CN211266873U - Miniaturized high-suppression ultra-wideband receiving front end - Google Patents
Miniaturized high-suppression ultra-wideband receiving front end Download PDFInfo
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- CN211266873U CN211266873U CN201921629155.6U CN201921629155U CN211266873U CN 211266873 U CN211266873 U CN 211266873U CN 201921629155 U CN201921629155 U CN 201921629155U CN 211266873 U CN211266873 U CN 211266873U
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Abstract
The utility model provides a miniaturized high ultra wide band who suppresses receives front end, includes receiving casing, upper strata base plate, lower floor's base plate, forms the encapsulation casing through direct welding mode, receives outside radio frequency signal and carries out filtering amplification and frequency conversion mixing processing and finally obtains intermediate frequency signal, according to the wave filter segmentation demand, designs high linearity circuit, through with an intermediate frequency design to the received signal outband to the combined frequency interference that appears at the mixing process of analysis, has solved the problem that the combined frequency component is many, the combined frequency order is high.
Description
Technical Field
The utility model relates to a miniaturized ultra wide band of high suppression receives front end belongs to broadband technical field.
Background
With the rapid technology of the ultra-wideband technology, the ultra-wideband receiving front end has the advantages of high transmission rate, large system capacity and low power consumption, so that the broadband and ultra-wideband receiving front end has the advantages of high frequency spectrum utilization rate, portability and capability of improving the living space of a radar and the working effectiveness.
The radio frequency front end is used as the most front end part of the receiver, and plays an important role in the structure and the performance of a receiver system. The frequency of the radio frequency carrier with higher frequency is converted to the intermediate frequency with lower frequency, so that the subsequent processing is the main function of the radio frequency receiving front end. The rf receiver front-end generally comprises a limiter, a preselection filter, a low noise amplifier, a mixer, a local oscillator, an if amplifier, an if filter, etc.
At present, more and more microwave receivers adopt ultra wide band array design schemes, and the receivers initially realize full coverage of microwave frequency bands. In a conventional receive front end, a system front end structure divides a received signal into a plurality of channels through a series of switches and filters, and then mixes, filters and amplifies each channel of signal. By designing the receiving front end in this way, attenuation is introduced into the front end circuit to deteriorate the noise figure of the receiving channel, and the link is too complex and the size is increased. The conventional multi-chip module technology has not been able to meet the current demand, but has disadvantages of large volume, low packaging density, poor performance and complicated link.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be: aiming at the problems of low assembly density and link redundancy, and the defects of large volume and poor performance of the traditional multi-chip module technology in the prior art, the miniaturized high-suppression ultra-wideband receiving front end is provided, and the difficulties of large volume, more combined clutter and integrated design are overcome.
The utility model provides an above-mentioned technical problem realize through following technical scheme:
the utility model provides a miniaturized high ultra wide band who suppresses receives front end, is including receiving casing, upper substrate, lower floor's base plate, the lower floor's base plate is hugged closely and is received the casing bottom and install, surface mounting on the lower floor's base plate is hugged closely to the upper substrate, wherein, receiving casing passes through BGA table and pastes and receive outside radio frequency signal to send radio frequency signal to lower floor's base plate and carry out the filtering and enlarge the processing, will handle the back signal transmission again and carry out mixing and secondary frequency conversion to upper substrate, acquire two intermediate frequency signals.
The lower substrate comprises a radio-frequency signal input end, an amplitude limiting amplification unit, an equalization unit, a switch filter bank and a radio-frequency signal output end, the radio-frequency signal input end is connected with the input end of the amplitude limiting amplification unit, the output end of the amplitude limiting amplification unit is connected with the input end of the equalization unit, the output end of the equalization unit is connected with the input end of the switch filter bank, and the output end of the switch filter bank is connected with the radio-frequency signal output end and outputs a radio-frequency signal through the radio.
The upper substrate comprises a local oscillator signal processing link, an intermediate frequency signal processing link, a second local oscillator signal processing link and a second intermediate frequency signal processing link, wherein the local oscillator signal processing link comprises a local oscillator signal input end, a signal frequency multiplier, a first signal amplifier and a first frequency mixer, the local oscillator signal input end is connected with the signal frequency multiplier input end, the signal frequency multiplier output end is connected with the first signal amplifier input end, the first signal amplifier output end and the radio frequency signal output end are connected with the first frequency mixer input end at the same time, and the first frequency mixer output end is connected with the intermediate frequency signal processing link input end.
The second local oscillator signal processing link comprises a second local oscillator signal input end, a third signal amplifier and a second attenuator, the second local oscillator signal input end is connected with the third signal amplifier input end, the third signal amplifier output end is connected with the second attenuator input end, and the second attenuator output end is connected with an intermediate frequency signal processing link input end.
An intermediate frequency signal processing link comprises a second signal amplifier, a signal filter, an attenuator and a second mixer, wherein the input end of the intermediate frequency signal processing link comprises the input end of the second signal amplifier and the input end of the second mixer, the output end of the second signal amplifier is connected with the input end of the signal filter, the output end of the signal filter is connected with the input end of the attenuator, the output end of the attenuator is connected with the input end of the second mixer, and the output end of the second mixer is connected with the input end of the second intermediate frequency signal processing link.
The second intermediate frequency signal processing link comprises a third attenuator, a fourth signal amplifier and an intermediate frequency signal output end, the input end of the second intermediate frequency signal processing link is the input end of the third attenuator, the output end of the third attenuator is connected with the input end of the fourth signal amplifier, and the output end of the fourth signal amplifier is connected with the intermediate frequency signal output end.
The receiving shell is an integrated kovar shell, and the upper-layer substrate and the lower-layer substrate are connected through direct welding.
The upper substrate and the lower substrate both adopt HTCC substrates, chip circuits for XX are arranged on the substrates, and meanwhile, a plastic package material for improving the circuit performance is arranged.
The radio frequency signal received by the radio frequency signal input end is an ultra wide band 2-18 GHz signal, and the output signal is a 2GHz two-intermediate frequency signal.
The switch filter bank comprises 5 sections of segmented filters which are respectively 2 GHz-3.5 GHz, 3 GHz-5 GHz, 4.5 GHz-7.5 GHz, 7 GHz-11.5 GHz and 11 GHz-18 GHz.
The frequency range of the first mixer is DC-18 GHz, and signals of 2-18 GHz pass through the first mixer; the frequency range of the second mixer is 18-32 GHz, and a 24GHz signal is passed through.
Compared with the prior art, the utility model the advantage lie in:
(1) the utility model provides a pair of miniaturized ultra wide band of high suppression receives front end encapsulates through using the receiving shell, adopts direct welded mode to interconnect between the same base plate simultaneously, has avoided temperature gradient's influence to the mode of multi-element integration has simplified system design, has reduced the volume of receiving the front end simultaneously, through directly mixing broadband signal secondary receiving the front end. The attenuation is reduced, the deterioration of a noise coefficient is improved, and the adaptive anti-interference capability of the receiver is enhanced;
(2) the utility model discloses a switch filter bank, according to the wave filter segmentation demand, design high linearity circuit, out of band through designing a mid frequency received signal, and the combined frequency interference that the analysis appears at the mixing in-process, it is many to have solved the combined frequency weight, the problem that the combined frequency order is high, thereby realize the function of high suppression, can regard as standardization, the universalization module, be applicable to the demand that all non-full frequency channels received, this kind of ultra wide band received the front end and has miniaturization, the integration, high suppression, low-cost is showing the advantage.
Drawings
Fig. 1 is a schematic view of a planar structure of a double substrate provided by the utility model;
fig. 2 is a side view of a receiving housing package provided by the utility model;
fig. 3 is a three-dimensional structure diagram of the packaging case provided by the utility model;
Detailed Description
The utility model provides a miniaturized high ultra wide band who suppresses receives front end for carry out the receipt and the processing of radio frequency signal in the electronic countermeasure field, as shown in FIG. 1A, FIG. 1B, mainly including receiving the casing, upper substrate, lower floor's base plate, wherein, receive the casing and pass through BGA table subsides and receive outside radio frequency signal, send this signal to the lower floor's base plate that carries out filtering amplification processing to the signal, will handle the back signal transmission through lower floor's base plate and be used for carrying out signal mixing and secondary frequency conversion on the upper substrate, finally acquire two intermediate frequency signals and outwards export, wherein:
the lower substrate comprises a radio-frequency signal input end 1, an amplitude limiting amplification unit 12, an equalization unit 13, a switch filter bank 14 and a radio-frequency signal output end 2, wherein the radio-frequency signal input end 1 is connected with the input end of the amplitude limiting amplification unit 12, the output end of the amplitude limiting amplification unit 12 is connected with the input end of the equalization unit 13, the output end of the equalization unit 13 is connected with the input end of the switch filter bank 14, and the output end of the switch filter bank 14 is connected with the radio-frequency signal output end 2 and outputs a radio-frequency signal through the;
the lower-layer substrate is directly welded on the inner bottom surface of the receiving shell, an external radio-frequency signal sent by the receiving shell is received through the radio-frequency signal input end 1, signal amplitude limiting and signal amplification processing are carried out in the amplitude limiting amplification unit 12, then the processed signal is subjected to signal amplitude equalization through the equalization unit 13, and finally the signal is filtered through the switch filter bank 14 and then output to the upper-layer substrate through the radio-frequency signal output end 2;
the upper substrate is closely attached to the lower substrate through welding and is installed, the lower substrate comprises a plurality of processing links, specifically, a local oscillator signal processing link, an intermediate frequency signal processing link, a two local oscillator signal processing link and a two intermediate frequency signal processing link, the two local oscillator signal processing links respectively obtain a local oscillator signal and a two local oscillator signal, and the two local oscillator signal processing links respectively obtain final two intermediate frequency signals through the one intermediate frequency signal processing link and the two intermediate frequency signal processing links to be output outwards, wherein:
a local oscillator signal processing link comprises a local oscillator signal input end 3, a signal frequency multiplier 15, a first signal amplifier 16 and a first frequency mixer 17, the local oscillator signal input end 3 is connected with the input end of the signal frequency multiplier 15, the output end of the signal frequency multiplier 15 is connected with the input end of the first signal amplifier 16, the output end of the first signal amplifier 16 and the output end of the radio frequency signal 2 are connected with the input end of the first frequency mixer 17 at the same time, and the output end of the first frequency mixer 17 is connected with the input end of an intermediate frequency signal processing link;
a local oscillator signal is subjected to frequency multiplication in a signal frequency multiplier 15 through a local oscillator signal input end 3, the frequency-multiplied signal is subjected to signal amplification through a first signal amplifier 16 and is input to a first frequency mixer 17, and the first frequency mixer 17 simultaneously receives a radio frequency signal sent by a lower-layer substrate and the amplified signal to generate an intermediate frequency signal;
the second local oscillator signal processing link comprises a second local oscillator signal input end 4, a third signal amplifier 25 and a second attenuator 24, the second local oscillator signal input end 4 is connected with the input end of the third signal amplifier 25, the output end of the third signal amplifier 25 is connected with the input end of the second attenuator 24, and the output end of the second attenuator 24 is connected with the input end of an intermediate frequency signal processing link;
the second local oscillation signal is input through a second local oscillation signal input end 4, passes through a third signal amplifier 25 and a second attenuator 24 in sequence for signal amplification and attenuation processing, and then enters a second frequency mixer 23;
an intermediate frequency signal processing link comprises a second signal amplifier 18, a signal filter 19, an attenuator 20 and a second mixer 23, wherein the input end of the intermediate frequency signal processing link comprises the input end of the second signal amplifier 18 and the input end of the second mixer 23, the output end of the second signal amplifier 18 is connected with the input end of the signal filter 19, the output end of the signal filter 19 is connected with the input end of the attenuator 20, the output end of the attenuator 20 is connected with the input end of the second mixer 23, and the output end of the second mixer 23 is connected with the input end of the intermediate frequency signal processing link.
An intermediate frequency signal is subjected to signal amplification through the second signal amplifier 18, is subjected to signal filtering and attenuation processing sequentially through the signal filter 19 and the attenuator 20, and is sent to the second mixer 23 after the attenuation processing, and the second mixer 23 receives a second local oscillation signal and an intermediate frequency signal sent by the second attenuator 24 to generate a second intermediate frequency signal;
the second intermediate frequency signal processing link comprises a third attenuator 22, a fourth signal amplifier 21 and an intermediate frequency signal output end 5, the input end of the second intermediate frequency signal processing link is the input end of the third attenuator 22, the output end of the third attenuator 22 is connected with the input end of the fourth signal amplifier 21, and the output end of the fourth signal amplifier 21 is connected with the intermediate frequency signal output end 5;
the second intermediate frequency signal passes through the third attenuator 22 and the fourth signal amplifier 21 in sequence to perform signal attenuation and signal amplification, and then the processed second intermediate frequency signal is obtained and is output to the outside through the intermediate frequency signal output end 5.
The receiving shell is an integrated kovar shell, the upper substrate and the lower substrate are directly welded together, and the upper substrate and the lower substrate are HTCC substrates, namely high-temperature co-fired ceramic substrates, so that the receiving shell has the advantages of high mechanical strength and good heat dissipation. The BGA surface mount package is adopted outside, and the signal source and the radio frequency link are connected together in a BGA mode, so that the occupied area of the receiving front end is effectively reduced, and the transmission reliability is improved.
The switch filter bank 14 is used in the lower substrate, segmented filtering with 5-segment frequencies including 2 GHz-3.5 GHz, 3 GHz-5 GHz, 4.5 GHz-7.5 GHz, 7 GHz-11.5 GHz and 11 GHz-18 GHz is designed according to the requirement of 2-18 GHz ultra-wideband radio frequency signals, and the ultra-wideband radio frequency signals effectively reduce stray through the switch filter bank 14.
The frequency range of the first mixer 17 is DC-18 GHz, and signals of 2-18 GHz pass through; the frequency range of the second mixer 23 is 18 to 32GHz, and a 24GHz signal is passed. The internal supply potential is: an intermediate frequency amplification power supply 6 supplies power to the second signal amplifier 18; the second intermediate frequency amplification power supply 7 supplies power to the fourth signal amplifier 21, the first local oscillator amplification power supply 8 supplies power to the first signal amplifier 16, the second local oscillator amplification power supply 9 supplies power to the third signal amplifier 25, the switch filtering power supply switch 10 supplies power to the filter bank 14, and the low noise amplification power supply 11 supplies power to the low noise amplifier in the amplitude limiting amplification unit 12.
The following is further illustrated with reference to specific examples:
a miniaturized ultra-wideband receiving front end with high suppression adopts a direct welding method, as shown in figure 2, a lower substrate is arranged at the inner bottom end of a receiving shell, an upper substrate is arranged close to the lower substrate, an external radio frequency signal is received through the receiving shell, the external radio frequency signal is processed through four processing links of the lower substrate and the upper substrate respectively, and finally two intermediate frequency signals which are output outwards are obtained, wherein:
as shown in fig. 3C and 3D, the back of the receiving housing is provided with a BGA surface mount package for receiving and transmitting radio frequency signals, the lower substrate specifically includes a radio frequency signal input terminal 1, a limiting amplification unit 12, an equalization unit 13, a switch filter bank 14, and a radio frequency signal output terminal 2, and the radio frequency signals sequentially pass through the above components and are finally input to the upper substrate;
the processing link of the upper substrate mainly comprises a local oscillator signal processing link, an intermediate frequency signal processing link, a two-local oscillator signal processing link and a two-intermediate frequency signal processing link, wherein the one-local oscillator signal processing link receives a local oscillator signal, the local oscillator signal is mixed with a radio frequency signal input by the lower substrate to obtain an intermediate frequency signal, the two-local oscillator signal is obtained through the two-local oscillator signal processing link, the two-local oscillator signal is mixed with the intermediate frequency signal to obtain a two-intermediate frequency signal, and the two-intermediate frequency signal is processed by the two-intermediate frequency signal processing link and then is output to the.
Wherein, the receiving shell adopts an integrated Kovar shell with the size of 15mm multiplied by 5mm, the upper layer substrate and the lower layer substrate are directly welded together, an HTCC substrate is adopted, and the size is 13.4
mm is multiplied by 13.4mm, the dielectric constant is 9.7, the 5-segment frequency segmented filtering of the switch filter bank 14 is respectively 2 GHz-3.5 GHz, 3 GHz-5 GHz, 4.5 GHz-7.5 GHz, 7 GHz-11.5 GHz and 11 GHz-18 GHz, the frequency range of the first mixer 17 is DC-18 GHz, and 2-18 GHz signals pass through; the frequency range of the second mixer 23 is 18 to 32GHz, and a 24GHz signal is passed.
The details of the present invention not described in detail in the specification are well known to those skilled in the art.
Claims (11)
1. A miniaturized ultra-wideband reception front-end with high rejection, characterized in that: including receiving casing, upper substrate, lower floor's base plate, the lower floor's base plate is hugged closely and is received the casing bottom and install, surface mounting is gone up to the lower floor's base plate is hugged closely to the upper substrate, wherein, the receiving casing passes through BGA table subsides and receives outside radio frequency signal to send radio frequency signal to the base plate of lower floor and carry out the filtering and enlarge the processing, send the signal after will handling to upper substrate again and carry out mixing and secondary frequency conversion, acquire two intermediate frequency signals.
2. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 1, characterized in that: the lower substrate comprises a radio frequency signal input end (1), an amplitude limiting amplification unit (12), an equalization unit (13), a switch filter bank (14) and a radio frequency signal output end (2), the radio frequency signal input end (1) is connected with the input end of the amplitude limiting amplification unit (12), the output end of the amplitude limiting amplification unit (12) is connected with the input end of the equalization unit (13), the output end of the equalization unit (13) is connected with the input end of the switch filter bank (14), and the output end of the switch filter bank (14) is connected with the radio frequency signal output end (2) and outputs a radio frequency signal through the radio frequency signal output end (2).
3. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 1, characterized in that: the upper substrate comprises a local oscillator signal processing link, an intermediate frequency signal processing link, a second local oscillator signal processing link and a second intermediate frequency signal processing link, wherein the local oscillator signal processing link comprises a local oscillator signal input end (3), a signal frequency multiplier (15), a first signal amplifier (16) and a first mixer (17), the local oscillator signal input end (3) is connected with the input end of the signal frequency multiplier (15), the output end of the signal frequency multiplier (15) is connected with the input end of the first signal amplifier (16), the output end of the first signal amplifier (16) and the radio frequency signal output end (2) are connected with the input end of the first mixer (17), and the output end of the first mixer (17) is connected with the input end of the intermediate frequency signal processing link.
4. A miniaturized, highly-inhibited ultra-wideband reception front-end according to claim 3, characterized in that: the second local oscillator signal processing link comprises a second local oscillator signal input end (4), a third signal amplifier (25) and a second attenuator (24), the second local oscillator signal input end (4) is connected with the input end of the third signal amplifier (25), the output end of the third signal amplifier (25) is connected with the input end of the second attenuator (24), and the output end of the second attenuator (24) is connected with the input end of the intermediate frequency signal processing link.
5. A miniaturized, highly-inhibited ultra-wideband reception front-end according to claim 3, characterized in that: the intermediate frequency signal processing link comprises a second signal amplifier (18), a signal filter (19), an attenuator (20) and a second mixer (23), the input end of the intermediate frequency signal processing link comprises the input end of the second signal amplifier (18) and the input end of the second mixer (23), the output end of the second signal amplifier (18) is connected with the input end of the signal filter (19), the output end of the signal filter (19) is connected with the input end of the attenuator (20), the output end of the attenuator (20) is connected with the input end of the second mixer (23), and the output end of the second mixer (23) is connected with the input end of the second intermediate frequency signal processing link.
6. A miniaturized, highly-inhibited ultra-wideband reception front-end according to claim 3, characterized in that: the two intermediate frequency signal processing links comprise a third attenuator (22), a fourth signal amplifier (21) and an intermediate frequency signal output end (5), the input end of the two intermediate frequency signal processing links is the input end of the third attenuator (22), the output end of the third attenuator (22) is connected with the input end of the fourth signal amplifier (21), and the output end of the fourth signal amplifier (21) is connected with the intermediate frequency signal output end (5).
7. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 1, characterized in that: the receiving shell is an integrated kovar shell, and the upper-layer substrate and the lower-layer substrate are connected through direct welding.
8. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 1, characterized in that: the upper substrate and the lower substrate both adopt HTCC substrates, chip circuits for XX are arranged on the substrates, and meanwhile, a plastic package material for improving the circuit performance is arranged.
9. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 2, characterized in that: the radio frequency signal received by the radio frequency signal input end (1) is an ultra wide band 2-18 GHz signal, and the output signal is a 2GHz two-intermediate frequency signal.
10. A miniaturized, highly-inhibited, ultra-wideband reception front-end according to claim 2, characterized in that: the switch filter bank (14) comprises 5 sections of segmented filters which are respectively 2 GHz-3.5 GHz, 3 GHz-5 GHz, 4.5 GHz-7.5 GHz, 7 GHz-11.5 GHz and 11 GHz-18 GHz.
11. A miniaturized, highly-inhibited ultra-wideband reception front-end according to claim 3, characterized in that: the frequency range of the first mixer (17) is DC-18 GHz, and signals of 2-18 GHz pass through; the frequency range of the second mixer (23) is 18-32 GHz, and a 24GHz signal is passed through.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921629155.6U CN211266873U (en) | 2019-09-27 | 2019-09-27 | Miniaturized high-suppression ultra-wideband receiving front end |
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| CN201921629155.6U CN211266873U (en) | 2019-09-27 | 2019-09-27 | Miniaturized high-suppression ultra-wideband receiving front end |
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| CN211266873U true CN211266873U (en) | 2020-08-14 |
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| CN201921629155.6U Active CN211266873U (en) | 2019-09-27 | 2019-09-27 | Miniaturized high-suppression ultra-wideband receiving front end |
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