CN203617971U - Shortwave broadband down converter - Google Patents
Shortwave broadband down converter Download PDFInfo
- Publication number
- CN203617971U CN203617971U CN201320869518.XU CN201320869518U CN203617971U CN 203617971 U CN203617971 U CN 203617971U CN 201320869518 U CN201320869518 U CN 201320869518U CN 203617971 U CN203617971 U CN 203617971U
- Authority
- CN
- China
- Prior art keywords
- signal
- transformer
- inductance
- capacitor
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a shortwave broadband down converter and relates to a shortwave down converter device in the communication field. The shortwave broadband down converter is composed of a preselector, a converter, a final amplifier, a control unit, a power supply unit and other parts. The preselector, which is composed of an amplitude limiter, switches and a suboctave filter, can effectively perform preselection and protection functions on an input signal, the device adopts a high-linearity mixer, a low-noise amplifier and an intermediate-frequency filter to realize a signal frequency conversion filtering function, the input signal is down converted into an intermediate-frequency signal, and an amplification function on the intermediate-frequency signal is realized through a high-grain high-linearity final amplifier finally. The shortwave broadband down converter has the advantages of low noise, high linearity and low stray; the shortwave broadband down converter has the following main technical indexes: the noise factor is less than or equal to 16dB, the IIP2 is more than or equal to 70dBm, the IIP3 is more than or equal to 25dBm, the double-tone dynamic range is more than or equal to 85dB, the gain is more than or equal to 30dB, and the instantaneous bandwidth is more than or equal to 2MHz; and the shortwave broadband down converter is especially suitable for shortwave communication equipment as the shortwave down converter device.
Description
Technical field
The utility model relates to a kind of short wave bandwidth low-converter in the communications field, is specially adapted to do shortwave down converter means.
Technical background
Short wave communication refer to utilize wavelength for 10m～100m(frequency be 3M～30MHz) the radio communication carried out of electromagnetic wave.Present much short wave communication equipment is by shortwave band spreading to medium wave high band, and therefore short frequency scope also just expands to 1.5MHz～30MHz.Short wave communication is one of basic mode of radio communication, it be rely on ionospheric reflection, refraction carrys out transmission information, this century the '30s just start generally to use.Because ionosphere is a kind of natural transmission medium, make that short wave communication has that equipment is simple, communication distance is far away, mobility is good, almost can be by various modulator approaches, the easy advantage such as networking.But since the sixties in 20th century, due to the develop rapidly of the communication technology such as satellite, optical fiber, what some shortcomings of short wave communication and adaptability problem were outstanding shows, and has occurred that short wave communication is subject to unfrequented situation.
The research of shortwave electric wave transmission in recent years, ionosphere characteristic and the characteristic of channel, a series of achievements that the technology such as adaptive frequency-selecting, adaptive equalization and adaptation rate control obtain, make short wave communication overcome multipath fading, improve communication quality, improving frequency efficiency and can on communication rate, obtain breakthrough progress, short wave communication has entered the new stage of high-quality transmission information.The intrinsic survivability of short wave communication is strong, networking flexibility, the feature such as cheap, has more consolidated the status of short wave communication in defence communications system (DCS).Short wave communication has worldwide had application more effectively more widely, has especially occupied irreplaceable position in military communication field.
But the finiteness of short wave communication bandwidth, the importance of short wave communication and a large amount of civilian shortwave broadcastings have formed a complicated short-wave electromagnetic environment jointly, its primary feature is exactly that signal is intensive, and communication signal strength difference is huge.Therefore in short wave communication interception system, the adaptive capacity to short wave channel is had higher requirement, but also require instant bandwidth more wide better, can search for quickly short-wave signal, need short wave channel to there is great dynamic range, low noise, low spuious, the features such as wide instant bandwidth.
Utility model content
Technical problem to be solved in the utility model is to avoid the weak point in above-mentioned background technology and a kind of low noise, great dynamic range, low spuious short wave bandwidth low-converter is provided.The features such as the utility model also has noise factor≤16dB, IIP2 >=70dBm, IIP3 >=25dBm, double-tone dynamic range >=85dB, gain >=30dB, instant bandwidth >=2MHz, and each channel part amplitude-phase consistency is high, antijamming capability is strong.
The purpose of this utility model is achieved in that
A kind of short wave bandwidth low-converter, comprise preselector 1, frequency converter 2, final amplifier 3, control unit 4 and power subsystem 5, it is characterized in that: preselector 1, under the control of control unit 4, carries out exporting frequency converter 2 to after filtering to the short-wave signal of outside input; After obtaining intermediate-freuqncy signal and carry out amplification filtering after the signal that frequency converter 2 is exported preselector 1 pair and local oscillation signal mixing from outside, export final amplifier 3 to; The signal that final amplifier 3 is exported frequency converter 2 carries out the amplification of low noise, high-gain and high linearity, final externally output.
Wherein, described preselector 1 comprises amplitude limiter 6, first order switch 7, bank of filters 8 and second level switch 9; After amplitude limiter 6 carries out limited amplitude protection to the short-wave signal of outside input and export the switch filter group being made up of first order switch 7, bank of filters 8 and second level switch 9 to, switch filter group carries out exporting frequency converter 2 to after filtering according to sub-octave to the signal of input; First order switch 7 and second level switch 9 are controlled by control unit 4 respectively, for switching over.
Wherein, described frequency converter 2 comprises frequency mixer 10, low noise amplifier 11 and intermediate-frequency filter 12; The signal that frequency mixer 10 is exported preselector 1 carries out mixing with the local oscillation signal of outside input and forms intermediate-freuqncy signal, and low noise amplifier 11 carries out, after low noise amplification, exporting intermediate-frequency filter 12 to the intermediate-freuqncy signal of input; The signal that intermediate-frequency filter 12 is exported low noise amplifier 11 carries out exporting final amplifier 3 to after filtering.
Wherein, described low noise amplifier 11 comprises that first to fourth transformer T1 to T4, the first to the 8th capacitor C 1 to C8, the first to the 6th inductance L 1 are to L6, and the first to the 6th resistance R 1 to R6 and first is to transistor seconds V1 to V2, the first described transformer T1 input is connected with frequency mixer 10 outputs, the first transformer T1 output Yi road is connected with the second transformer T2 input after being connected in series successively the first capacitor C 1, the 3rd transformer T3, the first transistor V1, the 7th capacitor C 7, after another road output of the first transformer T1 output is connected in series the second capacitor C 2, the 4th transformer T4, transistor seconds V2, the 8th capacitor C 8 successively, be connected with second another input of transformer T2, the second transformer T2 output is connected with intermediate-frequency filter 12 inputs, one end of the first resistance R 1 is connected with the Vcc that power subsystem 5 provides, one end of the other end of the first resistance R 1 and the first inductance L 1, one end of the 5th capacitor C 5 also connects, the first inductance L 1 other end serial connection the 3rd inductance L 3, the collector electrode of the first transistor V1, the 3rd transformer T3 one end, other end serial connection the 3rd resistance R 3 of the 3rd inductance L 3, the other end of the 3rd resistance R 3 also connects the 3rd capacitor C 3, the 5th resistance R 5, the base stage of the first transistor V1, second resistance R 2 one end are connected with the Vcc that power subsystem 5 provides, one end of the other end and the second inductance L 2, one end of the 6th capacitor C 6 also connects, the second inductance L 2 other end serial connection the 4th inductance L 4, the collector electrode of transistor seconds V2, the 4th transformer T4 one end, other end serial connection the 4th resistance R 4 of the 4th inductance L 4, the other end of the 4th resistance R 4 also connects the 4th capacitor C 4, the 6th resistance R 6, the base stage of transistor seconds V2, the emitter of the first transistor V1 connects the 7th inductance L 7 ground connection, the emitter of transistor seconds V2 connects the 8th inductance L 8 ground connection, input the first transformer T1 by the intermediate-freuqncy signal after frequency mixer 10 frequency conversions signal level is divided into two-way, two-way output signal is synthesized and output to intermediate-frequency filter 12, the third and fourth transformer T3 and T4 with the second transformer T2 respectively and forms respectively feedback circuit amplifying signal is fed back after first to transistor seconds V1 to V2 amplifies, the first and second transformer T1 and T2 settling signal combiner first to transistor seconds V1 to V2 and frequency mixer 10, intermediate-frequency filter 12 between impedance matching.
Wherein, described final amplifier 3 comprises the 5th to the 6th transformer T5 to T6, the 9th to the 14 capacitor C the 9 to C14, the 7th to the 12 resistance R 7 to R12, the 7th to the 9th inductance L 7 to L9 and the 3rd to the 4th transistor V3 to V4, the 5th described transformer T5 input is connected with frequency converter 2 outputs, the 5th transformer T5 output one tunnel serial connection the 9th capacitor C 9, the 3rd crystal amplifier V3, after the 11 capacitor C 11, be connected another road output serial connection the tenth capacitor C 10 with the 6th transformer T6 input, the 4th crystal amplifier V4, after the 14 capacitor C 14, be connected with the 6th another input of transformer T6, the 6th transformer T6 output is connected with signal output port, and the 7th resistance R 7 one end are connected with the 9th inductance L 9 center-side Vcc2 by after bleeder circuit, the grid of the other end and the 3rd crystal amplifier V3, the 7th inductance L 7 one end, the 9th capacitor C 9 one end also connect, the 7th inductance L 7 other end serial connection the 9th resistance R 9, after the 13 capacitor C 13 with the drain electrode of the 3rd crystal amplifier V3, the 11 capacitor C 11 one end, the 9th inductance L 9 one end also connect, and the 8th resistance R 8 one end are connected with the 9th inductance L 9 center-side Vcc2 by after bleeder circuit, the grid of the other end and the 4th crystal amplifier V4, the 8th inductance L 8 one end, the tenth capacitor C 10 one end also connect, the 8th inductance L 8 other end serial connection the tenth resistance R 10, after the 14 capacitor C 14 with the drain electrode of the 4th crystal amplifier V4, the 12 capacitor C 12 one end, the 9th inductance L 9 one end also connect, source electrode serial connection the 11 resistance R 11 ground connection of the 3rd crystal amplifier V3, and source electrode serial connection the 12 resistance R 12 ground connection of the 4th crystal amplifier V4, the 6th transformer T6 output port is connected with signal output port, by intermediate-freuqncy signal input the 5th transformer T5 after frequency converter 2 frequency conversions, signal is divided equally for two-way, two-way output signal is exported by the 6th transformer T6 is synthetic respectively after the 3rd to the 4th crystal amplifier V3 to V4 amplifies, and the 7th inductance L 7, the 9th resistance R the 9 and the 11 capacitor C 11 and the 8th inductance L 8, the tenth resistance R the 10 and the 12 capacitor C 12 form respectively feedback circuit amplifying signal is fed back, the the 11 and the 12 resistance R 11 and R12 form respectively feedback circuit amplifying signal are fed back, impedance matching between the 5th and the 6th transformer T5 and T6 settling signal combiner and the 3rd to the 4th crystal amplifier V3 to V4 and frequency converter 2, signal output port.
Wherein, the frequency mixer that frequency mixer 10 selects field effect transistor to form, and the local oscillation signal of employing+23dBm high level drives.
The utility model is compared background technology tool and is had the following advantages:
A) the utility model adopts preselector 1 circuit, selects suboctave filter group to cover whole shortwave frequency range, has effectively suppressed the interference of out of band signal, has improved the antijamming capability of equipment.
B) in the utility model, the bank of filters of preselector 1 adopts the segmentation method of overlapping 2MHz, has effectively guaranteed the 2MHz instant bandwidth of equipment, has improved the ability of equipment fast search signal.
C) the utility model adopts low noise amplifier 11, frequency mixer 10 and final amplifier 3 circuit to realize low noise, great dynamic range technical indicator.
D) the utility model intermediate-frequency filter 12 has the feature of high squareness factor and high Out-of-band rejection degree, has effectively suppressed spurious signal, has realized the low spuious requirement of equipment.
E) the utility model adopts integrated emulation and triage techniques, has guaranteed the phase amplitude consistency of multiple equipment rooms.In low noise amplifier 11 and final amplifier 3 designs, utilize simulation software to set up the small-signal model of device, take into full account the Allowance Design that circuit is realized, select suitable implementation, effectively reduce debugging difficulty, guarantee the consistency of amplifier.Meanwhile, the bank of filters 8 in equipment and intermediate-frequency filter 12 are adopted to triage techniques, improve the amplitude-phase consistency of many group filters, controlled preferably the consistency of each channel part.
Accompanying drawing explanation
Fig. 1 is electric functional-block diagram of the present utility model.
Fig. 2 is the electrical schematic diagram of the utility model preselector 1.
Fig. 3 is the electrical schematic diagram of frequency converter 2 of the present utility model.
Fig. 4 is the electrical schematic diagram of the utility model low noise amplifier 11.
Fig. 5 is the electrical schematic diagram of the utility model final amplifier 3.
Embodiment
Referring to figs. 1 through Fig. 5, the utility model comprises preselector 1, frequency converter 2, final amplifier 3, control unit 4, power subsystem 5.Fig. 1 is electric functional-block diagram of the present utility model, and embodiment presses Fig. 1 connection line.The utility model embodiment works in shortwave frequency range, and frequency range is 1.5MHz to 30MHz.
1 effect of the utility model preselector is that input signal is carried out to preliminary election filtering, and Fig. 2 is the electrical schematic diagram of the utility model preselector 1, and embodiment presses Fig. 2 connection line.Signal is through the protection of amplitude limiter 6; the switch filter group forming through switch 7, bank of filters 8 and switch 9 by input signal according to sub-multiplier frequency filter; suppress interference signal and the noise signal outside band; improve the antijamming capability of equipment; overlapping 2MHz between adjacent filter, has guaranteed the instant bandwidth of 2MHz.Embodiment amplitude limiter 6 adopts commercially available 2CK75D type element manufacturing, and in bank of filters 8, electric capacity adopts commercially available CC41-0603-CG-50V type capacitor fabrication.
2 effects of the utility model frequency converter are that input short-wave signal is converted to intermediate-freuqncy signal amplification filtering, and Fig. 3 is the electrical schematic diagram of the utility model frequency converter 2, and embodiment presses Fig. 3 connection line.Input signal and local oscillation signal are converted to intermediate-freuqncy signal through frequency mixer 10, then pass through the amplification filtering of low noise amplifier 11 and intermediate-frequency filter 12.In order to guarantee high linearity, the frequency mixer that frequency mixer 10 selects field effect transistor to form, effectively improve the IP3 index of frequency mixer, and the local oscillation signal of employing+23dBm high level drives, low noise amplifier 10 has been selected the form of low noise transistor and harmless feedback, has realized the index of low noise and high IP3, in order to guarantee the low spuious of this device, intermediate-frequency filter 11 has higher squareness factor, has effectively suppressed band stray.Embodiment frequency mixer 10 adopts commercially available RAY-3 type element manufacturing.
11 effects of the utility model low noise amplifier are that intermediate-freuqncy signal is amplified, and Fig. 4 is the electrical schematic diagram of the utility model low noise amplifier 11, and embodiment presses Fig. 4 connection line.Low noise amplifier 11 adopts balance to amplify form, by the first transistor V1 and transistor seconds V2 Compositional balance structure for amplifying, improve the second order dynamic indicator of amplifier, for single transistor, adopt the form of harmless feedback, can improve three rank dynamic indicator and noise-reduction coefficients of amplifier.In low noise amplifier 11, transistor adopts commercially available 2N5109 type element manufacturing.
3 effects of the utility model final amplifier are after intermediate-freuqncy signal is amplified, to export to AD sampling, and Fig. 5 is the electrical schematic diagram of the utility model final amplifier 3, and embodiment presses Fig. 5 connection line.Final amplifier 3 adopts balance structure for amplifying, the 3rd transistor V3 and the 4th transistor V4 Compositional balance structure, improve the second order dynamic indicator of amplifier, the 5th transformer T5 divides signal for same width, anti-phase 2 road signals equally, signal is amplified by the 3rd transistor V3 and the 4th transistor V4 after the 9th capacitor C 9 and the tenth capacitor C 10, amplifying signal after the 11 capacitor C the 11 and the 12 capacitor C 12 by the 6th transformer T6 synthesized output signal.Embodiment the 5th transformer T5 and the 6th transformer T6 adopt magnet ring NXO20007*4*2 and the coiling of diameter 0.1mm enamelled wire to form, the number of turns of coil winding density, coil is suitable, the 3rd transistor V3 and the 4th transistor V4 adopt commercially available MRF136 type element manufacturing, and the 9th inductance L 9 adopts commercially available HYL4201 type element manufacturing.
All the other resistance R of the each parts of the utility model, capacitor C, inductance L all adopt commercially available general-purpose device to make.
The concise and to the point operation principle of the utility model:
The short-wave signal input preselector 1 of antenna reception carries out after suboctave preliminary election filtering, enter again frequency mixer 10 and produced intermediate-freuqncy signal with local oscillation signal mixing, intermediate-freuqncy signal is input to low noise amplifier 11 and amplifies, through intermediate-frequency filter, 12 filtering curb after band stray amplifying signal again, finally enter final amplifier 3 output after afterbody amplifies; Power subsystem 5 is input to preselector 1, frequency converter 2, final amplifier 3 and control unit 4 after voltage is processed, and control unit 4 converts Transistor-Transistor Logic level control signal to diode driving voltage, controls the switch filter group in preselector 1.
Claims (6)
1. a short wave bandwidth low-converter, comprise preselector (1), frequency converter (2), final amplifier (3), control unit (4) and power subsystem (5), it is characterized in that: preselector (1), under the control of control unit (4), carries out exporting frequency converter (2) to after filtering to the short-wave signal of outside input; Frequency converter (2) exports final amplifier (3) to after obtaining intermediate-freuqncy signal and carry out amplification filtering after the signal of preselector (1) output pair and local oscillation signal mixing from outside; Final amplifier (3) carries out the amplification of low noise, high-gain and high linearity to the signal of frequency converter (2) output, final externally output.
2. short wave bandwidth low-converter according to claim 1, is characterized in that: described preselector (1) comprises amplitude limiter (6), first order switch (7), bank of filters (8) and second level switch (9); After amplitude limiter (6) carries out limited amplitude protection to the short-wave signal of outside input and export the switch filter group being made up of first order switch (7), bank of filters (8) and second level switch (9) to, switch filter group carries out exporting frequency converter (2) to after filtering according to sub-octave to the signal of inputting; First order switch (7) and second level switch (9) are controlled by control unit (4) respectively, for switching over.
3. short wave bandwidth low-converter according to claim 1, is characterized in that: described frequency converter (2) comprises frequency mixer (10), low noise amplifier (11) and intermediate-frequency filter (12); Frequency mixer (10) carries out mixing by the signal of preselector (1) output and the local oscillation signal of outside input and forms intermediate-freuqncy signal, and low noise amplifier (11) carries out after low noise amplification the intermediate-freuqncy signal of input, exports intermediate-frequency filter (12) to; Intermediate-frequency filter (12) carries out exporting final amplifier (3) to after filtering to the signal of low noise amplifier (11) output.
4. short wave bandwidth low-converter according to claim 3, it is characterized in that: described low noise amplifier (11) comprises first to fourth transformer (T1 to T4), the first to the 8th electric capacity (C1 to C8), the first to the 6th inductance (L1 to L6), and the first to the 6th resistance (R1 to R6) and first is to transistor seconds (V1 to V2), the first described transformer T1 input is connected with frequency mixer (10) output, the first transformer T1 output Yi road is connected with the second transformer T2 input after being connected in series successively the first capacitor C 1, the 3rd transformer T3, the first transistor V1, the 7th capacitor C 7, after another road output of the first transformer T1 output is connected in series the second capacitor C 2, the 4th transformer T4, transistor seconds V2, the 8th capacitor C 8 successively, be connected with second another input of transformer T2, the second transformer T2 output is connected with intermediate-frequency filter (12) input, one end of the first resistance R 1 is connected with the Vcc that power subsystem (5) provides, one end of the other end of the first resistance R 1 and the first inductance L 1, one end of the 5th capacitor C 5 also connects, the first inductance L 1 other end serial connection the 3rd inductance L 3, the collector electrode of the first transistor V1, the 3rd transformer T3 one end, other end serial connection the 3rd resistance R 3 of the 3rd inductance L 3, the other end of the 3rd resistance R 3 also connects the 3rd capacitor C 3, the 5th resistance R 5, the base stage of the first transistor V1, second resistance R 2 one end are connected with the Vcc that power subsystem (5) provides, one end of the other end and the second inductance L 2, one end of the 6th capacitor C 6 also connects, the second inductance L 2 other end serial connection the 4th inductance L 4, the collector electrode of transistor seconds V2, the 4th transformer T4 one end, other end serial connection the 4th resistance R 4 of the 4th inductance L 4, the other end of the 4th resistance R 4 also connects the 4th capacitor C 4, the 6th resistance R 6, the base stage of transistor seconds V2, the emitter of the first transistor V1 connects the 7th inductance L 7 ground connection, the emitter of transistor seconds V2 connects the 8th inductance L 8 ground connection, input the first transformer T1 by the intermediate-freuqncy signal after frequency mixer (10) frequency conversion signal level is divided into two-way, two-way output signal is synthesized and output to intermediate-frequency filter (12) with the second transformer T2 through first respectively after transistor seconds (V1 to V2) amplifies, and the third and fourth transformer (T3 and T4) forms respectively feedback circuit amplifying signal is fed back, the first and second transformers (T1 and T2) settling signal combiner is first to the impedance matching between transistor seconds (V1 to V2) and frequency mixer (10), intermediate-frequency filter (12).
5. short wave bandwidth low-converter according to claim 1, is characterized in that: described final amplifier (3) comprises the 5th to the 6th transformer (T5 to T6), the 9th to the 14 electric capacity (C9 to C14), the 7th to the 12 resistance (R7 to R12), the 7th to the 9th inductance (L7 to L9) and the 3rd to the 4th transistor (V3 to V4), the 5th described transformer T5 input is connected with frequency converter (2) output, the 5th transformer T5 output one tunnel serial connection the 9th capacitor C 9, the 3rd crystal amplifier V3, after the 11 capacitor C 11, be connected another road output serial connection the tenth capacitor C 10 with the 6th transformer T6 input, the 4th crystal amplifier V4, after the 14 capacitor C 14, be connected with the 6th another input of transformer T6, the 6th transformer T6 output is connected with signal output port, and the 7th resistance R 7 one end are connected with the 9th inductance L 9 center-side Vcc2 by after bleeder circuit, the grid of the other end and the 3rd crystal amplifier V3, the 7th inductance L 7 one end, the 9th capacitor C 9 one end also connect, the 7th inductance L 7 other end serial connection the 9th resistance R 9, after the 13 capacitor C 13 with the drain electrode of the 3rd crystal amplifier V3, the 11 capacitor C 11 one end, the 9th inductance L 9 one end also connect, and the 8th resistance R 8 one end are connected with the 9th inductance L 9 center-side Vcc2 by after bleeder circuit, the grid of the other end and the 4th crystal amplifier V4, the 8th inductance L 8 one end, the tenth capacitor C 10 one end also connect, the 8th inductance L 8 other end serial connection the tenth resistance R 10, after the 14 capacitor C 14 with the drain electrode of the 4th crystal amplifier V4, the 12 capacitor C 12 one end, the 9th inductance L 9 one end also connect, source electrode serial connection the 11 resistance R 11 ground connection of the 3rd crystal amplifier V3, and source electrode serial connection the 12 resistance R 12 ground connection of the 4th crystal amplifier V4, the 6th transformer T6 output port is connected with signal output port, by intermediate-freuqncy signal input the 5th transformer T5 after frequency converter (2) frequency conversion, signal is divided equally for two-way, two-way output signal is exported by the 6th transformer T6 is synthetic respectively after the 3rd to the 4th crystal amplifier (V3 to V4) amplifies, and the 7th inductance L 7, the 9th resistance R the 9 and the 11 capacitor C 11 and the 8th inductance L 8, the tenth resistance R the 10 and the 12 capacitor C 12 form respectively feedback circuit amplifying signal is fed back, the the 11 and the 12 resistance (R11 and R12) forms respectively feedback circuit amplifying signal is fed back, impedance matching between the 5th and the 6th transformer (T5 and T6) settling signal combiner and the 3rd to the 4th crystal amplifier (V3 to V4) and frequency converter (2), signal output port.
6. short wave bandwidth low-converter according to claim 3, is characterized in that: the frequency mixer that frequency mixer (10) selects field effect transistor to form, and the local oscillation signal of employing+23dBm high level drives.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869518.XU CN203617971U (en) | 2013-12-27 | 2013-12-27 | Shortwave broadband down converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320869518.XU CN203617971U (en) | 2013-12-27 | 2013-12-27 | Shortwave broadband down converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203617971U true CN203617971U (en) | 2014-05-28 |
Family
ID=50770587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320869518.XU Expired - Fee Related CN203617971U (en) | 2013-12-27 | 2013-12-27 | Shortwave broadband down converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203617971U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889219A (en) * | 2019-03-21 | 2019-06-14 | 中国电子科技集团公司第五十四研究所 | The short wave channel unit and multi-channel testing receiver of wide band narrow band flexibly configurable |
-
2013
- 2013-12-27 CN CN201320869518.XU patent/CN203617971U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109889219A (en) * | 2019-03-21 | 2019-06-14 | 中国电子科技集团公司第五十四研究所 | The short wave channel unit and multi-channel testing receiver of wide band narrow band flexibly configurable |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102324946A (en) | The high intermediate frequency front-end circuit of numerical control short-wave receiver | |
| CN105553494A (en) | Radio frequency front-end frequency selection circuit and signal receiving method thereof | |
| CN102412861A (en) | Emitting filter and mobile terminal | |
| CN203522706U (en) | Multi-band frequency source | |
| CN202798694U (en) | Short wave rear selector | |
| CN111917424A (en) | Low-emission broadband noise no-load short-wave radio station and implementation method thereof | |
| CN105429656A (en) | Signal processing device based on shortwave broadband reception demodulation front end | |
| CN103457618B (en) | Radio frequency chip front-end system and signal processing method thereof | |
| CN203617971U (en) | Shortwave broadband down converter | |
| CN103701487A (en) | Underwater wireless power and signal transmission system based on dual-frequency point resonant cavity | |
| CN103323860A (en) | Navigation receiver anti-saturation device based on direct radio frequency sampling | |
| CN201608711U (en) | Ultra-high speed short-wave band broadband preselector | |
| CN203522662U (en) | Mixed-control device for gain of short-wave receiver | |
| CN201663596U (en) | Cavity pre/post-selector | |
| CN202750077U (en) | Multi-frequency-range filter | |
| CN205232164U (en) | Broadband high -gain flatness power amplifier | |
| CN106712805A (en) | Shortwave pre-post selector | |
| CN109120289B (en) | Short-wave radio frequency front-end processing module and method | |
| CN203554433U (en) | Multiband transceiver used for wireless system | |
| CN202261255U (en) | Multichannel multi-medium frequency array frequency conversion receiving apparatus | |
| CN203104383U (en) | High Q quality band pass filter used for audio frequency near field payment | |
| CN203522670U (en) | Short-wave tracking tuned filter circuit | |
| CN204425324U (en) | A kind of video receiver | |
| CN103414490A (en) | Wireless telecom equipment with reconfigurable carrier frequency and reconfigurable signal bandwidth | |
| CN203691386U (en) | Ultrashort wave frequency conversion channel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140528 Termination date: 20211227 |