CN201515016U - Novel stop-band slit ultra wide band antenna - Google Patents
Novel stop-band slit ultra wide band antenna Download PDFInfo
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- CN201515016U CN201515016U CN2009202689047U CN200920268904U CN201515016U CN 201515016 U CN201515016 U CN 201515016U CN 2009202689047 U CN2009202689047 U CN 2009202689047U CN 200920268904 U CN200920268904 U CN 200920268904U CN 201515016 U CN201515016 U CN 201515016U
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Abstract
The utility model discloses a novel stop-band slit ultra wide band (UWB) antenna which comprises a polygonal slit antenna and a combined trapped wave structure, namely, a T-shaped micro-band feeder line which is taken as a feed unit is provided with a C-shaped slit, and a micro-band line is added in the polygonal slit, thus forming the combined trapped wave. The polygonal slit antennal can generate the characteristic of the ultra wide band, and adopts the dual-frequency resonance trapped wave structure which is similar to a secondary filter, thus realizing a steeper stop band. Compared with the prior art, the stop-band ultra wide band antennal can realize good filter characteristic, and has the advantages of small size and low cost.
Description
Technical field
The utility model relates to ultra broadband (UWB) antenna, relates in particular to a kind of novel stopband slit UWB antenna.
Background technology
Ultra broadband (UWB) technology starts from the pulse communication technology of rising the sixties in 20th century, utilizes the extremely wide ultrashort pulse of frequency spectrum to communicate, and is called baseband communication, carrierfree communication again, is mainly used in military radar, location and the communication system.In February, 2002, FCC (FCC) has opened the 3.1GHz-10.6GHz frequency range to ultra-wideband communications, and has ratified the UWB technology and be used for civilian; Subsequently, Japan has opened the ultra broadband frequency range in August, 2006.Because the UWB technology has transmission rate height (1Gbit/s), ability of anti-multipath is strong, low in energy consumption, cost is low, penetration capacity is strong, low probability of intercept, with characteristics such as the shared frequency spectrum of existing other wireless communication systems, become the one preferred technique of wireless personal local area network (WPAN) now.Antenna is an indispensable important component part in the super broad band radio communication system as " knowledge " of wireless communication system.As the ultra-wideband antenna of super-broadband tech key, be the key factor of restriction super broad band radio communication channel capacity and quality.The indoor local area network (LAN) low consumption of individual digital communication at a high speed will be the main application of its UWB wireless technology, and its designing requirement to the UWB antenna comprises: impedance ultra broadband, directional diagram ultra broadband and gain ultra broadband, and requirement realizes the miniaturization Design of antenna.On the other hand, the wireless lan (wlan) of 5.15-5.825GHz and the micro-wave access global inter communication of 3.3-3.6GHz narrowband systems communications bands such as (WiMAX) in the frequency range of radio ultra wide band system appointment, have been covered, in order to suppress interference potential between radio ultra wide band system and narrowband systems, usually need in radio ultra wide band system, introduce band stop filter filtering narrow-band, yet this certainly will increase the complexity and the cost of system.A kind of simple but effective method is exactly to make ultra-wideband antenna present bigger reflection coefficient in the frequency range of arrowband, promptly introduces trap function on ultra-wideband antenna, is implemented in the band resistance characteristic in the arrowband frequency band.By introducing slit trap structure, can realize the filter function of UWB antenna.For various plane single pole sub UWB antennas, on the radiation monopole, open an open circuit or a slit, short circuit arrowband, or on the floor, open the open circuit or the finedraw of short circuit, when the frequency of the fundamental resonance pattern in slit, electric current mainly concentrates on around the slit, energy emission is not gone out, thereby has realized filtering characteristic.For the monopole UWB antenna of microstrip feed line, can also on the microstrip feed line limit, introduce the micro-strip resonantor of half-wavelength and realize trap function, the principle of its filtering is similar with the principle of above-mentioned introducing slit filtering.For slit UWB antenna, can be by on microstrip feed line, opening a finedraw, or in the slit, add microstrip line and realize trap characteristic.For example patent name is: have the ultra-wideband antenna (patent No. 200680013917.9) of band resistance characteristic, proposed a kind of single trap characteristic that has, be applied to the antenna of ultra broadband (UWB) communication.This antenna is made up of the oval monopole that has minor matters, and by feed microstrip line.Oval monopole can produce multi resonant and shake in the 3-10.6GHz frequency range, these combination of resonant frequencies have just realized the ultra broadband characteristic together.Simultaneously opened a U-shaped slit on oval monopole, this slit produces a resonance frequency in the 3.1-10.6GHz frequency range, is equivalent to the band stop filter of a single order in parallel on ultra-wideband antenna, thus the generation trap characteristic.And for example: patent name is: the multi-attenuation band ultra-wideband aerial (patent No.: 200810019273.5) that splitting ring resonator coupling feed realizes, a kind of ultra-wideband antenna that is used to have many stopbands is provided, constitute the UWB antenna by microstrip-fed circular monopole antenna, the multi resonant of the using circular monopole characteristic of shaking produces ultra broadband.Realize the line wave energy by the resonant ring that is distributed in the microstrip feed line both sides.For another example: patent name is: based on the improvement attenuation band ultra-wideband aerial (patent No.: 200810019785.1) of asymmetric thorn-like line, a kind of improvement attenuation band ultra-wideband aerial is provided, the radiating element of antenna is a microstrip-fed C shape monopole, produces the ultra broadband characteristic by C shape monopole.Resonance finedraw crack by two 1/4 wavelength of opening on the microstrip feed line produces stopband characteristic.In fact the trap structure that above-mentioned antenna is used is equivalent to add the band stop filter of single order on antenna, the filtering performance of realization is relatively poor, and the steepness of trap is not enough, and bandwidth is narrower, does not reach the filter effect of practical application.Simultaneously, the size of most UWB antenna is greater than 25 * 25mm, and size is bigger, is unfavorable for being applied in the communication terminal of miniaturization.So develop the UWB antenna with good filtering characteristic is the urgent need that adapts to the ultra-wideband communications development.
The utility model content
The purpose of this utility model provides a kind of trap structure that has, stopband is more precipitous, filtering performance is better, the improvement stop band gap ultra wide band antenna that volume is littler, this antenna is by introducing a kind of novel combination trap structure in existing gap ultra wide antenna, solve the not precipitous problem of stopband that existing antenna of the same type produces, the filtering performance of antenna is improved greatly, realized the miniaturization Design of antenna simultaneously again.
For realizing that the purpose of this utility model adopts following technical scheme: a kind of novel stop band gap ultra wide band antenna, it is characterized in that, comprising: rectangle dielectric-slab and the operplate printing antenna that is positioned at rectangle dielectric-slab two sides; Offer article one slit as radiating element in the front of rectangle dielectric-slab, described article one slit is closed curve, and the girth in article one slit is 85～95mm; The T shaped microstrip feeder line that is positioned at the rectangle dielectric-slab back side is as feed element, and the residing position of described T shaped microstrip feeder line upper stage feeder line corresponds to the front of rectangle dielectric-slab, is in the middle and lower part in article one slit delineation scope; The platform feeder line of described T shaped microstrip feeder line top has the second slit that total length is the semi-closed of respective resonant frequencies wavelength 1/2; Be provided with the semi-closed microstrip line that a total length is 1 wavelength of respective resonant frequencies between described article one slit and the described T shaped microstrip feeder line, described microstrip line is near the middle and upper part in article one slit, and opening surrounds T shaped microstrip feeder line down.
In order to realize the utility model better, described T shaped microstrip feeder line is meant the T shaped microstrip feeder line with grading structure.
Described article one slit is circle, ellipse or polygon slit.Described article one slit is a preferred version for the polygon slit, because the polygon slot antenna has more design parameter, can be convenient to adjust to realize the impedance matching of antenna, therefore, can reach the purpose littler by adjusting the size that parameter reduces antenna than slot antenna size of the same type.
Described second slit is meant the C shape slit that Open Side Down; Described C shape slit is positioned at the edge of T shaped microstrip feeder line upper stage feeder line.
The described microstrip line that is arranged between article one slit and the described T shaped microstrip feeder line is meant inverted U-shaped microstrip line.
Operation principle of the present utility model is:
1, the principle of realization ultra broadband is:
The characteristic because the multi resonant in first slit shakes, and its girth is about the pairing wavelength of 3.5GHz, therefore, this slot antenna can produce a plurality of resonance frequencys in 3.1～10.6GHz frequency range, regulate the size of first slit or T shaped microstrip feeder line, make these combination of resonant frequencies together, just produced the ultra broadband characteristic, make the bandwidth of antenna can cover the whole communications band of UWB.
2, realize that the trap principle is:
C shape slit and inverted U-shaped microstrip line can produce a basic resonance frequency respectively, thereby can produce single arrowband trap respectively.When this two combination of resonant frequencies together the time, be equivalent to one or two rank band stop filter, can produce precipitous trap characteristic, improved the filtering performance of antenna.
Compared with prior art, the utlity model has following advantage and beneficial effect:
1. the filter effect of existing trap UWB antenna is poor, and the utility model makes the steepness of trap bigger by introducing the trap structure of combination, and filter effect is better.
2. the polygon slot antenna structure that the utility model proposes, can prolong the resonant path of electric current, and because the polygon slot antenna has more design parameter, can be convenient to adjust to realize the impedance matching of antenna, therefore, can reach the purpose littler by adjusting the size that parameter reduces antenna than slot antenna size of the same type.
Description of drawings
Fig. 1 is the structural representation of the utility model novel stop band gap ultra wide band antenna;
Fig. 2 is the return loss simulation curve that the utility model records when removing the trap structure;
Fig. 3 is the return loss simulation curve that the utility model records;
Fig. 4 a is the directional diagram of the utility model at the E face;
Fig. 4 b is the directional diagram of the utility model at the H face;
Fig. 5 is gain simulation curve figure of the present utility model.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail.
Embodiment
The structure of the utility model novel stop band gap ultra wide band antenna comprises as shown in Figure 1: rectangle dielectric-slab 1 and the operplate printing antenna that is positioned at rectangle dielectric-slab 1 two sides; Have in the front of rectangle dielectric-slab 1 and to be polygonal article one slit 2, article one slit 2 is closed curve, and the girth in article one slit 2 is 90mm, and polygon slit 2 is radiating elements of antenna; Be positioned at rectangle dielectric-slab 1 back side, have the feed element of the T shaped microstrip feeder line 3 of grading structure as antenna, the residing position of T shaped microstrip feeder line 3 upper stage feeder lines corresponds to the front of rectangle dielectric-slab 1, be in the middle and lower part in the 2 delineation scopes of article one slit, above-mentioned radiating element 2 and feed element 3 have been formed the polygon slot antenna, regulate the size of polygon slit 2 or T shaped microstrip feeder line 3, make these combination of resonant frequencies together, just produced the ultra broadband characteristic, record this moment antenna the return loss simulation curve as shown in Figure 2, as seen this polygon slot antenna can produce a plurality of resonance frequencys in 3.1～10.6GHz frequency range, produce the ultra broadband characteristic, the bandwidth of antenna can cover the whole communications band of UWB; Platform above T shaped microstrip feeder line 3 is offered second slit 4, second slit 4 is the C shape slit that Open Side Down, C shape slit is positioned at the edge (at this moment the trap of Chan Shenging is more precipitous) of T shaped microstrip feeder line 3 upper stage feeder lines, and its total length is about 1/2 of respective resonant frequencies 5.3GHz wavelength; Zone total length of engraving between polygon slit 2 and T shaped microstrip feeder line 3 is about the inverted U-shaped microstrip line 5 of a respective resonant frequencies 5.6GHz1 wavelength, and microstrip line 5 is near the middle and upper part in article one slit, and opening surrounds T shaped microstrip feeder line 3 down.So just introduced the combination trap structure of C shape slit and U-shaped microstrip line at this antenna.Because C shape slit and U-shaped microstrip line can produce a basic resonance frequency at 5.3GHz and 5.6GHz respectively.When this two combination of resonant frequencies together the time, be equivalent to one or two rank band stop filter, can produce precipitous trap characteristic, improved the filtering performance of antenna.The return loss simulation curve that record this moment as seen produced trap characteristic in the 5-6GHz frequency range, and stopband is very precipitous, has good filtering characteristic as shown in Figure 3.The E face that records, the directional diagram of H face are shown in Fig. 4 a and Fig. 4 b, and gain simulation curve figure as shown in Figure 5.
The utility model is not limited in the above-mentioned embodiment that provides; those skilled in the art are under design of the present utility model; can make different distortion; for example can there be multiple shape the radiating slot unit; such as circle; oval; rhombus; rectangles etc. are (as long as satisfied the total length requirement of C shape groove and the little band of U-shaped; its concrete shape can be various); anyly do not deviate from the change of being done under spirit of the present utility model and the principle; modify; substitute; combination; simplify; all should be the substitute mode of equivalence, be included within the protection range of the present utility model.
Claims (6)
1. a novel stop band gap ultra wide band antenna is characterized in that, comprising: rectangle dielectric-slab and the operplate printing antenna that is positioned at rectangle dielectric-slab two sides; Offer article one slit as radiating element in the front of rectangle dielectric-slab, described article one slit is closed curve, and the girth in article one slit is 85～95mm; The T shaped microstrip feeder line that is positioned at the rectangle dielectric-slab back side is as feed element, and the residing position of described T shaped microstrip feeder line upper stage feeder line corresponds to the front of rectangle dielectric-slab, is in the middle and lower part in article one slit delineation scope; The platform feeder line of described T shaped microstrip feeder line top has the second slit that total length is the semi-closed of respective resonant frequencies wavelength 1/2; Be provided with the semi-closed microstrip line that a total length is 1 wavelength of respective resonant frequencies between described article one slit and the described T shaped microstrip feeder line, described microstrip line is near the middle and upper part in article one slit, and opening surrounds T shaped microstrip feeder line down.
2. novel stop band gap ultra wide band antenna according to claim 1 is characterized in that, described T shaped microstrip feeder line is meant the T shaped microstrip feeder line with grading structure.
3. novel stop band gap ultra wide band antenna according to claim 1 is characterized in that, described article one slit is circle, ellipse or polygon slit.
4. novel stop band gap ultra wide band antenna according to claim 3 is characterized in that, described article one slit is the polygon slit.
5. novel stop band gap ultra wide band antenna according to claim 1 is characterized in that, described second slit is meant the C shape slit that Open Side Down; Described C shape slit is positioned at the edge of T shaped microstrip feeder line upper stage feeder line.
6. novel stop band gap ultra wide band antenna according to claim 1 is characterized in that, the described microstrip line that is arranged between article one slit and the described T shaped microstrip feeder line is meant inverted U-shaped microstrip line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202689047U CN201515016U (en) | 2009-10-16 | 2009-10-16 | Novel stop-band slit ultra wide band antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202689047U CN201515016U (en) | 2009-10-16 | 2009-10-16 | Novel stop-band slit ultra wide band antenna |
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| Publication Number | Publication Date |
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| CN201515016U true CN201515016U (en) | 2010-06-23 |
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| CN2009202689047U Expired - Lifetime CN201515016U (en) | 2009-10-16 | 2009-10-16 | Novel stop-band slit ultra wide band antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699655B (en) * | 2009-10-16 | 2013-04-10 | 华南理工大学 | Novel stop band gap ultra wide band antenna |
| CN104466399A (en) * | 2013-09-22 | 2015-03-25 | 中兴通讯股份有限公司 | Microstrip antenna, method for filtering out interference signals and mobile terminal |
| CN106972251A (en) * | 2017-04-10 | 2017-07-21 | 合肥工业大学 | A kind of three trap conformal omnidirectional micro-strip array antennas |
| CN107968261A (en) * | 2016-10-25 | 2018-04-27 | 电子科技大学 | Multiband antenna based on planar monopole and substrate integration wave-guide fluting |
-
2009
- 2009-10-16 CN CN2009202689047U patent/CN201515016U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101699655B (en) * | 2009-10-16 | 2013-04-10 | 华南理工大学 | Novel stop band gap ultra wide band antenna |
| CN104466399A (en) * | 2013-09-22 | 2015-03-25 | 中兴通讯股份有限公司 | Microstrip antenna, method for filtering out interference signals and mobile terminal |
| CN104466399B (en) * | 2013-09-22 | 2019-03-05 | 中兴通讯股份有限公司 | Method, the mobile terminal of a kind of microstrip antenna and its filtering interference signals |
| CN107968261A (en) * | 2016-10-25 | 2018-04-27 | 电子科技大学 | Multiband antenna based on planar monopole and substrate integration wave-guide fluting |
| CN106972251A (en) * | 2017-04-10 | 2017-07-21 | 合肥工业大学 | A kind of three trap conformal omnidirectional micro-strip array antennas |
| CN106972251B (en) * | 2017-04-10 | 2019-04-23 | 合肥工业大学 | A kind of three trap conformal omnidirectional micro-strip array antennas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100623 Effective date of abandoning: 20091016 |
|
| RGAV | Abandon patent right to avoid regrant |