CN213461730U - Miniaturized low-power consumption receiver - Google Patents
Miniaturized low-power consumption receiver Download PDFInfo
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- CN213461730U CN213461730U CN202023096306.1U CN202023096306U CN213461730U CN 213461730 U CN213461730 U CN 213461730U CN 202023096306 U CN202023096306 U CN 202023096306U CN 213461730 U CN213461730 U CN 213461730U
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Abstract
The utility model discloses a miniaturized low-power consumption receiver, which consists of an 8G-26.5G down-conversion module and a 2M-8G down-conversion module, wherein the 8G-26.5G down-conversion module is used for converting 8G-26.5G radio frequency signals from an antenna into signals suitable for a 2M-8G receiving channel and inputting the signals into the 2M-8G down-conversion module; the 2M-8G frequency conversion module is used for receiving the output signal of the 8G-26.5G down conversion module or the 2M-8G radio frequency signal from an antenna; the 2M-8G frequency conversion module converts the signals of the 30M-8G frequency band into 4500M intermediate frequency signals and 2200M intermediate frequency signals, and then performs frequency mixing output on the 4500M intermediate frequency signals and the 2200M intermediate frequency signals; and 2M-30M are output in a direct mining mode. The utility model provides high receiving frequency band coverage, two modules do not interfere each other simultaneously, can improve the interference killing feature of receiver.
Description
Technical Field
The utility model belongs to the technical field of the radio frequency, concretely relates to miniaturized low-power consumption receiver.
Background
With the rapid development of modern communication, the use requirement on microwave frequency is further improved, and an ultra-wideband receiver can accurately monitor a fact signal, so that the ultra-wideband receiver is widely applied to multiple fields of radar, communication, electronic countermeasure and the like. The broadband receiver is mainly used for processing signals of each frequency band received by the antenna, and filtering, frequency-converting and amplifying the received signals so as to carry out digital processing on the signals.
The defects and shortcomings of the prior art are as follows:
1. the existing receiver covers a frequency band of 20-26500M, is large in size, is limited to be used at a fixed point, or is loaded by a vehicle, or is large in size, heavy and capable of bearing the back and consuming physical power.
2. The existing receiver has large power consumption, the high-performance receiver is often larger than 15W, and a fixed large power supply is needed to support the operation of the high-performance receiver.
3. The existing miniaturized ultra-wideband receiver has poor performance index, weak anti-interference capability and narrow coverage frequency.
SUMMERY OF THE UTILITY MODEL
In order to overcome current ultra wide band receiver interference killing feature poor, and the narrower problem of cover band, the utility model provides a miniaturized low-power consumption receiver.
The utility model discloses a following technical scheme realizes:
a small-sized low-power consumption receiver comprises a down-conversion module of 8G-26.5G and a frequency conversion module of 2M-8G,
the 8G-26.5G down-conversion module is used for converting 8G-26.5G radio frequency signals from an antenna into signals suitable for 2M-8G receiving channels and inputting the signals into the 2M-8G down-conversion module;
the 2M-8G frequency conversion module is used for receiving an output signal of the 8G-26.5G down conversion module or a 2M-8G radio frequency signal from an antenna;
the 2M-8G frequency conversion module converts the signals of the 30M-8G frequency band into 4500M intermediate frequency signals and 2200M intermediate frequency signals, and then performs frequency mixing output on the 4500M intermediate frequency signals and the 2200M intermediate frequency signals; and 2M-30M are output in a direct mining mode.
The utility model discloses an adopt two module superpositions of 8G ~ 26.5G down frequency conversion and 2M ~ 8G frequency conversion can cover 2M ~ 26.5G's arbitrary signal, improved the receiving frequency band coverage, two modules do not disturb each other simultaneously, can improve the interference killing feature of receiver.
Preferably, the 8G-26.5G down conversion module of the present invention comprises a radio frequency gain control unit a, a radio frequency preselector group a, a low noise amplifier B and a mixer a;
the radio frequency gain control unit A controls the gain of 8G-26.5G radio frequency signals from an antenna in a shunt way;
the signal processed by the radio frequency gain control unit is input into the radio frequency preselector group A, and the radio frequency preselector group A is used for filtering mirror intermediate frequency interference and second-order intermodulation signal interference in the input signal;
the signals processed by the radio frequency preselector group A are processed by the low noise amplifier B and then input to the mixer A;
and the mixer A mixes the radio frequency signal output by the low noise amplifier B with the radio frequency local oscillator input signal to output an intermediate frequency signal.
Preferably, the radio frequency gain control unit a of the present invention comprises a microstrip filter a, a single-pole multi-throw switch a, a low noise amplifier a, a radio frequency attenuator a, and a single-pole multi-throw switch B;
the low noise amplifier A, the radio frequency attenuator A and the through channel are arranged between the single-pole multi-throw switch A and the single-pole multi-throw switch B;
after 8G-26.5G radio frequency signals from an antenna are filtered by the microstrip filter A, the signals are selected by the single-pole multi-throw switch A to enter the low noise amplifier A for amplification or the radio frequency attenuator for attenuation or no processing, and then the signals are selected by the single-pole multi-throw switch B to be output to the radio frequency preselector group.
Preferably, the radio frequency preselector group of the utility model comprises a single-pole multi-throw switch C, a radio frequency filter group A and a single-pole multi-throw switch D;
and the signal output by the radio frequency gain control unit A is selected by the single-pole multi-throw switch C to enter the radio frequency filter bank A for segmented filtering, and then is selected by the single-pole multi-throw switch D for output.
Preferably, a low-pass filter a is further disposed between the low-noise amplifier B and the mixer; a low-pass filter B is also arranged after the mixer;
the low-pass filter A is used for filtering harmonic signals generated after the signals pass through the low-noise amplifier B;
the low-pass filter B is used for filtering local oscillator leakage and multiple frequency mixing interference after the frequency mixing of the frequency mixer.
Preferably, the 2M-8G frequency conversion module of the present invention comprises a single-pole double-throw switch, a radio frequency gain control unit B, a radio frequency preselector group B, a low noise amplifier D, a mixer B, an intermediate frequency filtering and gain control unit, a mixer C, a two-intermediate frequency gain control and filtering unit, an intermediate frequency amplifier D and a low pass filter F;
the single-pole double-throw switch is used for selectively receiving the output signal of the 8G-26.5G down-conversion module or the 2M-8G radio frequency signal from the antenna;
the radio frequency gain control unit B is used for carrying out gain control on the signals input into the 2M-8G frequency conversion module;
the radio frequency preselector group B carries out segmented filtering processing on the 30M-8G signals processed by the radio frequency gain control unit B or directly sends the 2M-30M signals processed by the radio frequency gain control unit B to the two intermediate frequency gain control and filtering units;
the signals processed by the radio frequency preselector group B are input to the mixer B after being processed by the low noise amplifier D;
the mixer B mixes the radio frequency signal from the low noise amplifier with an input local oscillation signal;
the signal after being mixed by the mixer B is filtered and gain-controlled by the intermediate frequency filtering and gain control unit and then is input to the mixer C;
the mixer C mixes the signal processed by the intermediate frequency filtering and gain control unit with an input local oscillation signal;
the signals mixed by the mixer C are processed by the two intermediate frequency gain control and filtering units and then input to the intermediate frequency amplifier D;
and the intermediate frequency amplifier D amplifies the input signal and then filters and outputs the amplified signal through the low-pass filter F.
Preferably, the radio frequency gain control unit B of the present invention comprises a single-pole multi-throw switch E, a radio frequency attenuator B, a low noise amplifier C, and a single-pole multi-throw switch F;
the radio frequency attenuator B, the low noise amplifier C and the through channel are arranged between the single-pole multi-throw switch E and the single-pole multi-throw switch F in parallel;
the signal output by the single-pole double-throw switch is selected by the single-pole double-throw switch E to enter the radio frequency attenuator B for attenuation processing or enter the low noise amplifier C for amplification processing or be not processed and then is selected by the single-pole double-throw switch F for output.
Preferably, the radio frequency preselector group B of the present invention includes a single-pole multi-throw switch G, a radio frequency preselector group B, and a single-pole multi-throw switch H;
the signal output by the radio frequency gain control unit B is selected by the single-pole multi-throw switch G to enter the radio frequency preselection filter bank B for segmented filtering, and then is selected by the single-pole multi-throw switch H for output;
and the radio frequency preselection filter in the radio frequency preselection filter group B adopts a ceramic filter.
Preferably, the intermediate frequency filtering and gain control unit of the present invention comprises a low pass filter D, an intermediate frequency filter a, an intermediate frequency amplifier a, an intermediate frequency filter B and an intermediate frequency attenuator a;
the signal mixed by the mixer B is filtered by the low-pass filter D and then input to the intermediate frequency filter a;
the intermediate frequency filter A filters an input signal and inputs the signal to the intermediate frequency amplifier A;
the intermediate frequency amplifier A amplifies an input signal and inputs the amplified signal to the intermediate frequency filter B;
the intermediate frequency filter B processes an input signal and inputs the processed signal to the intermediate frequency attenuator A;
the intermediate frequency attenuator A attenuates the input signal and inputs the attenuated signal into the mixer C.
Preferably, the second intermediate frequency gain control and filtering unit of the present invention comprises an intermediate frequency filter C, an intermediate frequency amplifier B, an intermediate frequency attenuator B, a temperature control attenuator a, a low pass filter E, an intermediate frequency preselector group, an intermediate frequency amplifier C, an intermediate frequency attenuator C, and a temperature control attenuator B;
the signals mixed by the mixer C are filtered by the intermediate frequency filter C and then input to the intermediate frequency amplifier B;
the intermediate frequency amplifier B amplifies the input signal and inputs the amplified signal to the intermediate frequency attenuator B for gain control;
inputting the signal processed by the intermediate frequency attenuator B into the temperature control attenuator A for processing;
inputting the signal processed by the temperature control attenuator A into the low-pass filter E for low-pass filtering;
the intermediate frequency preselector group performs bandwidth control on the signals processed by the low-pass filter or performs selective output on 2M-30M signals directly output by the radio frequency preselector group B;
the signals output by the intermediate frequency preselector group are sequentially input into the intermediate frequency amplifier C, the intermediate frequency attenuator C and the temperature control attenuator B for gain control;
and the intermediate frequency preselection filter in the intermediate frequency preselection group adopts a sound table filter.
The utility model discloses have following advantage and beneficial effect:
1. the utility model discloses a receiver can receive the ultra wide band signal that covers 2M ~ 26.5G frequency through the stack use of two modules of 8G ~ 26.5G down conversion module and 2M ~ 8G frequency conversion module.
2. The volume of the 2M-8G frequency conversion module in the receiver of the utility model can be 80mm 110mm 20mm, the weight is 250G, and the power consumption is 8W; the 8-26.5G down-conversion module can be used for obtaining 50mm by 150mm, the weight is 300, and the power consumption is 3W; the utility model discloses a two modules of receiver all have the low-power consumption mode, and the stand-by power consumption is less than 1W.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic block diagram of a receiver according to the present invention.
Fig. 2 is a schematic diagram of the receiver structure of the present invention.
Reference numbers and corresponding part names in the drawings:
1-microstrip filter A, 2-single-pole multi-throw switch A, 3-low noise amplifier A, 4-radio frequency attenuator A, 5-single-pole multi-throw switch B, 6-single-pole multi-throw switch C, 7-radio frequency preselection filter bank A, 8-single-pole multi-throw switch D, 9-low noise amplifier B, 10-low pass filter A, 11-mixer A, 12-low pass filter B, 13-single-pole double throw switch A, 14-single-pole multi-throw switch E, 15-radio frequency attenuator B, 16-low noise amplifier C, 17-single-pole multi-throw switch F, 18-single-pole multi-throw switch G, 19-preselection radio frequency filter bank B, 20-single-pole multi-throw switch H, 21-low noise amplifier D, 22-low pass filter C, 23-mixer B, 24-low-pass filter D, 25-intermediate-frequency filter A, 26-intermediate-frequency amplifier A, 27-intermediate-frequency filter B, 28-intermediate-frequency attenuator A, 29-mixer C, 30-intermediate-frequency filter C, 31-intermediate-frequency amplifier B, 32-intermediate-frequency attenuator B, 33-temperature-controlled attenuator A, 34-low-pass filter E, 35-single-pole multi-throw switch I, 36-intermediate-frequency filter D, 37-intermediate-frequency filter E, 38-intermediate-frequency filter F, 39-single-pole multi-throw switch J, 40-intermediate-frequency amplifier C, 41-intermediate-frequency attenuator C, 42-temperature-controlled attenuator B, 43-intermediate-frequency amplifier D, 44-low-pass filter F.
Detailed Description
Hereinafter, the terms "include" or "may include" used in various embodiments of the present invention indicate the existence of the functions, operations or elements of the present invention, and do not limit the addition of one or more functions, operations or elements. Furthermore, as used in various embodiments of the present invention, the terms "comprises," "comprising," "includes," "including," "has," "having" and their derivatives are intended to refer only to the particular feature, number, step, operation, element, component, or combination of the foregoing, and should not be construed as first excluding the existence of, or adding to, one or more other features, numbers, steps, operations, elements, components, or combination of the foregoing.
In various embodiments of the present invention, the expression "or" at least one of a or/and B "includes any or all combinations of the words listed simultaneously. For example, the expression "a or B" or "at least one of a or/and B" may include a, may include B, or may include both a and B.
Expressions (such as "first", "second", and the like) used in various embodiments of the present invention may modify various constituent elements in various embodiments, but may not limit the respective constituent elements. For example, the above description does not limit the order and/or importance of the elements described. The foregoing description is for the purpose of distinguishing one element from another. For example, the first user device and the second user device indicate different user devices, although both are user devices. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, without departing from the scope of various embodiments of the present invention.
It should be noted that: if it is described that one constituent element is "connected" to another constituent element, the first constituent element may be directly connected to the second constituent element, and a third constituent element may be "connected" between the first constituent element and the second constituent element. In contrast, when one constituent element is "directly connected" to another constituent element, it is understood that there is no third constituent element between the first constituent element and the second constituent element.
The terminology used in the various embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the various embodiments of the invention. As used herein, the singular forms are intended to include the plural forms as well, unless the context clearly indicates otherwise. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the various embodiments of the present invention belong. The terms (such as those defined in commonly used dictionaries) should be interpreted as having a meaning that is consistent with their contextual meaning in the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein in various embodiments of the present invention.
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
Compared with the existing broadband receiver, the embodiment provides a miniaturized low-power-consumption receiver. The receiver of this embodiment mainly comprises an 8G-26.5G down-conversion module and a 2M-8G frequency conversion module, and the receiver of this embodiment can implement 3 frequency conversion schemes through two modules, and adopts different frequency conversion schemes for different frequencies: wherein, the signals of 8G to 26.5G pass through the complete receiver system, the frequency conversion is carried out for 3 times in total, the local oscillation signals of a plurality of fixed points are only needed for one time of frequency conversion, the received signals of 8G to 26.5G are converted into the frequency bands of 3G to 8G, and then the signals are linked with the input stage of the next-stage module. The 30M-8G uses two frequency conversion, an upper frequency conversion part and a lower frequency conversion part, wherein the 30M-3.2G adopts an up-conversion mode to convert the signal frequency to 4500M intermediate frequency, the 3.2G-8G adopts a down-conversion mode to convert the signal to 2200M intermediate frequency, then the two intermediate frequency signals are further filtered to remove interference, then frequency mixing is carried out to output the final intermediate frequency signal, and the final stage of the product mainly realizes filtering, gain control and attenuation control. 2M-30M adopt the mode of directly adopting to carry out the output, directly export the switch of output stage through the switch, directly adopt the signal and twice frequency conversion signal share amplification and gain control, reduced the device quantity of product in order to reduce the volume.
Specifically, as shown in fig. 1, the 8G to 26.5G down-conversion module of this embodiment includes a radio frequency gain control unit a, a radio frequency preselector group a, a low noise amplifier B, and a mixer a.
The rf gain control unit a of this embodiment performs gain control on 8G to 26.5G rf signals from the antenna in a shunt manner, and the rf gain control unit a of this embodiment can achieve a gain control range of up to 45dB, which can greatly improve the dynamic range of the receiver.
The signal processed by the radio frequency gain control unit is input into a radio frequency preselector group A, and the radio frequency preselector group A is used for filtering mirror intermediate frequency interference and second-order intermodulation signal interference in the input signal; the radio frequency preselector group A of the embodiment is divided into 6 paths of radio frequency filters (preselector filters A-F arranged between the single-pole multi-throw switch C and the single-pole multi-throw switch D in parallel) which can better filter out mirror intermediate frequency interference and second-order intermodulation signal interference.
The signals processed by the radio frequency preselector group A are processed by a low noise amplifier B and then input into a mixer A;
the mixer a of this embodiment mixes the radio frequency signal output by the low noise amplifier B with the radio frequency local oscillator input signal to output an intermediate frequency signal. The frequency mixer A of the embodiment can convert the frequency of the signal to be suitable for 2M-8G receiving channels only by a plurality of single-point local oscillators, and locks the output frequency of the down-conversion module in 3G-8G during design for facilitating filtering of intermediate frequency signals of a superior mirror.
Specifically, as shown in fig. 2, the radio frequency gain control unit a of the present embodiment includes a microstrip filter a, a single-pole multi-throw switch a, a low noise amplifier a, a radio frequency attenuator a, and a single-pole multi-throw switch B;
the low noise amplifier A, the radio frequency attenuator A and the through channel are arranged between the single-pole multi-throw switch A and the single-pole multi-throw switch B in parallel;
after 8G-26.5G radio frequency signals from the antenna are filtered by the microstrip filter A, the signals are selected by the single-pole multi-throw switch A to enter the low-noise amplifier A for amplification or the radio frequency attenuator for attenuation or no treatment (direct connection), and then the signals are selected by the single-pole multi-throw switch B to be output to the radio frequency preselector group.
The radio frequency preselector group comprises a single-pole multi-throw switch C, a radio frequency filter group A and a single-pole multi-throw switch D;
the signal output by the radio frequency gain control unit A is selected by the single-pole multi-throw switch C to enter the radio frequency filter bank A for segmented filtering, and then is selected by the single-pole multi-throw switch D for output. The radio frequency filter bank of the present embodiment includes preselection filters a-F arranged in parallel between a single pole, multiple throw switch C and a single pole, multiple throw switch D.
In the embodiment, a low-pass filter A is also arranged between the low-noise amplifier B and the mixer; a low-pass filter B is also arranged after the mixer;
the low-pass filter A is used for filtering harmonic signals generated after the signals pass through the low-noise amplifier B;
the low-pass filter B is used for filtering local oscillator leakage and multiple frequency mixing interference after frequency mixing of the frequency mixer.
Specifically, as shown in fig. 2, the 2M to 8G frequency conversion module of the present embodiment includes a single-pole double-throw switch, a radio frequency gain control unit B, a radio frequency preselector group B, a low noise amplifier D, a mixer B, an intermediate frequency filter and gain control unit, a mixer C, a two-intermediate frequency gain control and frequency filter unit, an intermediate frequency amplifier D, and a low pass filter F.
The single-pole double-throw switch of the embodiment is used for selectively receiving output signals of 8G-26.5G down-conversion modules or 2M-8G radio frequency signals from an antenna.
The radio frequency gain control unit B is used for carrying out gain control on signals input into the 2M-8G frequency conversion module.
The radio frequency preselector group B carries out segmented filtering processing on the 30M-8G signals processed by the radio frequency gain control unit B or directly sends the 2M-30M signals processed by the radio frequency gain control unit B to the two intermediate frequency gain control and filtering units; the rf pre-selector group B of the present embodiment is used to filter out the mirror if rejection and the second-order intermodulation signal.
The signal processed by the radio frequency preselector group B is input to a mixer B after being processed by a low noise amplifier D;
the mixer B mixes the radio frequency signal from the low noise amplifier with the input local oscillation signal; the mixer B of this embodiment is mainly used to convert the 30M-8G signals to 4500M and 2200M single-point signals.
The signal after being mixed by the mixer B is filtered and gain-controlled by an intermediate frequency filtering and gain control unit and then is input to a mixer C; the if filtering and gain control unit of this embodiment is mainly used to filter and gain control 4500M and 2200M signals, and mainly filter out unwanted products of the mixer and signals leaked from the local oscillator.
The mixer C mixes the signal processed by the intermediate frequency filtering and gain control unit with the input local oscillation signal; the mixer C of this embodiment mainly changes the signals from 4500M and 2200M to intermediate frequency signals required by digital processing.
The signals after being mixed by the mixer C are processed by two intermediate frequency gain control and filtering units and then input to an intermediate frequency amplifier D; the two if gain control and filter units of this embodiment are mainly used for gain calibration, and can make the receiver more suitable for each temperature condition.
The intermediate frequency amplifier D amplifies the input signal and filters the signal through the low pass filter F. The low pass filter of the present embodiment is used to filter out intermediate frequency output harmonics.
The radio frequency gain control unit B of the present embodiment includes a single-pole multi-throw switch E, a radio frequency attenuator B, a low noise amplifier C, and a single-pole multi-throw switch F;
the radio frequency attenuator B, the low noise amplifier C and the through channel are arranged between the single-pole multi-throw switch E and the single-pole multi-throw switch F in parallel;
the signal output by the single-pole double-throw switch is selected by the single-pole double-throw switch E to enter a radio frequency attenuator B for attenuation treatment or enter a low noise amplifier C for amplification treatment or not (direct connection), and then is selected by the single-pole double-throw switch F for output.
The radio frequency preselector group B of the embodiment comprises a single-pole multi-throw switch G, a radio frequency preselection filter group B and a single-pole multi-throw switch H;
the signal output by the radio frequency gain control unit B enters a radio frequency preselection filter bank B for segmented filtering by a single-pole multi-throw switch G, and then is selectively output by a single-pole multi-throw switch H. In this embodiment, a single-pole multi-throw switch G is used to select and send the 30M to 8G signals output by the rf gain control unit B to the rf pre-selection filter bank B for segmented filtering or directly transmit the 2M to 30M signals output by the rf gain control unit B to the two if gain control and filtering unit. The radio frequency preselection filter group B of the embodiment comprises preselection filters G-L which are arranged between a single-pole multi-throw switch G and a single-pole multi-throw switch H in parallel.
The intermediate frequency filtering and gain control unit of the embodiment comprises a low pass filter D, an intermediate frequency filter A, an intermediate frequency amplifier A, an intermediate frequency filter B and an intermediate frequency attenuator A;
the signal after being mixed by the mixer B is filtered by a low-pass filter D and then is input to an intermediate frequency filter A;
the intermediate frequency filter A filters an input signal and inputs the signal to the intermediate frequency amplifier A;
the intermediate frequency amplifier A amplifies the input signal and inputs the amplified signal to an intermediate frequency filter B;
the intermediate frequency filter B processes the input signal and inputs the processed signal into the intermediate frequency attenuator A;
the intermediate frequency attenuator A attenuates the input signal and inputs the attenuated signal to the mixer C.
The second intermediate frequency gain control and filtering unit of the embodiment comprises an intermediate frequency filter C, an intermediate frequency amplifier B, an intermediate frequency attenuator B, a temperature control attenuator A, a low pass filter E, an intermediate frequency preselector group, an intermediate frequency amplifier C, an intermediate frequency attenuator C and a temperature control attenuator B;
the signals mixed by the mixer C are filtered by the intermediate frequency filter C and then input to the intermediate frequency amplifier B;
the intermediate frequency amplifier B amplifies the input signal and inputs the amplified signal into the intermediate frequency attenuator B for gain control;
inputting the signal processed by the intermediate frequency attenuator B into a temperature control attenuator A for processing;
inputting the signal processed by the temperature control attenuator A into a low-pass filter E for low-pass filtering;
inputting the signal processed by the low-pass filter into an intermediate frequency preselector group for bandwidth control;
and the signals processed by the intermediate frequency preselector group are sequentially input into an intermediate frequency amplifier C, an intermediate frequency attenuator C and a temperature control attenuator B for gain control.
The intermediate frequency preselector group of the embodiment comprises a single-pole multi-throw switch I, a single-pole multi-throw switch J, and an intermediate frequency filter D, an intermediate frequency filter E and an intermediate frequency filter F which are arranged between the single-pole multi-throw switch I and the single-pole multi-throw switch J in parallel.
The low-pass filter E, the single-pole multi-throw switch I, the intermediate-frequency filter D, the intermediate-frequency filter E, the intermediate-frequency filter F and the single-pole multi-throw switch J of the embodiment jointly realize intermediate-frequency output broadband control so as to realize application in different scenes. In this embodiment, a single-pole multi-throw switch J is used to selectively output 2M to 3M signals selectively transmitted by the single-pole multi-throw switch G or selectively output an intermediate frequency signal after filtering processing by an intermediate frequency filter D or an intermediate frequency filter E or an intermediate frequency filter F to a subsequent stage.
The receiver of the present embodiment can control to realize the mode in 5: the frequency conversion device comprises a low power consumption mode, a small gain mode, a 2M-30M direct sampling mode, a 30M-8G twice frequency conversion mode and an 8G-26.5G three-time frequency conversion mode.
The low power consumption mode product is in a standby state, only the control part and the product crystal oscillator work at the moment, the power consumption of the product is less than 1W, and long-time standby can be realized.
When the low gain mode works, the low noise amplifier A, the low noise amplifier C and the intermediate frequency amplifier A are in an off state (the intermediate frequency amplifier A is in a through mode when the intermediate frequency amplifier A is off) so as to reduce the power consumption of a product when receiving a large signal and ensure the dynamic range of the product when the power is high.
In the 2M-30M direct-adoption working mode, only the intermediate frequency amplifier C, the intermediate frequency amplifier D, the control part and the crystal oscillator work, and the power consumption of the product is reduced to 3W.
And in a 30M-8G working mode, the product belongs to a normal working mode, the down-conversion module is in a closed state, the power consumption of the whole machine is 8W, the small gain mode can be simultaneously started, and the power consumption of the product is reduced to 7W after the small gain mode is started.
8G-26.5G, the product works in a full line mode at the moment, the total power consumption is 11W, and the power consumption can be reduced to 10W after the small gain mode is started.
The receiver internal devices of the embodiment are small-size devices, the PCB is fully utilized for layout, and the PCB space is fully utilized under the condition of ensuring the electromagnetic compatibility and the anti-interference capability of the product. The micro-strip line filter for high frequency replaces part of the original cavity filter, so that the space occupation is greatly reduced, the preselection filters G-L all adopt small-volume ceramic filters to replace the original LC filters, the intermediate frequency filters D-F adopt acoustic surface filters to replace the original LC filters, the small-volume high performance is realized, and various different output bandwidth requirements can be provided while the small volume is realized. All mixers in the figure adopt mixers with local oscillator driving amplifiers, so that the number of the local oscillator driving amplifiers is reduced, and the occupied space is reduced. The final 2M-8G module volume was 80mm 110mm 20 mm. The 8-26.5G down-conversion module is 50mm by 150 mm.
The receiver casing and the shielding chamber of this embodiment select for use the magnalium alloy material that weight is lighter, have carried out further processing to the casing simultaneously, and the useless entity part of fretwork replaces partial shielding chamber with novel absorbing material, alleviates product weight when guaranteeing shielding nature, interference killing feature and stability, and final complete machine weight is about 550 g.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A miniaturized low-power consumption receiver is characterized in that the receiver consists of an 8G-26.5G down-conversion module and a 2M-8G frequency conversion module,
the 8G-26.5G down-conversion module is used for converting 8G-26.5G radio frequency signals from an antenna into signals suitable for 2M-8G receiving channels and inputting the signals into the 2M-8G down-conversion module;
the 2M-8G frequency conversion module is used for receiving an output signal of the 8G-26.5G down conversion module or a 2M-8G radio frequency signal from an antenna;
the 2M-8G frequency conversion module converts the signals of the 30M-8G frequency band into 4500M intermediate frequency signals and 2200M intermediate frequency signals, and then performs frequency mixing output on the 4500M intermediate frequency signals and the 2200M intermediate frequency signals; and 2M-30M are output in a direct mining mode.
2. The miniaturized low-power consumption receiver of claim 1, wherein the 8G-26.5G down-conversion module comprises a radio frequency gain control unit a, a radio frequency preselector group a, a low-noise amplifier B and a mixer a;
the radio frequency gain control unit A controls the gain of 8G-26.5G radio frequency signals from an antenna in a shunt way;
the signal processed by the radio frequency gain control unit is input into the radio frequency preselector group A, and the radio frequency preselector group A is used for filtering mirror intermediate frequency interference and second-order intermodulation signal interference in the input signal;
the signals processed by the radio frequency preselector group A are processed by the low noise amplifier B and then input to the mixer A;
and the mixer A mixes the radio frequency signal output by the low noise amplifier B with the radio frequency local oscillator input signal to output an intermediate frequency signal.
3. The miniaturized low-power consumption receiver of claim 2, wherein the radio frequency gain control unit A comprises a microstrip filter A, a single-pole multi-throw switch A, a low noise amplifier A, a radio frequency attenuator A, a single-pole multi-throw switch B;
the low noise amplifier A, the radio frequency attenuator A and the through channel are arranged between the single-pole multi-throw switch A and the single-pole multi-throw switch B in parallel;
after 8G-26.5G radio frequency signals from an antenna are filtered by the microstrip filter A, the signals are selected by the single-pole multi-throw switch A to enter the low noise amplifier A for amplification or the radio frequency attenuator for attenuation or no processing, and then the signals are selected by the single-pole multi-throw switch B to be output to the radio frequency preselector group.
4. The miniaturized low power consumption receiver of claim 2, wherein the radio frequency preselector group comprises a single-pole multi-throw switch C, a radio frequency filter group a, and a single-pole multi-throw switch D;
and the signal output by the radio frequency gain control unit A is selected by the single-pole multi-throw switch C to enter the radio frequency filter bank A for segmented filtering, and then is selected by the single-pole multi-throw switch D for output.
5. A miniaturized, low-power consumption receiver according to any of claims 2-4, characterized in that a low-pass filter A is further arranged between said low-noise amplifier B and said mixer; a low-pass filter B is also arranged after the mixer;
the low-pass filter A is used for filtering harmonic signals generated after the signals pass through the low-noise amplifier B;
the low-pass filter B is used for filtering local oscillator leakage and multiple frequency mixing interference after the frequency mixing of the frequency mixer.
6. The miniaturized low power consumption receiver of claim 1, wherein the 2M-8G frequency conversion module comprises a single-pole double-throw switch, a radio frequency gain control unit B, a radio frequency preselector group B, a low noise amplifier D, a mixer B, an intermediate frequency filtering and gain control unit, a mixer C, a double intermediate frequency gain control and filtering unit, an intermediate frequency amplifier D and a low pass filter F;
the single-pole double-throw switch is used for selectively receiving the output signal of the 8G-26.5G down-conversion module or the 2M-8G radio frequency signal from the antenna;
the radio frequency gain control unit B is used for carrying out gain control on the signals input into the 2M-8G frequency conversion module;
the radio frequency preselector group B carries out segmented filtering processing on the 30M-8G signals processed by the radio frequency gain control unit B or directly sends the 2M-30M signals processed by the radio frequency gain control unit B to the two intermediate frequency gain control and filtering units;
the signals processed by the radio frequency preselector group B are input to the mixer B after being processed by the low noise amplifier D;
the mixer B mixes the radio frequency signal from the low noise amplifier with an input local oscillation signal;
the signal after being mixed by the mixer B is filtered and gain-controlled by the intermediate frequency filtering and gain control unit and then is input to the mixer C;
the mixer C mixes the signal processed by the intermediate frequency filtering and gain control unit with an input local oscillation signal;
the signals mixed by the mixer C are processed by the two intermediate frequency gain control and filtering units and then input to the intermediate frequency amplifier D;
and the intermediate frequency amplifier D amplifies the input signal and then filters and outputs the amplified signal through the low-pass filter F.
7. The miniaturized low-power consumption receiver of claim 6, wherein the radio frequency gain control unit B comprises a single-pole multi-throw switch E, a radio frequency attenuator B, a low noise amplifier C and a single-pole multi-throw switch F;
the radio frequency attenuator B, the low noise amplifier C and the through channel are arranged between the single-pole multi-throw switch E and the single-pole multi-throw switch F in parallel;
the signal output by the single-pole double-throw switch is selected by the single-pole double-throw switch E to enter the radio frequency attenuator B for attenuation processing or enter the low noise amplifier C for amplification processing or be not processed and then is selected by the single-pole double-throw switch F for output.
8. The miniaturized low power consumption receiver of claim 7, wherein the radio frequency preselector group B comprises a single-pole multi-throw switch G, a radio frequency preselector group B and a single-pole multi-throw switch H;
the signal output by the radio frequency gain control unit B is selected by the single-pole multi-throw switch G to enter the radio frequency preselection filter bank B for segmented filtering, and then is selected by the single-pole multi-throw switch H for output;
and the radio frequency preselection filter in the radio frequency preselection filter group B adopts a ceramic filter.
9. A miniaturized, low-power consumption receiver according to claim 8, characterized in that said if filtering and gain control unit comprises a low pass filter D, an if filter a, an if amplifier a, an if filter B and an if attenuator a;
the signal mixed by the mixer B is filtered by the low-pass filter D and then input to the intermediate frequency filter a;
the intermediate frequency filter A filters an input signal and inputs the signal to the intermediate frequency amplifier A;
the intermediate frequency amplifier A amplifies an input signal and inputs the amplified signal to the intermediate frequency filter B;
the intermediate frequency filter B processes an input signal and inputs the processed signal to the intermediate frequency attenuator A;
the intermediate frequency attenuator A attenuates the input signal and inputs the attenuated signal into the mixer C.
10. The miniaturized low power consumption receiver of claim 9, wherein the two intermediate frequency gain control and filtering units comprise an intermediate frequency filter C, an intermediate frequency amplifier B, an intermediate frequency attenuator B, a temperature control attenuator a, a low pass filter E, an intermediate frequency preselector group, an intermediate frequency amplifier C, an intermediate frequency attenuator C, and a temperature control attenuator B;
the signals mixed by the mixer C are filtered by the intermediate frequency filter C and then input to the intermediate frequency amplifier B;
the intermediate frequency amplifier B amplifies the input signal and inputs the amplified signal to the intermediate frequency attenuator B for gain control;
inputting the signal processed by the intermediate frequency attenuator B into the temperature control attenuator A for processing;
inputting the signal processed by the temperature control attenuator A into the low-pass filter E for low-pass filtering;
the intermediate frequency preselector group performs bandwidth control on the signals processed by the low-pass filter or performs selective output on 2M-30M signals directly output by the radio frequency preselector group B;
the signals output by the intermediate frequency preselector group are sequentially input into the intermediate frequency amplifier C, the intermediate frequency attenuator C and the temperature control attenuator B for gain control;
and the intermediate frequency preselection filter in the intermediate frequency preselection group adopts a sound table filter.
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| CN112688703A (en) * | 2020-12-21 | 2021-04-20 | 成都美数科技有限公司 | Miniaturized low-power consumption receiver |
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| CN112688703A (en) * | 2020-12-21 | 2021-04-20 | 成都美数科技有限公司 | Miniaturized low-power consumption receiver |
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