CN1965442A - Microstrip antenna - Google Patents
Microstrip antenna Download PDFInfo
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- CN1965442A CN1965442A CN 200580012517 CN200580012517A CN1965442A CN 1965442 A CN1965442 A CN 1965442A CN 200580012517 CN200580012517 CN 200580012517 CN 200580012517 A CN200580012517 A CN 200580012517A CN 1965442 A CN1965442 A CN 1965442A
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Abstract
The invention provides an antenna having a relatively wide bandwidth of operation. The antenna may be a printed circuit board dipole antenna having a ladder balun feed network coupled to a ground plane and dipole radiating elements located about one-quarter wavelength from an edge of the ground plane. The ground plane acts as a reflector to increase antenna gain. A plurality of the antennas may be provided in an array configuration with antennas being located in relatively close proximity and being isolated from other antennas in the array. An array of antennas may be used to provide a wireless link in a wireless network utilizing a IEEE 802.1X frequency band.
Description
Technical field
The present invention relates to microstrip antenna, more specifically, relate to micro-strip dipole antenna with ladder type balanced-unbalanced conversion current feed department (balun feed).
Background technology
Though printed circuit board (PCB), dipole antenna all are the excellent function antennas, tend to narrow relatively bandwidth operation.Narrow bandwidth of operation has limited printed circuit board (PCB), the application of dipole antenna in following equipment, and described equipment is to operate required equipment on the big bandwidth such as IEEE 802.11a frequency band (5.15 to 5.85GHz).Thereby, wish printed circuit board (PCB), dipole antenna that structure has wide bandwidth of operation.
Summary of the invention
The invention provides a kind of antenna with wide relatively bandwidth of operation.This antenna can be the printed circuit board (PCB) dipole antenna, this printed circuit board (PCB) dipole antenna have the ladder type balanced-unbalanced conversion feeding network that is coupled with stratum (ground plane) and be provided with the edge on stratum at a distance of about quarter-wave dipole radiation element.Reflector is served as on this stratum, to increase antenna gain.A plurality of antennas can be set to following array structure, wherein, antenna be provided with relative with other antenna in the array near and keep apart.In one embodiment, aerial array can be used for providing Radio Link at the wireless network that utilizes IEEE 802.1X frequency band.
In one embodiment, provide a kind of antenna, this antenna comprises: (a) feeding network; (b) stratum, this stratum are set near described feeding network, and separate by dielectric substance and described feeding network, and are being electrically coupled to described feeding network when described feeding network provides the RF signal; And (c) a plurality of radiant elements, described a plurality of radiant elements operationally with described feeding network interconnection, and operationally send and receive the RF signal of the frequency that has in the scheduled frequency range.Described frequency range has centre frequency, and in described a plurality of radiant element each all with the interconnection of described feeding network, and be set to the about quarter-wave of edge under described centre frequency with described stratum.Described stratum can be operated to serve as the reflector with respect to described radiant element in described frequency range, thus, provides the gain of enhancing for antenna in described frequency range.
The feeding network of one embodiment comprises operationally changes electricity supply element and twin lead transmission with the ladder type balanced-unbalanced of RF current feed department interconnection, and each circuit is operationally changed the side interconnection of electricity supply element with described ladder type balanced-unbalanced.Described ladder type balanced-unbalanced conversion electricity supply element can have: first shank, this first shank have operationally the feed end with described RF current feed department interconnection; With second shank, this second shank and described first shank are spaced apart, and at least by first Connection Element and second Connection Element operationally with described first leg interconnects.In described first Connection Element and described second Connection Element each can have the length of about 1/2nd wavelength under described dielectric described centre frequency.Alternatively, described first Connection Element can have first length, and described second Connection Element can have second length greater than described first length, and thus, described first shank and described second shank divide fork each other with respect to described distributing point.
In another embodiment, described a plurality of radiant elements comprise: first dipole element, and this first dipole element is connected to first circuit of described twin lead transmission; With second dipole element, this second dipole element is connected to second circuit of described twin lead transmission.Although it is also non-essential,, described first dipole element and described second dipole element be symmetry substantially.
Another embodiment of the present invention provides a kind of aerial array, this aerial array comprises a plurality of antennas, in described a plurality of antenna each all has the gain of about 5dBi and covers about 5.15GHz to the interior impedance bandwidth of the frequency range of about 5.85GHz, and wherein, in described a plurality of antenna each all is set near other antenna in described a plurality of antennas, and all has at least approximately between in described a plurality of antennas each-isolation of 20dB.In one embodiment, each antenna all comprises: (i) feeding network, this feeding network comprise the dual-element half-wave ladder type balanced-unbalanced converter section that negative-phase sequence curent is provided to the unbalanced double transmission line; (ii) stratum, this stratum are set near described feeding network, and spaced apart by dielectric substance and described feeding network, and are being electrically coupled to this feeding network when described feeding network provides the RF signal; And (iii) dipole radiation element, this dipole radiation element operationally with described twin lead transmission in each interconnection.In described a plurality of antenna each can be included on the single printed circuit board.
Above-mentioned and further feature, effectiveness and advantage of the present invention will be apparent from the following description more specifically to the illustrated the preferred embodiments of the present invention of accompanying drawing.
Description of drawings
Accompanying drawing is merged in and constitutes the part of this specification, illustration embodiments of the invention, and be used from specification one and explain principle of the present invention.Utilize the identical items in the same numeral indication accompanying drawing.
Fig. 1 is the illustration figure of the antenna of one embodiment of the invention;
Fig. 2 is the illustration figure of the feeding network of another embodiment of the present invention;
Fig. 3 is the illustration figure of the logarithm period feeding network of one embodiment of the invention;
Fig. 4 is the illustration figure of the logarithm period feeding network of another embodiment of the present invention; And
Fig. 5 is the illustration figure of the aerial array of another embodiment of the present invention.
Embodiment
Below, describe the present invention in detail.At first, with reference to Fig. 1, show microstrip antenna 100.Microstrip antenna 100 comprises feeding network 102 and a plurality of radiant element 104.Feeding network 102 is coupled with stratum 106.Feeding network 102 is illustrated as ladder type balanced-unbalanced converter section.Ladder type balanced-unbalanced conversion current feed department has distributing point 108, first shank 110 and second shank 112.Though described shank is shown is substantially parallel, shank 110 with 112 can with respect to distributing point 108 join or bifurcated to realize different effects.Distributing point 108 is connected to the feed end of first shank 110.As shown in the figure, length is that first Connection Element 114 of W1 connects first shank and second shank at the feed end place of second shank 112.Second Connection Element, 116 same first shank and second shanks of connecting.Because shank 110 and 112 is substantially parallel, so second Connection Element 116 has length W2.Under shank 110 and 112 substantially parallel situations, length W2 equals W1, but under the situation of meeting mould assembly or branch type shank, W2 may be greater than or less than W1.The distance of second Connection Element 116 and first Connection Element 114 is L1.Length L 1 can change between Connection Element.Though show two Connection Elements, can be more or less Connection Element as optional design item.Increase the quantity of Connection Element, can increase the bandwidth of antenna 100 usually.Just over last Connection Element (in this case, this last Connection Element is second Connection Element 116), first shank 110 stops at terminating point 118, and second shank stops at terminating point 120.
Pairs of transmission line road 122,124 can be bonded to biradial distributing point 126,128 from terminating point 118 and 120 respectively.The distance of biradial distributing point 126,128 spaced apart W3.Width W 3 helps the transmission from a pair of microstrip, and in one embodiment, this a pair of microstrip differs 180 degree with respect to the part of balanced twin lead transmission line (it is doublet radiator 138 and 140 feeds) on phase place.Radiation distributing point 126 and 128 is connected to symmetrical radiant element, and in this case, described symmetrical radiant element is illustrated as dipole antenna 130 and 132.Though show dipole,, can use the radiant element of other type, as the Yagi antenna of folded dipole, additional passive device, V glyph shape antenna etc.The length that symmetrical dipole antenna oscillator 130 and 132 has formation does not have the balanced twin lead transmission line on stratum is stratum radiant element 138 and two 180 degree of the 140 conversions phase difference microstrip 126 and 128 that the first radiation shank, 134,136, the first radiation shanks, 134,136 usefulness of L2 have length L 3.The resonance frequency of 138 and 140 length decision antenna.Shank 138 and 140 has width W 5, and width W 5 may be influential to antenna match.Shank 138 and 140 has width W 5, is for convenience's sake in this case, but is not limited to W5.Shank 138 and 140 can equate on length, but this neither be essential, and length can be adjusted to and is more suitable for concrete application.The distance of shank 134 and 136 spaced apart W4.
Stratum 106 has width W g, length L g, and length L r.Length L g normally from distributing point 108 to anti-phase (promptly, the length of two microstrip 126 phase phasic difference 180 degree) and 128 microstrip feed network 102, this is anti-phase for converting this double-circuit 134 and the 136 required phasings that do not have the physics stratum but have virtual stratum between twin lead transmission 134 and 136 to.Length L r be circuit board only on upper surface, have metallic conductor 134,136,138 and 140 and without any the remainder of stratum substrate.Dielectric base plate is positioned on whole length L g and the Lr, but stratum 106 exists only in the zone that is limited by Wg and Lg.Reflector is served as at the edge of the boundary of Lg and Lr in stratum 106, its can increase antenna gain and for antenna pattern (radiation pattern) provider to.
First shank 110, second shank 112, first Connection Element 114 and second Connection Element 116 all have width W.Width W is utilized the choice of technology well known in the art, at this it is not described further.Yet, have been found that and select to provide the width effect of 50 ohm transmission line fine.The length L 1 that first Connection Element 114 and second Connection Element 116 are separated is preferably about 1/4 of wavelength in the described dielectric.For parallel legs, length W1 and W2 are preferably about 1/2 of wavelength in the described dielectric.For meeting mould assembly or branch type shank, this distance should be to form for example required distance of logarithm period balanced-unbalanced converter section.
Width W 3 to W5 can change, with 126,128 impedances of change biradial distributing point, and littler extension dipole input impedance.Impedance matching is provided to this changing unit.Length L 2 is generally about 1/4 wavelength in the free space at center operations frequency band place.Length L 3 is generally about 1/4 wavelength in the free space at center operations frequency band place.L2 can change according to the conventional dipole method collection relevant with frequency of operation with L3.
Below, with reference to Fig. 2, example illustrates feeding network 200 according to another embodiment of the present invention.In this embodiment, ladder type balanced-unbalanced conversion feeding network 200 has six Connection Elements 204 that first shank 208 are connected to second shank 212.The Connection Element 204 of this embodiment separates equably along first shank 208 and second shank 212.Distance between the Connection Element 204 is 1/4 wavelength, but can the distance between the described Connection Element 204 be regulated based on the application of wherein using the antenna that is associated with feeding network 200.And Connection Element can be spaced apart unevenly along first shank 208 and second shank 212.
Fig. 3 and 4 illustrations the logarithm period balanced-unbalanced conversion feeding network 220,224 of other embodiment of the present invention.As shown in Figure 3, first shank 228 and second shank 232 can be the meeting mould assembly shanks between distributing point and transmission line.As shown in Figure 4, first shank 240 and second shank 244 can divide fork to transmission line from distributing point.
As shown in Figure 5, antenna described here can be used for aerial array 300.As shown in Figure 5, array 300 comprises a plurality of antennas 100, is six (6) individual antennas 100 in this case.Also can comprise more or less antenna 100.The antenna amount that comprises in array is to wish the function of diversified pattern range or the function of the gain under the situation of phased array design to a great extent.Though array 300 is illustrated as circular array (its help variation operation),, also can adopt other arrangement of the antenna 100 in the array, for instance, as the array of quadrate array, rectangular array, oval-shaped array, random shape etc.In one embodiment, the antenna 100 in the array 300 is relatively near other antenna in the array 300.Thus, can be as desirable in many application, array 300 relative compact.In this embodiment, each antenna 100 all is an antenna described with reference to Figure 1, and array 300 is operated in the frequency range of about 5.15-5.85GHz.Yet, should be appreciated that the antenna that in this array 300, also can use other type.In this embodiment, each antenna 100 all has the gain of about 5dBi, and has about at least-20dB isolation between each antenna oscillator 100.As mentioned above, antenna 100 is relatively near other antenna 100 in the array 300, and in one embodiment, the oscillator in the antenna 100 can be arranged in about one to two wavelength by centre frequency of the oscillator in other antenna 100.In one embodiment, aerial array 200 is used for providing in the system of Radio Link at IEEE 802.1X network.
Though specifically illustrate and described the present invention with reference to embodiments of the invention,, it will be appreciated by those skilled in the art that under the situation that does not break away from the spirit and scope of the present invention, can carry out various other changes to the present invention in form and details.
Claims (19)
1, a kind of antenna, described antenna comprises:
Feeding network, described feeding network comprises:
Operationally change electricity supply element with the ladder type balanced-unbalanced of RF current feed department interconnection;
Twin lead transmission, each circuit are operationally changed the side interconnection of electricity supply element with described ladder type balanced-unbalanced;
Stratum, this stratum are set near described feeding network, and spaced apart by dielectric substance and described feeding network, and are being electrically coupled to described feeding network when described feeding network provides the RF signal;
A plurality of radiant elements, described a plurality of radiant element operationally interconnects with described feeding network, and can operate to send and to receive RF signal with the frequency in the scheduled frequency range, described frequency range has centre frequency, in described a plurality of radiant element each all operationally with described twin lead transmission in an interconnection, and
Wherein, described stratum can be operated to serve as the reflector with respect to described radiant element in described frequency range, thus, provides the gain of enhancing for antenna in described frequency range.
2, antenna according to claim 1, wherein, described ladder type balanced-unbalanced conversion electricity supply element comprises:
First shank, this first shank have operationally the feed end with described RF current feed department interconnection;
Second shank, this second shank and described first shank are spaced apart, and at least by first Connection Element and second Connection Element operationally with described first leg interconnects.
3, antenna according to claim 2, wherein, each in described first Connection Element and described second Connection Element all has the length of about 1/2nd wavelength under the described centre frequency in the described dielectric.
4, antenna according to claim 2, wherein, described first Connection Element has first length, and described second Connection Element has second length greater than described first length, thus, described first shank and described second shank divide fork each other with respect to described distributing point.
5, antenna according to claim 2, wherein, described first Connection Element connects described first shank and described second shank in first distance with respect to described distributing point, and described second Connection Element connects described first shank and described second shank at the second distance place with respect to described distributing point, wherein, described first distance and described second distance are based on that the hope bandwidth of antenna selects.
6, antenna according to claim 5, wherein, the difference between described first distance and the described second distance is the about quarter-wave under the described centre frequency in the described dielectric.
7, antenna according to claim 1, wherein, described a plurality of radiant elements are set to the about quarter-wave of edge under described centre frequency with described stratum.
8, antenna according to claim 1, wherein, described a plurality of radiant elements comprise:
First dipole element, this first dipole element is connected to first circuit of described twin lead transmission; With
Second dipole element, this second dipole element is connected to second circuit of described twin lead transmission.
9, antenna according to claim 8, wherein, described first dipole element and described second dipole element be symmetry substantially.
10, antenna according to claim 8, wherein, each in the described twin lead transmission all provides the RF signal that differs about 1/2nd wavelength with respect to another twin lead transmission on phase place.
11, antenna according to claim 8, wherein, each in described first dipole element and described second dipole element all comprises:
The radiation shank, this radiation shank forms the transmission line on no stratum; With
Radiant element, this radiant element operationally with described radiation leg interconnects, the width that provides the input impedance of hope to select for to described dipole element all is provided for described radiant element and described radiation shank.
12, a kind of aerial array, described aerial array comprises:
A plurality of antennas, each antenna all comprises:
Feeding network, this feeding network comprise the ladder type balanced-unbalanced converter section that negative-phase sequence curent is provided to the unbalanced double transmission line;
Stratum, this stratum are set near described feeding network, and spaced apart by dielectric substance and described feeding network, and are being electrically coupled to described feeding network when described feeding network provides the RF signal; And
Dipole radiation element, this dipole radiation element operationally with described twin lead transmission in each interconnection,
Wherein, in described a plurality of antenna each all has the gain of about 5dBi and covers the impedance bandwidth of about 5.15GHz to the frequency range of about 5.85GHz, and wherein, in described a plurality of antenna each all is set near other antenna in described a plurality of antennas, and all has at least approximately between in described a plurality of antennas each-isolation of 20dB.
13, aerial array according to claim 12, wherein, each in described a plurality of antennas all is included on the single printed circuit board.
14, aerial array according to claim 12, wherein, each in the described dipole radiation element, all with described aerial array in another radiant element of another antenna at a distance of less than about two wavelength under the center frequency of operation of this aerial array.
15, aerial array according to claim 12, wherein, the described dipole radiation element of each in described a plurality of antennas all with described stratum at a distance of about quarter-wave.
16, aerial array according to claim 12, wherein, each in described a plurality of antennas is all pressed the planar array setting, and wherein, described planar array can provide the variation operation.
17, aerial array according to claim 12, wherein, the described ladder type balanced-unbalanced converter section of each in described a plurality of antennas all comprises dual-element half-wave ladder type balanced-unbalanced converter section.
18, aerial array according to claim 17, wherein, the described dual-element half-wave ladder type balanced-unbalanced converter section of each in described a plurality of antennas all comprises:
First shank, this first shank have operationally the feed end with the interconnection of array RF current feed department; With
Second shank, this second shank and described first shank are spaced apart, and at least by first Connection Element and second Connection Element operationally with described first leg interconnects.
19, aerial array according to claim 18, wherein, each in described first Connection Element and described second Connection Element all has the length of about 1/2nd wavelength under the centre frequency of the described frequency range in the described dielectric substance.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56503204P | 2004-04-23 | 2004-04-23 | |
| US60/565,032 | 2004-04-23 | ||
| US10/907,964 | 2005-04-22 |
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| Publication Number | Publication Date |
|---|---|
| CN1965442A true CN1965442A (en) | 2007-05-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580012517 Pending CN1965442A (en) | 2004-04-23 | 2005-04-25 | Microstrip antenna |
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| CN (1) | CN1965442A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867090A (en) * | 2010-02-10 | 2010-10-20 | 成都九洲迪飞科技有限责任公司 | Microstrip dipole antenna with feed network and longitudinal groove |
| CN103296394A (en) * | 2012-03-01 | 2013-09-11 | 深圳光启创新技术有限公司 | Antenna device |
| CN105186105A (en) * | 2015-08-27 | 2015-12-23 | 鲁勇 | General type internet-of-things (IOT) antenna |
| US9515377B2 (en) | 2011-12-16 | 2016-12-06 | Huawei Technologies Co., Ltd. | Antenna apparatus, antenna device and signal transmitting apparatus |
| CN107546486A (en) * | 2016-06-23 | 2018-01-05 | 康普技术有限责任公司 | Antenna feed elements with constant reverse phase |
| CN109087466A (en) * | 2018-07-27 | 2018-12-25 | 江苏瑞银科技有限公司 | Huimin financial service terminal, financial service interacted system and working method |
| WO2019056386A1 (en) * | 2017-09-25 | 2019-03-28 | 华为技术有限公司 | Antenna device, and terminal apparatus |
| CN110197948A (en) * | 2019-06-06 | 2019-09-03 | 天通凯美微电子有限公司 | A kind of tunable antenna and mobile communication electronic equipment |
| CN110799099A (en) * | 2017-04-28 | 2020-02-14 | 费斯四工程部公司 | Pill antenna system |
| WO2021000180A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Wifi antenna and wireless communication device |
-
2005
- 2005-04-25 CN CN 200580012517 patent/CN1965442A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867090A (en) * | 2010-02-10 | 2010-10-20 | 成都九洲迪飞科技有限责任公司 | Microstrip dipole antenna with feed network and longitudinal groove |
| US9515377B2 (en) | 2011-12-16 | 2016-12-06 | Huawei Technologies Co., Ltd. | Antenna apparatus, antenna device and signal transmitting apparatus |
| CN103296394A (en) * | 2012-03-01 | 2013-09-11 | 深圳光启创新技术有限公司 | Antenna device |
| CN105186105A (en) * | 2015-08-27 | 2015-12-23 | 鲁勇 | General type internet-of-things (IOT) antenna |
| US10950947B2 (en) | 2016-06-23 | 2021-03-16 | Commscope Technologies Llc | Antenna feed elements with constant inverted phase |
| CN107546486A (en) * | 2016-06-23 | 2018-01-05 | 康普技术有限责任公司 | Antenna feed elements with constant reverse phase |
| CN107546486B (en) * | 2016-06-23 | 2021-06-29 | 康普技术有限责任公司 | Antenna feed element with constant reverse phase |
| CN110799099B (en) * | 2017-04-28 | 2022-09-20 | 费斯四工程部公司 | Pill antenna system |
| CN110799099A (en) * | 2017-04-28 | 2020-02-14 | 费斯四工程部公司 | Pill antenna system |
| WO2019056386A1 (en) * | 2017-09-25 | 2019-03-28 | 华为技术有限公司 | Antenna device, and terminal apparatus |
| US10985458B2 (en) | 2017-09-25 | 2021-04-20 | Huawei Technologies Co., Ltd. | Antenna apparatus and terminal device |
| CN109087466B (en) * | 2018-07-27 | 2021-02-26 | 江苏瑞银科技有限公司 | Citizen-benefitting financial service terminal, financial service interconnection system and working method |
| CN109087466A (en) * | 2018-07-27 | 2018-12-25 | 江苏瑞银科技有限公司 | Huimin financial service terminal, financial service interacted system and working method |
| CN110197948A (en) * | 2019-06-06 | 2019-09-03 | 天通凯美微电子有限公司 | A kind of tunable antenna and mobile communication electronic equipment |
| WO2021000180A1 (en) * | 2019-06-30 | 2021-01-07 | 瑞声声学科技(深圳)有限公司 | Wifi antenna and wireless communication device |
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Open date: 20070516 |