CN104409841A - Broadband slot antenna - Google Patents
Broadband slot antenna Download PDFInfo
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- CN104409841A CN104409841A CN201410698895.0A CN201410698895A CN104409841A CN 104409841 A CN104409841 A CN 104409841A CN 201410698895 A CN201410698895 A CN 201410698895A CN 104409841 A CN104409841 A CN 104409841A
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Abstract
The invention discloses a broadband slot antenna. The antenna comprises a plate-shaped dielectric substrate, a strip-shaped feed element, a base and an antenna radiating element. The strip-shaped feed element is formed by metal foil of the upper surface of the substrate, the base is formed by metal foil of the lower surface of the substrate, and the antenna radiating element is formed by slotting in the base. The antenna radiating element comprises an invented-C-shaped slot and at least one first vertical sub slot positioned inside the invented-C-shaped slot. The 10dB broadband slot antenna with superior performance and with return loss ranging from 1.5GHz to 4.8GHz is designed by means of the phase step impedance sub slots and the half-wavelength slot, five resonance modes can be generated to broaden operation bandwidth of the antenna, and thus, the broadband slot antenna is applicable to the fields of broadband communication and multi-system communication.
Description
Technical field
The present invention relates to the antenna technical field of radio mobile communication, particularly a kind of wide-band slot antenna.
Background technology
In recent years, wireless communication technology develops rapidly, the demand of people to radio communication service increases day by day, many wireless terminals, as mobile phone, panel computer etc., all wish energy compatible multiple different communication standard during design, such as 2G, 3G, 4G, Wifi etc., therefore the antenna being responsible for radiation and Received signal strength just requires the ability to work possessing multiband or wide-band, and multiband studies comparative maturity at present, but wide-band still has very large development space.
Slot antenna, comparatively commonly Waveguide slot antenna and microstrip slot antenna, because having coplanar structure small in volume and being easy to the good nature integrated with other components and parts, microstrip slot antenna is usually used on intelligent mobile terminal.And current slot antenna still faces the narrow problem of working frequency range, the slot antenna therefore designing a wide-band becomes particularly important.
The wide-band slot antenna of data display, the structure chart of this wide-band slot antenna as shown in Figure 1, specifically please refer to " number of patent application: 200880000579.4, patent name: wide-band slot antenna, patentee: villous themeda open country is great ".Fig. 1 display be a kind of structure of wide-band slot antenna that this patent proposes, the wide-band slot antenna that patent proposes is formed primarily of 1/2nd wavelength slot and feed structure, this patent antenna has wider bandwidth of operation, whole ultra wideband frequency (3.1GHz ~ 10.6GHz) can be covered, but lower than the frequency range of 3GHz not in this Antenna Operation scope, if therefore utilize the antenna of a low-frequency range of this Patent design to there is more uncertainty.
The slot antenna of data display, the structure chart of this slot antenna as shown in Figure 2, specifically please refer to " number of patent application: 200810086973.6, patent name: slot antenna, patentee: Jin Yigui, golden Britain and Japan, Zheng Changyuan ".Fig. 2 display be a kind of structure of slot antenna that this patent proposes, the slot antenna that this patent proposes primarily of ribbon feed element, and antenna element (being formed by ground two the sub-gaps be connected to form in substrate) form, its major advantage is that the area that antenna takies is little, but working frequency range is narrower, the work of many communication standards cannot be met.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, propose a kind of wide-band slot antenna.This wide-band slot antenna is by the improvement to conventional microstrip slot antenna, uniform impedance gap is become Stepped Impedance gap, achieve the control to antenna resonance pattern, on this basis, by introducing many discrete gap, successfully introduce an extra mode of resonance, expand the bandwidth of operation of antenna.
Object of the present invention is achieved through the following technical solutions:
A kind of wide-band slot antenna, described wide-band slot antenna comprises:
The ground 120 that the ribbon feed element 110 that plate-like dielectric substrate 100, substrate 100 upper surface metal forming are formed, substrate 100 lower surface metal paper tinsel are formed and the radiating element of antenna 130 cracking in ground 120 and formed,
Wherein, radiating element of antenna 130 comprises the first vertical sub-gap 136 that an anti-C groove part gap and at least one is positioned at anti-C groove part gap inside.
Preferably, the composition of described anti-C groove part gap comprises the first sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133, the 4th sub-gap 134, the 5th sub-gap 135,
Wherein, the first sub-gap 131, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the second sub-gap 132;
5th sub-gap 135, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the 4th sub-gap 134;
3rd sub-gap 133, the inside that its first end is formed in ground is in line with second end in the second sub-gap 132 and is connected, and the inside that its second end is formed in ground is in line with second end in the 4th sub-gap 134 and is connected.
Preferably, described first sub-gap 131 is identical with the 5th sub-gap 135, the second sub-gap 132 is identical with the 4th sub-gap 134, makes anti-C groove part gap form laterally zygomorphic structure.
Preferably, described first sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133 are different, form the sub-gap of Stepped Impedance, realize the control of the mode of resonance to described wide-band slot antenna.
Preferably, the anti-C groove part gap inside of described wide-band slot antenna also comprises the second vertical sub-gap 137, the 3rd vertical sub-gap 138, and described first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 are arranged in parallel.
Preferably, described first vertical sub-gap 137, vertical sub-gap 136, second and the 3rd vertical sub-gap 138 are the gaps being operated in 1/2nd wavelength.
Preferably, the composition of described ribbon feed element 110 comprises the banded feed subelement 111 of Article 1 and the banded feed subelement 112 of Article 2,
Wherein, the banded feed subelement 112 of described Article 2 is vertical with the lower limb of described substrate 100, and the first end of the banded feed subelement 112 of Article 2 is arranged on the lower edge of substrate 100, the second end of the banded feed subelement 112 of Article 2 is connected with the first end of the banded feed subelement 111 of Article 1;
The banded feed subelement 112 of described Article 2 feed subelement 111 one-tenth J degree obtuse angles banded with described Article 1.
Preferably, the first end of the banded feed subelement 111 of described Article 1 broadens gradually to the strip width of its second end.
Preferably, the banded feed subelement 112 of described Article 2 feed subelement 111 one-tenth 135 degree obtuse angles banded with described Article 1.
Preferably, the port of described ribbon feed element 110 is the impedance matching of 50 ohm.
The present invention has following advantage and effect relative to prior art:
1, compared with conventional uniform impedance gap, the present invention adopts Stepped Impedance gap, can realize the control to the multiple mode of resonance of antenna.
2, increase by one group of 1/2nd wavelength slot in anti-C groove part gap inside, adds additional a mode of resonance, expanded the bandwidth of operation of antenna.
3, Antenna Construction Design disclosed by the invention is simple, and volume is little, and cost is low, goes for plurality of communication systems.
Accompanying drawing explanation
Fig. 1 is the structural representation of prior art middle width strip slot antenna;
Fig. 2 is the structural representation of slot antenna in prior art;
Fig. 3 is the vertical section cutaway view of a kind of wide-band slot antenna proposed in the present invention;
Fig. 4 is the structural representation of a kind of wide-band slot antenna proposed in the present invention;
Fig. 5 is the simulation result schematic diagram of a kind of wide-band slot antenna proposed in the present invention;
In figure, Reference numeral is: 100-substrate, 110-ribbon feed element, the banded feed subelement of 111-Article 1, the banded feed subelement of 112-Article 2,120-ground, 130-radiating element of antenna, the sub-gap of 131-first, the sub-gap of 132-second, the sub-gap of 133-the 3rd, the sub-gap of 134-the 4th, the sub-gap of 135-the 5th, the vertical sub-gap of 136-first, the vertical sub-gap of 137-second, the vertical sub-gap of 138-the 3rd.
Embodiment
For making object of the present invention, technical scheme and advantage clearly, clearly, developing simultaneously referring to accompanying drawing, the present invention is described in more detail for embodiment.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment
The vertical section cutaway view of a kind of width slit antenna that the present embodiment proposes and structural representation are respectively as shown in Figure 3 and Figure 4, this wide-band slot antenna integral manufacturing, on the medium substrate of double-sided copper-clad, uses machinery to scribe, the technology such as laser scoring, circuit board corrosion all can easily make.A kind of core content of width slit antenna disclosed in the present embodiment is to use Stepped Impedance gap and 1/2nd wavelength slot to design the broad-band antenna of a superior performance.
It is 4.2 that a kind of width slit antenna disclosed in the present embodiment is produced on dielectric constant in the manner of a printed circuit board, thickness is on the micro-band plate of polytetrafluoroethylene double-sided copper-clad of 1.5mm, structure as shown in Figure 3 and Figure 4, slot antenna disclosed in this embodiment is the frequency bandwidth of 1.5GHz to 4.8GHz in 10dB reflection loss scope, and overall dimensions is 66mm × 32mm.
The wide-band slot antenna that the present embodiment proposes comprises:
The ground 120 that the ribbon feed element 110 that plate-like dielectric substrate 100, substrate 100 upper surface metal forming are formed, substrate 100 lower surface metal paper tinsel are formed and the radiating element of antenna 130 cracking in ground 120 and formed, wherein, radiating element of antenna 130 comprises the first vertical sub-gap 136 that an anti-C groove part gap and at least one is positioned at anti-C groove part gap inside.
In the present embodiment, the anti-C groove part gap inside of wide-band slot antenna also comprises the second vertical sub-gap 137, the 3rd vertical sub-gap 138, and the first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 are arranged in parallel, specifically put as shown in Figure 4.
The composition of anti-C groove part gap comprises the first sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133, the 4th sub-gap 134, the 5th sub-gap 135, wherein, first sub-gap 131, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the second sub-gap 132; 5th sub-gap 135, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the 4th sub-gap 134; 3rd sub-gap 133, the inside that its first end is formed in ground is in line with second end in the second sub-gap 132 and is connected, and the inside that its second end is formed in ground is in line with second end in the 4th sub-gap 134 and is connected.
First sub-gap 131 is identical with the 5th sub-gap 135, the second sub-gap 132 is identical with the 4th sub-gap 134, makes anti-C groove part gap form laterally zygomorphic structure.First sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133 are different, form the sub-gap of Stepped Impedance, realize the control of the mode of resonance to described wide-band slot antenna.
There are 3 explanations that require emphasis: the one end in the first, first sub-gap 131 and the 5th sub-gap 135 is formed in the end edge place on ground, and the inside that its other end is formed in ground becomes an angle of 90 degrees to connect with the second sub-gap 132 with the wherein one end in the 4th sub-gap 134; Second, first sub-gap 131 and the 5th sub-gap 135 measure-alike, the second sub-gap 132 and the 4th sub-gap 134 measure-alike, the anti-C groove part gap of formation is symmetrical up and down; 3rd, first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 vertically laid parallel are inner in anti-C groove part gap, and particular location is such as determined by simulation optimization apart from waiting with gap 133.In order to reach better impedance matching, length and the width in the first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 can have fine difference.
The composition of ribbon feed element 110 comprises the banded feed subelement 111 of Article 1 and the banded feed subelement 112 of Article 2, and it is for from external reception electric current, and performs coupling and produce radiation to make the antenna element unit of the inside being arranged on ground.
Wherein, the banded feed subelement 112 of Article 2 is vertical with the lower limb of substrate 100, and the first end of the banded feed subelement 112 of Article 2 is arranged on the lower edge of substrate 100, the second end of the banded feed subelement 112 of Article 2 is connected with the first end of the banded feed subelement 111 of Article 1.
Wherein, the first end of Article 1 banded feed subelement 111 broadens gradually to the strip width of its second end, this part carries out bending and progressive increase, and this is in order to the first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 better couple feed and reach better coupling in whole frequency range.
In the present embodiment, the banded feed subelement 112 of Article 2 feed subelement 111 one-tenth 135 degree obtuse angles banded with described Article 1, the port of ribbon feed element 110 is the impedance matching of 50 ohm.
The working method of whole wide-band slot antenna is that electromagnetic signal inputs from ribbon feed element 110 port, and the radiating element of antenna being coupled to the formation of each gap radiate, and the mode of Received signal strength is then contrary.
Fig. 5 shows the scattering parameter simulation result of the present embodiment middle width strip slot antenna, and transverse axis represents the signal frequency of the present embodiment middle width strip slot antenna, and the longitudinal axis represents return loss (S
11) amplitude.In the signal emission process of the wide-band slot antenna of the present embodiment, the Partial Power of signal is reflected back toward signal source, is become reflection power by the power reflected.S
11represent that its corresponding mathematical function is as follows: reflection power/incident power==20*log|S by the relation between the input power of the signal of the present embodiment middle width strip slot antenna and the reflection power of signal
11|.
This wide-band slot antenna 10dB return loss scope is 1.5GHz to 4.8GHz, relative bandwidth reaches 105%, cover GPS (1.575-GHz), LTE (1.710-2.690GHz), UMTS (1.920-2.170GHz), WLAN (2.4-GHz), WiMAX (2.5/3.5-GHz), UWB (3.1-4.8GHz, low-frequency range). etc. frequency range, be extremely applicable to broadband connections or multimode communication field.Also can learn from this figure, the principle that this slot antenna produces broadband is that inherent general 1.5GHz, 2GHz, 3GHz, 3.8GHz, 4.6GHz frequency place of band creates five modes of resonance, wherein first four are produced by anti-C groove part gap, last is produced by one group of 1/2nd wavelength slot of anti-C groove part gap inside, five modes of resonance obtain good coupling, because which form the broadband character of antenna, be applicable to broadband connections or multimode communication field.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a wide-band slot antenna, is characterized in that, described wide-band slot antenna comprises:
The ground 120 that the ribbon feed element 110 that plate-like dielectric substrate 100, substrate 100 upper surface metal forming are formed, substrate 100 lower surface metal paper tinsel are formed and the radiating element of antenna 130 cracking in ground 120 and formed,
Wherein, radiating element of antenna 130 comprises the first vertical sub-gap 136 that an anti-C groove part gap and at least one is positioned at anti-C groove part gap inside.
2. a kind of wide-band slot antenna according to claim 1, is characterized in that, the composition of described anti-C groove part gap comprises the first sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133, the 4th sub-gap 134, the 5th sub-gap 135,
Wherein, the first sub-gap 131, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the second sub-gap 132;
5th sub-gap 135, its first end is formed in the edge on ground, and the inside that its second end is formed in ground becomes an angle of 90 degrees to connect with the first end in the 4th sub-gap 134;
3rd sub-gap 133, the inside that its first end is formed in ground is in line with second end in the second sub-gap 132 and is connected, and the inside that its second end is formed in ground is in line with second end in the 4th sub-gap 134 and is connected.
3. a kind of wide-band slot antenna according to claim 2, is characterized in that, described first sub-gap 131 is identical with the 5th sub-gap 135, the second sub-gap 132 is identical with the 4th sub-gap 134, makes anti-C groove part gap form laterally zygomorphic structure.
4. a kind of wide-band slot antenna according to claim 3, it is characterized in that, described first sub-gap 132, sub-gap 131, second, the 3rd sub-gap 133 are different, form the sub-gap of Stepped Impedance, realize the control of the mode of resonance to described wide-band slot antenna.
5. a kind of wide-band slot antenna according to claim 1, it is characterized in that: the anti-C groove part gap inside of described wide-band slot antenna also comprises the second vertical sub-gap 137, the 3rd vertical sub-gap 138, and described first vertical sub-gap 137, vertical sub-gap 136, second, the 3rd vertical sub-gap 138 are arranged in parallel.
6. a kind of wide-band slot antenna according to claim 5, is characterized in that: described first vertical sub-gap 137, vertical sub-gap 136, second and the 3rd vertical sub-gap 138 are the gaps being operated in 1/2nd wavelength.
7. according to the arbitrary described a kind of wide-band slot antenna of claim 1 to 6, it is characterized in that: the composition of described ribbon feed element 110 comprises the banded feed subelement 111 of Article 1 and the banded feed subelement 112 of Article 2,
Wherein, the banded feed subelement 112 of described Article 2 is vertical with the lower limb of described substrate 100, and the first end of the banded feed subelement 112 of Article 2 is arranged on the lower edge of substrate 100, the second end of the banded feed subelement 112 of Article 2 is connected with the first end of the banded feed subelement 111 of Article 1;
The banded feed subelement 112 of described Article 2 feed subelement 111 one-tenth J degree obtuse angles banded with described Article 1.
8. according to the arbitrary described a kind of wide-band slot antenna of claim 1 to 6, it is characterized in that: the first end of the banded feed subelement 111 of described Article 1 broadens gradually to the strip width of its second end.
9. a kind of wide-band slot antenna according to claim 7, is characterized in that: the banded feed subelement 112 of described Article 2 feed subelement 111 one-tenth 135 degree obtuse angles banded with described Article 1.
10. a kind of wide-band slot antenna according to claim 7, is characterized in that: the port of described ribbon feed element 110 is the impedance matching of 50 ohm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410698895.0A CN104409841B (en) | 2014-11-26 | 2014-11-26 | A kind of wide-band slot antenna |
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| CN201410698895.0A CN104409841B (en) | 2014-11-26 | 2014-11-26 | A kind of wide-band slot antenna |
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| CN104409841B CN104409841B (en) | 2017-06-06 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742804A (en) * | 2016-04-08 | 2016-07-06 | 东南大学 | Coaxial feed capacitance-loaded triple-polarized slot antenna |
| CN105762524A (en) * | 2016-04-08 | 2016-07-13 | 东南大学 | Coaxial feed capacitor-loaded half slot antenna |
| CN105789874A (en) * | 2016-04-08 | 2016-07-20 | 东南大学 | Capacitor-loaded stepped-impedance triple-polarization slotted antenna |
| CN105846098A (en) * | 2016-04-08 | 2016-08-10 | 南京邮电大学 | Grid seam earth microstrip feed capacitance loaded tri-polarized slot antenna |
| CN105896044A (en) * | 2016-04-08 | 2016-08-24 | 东南大学 | Slot antenna with coaxial feed capacitor-loaded step impedance |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105742804A (en) * | 2016-04-08 | 2016-07-06 | 东南大学 | Coaxial feed capacitance-loaded triple-polarized slot antenna |
| CN105762524A (en) * | 2016-04-08 | 2016-07-13 | 东南大学 | Coaxial feed capacitor-loaded half slot antenna |
| CN105789874A (en) * | 2016-04-08 | 2016-07-20 | 东南大学 | Capacitor-loaded stepped-impedance triple-polarization slotted antenna |
| CN105846098A (en) * | 2016-04-08 | 2016-08-10 | 南京邮电大学 | Grid seam earth microstrip feed capacitance loaded tri-polarized slot antenna |
| CN105896044A (en) * | 2016-04-08 | 2016-08-24 | 东南大学 | Slot antenna with coaxial feed capacitor-loaded step impedance |
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