CN102163768A - Dual-band and low-profile array antenna - Google Patents
Dual-band and low-profile array antenna Download PDFInfo
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- CN102163768A CN102163768A CN2011100731357A CN201110073135A CN102163768A CN 102163768 A CN102163768 A CN 102163768A CN 2011100731357 A CN2011100731357 A CN 2011100731357A CN 201110073135 A CN201110073135 A CN 201110073135A CN 102163768 A CN102163768 A CN 102163768A
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Abstract
The invention discloses a dual-band and low-profile array antenna, which comprises a low-band array antenna and a high-band array antenna and is characterized in that: the low-band array antenna and the high-band array antenna are vertically sleeved in an embedded manner; a patch radiating element and a parallel feed mode are adopted in an array unit of the low-band array antenna; a printed dipole antenna employing double-wire balance feed is adopted in an array unit of the high-band array antenna and printed Balun is adopted to realize unbalanced-balanced conversion; and a hybrid feed mode combining parallel feed and serial feed is adopted in the high-band array antenna. According to the invention, the two band array units share an oral surface; the dual-band and low-profile array antenna has a compact structure and a small size; the mutual influence between two band arrays is reduced; the problems of poor cross polarization, complicated feed structure, low radiation frequency, low channel separation and the like of the dual-band (multi-band or wideband) array units are solved; and a printed feed network is adopted in a feed network to facilitate the shaping of a radiation pattern.
Description
Technical field
The present invention relates to the low section array antenna of a kind of two-band.
Background technology
Electronic engineering such as Modern wireless communication or radar often needs a width of cloth array antenna can have the function of two width of cloth antennas by a width of cloth antenna like this two frequency range work.Have simultaneously high efficiency, low-cross polarization, rule electric property such as directional diagram and in light weight, section is low, the easier people's of being subjected to of dual-band antenna of compact conformation favor.Dual-band array antenna with above-mentioned performance not only can simplified system be formed, and saves cost, improves the reliability of system, can also reduce the installing space of antenna, is convenient to camouflage etc.Some novel dual-band array antennas have been developed by people in succession and have been applied in different fields respectively at present, and these dual-band array antennas roughly can reduce:
1, utilizes the annulus radiating curtain unit of arc probe feed and the dual-band array antenna of the nested composition of printed dipole array element, though the section of this dual-band array antenna is lower, but be subjected to the restriction of this kind array element version, this kind array element is difficult to be applied to the higher occasion of frequency.Its maximum operating frequency does not reach the maximum operating frequency of the dual-frequency array antenna of this specification argumentation.
2, by radiation patch array element and the nested dual-band array antenna of forming of printed slot (being printed on the ground plane) array element, the radiation patch array element is operated in low-frequency range, and the printed slot array element is operated in high band.But the working band of printed slot array element is narrow, does not reach the working band (relative bandwidth 13%) of the dual-band array antenna of this specification argumentation.Because this dual-band array antenna is made up of two layer medium sheet material, do not possess the antenna structure of low section, light weight simultaneously.Though change medium sheet material into weight that foamed plastics can alleviate antenna, the radiating slot on the ground plane can produce unnecessary radiation in the other direction, causes the gain of array antenna to descend, and the front and back of directional diagram descend than level.
3, utilize the dual-band array antenna of the nested composition of double polarized micro strip antenna array element, but the working band of microstrip antenna array column unit is narrow.
4, utilize the medium that is added with parasitic element to apply the dual-band array antenna that symmetrical dipole is formed as array element, the dipole array unit of this special shape can be two frequency range work.By adding angle reflector in the array element back, shape that can controlling level face directional diagram.But because the existence of dihedral reflecting plate, this dual-band array antenna does not have the antenna structure of low section, light weight.
5, double frequency-band (many, the broadband) array antenna that utilizes broadband " rabbit ear " broadband radiation array element to form, " rabbit ear " has good cross-polarization performance though the radiating curtain unit is compared with other broadband radiation array elements, but its aspect ratio is higher, can not realize the antenna structure of low section.
6, double frequency-band (many, the broadband) array antenna that utilizes radiating curtain unit, broadband, Vivaldi slit to form, in order to realize double frequency-band (many, broadband) array antenna, the array element (corresponding different respectively frequency ranges) of a plurality of different sizes can be carried out nested placement, and adopt the reflection multilayer plate structure, avoided directional diagram graing lobe even deterioration to occur like this.But this array antenna height is higher, can not realize the array antenna structure of low section.
Summary of the invention
Practical problem to be solved by this invention is to overcome the defective that prior art exists, and has proposed the low section array antenna of a kind of two-band, can effectively reduce influencing each other of two frequency range array antennas.
Two-band of the present invention is hanged down the section array antenna, comprises low-frequency range array antenna, high band array antenna; It is characterized in that: described high band array antenna is nested up and down with the low-frequency range array antenna; The array element of described low-frequency range array antenna adopts the paster radiating element, adopts feeding classification arranged side by side; The array element of high band array antenna adopts the printed dipole sub antenna of two-wire balanced feeding, and realizes imbalance-balance conversion with printing Balun; The mixing feeding classification of employing of high band array antenna and feedback and series feed fusion.
The present invention, the array element of low-frequency range array antenna adopts the paster radiating element, the array element of high band array antenna adopts the wide-band printing dipole antenna of two-wire balanced feeding, employing is with both array element that the method for nested placement realized two frequency ranges actinal surfaces altogether that staggers up and down, compact conformation, size are little, have reduced influencing each other of two frequency range array antennas; The high band array antenna adopts and mixes feeding technique, has further reduced influencing each other of two frequency range array antennas.The printing-type array element not only has the antenna structure of low section, and the while also is easy to microwave circuit integrated, and the processing high conformity, and ghost effect is little, can make antenna be operated in higher frequency range.Because each frequency range is used array element separately rather than adopted double frequency (multiband or broadband) array element work, the array element cross polarization is low, feed structure is complicated, radiation efficiency is low, channel is isolated low inferior problem to have solved two-band (multiband or broadband).Array element form after utilize optimizing is also carried out the optimal design of feeding network, and the array element spacing of reasonable disposition array antenna can reduce influencing each other between two array antennas simultaneously, guarantees that antenna has the directional diagram of rule; Adopted the printing-type feeding network that is easy to carry out power control in this dual-band array antenna, the convenient like this array antenna to each frequency range carries out beam forming processing.
Description of drawings
Fig. 1 is the end view of dual-band array antenna of the present invention.The 1st, the medium sheet material of low-frequency range array antenna, the 2nd, ground plane, the 3rd, the feed microstrip line network of low-frequency range array antenna, the 4th, the paster radiating element of low-frequency range array antenna, the 5th, feed probes, the 6th, the medium sheet material of high band array antenna, the 7th, the array element of high band array antenna and printing-type feeding network.
Fig. 2 is the vertical view of high band array antenna of the present invention, the 8th, the printing-type feeding network of high band array antenna, the 9th, the array element of high band array antenna (being the wide-band printing dipole), the 10th, the balanced-to-unblanced transformer of high band array antenna (Balun).
Fig. 3 is the vertical view of low-frequency range array antenna of the present invention, the 11st, and the feed microstrip line network of low-frequency range array antenna, the 12nd, the array element of low-frequency range array antenna (being the paster radiating element).
Fig. 4 is the standing-wave ratio figure of the dual-band array antenna of test, (a) is the standing-wave ratio figure of high band array antenna, (b) is the standing-wave ratio figure of low-frequency range array antenna.
Fig. 5 is the antenna pattern of array antenna at 5800MHz.
Fig. 6 is the antenna pattern of array antenna at 2400MHz
Embodiment
Below in conjunction with drawings and Examples, the present invention is elaborated.
By Fig. 1, Fig. 2, Fig. 3, this two-band is hanged down the section array antenna, and the 1st layer is the medium sheet material of low-frequency range array antenna, and the lower surface of this medium sheet material is a ground plane, and upper surface is the feed microstrip line network of low-frequency range array antenna.The 2nd layer is the paster radiating element of low-frequency range.Be connected by feed probes between paster radiating element and the feed microstrip line network, feed probes departs from the center of paster radiating element along the length direction of paster radiating element.The 3rd layer is the medium sheet material of high band array antenna, and the array element of high band array antenna and printed feed network are printed on the upper and lower surface of high band array antenna medium sheet material respectively.Discuss the design consideration and the advantage of every part below more in detail.
1. high band: the operating frequency of considering high band is higher, should select for use the less relatively medium sheet material in loss tangent angle to reduce dielectric loss.Need to select for use the sheet material of medium sheet material thinner thickness to guarantee that radiation dipole two arms are anti-phase and reduce the surface wave loss simultaneously.Because the array element of high band array antenna and the top that the printed feed network all is in the low-frequency range array antenna must reduce the influence of high band array antenna to the low-frequency range array element as far as possible.Simplifying array element and feeding network structure is to reduce the high band array antenna low-frequency range array antenna to be influenced one of measure that needs consideration.Though and the feedback method can obtain symmetric radiation patterns, and makes things convenient for the control of travel direction figure, when frequency is higher, feed structure that it is complicated and long transmission line will cause loss excessive.Series feed method has the simple physics structure, can make feeder line drop to minimum to the influence of low-frequency range array element, but during the frequency departure centre frequency, increase along with the array element number, the cross polarization level of the antenna pattern of array antenna and minor level all can increase, even the phenomenon of lobe division occurs.So select the mixing feed method of fusion and feedback and series feed technology for use.Array element is selected the printed dipole sub antenna that adopts the two-wire balanced feeding for use, can widen the impedance bandwidth of array element by the width of overstriking printed dipole sub antenna.For the antenna pattern to antenna carries out figuration, utilize quarter-wave conversion, can carry out the power division of each array element in conjunction with transmission line theory, realize the wave beam forming design of array antenna.
2. low-frequency range
The operating frequency of considering the low-frequency range array antenna is lower, can select the cheap relatively epoxy sheet material of cost for use.Since the array element of low-frequency range array antenna be in the high band array antenna array element below, the high band array element has effects such as reflection, parasitism to it.Both influencing each other had crucial effect for the width of the spacing of low-frequency range array element and high band array element and low-frequency range array element, length etc. but the width of array element, the resonance frequency that length determines the low-frequency range array element again.Therefore must between these performances, be optimized processing.Because its feed microstrip line network is printed on the ground plane reverse side, little to the array element influence of high band array antenna, carry out the figuration of radiation pattern for convenience, selected for use and the feedback technology.
Embodiment
With the dual-band array antenna that is applied in WLAN (wireless local area network) is example, and low-frequency range will cover IEEE 802.11b (2400-2483MHz) frequency range, and high band will cover IEEE 802.11a (5150-5850MHz) frequency range.Then
High band
As shown in Figure 1, 2, the high band array antenna is formed the board selection DIELECTRIC CONSTANT by the individual wide-band printing dipole in 64 (8 * 8)
r=2.2, thickness is the Teflon sheet material of 0.78mm.For guaranteeing cascade adjacent array element and cascade submatrix homophase, the adjacent subarray spacing of cascade adjacent array element spacing or cascade is designed to a wavelength of centre frequency.In order to realize the signal-balanced array element that is transferred to of input port, as shown in Figure 2, between signal input port and feed microstrip line network, added the balanced-to-unblanced transformer (Balun) of printing-type curve gradual change.Array element is from ground plane height 10mm, and the good impedance operator that so not only can obtain also can obtain the array antenna structure of low section.Fig. 4 (a) is the standing-wave ratio curve of its test, therefrom finds out, the relative impedance bandwidth of this array antenna reaches 13%.Fig. 5 is the antenna pattern of one of them Frequency point (5800MHz), from its minor level, cross polarization level, zero dark level, independent array antenna (not considering the low-frequency range array antenna) and dual-band array antenna (considering the low-frequency range array antenna) comparing result as can be seen, the low-frequency range array antenna can be ignored substantially to the influence of high band array antenna.
Low-frequency range
Shown in Fig. 1,3, the low-frequency range array antenna is formed the board selection DIELECTRIC CONSTANT by the individual paster radiating element in 16 (4 * 4)
r=4.4, thickness is the FR4 sheet material of 1.0mm.The paster radiating element is from ground plane height 6mm, and an end of feed probes is connected with the paster radiating element in the place of departing from paster radiating element center line 6mm along paster radiating element length direction, and the other end is connected with the feed microstrip line network.The adjacent array element spacing is 2 times of high band adjacent array element spacing.Consider and influence each other the dimensionally-optimised length x width=12 * 54mm that is designed to of array element between the impedance operator of array element and two the frequency range array antennas.Fig. 4 (b) is the standing-wave ratio curve of its test, therefrom finds out, this array antenna satisfies impedance operator within bandwidth.Fig. 6 is the antenna pattern of one of them Frequency point (2400MHz), comparing result as can be seen from its minor level, cross polarization level, zero dark level, independent array antenna (not considering the low-frequency range array antenna) and dual-band array antenna (considering the low-frequency range array antenna), though the high band array antenna is bigger than its influence to the high band array antenna to its influence, but because the high band array antenna structure is simple, its influence to the low-frequency range array antenna has dropped to minimum, and the directional diagram of low-frequency range array antenna does not worsen.The validity of this array antenna design has been described.
Claims (1)
1. the low section array antenna of two-band comprises low-frequency range array antenna, high band array antenna; It is characterized in that: described high band array antenna is nested up and down with the low-frequency range array antenna; The array element of described low-frequency range array antenna adopts the paster radiating element, adopts feeding classification arranged side by side; The array element of high band array antenna adopts the printed dipole sub antenna of two-wire balanced feeding, and realizes imbalance-balance conversion with printing Balun; The mixing feeding classification of employing of high band array antenna and feedback and series feed fusion.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100731357A CN102163768A (en) | 2011-03-25 | 2011-03-25 | Dual-band and low-profile array antenna |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100731357A CN102163768A (en) | 2011-03-25 | 2011-03-25 | Dual-band and low-profile array antenna |
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| CN102163768A true CN102163768A (en) | 2011-08-24 |
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| CN2011100731357A Pending CN102163768A (en) | 2011-03-25 | 2011-03-25 | Dual-band and low-profile array antenna |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403572A (en) * | 2011-12-13 | 2012-04-04 | 华南理工大学 | Wideband double frequency mobile communication base station antenna |
| CN109841941A (en) * | 2017-11-29 | 2019-06-04 | 华为技术有限公司 | Dual-band antenna and wireless telecom equipment |
| CN110176668A (en) * | 2019-05-22 | 2019-08-27 | 维沃移动通信有限公司 | Antenna element and electronic equipment |
| CN113555691A (en) * | 2021-07-09 | 2021-10-26 | 侯宇庆 | Single printed dipole, double dipole, four dipole and eight dipole array antennas |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104343A (en) * | 1998-01-14 | 2000-08-15 | Raytheon Company | Array antenna having multiple independently steered beams |
| US20040017314A1 (en) * | 2002-07-29 | 2004-01-29 | Andrew Corporation | Dual band directional antenna |
-
2011
- 2011-03-25 CN CN2011100731357A patent/CN102163768A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6104343A (en) * | 1998-01-14 | 2000-08-15 | Raytheon Company | Array antenna having multiple independently steered beams |
| US20040017314A1 (en) * | 2002-07-29 | 2004-01-29 | Andrew Corporation | Dual band directional antenna |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403572A (en) * | 2011-12-13 | 2012-04-04 | 华南理工大学 | Wideband double frequency mobile communication base station antenna |
| CN102403572B (en) * | 2011-12-13 | 2013-09-25 | 华南理工大学 | Wideband double frequency mobile communication base station antenna |
| CN109841941A (en) * | 2017-11-29 | 2019-06-04 | 华为技术有限公司 | Dual-band antenna and wireless telecom equipment |
| US11309620B2 (en) | 2017-11-29 | 2022-04-19 | Huawei Technologies Co., Ltd. | Dual-band antenna and wireless communications device |
| CN110176668A (en) * | 2019-05-22 | 2019-08-27 | 维沃移动通信有限公司 | Antenna element and electronic equipment |
| US11769952B2 (en) | 2019-05-22 | 2023-09-26 | Vivo Mobile Communication Co., Ltd. | Antenna element and electronic device |
| CN113555691A (en) * | 2021-07-09 | 2021-10-26 | 侯宇庆 | Single printed dipole, double dipole, four dipole and eight dipole array antennas |
| CN113555691B (en) * | 2021-07-09 | 2023-09-26 | 侯宇庆 | Uniprinted dipole, double dipole, quad dipole and octadipole array antenna |
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Application publication date: 20110824 |