CN103647575B - 2-12GHz broadband microwave front-end circuit and 2-12GHz microwave signal receiving method - Google Patents
2-12GHz broadband microwave front-end circuit and 2-12GHz microwave signal receiving method Download PDFInfo
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- CN103647575B CN103647575B CN201310706255.5A CN201310706255A CN103647575B CN 103647575 B CN103647575 B CN 103647575B CN 201310706255 A CN201310706255 A CN 201310706255A CN 103647575 B CN103647575 B CN 103647575B
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Abstract
The invention provides a 2-12GHz broadband microwave front-end circuit and a 2-12GHz microwave signal receiving method. The front-end circuit comprises a channel module and a local oscillator module. The local oscillator module is connected with the channel module and provides local oscillator signals for the channel module. The channel module comprises an amplitude limiting module, a low-noise amplification module, a switch filtering module, a primary frequency mixing module, a filtering amplification module, a secondary frequency mixing module and a medium frequency filtering amplification module. The local oscillator module comprises a crystal oscillator circuit module, a first local oscillator module, a second local oscillator module and a clock module. The first local oscillator module, the second local oscillator module and the clock module are respectively connected with the crystal oscillator circuit module, the crystal oscillator circuit module amplifies crystal oscillator signals output by a crystal oscillator and divides the crystal oscillator signals into three ways, and the crystal oscillator signals are respectively output to the first local oscillator module, the second local oscillator module and the clock module to serve as reference signals. The first local oscillator module is connected with the primary frequency mixing module and provides local oscillator signals for the primary frequency mixing module; and the second local oscillator module is connected with the secondary frequency mixing module and provides local oscillator signals for the secondary frequency mixing module.
Description
Technical field
The present invention relates to technical field of micro communication, especially microwave transmitting and receiving circuit field, be specifically related to a kind of 2 ~ 12GHz wide-band microwave front-end circuit and 2 ~ 12GHz microwave signal method of reseptance.
Background technology
In recent years, along with the development of microwave integrated circuit technology and Micro-package technique, electronic system mainly considers miniaturization, modularization, standardization in design, to meet product high-performance, the requirement that highly reliable, Large Copacity, little Bao are light.Especially airborne harsh especially to the requirement of equipment size, weight with Space-borne.Therefore require that microwave receiving front end is little, lightweight to broadband, volume, the development of high-performance, miniaturization.The present invention furthers investigate mainly for the miniaturized microwave receiving front end of certain high accuracy quick location technique, microwave assembly technology and integrated chip technology is adopted to achieve microwave receiving front end Miniaturization Design, efficiently reduce the volume of system and alleviate weight of equipment, meeting actual requirement of engineering.
The design of traditional microwave front-end adopts single parts integration mode substantially, and this method is that some microwave section, assembly are had certain function receiving front-end with cable on-link mode (OLM) composition.This implementation has the advantages such as performance index are better, Installation and Debugging are convenient, but whole microwave front-end volume is comparatively large, and equipment comparatively weight, is only suitable for the platform that some are vehicle-mounted, laboratory equal-volume, weight demands are not high, has certain limitation.And comparatively harsh to volume, weight demands at unmanned plane, the platform such as spaceborne, microwave front-end then will adopt microwave assembly technology and integrated chip technology, realizes the miniaturization of system, and volume, weight have obvious advantage compared with parts integration mode.
Summary of the invention
The defect existed for prior art or deficiency, object of the present invention aims to provide a kind of 2 ~ 12GHz wide-band microwave front-end circuit and 2 ~ 12GHz microwave signal method of reseptance, utilize 2 ~ 12GHz wide-band microwave front-end circuit of the present invention and 2 ~ 12GHz microwave signal method of reseptance, be applicable to detection equipment, equipment all has larger performance boost in volume, weight, power consumption, meets demand equipment volume, weight and high-performance being stablized to transmitting-receiving.
For achieving the above object, the technical solution adopted in the present invention is as follows:
A kind of 2 ~ 12GHz wide-band microwave front-end circuit, comprise channel module and local oscillator module, local oscillator module is connected with channel module, for it provides local oscillation signal, wherein:
Described channel module comprises clipping module, low noise amplification module, switch filtering module, first order frequency mixing module, filter and amplification module, second level frequency mixing module and intermediate frequency filtering amplification module, wherein: clipping module is for receiving by 2 ~ 12GHz input signal of antenna intercepting and capturing and carrying out amplitude limiting processing and output; The input of low noise amplification module is connected to the output of clipping module, amplifies process for providing signal; The input of switch filtering module is connected with the output of low noise amplification module, for choosing the frequency band signals matched with this switch filtering module median filter; The radio-frequency head of first order frequency mixing module is connected to the output of switch filtering module, its local oscillator input receives the first local oscillation signal from described local oscillator module input, and this first order frequency mixing module is used for the signal inputted by its radio-frequency head conversion to obtain an intermediate-freuqncy signal; The input of filter and amplification module is connected with the output of first order frequency mixing module, the intermediate-freuqncy signal that described first order frequency mixing module exports is carried out to filtering and is amplified process, and outputs signal to second level frequency mixing module; The radio-frequency head of second level frequency mixing module is connected to the output of filter and amplification module, its local oscillator input receives the second local oscillation signal from described local oscillator module input, and this second level frequency mixing module is used for the intermediate-freuqncy signal signal inputted by its radio-frequency head conversion being obtained 340 ± 25MHz and 400 ± 350MHz; The input of intermediate frequency filtering amplification module is connected to the output of described second level frequency mixing module, for the intermediate-freuqncy signal of second level frequency mixing module output 340 ± 25MHz and 400 ± 350MHz being carried out intermediate frequency filtering and exporting signal processor to after amplifying process;
Described local oscillator module comprises crystal oscillating circuit module, the first local oscillator module, the second local oscillator module, clock module, first local oscillator module, the second local oscillator module, clock module respectively with crystal oscillating circuit model calling, after the 100MHz signal that crystal oscillator exports by crystal oscillating circuit module amplifies, merit is divided into three tunnels, output to the first local oscillator module, the second local oscillator module and clock module respectively, as the reference signal of the first local oscillator module, the second local oscillator module and clock module; First local oscillator module is connected with the first order frequency mixing module of described channel module, for this first order frequency mixing module provides local oscillation signal; Second local oscillator module is connected with second level frequency mixing module, for this second level frequency mixing module provides local oscillation signal.
In further execution mode, described first local oscillator module produces the first local oscillation signal that frequency is 10 ~ 15GHz, and described second local oscillator module produces the second local oscillation signal that frequency is 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz
In further execution mode, described connect successively clipping module, low noise amplification module, switch filtering module, first order frequency mixing module, filter and amplification module, between second level frequency mixing module and intermediate frequency filtering amplification module all by circuit board 50 Ω line connect, described first local oscillator module, the second local oscillator module, clock module are respectively by circuit board 50 Ω line and crystal oscillating circuit model calling.
In further execution mode, described switch filtering module is made up of two hilted broadsword five throw switches and five filters, and described five filters are connected between two hilted broadsword five throw switches and form five bypass passages, input signal are received frequency range and are divided into five sections.
In further execution mode, described filter and amplification module is made up of a second switch filtration module and amplifier, the input of second switch filtration module is connected with the output of described first order frequency mixing module, the input of amplifier is connected with the output of second switch filtration module and its output is connected with the radio-frequency head of second level frequency mixing module, wherein, second switch filtration module is made up of two hilted broadsword four throw switches and four filters, and four filters are connected between two hilted broadsword four throw switches and form four bypass passages.
In further execution mode, intermediate frequency filtering amplification module is by a 3rd switch filtering module, second amplifier and the 4th switch filtering module composition, the input of the 3rd switch filtering module is connected to the output of described second level frequency mixing module, the input of the second amplifier is connected to the output of the 3rd switch filtering module, the input of the 4th switch filtering module is connected to the output of the second amplifier, wherein, 3rd switch filtering module and the 4th switch filtering module are by two single-pole double-throw switch (SPDT)s and two filter compositions, two filters are connected between two single-pole double-throw switch (SPDT)s and form two bypass passages.
In further execution mode, described clipping module, low noise amplification module, switch filtering module, filter and amplification module, second level frequency mixing module and intermediate frequency filtering amplification module all select chip device, and described first order frequency mixing module, crystal oscillating circuit module, the first local oscillator module, the second local oscillator module and clock module all use surface mount device.
According to improvement of the present invention, also propose a kind of 2 ~ 12GHz microwave signal method of reseptance utilizing above-mentioned 2 ~ 12GHz wide-band microwave front-end circuit to realize, the method comprises the following steps:
Step 1, receive 2 ~ 12GHz input signal that an antenna intercepts and captures, and amplitude limiting processing is carried out to it;
Step 2, low noise amplification process is carried out to the signal after amplitude limiting processing;
Step 3, switch filtering is carried out to the signal after low noise amplification process, the frequency band signals that selecting filter matches;
Step 4, utilize one first local oscillation signal to carry out Frequency mixing processing to the signal that step 3 selects, obtain the first intermediate-freuqncy signal;
Step 5, the first intermediate-freuqncy signal obtained step 4 mixing are carried out filtering and are amplified process;
Step 6, utilize one second local oscillation signal to carry out Frequency mixing processing to the intermediate-freuqncy signal that step 5 obtains, obtain the second intermediate-freuqncy signal;
Step 7, the second intermediate-freuqncy signal obtained step 6 are carried out intermediate frequency filtering and are amplified process; And
Step 8, intermediate-freuqncy signal step 7 obtained export a signal processor to.
In further execution mode, in described method, the first local oscillation signal is the local oscillation signal of frequency range at 10 ~ 15GHz, the local oscillation signal of the second local oscillation signal to be frequency be 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz.
From the above technical solution of the present invention shows that, compared with prior art, remarkable advantage of the present invention is: 1) between each functional module, major part is connected by 50 Ω lines, and noise factor and intermediate frequency export flatness index and significantly improve; 2) volume is less, weight is lighter, power consumption is lower; 3) meeting that volume is less, weight is lighter, under the lower prerequisite of power consumption, can realize high performance stable transmitting-receiving microwave signal.
Accompanying drawing explanation
Fig. 1 is the circuit structure diagram of an embodiment of the present invention 2 ~ 12GHz wide-band microwave front-end circuit.
Fig. 2 is an exemplary circuit configuration figure of channel module in Fig. 1 execution mode.
Fig. 3 is an exemplary circuit configuration figure of local oscillator module in Fig. 1 execution mode.
Fig. 4 is the realization flow schematic diagram of an embodiment of the present invention 2 ~ 12GHz microwave signal method of reseptance.
Embodiment
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
Below in conjunction with appended diagram and embodiment, describe enforcement of the present invention in detail.
Fig. 1 is the circuit structure of an embodiment of the present invention 2 ~ 12GHz wide-band microwave front-end circuit, and wherein, a kind of 2 ~ 12GHz wide-band microwave front-end circuit, comprise channel module and local oscillator module, local oscillator module is connected with channel module, for it provides local oscillation signal.
Shown in composition graphs 2, channel module comprises clipping module 1, low noise amplification module 2, switch filtering module 3, first order frequency mixing module 4, filter and amplification module 5, second level frequency mixing module 6 and intermediate frequency filtering amplification module 7.
Clipping module 1 is for receiving by 2 ~ 12GHz input signal (power-75 ~-35dBm) of antenna intercepting and capturing and carrying out amplitude limiting processing and output.In the present embodiment, the dangerous situation that may cause burning rear class low noise amplifier when input signal first can prevent antenna from receiving high-power signal by clipping module occurs.
The input of low noise amplification module 2 is connected to the output of clipping module 1, amplifies process for providing signal.
The input of switch filtering module 3 is connected with the output of low noise amplification module 2, for choosing the frequency band signals matched with this switch filtering module 3 median filter.
As shown in Figure 2, as preferred embodiment, described switch filtering module 3 is made up of two hilted broadsword five throw switches (SP5T) and five filters, and described five filters are connected between two hilted broadsword five throw switches and form five bypass passages, input signal are received frequency range and are divided into five sections.Signal is made to enter the radio-frequency head of first order frequency mixer 4 by the filter of this frequency range by switching over.
The radio-frequency head of first order frequency mixing module 4 is connected to the output of switch filtering module 3, its local oscillator input receives the first local oscillation signal from described local oscillator module input, and this first order frequency mixing module 4 is for obtaining an intermediate-freuqncy signal by the signal inputted by its radio-frequency head conversion.Wherein:
When input signal is 2 ~ 7GHz, the first local oscillation signal is input as 10 ~ 15GHz, and intermediate-freuqncy signal exports as 8GHz ± 25MHz or 8GHz ± 350MHz.
When input signal is 7 ~ 12GHz, the first local oscillation signal is input as 10 ~ 15GHz, and IF output signal is 3GHz ± 25MHz or 3GHz ± 350MHz.
The input of filter and amplification module 5 is connected with the output of first order frequency mixing module 4, the intermediate-freuqncy signal that described first order frequency mixing module 4 exports is carried out to filtering and is amplified process, and outputs signal to second level frequency mixing module 6.
As shown in Figure 2, as preferred embodiment, described filter and amplification module 5 is made up of a second switch filtration module 5a and amplifier 5b, the input of second switch filtration module 5a is connected with the output of described first order frequency mixing module 4, the input of amplifier 5b is connected with the output of second switch filtration module 5a and its output is connected with the radio-frequency head of second level frequency mixing module 6, wherein, second switch filtration module 5a is made up of two hilted broadsword four throw switches (SP4T) and four filters, four filters are connected between two hilted broadsword four throw switches and form four bypass passages.Signal is made to enter the radio-frequency head of second level frequency mixer 6 by the filter of this frequency range by switching over.
The radio-frequency head of second level frequency mixing module 6 is connected to the output of filter and amplification module 5, its local oscillator input receives the second local oscillation signal from described local oscillator module input, and this second level frequency mixing module 6 is for obtaining the intermediate-freuqncy signal of 340 ± 25MHz and 400 ± 350MHz by the signal inputted by its radio-frequency head conversion.Wherein:
During the second local oscillation signal input 7.66GHz or 3.34GHz, output intermediate-freuqncy signal is 340 ± 25MHz.
During the second local oscillation signal input 7.6GHz or 3.4GHz, output intermediate-freuqncy signal is 400 ± 350MHz.
As shown in Figure 2, the input of intermediate frequency filtering amplification module 7 is connected to the output of described second level frequency mixing module 6, for the intermediate-freuqncy signal of second level frequency mixing module 6 output 340 ± 25MHz and 400 ± 350MHz being carried out intermediate frequency filtering and exporting signal processor to after amplifying process.
As shown in Figure 2, as preferred embodiment, intermediate frequency filtering amplification module 7 is by a 3rd switch filtering module 7a, second amplifier 7b and the 4th switch filtering module 7c forms, the input of the 3rd switch filtering module 7a is connected to the output of described second level frequency mixing module 6, the input of the second amplifier 7b is connected to the output of the 3rd switch filtering module 7a, the input of the 4th switch filtering module 7c is connected to the output of the second amplifier 7b, wherein, 3rd switch filtering module 7a and the 4th switch filtering module 7c is by two single-pole double-throw switch (SPDT)s (SP2T) and two filter compositions, two filters are connected between two single-pole double-throw switch (SPDT)s and form two bypass passages.Signal is made to export signal processor to by the filter of this frequency range by switching over.
Fig. 3 is an exemplary circuit configuration figure of local oscillator module in Fig. 1 execution mode, wherein, local oscillator module comprises crystal oscillating circuit module 8, first local oscillator module 9, second local oscillator module 10, clock module 11, first local oscillator module 9, second local oscillator module 10, clock module 11 is connected with crystal oscillating circuit module 8 respectively, after the 100MHz signal that crystal oscillator exports by crystal oscillating circuit module 8 amplifies, merit is divided into three tunnels, output to the first local oscillator module 9 respectively, second local oscillator module 10 and clock module 11, as the first local oscillator module 9, the reference signal of the second local oscillator module 10 and clock module 11.First local oscillator module 9 is connected with the first order frequency mixing module 4 of described channel module, for this first order frequency mixing module provides local oscillation signal; Second local oscillator module 10 is connected with second level frequency mixing module 6, for this second level frequency mixing module 6 provides local oscillation signal.
Described first local oscillator module 9 produces the first local oscillation signal that frequency is 10 ~ 15GHz, and described second local oscillator module 10 produces the second local oscillation signal that frequency is 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz.
Particularly, as shown in Figure 3, after the 100MHz signal that crystal oscillator exports by crystal oscillating circuit module 8 amplifies, merit is divided into three tunnels, outputs to the first local oscillator module 9, second local oscillator module 10, clock module 11 respectively as reference signal.
First local oscillator module 9 produces the local oscillation signal that frequency is 10 ~ 15GHz, physical circuit adopts phase-lock mode, select from ADF4106 phase discriminator chip, the signal of VCO coupling compares respectively through ADF4106 chip internal Fractional-N frequency device and the laggard line phase of R frequency divider with the signal exported with reference to crystal oscillator, the phase error voltage produced is the tuning end Vt of control VCO after loop filtering amplifies, again by serial code control N, R frequency divider, the signal of 5 ~ 7.5GHz of stable output is got final product during locking, 5 ~ 7.5GHz is carried out 2 frequencys multiplication, through switch filtering, the signal of 10 ~ 15GHz is obtained after amplifying.
Second local oscillator module 10 is generation frequencies is the local oscillation signal of 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz.Physical circuit is also adopt phase-lock mode, phase locked source exports the signal of 3.83GHz, 3.8GHz, 3.34GHz and 3.4GHz tetra-points, 3.83GHz and 3.8GHz signal to carry out after 2 frequencys multiplication after filtering, amplify after obtain 7.66GHz and 7.6GHz signal, 3.34GHz and 3.4GHz signal directly exports through switching gate.
Clock module 11 is that the clock signal producing 150MHz exports, and physical circuit adopts frequency division, frequency multiplication mode, and 100MHz signal frequency split output 50MHz signal carries out saturation amplification again and gets harmonic wave 150MHz signal, and carry out power amplification again after filtering, final filtering exports.
As preferred embodiment, described connect successively clipping module 1, low noise amplification module 2, switch filtering module 3, first order frequency mixing module 4, filter and amplification module 5, between second level frequency mixing module 6 and intermediate frequency filtering amplification module 7 all by circuit board 50 Ω line connect, described first local oscillator module 9, second local oscillator module 10, clock module 11 are connected with crystal oscillating circuit module 8 respectively by circuit board 50 Ω line.
For realizing the designing requirement of miniaturized and high reliability, in the present embodiment, described clipping module 1, low noise amplification module 2, switch filtering module 3, filter and amplification module 5, second level frequency mixing module 6 and intermediate frequency filtering amplification module 7 all select chip device, described first order frequency mixing module 4, crystal oscillating circuit module 8, local oscillator module 9, two local oscillator module 10 and clock module 11 all use surface mount device, and the 2 ~ 12GHz wide-band microwave front-end circuit be therefore assembled into has the advantages such as high sensitivity, volume are little, lightweight, high-performance.
As preferred embodiment, in the embodiment shown in Fig. 2, clipping module 1 adopts NC1803C-218 chip; Low noise amplifier 2 adopts CHA3218-99F and FM3058 two amplifier cascades to be formed, and each SP5T switch in switch filtering module 5 is made up of HMC641 switch and HMC347 switch, and MEMS filter selected by filter wherein; First order frequency mixer 4 adopts M2H-0220LE filter; Each SP4T in filter and amplification module 5 is made up of 2 HMC641 switches, and amplifier 5b adopts HMC462 amplifier; Second level frequency mixer 6 adopts NC1708C-308 chip; In intermediate frequency filtering amplification module 7, SP2T adopts HMC347 switch, and filter is LC filter 2FL750/B340-50, and the second amplifier 7b adopts MAAM02350 amplifier.
As preferred embodiment, in the embodiment shown in Fig. 3, the 100MHz crystal resonator in crystal oscillating circuit module 8 adopts PFTC13-0008 crystal oscillator, and amplifier adopts H1C51188A amplifier, and power splitter adopts ADP-2-20 power splitter.
In first local oscillator module 9, VCO adopts HMC587LP4 voltage controlled oscillator, and the model that phase discriminator adopts is ADF4108BCPZ, and the model that frequency multiplier adopts is AMMC-6120, and filter is MEMS filter, and SP3T switch is wherein HMC641 switch.
In second local oscillator module 10, VCO adopts HEV0360N voltage controlled oscillator, and the model that phase discriminator adopts is ADF4106BRU, the model that frequency multiplier adopts is AMMC-6120, filter BWLF-3.5, SP2T switch is wherein HMC637 switch, and last amplifier is HMC462.
In clock module 11, frequency divider adopts HMC361S8G, and two amplifiers are respectively NBB500, NBB300, and filter is LC filter.
Figure 4 shows that the realization flow of the 2 ~ 12GHz microwave signal method of reseptance utilizing above-mentioned 2 ~ 12GHz wide-band microwave front-end circuit to realize, wherein, 2 ~ 12GHz microwave signal method of reseptance comprises the following steps:
Step 1, receive 2 ~ 12GHz input signal that an antenna intercepts and captures, and amplitude limiting processing is carried out to it;
Step 2, low noise amplification process is carried out to the signal after amplitude limiting processing;
Step 3, switch filtering is carried out to the signal after low noise amplification process, the frequency band signals that selecting filter matches;
Step 4, utilize one first local oscillation signal to carry out Frequency mixing processing to the signal that step 3 selects, obtain the first intermediate-freuqncy signal;
Step 5, the first intermediate-freuqncy signal obtained step 4 mixing are carried out filtering and are amplified process;
Step 6, utilize one second local oscillation signal to carry out Frequency mixing processing to the intermediate-freuqncy signal that step 5 obtains, obtain the second intermediate-freuqncy signal;
Step 7, the second intermediate-freuqncy signal obtained step 6 are carried out intermediate frequency filtering and are amplified process; And
Step 8, intermediate-freuqncy signal step 7 obtained export a signal processor to.
In described method, the first local oscillation signal is the local oscillation signal of frequency range at 10 ~ 15GHz, the local oscillation signal of the second local oscillation signal to be frequency be 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz.
The signal transacting that above-mentioned steps 1-step 8 is carried out, is illustrated as shown in Figure 1-Figure 3.
In sum, 2 ~ 12GHz wide-band microwave front-end circuit provided by the invention and 2 ~ 12GHz microwave signal method of reseptance, be applicable on the detection equipment of kinds of platform lift-launch, its platform device all has larger performance boost in volume, weight, power consumption, meets demand equipment volume, weight and high-performance being stablized to transmitting-receiving.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (7)
1. 2 ~ 12GHz wide-band microwave front-end circuit, is characterized in that, comprise channel module and local oscillator module, local oscillator module is connected with channel module, for it provides local oscillation signal, wherein:
Described channel module comprises clipping module (1), low noise amplification module (2), switch filtering module (3), first order frequency mixing module (4), filter and amplification module (5), second level frequency mixing module (6) and intermediate frequency filtering amplification module (7), wherein: clipping module (1) is for receiving by 2 ~ 12GHz input signal of antenna intercepting and capturing and carrying out amplitude limiting processing and output; The input of low noise amplification module (2) is connected to the output of clipping module (1), amplifies process for providing signal; The input of switch filtering module (3) is connected with the output of low noise amplification module (2), for choosing the frequency band signals matched with this switch filtering module (3) median filter; The radio-frequency head of first order frequency mixing module (4) is connected to the output of switch filtering module (3), its local oscillator input receives the first local oscillation signal from described local oscillator module input, and this first order frequency mixing module (4) is for obtaining an intermediate-freuqncy signal by the signal inputted by its radio-frequency head conversion; The input of filter and amplification module (5) is connected with the output of first order frequency mixing module (4), the intermediate-freuqncy signal that described first order frequency mixing module (4) exports is carried out to filtering and amplified process, and outputs signal to second level frequency mixing module (6); The radio-frequency head of second level frequency mixing module (6) is connected to the output of filter and amplification module (5), its local oscillator input receives the second local oscillation signal from described local oscillator module input, and this second level frequency mixing module (6) is for obtaining the intermediate-freuqncy signal of 340 ± 25MHz and 400 ± 350MHz by the signal inputted by its radio-frequency head conversion; The input of intermediate frequency filtering amplification module (7) is connected to the output of described second level frequency mixing module (6), for the intermediate-freuqncy signal of second level frequency mixing module (6) output 340 ± 25MHz and 400 ± 350MHz being carried out intermediate frequency filtering and exporting signal processor to after amplifying process;
Described local oscillator module comprises crystal oscillating circuit module (8), first local oscillator module (9), second local oscillator module (10), clock module (11), first local oscillator module (9), second local oscillator module (10), clock module (11) is connected with crystal oscillating circuit module (8) respectively, after the 100MHz signal that crystal oscillator exports by crystal oscillating circuit module (8) amplifies, merit is divided into three tunnels, output to the first local oscillator module (9) respectively, second local oscillator module (10) and clock module (11), as the first local oscillator module (9), the reference signal of the second local oscillator module (10) and clock module (11), first local oscillator module (9) is connected with the first order frequency mixing module (4) of described channel module, for this first order frequency mixing module provides local oscillation signal, second local oscillator module (10) is connected with second level frequency mixing module (6), for this second level frequency mixing module (6) provides local oscillation signal,
Described first local oscillator module (9) produces the first local oscillation signal that frequency is 10 ~ 15GHz, and described second local oscillator module (10) produces the second local oscillation signal that frequency is 7.66GHz, 7.6GHz, 3.34GHz and 3.4GHz.
2. 2 ~ 12GHz wide-band microwave front-end circuit according to claim 1, it is characterized in that, the described clipping module (1) connected successively, low noise amplification module (2), switch filtering module (3), first order frequency mixing module (4), filter and amplification module (5), all connected by circuit board 50 Ω line between second level frequency mixing module (6) and intermediate frequency filtering amplification module (7), described first local oscillator module (9), second local oscillator module (10), clock module (11) is connected with crystal oscillating circuit module (8) respectively by circuit board 50 Ω line.
3. 2 ~ 12GHz wide-band microwave front-end circuit according to claim 1, it is characterized in that, described switch filtering module (3) is made up of two hilted broadsword five throw switches and five filters, described five filters are connected between two hilted broadsword five throw switches and form five bypass passages, input signal are received frequency range and are divided into five sections.
4. 2 ~ 12GHz wide-band microwave front-end circuit according to claim 1, it is characterized in that, described filter and amplification module (5) is made up of a second switch filtration module (5a) and amplifier (5b), the input of second switch filtration module (5a) is connected with the output of described first order frequency mixing module (4), the input of amplifier (5b) is connected with the output of second switch filtration module (5a) and its output is connected with the radio-frequency head of second level frequency mixing module (6), wherein, second switch filtration module (5a) is made up of two hilted broadsword four throw switches and four filters, four filters are connected between two hilted broadsword four throw switches and form four bypass passages.
5. 2 ~ 12GHz wide-band microwave front-end circuit according to claim 1, it is characterized in that, intermediate frequency filtering amplification module (7) is by a 3rd switch filtering module (7a), second amplifier (7b) and the 4th switch filtering module (7c) composition, the input of the 3rd switch filtering module (7a) is connected to the output of described second level frequency mixing module (6), the input of the second amplifier (7b) is connected to the output of the 3rd switch filtering module (7a), the input of the 4th switch filtering module (7c) is connected to the output of the second amplifier (7b), wherein, 3rd switch filtering module (7a) and the 4th switch filtering module (7c) are by two single-pole double-throw switch (SPDT)s and two filter compositions, two filters are connected between two single-pole double-throw switch (SPDT)s and form two bypass passages.
6. 2 ~ 12GHz wide-band microwave front-end circuit according to claim 1, it is characterized in that, described clipping module (1), low noise amplification module (2), switch filtering module (3), filter and amplification module (5), second level frequency mixing module (6) and intermediate frequency filtering amplification module (7) all select chip device, and described first order frequency mixing module (4), crystal oscillating circuit module (8), the first local oscillator module (9), the second local oscillator module (10) and clock module (11) all use surface mount device.
7. utilize 2 ~ 12GHz microwave signal method of reseptance that the 2 ~ 12GHz wide-band microwave front-end circuit described in claim 1 realizes, it is characterized in that, the method comprises the following steps:
Step 1, receive 2 ~ 12GHz input signal that an antenna intercepts and captures, and amplitude limiting processing is carried out to it;
Step 2, low noise amplification process is carried out to the signal after amplitude limiting processing;
Step 3, switch filtering is carried out to the signal after low noise amplification process, the frequency band signals that selecting filter matches;
Step 4, utilize the first local oscillation signal to carry out Frequency mixing processing to the signal that step 3 selects, obtain the first intermediate-freuqncy signal;
Step 5, the first intermediate-freuqncy signal obtained step 4 mixing are carried out filtering and are amplified process;
Step 6, utilize the second local oscillation signal to carry out Frequency mixing processing to the intermediate-freuqncy signal that step 5 obtains, obtain the second intermediate-freuqncy signal;
Step 7, the second intermediate-freuqncy signal obtained step 6 are carried out intermediate frequency filtering and are amplified process;
Step 8, intermediate-freuqncy signal step 7 obtained export a signal processor to.
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|---|---|---|---|---|
| KR20170004735A (en) * | 2015-07-03 | 2017-01-11 | 삼성전자주식회사 | Electronic apparatus and receiving method thereof |
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