CN110426699A - A kind of front end system and preparation method thereof of plate two-band detector - Google Patents
A kind of front end system and preparation method thereof of plate two-band detector Download PDFInfo
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- CN110426699A CN110426699A CN201910699625.4A CN201910699625A CN110426699A CN 110426699 A CN110426699 A CN 110426699A CN 201910699625 A CN201910699625 A CN 201910699625A CN 110426699 A CN110426699 A CN 110426699A
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
- G01S13/02—Systems using reflection of radio waves, e.g. primary radar systems; Analogous systems
- G01S13/06—Systems determining position data of a target
- G01S13/08—Systems for measuring distance only
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
Abstract
The present invention provides a kind of front end system of plate two-band detector, including shell, it includes cavity and its surface groove is embedded with K-band antenna and F wave band antenna, and inside cavity accommodates signal-processing board, K-band rf board, F waveband radio frequency plate, K-band IF board and F wave band IF board；K-band antenna, K-band rf board, K-band IF board and signal-processing board are sequentially connected electrically, and F wave band antenna, F waveband radio frequency plate, F wave band IF board and the signal-processing board are sequentially connected electrically, and signal-processing board is connect with row's adapter.The present invention also provides its production methods.The front end system of detector of the invention realizes K frequency range and F-band collaboration detection using K-band antenna and F wave band antenna, anti-interference detection may be implemented, and intermediate frequency is carried out using IF board and is filtered out, it can detect and differentiate 8-12m apart from Small object, blind view is selected for the distant object other than 20m, i.e., intermediate frequency is carried out to the echo signal greater than 20m and filtered out.
Description
Technical field
The invention belongs to electronic technology fields, and in particular to a kind of front end system and its system of plate two-band detector
Make method.
Background technique
Millimeter wave detector becomes modern wireless air and ground object detection avoidance due to its stronger anti-misty rain interference performance
One of technical way.It also will receive various active interference in use.Conventional jammer (has interference source
Equipment) generally produce the interference of the low-frequency ranges such as C, X-band.Since frequency electromagnetic waves are decayed rapidly in air, need higher
Transmission power with size objectives could interfere with intensity to same distance.
The prior art is about K-band car radar existing research, since vehicle target is bigger, scattering resonance state (RCS)
Greater than 1m2, so radar mainly detects the preceding big target into 30-70 degree.Traffic environment interference usually by algorithm come
Inhibited.For F wave band since frequency is higher, development difficulty is big, not yet commercial at this stage, since frequency is higher, interference source cost
Expensive, manufacture difficulty is big, so there is not yet the commercial interference source of F wave band, therefore F wave band is selected to have centainly as detector
Anti-interference advantage.
For small target detection, whichever frequency range, the radar of single frequency band is easy the interference by active interference source.Have
Necessity carries out the exploitation of multiband transmitting-receiving subassembly, to reach preferable anti-jamming effectiveness.For example, the milli of single millimeter wave frequency band
Metric wave detector often is faced with a variety of interference in use, causes detector failure or precision to be affected, therefore having must
Anti-interference Design is carried out for interference electromagnetic wave, to improve detector detection recognition capability.
Current anti-interference machine (i.e. anti-interference detection device) has the disadvantages that
1) anti-interference machine uses single frequency point, and frequency is lower, and current perturbation technique is for interference search gear progress
Normal detection, the considerations of for integration complexity and cost, the electromagnetic wave often issued using single frequency point interference source is to spy
It surveys device to be interfered, often only needs corresponding frequency point, interference effect can be reached using certain power emission.Therefore, using list
The anti-interference machine of one frequency point is easy by external interference.
For example, application No. is 201310028067.1 patent documents to propose a kind of 2.4GHz frequency range anti-interference method, and
A kind of anti-interference machine is described wherein.The anti-interference machine utilizes the cyclostationarity of signal, is filtered using adaptive frequency shifting
Inhibit interference signal frequency spectrum, and extract useful signal, reduces the bit error rate.However, since the anti-interference machine is to use single frequency point,
And frequency is lower, therefore is easy by external interference.
2) for circuit and the consideration of antenna structure electrical property design, shape when conventional millimeter wave detector is due to exploitation
Different, if shape is designed as irregular or rugged, conformal poor with shell, concealment is poor.If millimeter wave is visited
It surveys device and is designed as planar structure, be then easier to conformal with aircraft surface, good concealment, air drag is small, is mainly used for laterally visiting
It surveys.And the conventional millimeter wave detector based on on-chip antenna is chiefly used in forward detection, wave beam although antenna surface is plane
Visual angle is generally less than 60 degree, is ball-type or elliposoidal wave beam, causes antenna covering investigative range small, laterally detect 360 degree of panoramas
It needs more antennas to detect, increases cost and process complexity, and lobin is poor, can not achieve wide viewing angle detection.
3) conventional probes mostly do not have the blind visual function of overall background target selectivity, in target and the earth patterning,
(it is greater than 5m since the RCS of earth target is very big2), and plane-hop target RCS is small, is easy to generate mistake to close-in target
Report, influences actual detection accuracy.
Application No. is 201310611790.2 patent document disclose a kind of Space-frequency joint anti-interference implementation and
A kind of anti-interference machine is wherein described, which uses the broadband FFT dividing method, and broadband signal is divided into multiple narrowbands
Signal realizes multiple FFT transform in short data using sliding window method, and covariance matrix calculates between realizing each frequency point signal, uses
Linearly constrained minimum variance acquires the filter weights of each narrow band signal respectively, finally uses the side of two paths of data alternative splicing
Formula obtains 1 circuit-switched data, and flexibility ratio is high, but the hardware of the either anti-interference machine or software process are all more complicated, cost
Height does not have the blind visual function of overall background target selectivity.
Summary of the invention
The purpose of the present invention is to provide a kind of front end systems and preparation method thereof of plate two-band detector, with reality
Existing anti-interference detection, and blind view is selected to distant object.
To achieve the goals above, the present invention provides a kind of front end systems of plate two-band detector, including shell
Body, the shell are slab construction comprising cavity and its surface groove is embedded with K-band antenna and F wave band antenna, the cavity
Inner containment has signal-processing board, K-band rf board, F waveband radio frequency plate, K-band IF board and F wave band IF board；The K wave
Section antenna, K-band rf board, K-band IF board and the signal-processing board are sequentially connected electrically, F wave band antenna, F waveband radio frequency
Plate, F wave band IF board and the signal-processing board are sequentially connected electrically, and signal-processing board is connect with row's adapter.
The quantity of the cavity of the shell is 3, and the K-band radio frequency cavity including accommodating the K-band rf board holds
Receive the F waveband radio frequency plate F waveband radio frequency cavity and accommodate the signal-processing board, K-band IF board and F wave band
The IF signal processing cavity of IF board.
Between the K-band radio frequency cavity and IF signal processing cavity and at F waveband radio frequency cavity and intermediate-freuqncy signal
It is separated respectively by a partition room between reason cavity, the material of partition is metal simple-substance or alloy, and the K-band radio frequency cavity
With in F waveband radio frequency cavity be equipped with radio frequency absorbing material.
The opening of the cavity of the shell is closed by a metal cover board.
It is each logical between the K-band antenna and K-band rf board and between the F wave band antenna and F waveband radio frequency plate
It crosses one group of glass insulator to be connected with feed pin, between the K-band rf board and K-band IF board and the F wave band is penetrated
It is electrically connected between frequency plate and F wave band IF board by the row's needle connector being inserted on the partition, and the K-band IF board
It is connected respectively with the signal-processing board by a shielded lead with F wave band IF board.
The signal-processing board, K-band rf board, F waveband radio frequency plate, K-band IF board, F wave band IF board and described
Row's needle connector, shielded lead are coplanar with.
The K-band antenna and F wave band antenna are single slot antenna that leans forward.
The electric switch using electric signal control is equipped in the signal-processing board.
The quantity of the K-band antenna and the F wave band antenna is 2, and K-band rf board and F waveband radio frequency plate are equal
It is connected including the signal source being sequentially connected corresponding with K-band, voltage controlled oscillator and function point, and with two branches that the function is divided to
Transmitting branch and receiving branch, the transmitting branch is sequentially connected wherein the one of the first low-noise amplifier and K-band antenna
It is a or F wave band antenna one of them, the receiving branch is sequentially connected frequency mixer, the second low-noise amplifier and K-band day
Another in another or F wave band antenna in line.
The K-band IF board and F wave band IF board include the triangle wave generating circuit being sequentially connected, filter module and
Amplifying circuit, the output frequency of triangle wave generating circuit is 30kHz and output bandwidth is 200kHz-2.5MHz.
On the other hand, the present invention provides a kind of production method of the front end system of plate two-band detector, comprising:
S1: one shell of production；
S2: one K-band rf board of production, a F waveband radio frequency plate, a K-band IF board and a F wave band IF board；
S3: 2 K-band antennas and 2 F wave band antennas are installed in surface of shell groove；
S4: the K-band rf board and F waveband radio frequency plate are installed in the cavity of the shell, by K-band rf board
It is connect with K-band antenna by glass insulator and feed pin, and F waveband radio frequency plate and K-band antenna is passed through into glass insulation
Son is connected with feed pin；
S5: K-band rf board is connected by the row's of being respectively adopted needle connector with K-band IF board in the cavity of shell, will
The F waveband radio frequency plate is connected with F wave band IF board；
S6: a signal-processing board is connected with K-band IF board and F wave band IF board using a shielded lead respectively, and
The signal-processing board is connect with row's adapter.
The front end system of plate two-band detector of the invention realizes two using K-band antenna and F wave band antenna
Frequency range K frequency range and F-band collaboration detection, may be implemented anti-interference detection；The present invention carries out intermediate frequency using IF board and filters out, can be with
Detection differentiates 8-12m apart from Small object, selects blind view for the distant object other than 20m, i.e., to the echo signal for being greater than 20m
Intermediate frequency is carried out to filter out.In addition, the K-band antenna and F wave band antenna of the front end system of plate two-band detector of the invention
It is all made of single slot antenna, so that wave beam visual angle is 90-120 degree, and realizes detection of leaning forward using the slot antenna that leans forward, to improve
Detection accuracy of the flyer in high-speed flight reduces rate of failing to report, is suitable for high-speed flight target acquisition.Plate of the invention
The front end system of the type two-band detector structure coplanar with antenna using circuit board has suitable to form thin flat plate structure
It closes wall and advantage is installed, there is concealment, using Miniaturization Design, realize that micromation is integrated.In addition, of the invention is plate double
The electric switch using electric signal control is equipped in the signal-processing board of the front end system of frequency range detector, it can be according to detecting
Interfering frequency adaptively switches between K and F-band, realizes anti-interference.
Detailed description of the invention
Fig. 1 is the top view of the front end system of plate two-band detector according to an embodiment of the invention.
Fig. 2 is the sectional view of the line A-A along Fig. 1.
Fig. 3 is the sectional view of the line B-B along Fig. 1.
Fig. 4 is the structural schematic diagram of the K-band antenna of the front end system of plate two-band detector as shown in Figure 1.
Fig. 5 is the structural schematic diagram of the F wave band antenna of the front end system of plate two-band detector as shown in Figure 1.
Appended drawing reference
1, shell；2a, K-band antenna；2b, F wave band antenna；3, signal-processing board；31, adapter is arranged；4a, K-band are penetrated
Frequency plate；4b, F waveband radio frequency plate；5a, K-band IF board；5b, F wave band IF board；61, glass insulator；62, feed pin；7,
Radio frequency absorbing material；8, shielded lead；
21, antenna housing；211, antenna slit；22, antenna absorbing material；23, antenna medium.
Specific embodiment
With reference to the accompanying drawing, presently preferred embodiments of the present invention is provided, and is described in detail, makes to be better understood when this hair
Bright function, feature.
As shown in Figure 1-Figure 3 for according to the front end system of the plate two-band detector of one embodiment of the present of invention,
It includes that shell 1, the shell 1 are the slab construction for being used to support the front end system of entire plate two-band detector, packet
It includes cavity 11 and its surface groove is embedded with 2 K-band antenna 2a and 2 F wave band antenna 2b, which has one
Signal-processing board 3, K-band rf board 4a, F waveband radio frequency plate 4b, K-band IF board 5a and F wave band IF board 5b.Shell 1
The quantity of cavity 11 is 3, and the K-band radio frequency cavity including accommodating the K-band rf board 4a accommodates the F wave band
It the F waveband radio frequency cavity of rf board 4b and accommodates at the intermediate-freuqncy signal of the signal-processing board 3 and two IF boards 5a, 5b
Cavity is managed, between K-band radio frequency cavity and IF signal processing cavity and F waveband radio frequency cavity and IF signal processing chamber
It being spaced apart respectively by a partition 12 between body, the material of partition 12 is metal simple-substance (such as copper) or alloy (such as kovar alloy),
It avoids radiofrequency signal from interfering with a thickness of 1mm for obstructing the conduction of the electromagnetic wave between rf board 4a, 4b and IF board 5a, 5b
IF board and signal-processing board 3.The opening of the cavity 11 of the shell 1 is closed by a metal cover board 13, which uses
In preventing extraneous electromagnetic wave interference to be directly entered rf board 4a, 4b and IF board 5a, 5b.K-band radio frequency cavity and F waveband radio frequency
Radio frequency absorbing material 7 is equipped in cavity, radio frequency absorbing material 7 is short fiber~+ ferrite high-molecular organic material, further to inhale
Electromagnetic wave in cavity is received, circuit signal noise is reduced.
The K-band antenna 2a, K-band rf board 4a, K-band IF board 5a and signal-processing board 3 are sequentially connected electrically, institute
It states F wave band antenna 2b, F waveband radio frequency plate 4b, F wave band IF board 5b and signal-processing board 3 is sequentially connected electrically, the signal processing
Plate 3 is connect with row's adapter 31, and plate two-band detector of the invention forms K-band receiving-transmitting chain and F wave as a result,
Section receiving-transmitting chain realizes K and F-band collaboration detection, and the K frequency range is 24 ± 2GHz, and the F-band is 110 ± 5GHz, when
When target occurs, intermediate frequency has the output of echo signal time domain, and the intermediate-freuqncy signal received is passed through FFT transform by signal-processing board 3, becomes
For frequency-region signal, target range is determined according to frequency spectrum, and then realizes anti-interference detection.
Wherein, between K-band antenna 2a and K-band rf board 4a and between F wave band antenna 2b and F waveband radio frequency plate 4b
Respectively it is connected by one group of glass insulator 61 with feed pin 62, to realize the electrical connection of antenna 2a, 2b and rf board 4a, 4b, from
And electric signal is transmitted to antenna 2a, 2b by IF board 5a, 5b, it is transformed into electromagnetic wave energy, launches along slot antenna.
Wherein, pass through between K-band rf board 4a and K-band IF board 5a and between F waveband radio frequency plate 4b and F wave band IF board 5b
5 row's needle connectors 121 electrical connection being inserted on the partition 12, for connecting the output end and intermediate frequency of rf board 4a, 4b
The input terminal of plate 5a, 5b (amplification and filtering) comprising the needle wrapped up by plastic material insulate between needle, to realize rf board
Electrical connection between 4a, 4b and IF board 5a, 5b, so that intermediate-freuqncy signal of rf board 4a, 4b output without amplification.K-band
IF board 5a and F wave band IF board 5b is connected with signal-processing board 3 by the shielded lead 8 that a diameter is 1mm respectively, to realize
Electrical connection.In addition, the signal-processing board 3, rf board 4a, 4b, IF board 5a, 5b and 5 rows needle connector 121, screen
It covers lead 8 to be coplanar with, to reduce slab-thickness, is installed convenient for metope, there is hidden detectivity.In addition, of the invention is double
The front end system of frequency range detector uses miniaturized design, realizes that miniaturization is integrated, and volume is (8-12) cm* (3-5) cm*
(0.8-1.2)cm。
It is equipped with the electric switch using electric signal control in signal-processing board 3, therefore can be switched with auto-changeover control and be switched,
The high electricity frequency of echo signal output is detected, electric switch is controlled, closes work at present radio circuit, start another radio circuit, with
It is switched to another frequency range.
K-band rf board 4a and F waveband radio frequency plate 4b includes the signal source being sequentially connected corresponding with K-band, voltage-controlled
Oscillator and function point, and transmitting branch and receiving branch with the function split-phase even.Signal source and voltage controlled oscillator phase as a result,
Even, signal source generates modulation voltage, and control voltage controlled oscillator output high-frequency signal, voltage controlled oscillator and function split-phase connect, signal warp
It crosses function and is divided into two-way, be all the way transmitting branch, connect the first low-noise amplifier, signal is transmitted to transmitting day by amplification
Line (i.e. one of them of one of them or the F wave band antenna 2b of K-band antenna 2a)；Another way is receiving branch, is successively connected
Frequency mixer, the second low-noise amplifier and a receiving antenna are connect (i.e. in another or F wave band antenna 2b in K-band antenna 2a
Another).The signal received is passed through second low-noise amplifier by receiving antenna, is transmitted to the frequency mixer, with
The high-frequency signal of power splitter transmitting branch is mixed, and exports intermediate-freuqncy signal, and pass to described IF board 5a, 5b.K frequency range rf board
The voltage controlled oscillator of 4a selects 12GHz voltage controlled oscillator, frequency multiplication to 24GHz；The voltage controlled oscillator of F waveband radio frequency plate 4b is selected
13.5GHz voltage controlled oscillator, 8 frequencys multiplication to 110GHz.Preferably, K-band rf board 4a is SITROSP3 multifunction chip, is included
VCO, LNA, Mixer Divider, Buffer.Model MTN801 (the 0- of the low-noise amplifier of F waveband radio frequency plate 4b
105GHz), the model TCD1901 (100-105GHz) of frequency mixer, the model TCD904 of frequency multiplier, the type of voltage controlled oscillator
Number be SIV018SP4.K-band rf board 4a and F waveband radio frequency plate 4b all has the output end exported from the frequency mixer of rf board,
It is preferably 5 metal pad.
K-band IF board 5a and F wave band IF board 5b include the triangle wave generating circuit being sequentially connected, filter module and
Amplifying circuit.Triangle wave generating circuit is by turning triangle wave circuit for standard block, to realize that triangular wave generates.Preferably, institute
State triangle wave generating circuit, filter module and amplifying circuit using Altium designer design, triangle wave generating circuit it is defeated
Frequency is 30kHz out, to control the output bandwidth of triangle wave generating circuit as 200kHz-2.5MHz, i.e. intermediate-frequency bandwidth；It is described to put
Big circuit is ADA4857-2 operational amplifier.Filter module realizes LC bandpass filtering by design combined resistance, capacitor and inductor.
The present invention is filtered out by using IF board progress intermediate frequency as a result, can detect 8-12m distant object (RCS=0.1), and right
The blind view of target selection other than 20m carries out intermediate frequency using IF board to the echo signal greater than 20m and filters out.
As shown in fig. 4-5, the quantity of K-band antenna 2a and F wave band antenna 2b is 2, and is single slit that leans forward
Antenna, to realize that 90-120 degree wide viewing angle detects comprising an antenna housing 21 with cavity, the material of the antenna housing 21
For copper, and one of surface is equipped with antenna slit 211.One end is equipped with antenna absorbing material 22, rest part in the cavity
It is the antenna medium 23 of polytetrafluoroethylene (PTFE) filled with material.Glass insulator 61 and feed pin 62 described above is inserted in described
Far from one end of the antenna absorbing material 22 on antenna housing 21.Wherein, length 85mm ± 1mm of K-band antenna 2a, width
5mm ± 1mm, length 50mm ± 2mm of thickness 3mm ± 0.5mm, F wave band antenna 2b), width 4mm ± 1mm, thickness 3mm ±
0.5mm。
Based on the front end system of plate two-band detector above, the present invention also provides a kind of plate two-bands to visit
The implementation method for surveying the front end system of device, includes the following steps:
Step S1: one shell 1 of production；
Wherein, shell 1 includes 3 cavitys, is spaced apart respectively by a partition 12 between cavity, for avoiding electricity between cavity
Wavelet interference.Radio frequency absorbing material 7 is equipped in K-band radio frequency cavity and F waveband radio frequency cavity, radio frequency absorbing material 7 is short fibre
Dimension+ferrite high-molecular organic material reduces circuit signal noise with electromagnetic wave in further absorbing cavity body.Waveband radio frequency chamber
Body, F waveband radio frequency cavity is interior to use radio frequency absorbing material 7, and electromagnetic wave in further absorbing cavity body reduces circuit signal noise.
Step S2: in one K-band rf board 4a of production, a F waveband radio frequency plate 4b, a K-band IF board 5a and a F wave band
Frequency plate 5b.
Preferably, K-band rf board 4a is SITROSP3 multifunction chip, includes VCO, LNA, Mixer Divider,
Buffer.The model MTN801 (0-105GHz) of the low-noise amplifier of F waveband radio frequency plate 4b, the model of frequency mixer
TCD1901 (100-105GHz), the model TCD904 of frequency multiplier, the model SIV018SP4 of voltage controlled oscillator.In K-band
Frequency plate 5a and F wave band IF board 5b includes the triangle wave generating circuit, filter module and amplifying circuit being sequentially connected, the triangle
Wave circuit, filter module and amplifying circuit are designed using Altium designer, and the amplifying circuit is ADA4857-2 operation
Amplifier.Filter module realizes LC bandpass filtering by design combined resistance, capacitor and inductor.
Step S3: 2 K-band antenna 2a and 2 F wave band antenna 2b are installed in 1 surface groove of shell, are specifically included:
Silver paste is first coated on to the surface groove of shell 1, K-band antenna 2a and F wave band antenna 2b is embedded in the groove, in baking oven
120 degree are toasted 2 hours, to guarantee that antenna is closely connect with groove.
Wherein, K-band antenna 2a and F wave band antenna 2b is single slot antenna.
Step S4: K-band rf board 4a and F waveband radio frequency plate 4b is installed in the cavity 11 of shell 1, K-band is penetrated
Frequency plate 4a and K-band antenna 2a are connect by glass insulator 61 and feed pin 62, and by F waveband radio frequency plate 4b and K-band day
Line 2b is connected by glass insulator 61 and feed pin 62.
Wherein, the K-band rf board 4a is installed in K-band radio frequency inside cavity, and F waveband radio frequency plate 4b is installed in
F waveband radio frequency inside cavity.
Step S5: the row's of being respectively adopted needle connector 121 will be in K-band rf board 4a and K-band in the cavity 11 of shell 1
Frequency plate 5a is connected, and the F waveband radio frequency plate 4b is connected with F wave band IF board 5b；
Step S6: a signal-processing board 3 is drawn with K-band IF board 5a and F wave band IF board 5b using a shielding respectively
Line 8 is connected, and the signal-processing board 3 is connect with row's adapter 31.
As a result, when target occurs, intermediate frequency has the output of target time-domain signal, during digital signal processing unit will receive
Frequency signal passes through FFT transform, becomes frequency-region signal, determines target range according to frequency spectrum.
Above-described, only presently preferred embodiments of the present invention, the range being not intended to limit the invention, of the invention is upper
Stating embodiment can also make a variety of changes.Made by i.e. all claims applied according to the present invention and description
Simply, equivalent changes and modifications fall within the claims of the invention patent.The not detailed description of the present invention is
Routine techniques content.
Claims (10)
1. a kind of front end system of plate two-band detector, which is characterized in that including shell (1), the shell (1) be plate
Structure comprising cavity (11) and its surface groove is embedded with K-band antenna (2a) and F wave band antenna (2b), the cavity
(11) inner containment have signal-processing board (3), K-band rf board (4a), F waveband radio frequency plate (4b), K-band IF board (5a) and
F wave band IF board (5b)；At the K-band antenna (2a), K-band rf board (4a), K-band IF board (5a) and the signal
Reason plate (3) is sequentially connected electrically, F wave band antenna (2b), F waveband radio frequency plate (4b), F wave band IF board (5b) and the signal processing
Plate (3) is sequentially connected electrically, and signal-processing board (3) is connect with row's adapter (31).
2. the front end system of plate two-band detector according to claim 1, which is characterized in that the shell (1)
The quantity of cavity (11) be 3, the K-band radio frequency cavity including accommodating the K-band rf board (4a) accommodates described
The F waveband radio frequency cavity of F waveband radio frequency plate (4b) and accommodate the signal-processing board (3), K-band IF board (5a) and F
The IF signal processing cavity of wave band IF board (5b).
3. the front end system of plate two-band detector according to claim 2, which is characterized in that the K-band is penetrated
Pass through respectively between frequency cavity and IF signal processing cavity and between F waveband radio frequency cavity and IF signal processing cavity
One partition (12) is spaced apart, and the material of partition (12) is metal simple-substance or alloy, and the K-band radio frequency cavity and F wave band are penetrated
Radio frequency absorbing material (7) are equipped in frequency cavity.
4. the front end system of plate two-band detector according to claim 1, which is characterized in that the K-band day
Respectively pass through one between line (2a) and K-band rf board (4a) and between the F wave band antenna (2b) and F waveband radio frequency plate (4b)
Group glass insulator (61) be connected with feed pin (62), between the K-band rf board (4a) and K-band IF board (5a) and
Row's needle connector between the F waveband radio frequency plate (4b) and F wave band IF board (5b) by being inserted on the partition (12)
(121) it is electrically connected, and the K-band IF board (5a) and F wave band IF board (5b) pass through with the signal-processing board (3) respectively
One shielded lead (8) is connected.
5. the front end system of plate two-band detector according to claim 4, which is characterized in that the signal processing
Plate (3), K-band rf board (4a), F waveband radio frequency plate (4b), K-band IF board (5a), F wave band IF board (5b) and the row
Needle connector (121), shielded lead (8) are coplanar with.
6. the front end system of plate two-band detector according to claim 1, which is characterized in that the K-band day
Line (2a) and F wave band antenna (2b) are single slot antenna that leans forward.
7. the front end system of plate two-band detector according to claim 1, which is characterized in that the signal processing
The electric switch using electric signal control is equipped in plate (3).
8. the front end system of plate two-band detector according to claim 1, which is characterized in that the K-band day
The quantity of line (2a) and the F wave band antenna (2b) is 2, and K-band rf board (4a) and F waveband radio frequency plate (4b) include
The signal source being sequentially connected corresponding with K-band, voltage controlled oscillator and function point, and the hair being connected with two branches that the function is divided to
Penetrate branch and receiving branch, the transmitting branch is sequentially connected wherein the one of the first low-noise amplifier and K-band antenna (2a)
It is a or F wave band antenna (2b) one of them, the receiving branch is sequentially connected frequency mixer, the second low-noise amplifier and K wave
Another in another or F wave band antenna (2b) in section antenna (2a).
9. the front end system of plate two-band detector according to claim 1, which is characterized in that in the K-band
Frequency plate (5a) and F wave band IF board (5b) include triangle wave generating circuit, filter module and the amplifying circuit being sequentially connected, and three
The output frequency of angle wave generation circuit is 30kHz and output bandwidth is 200kHz-2.5MHz.
10. a kind of production method of the front end system of plate two-band detector characterized by comprising
Step S1: production one shell (1)；
Step S2: one K-band rf board (4a) of production, a F waveband radio frequency plate (4b), a K-band IF board (5a) and a F wave band
IF board (5b)；
Step S3: 2 K-band antennas (2a) of installation and 2 F wave band antennas (2b) in the shell (1) surface groove；
Step S4: the K-band rf board (4a) and F waveband radio frequency plate (4b) are installed on to the cavity (11) of the shell (1)
In, K-band rf board (4a) and K-band antenna (2a) are connect by glass insulator (61) and feed pin (62), and by F wave
Section rf board (4b) is connect with K-band antenna (2b) by glass insulator (61) and feed pin (62)；
Step S5: the row's of being respectively adopted needle connector (121) is by K-band rf board (4a) and K wave in the cavity (11) of shell (1)
Section IF board (5a) is connected, and the F waveband radio frequency plate (4b) is connected with F wave band IF board (5b)；
Step S6: by a signal-processing board (3) respectively with K-band IF board (5a) and F wave band IF board (5b) using a shielding
Lead (8) is connected, and the signal-processing board (3) is connect with row's adapter (31).
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