CN106405505A - Dual-frequency vector sensor used for HF/VHF radar - Google Patents
Dual-frequency vector sensor used for HF/VHF radar Download PDFInfo
- Publication number
- CN106405505A CN106405505A CN201610856840.7A CN201610856840A CN106405505A CN 106405505 A CN106405505 A CN 106405505A CN 201610856840 A CN201610856840 A CN 201610856840A CN 106405505 A CN106405505 A CN 106405505A
- Authority
- CN
- China
- Prior art keywords
- module
- vector sensor
- frequency vector
- antenna
- magnetic rod
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
-
- 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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/02—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S13/00
- G01S7/03—Details of HF subsystems specially adapted therefor, e.g. common to transmitter and receiver
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
- H01Q7/06—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop with core of ferromagnetic material
- H01Q7/08—Ferrite rod or like elongated core
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention discloses a dual-frequency vector sensor used for an HF/VHF radar. The dual-frequency vector sensor comprises a monopole antenna, two mutually orthogonal magnetic rod antennas wound with lead wires, a high-isolation switch control module which is newly designed by utilizing a diode, a transformer module, a low-noise amplifier module, a common-mode interference resisting module, and a TNC interface module connected with a receiver by means of a cable, wherein the high-isolation switch control module, the transformer module, the low-noise amplifier module, the common-mode interference resisting module and the TNC interface module are connected in sequence. Compared with the prior art, the dual-frequency vector sensor removes active devices such as an optocoupler chip, a step-down chip and a switching chip, and decreases the noise floor inside the antennas as much as possible, and improves the isolation between the antennas; the high-isolation switch control module which is newly designed by utilizing the diode can enable the antenna to operate at two different frequencies in a time-sharing manner ideally, and the dual-frequency vector sensor improves the precision of ocean wind wave and flow detection and adaptive capacity in different ocean conditions of a high-frequency ocean radar, and improves the accuracy of detecting and tracking hard targets such as ships at sea and low-altitude aircrafts as well as detectability for targets of different masses and attitudes.
Description
Technical field
The present invention relates to antenna technical field is and in particular to a kind of double frequency vector sensor for HF/VHF radar.
Background technology
Lower frequency radar, for example, be operated in the radar of HF/VHF frequency band, and wavelength can be compared with Scattering Targets, widely should
For the monitoring of ocean surface kinetic parameter.And its distinctive sky wave and earthwave over-the-horizon propagation pattern can detect horizon
Goal of is so as to also be readily applicable to detect the targets such as aircraft, naval vessel, guided missile.
In order to reach the directional diagram gain suitable with microwave radar, traditional array radar needs larger antenna array
Long, commonly reach the even upper km of hundreds of rice.United States Patent (USP) U.S.Pat.No.4433336 has invented a kind of crossed loops/monopole
(crossed-loops/monopole) three-element antenna, is a kind of Combined Antenna System of compact.This antenna system is using many
Weight signal sorting algorithm (Multiple Signal Classification) achieve preferable angle detection precision, simultaneously its
The floor space having is little, the feature of low cost is so as to be widely used in high frequency marine radar in recent two decades.
Wuhan University develop double frequency Full digital high-frequency marine radar be mainly used in detect ocean surface wind, wave, flow field and
Low speed moves target, patent《A kind of digital radar installations of the compact battle array of multifrequency》(ZL：201320260206.9) devise a set of
Radar system can be operated under multifrequency pattern, with adapt to different scale wave detection needs, and lifted target acquisition with
And interference free performance.This radar system needs time-sharing work in two frequencies, has attempted accomplished in many ways double frequency vector for this
The development of sensor, but have switch chip isolation all undesirable lead to that sensing capability is not enough, internal circuit unknown (even if interior
Radical road capacitor and inductor all be likely to affect loop antenna resonance), also need to addition decompression voltage regulator come for chip supply
Electricity make each passage of sensor unbalanced and raise inner antenna make an uproar bottom the problems such as.
Content of the invention
It is an object of the invention to overcoming disadvantages mentioned above present on prior art and deficiency, a kind of new double frequency is provided to swear
Quantity sensor design, enables this sensor to be more desirably operated in single-frequency and two-frequency operation pattern, multiple sensors
Between make an uproar bottom, induction of signal ability all more equalize, thus improve high frequency marine radar to ocean surface kinetic parameter
Detection accuracy and adaptability, sea ships, the antijamming capability of aircraft, the detectivity of guided missile and radar.
Technical scheme is as follows：
A kind of double frequency vector sensor for HF/VHF radar, including monopole antenna, two groups of mutually orthogonal bar magnets
Antenna, and the onboard circuit of rear class；
Described monopole antenna, magnetic rod antenna are connected with onboard circuit respectively.
Wherein, described onboard circuit includes：The high isolation switch control module that is sequentially connected, transformer module, low
Noise amplifier module, anti-common mode disturbances module, TNC interface module；
Described monopole antenna is connected with anti-common mode disturbances module, and described magnetic rod antenna controls mould by high isolation switch
Block is connected with transformer module.
Wherein, two groups of mutually orthogonal magnetic rod antennas, are made up of two groups of sub- bar magnets respectively, in two groups of magnetic rod antenna common phase positions
The heart and mutually orthogonal.
Wherein, every group of described sub- bar magnet, by four ferrite magnetic bar constructions, is wound with multiturn wire above ferrite bar,
Described diameter of wire is more than 0.8mm.
Wherein, the described wire number of turn is more than two groups.
Wherein, two groups of described mutually orthogonal magnetic rod antennas are put or are put using hollow using cross.
Wherein, two groups of mutually orthogonal magnetic rod antennas are two completely orthogonal 8 font directional diagrams, and monopole antenna is complete
To antenna.
Wherein, described high isolation switch control module includes：The friendship that one group of diode being mutually butted, electric capacity are constituted
Logical circulation road, the DC channel of inductance composition, in check tunable capacitor, control signal incoming end,
The frequency control signal of described control signal incoming end input provides low and high level to control diode pair pipe break-make,
Control whether coupled tunable capacitor is incorporated to LC resonance, thus neatly realize two operating frequency timesharing of magnetic rod antenna
Work.
Compared with prior art, the present invention has the advantages that：
1, the double frequency vector sensor of the present invention, can according to actual detection need flexible select time-division dual frequency work and
Single frequency operation, and resonance point can be adjusted in larger frequency range.
2, the high isolation switch module that the present invention adopts, make use of and all open close to ideal under diode break-make two states
The feature closed, has low on-resistance and great off resistance so that this double frequency vector sensor is in two frequencies designing
And the sensing capability of approximate ideal can be reached on each frequency after adjustment resonance point, substantially there is no energy attenuation.Should
Antenna also has extremely short switch conversion time, than more than little three orders of magnitude of control signal pulsewidth of input so as to can be fast
Speed ground switch operating state is to realize two operating frequency time division multiplexes.
3, the application of the present invention is so that traditional high frequency marine radar can realize two frequency timesharing in a radar
Work, the timesharing realizing two frequency signals in a compact receiving array receives, and on the one hand reduces radar system and makes
Valency, decreases radar system and sets up area, on the other hand also greatly improve the monitoring to ocean stormy waves flow field for the radar system
Ability, improves the detectability to low target, surface vessel, further enhances the antijamming capability of radar system.
Brief description
Fig. 1 is the general frame of annexation between each module of the present invention.
Fig. 2 is two kinds of disposing ways of two groups of orthogonal magnetic rod antennas that the present invention adopts.
Fig. 3 is the block diagram of the loop antenna each several part annexation that the present invention adopts.
Fig. 4 is the horizontal plane direction of an electric field figure of three sensors of the present invention.
Fig. 5 is the high isolation switch control module schematic diagram that the present invention adopts.
Specific embodiment
Below in conjunction with the accompanying drawings and embodiment, the present patent application is described in further detail.
Referring to accompanying drawing 1, a kind of double frequency vector sensor for HF/VHF radar that embodiment provides is by monopole antenna
MONOPOLE, mutually orthogonal magnetic rod antenna LOOPA and LOOP B, and onboard circuit；Described monopole antenna, magnetic rod antenna
It is connected with onboard circuit respectively.Onboard circuit includes high isolation switch control module (abbreviation KG), the transformer being sequentially connected
Module (abbreviation BY), low noise amplifier module (abbreviation LNA), anti-common mode disturbances module (abbreviation EL), TNC interface module.
Referring to accompanying drawing 1, signal that monopole antenna senses is directly over anti-common mode disturbances module and just exports connecing to rear class
Receipts machine, two group magnetic rod antennas centrical with monopole antenna common phase have passed through transformer module, low noise amplifier module, resist
Export to rear class receiver after common mode disturbances module.
Referring to accompanying drawing 2, two groups of mutually orthogonal magnetic rod antennas, it is made up of two groups of sub- bar magnets respectively, every group of sub- bar magnet is by four
Root ferrite magnetic bar construction, is wound with multiturn wire above ferrite bar, the described wire number of turn is more than two groups.Described wire is straight
Footpath is more than 0.8mm.Two groups of magnetic rod antennas phase center and mutually orthogonal altogether, has two kinds of disposing ways：Cross put and mouth word
Type is put.Requirement is that two groups of sub- bar magnets can realize in-phase stacking to the electric current sensing, two groups of magnetic rod antennas include its correspondence
The onboard circuit of rear class all completely orthogonal, with monopole antenna altogether phase center.
Referring to accompanying drawing 3, in embodiment, give the block diagram of magnetic rod antenna LOOPA each several part annexation.High-isolation is opened
Close the inductance L composition LC series resonant tank that the tunable capacitor in control module and the wire on magnetic rod antenna are formed, by two groups
The voltage of the external electromagnetic field that sub- bar magnet L1 and L2 senses carries out in-phase stacking, and this magnetic rod antenna is sensed by transformer module
Both-end voltage conversion become single ended voltage, input low noise amplifier module, through anti-common mode disturbances module, from TNC interface mould
A interface in block inputs to rear class radar receiver through cable and carries out signal transacting.
As magnetic rod antenna LOOPA, difference is two bar magnets to each several part annexation of magnetic rod antenna LOOP B
The onboard circuit of putting position and rear class is all accomplished completely orthogonal.
Referring to accompanying drawing 4, embodiment gives this sensor levels face direction of an electric field figure, magnetic rod antenna LOOPA and LOOP B
It is two completely orthogonal 8 font directional diagrams.Monopole antenna MONOPOLE is omnidirectional antenna, in the response of all angles is all
The same.The directional diagram of this compact combination sensor is the good basis estimating signal angle for later stage signal transacting.
Directional diagram under two operating frequencies for the double frequency vector sensor all as shown in Figure 4, remains monopole sky
Line is omnidirectional antenna, and two orthogonal magnetic rod antennas are 8 mutually orthogonal fonts.
Referring to accompanying drawing 5, embodiment gives the circuit theory diagrams of high isolation switch control module.Including：One group mutual
The diode of docking, the alternating current path of electric capacity composition, the DC channel of inductance composition, in check tunable capacitor, control signal
Incoming end, the frequency control signal of described control signal incoming end input provides low and high level to control diode pair pipe break-make,
Control whether coupled tunable capacitor is incorporated to LC resonance, thus neatly realize two operating frequency timesharing of magnetic rod antenna
Work.This module is most important for double frequency time-sharing work, because it has low conduction impedance, high disconnection impedance, and switch switching
The short feature of time interval.Control two poles using diode pair pipe with the voltage difference on datum ground under low and high level control
The break-make of pipe, thus controls whether tunable capacitor is incorporated to LC series loop, changes the resonance point of LC series resonance, and at two
Energy attenuation very little on resonance point so that double frequency vector sensor be capable of approximate ideal be operated in two frequencies.
The inductance L of the tunable capacitor in described high isolation switch control module and the formation of the wire on magnetic rod antenna is constituted
LC series resonant tank, the voltage of the external electromagnetic field that two groups of sub- bar magnets are sensed carries out in-phase stacking, and transformer module will
The both-end voltage conversion that this magnetic rod antenna senses becomes single ended voltage, inputs low noise amplifier module, through anti-common mode disturbances
Module, inputs to rear class radar receiver from TNC interface module through cable and carries out signal transacting.
The voltage conversion at magnetic rod antenna two ends can be transferred to low noise for single ended voltage and put by described transformer module
Big device module, and reasonably select transformation ratio can change LC loop Q value thus changing frequency bandwidth and the peak of magnetic rod antenna
Value gain.
Transmitting antenna transmitting is electric signal, monopole antenna induction field energy, and magnetic rod antenna induced field energy,
The signal energy intensity enabling to sense after described low noise amplifier module is mutually Jun Heng with monopole antenna, with
When also avoid the too weak energy loss in cable transmission of signal.
Magnetic rod antenna in double frequency vector sensor is a kind of loop antenna based on the design of LC series resonant circuit, two groups of sons
Bar magnet senses the magnetic field in the external world, and the magnetic flux of alternation produces the electric current of alternation in its coiling, for the electricity in resonant frequency
Magnetic wave has the energy attenuation of minimum.
When two-frequency operation, control level FreqControl is provided by rear class receiver, in embodiment, we provide
Control the gate level that level is 0/3.3V.
When controlling level to be 0V, for diode D1 and D2, two ends are all 0V, and diode is in cut-off state, etc.
Imitate and in a great resistance, tunable capacitor C3 branch road is disconnected, tunable capacitor C4 and bar magnet inductance are now only had on alternating current path
L1, L2 are in series, and now resonant frequency is：
When controlling level to be 3.3V, for diode D1 and D2, between positive pole and negative pole, voltage difference reaches 3.3V, two poles
Pipe is both turned on, and tunable capacitor C3 branch road is in parallel by the resistance being equivalent to a very little with tunable capacitor C4, now alternating current path
Upper tunable capacitor C3 and C4 is in parallel and is in series with bar magnet inductance L1, L2, and now resonant frequency is：
By adjusting tunable capacitor C3, C4, can be by the two of double frequency vector sensor frequency tuning to required for us
Operating frequency, and have benefited from the switch module of this diode design and be similar to preferable hilted broadsword list putting switch, at two
The receiving efficiency of preferable single-frequency magnetic rod antenna is all substantially equivalent on operating frequency.
Detection for ocean stormy waves flow field, it usually needs longer coherent accumulation time, and ocean may be considered
A kind of stable random process.Diode has the break-make switching time being exceedingly fast so that we can be in one section of coherent accumulation
The interior coherent accumulation result finally simultaneously obtaining two operating frequencies by the timesharing reception between snap.
Described double frequency vector sensor also includes the compartment of sensor, support bar, accessory cables, spud pile rope.With
Upper device constitutes complete double frequency vector sensor system.Monopole antenna is vertically mounted on compartment center, by box
The banana head covering is connected with onboard circuit center, and the cable interface being re-fed into compartment bottom is connected with radar receiver
Connect.
After completing the design of whole double frequency vector sensor, test the humorous of this double frequency vector sensor with Network Analyzer
Characteristic of shaking it was demonstrated that whole sensor really resonance with two frequencies.Also need to be placed in compartment, even good cable, profit
Set up with support bar and spud pile rope.Using signal source and other standards antenna, respectively signal is added in double frequency arrow
On three sensing elements of quantity sensor, in one kilometer of distance in addition of this sensor, receiving various antennas successively respectively
Radiation signal is it may be verified that the antenna pattern characteristic of this sensor all angles at different frequencies.
Compared with prior art, eliminate the active devices such as opto-coupler chip, step-down chip, switch chip, reduce as far as possible
The noise floor of inner antenna and increase the isolation between each antenna；High isolation switch using diode brand-new design
Module enable this antenna ideally time-sharing work in two different frequencies, this invention one side improve high frequency marine radar visit
Adaptability under the precision of survey ocean stormy waves stream and different sea situation, also improves the hard mesh for marine ships, low altitude aircraft etc.
Target detection and the accuracy followed the tracks of and the target detection capabilities to the different scale of constructions, attitude.
Specific embodiment described herein is only explanation for example to present invention spirit.The affiliated technology of the present invention is led
The technical staff in domain can be made various modifications or supplement or replaced using similar mode to described specific embodiment
Generation, but the spirit without departing from the present invention or surmount scope defined in appended claims.
Claims (8)
1. a kind of double frequency vector sensor for HF/VHF radar it is characterised in that:Including monopole antenna, two groups mutually just
The magnetic rod antenna handed over, and the onboard circuit of rear class；
Described monopole antenna, magnetic rod antenna are connected with onboard circuit respectively.
2. the double frequency vector sensor for HF/VHF radar according to claim 1 it is characterised in that：Described is onboard
Circuit includes：The high isolation switch control module that is sequentially connected, transformer module, low noise amplifier module, anti-common mode are done
Disturb module, TNC interface module；
Described monopole antenna is connected with anti-common mode disturbances module, described magnetic rod antenna pass through high isolation switch control module with
Transformer module connects.
3. the double frequency vector sensor for HF/VHF radar according to claim 2 it is characterised in that：Two groups mutually just
The magnetic rod antenna handed over, is made up of two groups of sub- bar magnets respectively, two groups of magnetic rod antennas phase center and mutually orthogonal altogether.
4. the double frequency vector sensor for HF/VHF radar according to claim 3 it is characterised in that：Described every group
Sub- bar magnet, by four ferrite magnetic bar constructions, is wound with multiturn wire above ferrite bar, described diameter of wire is more than
0.8mm.
5. the double frequency vector sensor for HF/VHF radar according to claim 4 it is characterised in that：Described conductor turns
Number is more than two groups.
6. the double frequency vector sensor for HF/VHF radar according to claim 1 it is characterised in that：Described two groups
Mutually orthogonal magnetic rod antenna is put or is put using hollow using cross.
7. the double frequency vector sensor for HF/VHF radar according to claim 1 it is characterised in that：Two groups mutually just
The magnetic rod antenna handed over is two completely orthogonal 8 font directional diagrams, and monopole antenna is omnidirectional antenna.
8. the double frequency vector sensor for HF/VHF radar according to claim 2 it is characterised in that：Described height every
Include from degree switch control module：One group of diode being mutually butted, the alternating current path of electric capacity composition, direct current of inductance composition lead to
Road, in check tunable capacitor, control signal incoming end,
The frequency control signal of described control signal incoming end input provides low and high level to control diode pair pipe break-make, controls
Whether coupled tunable capacitor is incorporated to LC resonance, thus neatly realizes two operating frequency timesharing works of magnetic rod antenna
Make.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610856840.7A CN106405505A (en) | 2016-09-28 | 2016-09-28 | Dual-frequency vector sensor used for HF/VHF radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610856840.7A CN106405505A (en) | 2016-09-28 | 2016-09-28 | Dual-frequency vector sensor used for HF/VHF radar |
Publications (1)
| Publication Number | Publication Date |
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| CN106405505A true CN106405505A (en) | 2017-02-15 |
Family
ID=57997118
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610856840.7A Pending CN106405505A (en) | 2016-09-28 | 2016-09-28 | Dual-frequency vector sensor used for HF/VHF radar |
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| CN105006648A (en) * | 2015-08-20 | 2015-10-28 | 武汉大学 | Dual-band transceiver co-pole antenna system for high-frequency marine radar |
| CN204966698U (en) * | 2015-08-20 | 2016-01-13 | 武汉大学 | A dual -frenquency receiving and dispatching are pole antenna system altogether for high frequency ocean radar |
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2016
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201408843Y (en) * | 2009-05-19 | 2010-02-17 | 武汉大学 | Compact receiving antenna of portable high-frequency sea-detecting radar |
| CN102509899A (en) * | 2011-10-10 | 2012-06-20 | 武汉德威斯电子技术有限公司 | Transmitting-receiving shared antenna applied to high-frequency ground wave radar |
| CN203224623U (en) * | 2013-05-14 | 2013-10-02 | 武汉大学 | Multi-frequency compact-type array all-digital radar device |
| CN203519823U (en) * | 2013-10-28 | 2014-04-02 | 武汉大学 | High-power shortwave broadband transmit-receive switch |
| CN104659491A (en) * | 2015-02-10 | 2015-05-27 | 武汉大学 | Miniature receiving antenna and azimuth estimation method for HF/VHF radar |
| CN104914426A (en) * | 2015-06-15 | 2015-09-16 | 北京科技大学 | Near field ranging system and method based on adaptive time delay estimation |
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