CN202121067U - Ultra-wideband antenna with reconfigurable frequency - Google Patents
Ultra-wideband antenna with reconfigurable frequency Download PDFInfo
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- CN202121067U CN202121067U CN2011202250770U CN201120225077U CN202121067U CN 202121067 U CN202121067 U CN 202121067U CN 2011202250770 U CN2011202250770 U CN 2011202250770U CN 201120225077 U CN201120225077 U CN 201120225077U CN 202121067 U CN202121067 U CN 202121067U
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Abstract
The utility model belongs to the antenna technology field and discloses an ultra-wideband antenna with reconfigurable frequency. The ultra-wideband antenna comprises a medium plate, a microstrip feed line, a transition microstrip, a switch controller, a print monopole arranged upon the upper surface of the medium plate, and a feed line ground plate arranged at the lower surface of the medium plate, wherein the print monopole is composed of a plurality of linearly arranged radiating units (with the number being N), with each two adjacent radiating units being connected via an electronic switch; the switch controller is located at the lower surface of the feed line ground plate; and the control line of the switch controller is connected with a plurality of (with the number being N-1) electronic switches for controlling the switch-on and switch-off of the (N-1) electronic switches. The ultra-wideband antenna of the utility model overcomes the defects of the current ultra-wideband antenna and frequency reconfiguring antenna technology, allows the antenna to switch work in the continuous frequency sub-bands (with the number of the sub-bands being N), and is capable of covering ultra-wide frequency band. Meanwhile, the ultra-wideband antenna features gain flat in the ultra-wide frequency band, simple structure, and the like, and can be applied to the stepping frequency ground penetrating radar system and other fields.
Description
Technical field
The utility model belongs to antenna technical field, relates in particular to a kind of ultra-wideband antenna.
Background technology
Step frequency GPR (SFCW-GPR) is the continuous wave GPR of a kind of operating frequency with the step-wise manner stepping.In a scan period, the signal frequency of radar emission is from initial frequency f
StartF progressively rises to the termination frequency f with the frequency interval Δ
StopFor GPR, ultra-wideband antenna is one of its key technology.At present, the ultra-wideband antenna of widespread usage mainly contains in ground penetrating radar system: logarithm periodic antenna, TEM horn antenna, junction type antenna, conical antenna, gradual change slot type antenna etc.These structural antennas can be realized the impedance bandwidth of several octaves; But but there is a common defective, because radiance has the chromatic dispersion characteristics, the high-end and frequency low side for frequency; The electric size of antenna differs greatly; Cause antenna gain and directional diagram obvious with frequency change, the radiation signal waveform distorts, and has a strong impact on the effective identification to detected target.For the step frequency GPR, use this type ultra-wideband antenna, make radar imagery precision and resolution all receive restriction to a great extent, can't in the complicated geological structure, accomplish the detection and the identification of objective body.
In order to overcome the defective that ultra-wideband antenna exists in being applied to the step frequency GPR, can adopt frequency reconfigurable antenna.Frequency reconfigurable antenna is a kind of novel broad-band antenna, through the conversion of its mode of operation, can realize a plurality of frequency subband work.Yet, characteristics of existing frequency reconfigurable antenna ubiquity, not link between the subband can not complete covering full range band, does not have the ultra broadband characteristic.Therefore, frequency reconfigurable antenna can not satisfy the requirement of step frequency GPR.
" Jeen-Sheen Row; Ting-Yi Lin; Frequency-Reconfigurable Coplanar Patch Antenna With Conical Radiation, IEEE Antenna and Wireless Propagation Letters, Vol.9; 2010,1088-1091 " proposed the little band reconfigurable antenna of a kind of coplane ring at document.Utilize the break-make of a plurality of pin diode switches, control being connected of this parasitism annular paster and ground, the physical structure of change radiating element has realized frequency reconfigurable.Not enough is that this antenna can only be accomplished two frequency subband work, so bandwidth is narrower, and required number of switches is more, and structure is comparatively complicated.
In application number 200810202308.9, disclose a kind of reconfigurable antenna, be printed on two annular parasitic radiation unit near the primary radiation paster of this antenna, parasitic element and primary radiation unit concentric.Between the parasitic element and parasitic element and primary radiation unit adopts microwave switch to be connected, utilizes microwave switch to control the size of primary radiation unit, realizes a plurality of frequency subband work.Not enough is the mutual divergence of these a plurality of frequency subbands, so frequency subband can not complete covering ultrabroad band.
Summary of the invention
The purpose of the utility model is in order to solve the problem that existing frequency reconfigurable antenna exists in being applied to the step frequency GPR, having proposed a kind of ultra-wideband antenna of frequency reconfigurable.
The technical scheme of the utility model is: a kind of ultra-wideband antenna of frequency reconfigurable comprises: dielectric-slab, microstrip feed line, the little band of transition, on-off controller and be positioned at printed monopole of dielectric-slab upper surface and be positioned at the feeder line ground plate of dielectric-slab lower surface; The radiating element that said printed monopole is arranged by N line style is formed; Adjacent two radiating elements connect through electronic switch;
Said on-off controller is positioned at the lower surface of feeder line ground plate, and the control line of on-off controller is connected with (N-1) individual electronic switch, is used for controlling the on-off of (N-1) individual electronic switch;
Said microstrip feed line links to each other with printed monopole through the little band of transition, is used to realize the wideband impedance match between microstrip feed line port and printed monopole.
Described electronic switch is PIN switch or micromechanics electronic switch.
Described on-off controller is the multichannel analog device controller, or the digital switch controller.
The beneficial effect of the utility model: the utility model provides a kind of ultra-wideband antenna of frequency reconfigurable.According to the electrical characteristics of monopole, monopole resonance frequency f
0There is corresponding relation with the physical length L of monopole,
(ε
eBe equivalent relative dielectric constant).Through control, can prolong or shorten the physical length of monopole real work, thereby change the sub-resonance frequency of printed monopole (N-1) individual electronic switch on off operating mode.
For a multiple resonance points circuit, each resonance point f
0 iAll corresponding bandwidth of operation Δ f
iThe utility model monopole antenna can equivalence be the multiple resonance points circuit also, by switch control antenna resonance in the different frequency point.When optional one of (N-1) individual switch breaks off and other switch when being communicated with, can form (N-1) and plant the different working pattern, when (N-1) individual switch is communicated with simultaneously, can form N kind mode of operation.Resonance frequency under every kind of mode of operation is respectively f
0 i, a corresponding frequency subband Δ f
i, i=1 wherein, 2,3......N.
Through on-off controller, the timing that can accomplish between this N kind mode of operation is switched.Simultaneously, to the choose reasonable of N radiating element parameter, adjoining subband is connected each other, thereby N frequency subband intactly covers a ultrabroad band, total bandwidth does
In addition, consider that antenna gain G and physical size relation can be expressed as: G=4 π A from the gain angle of antenna
e/ λ
2, wherein, A
eBe the effective aperture of antenna, relevant with physical structure, antenna between different working modes during switch operating, wavelength variations, the also corresponding change of physical structure of antenna simultaneously, its effect is that the gain (directional diagram) of antenna changes less with operation wavelength (frequency).
The ultra-wideband antenna of the frequency reconfigurable that the utility model provides, the resonance frequency of the Combination Control monopole through the different conditions switch makes antenna N continuous frequency subband intra work, realizes the ultra-wideband antenna performance; Secondly, the antenna of the utility model has effectively guaranteed the radiation efficiency in each subband because by the advantage of frequency reconfigurable antenna, physical length changes with operating frequency, therefore flat gain in the full range band, and the directional diagram consistency is better.
Description of drawings
Fig. 1 is ultra-wideband antenna radiating surface (front) structural representation of the frequency reconfigurable of the utility model embodiment.
Fig. 2 is ultra-wideband antenna metal ground plane (back side) structural representation of the frequency reconfigurable of the utility model embodiment.
Fig. 3 is the S11 simulation curve figure of feed port under five kinds of mode of operations of ultra-wideband antenna of frequency reconfigurable of the utility model embodiment.
Embodiment
Below in conjunction with accompanying drawing and concrete embodiment the utility model is further described.
A kind of ultra-wideband antenna of frequency reconfigurable; Extremely shown in Figure 2 like Fig. 1; Comprise: it is little with 7, four electronic switches 8,9,10,11 be positioned at the feeder line ground plate 13 at the dielectric-slab back side to be positioned at the first positive radiating element 1 of dielectric-slab 12, second radiating element 2, the 3rd radiating element 3, the 4th radiating element 4, the 5th radiating element 5, microstrip feed line 6, transition, and dielectric-slab is positioned at the centre of entire antenna.Here, first radiating element 1, second radiating element 2, the 3rd radiating element 3, the 4th radiating element 4 and the 5th radiating element 5 have been formed printed monopole.
Said radiating element 1,2,3,4,5 is the rectangular metal paster, and width is consistent, is uneven in length, and line style is arranged on the broadside center line in dielectric-slab 12 fronts; Leave the gap between two adjacent radiating elements, be respectively applied for electronic switch 8,9,10,11 is installed.
Said first electronic switch 8 is between first radiating element 1 and second radiating element 2; Second electronic switch 9 is between second radiating element 2 and the 3rd radiating element 3; The 3rd electronic switch 10 is between the 3rd radiating element 3 and the 4th radiating element 4, and quadrielectron switch 11 is between the 4th radiating element 4 and the 5th radiating element 5.
Said microstrip feed line 6 is positioned on the broadside center line in dielectric-slab 12 fronts, and characteristic impedance is 50 Ω; One end is as antenna current feed port; The other end joins through little 7 and first radiating element 1 of being with of transition, realizes the ultra broadband impedance matching to radiating element.In the present embodiment, the little band of transition is the little band of trapezoidal transition.
Connect through first electronic switch 8 between said first radiating element 1 and second radiating element 2; Connect through second electronic switch 9 between second radiating element 2 and the 3rd radiating element 3; Connect through the 3rd electronic switch 10 between the 3rd radiating element 3 and the 4th radiating element 4, connect through quadrielectron switch 11 between the 4th radiating element 1 and the 5th radiating element 5.
Here, dielectric-slab 12 is a rectangular slab, and feeder line ground plate 13 is a rectangular metal sheet, is printed on dielectric-slab 12 back sides, and is relative up and down with microstrip feed line 6.
When optional one of four electronic switches 8,9,10,11 break off and other three when connecting, can form the mode of operation of four kinds of different operating frequencies; When four switches 8,9,10,11 are all connected, can form another kind of mode of operation.Can adopt on-off controller, four switch on and off states are rationally controlled, accomplish the switching between five kinds of mode of operations.
Here, four electronic switches 8,9,10,11 can adopt the PIN switch, also can adopt micromechanics electronics (MEMS) switch; On-off controller can adopt the multichannel analog device controller, guarantees the independent control to each passage, also can adopt the digital switch controller, guarantees each passage is independently controlled through coding.
In the present embodiment, concrete relevant parameter is: dielectric-slab size 12 is 100mm * 60mm, and thickness is 1mm, and the medium relative dielectric constant is 2.2; Five rectangular radiation unit 1,2,3,4,5 width are 2mm, and length is respectively: 37mm, 4mm, 5mm, 6mm, 7mm; The spacing of adjacent two rectangular patches is 2mm; Microstrip feed line 6 length are 28mm, and wide is 3mm; Ground plate 13 is of a size of 60mm * 30mm; The little 7 long 2mm that are with of trapezoidal transition.Under the situation of confirming above-mentioned relevant parameter, through Electromagnetic Simulation, the attainable 5 kinds of mode of operations of this antenna are as shown in table 1:
Table 1
| Mode of | Switch | 8 | |
|
|
Working sub-band (GHz) |
| Pattern 1 | Logical | Logical | Logical | Logical | 1.000～1.140 | |
| |
Logical | Logical | Logical | Disconnected | 1.120～1.280 | |
| |
Logical | Logical | Disconnected | Logical | 1.250～1.430 | |
| |
Logical | Disconnected | Logical | Logical | 1.400～1.610 | |
| |
Disconnected | Logical | Logical | Logical | 1.550～1.810 |
The S11 simulation curve of the ultra-wideband antenna of the utility model embodiment feed port under five kinds of mode of operations is as shown in Figure 3; As can be seen from the figure: with S11-the 10dB value is reference; Under five mode of operations, all distinguish corresponding five frequency subbands; And adjacent sub-bands interlinks, can ultra broadband frequency band of complete covering, and its total relative bandwidth is 58%.
The ultra-wideband antenna of the frequency reconfigurable that the utility model provides can be used as dual-mode antenna; Overcome the deficiency of existing ultra-wideband antenna and frequency reconfigurable antenna technology; Can work in a plurality of continuous frequency subbands, be connected each other between the subband, can cover ultrabroad band; Also have flat gain, directional diagram high conformity, characteristic of simple structure in ultrabroad band simultaneously; And can increase the multi-frequency subband through increasing the sub rectangular patch number of printed monopole and the number of switch, expand the beamwidth of antenna.The ultra-wideband antenna of the utility model can be applied to fields such as step frequency ground penetrating radar system.
Those of ordinary skill in the art will appreciate that embodiment described here is in order to help the principle of reader understanding's the utility model, should to be understood that the protection range of the utility model is not limited to such special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combinations that do not break away from the utility model essence according to disclosed these teachings of the utility model, and these distortion and combination are still in the protection range of the utility model.
Claims (6)
1. the ultra-wideband antenna of a frequency reconfigurable is characterized in that, comprising: dielectric-slab, microstrip feed line, the little band of transition, on-off controller and be positioned at printed monopole of dielectric-slab upper surface and be positioned at the feeder line ground plate of dielectric-slab lower surface; The radiating element that said printed monopole is arranged by N line style is formed; Adjacent two radiating elements connect through electronic switch;
Said on-off controller is positioned at the lower surface of feeder line ground plate, and the control line of on-off controller is connected with N-1 electronic switch, is used to control the on-off of N-1 electronic switch;
Said microstrip feed line links to each other with printed monopole through the little band of transition, is used to realize the wideband impedance match between microstrip feed line and printed monopole.
2. the ultra-wideband antenna of frequency reconfigurable according to claim 1 is characterized in that, described electronic switch is PIN switch or micromechanics electronic switch.
3. the ultra-wideband antenna of frequency reconfigurable according to claim 1 and 2 is characterized in that, described on-off controller is the multichannel analog device controller, or the digital switch controller.
4. the ultra-wideband antenna of frequency reconfigurable according to claim 3 is characterized in that, a said N radiating element is the rectangular metal paster.
5. according to the ultra-wideband antenna of claim 3 or 4 described frequency reconfigurables, it is characterized in that the little band of described transition is the little band of trapezoidal transition.
6. the ultra-wideband antenna of frequency reconfigurable according to claim 5 is characterized in that, described dielectric-slab is a rectangular slab.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202250770U CN202121067U (en) | 2011-06-29 | 2011-06-29 | Ultra-wideband antenna with reconfigurable frequency |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202250770U CN202121067U (en) | 2011-06-29 | 2011-06-29 | Ultra-wideband antenna with reconfigurable frequency |
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|---|---|
| CN202121067U true CN202121067U (en) | 2012-01-18 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306870A (en) * | 2011-06-29 | 2012-01-04 | 电子科技大学 | Ultra wide band antenna with reconfigurable frequency |
| CN102544713A (en) * | 2012-02-24 | 2012-07-04 | 重庆信科设计有限公司 | Frequency-reconfigurable ultra broad band antenna based on planar bi-layer section electromagnetic slit structure |
| CN103545616A (en) * | 2013-11-06 | 2014-01-29 | 中国计量学院 | Narrow-band microstrip antenna with U-shaped notch |
| CN106207471A (en) * | 2016-08-29 | 2016-12-07 | 苏州市吴通天线有限公司 | A kind of antenna system selected based on user |
| CN106252854A (en) * | 2016-09-29 | 2016-12-21 | 努比亚技术有限公司 | A kind of antenna and mobile terminal |
| CN107706525A (en) * | 2017-09-07 | 2018-02-16 | 云南靖创液态金属热控技术研发有限公司 | A kind of reconfigurable antenna |
| CN112216991A (en) * | 2020-09-15 | 2021-01-12 | 南京航空航天大学 | Two-way frequency reconfigurable microstrip antenna |
| CN112216992A (en) * | 2020-09-15 | 2021-01-12 | 南京航空航天大学 | Two-way type frequency reconfigurable meander line antenna |
-
2011
- 2011-06-29 CN CN2011202250770U patent/CN202121067U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102306870A (en) * | 2011-06-29 | 2012-01-04 | 电子科技大学 | Ultra wide band antenna with reconfigurable frequency |
| CN102544713A (en) * | 2012-02-24 | 2012-07-04 | 重庆信科设计有限公司 | Frequency-reconfigurable ultra broad band antenna based on planar bi-layer section electromagnetic slit structure |
| CN102544713B (en) * | 2012-02-24 | 2013-11-06 | 重庆信科设计有限公司 | Frequency-reconfigurable ultra broad band antenna based on planar bi-layer section electromagnetic slit structure |
| CN103545616A (en) * | 2013-11-06 | 2014-01-29 | 中国计量学院 | Narrow-band microstrip antenna with U-shaped notch |
| CN103545616B (en) * | 2013-11-06 | 2017-01-11 | 中国计量学院 | Narrow-band microstrip antenna with U-shaped notch |
| CN106207471A (en) * | 2016-08-29 | 2016-12-07 | 苏州市吴通天线有限公司 | A kind of antenna system selected based on user |
| CN106252854A (en) * | 2016-09-29 | 2016-12-21 | 努比亚技术有限公司 | A kind of antenna and mobile terminal |
| CN106252854B (en) * | 2016-09-29 | 2019-05-24 | 努比亚技术有限公司 | A kind of antenna and mobile terminal |
| CN107706525A (en) * | 2017-09-07 | 2018-02-16 | 云南靖创液态金属热控技术研发有限公司 | A kind of reconfigurable antenna |
| CN112216991A (en) * | 2020-09-15 | 2021-01-12 | 南京航空航天大学 | Two-way frequency reconfigurable microstrip antenna |
| CN112216992A (en) * | 2020-09-15 | 2021-01-12 | 南京航空航天大学 | Two-way type frequency reconfigurable meander line antenna |
| CN112216991B (en) * | 2020-09-15 | 2022-02-22 | 南京航空航天大学 | Two-way frequency reconfigurable microstrip antenna |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20140629 |
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| EXPY | Termination of patent right or utility model |