CN210640854U

CN210640854U - Large broadband down-conversion component

Info

Publication number: CN210640854U
Application number: CN201921908071.6U
Authority: CN
Inventors: 夏一生; 沈喜生
Original assignee: Jiangsu Shengjia Microelectronics Technology Co Ltd
Current assignee: Jiangsu Shengjia Microelectronics Technology Co Ltd
Priority date: 2019-11-06
Filing date: 2019-11-06
Publication date: 2020-05-29
Anticipated expiration: 2029-11-06

Abstract

The utility model discloses a big broadband down conversion subassembly, including low noise amplifier A, single-pole double throw switch A, two way down conversion passageways, band pass filter A, single-pole double throw switch B, low noise amplifier B and band pass filter B, including the switch filter and the mixer of two sets of connections in the down conversion passageway, switch filter comprises two single-pole three throw switches and the three MEMS filter of parallelly connected between two single-pole three throw switches. The utility model relates to a big broadband down conversion subassembly whole volume is less, and down conversion subassembly's broadband is great, and applicable scope is wider.

Description

Large broadband down-conversion component

Technical Field

The utility model relates to a frequency conversion technology field, concretely relates to big broadband down conversion subassembly.

Background

At present, down-conversion components are widely applied to receiving equipment of radars, microwave systems, communication systems and the like, and receive external high-frequency signals, down-convert the high-frequency signals to appropriate frequencies, and send the signals to an intermediate frequency receiver for processing. The general down-conversion component is generally narrow in bandwidth, an independent amplitude limiter, a plurality of numerical control attenuators and an amplifier are adopted, the integration level is low, and the assembly of the components can enable the size of the component to be large; meanwhile, the number of devices is various, and the reliability of the system is low.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a big broadband down conversion subassembly for down conversion subassembly's broadband is great, and whole small, the integrated level is high.

The utility model discloses a realize above-mentioned technical purpose through following technical scheme.

A large broadband down-conversion component comprises a low noise amplifier A, a single-pole double-throw switch A, a down-conversion channel, a band-pass filter A, a single-pole double-throw switch B, a low noise amplifier B and a band-pass filter B which are connected in sequence; the down-conversion channel comprises a first down-conversion channel and a second down-conversion channel, the first down-conversion channel comprises a switch filter A, a mixer A, a switch filter B and a mixer B which are connected in sequence, and the second down-conversion channel comprises a switch filter C, a mixer C, a switch filter D and a mixer D which are connected in sequence.

Further, the mixer a and the mixer C are both connected to the local oscillator a.

Further, the mixer B and the mixer D are both connected to the local oscillator B.

Further, the low noise amplifier a is connected to a signal input terminal.

Further, the band-pass filter B is connected to the signal output terminal.

Further, the switch filter comprises a single-pole-three-throw switch and a MEMS filter, and the MEMS filter is connected between the two single-pole-three-throw switches in parallel.

The utility model has the advantages that: the utility model adopts segmented frequency conversion, so that the frequency after one-time frequency mixing is not too high; the broadband of the down-conversion component is large, and the application range is wide; the switch filter adopts an MEMS filter to reduce the volume of the component; and each component is directly constructed by using a chip, so that the integration level is high.

Drawings

Fig. 1 is a block diagram of a down-conversion module of a large broadband according to the present invention;

fig. 2 is a block diagram of the switch filter of the present invention.

Wherein: 1-low noise amplifier A, 2-single pole double throw switch A, 3-switch filter A, 4-mixer A, 5-local oscillator A, 6-switch filter B, 7-mixer B, 8-local oscillator B, 9-switch filter C, 10-mixer C, 11-switch filter D, 12-mixer D, 13-band pass filter A, 14-single pole double throw switch B, 15-low noise amplifier B, 16-band pass filter B.

Detailed Description

In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

As shown in fig. 1, a large broadband down-conversion component includes a low noise amplifier a, a single-pole double-throw switch a, a down-conversion channel, a band-pass filter a, a single-pole double-throw switch B, a low noise amplifier B, and a band-pass filter B, which are connected in sequence. The down-conversion channel comprises a first down-conversion channel and a second down-conversion channel, the first down-conversion channel comprises a switch filter A, a mixer A, a switch filter B and a mixer B which are connected in sequence, and the second down-conversion channel comprises a switch filter C, a mixer C, a switch filter D and a mixer D which are connected in sequence; the frequency mixer A and the frequency mixer C are both connected with the local oscillator A, and the frequency mixer B and the frequency mixer D are both connected with the local oscillator B. In fig. 1, a low noise amplifier a is connected to a signal input terminal, and a band pass filter B is connected to a signal output terminal.

As shown in fig. 2, the structure of the switch filter in the down-conversion module of the present invention includes a single-pole-three-throw switch and a MEMS filter, the MEMS filter has excellent frequency selectivity and low insertion loss, and is much smaller than the conventional microwave filter in volume, so as to reduce the volume of the whole module. In fig. 2, the MEMS filter is connected in parallel between the first single-pole-three-throw switch and the second single-pole-three-throw switch, and the output terminal of the first single-pole-three-throw switch and the input terminal of the second single-pole-three-throw switch are respectively connected to the MEMS filter.

The radio frequency signals are input from a signal input end, enter a low noise amplifier A for amplification, then enter a single-pole double-throw switch A for classification, and are divided into low-frequency-band radio frequency signals and high-frequency-band radio frequency signals. The single-pole double-throw switch A is classified according to whether a radio frequency signal is larger than a threshold value f or not, the low-frequency band radio frequency signal smaller than the threshold value f enters a frequency mixer A after being filtered by a switch filter A, the frequency mixer A receives a signal of a local oscillator A through a local oscillator input end and mixes the filtered signal with the local oscillator signal, the mixed signal is filtered by a switch filter B and then enters a frequency mixer B, the frequency mixer B receives a signal of the local oscillator B through the local oscillator input end and mixes the filtered signal with the local oscillator signal to form a first intermediate frequency. The high-frequency band radio frequency signal larger than the threshold value f enters a mixer C after being filtered by a switch filter C, the mixer C receives a signal of a local oscillator A through a local oscillator input end, the filtered signal and the local oscillator signal are mixed, the mixed signal is filtered by a switch filter D and then enters a mixer D, the mixer D receives a signal of a local oscillator B through the local oscillator input end, and a second intermediate frequency is formed after the filtered signal and the local oscillator signal are mixed. The two intermediate frequency signals enter a band-pass filter A, the band-pass filter A filters interference from the intermediate frequency signals, then the intermediate frequency signals pass through a single-pole double-throw switch B, then the intermediate frequency signals are amplified by a low-noise amplifier B, and finally the intermediate frequency signals are obtained through the band-pass filter B and are output by a signal output end.

Specifically, CHM1294-99F is adopted by the mixer A, the mixer B, the mixer C and the mixer D, so that conversion loss and local oscillation noise are reduced. The low-noise amplifier A and the low-noise amplifier B both adopt SWLNA0012031, and the power consumption is low.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims

1. A large broadband down-conversion component, characterized by: the device comprises a low noise amplifier A, a single-pole double-throw switch A, a down-conversion channel, a band-pass filter A, a single-pole double-throw switch B, a low noise amplifier B and a band-pass filter B which are connected in sequence; the down-conversion channel comprises a first down-conversion channel and a second down-conversion channel, the first down-conversion channel comprises a switch filter A, a mixer A, a switch filter B and a mixer B which are connected in sequence, and the second down-conversion channel comprises a switch filter C, a mixer C, a switch filter D and a mixer D which are connected in sequence.

2. The large broadband down conversion module of claim 1, wherein: and the frequency mixer A and the frequency mixer C are both connected with a local oscillator A.

3. The large broadband down conversion module of claim 1, wherein: and the frequency mixer B and the frequency mixer D are both connected with a local oscillator B.

4. The large broadband down conversion module of claim 1, wherein: the low noise amplifier A is connected with a signal input end.

5. The large broadband down conversion module of claim 1, wherein: and the band-pass filter B is connected with the signal output end.

6. The large broadband down conversion module of claim 1, wherein: the switch filter comprises a single-pole three-throw switch and an MEMS filter, and the MEMS filter is connected between the two single-pole three-throw switches in parallel.