CN208723104U - A kind of S-band ultra-wideband through-wall radar antenna - Google Patents
A kind of S-band ultra-wideband through-wall radar antenna Download PDFInfo
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- CN208723104U CN208723104U CN201821623860.0U CN201821623860U CN208723104U CN 208723104 U CN208723104 U CN 208723104U CN 201821623860 U CN201821623860 U CN 201821623860U CN 208723104 U CN208723104 U CN 208723104U
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- medium substrate
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- main radiator
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Abstract
The utility model discloses a kind of S-band ultra-wideband through-wall radar antenna, including transmitting antenna and receiving antenna, the transmitting antenna and receiving antenna are symmetrically disposed on radar both ends；The transmitting antenna is identical with receiving antenna structure；The transmitting antenna includes that medium substrate and single side are covered in the main radiator on medium substrate, and covers the metal in medium substrate its another side, and through the feed line being installed on medium substrate；The metal its bottom is connected with medium substrate；The feed line is a coaxial line, and its outer conductor with metal connects, and inner conductor connects after passing through medium substrate with main radiator；The S-band ultra-wideband through-wall radar antenna of the utility model can not only solve the problems such as antenna structure is complicated, size is big, beam angle is narrow in the prior art, moreover it is possible to improve the isolation of dual-mode antenna under the requirement for meeting Through-Wall Radar System overall dimension.
Description
Technical field
The utility model relates to a kind of S-band ultra-wideband through-wall radar antennas, belong to radar and field of communication technology.
Background technique
Radar (Radar) etymology is in radio detection and measurement distance (Radio Detection and Ranging)
English abbreviation, radar it is most essential application be exactly detect target presence or absence and detection target distance.Through-wall radar is made
For wherein more classical application, it can penetrate nonmetallic wall, carry out to the target of the static of behind walls or movement
Detection, positioning and tracking, to largely improve the perception detection under the complex environments such as life rescue and struggle against terror
Ability；Federal Communication committee member (FCC, Federal Communications Commission) defines ultra-broadband signal
Relative bandwidth (the ratio between signal bandwidth and centre frequency) is greater than 20% or signal of the three dB bandwidth not less than 500MHz；Ultra wide band wave
The advantages of shape radar is exactly the scattering signatures that can obtain different size object, i.e., relative to narrow band signal radar, possesses higher
Target detection and identification ability.
Important component of the antenna as radar system, therefore through-wall radar antenna is had also been made largely both at home and abroad
Work；Mainly have: University of Tennessee, the U.S. devises two different types of Vivaldi antenna array applied to ultra-broadband wall-through
Radar system, the first is the GHz of 8 GHz ~ 12 of Unit 16 × 16 to clock slot antenna；Second is the 2 of Unit 8
The Vivaldi antenna of the GHz of GHz ~ 4；Colleges and universities, Turkey are applied to ultra-broadband wall-through radar using printing broadband slot antenna battle array
System, it is the GHz of 2.73 GHz ~ 10.93 which, which realizes bandwidth, which is the mm of 76mm × 54；Belgium one
University, institute designs wearable Doppler's Through-Wall Radar System, and the antenna which uses is microstrip patch antenna array, adopts
Frequency is 2.35GHz, which realizes ± 15 scanning angles by beam scanning；Chinese University of Science and Technology's design is a
Applied to IR-UWB(Impulse Radio-Ultra Wide Band) through-wall detection radar butterfly antenna, the antenna
The bandwidth range of S11 parameter is the GHz of 0.8 GHz ~ 2.3, by adding reflector to realize 120 ~ 145 in bandwidth range
Big wave beam, the antenna size be the mm of 315 mm × 152；However, these antenna is big there are size or structure is complicated, manufacture
Difficulty, it is impossible to meet the requirements that individual soldier holds through-wall radar antenna；The S-band ultra-wideband through-wall radar antenna of the utility model
Design uses U-shaped grooving method, and the mesh of broadening frequency band and minification has been finally reached in combination with earth plate grooving techniques
's.
Utility model content
A kind of in order to solve the above problems, the utility model proposes S-band ultra-wideband through-wall radar antenna, it is through walls meeting
Under the requirement of radar system overall dimension, it can not only solve that antenna structure in the prior art is complicated, size is big, beam angle is narrow
The problems such as, moreover it is possible to improve the isolation of dual-mode antenna.
The S-band ultra-wideband through-wall radar antenna of the utility model, including transmitting antenna and receiving antenna, the transmitting day
Line and receiving antenna are symmetrically disposed on radar both ends, and respectively with respect to radar 130mm；The transmitting antenna and receiving antenna structure
It is identical；The transmitting antenna includes that medium substrate and single side are covered in the main radiator on medium substrate, and are covered in medium base
The metal of its another side of plate, and through the feed line being installed on medium substrate；
The medium substrate is the bottom plate of rectangular parallelepiped structure；
The main radiator is the rectangular metal patch that a center offers U-type groove；Its slot brachium of the U-type groove and main spoke
Its narrow side of beam is parallel, its slot arm bottom of U-type groove is parallel with its long side of main radiator；
It is to the metal aluminium sheet of a rectangular configuration；The metal its bottom is connected with medium substrate；
The feed line is a coaxial line, and its outer conductor with metal connects, inner conductor pass through after medium substrate and
Main radiator connects；Its inner conductor of the feed line and main radiator junction are located at its opening of U-type groove, thus electromagnetic radiation
Wave carries out the transmitting and reception of signal；
The metal its short side of its long side, medium substrate and its short side of main radiator it is parallel to each other, metal ground its
Its long side of short side, medium substrate and its long side of main radiator are parallel to each other.
As preferred embodiment, the medium substrate is made of Arlon-AD1000 material, and its dielectric constant is
4.4, loss tangent 0.02；The medium substrate its with a thickness of 4.3mm, long side 33mm, narrow side 24mm.
As preferred embodiment, its inner conductor radius of the feed line is 0.415mm, and outer conductor radius is
2.66mm。
Further, its center of the feed line is located at main radiator center and deviates its slot arm bottom of U-type groove direction 0.2mm
Place.
As preferred embodiment, its long side of the main radiator be 26.8mm, broadside 18.8mm, with a thickness of 18 to
25um, that is, covering the metal layer thickness on medium substrate is 18 to 25um.
As preferred embodiment, its slot of U-type groove brachium 10.86mm, slot arm bottom 9.82mm, slot arm slit width
0.79mm。
As preferred embodiment, the metal its with a thickness of 1mm, long side 33mm, width 37mm.
Compared with prior art, the S-band ultra-wideband through-wall radar antenna of the utility model, feed line
The parameter optimization Combination Design of feed is easy to process with integrating external component, and is easy to implement from feed line to main radiator it
Between impedance regulation；Half-power beam width improves the scanning angle range of through-wall radar at 104 ° or more；Feed line and master
The parameter optimization Combination Design of radiator broadens impedance bandwidth under the premise of guaranteeing broad beam, so that 3 to 3.5GHz full frequency band
Energy be fully used；By the parameter optimization Combination Design to U-type groove structure and main radiator and metal ground, reduce
Antenna overall dimensions improve the consistency and stability of far-field pattern in ultra wide band range, prevent high band directional diagram
Division and deflecting situation；Receiving antenna and transmitting antenna are placed using same polarization, at a distance of 130mm, effectively increase receiving antenna
With the isolation of transmitting antenna so that 3 to 3.5GHz isolation between antennas be lower than -28.116dB.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the utility model.
Fig. 2 is the overlooking structure diagram of the transmitting antenna of the utility model.
Fig. 3 is the present invention looks up structural representation of the transmitting antenna of the utility model.
Fig. 4 is the side structure schematic view of the transmitting antenna of the utility model.
Fig. 5 is the B-B schematic cross-sectional view of the utility model.
Fig. 6 is the standing-wave ratio test schematic diagram of the utility model.
Fig. 7 is the measured result schematic diagram of each frequency point normalized radiation pattern of the utility model.
Fig. 8 is the isolation degree test schematic diagram of the utility model.
Each component mark in attached drawing are as follows: A- transmitting antenna, B- receiving antenna, 1- medium substrate, 2- main radiator, 3- metal
Ground, 4- feed line, 5-U type groove.
Specific embodiment
S-band ultra-wideband through-wall radar antenna as shown in Figures 1 to 5, including transmitting antenna A and receiving antenna B, it is described
Transmitting antenna A and receiving antenna B are symmetrically disposed on radar both ends, and respectively with respect to radar 130mm；It the transmitting antenna A and connects
It is identical to receive antenna B structure；The transmitting antenna A includes that medium substrate 1 and single side are covered in the main radiator on medium substrate 1
2, and cover in 2 its another side of medium substrate metal 3, and through the feed line 4 being installed on medium substrate 2；
The medium substrate 1 is the bottom plate of rectangular parallelepiped structure；
The main radiator 2 is the rectangular metal patch that a center offers U-type groove 5；Its slot brachium of the U-type groove 5 with
Its narrow side of main radiator 2 is parallel, its slot arm bottom of U-type groove 5 is parallel with its long side of main radiator 2；
The metal 3 be a rectangular configuration aluminium sheet；The metal 3 its bottom is connected with medium substrate 1；
The feed line 4 is a coaxial line, and its outer conductor with metal 3 connects, and inner conductor is after medium substrate 1
Connect with main radiator 2；Described its inner conductor of feed line 4 and 2 junction of main radiator are located at its opening of U-type groove 5, thus spoke
Radio magnetic wave carries out the transmitting and reception of signal；
The metal 3 its long side, its short side of medium substrate 1 and its short side of main radiator 2 it is parallel to each other, the metal
3 its short side, its long side of medium substrate 1 and its long side of main radiator 2 are parallel to each other.
The medium substrate 1 is made of Arlon-AD1000 material, and its dielectric constant is 4.4, and loss tangent is
0.02；The medium substrate 1 its with a thickness of 4.3mm, long side 33mm, narrow side 24mm.
Its inner conductor radius of the feed line 4 is 0.415mm, and outer conductor radius is 2.66mm.
Described its center of feed line 4 is located at 2 center of main radiator and deviates at the direction 0.2mm of its slot arm bottom of U-type groove 5.
Described its long side of main radiator 2 is 26.8mm, broadside 18.8mm, with a thickness of 18 to 25um.
Its slot of the U-type groove 5 brachium 10.86mm, slot arm bottom 9.82mm, slot arm slit width 0.79mm.
The metal 3 its with a thickness of 1mm, long side 33mm, width 37mm.
The S-band ultra-wideband through-wall radar antenna of the utility model, medium substrate use 33mm × 24mm × 4.2mm length
Cube model has reasonably selected Arlon (AD1000) substrate material that dielectric constant is 4.4 to reduce the overall dimension of antenna
Material；Main radiator uses the rectangular metal patch of 26.8mm × 18.8mm, for the overall dimension for reducing antenna, while extended antenna
Bandwidth of operation, cover upper 18 in the medium substrate with a thickness of 4.2mm its medium layer plane and paste to the metal radiation of 25um thickness
Piece, and U-type groove is opened on metal radiation patch；In order to enhance the directionality of aerial radiation, while reducing the overall dimension of antenna,
The bottom of medium substrate with placed 37mm × 33mm × 1mm metal made of aluminium sheet；
Make the parameter variation for determining characteristic impedance simple as feed line using coaxial line, if the size of medium substrate and
Electromagnetic parameter determines that then the position of the internal and external conductor radius size of coaxial line and coaxial line codetermines the characteristic resistance of feed line
Anti-, this is easy to regulate and control and realize the impedance matching in broadband, in order to connect 50 Ω coaxial lines of external perimysium reference, the characteristic resistance of feed line
It is anti-to be designed as 50 Ω；U-type groove structure is opened in main radiator, so that antenna generates two resonance points, to improve the work of antenna
Bandwidth, as shown in fig. 6, carry out standing-wave ratio test to the S-band ultra-wideband through-wall radar antenna of the utility model, realize 3 to
The standing-wave ratio of 3.5GHz band antenna takes full advantage of the energy of the frequency range less than 2, reduces the energy loss of full frequency band；It is main
The cooperation on radiator and metal ground solves the stability and consistency of far-field pattern in broadband range, the directional diagram of high band
There is the problem of division and deflecting；Direction is normalized to each frequency point of the S-band ultra-wideband through-wall radar antenna of the utility model
Figure is surveyed, and measured result is as shown in fig. 7, the consistency of far-field pattern is preferable and undistorted situation, test obtain
The half-power beam width of tri- frequency points of 3GHz, 3.25GHz and 3.5GHz realizes broad beam design, mentions at 104 ° or more
The high scanning angle range of through-wall radar；In addition, as shown in figure 8, S-band ultra-wideband through-wall radar day to the utility model
Line carries out isolation degree test, and dual-mode antenna is placed using same polarization, at a distance of 130mm, effectively increases the isolation of dual-mode antenna,
3 are realized to 3.5GHz isolation between antennas lower than -28.116dB.
Above-described embodiment is only the better embodiment of the utility model, therefore all according to the utility model patent application range
The equivalent change or modification that the structure, feature and principle is done, is included in the scope of the utility model patent application.
Claims (7)
1. a kind of S-band ultra-wideband through-wall radar antenna, including transmitting antenna and receiving antenna, it is characterised in that: the transmitting
Antenna and receiving antenna are symmetrically disposed on radar both ends, and respectively with respect to radar 130mm；The transmitting antenna and receiving antenna knot
Structure is identical；The transmitting antenna includes that medium substrate and single side are covered in the main radiator on medium substrate, and cover Yu Jiezhi
The metal of its another side of substrate, and through the feed line being installed on medium substrate；
The medium substrate is the bottom plate of rectangular parallelepiped structure；
The main radiator is the rectangular metal patch that a center offers U-type groove；Its slot brachium of the U-type groove and main radiator
Its narrow side is parallel, its slot arm bottom of U-type groove is parallel with its long side of main radiator；
It is to the metal aluminium sheet of a rectangular configuration；The metal its bottom is connected with medium substrate；
The feed line is a coaxial line, and its outer conductor with metal connects, inner conductor after medium substrate with main spoke
Beam connects；Its inner conductor of the feed line and main radiator junction are located at its opening of U-type groove；
The metal its short side of its long side, medium substrate and its short side of main radiator it is parallel to each other, the metal its short side,
Its long side of medium substrate and its long side of main radiator are parallel to each other.
2. S-band ultra-wideband through-wall radar antenna according to claim 1, it is characterised in that: the medium substrate by
Arlon-AD1000 material is made, and its dielectric constant is 4.4, loss tangent 0.02；Its thickness of the medium substrate
For 4.3mm, long side 33mm, narrow side 24mm.
3. S-band ultra-wideband through-wall radar antenna according to claim 1, it is characterised in that: the feed line is led in it
Body radius is 0.415mm, and outer conductor radius is 2.66mm.
4. S-band ultra-wideband through-wall radar antenna according to claim 1 or 3, it is characterised in that: the feed line is wherein
The heart is located at main radiator center and deviates at the direction 0.2mm of its slot arm bottom of U-type groove.
5. S-band ultra-wideband through-wall radar antenna according to claim 1, it is characterised in that: its length of the main radiator
While being 26.8mm, broadside 18.8mm, with a thickness of 18 to 25um.
6. S-band ultra-wideband through-wall radar antenna according to claim 1, it is characterised in that: its slot brachium of the U-type groove
10.86mm slot arm bottom 9.82mm, slot arm slit width 0.79mm.
7. S-band ultra-wideband through-wall radar antenna according to claim 1, it is characterised in that: its thickness of metal ground
For 1mm, long side 33mm, width 37mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623860.0U CN208723104U (en) | 2018-10-08 | 2018-10-08 | A kind of S-band ultra-wideband through-wall radar antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821623860.0U CN208723104U (en) | 2018-10-08 | 2018-10-08 | A kind of S-band ultra-wideband through-wall radar antenna |
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| Publication Number | Publication Date |
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| CN208723104U true CN208723104U (en) | 2019-04-09 |
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| CN201821623860.0U Active CN208723104U (en) | 2018-10-08 | 2018-10-08 | A kind of S-band ultra-wideband through-wall radar antenna |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381164A (en) * | 2021-04-08 | 2021-09-10 | 上海磐启微电子有限公司 | Back-feed coupling WIFI antenna |
-
2018
- 2018-10-08 CN CN201821623860.0U patent/CN208723104U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113381164A (en) * | 2021-04-08 | 2021-09-10 | 上海磐启微电子有限公司 | Back-feed coupling WIFI antenna |
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