CN101640315A - Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure - Google Patents
Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure Download PDFInfo
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- CN101640315A CN101640315A CN200910034787A CN200910034787A CN101640315A CN 101640315 A CN101640315 A CN 101640315A CN 200910034787 A CN200910034787 A CN 200910034787A CN 200910034787 A CN200910034787 A CN 200910034787A CN 101640315 A CN101640315 A CN 101640315A
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Abstract
A dual stop band ultra wide antenna based on asymmetric dual U-shaped defected ground structure is used in wireless communication technical field. The antenna comprises a dielectric plate (1) and metal printed antennae arranged on the two sides of the dielectric plate (1); wherein the front of the dielectric plate (1) is provided with a micro strip feed port (2), a micro strip feeder line (3), a micro strip radiating element (4), the micro strip feeder line (3) is arranged on the central axis of the dielectric plate (1), the upper part of the micro strip feeder line (3) is connected with the micro strip radiating element (4), the lower part of the micro strip feeder line is the micro strip feed port (2); and a ground unit (5) is arranged at the lower part of the back of the dielectric plate (1), and the ground unit (5) is etched with an asymmetric dual U-shaped defected ground structure (6). The invention can effectively cover the frequency band required by FCC, namely 3.1-10.6GHz, andalso can produce two stop bands in the frequency band. The invention has the characteristics of low cost, simple structure and small volume.
Description
Technical field
What the present invention relates to is a kind of ultra-wideband antenna that is applied to wireless communication technology field, and such antenna can solve the problem that wide-band communication system is disturbed by other existing narrow-band communication system signal effectively.
Background technology
In recent years, ultra broadband (UWB) becomes short-distance wireless communication with advantages such as high-performance, low-power consumption and low-cost wireless data communication and has one of technology of competitiveness and development prospect.FCC on February 14 (FCC) in 2002 approval is with the suitable frequency spectrum of 3.1～10.6GHz frequency range division as radio ultra wide band system.How in this frequency range, to realize the ultra broadband characteristic and the miniaturization of antenna, become one of focus of international research.The size of early stage ultra-wideband antenna such as ridge waveguide horn antenna, logarithm periodic antenna etc. is often very big, can not satisfy the requirement of radio ultra wide band system miniaturization.The printed antenna technology that grows up recent years can be dwindled the size of ultra-wideband antenna widely, and it is low to have a cost, is easy to advantages such as design processing, has obtained people's common concern.
Recent years,, design a kind of ultra broadband (UWB) antenna and be very important with stopband function in order to stop of the interference of other narrow-band communication systems to the UWB communication system.Method commonly used is to form stopband at antenna next stage interpolation filter or design work mutually at the antenna of different frequency bands, but this has increased antenna volume, is unfavorable for the system integration; Perhaps load the U type on the radiating element of antenna, V-type or L groove part crack obtain belt-resistance function, but this only provides a stopband usually.
Summary of the invention
Technical problem: the present invention proposes a kind of novel asymmetric double-U-shaped defect ground structure, and use it for the design of dual-attenuation ultra-wideband antenna.By on the antenna ground plate, loading this double-U-shaped defect ground structure, can make antenna produce two stopbands.This antenna has that cost is low, and volume is little, is easy to advantages such as processing and performance are good, can be applied among the radio ultra wide band system transceiver.
Technical scheme: the dual-attenuation ultra-wideband antenna based on asymmetric double-U-shaped defect ground structure that the present invention proposes comprises dielectric-slab and is positioned at the operplate printing antenna of dielectric-slab upper and lower surface, be provided with microstrip-fed port, microstrip feed line, little band radiating element in the front of dielectric-slab, microstrip feed line is positioned on the axis of dielectric-slab, being connected with little band radiating element on the top of microstrip feed line, is microstrip-fed port in the bottom of microstrip feed line; Bottom at the dielectric-slab back side is provided with ground unit, is etched with asymmetric double-U-shaped defect ground structure on the ground unit.
Asymmetric double-U-shaped defect ground structure constitutes by etch double-U-shaped groove on ground unit, and two adjacent arms of U type groove have overlapping, and the length difference of two U type grooves, have opposite angle of inclination.Produce two stopbands of antenna.Ground unit is semicircular distortion, and semi-circular top upwards has a breach in the centre.Little band radiating element is the distortion of semicircular ring, and opening upwards.
Beneficial effect: adopt simple ripe PCB processing technology, under the situation of the constancy of volume that keeps primary antenna, produce dual-attenuation, less (37 * 32 * 0.5mm of the volume of entire antenna by adding asymmetric double-U-shaped defect ground structure
3), be easy to carry out integrated with other circuit.
Description of drawings
Fig. 1 is antenna whole structure figure.Wherein solid line is depicted as Facad structure, and dotted line is depicted as structure.
Fig. 2 is an antenna VSWR test result.
Fig. 3 (a) is an E surface antenna directional diagram test result, and Fig. 3 (b) is a H surface antenna directional diagram test result.
Fig. 4 is the antenna gain test result.
Dielectric-slab 1, microstrip-fed port 2, microstrip feed line 3, little band radiating element 4, ground unit 5, asymmetric double-U-shaped defect ground structure 6, breach 7 are arranged among the figure.
Embodiment
This ultra-wideband antenna comprises the metal level of printed circuit board (PCB) (pcb board) and lower surface fixed thereon.The metal level that is positioned at the pcb board upper surface comprises radiating element and microstrip feed line two parts.Attached to constituting on the microstrip feed line, this structure that is similar to semi-round ring shape can increase the bandwidth of operation of antenna to radiating element effectively by two quadrant rings.
The metal level that is positioned at the pcb board below is a ground level, constitutes microwave circuit with microstrip feed line, and guide electromagnetic waves is propagated toward radiating element.The basic configuration of ground level is that two quadrants add some rectangular elements, the bandwidth of operation of radiating element combination can increasing the greatly antenna of the ground level of this structure and semicircular ring, the target of realization ultra broadband work.In order to maximally utilise the limited size of antenna, expand its bandwidth, increase breach at the top of ground level, this measure can make the bandwidth of operation of antenna further enlarge.The asymmetric double-U-shaped defect ground structure of etching on the metal ground by length and angle of inclination that changes this defect ground structure and the distance that departs from the microstrip feed line cener line, can obtain the dual-attenuation characteristic.
Below in conjunction with accompanying drawing structure of the present invention, function, feature are further specified.
This antenna comprises dielectric-slab 1 and is positioned at the operplate printing antenna on dielectric-slab 1 two sides, it is characterized in that: be provided with microstrip-fed port 2, microstrip feed line 3, little band radiating element 4 in the front of dielectric-slab 1, microstrip feed line 3 is positioned on the axis of dielectric-slab 1, being connected with little band radiating element 4 on the top of microstrip feed line 3, is microstrip-fed port 2 in the bottom of microstrip feed line 3; Bottom at dielectric-slab 1 back side is provided with ground unit 5, is etched with asymmetric double-U-shaped defect ground structure 6 on the ground unit 5.Asymmetric double-U-shaped defect ground structure 6 constitutes by etch double-U-shaped groove on ground unit 5, and two adjacent arms of U type groove have overlapping, and the length difference of two U type grooves, have opposite angle of inclination.
Fig. 1 is the structural representation of existing ultra-wideband antenna, and solid line is depicted as Facad structure, and dotted line is depicted as structure.Dielectric-slab 1 adopts Taconic RF-35 sheet material, and dielectric constant is 3.5, and the thickness of sheet material is 0.5mm.Microstrip-fed port 2 is the input port of energy, joins with the sub-miniature A connector of 50 Ω characteristic impedances.The width of microstrip feed line 3 needs appropriate design, makes the characteristic impedance of feeder line end and sub-miniature A connector be complementary.The combination of radiating element 4 and ground level 5 makes antenna have the characteristics of ultra broadband work, and the asymmetric double-U-shaped defect ground structure 6 on the ground level 5 can make antenna produce the dual-attenuation characteristic.The centre frequency that stopband is adjusted at length that can be by changing asymmetric double-U-shaped defect ground structure 6 and angle of inclination obtains narrower resistance band; Adjust the distance of asymmetric double-U-shaped defect ground structure 6 offset microstrip feeder lines 3 center lines and optimize the standing-wave ratio of antenna at high band.Breach 7 on the ground unit 5 can further increase the bandwidth of operation of antenna.
Referring to Fig. 2, be the test result of antenna VSWR.As we can see from the figure, this antenna has two stopbands in the bandwidth of operation (VSWR＜2) of 2.5～11GHz, be respectively 3.41～4.18GHz and 5.76～6.59GHz (VSWR＞2), and the centre frequency of stopband is respectively 3.8GHz and 6.18GHz.
Referring to Fig. 3, be the actual measurement directional diagram of antenna, chosen three frequency 3.3GHz, 5.5GHz, 8.1GHz, E face directional diagram is the apple shape basically, and the H face is circular substantially, and antenna operating state in whole working band is more stable as can be seen.
Referring to Fig. 4, be the antenna gain of actual measurement, as can be seen, antenna gains very low in stopband, has realized the purpose of other band interference of filtering.
In sum, the present invention can keep the stable of systematic function, and filtering is from the interference signal in other frequency bands under the situation that does not increase system bulk.
Claims (2)
1. dual-attenuation ultra-wideband antenna based on asymmetric double-U-shaped defect ground structure, this antenna comprises dielectric-slab (1) and is positioned at the operplate printing antenna on dielectric-slab (1) two sides, it is characterized in that: be provided with microstrip-fed port (2), microstrip feed line (3), little band radiating element (4) in the front of dielectric-slab (1), microstrip feed line (3) is positioned on the axis of dielectric-slab (1), being connected with little band radiating element (4) on the top of microstrip feed line (3), is microstrip-fed port (2) in the bottom of microstrip feed line (3); Bottom at dielectric-slab (1) back side is provided with ground unit (5), is etched with asymmetric double-U-shaped defect ground structure (6) on the ground unit (5).
2. the dual-attenuation ultra-wideband antenna based on asymmetric double-U-shaped defect ground structure according to claim 1, it is characterized in that: asymmetric double-U-shaped defect ground structure (6) constitutes by etch double-U-shaped groove on ground unit (5), two adjacent arms of U type groove have overlapping, and the length difference of two U type grooves has opposite angle of inclination.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034787A CN101640315A (en) | 2009-09-09 | 2009-09-09 | Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910034787A CN101640315A (en) | 2009-09-09 | 2009-09-09 | Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure |
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| CN101640315A true CN101640315A (en) | 2010-02-03 |
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| CN200910034787A Pending CN101640315A (en) | 2009-09-09 | 2009-09-09 | Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764287A (en) * | 2010-02-23 | 2010-06-30 | 厦门大学 | Notch interdigital printed monopole ultra-wide band antenna |
| CN102110901A (en) * | 2011-03-18 | 2011-06-29 | 电子科技大学 | Time reversal subwavelength array antenna used for wireless mobile terminal |
| CN104143689A (en) * | 2014-07-23 | 2014-11-12 | 天津大学 | Three-frequency antenna used for Bluetooth/RFID/WLAN/WiMAX |
| CN108493589A (en) * | 2018-05-17 | 2018-09-04 | 华南理工大学 | A kind of filter antenna for wearable device |
| CN113764862A (en) * | 2021-09-03 | 2021-12-07 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
-
2009
- 2009-09-09 CN CN200910034787A patent/CN101640315A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101764287A (en) * | 2010-02-23 | 2010-06-30 | 厦门大学 | Notch interdigital printed monopole ultra-wide band antenna |
| CN102110901A (en) * | 2011-03-18 | 2011-06-29 | 电子科技大学 | Time reversal subwavelength array antenna used for wireless mobile terminal |
| CN102110901B (en) * | 2011-03-18 | 2013-05-08 | 电子科技大学 | Time reversal subwavelength array antenna used for wireless mobile terminal |
| CN104143689A (en) * | 2014-07-23 | 2014-11-12 | 天津大学 | Three-frequency antenna used for Bluetooth/RFID/WLAN/WiMAX |
| CN104143689B (en) * | 2014-07-23 | 2016-09-21 | 天津大学 | Three-frequency antenna for bluetooth/RFID/WLAN/WiMAX |
| CN108493589A (en) * | 2018-05-17 | 2018-09-04 | 华南理工大学 | A kind of filter antenna for wearable device |
| CN113764862A (en) * | 2021-09-03 | 2021-12-07 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
| CN113764862B (en) * | 2021-09-03 | 2024-03-01 | 北京有竹居网络技术有限公司 | Antenna and wearable device |
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Application publication date: 20100203 |