CN208939952U - Radio frequency front-end unit for radio integration test module - Google Patents
Radio frequency front-end unit for radio integration test module Download PDFInfo
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- CN208939952U CN208939952U CN201822126164.5U CN201822126164U CN208939952U CN 208939952 U CN208939952 U CN 208939952U CN 201822126164 U CN201822126164 U CN 201822126164U CN 208939952 U CN208939952 U CN 208939952U
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Abstract
The utility model relates to testing radio fields, more particularly to a kind of radio frequency front-end unit for radio integration test module, including attenuator, power splitter, radio frequency improves filter circuit, first frequency mixer, intermediate frequency filtering amplifying circuit, the second frequency mixer, filtered amplitude improves amplifying circuit, first local oscillator generator, reference clock circuit, the second local oscillator generator；First local oscillator generator, the second local oscillator generator generate local oscillation signal, rf inputs are mixed twice after passing through radio frequency attenuator, then by a radio frequency amplitude conditioning and an intermediate-freuqncy signal amplitude conditioning, the intermediate-freuqncy signal for generating a required amplitude, which is sent to signal-processing board, makees rear class processing.The utility model provides a kind of radio frequency front-end unit for radio comprehensive measurement instrument to realize the measurement to multiple functions.
Description
Technical field
It is the utility model relates to a kind of testing radio device, in particular to a kind of for radio comprehensive test device
Radio frequency front-end unit.
Background technique
Electronic product is very flourishing now, and demand is also comparable big.It is usually big by factory when manufacturing electronic product
After amount manufacture, then via the various functions of test organization's test electronic product.Only pass through the electronic product of all test items
It can dispatch from the factory and send to client, to ensure that dispatched from the factory electronic product maintains certain level.However, existing in communication device at present
Field test equipment uses single test, and an instrument only measures a few functions, can not achieve the measurement of multiple functions.
Utility model content
The purpose of utility model of the utility model is: in order to which solution must not be on same instrument to the measurement of multiple functions
The problem of, a kind of radio frequency front-end unit for radio comprehensive measurement instrument is provided.
To achieve the goals above, the technical solution adopted in the utility model are as follows:
A kind of radio frequency front-end unit for radio comprehensive measurement instrument, including attenuator, power splitter, radio frequency conditioning filtering
Circuit, the first frequency mixer, intermediate frequency filtering amplifying circuit, the second frequency mixer, filtered amplitude improve amplifying circuit, and the first local oscillator occurs
Device, reference clock circuit, the second local oscillator generator；In the receiving mode, the radiofrequency signal inputted by RF interface successively passes through institute
It states attenuator decaying and is input to institute after the power splitter power distribution and the radio frequency improve the conditioning of filter circuit, filtering
The first frequency mixer is stated, the local oscillation signal that the signal and first local oscillator generator that first frequency mixer is used to input generate
It is mixed, obtains the first mixed frequency signal；After first mixed frequency signal filters through the intermediate frequency filtering amplifying circuit, amplifies, input
To second frequency mixer, the local oscillator of signal and second local oscillator generator generation that second frequency mixer is used to input
Signal is mixed, and the second mixed frequency signal is obtained；Second mixed frequency signal carries out radio frequency through filtered amplitude conditioning amplifying circuit
It is exported after amplitude conditioning, the conditioning of intermediate-freuqncy signal amplitude and amplification；Wherein reference clock circuit be first local oscillator generator,
Second local oscillator generator provides reference clock.
The radio frequency front-end unit further includes Direct Digital Frequency Synthesizers, attenuation amplitude conditioning circuit, third mixing
Device, filter amplification circuit, the 4th frequency mixer and AGC electricity tune attenuator circuit；Under the mode as signal source, the Direct Digital
The modulated signal that frequency synthesizer is generated is exported to the AGC electricity tune attenuator circuit, and the modulated signal is through the AGC electricity tune
After attenuator circuit carries out a fine conditioning to the amplitude of signal, it is input to the third frequency mixer, the third frequency mixer is used
In the signal of input to be mixed with the local oscillation signal that second local oscillator generator generates, third mixed frequency signal is obtained；The
After three mixed frequency signals are filtered and amplify through the filter amplification circuit, it is input to the 4th frequency mixer, the described 4th
Frequency mixer obtains the 4th mixing for the signal of input to be mixed with the local oscillation signal that first local oscillator generator generates
Signal, the 4th mixed frequency signal pass through the function after coarse adjustment part of the attenuation amplitude conditioning circuit to amplitude improves
Device is divided to export to the attenuator, the attenuator passes through the modulated signal that the RF interface inputs high quality.
The radio frequency front-end unit further includes power detection module, and the power detection module includes power detector, fortune
Calculate amplifier and programmable logic device；The signal of power splitter third output end is detected, is transported by the power detection module
After calculating amplification and logical process, it is input to control processing module；Attenuation amplitude tune described in the power detection module feedback control
Manage the attenuation amplitude of circuit and the attenuation amplitude of the AGC electricity tune attenuator circuit.
The AGC electricity tune attenuator circuit has a signal input part, for accessing external signal.
In conclusion by adopting the above-described technical solution, the beneficial effects of the utility model are: with prior art phase
Than the utility model is the set for realizing a variety of measurement functions, generates two-way local oscillation signal using HMC830, in the receiving mode
Rf inputs are mixed after passing through 10dB radio frequency attenuator, then pass through the radio frequency amplitude conditioning of a 30dB and one
The intermediate-freuqncy signal amplitude of 30dB improves, and generates the 31.1MHz intermediate-freuqncy signal of a required amplitude；In the mode as signal source
Under, the modulated signal (or external 21.4MHz signal) of a 171MHz is generated by AD9910, passes through an electrically controlled attenuator
(20dB adjustable extent) carries out a fine conditioning to the amplitude of signal, then carries out secondary mixing with two local oscillation signals, generates
Required 2~1000MHz signal adjusts the coarse adjustment part of amplitude finally by two cascade 30dB radio frequency attenuators
Reason, system automatically controls amplitude conditioning range after amplitude conditioning is detected by power detector；It provides and a kind of has used DDS skill
The radio frequency front-end unit of art and PLL technology, so that the comprehensive tester comprising this unit realizes the measurement of a variety of radio signals.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the reception pattern structural schematic diagram of the utility model.
Fig. 3 is the reception pattern structural schematic diagram of the utility model.
Fig. 4 is the clock processing structure schematic diagram of the utility model.
Fig. 5 is the circuit connection signal for including attenuator, power splitter, radio frequency conditioning filter circuit and power detection module
Figure.
Fig. 6 be include the first frequency mixer, intermediate frequency filtering amplifying circuit, the second frequency mixer and filtered amplitude conditioning amplifying circuit
Circuit connection diagram.
Fig. 7 be include attenuation amplitude conditioning circuit, third frequency mixer, filter amplification circuit, the 4th frequency mixer and AGC electricity tune
The circuit connection diagram of attenuator circuit.
Fig. 8 is the circuit connection diagram of programmable logic device and connector
Specific embodiment
With reference to the accompanying drawing, the utility model is described in detail.
A kind of radio frequency front-end unit for radio comprehensive measurement instrument, such as Fig. 1；There are two types of the radio frequency front-end unit tools
Operating mode, i.e. reception pattern, such as Fig. 2, and as signal source module, such as Fig. 3, illustrate separately below:
In the receiving mode, such as Fig. 5,6,8, after the attenuator F18 decaying that the signal that radio frequency inputs passes through 10dB-10W, into
Enter power splitter；Power splitter exports two signals, one of them is output to power detection module, and power detector N13 is to collecting
Power information be monitored, programmable logic is entered by connector XP2 again after operational amplifier N14A operation amplifier
22,33,27 ports of device D9 carry out logical process；Power splitter exports another signal and successively passes through RF switch D5 switch behaviour
Make, attenuator D4 decaying, filter F9 filtering, amplifier N4 amplification, obtained signal enters the first frequency mixer N3 and fluctuation frequency
Rate is that the local oscillation signal of 1693MHz-2691MHz is mixed, and obtained intermediate-freuqncy signal is carried out by intermediate frequency filtering amplifying circuit
After filter F7, F10 filtering, amplifier N2 amplification, and enter the second frequency mixer N6 and vibration frequency for 1659.9MHz's
Local oscillation signal carries out second and is mixed, and obtains stable intermediate-freuqncy signal；Then, stable intermediate-freuqncy signal is improved by filtered amplitude
Amplifying circuit successively passes through amplifier N7, filter F13, filter F15, amplifier N8, filter F14, filter F16, puts
The intermediate-freuqncy signal amplitude of big device N9, attenuator D3, operational amplifier N5, the radio frequency amplitude conditioning and 30dB that carry out 30dB improve it
Afterwards, the 31.1MHz signal for generating a required amplitude, which is sent to signal-processing board, makees rear class processing；
Under the mode as signal source, such as Fig. 5,7,8, Direct Digital Frequency Synthesizers generate the modulation of a 171MHz
Signal (or external 21.4MHz signal) carries out a fine conditioning, AGC by amplitude of the AGC electricity tune attenuator circuit to signal
It includes by two diodes V4, V5 attenuator formed and filter F34 that electricity, which adjusts attenuator circuit (20dB adjustable extent),；After conditioning
Signal enter the local oscillation signal that third frequency mixer N30 and vibration frequency are 1659.9MHz and carry out first time and be mixed；It is mixed for the first time
Signal after frequency passes through filter amplification circuit filter, is successively filtered in filter F27, filter F29, amplifier N32
Amplification, after filter F26, filter F30, filter F28 filtering, going successively to the 4th frequency mixer N31 with vibration frequency is
The local oscillation signal of 1693MHz-2691MHz is mixed, and 2~1000MHz signal is obtained；2~1000MHz signal is by including two
The attenuation amplitude conditioning circuit of a cascade 30dB attenuator D11, D12 improve the coarse adjustment part of amplitude, after conditioning
Signal enters power splitter after filter F33 filtering；Power splitter exports two signals, one of them is output to power detection mould
Block, power detector N13 are monitored collected power information, and 14, the 15 ports connection operational amplifier N14B of N13 is defeated
The amplitude for the electrically controlled attenuator of AGC feedback control AGC electricity tune attenuator circuit being made of two diodes V4, V5 improves model out
It encloses, programmable logic is entered by connector XP2 after 13,12, the 11 ports connection operational amplifier N14A operation amplifier of N13
22,33,27 ports of device D9 carry out logical process, and programmable logic device D9 uses XC95144, programmable logic device D9
52 port output feedback ontrol attenuator D12 amplitude improve range, programmable logic device D9 53,54,55,56,57,
58, the amplitude of the output feedback ontrol attenuator D11 of 59 ports improves range；Another output of power splitter goes successively to 10dB-
The attenuator F18 of 10W decays, as output access RF interface after decaying；
Wherein, such as Fig. 4, the first local oscillator generator, the second local oscillator generator use HMC830, the production of reference clock generation module
The reference clock of raw 80M is output to clock buffer, and the first output end of clock buffer, second output terminal export clock letter respectively
Number to the first local oscillator generator, the second local oscillator generator, clock buffer third output end is exported to IF board, the 4th output end
40MHz is exported to Direct Digital Frequency Synthesizers；First local oscillator generator generates the sheet that vibration frequency is 1693MHz-2691MHz
Shake signal, and the second local oscillator generator generates the local oscillation signal that vibration frequency is 1659.9MHz；
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Made any modifications, equivalent replacements, and improvements etc., should be included in the utility model within the spirit and principle of utility model
Protection scope within.
Claims (4)
1. a kind of radio frequency front-end unit for radio integration test module, which is characterized in that including the first attenuator, function point
Device, radio frequency improve filter circuit, the first frequency mixer, intermediate frequency filtering amplifying circuit, the second frequency mixer, filtered amplitude conditioning amplification electricity
Road, the first local oscillator generator, reference clock circuit, the second local oscillator generator；The radiofrequency signal inputted by RF interface is successively passed through
After the processing of first attenuator, the power splitter and radio frequency conditioning filter circuit, it is input to first frequency mixer,
First frequency mixer is obtained for the signal of input to be mixed with the local oscillation signal that first local oscillator generator generates
First mixed frequency signal；First mixed frequency signal is input to second frequency mixer, institute after intermediate frequency filtering amplifying circuit processing
The second frequency mixer is stated for the signal of input to be mixed with the local oscillation signal that second local oscillator generator generates, obtains the
Two mixed frequency signals；Second mixed frequency signal exports after filtered amplitude conditioning amplifying circuit processing；Wherein reference clock circuit
Reference clock is provided for first local oscillator generator, second local oscillator generator.
2. the radio frequency front-end unit according to claim 1 for radio integration test module, which is characterized in that also wrap
Include Direct Digital Frequency Synthesizers, attenuation amplitude conditioning circuit, third frequency mixer, filter amplification circuit, the 4th frequency mixer and AGC
Electricity adjusts attenuator circuit；The modulated signal that the Direct Digital Frequency Synthesizers are generated, which exports, gives AGC electricity tune decaying electricity
Road, the modulated signal are input to the third frequency mixer, the third mixing after the AGC electricity tune attenuator circuit is to processing
Device obtains third mixing letter for the signal of input to be mixed with the local oscillation signal that second local oscillator generator generates
Number；Third mixed frequency signal is input to the 4th frequency mixer after filter amplification circuit processing, and the 4th frequency mixer is used
In the signal of input to be mixed with the local oscillation signal that first local oscillator generator generates, the 4th mixed frequency signal is obtained, the
Four mixed frequency signals are exported by the power splitter to first attenuator, institute after attenuation amplitude conditioning circuit processing
State the modulated signal that the first attenuator inputs high quality by the RF interface.
3. the radio frequency front-end unit according to claim 2 for radio integration test module, which is characterized in that also wrap
Power detection module is included, the power detection module includes power detector, operational amplifier and programmable logic device；It is described
Power detector is used to monitor the power information for the radiofrequency signal transmitted in the power splitter, and the power information monitored
It exports to programmable logic device；The power information that the programmable logic device is monitored according to the power detector, instead
Feedback controls the attenuation amplitude of the attenuation amplitude conditioning circuit and the attenuation amplitude of the AGC electricity tune attenuator circuit.
4. the radio frequency front-end unit according to claim 2 for radio integration test module, which is characterized in that described
AGC electricity tune attenuator circuit has a signal input part, for accessing external signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126164.5U CN208939952U (en) | 2018-12-18 | 2018-12-18 | Radio frequency front-end unit for radio integration test module |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822126164.5U CN208939952U (en) | 2018-12-18 | 2018-12-18 | Radio frequency front-end unit for radio integration test module |
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| CN208939952U true CN208939952U (en) | 2019-06-04 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361421A (en) * | 2018-12-18 | 2019-02-19 | 成都前锋电子仪器有限责任公司 | Radio frequency front-end unit for radio integration test module |
| CN110704797A (en) * | 2019-10-29 | 2020-01-17 | 深圳市鼎阳科技有限公司 | Real-time spectrum analyzer, signal processing method and readable storage medium |
-
2018
- 2018-12-18 CN CN201822126164.5U patent/CN208939952U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109361421A (en) * | 2018-12-18 | 2019-02-19 | 成都前锋电子仪器有限责任公司 | Radio frequency front-end unit for radio integration test module |
| CN110704797A (en) * | 2019-10-29 | 2020-01-17 | 深圳市鼎阳科技有限公司 | Real-time spectrum analyzer, signal processing method and readable storage medium |
| CN110704797B (en) * | 2019-10-29 | 2023-01-31 | 深圳市鼎阳科技股份有限公司 | Real-time spectrum analyzer, signal processing method and readable storage medium |
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