CN104122535A - True time delay device based phased-array antenna broadband anti-interference method - Google Patents

True time delay device based phased-array antenna broadband anti-interference method Download PDF

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Publication number
CN104122535A
CN104122535A CN201410342217.0A CN201410342217A CN104122535A CN 104122535 A CN104122535 A CN 104122535A CN 201410342217 A CN201410342217 A CN 201410342217A CN 104122535 A CN104122535 A CN 104122535A
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China
Prior art keywords
array
antenna
phased
array antenna
time delay
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Pending
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CN201410342217.0A
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Chinese (zh)
Inventor
谢欢欢
王拓
王耀召
刘卫强
上官红革
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CETC 20 Research Institute
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CETC 20 Research Institute
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Priority to CN201410342217.0A priority Critical patent/CN104122535A/en
Publication of CN104122535A publication Critical patent/CN104122535A/en
Pending legal-status Critical Current

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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
    • 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
    • G01S7/36—Means for anti-jamming, e.g. ECCM, i.e. electronic counter-counter measures
    • 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
    • G01S2013/0236—Special technical features
    • G01S2013/0245—Radar with phased array antenna

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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 provides a true time delay device based phased-array antenna broadband anti-interference method. The true time delay device based phased-array antenna broadband anti-interference method comprises enabling antenna units at a phased-array antenna array edge to be connected with loads and remaining antenna units to be connected with radio frequency assemblies, dividing the remaining antenna units into a plurality of sub-arrays, connecting a true time delay device to the rear of every sub-array, performing unit directional diagram testing through the above phased-array antenna array to obtain a unit electric field directional diagram Eelement (theta) and substituting the unit electric field directional diagram into an array lower minor lobe designing process. The true time delay device based phased-array antenna broadband anti-interference method has the advantages of solving the problems that the traditional phased-array low minor lobe technology is not high and the beam pointing is large in deviation along with frequency variation; improving the broadband anti-interference capability of the phased-array antenna due to the facts that the loads are connected to the array edge units and the true time delay devices are added to the sub-array levels; improving the instantaneous signal bandwidth of the phased-array antenna and improving the surviving capability of a phased-array radar battlefield.

Description

Phased array antenna broadband anti-interference method based on truetimedelay device
Technical field
The present invention relates to phased array antenna Anti-Jamming Technique field, be specially a kind of phased array antenna broadband anti-interference method based on delay device actual time.
Background technology
In order to improve the viability of phased-array radar, the threat that reduces antiradiation missile, minimizing electronic interferences, need phased array antenna to there is good antijamming capability.Phased-array radar is phased array antenna compared with key component, and the low-sidelobe level of realizing phased array antenna can make phased-array radar have good antijamming capability.Common large-scale phased array antenna has aperture transition effect, makes antenna momentary signal narrow bandwidth.And the Sidelobe of common phased array antenna is to utilize array factor to carry out Sidelobe design, there is following problem in such Sidelobe technology:
(1) element factor is used point source substitute, only use array factor to carry out Sidelobe design, do not consider the impact of element factor, make beam shape and the actual beam of design have different, this can affect the Sidelobe performance of phased array antenna.
(2) in the element pattern at common phased array edge and battle array, element pattern difference is very large, can destroy array antenna Sidelobe characteristic, and this is particularly evident in small array.
(3) the aperture transition effect of phased array antenna makes in the frequency outside signal bandwidth, and beam position skew is more, may make maximum beam position towards interference radiating way or attack guided missile direction, has increased the threat of phased array.
Summary of the invention
The object of the invention is for above-mentioned the deficiencies in the prior art, a kind of phased array antenna broadband anti-interference method based on truetimedelay device is provided, use connects the truncation effect at the minimizing phased array edge, additional antenna unit of load, and in Subarray aspect, use truetimedelay device to eliminate the phased array antenna aperture effect in when scanning, realize at lower cost the Sidelobe of phased array antenna, the requirement of anti-broadband interference, be applied to phased array radar system, can effectively promote the viability of phased-array radar.
Technical scheme of the present invention
Described a kind of phased array antenna broadband anti-interference method based on truetimedelay device, is characterized in that: adopt following steps:
Step 1: will connect load in the antenna element of phased array antenna array edges, all the other antenna elements connect radio frequency component;
Step 2: all the other antenna elements are divided into several submatrixs, connect a truetimedelay device after each submatrix;
Step 3: adopt the phased array antenna array in step 1 to carry out element pattern test, obtain unit direction of an electric field figure E element(θ), and by this unit direction of an electric field figure substitution array Sidelobe design process.
Further preferred version, described a kind of phased array antenna broadband anti-interference method based on truetimedelay device, is characterized in that: one or two antenna element in phased array antenna array edges is connect to load.
Further preferred version, described a kind of phased array antenna broadband anti-interference method based on truetimedelay device, is characterized in that: truetimedelay device to the amount of delay of each submatrix be followed successively by 0, τ bn s, 2 τ bn s..., (M-1) τ bn s; Wherein n sfor the antenna element number in each submatrix, τ bfor receiving the time delay of signal between adjacent antenna units, M is submatrix number.
Beneficial effect
The present invention compared with prior art has the following advantages: the invention solves common phased array Sidelobe technology acuracy not high, beam position is with the larger problem of frequency change deviation.By connecing in load, Subarray aspect and increase truetimedelay device in array edges unit, improve the broadband antijamming capability of phased array antenna.This invention can improve the momentary signal bandwidth of phased array antenna simultaneously, promotes the viability in phased-array radar battlefield.
Brief description of the drawings
Fig. 1 front antenna arrangement schematic diagram.
Fig. 2 antenna element is connected block diagram with radio frequency component.
Embodiment
Below in conjunction with specific embodiment, the present invention is described:
The design proposal of the present embodiment is: in array edges, adopt the antenna element that connects load, then according to the requirement of momentary signal bandwidth, all the other antenna elements of array are divided into submatrix, after submatrix passage is synthetic, connect truetimedelay device.Then synthesize by power splitter the receipts/system that is sent to.Wherein the control signal of unit channel and submatrix passage is formed by wave beam control distributor.Above-mentioned phased array antenna array carries out after element pattern test, by the unit direction of an electric field figure E obtaining element(θ) be updated in Sidelobe design process, the result feedback of design, in wave beam control distributor, makes the secondary lobe characteristic of array more accurate, and beam position is less with frequency change, can improve anti-broadband interference and the viability of phased array.
In the present embodiment, array of designs layout as shown in Figure 1, connects load by the Liang Ge unit, edge of antenna array, and in battle array, N-4 unit all connects radio frequency component.This is because directional diagram has larger difference in the element pattern of array edges and battle array, is connect load and does not participate in work, can make the directional diagram of unit in battle array as far as possible consistent.In the time that Sidelobe is comprehensive, first this phased array antenna array is carried out to element pattern test, obtain corresponding unit direction of an electric field figure E element(θ), by the unit direction of an electric field figure E obtaining element(θ) substitution aerial array far field electric Field Calculation formula
E ( θ ) = E element ( θ ) Σ i = 1 N A i e jkid sin ( θ )
Design, instead of use point source design (to think that unit is omnidirectional radiation, E while conventionally designing element(θ)=1), design just can reduce the truncation effect of array edges like this, makes array Sidelobe design effect better.A ithe current amplitude, the k=2 π/λ that are excitation are wave beams, and λ is operation wavelength, and d is unit interval.
As shown in Figure 2, in the present embodiment, each antenna element passage connects limiter, LNA, numerical control phase shift and numerical control decay, then, by a submatrix of 4 antenna element compositions, connects a truetimedelay device, finally by power splitter and and poor comparer output.In large-scale phased array, unit number is many, and maximum diameter of hole is of a size of (N-1) d, and the phase differential of two end units is k (N-1) dsin (θ), and its phase place far exceedes 2 π.Common phased array is used phase shifter, and its maximum phase-shift phase that can realize is 2 π, can not make up its wave path-difference completely, makes the momentary signal narrow bandwidth of array, and when wide-angle scanning, wave beam skew is larger.Truetimedelay device can be realized the amount of delay of more than 10 wavelength, greatly improves momentary signal bandwidth, reduces wave beam side-play amount, improves the anti-broadband interference ability of phased array antenna.In the present embodiment the amount of delay of the each submatrix of broad-band antenna be followed successively by 0, τ bn s, 2 τ bn s..., (M-1) τ bn s; Wherein n sfor the antenna element number in each submatrix, τ bfor receiving the time delay of signal between adjacent antenna units, M is submatrix number,, make the signal between submatrix reach target simultaneously, the momentary signal bandwidth of antenna is improved to M doubly.

Claims (3)

1. the phased array antenna broadband anti-interference method based on truetimedelay device, is characterized in that: adopt following steps:
Step 1: will connect load in the antenna element of phased array antenna array edges, all the other antenna elements connect radio frequency component;
Step 2: all the other antenna elements are divided into several submatrixs, connect a truetimedelay device after each submatrix;
Step 3: adopt the phased array antenna array in step 1 to carry out element pattern test, obtain unit direction of an electric field figure E element(θ), and by this unit direction of an electric field figure substitution array Sidelobe design process.
2. a kind of phased array antenna broadband anti-interference method based on truetimedelay device according to claim 1, is characterized in that: one or two antenna element in phased array antenna array edges is connect to load.
3. a kind of phased array antenna broadband anti-interference method based on truetimedelay device according to claim 1, is characterized in that: truetimedelay device to the amount of delay of each submatrix be followed successively by 0, τ bn s, 2 τ bn s..., (M-1) τ bn s; Wherein n sfor the antenna element number in each submatrix, τ bfor receiving the time delay of signal between adjacent antenna units, M is submatrix number.
CN201410342217.0A 2014-07-17 2014-07-17 True time delay device based phased-array antenna broadband anti-interference method Pending CN104122535A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467371A (en) * 2015-12-03 2016-04-06 中国电子科技集团公司第二十研究所 Amplitude phase calibrating device for semi-closed loop coupled phased array channels
CN109687898A (en) * 2018-11-24 2019-04-26 天津大学 Broadband beams synthesis chip based on active true time delay elements
CN112072309A (en) * 2020-09-03 2020-12-11 中国电子科技集团公司第三十八研究所 Step compensation low-cost phased array antenna framework and design method thereof

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440308A (en) * 1987-02-12 1995-08-08 The Aerospace Corporation Apparatus and method for employing adaptive interference cancellation over a wide bandwidth
CN103812576A (en) * 2014-01-27 2014-05-21 中国电子科技集团公司第十研究所 Comprehensive system of self-adapting anti-interference antenna channel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440308A (en) * 1987-02-12 1995-08-08 The Aerospace Corporation Apparatus and method for employing adaptive interference cancellation over a wide bandwidth
CN103812576A (en) * 2014-01-27 2014-05-21 中国电子科技集团公司第十研究所 Comprehensive system of self-adapting anti-interference antenna channel

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
谢欢欢 等: "基于真实时间延迟技术的相控阵宽带抗干扰方法研究", 《科技论坛》 *
金谋平 等: "一种宽带光控相控阵天线实验系统", 《电子学报》 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105467371A (en) * 2015-12-03 2016-04-06 中国电子科技集团公司第二十研究所 Amplitude phase calibrating device for semi-closed loop coupled phased array channels
CN109687898A (en) * 2018-11-24 2019-04-26 天津大学 Broadband beams synthesis chip based on active true time delay elements
CN112072309A (en) * 2020-09-03 2020-12-11 中国电子科技集团公司第三十八研究所 Step compensation low-cost phased array antenna framework and design method thereof

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