CN104143689A - Three-frequency antenna used for Bluetooth/RFID/WLAN/WiMAX - Google Patents
Three-frequency antenna used for Bluetooth/RFID/WLAN/WiMAX Download PDFInfo
- Publication number
- CN104143689A CN104143689A CN201410354583.8A CN201410354583A CN104143689A CN 104143689 A CN104143689 A CN 104143689A CN 201410354583 A CN201410354583 A CN 201410354583A CN 104143689 A CN104143689 A CN 104143689A
- Authority
- CN
- China
- Prior art keywords
- antenna
- semicircular ring
- bluetooth
- wimax
- wlan
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Waveguide Aerials (AREA)
Abstract
The invention belongs to the technical field of microstrip antennas and provides a three-frequency antenna used for Bluetooth/RFID/WLAN/WiMAX. The purpose is to increase the bandwidth of the antenna and achieve a multi-band design for the antenna. According to the technical scheme, the antenna comprises a ground plate, a feeding point, a radiation patch and a medium substrate. The radiation patch is composed of four semicircular rings, a circular ring and two rectangular strips, wherein the four semicircular rings are symmetrical in pairs and connected in sequence, the circular ring is located on the lower portion in the middle of the region defined by the four semicircular rings, and the strip line width of connection between the four semicircular rings and the circular ring inside is smaller than the strip line width from the feeding point to the four semicircular rings. The medium substrate is an epoxy plate FR4. An arch-shaped structure is arranged on the ground plate below a strip line from the feeding point to the four semicircular rings. A circular defect is arranged in the arch-shaped structure. The main application is that the microstrip antennas are designed and manufactured.
Description
Technical field
The invention belongs to microstrip antenna technical field, relate in particular to a kind of three-frequency antenna for bluetooth/RFID/WLAN/WiMAX.
Technical background
Defect grounding structure (DGS:Defected Ground Structure), is one of hot topic of microwave regime newly-developed, and it is to be developed by photonic band gap structure (PBG).This structure, by etching cycle or aperiodicity figure on the transmission line ground planes such as microstrip line, changes the distribution of earth current, thereby changes the frequency characteristic of transmission line, can realize inhibition harmonic wave, increases the effects such as bandwidth.Defect grounding structure has application very widely in microwave circuit and Antenna Design.Can realize the research of multiband about defect grounding structure, also have a lot of achievements both at home and abroad.
Along with mobile radio system develops rapidly towards miniaturization, multi-functional and intelligentized direction, antenna is also faced with new requirement, i.e. miniaturization, multiband, broadband etc.Occurred that in recent years some are applicable to the single-band antenna of distinct communication standards, the Antenna Design that is still simultaneously applicable to bluetooth, RFID, WLAN and WiMAX is relative less.
Summary of the invention
In order to overcome the deficiencies in the prior art, for increasing the beamwidth of antenna, realize the multiband design of antenna, the technical scheme that the present invention takes is, for the three-frequency antenna of bluetooth/RFID/WLAN/WiMAX, comprise ground plate, distributing point, radiation patch and medium substrate, by four, symmetry, connected successively semicircular ring, an annulus and two rectangular bands form radiation patch between two, annulus is positioned at position on the lower, four semicircular ring institute regions middle parts, and it is narrower than the band line of distributing point to four semicircular ring with line width that four semicircular ring are connected with inner annulus; Medium substrate is epoxy plate FR4; Distributing point to four semicircular ring with the ground plate below line on be provided with domes, domes middle parts is provided with circular flaw.
The band line width that four semicircular ring are connected with inner annulus is 2mm, domes radius 10mm, circular flaw radius 1.9mm.
Four semicircular ring and the inside and outside limit of inner annulus radius are respectively: R1=8.5mm, R2=7.5mm, R3=4mm, R4=3mm, R5=4mm, R6=3mm; The band line length that four semicircular ring are connected with inner annulus is L1=5.5mm, and width is W1=2.0mm, the band line length of distributing point to four semicircular ring and wide be respectively Lf=13mm, Wf=2.6mm, the size of rectangle ground plate is 6mm × 25.0mm.
Compared with the prior art, technical characterstic of the present invention and effect:
Defect ground structure has increased the bandwidth of antenna, has realized multiband design, has good matching properties, and the pattern characteristics of antenna is relatively stable in all working frequency range, has good directivity.
Brief description of the drawings
Fig. 1. the structure chart of three-frequency antenna.
Fig. 2. the design process of antenna and return loss characteristic corresponding to each antenna.
(a) design process of antenna; (b) three corresponding S11 curves of antenna.
Fig. 3. antenna directional diagram at E face, H face respectively in the time of 2.45GHz, 3.5GHz, 5.5GHz.
Embodiment
The present invention is by introducing defect ground structure, designed a can be simultaneously for three monopole antennas frequently of bluetooth/RFID/WLAN/WiMAX.
Antenna comprises ground plate, distributing point, radiation patch and medium substrate.By four, symmetry, connected successively semicircular ring, an annulus and two rectangular bands form radiation patch between two; Medium substrate is epoxy plate FR4, relative dielectric constant ε r=4.4, and dielectric loss is 0.02; Feeding classification is feed microstrip line, and characteristic impedance is 50 Ω; .The structure chart of antenna as shown in Figure 1.
The initial design of antenna comes from antenna I, only comprise radiation patch and a floor of a class floweriness shape being spliced by four identical between two semicircular ring, as shown in Fig. 2 (a), radiating element is by after sub-miniature A connector feed, electric current is flowed through band line until more than half annulus top, radiation patch top from distributing point, the path length that this electric current is flowed through is 52.25mm (approximately 0.42 λ), and now antenna is only operated in a frequency range, substantially covers only bluetooth working frequency range.
Antenna II, by an annulus paster of the inner increase of four semicircular ring, can inspire another resonance frequency, and the surface area of antenna size does not change.In order to obtain better matching properties, compare by calculating, the band line width that four semicircular ring are connected with inner annulus is 2mm, narrower than the band line of distributing point to four semicircular ring.Now electric current is flowed through band line until interior annulus top from distributing point, and the path length that this electric current is flowed through is 31.06mm (approximately 0.34 λ), still can cover bluetooth working frequency range, has produced the second frequency range that approaches WiMAX working frequency range simultaneously.In the case of the size of antenna does not change, first resonance frequency is moved to the left, and the size that is equivalent to antenna is reduced.
In order to obtain the 3rd working frequency range, improve second working frequency range obtaining above simultaneously, above rectangle floor, adopt the structure archedly with circular flaw, defect radius R 8=1.9mm, the size of circular flaw and position have affected resonance frequency and the impedance bandwidth of antenna to a certain extent.By at the correct position etching circular flaw of structure archedly, emulation finds that the 3rd frequency range and broader bandwidth have appearred in antenna, coupling better because defect ground structure can elimination not wished the frequency occurring.Now electric current is flowed through band line until second annulus bottom from distributing point, and the path length that this electric current is flowed through is 18.5mm (approximately 0.33 λ), due to defect ground structure, has changed frequency characteristic herein, thereby has obtained the 3rd frequency range.Finally in the situation that not increasing overall volume, obtain covering bluetooth, the antenna of WLAN and WiMAX working frequency range.
The application HFSS of high frequency simulation software carries out simulation calculation and optimal design to antenna, to obtain optimum size and tuning relation.
Return loss, as shown in Fig. 2 (b), can find out, antenna I is only operated in a frequency range 2.31～2.61GHz, and resonance frequency is 2.44GHz.The impedance bandwidth of antenna II is respectively 2.27～2.48GHz, 3.18～3.39GHz, and centre frequency is respectively 2.38GHz, 3.26GHz.Antenna III provides 0.16GHz, 0.35GHz and tri-impedance bandwidths of 1.56GHz, and working frequency range is respectively 2.38～2.54GHz, 3.3～3.65GHZ and 4.85～6.41GHz, and centre frequency is respectively 2.47GHz, 3.42GHz and 5.31GHz.Antenna is at be respectively-19.1dB of the return loss at resonance point place ,-20.5dB and-21.1dB, demonstrate the matching properties that antenna is good.Fig. 3 be antenna in the time of 2.45GHz, 3.5GHz and 5.5GHz respectively at the directional diagram of E (xoz) plane, H (yoz) plane, the pattern characteristics of antenna is relatively stable in all working frequency range, has good directivity.In sum, defect ground structure has increased the bandwidth of antenna, has realized multiband design.
Further describe the present invention below in conjunction with a specific embodiment.
Feeding classification is feed microstrip line, and characteristic impedance is 50 Ω
Medium substrate size is 38mm × 25mm, high 0.8mm.Fig. 1 is the physical dimension figure (tow sides) of three-frequency antenna.Optimize and draw through HFSS, rectangle connecting band length is L1=5.5mm, width is W1=2.0mm, the length of microstrip line and wide be respectively Lf=13mm, Wf=2.6mm, the size on rectangle floor is 6mm × 25.0mm, wherein radius R 7=10mm archedly, defect radius R 8=1.9mm, radiating element R1=8.5mm, R2=7.5mm, R3=4mm, R4=3mm, R5=4mm, R6=3mm.
Claims (3)
1. the three-frequency antenna for bluetooth/RFID/WLAN/WiMAX, it is characterized in that, comprise ground plate, distributing point, radiation patch and medium substrate, by four, symmetry, connected successively semicircular ring, an annulus and two rectangular bands form radiation patch between two, annulus is positioned at position on the lower, four semicircular ring institute regions middle parts, and it is narrower than the band line of distributing point to four semicircular ring with line width that four semicircular ring are connected with inner annulus; Medium substrate is epoxy plate FR4; Distributing point to four semicircular ring with the ground plate below line on be provided with domes, domes middle parts is provided with circular flaw.
2. the three-frequency antenna for bluetooth/RFID/WLAN/WiMAX as claimed in claim 1, is characterized in that, the band line width that four semicircular ring are connected with inner annulus is 2mm, domes radius 10mm, circular flaw radius 1.9mm.
3. the three-frequency antenna for bluetooth/RFID/WLAN/WiMAX as claimed in claim 1, it is characterized in that, four semicircular ring and the inside and outside limit of inner annulus radius are respectively: R1=8.5mm, R2=7.5mm, R3=4mm, R4=3mm, R5=4mm, R6=3mm; The band line length that four semicircular ring are connected with inner annulus is L1=5.5mm, and width is W1=2.0mm, the band line length of distributing point to four semicircular ring and wide be respectively Lf=13mm, Wf=2.6mm, the size of rectangle ground plate is 6mm × 25.0mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354583.8A CN104143689B (en) | 2014-07-23 | 2014-07-23 | Three-frequency antenna for bluetooth/RFID/WLAN/WiMAX |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410354583.8A CN104143689B (en) | 2014-07-23 | 2014-07-23 | Three-frequency antenna for bluetooth/RFID/WLAN/WiMAX |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104143689A true CN104143689A (en) | 2014-11-12 |
| CN104143689B CN104143689B (en) | 2016-09-21 |
Family
ID=51852814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410354583.8A Expired - Fee Related CN104143689B (en) | 2014-07-23 | 2014-07-23 | Three-frequency antenna for bluetooth/RFID/WLAN/WiMAX |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104143689B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108172986A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Dual-frequency P CB plate antennas |
| CN105826675B (en) * | 2016-05-26 | 2019-06-18 | 华南理工大学 | A kind of three frequency microstrip antenna |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640315A (en) * | 2009-09-09 | 2010-02-03 | 东南大学 | Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure |
| CN203398283U (en) * | 2013-08-22 | 2014-01-15 | 中国计量学院 | A symmetric single-frequency microstrip antenna with multiple connected semicircles |
-
2014
- 2014-07-23 CN CN201410354583.8A patent/CN104143689B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101640315A (en) * | 2009-09-09 | 2010-02-03 | 东南大学 | Dual stop band ultra wide band antenna based on dual U-shaped defected ground structure |
| CN203398283U (en) * | 2013-08-22 | 2014-01-15 | 中国计量学院 | A symmetric single-frequency microstrip antenna with multiple connected semicircles |
Non-Patent Citations (2)
| Title |
|---|
| JING PEI: "Miniaturized Triple-Band Antenna With a Defected Ground Plan for WLAN/WiMAX Applications", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
| M.K.MOHAMED AMIN: "Design of Dual Rectangular Ring Antenna with DGS Technique for Wireless Application", 《2012 IEEE SYMPOSLUM ON WIRELESS TECHNOLOGY AND APPLICATIONS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105826675B (en) * | 2016-05-26 | 2019-06-18 | 华南理工大学 | A kind of three frequency microstrip antenna |
| CN108172986A (en) * | 2017-12-06 | 2018-06-15 | 广州创锦通信技术有限公司 | Dual-frequency P CB plate antennas |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104143689B (en) | 2016-09-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9252490B2 (en) | Multi-band antenna and electronic device provided with the same | |
| Si et al. | A uniplanar triple-band dipole antenna using complementary capacitively loaded loop | |
| EP3201986B1 (en) | Antenna device for a base station antenna system | |
| CN104733861A (en) | Antenna structure and wireless communication device with same | |
| Islam et al. | Design of microstrip patch antenna using novel U-shaped feeding strip with unequal arm | |
| CN107994321B (en) | Double-frequency dipole antenna with split resonant ring | |
| CN103515700A (en) | RFID antenna | |
| US10141645B2 (en) | Multiband antenna | |
| CN105322278A (en) | Antenna with continuous metal frame and electronic equipment employing antenna | |
| CN104868248A (en) | Broadband antenna | |
| Malaisamy et al. | Design and analysis of 4× 4 MIMO antenna with DGS for WLAN applications | |
| TW202215712A (en) | Antenna system | |
| Thakur et al. | A review on antenna design for 5G applications | |
| CN209747718U (en) | Microstrip dual-frequency antenna | |
| Ashish et al. | A dual band AMC backed antenna for WLAN, WiMAX and 5G wireless applications | |
| CN205376776U (en) | Low section GSM, LTE coplane directional aerial | |
| CN108258403B (en) | Miniaturized dual-frequency nested antenna | |
| CN102340056B (en) | Multiband antenna | |
| CN104143689B (en) | Three-frequency antenna for bluetooth/RFID/WLAN/WiMAX | |
| Raza et al. | Dual band millimeter wave phased array antenna for 5G mobile communications | |
| CN107994330B (en) | UHF/VHF broadband planar printed antenna | |
| CN102340051A (en) | Double-V-type dual-frequency antenna | |
| CN102904020A (en) | Wideband antenna | |
| Chen et al. | Compact millimeter-wave triband quasi-Yagi antenna for 5G and WiGig applications | |
| CN204361258U (en) | A kind of is rectangular-shaped three frequency microstrip antenna based on defect ground structure housing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160921 Termination date: 20210723 |