entire component, that is, only the required main signal is present in the output signal, and there is no other redundant signal.

Further, the second high-pass filter 6 is configured to filter out the radio frequency and local oscillator signals carried by the first mixer 2, so as to obtain a relatively pure signal, and the relatively pure signal enters the low noise amplifier 7 in the subsequent link.

Furthermore, the frequency conversion unit divides the input radio frequency signal into two sections, and the two sections are respectively mixed with the local oscillation signal with double frequency in the first mixer 2 to obtain two paths of millimeter wave intermediate frequency signals, so that the second harmonic of the input signal is prevented from falling into the band, and the signal stray is reduced; and the filtering part consisting of the first single-pole double-throw switch 8, the second single-pole double-throw switch 9, the first millimeter wave band-pass filter 10 and the second millimeter wave band-pass filter 11 filters the two high and medium frequency signals respectively to obtain medium frequency signals.

Further, the second mixer 13 is configured to mix the two millimeter wave high-intermediate frequency signals with the second local oscillator signal 22.2/28.2GHz to obtain a low-intermediate frequency signal with a desired frequency.

Further, a numerical control attenuator 17 and an equalizer 18 are arranged between the first intermediate frequency amplifier 16 and the second intermediate frequency amplifier 19, and are used for adjusting the amplitude of the signal and ensuring the amplitude flatness of the output intermediate frequency signal.

Further, the temperature compensating attenuator 20 is used to adjust the temperature characteristics of the entire assembly.

As a specific example, the millimeter wave down conversion assembly is a 0.3-18GHz millimeter wave down conversion assembly, and further comprises a shielding box body, and the multipath filtering unit, the frequency conversion unit and the intermediate frequency filtering and amplifying unit are partially placed on the front surface of the box body; the corresponding control part and the power supply part are arranged on the back of the box body.