CN102938501B - Broadband bidirectional microstrip antenna - Google Patents
Broadband bidirectional microstrip antenna Download PDFInfo
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- CN102938501B CN102938501B CN201210528788.4A CN201210528788A CN102938501B CN 102938501 B CN102938501 B CN 102938501B CN 201210528788 A CN201210528788 A CN 201210528788A CN 102938501 B CN102938501 B CN 102938501B
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- parallelogram
- substrate
- microstrip antenna
- copper
- arm
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Abstract
The invention discloses a broadband bidirectional microstrip antenna, and relates to a microstrip antenna. The broadband bidirectional microstrip antenna is provided with a dielectric substrate, wherein two faces of the dielectric substrate are coated with copper, and a parallelogram-shaped oscillator with two L-shaped grooves are printed on the front side of the substrate, wherein the L-shaped grooves are in inverse symmetry relative to the central position; and the back side of the substrate is fully coated with copper. On the front side, the upper and lower sides of the parallelogram are respectively parallel to the upper and lower sides of the substrate, and the parallelogram is centrally placed on the substrate. The two L-shaped grooves are oppositely placed in inverse symmetry relative to the central point and respectively etched to the upper and lower sides of the parallelogram, one arm of each L-shaped groove is vertical to the upper and lower sides of the parallelogram while the other arm is parallel to the upper and lower sides of the parallelogram. The back side of the substrate is completely coated with copper so as to be used as a ground plane. A through hole is drilled from the central position of the front side parallelogram to the back side, and a 50ohm coaxial line connector is used for feeding the parallelogram-shaped oscillator from the back side via the through hole. The broadband bidirectional microstrip antenna is bidirectional, wide in frequency band, low in profile, high in gain, high in radiation efficiency and simple in structure.
Description
Technical field
The present invention relates to a kind of microstrip antenna, especially relate to a kind of DCS1800 communication protocol that can be used for Mobile communication direct base station, at the wide-band bidirectional microstrip antenna of parallelogram oscillator body fluting.
Background technology
Repeater is conventionally to adopt in current mobile communication system, covers the equipment of range and message capacity for improving mobile communication.Repeater is applied in some special applications scenes conventionally, as stops up inside corridor, narrow street, tunnel, highway, and in these occasions, General Requirements discharging-directly station antenna should have: bidirectional radiation, broadband, high gain characteristics.Meanwhile, in order further to reduce the volume of antenna equipment, require antenna will there is low section characteristic.
At present, there is the researcher of part to do about thering is the research of the antenna of bidirectional radiation characteristic, proposed the multiple antenna structure of realizing bidirectional characteristic.Common structure has: planar array antenna and two are directional antenna back-to-back
[1 ~ 3].The people such as LongshengLiu adopt six folded dipole collinear set battle arrays, at two end-on directions, have realized about 9.05dBi gain.But array antenna feed structure is complicated, and antenna area is larger
[1].X.Li, L.Yang, the people such as S.-X.Gong utilize dipole antenna to form array and have realized the double frequency bilateral antenna that can be operated in 2.4/5.8GHz, and in 2.4GHz and 5.8GHz frequency range, the direction coefficient of antenna on two end-on directions reaches respectively 4.5～5.9dB and 6.1～8.9dB
[2].Also there is relevant document to propose to utilize individual antenna unit to realize bidirectional radiation characteristic.The antenna structure of realizing bidirectional radiation characteristic has: loop aerial, be nested in list (two) utmost point antenna of ground loop
[4 ~ 6].Liu Cong, the people such as Xue Fengzhang are nested in a monopole antenna on the ground plane of a U-shaped, have realized the bidirectional characteristic of antenna, and in all working frequency points, the gain of antenna on two end-on directions is all more than 4.8dBi.But these antennas that utilize individual antenna unit to realize bidirectional characteristic are all to adopt stereochemical structure, cannot realize low section.The people such as H.Arai, by the microstrip antenna of H shape ground plane and crank shape feed structure, have really realized bidirectional radiation low profile antenna structure
[7].As added the passive paster of guiding in both sides, its end-fire gain can reach 5.71dBi
[8].But this grounding structure face needs H shape opening, during application, requiring has certain altitude from physics ground.
List of references:
[1]Longsheng?Liu,Zhijun?Zhang,Zijian?Tian,et?al.A?bidirectional?endfire?array?with?compactantenna?elements?for?coal/mine?tunnel?communication[J].IEEE?Antennas?and?WirelessPropagation?Letters,2012,11:342-345。
[2]X.Li,L.Yang,S.-X.Gong,et?al.Bidirectional?high?gain?antenna?for?WLAN?applications[J].Progress?in?Electromagnetics?Research?Letters,2009,6:99-106。
[3]J.Zhang,X.-M.Zhang,J.-S.Liu,et?al.Dual-band?bidirectional?high?gain?antenna?for?WLAN2.4/5.8GHz?applications[J].Electronics?Letters,2009,45(1):6-7。
[4] Liu Cong, Xue Fengzhang. a kind of broadband monopole antenna [J] for tunnel coverage. microwave journal, 2010,26 (6): 50-53.
[5]Jordi?Soler,Carles?Puente,Alberto?Puerto.A?dual-band?bidirectional?multilevel?monopoleantenna[J].Microwave?and?Optical?Technology?Letters,2002,34(6):445-448。
[6]K.Chawanonphithak,C.Phongcharoenpanich,S.Kosulvit,et?al.Characteristics?of?an?ellipticalring?antenna?excited?by?a?linear?electric?probe[J].International?Journal?of?Electronics,2007,94(10):973-984。
[7]T.Mukaiyama,H.Arai,Y.Ebine.Bi-directional?notch?and?crank-shaped?antenna[A].AsiaPacific?Microwave?Conference[C].1997.1:417-420。
[8]H.Arai,K.Kohzu,T.Mukaiyama.Bi-directional?notch?antenna?with?parasitic?elements?fortunnel?booster?system[A].Antennas?and?Propagation?Society?International?Symposium[C].1997.4:2218-2221。
Summary of the invention
The object of the present invention is to provide a kind of wide-band bidirectional microstrip antenna that there is bidirectional characteristic, broadband, low section, gains high, radiation efficiency is high, simple in structure.
The present invention is provided with double-side copper-applying medium substrate, is printed with the parallelogram sturcutre oscillator with two L shaped grooves of relative center antisymmetry in substrate front side; On substrate reverse side, all apply copper.On front, upper below upper parallel below with substrate respectively of parallelogram, and parallelogram is placed on substrate between two parties.Two L shaped grooves are with respect to central point symmetrical placement in the other direction, two L shaped grooves are etched to respectively the both sides up and down of parallelogram, and a wherein arm of L shaped groove is upper vertical below with parallelogram, is longitudinal arm, another one arm is upper parallel below with parallelogram, is transverse arm.Reverse side all applies copper as ground plane.From the center of front parallelogram, bore a through hole to reverse side, with the coaxial line joint of 50 Ω, by through hole, from the negative parallelogram oscillator is carried out to feed.
Described substrate is F4BK-2 double-side copper-applying medium substrate, and the length of substrate can be 110 ± 0.1mm, and width can be 70 ± 0.1mm, and thickness can be 3mm; Apply the relative dielectric constant ε of copper medium substrate
rcan be 4.3.
The length of side of described parallelogram sturcutre oscillator can be 87.9 ± 0.1mm, the wide 41.8 ± 0.1mm that can be, and the upper distance that staggers below can be 7.7 ± 0.1mm.Two identical L shaped groove antisymmetry of shape size are placed.Longitudinal arm lengths of L shaped groove can be 34.5 ± 0.1mm, and longitudinally arm width can be 2.7 ± 0.1mm, and transverse arm length can be 4.8 ± 0.1mm, and transverse arm width can be 4.1 ± 0.1mm.
Compare with existing printing discharging-directly station antenna, the present invention has following outstanding advantage and significant effect:
There is bidirectional radiation characteristic, broadband, low section, gain high, simple in structure, production cost is low.Its relative bandwidth is that 5.8% liang of end-fire directive gain is about 4.3dBi, and in the working band of antenna, radiation field of aerial is the linear polarization with certain inclination angle.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention.
Fig. 2 is the return loss performance figure of the embodiment of the present invention.In Fig. 2, abscissa represents frequency Frequency (GHz), and ordinate represents feed port reflection coefficient S
11(dB), curve a represents simulation result simulation; Curve b represents measured result measure.
Fig. 3 is the yoz face directional diagram when frequency is 1.79GHz of the embodiment of the present invention.
Fig. 4 is the yoz face directional diagram when frequency is 1.85GHz of the embodiment of the present invention.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
Referring to Fig. 1, the present invention is provided with double-side copper-applying medium substrate 1, and the front of medium substrate is parallelogram oscillator body 2, L shaped groove 3.
Medium substrate 1 adopts its long 110.0mm ± 0.1mm of being of common F4BK-2 double-side copper-applying circuit substrate, and wide is 70.0mm ± 0.1mm, and thickness is 3mm; Apply the relative dielectric constant ε of copper medium substrate
rbe 4.3.Parallelogram oscillator body 2 length of sides are 87.9 ± 0.1mm, and wide is 41.8 ± 0.1mm, and the upper distance that staggers is below 7.7 ± 0.1mm.The spacing of two L shaped grooves 3 of antisymmetry is 6.8 ± 0.1mm, and longitudinal arm lengths of L shaped groove is 34.5 ± 0.1mm, and longitudinally arm width is 2.7 ± 0.1mm, and transverse arm length is 4.8 ± 0.1mm, and transverse arm width is 4.1 ± 0.1mm.
Referring to Fig. 2, Fig. 2 has provided port reflection coefficient (dB) performance map of the embodiment of the present invention.As can be seen from Figure 2, bandwidth of operation scope 1.776 ~ 1.865GHz of antenna-10dB, absolute bandwidth is 105MHz, relative bandwidth is about 5.8%.
Referring to Fig. 3 and 4, from Fig. 3 and 4, operating frequency be 1.79GHz and time in yoz plane, i.e. directional diagram on E face, has a bidirectional radiation characteristic working band internal antenna is approximate, greatest irradiation direction to+z axle is the skew of radiation element normal direction.At 1.79GHz resonance frequency, greatest irradiation direction be with radiation element to the direction that becomes 50 ° of angles, its gain is about 4.3dBi; At 1.85GHz resonance frequency, greatest irradiation direction with+z axle clamp angle is 54 °, its gain is about 4.3dBi.
Claims (5)
1. wide-band bidirectional microstrip antenna, is characterized in that being provided with double-side copper-applying medium substrate, is printed with the parallelogram sturcutre oscillator with two L shaped grooves in substrate front side, and the center of described two L shaped groove opposing parallel quadrilateral structure oscillators is antisymmetry; On substrate reverse side, all apply copper; On front, upper below upper parallel below with substrate respectively of parallelogram, and parallelogram is placed on substrate between two parties; Two L shaped grooves are etched to respectively the both sides up and down of parallelogram, and a wherein arm of L shaped groove is upper vertical below with parallelogram, is longitudinal arm, and another arm is upper parallel below with parallelogram, is the transverse arm towards away from parallelogram center; Reverse side all applies copper as ground plane; From the center of front parallelogram, bore a through hole to reverse side, with the coaxial line joint of 50 Ω, by through hole, from the negative parallelogram oscillator is carried out to feed.
2. wide-band bidirectional microstrip antenna as claimed in claim 1, is characterized in that described substrate is F4BK-2 double-side copper-applying medium substrate.
3. wide-band bidirectional microstrip antenna as claimed in claim 2, the length that it is characterized in that described substrate is 110 ± 0.1mm, and width is 70 ± 0.1mm, and thickness is 3mm.
4. wide-band bidirectional microstrip antenna as claimed in claim 1, is characterized in that the relative dielectric constant ε of described deposited copper medium substrate
rbe 4.3.
5. wide-band bidirectional microstrip antenna as claimed in claim 1, the longitudinal arm lengths that it is characterized in that described L shaped groove is 34.5 ± 0.1mm, and longitudinally arm width is 2.7 ± 0.1mm, and transverse arm length is 4.8 ± 0.1mm, and transverse arm width is 4.1 ± 0.1mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210528788.4A CN102938501B (en) | 2012-12-10 | 2012-12-10 | Broadband bidirectional microstrip antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210528788.4A CN102938501B (en) | 2012-12-10 | 2012-12-10 | Broadband bidirectional microstrip antenna |
Publications (2)
| Publication Number | Publication Date |
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| CN102938501A CN102938501A (en) | 2013-02-20 |
| CN102938501B true CN102938501B (en) | 2014-09-03 |
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| CN201210528788.4A Expired - Fee Related CN102938501B (en) | 2012-12-10 | 2012-12-10 | Broadband bidirectional microstrip antenna |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104701600A (en) * | 2013-12-06 | 2015-06-10 | 智易科技股份有限公司 | Antenna structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469674B1 (en) * | 2001-05-17 | 2002-10-22 | James Stanley Podger | Double-lemniscate antenna element |
| CN2533634Y (en) * | 2001-09-05 | 2003-01-29 | 西安海天天线科技股份有限公司 | Broadband microstrip patch antenna |
| CN102683827A (en) * | 2012-06-07 | 2012-09-19 | 清华大学 | Bidirectional radiating antenna used in mine shafts and tunnels |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5594455A (en) * | 1994-06-13 | 1997-01-14 | Nippon Telegraph & Telephone Corporation | Bidirectional printed antenna |
| JP3246643B2 (en) * | 1995-01-25 | 2002-01-15 | 日本電信電話株式会社 | Bidirectional printed circuit board antenna |
| CN100428564C (en) * | 2004-06-01 | 2008-10-22 | 香港城市大学 | Broad band paster antenna with double L shaped probes |
| CN101710652B (en) * | 2008-11-05 | 2013-01-23 | 广东通宇通讯股份有限公司 | Integrated wide-band bilateral radiating antenna |
| CN102522628B (en) * | 2011-12-09 | 2014-05-14 | 清华大学 | High gain bidirectional end-fire antenna array applied to mine and tunnel |
-
2012
- 2012-12-10 CN CN201210528788.4A patent/CN102938501B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6469674B1 (en) * | 2001-05-17 | 2002-10-22 | James Stanley Podger | Double-lemniscate antenna element |
| CN2533634Y (en) * | 2001-09-05 | 2003-01-29 | 西安海天天线科技股份有限公司 | Broadband microstrip patch antenna |
| CN102683827A (en) * | 2012-06-07 | 2012-09-19 | 清华大学 | Bidirectional radiating antenna used in mine shafts and tunnels |
Non-Patent Citations (2)
| Title |
|---|
| Bi-directional Notch and Crank-shaped Antenna;Tohru MUKAIYAMA et al.;《Asia Pacific Microwave Conference》;19970131;第417-420页 * |
| Tohru MUKAIYAMA et al..Bi-directional Notch and Crank-shaped Antenna.《Asia Pacific Microwave Conference》.1997, |
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| CN102938501A (en) | 2013-02-20 |
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