CN105161837A - Small coplanar waveguide-fed broadband printed antenna - Google Patents
Small coplanar waveguide-fed broadband printed antenna Download PDFInfo
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- CN105161837A CN105161837A CN201510558674.8A CN201510558674A CN105161837A CN 105161837 A CN105161837 A CN 105161837A CN 201510558674 A CN201510558674 A CN 201510558674A CN 105161837 A CN105161837 A CN 105161837A
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Abstract
The invention relates to a small coplanar waveguide (CPW)-fed broadband printed antenna, which comprises a first U-shaped monopole, a second U-shaped monopole, a CPW feeder line, a CPW gap and a dielectric substrate. According to the small coplanar waveguide-fed broadband printed antenna, three radiating elements are simultaneously excited, namely the first U-shaped monopole and the second U-shaped monopole are taken as a main radiating body at a low-frequency band; the first U-shaped monopole is taken as the main radiating body at a middle-frequency band; and the CPW feeder line is taken as the main radiating body at a high-frequency band, so that the operation bandwidth of the antenna is expanded. The small coplanar waveguide-fed broadband printed antenna has the advantages of simple and small antenna structure and wide frequency bands; the radiation pattern is kept stable within the entire frequency band; the small coplanar waveguide-fed broadband printed antenna is suitable for broadband communication systems represented by high-speed wireless personal area networks and broadband wireless local area networks and other antenna designs with relatively high demands on the bandwidth and the pattern stability within the frequency bands.
Description
Technical field
The invention belongs to the antenna design techniques field of wireless communication technology, the coplanar waveguide feed wideband printed antenna of miniaturization that in the frequency band relating to a kind of reliable communication, directional diagram is stable.
Background technology
Along with the fast development of Modern wireless communication technology, electromagnetic wave, as the carrier of information transmission, plays more and more important effect.And antenna, as radiation in wireless device or the device receiving radio wave, be widely used in the equipment such as radio communications equipment, radar, countermeasures set and radionavigation.
Broadband and ultrawideband, because it has the advantages such as transmission rate is high, power system capacity is large, have a wide range of applications in various fields such as Technology in High-speed WPAN, intelligent wireless local area network, outdoor peer-to-peer network and sensing, location and recognition networks.Along with the fast development worldwide of mobile communication cause, mobile communication system is in continuous evolution.Mobile communication system, from the third generation WCDMA, CDMA2000, TD-SCDMA mobile communication system, develops into the forth generation broadband wireless mobile communication network IMT-Advanced system extensively come into operation at present.EU Committee represented in December, 2013, will with business tie-up, to take out more than 700,000,000 Euros and 30 hundred million Euros respectively, for the research and development of the 5th generation (5G) mobile communication system.5th Generation Mobile Communication System will provide brand-new technology, realize can setting up contacting of person to person, people and automobile etc. in any place, and plan to realize 5G application at the year two thousand twenty.China dropped into 1.6 hundred million RMB in 2013, start National 863 plan " the 5th third-generation mobile communication (5G) system early-stage Study exploitation (first phase) " project, " systematically research 5G mobile communication system framework, wireless networking, wireless transmission, new antenna and radio frequency and new frequency spectrum develop and use key technology ".The quick growth of number of mobile users and the sharply increase of amount of user data, propose huge challenge to the capacity of mobile communication system with upgrading.
In order to meet the communicating requirement of multiple system simultaneously, realize shared by multiple systems and transmit-receive sharing, also reduce costs in order to the interference that reduces between antenna, the technology of current comparative maturity is that requirement individual antenna can work in broad frequency range.By having encouraged the higher mode of individual antenna, make single antenna be operated in multi-resonant pattern, thus expand bandwidth.More typically monopole antenna.This antenna structure is simple, and processing cost is low, can realize the bandwidth of several octave.But monopole antenna is all operated in monopole pattern in whole bandwidth, the electrical length of antenna pattern to monopole is more responsive.Consider that the bandwidth of broadband and ultra-wideband antenna is very wide, often can reach several octave, thus the electric size of monopole has changed several times in octave, so its antenna pattern distorts very serious in octave, and frequency is higher, distorts more obvious.All there is this problem in the single antenna of multi-resonant pattern.In order to improve the validity of wireless communication system and ensure the reliability of wireless communication system; also in order to reduce the cost of antenna; design the planar antenna keeping stablizing antenna pattern in broadband and ultra broadband, to promoting that the development of broadband wireless communications has very positive contribution.
Summary of the invention
Technical problem to be solved by this invention provides the miniaturization in a kind of working band with stabilising direction figure coplanar waveguide feed wideband printed antenna for above-mentioned prior art.
The present invention's adopted technical scheme that solves the problem is: a kind of miniaturized coplanar waveguide feed wideband printed antenna, comprising:
First U-shaped monopole (1), the microstrip line identical by three width connects to form successively;
Second U-shaped monopole (2), the microstrip line identical by three width connects to form successively;
CPW feeder line (3) is one section of microstrip line, and the first U-shaped monopole (1) underarm (1a) and the second U-shaped monopole (2) underarm (2a) are about its specular;
CPW gap (4), the gap all identical with width by two length forms, about CPW feeder line (3) specular;
Medium substrate (5), described first U-shaped monopole (1), the second U-shaped monopole (2), CPW feeder line (3), CPW gap (4) are all arranged at its one side.
First U-shaped monopole underarm and the second U-shaped monopole underarm are simultaneously as the metal floor of CPW feed structure.
First U-shaped monopole underarm and the second U-shaped monopole underarm and two CPW gaps are about CPW feeder line specular.
Form the first U-shaped monopole identical with the micro belt line width of the second U-shaped monopole.
Adjust the first U-shaped monopole, the second U-shaped monopole, CPW feeder line, each parameter value in CPW gap, each frequency range monopole mode of operation and impedance matching can be made, therefore the impedance of whole antenna is all adjustable as 50 ohm in each frequency band, realizes mating of whole antenna and input coaxial feed port.
CPW feeder line is connected with coaxial probe, uses coaxial probe to carry out feed.
Compared with prior art, the invention has the advantages that:
(1) antenna structure is simple, low cost of manufacture.
(2) propose to have encouraged three radiating elements, resonance, at different working frequency range, has expanded the bandwidth of operation of antenna, meets the requirement of system of broadband wireless communication to bandwidth simultaneously.
(3) adopt the monopole mode of operation with equidirectional figure, make antenna in whole working band, all have stable electromagnetic radiation directional characteristic, ensured stability and the reliability of broadband wireless communications.
Accompanying drawing explanation
Fig. 1 is the embodiment vertical view of antenna in the present invention, and on figure, the dimensional units of mark is millimeter (mm).
Fig. 2 is the embodiment end view of antenna in Fig. 1, and on figure, the dimensional units of mark is millimeter (mm).
Fig. 3 is the reflection coefficient analogous diagram of antenna embodiment in Fig. 1, wherein:
represent the reflection coefficient of emulation.
Fig. 4 is the antenna pattern of antenna in Fig. 1, Fig. 4 (a) for Antenna Operation at 2GHz, Fig. 4 (b) for Antenna Operation at 3GHz, Fig. 4 (c) for Antenna Operation is at 4.44GHz, wherein:
represent simulated radiation directional diagram.
Fig. 5 is the analogous diagram of antenna gain in Fig. 1, wherein:
represent the yield value of emulation.
Wherein:
First U-shaped monopole 1, second U-shaped monopole 2, CPW feeder line 3, CPW gap 4, medium substrate 5.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
As shown in Figure 1, the vertical view of the coplanar waveguide feed wideband printed antenna of a kind of miniaturization in the present embodiment, antenna structure comprises the first U-shaped monopole 1, second U-shaped monopole 2, CPW feeder line 3, CPW gap 4, medium substrate 5.First U-shaped monopole 1 and the second U-shaped monopole 2 connect to form in turn by the microstrip line that three width are identical, and the first U-shaped monopole 1 is identical with the second U-shaped monopole 2 micro belt line width.
CPW feeder line 3 is connected with coaxial probe, uses coaxial probe to carry out feed.
First U-shaped monopole 1 underarm 1a, the second U-shaped monopole 2 underarm 2a are simultaneously as the metal floor of CPW feed structure.
As illustrated in fig. 1 and 2, medium substrate 5 adopts the FR4 sheet material of relative dielectric constant 4.4, thickness 1.6mm.Described first U-shaped monopole 1, second U-shaped monopole 2, CPW feeder line 3, CPW gap 4 are all arranged at the same face of medium substrate 5.
Technical scheme of the present invention is achieved in that structure as depicted in figs. 1 and 2, when Antenna Operation is in comparatively low-frequency range, first U-shaped monopole 1 together with the second U-shaped monopole 2 as main radiator, Antenna Operation is in monopole pattern, adjust the total length of the first U-shaped monopole 1 and the second U-shaped monopole 2, the relative position in gap and length and microstrip line broadband between the first U-shaped monopole 1 and the second U-shaped monopole 2, the operating frequency of adjustable low-frequency range and impedance matching, now CURRENT DISTRIBUTION concentrates on the first U-shaped monopole 1 and the second U-shaped monopole 2.Structure as depicted in figs. 1 and 2, when Antenna Operation is in intermediate bands, first U-shaped monopole 1 is as main radiator, Antenna Operation is in monopole pattern, adjust length and the micro belt line width of the first U-shaped monopole 1, the operating frequency of adjustable intermediate bands and impedance matching, CURRENT DISTRIBUTION concentrates on the first U-shaped monopole 1.Structure as depicted in figs. 1 and 2, when Antenna Operation is in higher frequency band, Antenna Operation is monopole pattern, the length of adjustment CPW feeder line 3 and width, the operating frequency of adjustable monopole pattern and impedance matching, CURRENT DISTRIBUTION concentrates on CPW feeder line 3, and CPW feeder line 3 stretches out metal floor partial-length and is about 1/4th wavelength.Therefore, by each parameter of adjustment antenna, three radiating elements can have been encouraged, namely low-frequency range is that the first U-shaped one pole 1 and the second U-shaped monopole 2 are as main radiator, Mid Frequency is that the first U-shaped monopole 1 is as main radiator, high band be CPW feeder line 3 as main radiator, thus expanded the bandwidth of operation of antenna; Because antenna is all monopole mode of operation at low-frequency range, Mid Frequency and high band, have similar antenna radiation pattern, therefore the present invention has stable bidirectional radiation characteristic in whole working frequency range.The concrete outcome of this inventive embodiment is described as follows:
Antenna size can according to shown in Fig. 1 and Fig. 2: the micro belt line width forming the first U-shaped monopole (1) and the second U-shaped monopole 2 is 8.8mm.The underarm foreign minister 1a 27.1mm of the first U-shaped monopole 1, another arm foreign minister 16.7mm, long 27.4mm in interlude.The underarm foreign minister 2a 27.1mm of the second U-shaped monopole 2, another arm foreign minister 34.7mm, long 27.4mm in interlude.The long 6mm in gap between the upper arm of the first U-shaped monopole (1) and the upper arm of the second U-shaped monopole (2).The length of CPW feeder line 3 is 25.6mm, and width is 1.2mm.Two CPW gap 4 width are 1mm.Medium substrate 5 length is 45mm, and width is 57.4mm, and thickness is 1.6mm.As shown in Figure 3 ,-10dB bandwidth is 3.6087GHz to the reflection coefficient simulation result of the antenna made according to above size, from 1.7866GHz to 5.3953GHz.As shown in Figure 4, wherein Fig. 4 (a) is Antenna Operation X-Y plane and Y-Z plane radiation patterns when 2GHz to the simulation result of the antenna pattern of the antenna made with Fig. 1 and Fig. 2 illustrated dimension; Fig. 4 (b) is Antenna Operation X-Y plane and Y-Z plane radiation patterns when 3GHz; Fig. 4 (c) is Antenna Operation X-Y plane and Y-Z plane radiation patterns when 4.44GHz.Can see, on the given frequency, antenna all has stable bidirectional radiation characteristic.We define the summation that antenna 3-dB beamwidth is on a different frequency both direction (+Y and-Y) 3-dB beamwidth.Shown in Fig. 4 (a), Antenna Operation is X-Y plane when 2GHz, and 3-dB beamwidth is 150 °; Y-Z plane, 3-dB beamwidth is 110 °.Shown in Fig. 4 (b), Antenna Operation is X-Y plane when 3GHz, and 3-dB beamwidth is 150 °; Y-Z plane, 3-dB beamwidth is 155 °.Shown in Fig. 4 (c), Antenna Operation is X-Y plane when 4.44GHz, and 3-dB beamwidth is 100 °; Y-Z plane, 3-dB beamwidth is 120 °.The 3-dB beamwidth of visible antenna is all very wide.As shown in Figure 5, in 1.78GHz to 5.40GHz frequency band, antenna gain fluctuates at 3.65dB to 7.18dB in the gain of the antenna that Fig. 1 and Fig. 2 illustrated dimension makes.
Described antenna system can at 45 × 57.4mm
2plane space in, realize 3.6087GHz(from 1.7866GHz to 5.3953GHz) bandwidth, and there is in whole working band stable bidirectional radiation characteristic.
In addition to the implementation, the present invention also includes other execution modes, the technical scheme that all employing equivalents or equivalent substitute mode are formed, within the protection range that all should fall into the claims in the present invention.
Claims (5)
1. the coplanar waveguide feed wideband printed antenna of miniaturization, it is characterized in that, it comprises:
First U-shaped monopole (1), the microstrip line identical by three width connects to form successively;
Second U-shaped monopole (2), the microstrip line identical by three width connects to form successively;
CPW feeder line (3) is one section of microstrip line, and the first U-shaped monopole (1) underarm (1a) and the second U-shaped monopole (2) underarm (2a) are about its specular;
CPW gap (4), the gap all identical with width by two length forms, about CPW feeder line (3) specular;
Medium substrate (5), described first U-shaped monopole (1), the second U-shaped monopole (2), CPW feeder line (3), CPW gap (4) are all arranged at its one side.
2. the miniaturized coplanar waveguide feed wideband printed antenna of one according to claim 1, is characterized in that, the first U-shaped monopole (1) underarm (1a), the second U-shaped monopole (2) underarm (2a) are simultaneously as the metal floor of CPW feed structure.
3. the miniaturized coplanar waveguide feed wideband printed antenna of one according to claim 1, is characterized in that, forms the first U-shaped monopole (1) identical with the micro belt line width of the second U-shaped monopole (2).
4. the miniaturized coplanar waveguide feed wideband printed antenna of one according to claim 1, it is characterized in that, adjust the first U-shaped monopole (1), the second U-shaped monopole (2), CPW feeder line (3), CPW gap (4) each parameter value, each frequency range monopole mode of operation and impedance matching can be made, therefore the impedance of whole antenna is all adjustable as 50 ohm in each frequency band, realizes mating of whole antenna and input coaxial feed port.
5. the miniaturized coplanar waveguide feed wideband printed antenna of one according to claim 1, is characterized in that, CPW feeder line (3) is connected with coaxial probe, uses coaxial probe to carry out feed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510558674.8A CN105161837A (en) | 2015-09-06 | 2015-09-06 | Small coplanar waveguide-fed broadband printed antenna |
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| CN201510558674.8A CN105161837A (en) | 2015-09-06 | 2015-09-06 | Small coplanar waveguide-fed broadband printed antenna |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410398A (en) * | 2016-11-23 | 2017-02-15 | 常州柯特瓦电子有限公司 | Full transparent broadband vehicle antenna based on grapheme materials |
| CN108054507A (en) * | 2017-12-11 | 2018-05-18 | 吉林医药学院 | A kind of N shape end plane slot antennas with non-closed floor |
| CN108987919A (en) * | 2018-07-24 | 2018-12-11 | 西安电子科技大学 | A kind of polygon ultra-wideband antenna of compact unsymmetric structure |
| WO2019137522A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市信维通信股份有限公司 | Antenna unit, mimo antenna and handheld device |
| CN110518347A (en) * | 2019-08-27 | 2019-11-29 | 南京邮电大学 | A kind of multiband car antenna |
| CN112751185A (en) * | 2020-12-29 | 2021-05-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Antenna unit, antenna device and electronic terminal |
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| JP2003087044A (en) * | 2001-09-12 | 2003-03-20 | Mitsubishi Materials Corp | Antenna for rfid and rfid system having the antenna |
| TW200529494A (en) * | 2004-02-19 | 2005-09-01 | Jin-Sen Chen | CPW-fed compact ring-slot antenna with back-patch |
| CN202977718U (en) * | 2012-11-14 | 2013-06-05 | 中国计量学院 | An ultra-wide-band microstrip antenna with a multistage band-stop characteristic |
| CN205016672U (en) * | 2015-09-06 | 2016-02-03 | 中国人民解放军63680部队 | Miniaturized co -planar waveguide feed broadband printed antenna |
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2015
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Patent Citations (4)
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| JP2003087044A (en) * | 2001-09-12 | 2003-03-20 | Mitsubishi Materials Corp | Antenna for rfid and rfid system having the antenna |
| TW200529494A (en) * | 2004-02-19 | 2005-09-01 | Jin-Sen Chen | CPW-fed compact ring-slot antenna with back-patch |
| CN202977718U (en) * | 2012-11-14 | 2013-06-05 | 中国计量学院 | An ultra-wide-band microstrip antenna with a multistage band-stop characteristic |
| CN205016672U (en) * | 2015-09-06 | 2016-02-03 | 中国人民解放军63680部队 | Miniaturized co -planar waveguide feed broadband printed antenna |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410398A (en) * | 2016-11-23 | 2017-02-15 | 常州柯特瓦电子有限公司 | Full transparent broadband vehicle antenna based on grapheme materials |
| CN108054507A (en) * | 2017-12-11 | 2018-05-18 | 吉林医药学院 | A kind of N shape end plane slot antennas with non-closed floor |
| CN108054507B (en) * | 2017-12-11 | 2024-02-02 | 吉林医药学院 | N-shaped terminal plane slot antenna with non-closed floor |
| WO2019137522A1 (en) * | 2018-01-15 | 2019-07-18 | 深圳市信维通信股份有限公司 | Antenna unit, mimo antenna and handheld device |
| US10950953B2 (en) | 2018-01-15 | 2021-03-16 | Shenzhen Sunway Communication Co., Ltd. | Antenna unit, MIMO antenna and handheld device |
| CN108987919A (en) * | 2018-07-24 | 2018-12-11 | 西安电子科技大学 | A kind of polygon ultra-wideband antenna of compact unsymmetric structure |
| CN110518347A (en) * | 2019-08-27 | 2019-11-29 | 南京邮电大学 | A kind of multiband car antenna |
| CN110518347B (en) * | 2019-08-27 | 2020-10-16 | 南京邮电大学 | Multi-band vehicle-mounted antenna |
| CN112751185A (en) * | 2020-12-29 | 2021-05-04 | 瑞声新能源发展(常州)有限公司科教城分公司 | Antenna unit, antenna device and electronic terminal |
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