CN104993242A - High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna - Google Patents
High-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna Download PDFInfo
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- CN104993242A CN104993242A CN201510346586.1A CN201510346586A CN104993242A CN 104993242 A CN104993242 A CN 104993242A CN 201510346586 A CN201510346586 A CN 201510346586A CN 104993242 A CN104993242 A CN 104993242A
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Abstract
The invention discloses a high-common-mode-rejection high-resistance-band differential ultra-wideband SIR slot antenna. The slot antenna comprises a medium substrate, and the slot antenna further comprises a micro-strip feeder line disposed on the front face of the medium substrate, a first differential feed port and a second differential feed port, the first differential feed port and the second differential feed port are disposed in a mutually symmetrical manner, a resonant branch is disposed a region formed in an enclosing manner that the first differential feed port and the second differential feed port are connected with two ends of the micro-strip feeder line, and a part of the resonant branch is disposed in a manner that the part of the resonant branch is parallel to the micro-strip feeder line; and the slot antenna further comprises a step-like SIR slot etched in rectangular ground of the back face of the medium substrate, a first resonant slot and a second resonant slot, the first resonant slot and the second resonant slot are symmetrically to each other, the step-like SIR slot feeds back electricity through the micro-strip feeder line, and the first resonant slot and the second resonant slot are disposed on two sides of the step-like SIR slot in a manner that the first resonant slot and the second resonant slot are parallel to each other. The slot antenna has the advantage of the high notch characteristic rectangular degree and the good stop band characteristic, and can satisfy requirements of miniaturization and low cost and a requirement that the slot antenna is easy to integrate in a differential circuit.
Description
Technical field
The present invention relates to wireless communication technology field, particularly a kind of high stop band difference ultra broadband SIR slot antenna of high common mode inhibition.
Technical background
Along with the development of wireless communication technology, miniaturization, the high integration demand of wireless communication system radio frequency device are more and more stronger.At present, radio circuit adopts differential technique signal transmission usually, and a lot of radio frequency front-end devices can directly be integrated on transponder chip.But traditional antenna great majority are designed to one port devices, can not directly and difference channel integrated, usually need adopt Ba Lun differential signal is converted to single port signal then feed antenna.The use of Ba Lun can cause loss, and system effectiveness is reduced, and too increases the quantity of individual devices, is unfavorable for that system height is integrated and miniaturized.Antenna Design is dual-port form by differential antennae, directly two ports of differential signal feed antenna, can directly and difference channel integrated, decrease the use of barron device part, improve system effectiveness, simultaneously also for the radio frequency front-end devices of design high integration provides better solution.
Differential signal, also referred to as difference mode signal, refers to the radiofrequency signal that the signal transmission that a pair amplitude equal phase is contrary, difference channel adopt differential signal transmission useful.Common-mode signal is the signal that a pair amplitude equal phase acted on differential signal line is also identical, and common-mode signal often comes from outside interference.In theory, differential transmission circuit has good noiseproof feature to common-mode signal.But in reality, due to various factors, the common-mode signal still having portion of external interference generation is transferred in differential antennae.If differential antennae does not have common-mode rejection properties, the common-mode signal that external disturbance produces will by radiation or reception as useful differential signal, and this can produce very large interference to system.The differential antennae therefore with common-mode rejection properties is more suitable for difference channel integrated, has more competitiveness.But there is not the difference ultra-wideband antenna with common-mode rejection properties at present.
Radio ultra wide band system (UWB, Ultra-Wideband) operating frequency is from 3.1GHz-10.6GHz, this creates overlapping with other the 5.5GHz frequency range of wireless communication system as the 5.2GHz/5.8GHz of WLAN (wireless local area network) WLAN and global microwave internet access system WiMAX, disturbing mutually to not produce communication, being just necessary to realize trap characteristic in these frequency ranges.Have in the ultra-wideband antenna of trap characteristic at present, great majority utilize single resonance structure to realize single trap characteristic, and the trap characteristic rectangular degree produced like this is poor, and effect is bad, effectively can not avoid and the disturbing mutually of other communication systems in notch band.
2011, Zhi-An Zheng, the people such as Qing-Xin Chu and Zhi-Hong Tu deliver in the article being entitled as " Compact Band-Rejected Ultrawideband Slot Antennas Inserting With λ/2and λ/4Resonators " at " IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION ", use traditional single port antenna design method, adopt feed microstrip line mode, feed is carried out to ground notch cuttype SIR gap, achieves ultra broadband work.Respectively etch half-wavelength and quarter-wave gap on the ground, devise two to have trap characteristic antenna at 5GHz-6GHz.But because two antenna does not adopt differential feed to design, all not easily integrated with difference channel, and the trap characteristic rectangular degree that two antenna realizes is all bad.
2012, Li Li, Jing Yang, Xinwei Chen, the people such as Xiaowei Zhang deliver in the article being entitled as " Ultra-Wideband Differential Wide-Slot Antenna With Improved Radiation Patterns and Gain " at " IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION ", adopt differential microstrip feeding classification, utilize symmetric radiation paster to carry out feed to wide gap, achieve Ultra Wideband communications.But the differential antennae in this article did not both have common-mode rejection properties, did not realize trap characteristic yet.
Summary of the invention
The object of the invention is to overcome the shortcoming of prior art and deficiency, a kind of high stop band difference ultra broadband SIR slot antenna of high common mode inhibition is provided.
Object of the present invention is achieved through the following technical solutions:
A kind of high stop band difference ultra broadband SIR slot antenna of high common mode inhibition, comprise medium substrate and also comprise the microstrip feed line being arranged on medium substrate front, the first symmetrical differential feed port and the second differential feed port, described first differential feed port, the second differential feed port are connected in surrounded region with the two ends of described microstrip feed line and are provided with resonance minor matters, and a part and the described microstrip feed line of described resonance minor matters be arranged in parallel; Also comprise the rectangle being etched in the medium substrate back side ground notch cuttype SIR gap, the first symmetrical resonant slot and the second resonant slot, described notch cuttype SIR gap is by described microstrip feed line feed, and the first resonant slot and the second resonant slot are arranged on the both sides in described notch cuttype SIR gap in parallel to each other.
Described resonance minor matters are vertically bent into three sections, and in U-shaped, its total length is half-wavelength.
Described notch cuttype SIR gap is connected and composed, with vertical being arranged on the corresponding medium substrate back side, position of described microstrip feed line by the gap that two sections of width are all different from length.
The first described resonant slot and the second resonant slot length are all quarter-wave.
Compared with prior art, tool has the following advantages and beneficial effect in the present invention:
1, compared with traditional single port UWB antenna, the design have employed differential feed design, has two feed port, does not need, by barron device part, directly to connect difference channel, thus more easily and difference channel integrated.
2, compared with existing difference UWB antenna, the design has very high common-mode rejection properties in whole communications band.
Compared with the antenna 3, with majority with trap characteristic, the trap characteristic rectangular degree that the design realizes is high, and stopband characteristic is good, eliminates disturbing mutually of UWB communication system and WLAN and WiMAX communication system.
4, the design have employed planar structure, simplicity of design, and volume is little, and cost is low.
Accompanying drawing explanation
Fig. 1 is the Facad structure schematic diagram of the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition of the present invention;
Fig. 2 is the structure schematic diagram of the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition of the present invention;
Fig. 3 is the structural representation of the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition of the present invention;
Fig. 4 is the Electromagnetic Simulation curve chart of the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As Fig. 1,2,3, a kind of high stop band difference ultra broadband SIR slot antenna of high common mode inhibition, comprise medium substrate 5, also comprise the microstrip feed line 3 being arranged on medium substrate 5 front, the first symmetrical differential feed port one and the second differential feed port 2, described first differential feed port one and the second differential feed port 2 are connected in surrounded region with the two ends of described microstrip feed line 3 and are provided with resonance minor matters 4, and mid portion and the microstrip feed line 3 of described resonance minor matters 4 be arranged in parallel; Also comprise the notch cuttype SIR gap 7 on the rectangle ground 6 being etched in medium substrate 5 back side, the first symmetrical resonant slot 8 and the second resonant slot 9, described notch cuttype SIR gap 7 is by described microstrip feed line 3 feed, and the first resonant slot 8 and the second resonant slot 9 are arranged on the both sides in described notch cuttype SIR gap 7 in parallel to each other;
Described resonance minor matters 4 are vertically bent into three sections, and in U-shaped, its total length is half-wavelength;
Described notch cuttype SIR gap 7 is connected and composed by the gap that two sections of width are all different from length, is arranged on the back side of the medium substrate 5 corresponding with the position of described microstrip feed line 3;
The first described resonant slot 8 and the length of the second resonant slot 9 are all quarter-wave;
The relative dielectric constant of described medium substrate 5 is 2.55;
The characteristic impedance of described microstrip-fed line and half-wavelength resonance minor matters is 50 ohm, is convenient to feed coupling.
When the first differential feed port one and the second differential feed port 2 accept differential signal excitation, on microstrip feed line 3, meeting generation current, carries out feed to the notch cuttype SIR gap 7 being etched in rectangle ground 6, has encouraged generation current around gap.Notch cuttype SIR gap 7 can produce multiple resonance band, thus realizes ultra-wide-band emission characteristic.When the first differential feed port one and the second differential feed port 2 accept common-mode signal excitation, can not generation current on microstrip feed line 3, the notch cuttype SIR gap 7 at excitable media substrate 5 back side can not carry out radiation, therefore achieve high common-mode rejection properties.Because single trap structure can only realize the trap characteristic near single frequency, and trap rectangular degree is bad, in order to realize the good trap characteristic of rectangular degree in 5GHz-6GHz frequency range, in the region that the first differential feed port one and the second differential feed port 2 and microstrip feed line 3 surround, introduce resonance minor matters 4, its length is the half-wavelength of required trap frequency.Etch again the first resonant slot 8 and the second resonant slot 9 on the ground symmetrically, its length is the quarter-wave of required trap frequency.In trap frequency section, electric current in resonance minor matters 4 is very strong and contrary with the electric current on microstrip line 3, and ground electric current major part is distributed in around the first resonant slot 8 and the second resonant slot 9, this just causes antenna in these Frequency point impedance mismatching, thus realizes trap characteristic.
The strange mould reflection coefficient curve of Electromagnetic Simulation as shown in Figure 4, because the trap effect of resonance minor matters 4 and the first resonant slot 8 and the realization of the second resonant slot 9 is coupled, thus achieves the trap characteristic with good rectangular degree in 5GHz-6GHz frequency range.
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 (4)
1. the high stop band difference ultra broadband SIR slot antenna of a high common mode inhibition, comprise medium substrate, it is characterized in that: also comprise the microstrip feed line being arranged on medium substrate front, the first symmetrical differential feed port and the second differential feed port, described first differential feed port, the second differential feed port are connected in surrounded region with the two ends of described microstrip feed line and are provided with resonance minor matters, and a part and the described microstrip feed line of described resonance minor matters be arranged in parallel; Also comprise the rectangle being etched in the medium substrate back side ground notch cuttype SIR gap, the first symmetrical resonant slot and the second resonant slot, described notch cuttype SIR gap is by described microstrip feed line feed, and the first resonant slot and the second resonant slot are arranged on the both sides in described notch cuttype SIR gap in parallel to each other.
2. the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition according to claim 1, it is characterized in that: described resonance minor matters are vertically bent into three sections, in U-shaped, its total length is half-wavelength.
3. the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition according to claim 1, it is characterized in that: described notch cuttype SIR gap is connected and composed by the gap that two sections of width are all different from length, is arranged on the medium substrate back side corresponding with the position of described microstrip feed line.
4. the high stop band difference ultra broadband SIR slot antenna of high common mode inhibition according to claim 1, is characterized in that: the first described resonant slot and the second resonant slot length are all quarter-wave.
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Cited By (10)
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| CN105470643A (en) * | 2015-12-23 | 2016-04-06 | 华南理工大学 | Differential UWB antenna with high common-mode rejection ratio and high rectangularity trapped wave |
| CN106450723A (en) * | 2016-09-27 | 2017-02-22 | 华南理工大学 | Differential feeding structure suitable for broadband planar dipole antenna and differential feeding method |
| CN107196061A (en) * | 2017-07-03 | 2017-09-22 | 华南理工大学 | A kind of three frequency microstrip slot antennas based on loading resonator |
| CN107221748A (en) * | 2017-07-03 | 2017-09-29 | 华南理工大学 | The frequency filtering microstrip slot antenna of one kind three |
| CN107394374A (en) * | 2017-06-30 | 2017-11-24 | 天津大学 | Ultra-wideband monopole antenna with double trap characteristics |
| CN107394365A (en) * | 2017-07-18 | 2017-11-24 | 西安电子科技大学 | The ultra wide band differential antennae of trap restructural |
| CN110459866A (en) * | 2019-08-09 | 2019-11-15 | 武汉慧联无限科技有限公司 | A kind of gap structure trap antenna and the gateway with the antenna |
| CN111463562A (en) * | 2020-03-03 | 2020-07-28 | 杭州电子科技大学 | Ultra-wideband differential feed PIFA antenna with filtering effect |
| CN111463563A (en) * | 2020-03-03 | 2020-07-28 | 杭州电子科技大学 | Ultra-wideband differential PIFA antenna suitable for 5G communication |
| CN113381192A (en) * | 2021-06-15 | 2021-09-10 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105470643A (en) * | 2015-12-23 | 2016-04-06 | 华南理工大学 | Differential UWB antenna with high common-mode rejection ratio and high rectangularity trapped wave |
| CN105470643B (en) * | 2015-12-23 | 2018-07-20 | 华南理工大学 | Difference UWB antennas with high cmrr and high rectangle degree trap |
| CN106450723A (en) * | 2016-09-27 | 2017-02-22 | 华南理工大学 | Differential feeding structure suitable for broadband planar dipole antenna and differential feeding method |
| CN107394374A (en) * | 2017-06-30 | 2017-11-24 | 天津大学 | Ultra-wideband monopole antenna with double trap characteristics |
| CN107196061A (en) * | 2017-07-03 | 2017-09-22 | 华南理工大学 | A kind of three frequency microstrip slot antennas based on loading resonator |
| CN107221748A (en) * | 2017-07-03 | 2017-09-29 | 华南理工大学 | The frequency filtering microstrip slot antenna of one kind three |
| CN107394365A (en) * | 2017-07-18 | 2017-11-24 | 西安电子科技大学 | The ultra wide band differential antennae of trap restructural |
| CN110459866A (en) * | 2019-08-09 | 2019-11-15 | 武汉慧联无限科技有限公司 | A kind of gap structure trap antenna and the gateway with the antenna |
| CN111463562A (en) * | 2020-03-03 | 2020-07-28 | 杭州电子科技大学 | Ultra-wideband differential feed PIFA antenna with filtering effect |
| CN111463563A (en) * | 2020-03-03 | 2020-07-28 | 杭州电子科技大学 | Ultra-wideband differential PIFA antenna suitable for 5G communication |
| CN113381192A (en) * | 2021-06-15 | 2021-09-10 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
| CN113381192B (en) * | 2021-06-15 | 2022-07-26 | 西安电子科技大学 | Low-profile filtering antenna with broadband external suppression |
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Application publication date: 20151021 |