CN103280634A - Metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics - Google Patents
Metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics Download PDFInfo
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- CN103280634A CN103280634A CN201310150805XA CN201310150805A CN103280634A CN 103280634 A CN103280634 A CN 103280634A CN 201310150805X A CN201310150805X A CN 201310150805XA CN 201310150805 A CN201310150805 A CN 201310150805A CN 103280634 A CN103280634 A CN 103280634A
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Abstract
The invention relates to a metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics. The metallic waveguide antenna comprises a square opening surface metal waveguide, a dielectric sheet, a rectangular upper arm metal sheet, a rectangular lower arm metal sheet, a microstrip wire and a coaxial wire inner conductor feeding probe, wherein two ends of the metal waveguide are provided with openings, the dielectric sheet is arranged on one inner side wall of the metal waveguide, the upper arm metal sheet and the lower arm metal sheet are arranged on the dielectric sheet and have the same length and width, the microstrip wire is used for connecting the upper arm metal sheet and the lower metal sheet, and the coaxial wire inner conductor feeding probe is connected to the right center point of the microstrip wire. The metallic waveguide antenna has the advantages that the feeding is realized in the middle of the waveguide, the two-way radiation is adopted, circular polarized waves radiated in two opposite directions have the same rotation directions, i.e. the circular polarized waves radiated in the two opposite directions are all left-rotation circular polarized waves or right-rotation circular polarized waves, the metallic waveguide antenna can be manufactured by adopting ordinary metals, the cost is low, the minimum size of the metallic waveguide antenna is greater than the half wavelength of the work frequency, the maximum size is greater than one wavelength, the processing of the designed antenna is convenient, and the influence of the mechanical processing precision on the performance of the metallic waveguide antenna is less.
Description
Technical field
The invention belongs to antenna technical field, particularly a kind of have two-way with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves.
Background technology
Bidirectional radiation refers to that antenna has the radiation of identical energy in two opposite directions.Traditional paster antenna is owing to the existence on floor has unidirectional directional radiation properties, and monopole antenna has the radiation characteristic of horizontal omnidirectional, and they can not produce the directional diagram of bidirectional radiation separately.Yet in some wireless communication systems, such as bridge tunnel communication, mine laneway wireless system, bidirectional radiation directional diagram seem very important, because the channel of these systems itself has elongated relatively pipe characteristic.In addition at radio-frequency recognition system, microcell base station, indoor wireless inserts, and in the systems such as high-speed local area network network, antenna also needs to have the ability of two-way covering.
Circularly polarised wave refers to look along the direction of propagation, the radiated wave that the track of the radiated electric field of antenna changed a circle rotation along with the time.Circularly polarised wave is for line polarization wave, and line polarization wave refers to that electric field is along with the time changes at a line.Compare with line polarization wave, circularly polarised wave has advantage clearly.Antenna in the circular polarization receive-transmit system no longer need polarize as linear polarized antenna and aim at and the polarization coupling, otherwise can not carry out the transmission of signal.Circularly polarised wave changes insensitive to the polarization rotation that causes in the physical motion of transceiver antenna itself and the radio wave propagation process etc., can improve the reliability and stability of channel signal.Thereby the antenna design with two-way circularly polarised wave radiation characteristic plays a part very important in above wireless communication system.Circularly polarised wave can be divided into left-hand circular polarization ripple and right-handed circular polarization ripple according to rotation direction.Traditional slot antenna can be realized the radiation of two-way circularly polarised wave by design, but the rotation direction of slot antenna circularly polarised wave of institute's radiation on two opposite directions is opposite, in other words, if a direction radiation be the left-hand circular polarization ripple, must be the right-handed circular polarization ripple in another opposite direction radiation so.The circularly polarised wave rotation direction can cause like this on one of them radiation direction of antenna because can't be transmitted signal mutually on the contrary.Thereby, have two-way antenna design with gain circle polarized wave radiation characteristics such as revolving and seem that ten minutes gets urgently.
The whole port open that the radiation of metal waveguide antenna is vertically transmitted waveguide realizes, if from the waveguide centre feed, and all opens a way on vertical former and later two directions of propagation, just can realize two-way radiation characteristic.It has low-loss radiating guide, advantages such as big capacity, thereby research has two-way metal waveguide antenna with gain circle polarized wave radiation characteristics such as revolving and the performance of wireless communication system is improved has important function.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of two-way metal waveguide antenna with gain circle polarized wave radiation characteristics such as revolving that has, can be used for microcell base station, mine laneway, bridge tunnel, radio-frequency (RF) identification is in the various wireless communication systems such as high-speed local area network network and indoor wireless access, have and make characteristics simple, low-cost, easy of integration, flexible design, and have two-way same gain circle polarized wave radiation characteristic such as revolve.
To achieve these goals, the technical solution used in the present invention is:
A kind of have two-wayly with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves, and comprising:
The square actinal surface metal waveguide 1 of both ends open;
Be installed in the dieelctric sheet 2 on 1 one madial walls of metal waveguide;
Be installed in upper arm sheet metal 41 and the underarm sheet metal 42 of the as broad as long rectangle on the dieelctric sheet 2, upper arm sheet metal 41 and underarm sheet metal 42 all are 45 ° of angles with metal waveguide 1 each sidewall, and be folded to the actinal surface center of metal waveguide 1, upper arm sheet metal 41 is vertical on the actinal surface cross section of metal waveguide 1 with underarm sheet metal 42;
The microstrip line that connects upper arm sheet metal 41 and underarm sheet metal 42;
And,
Be connected to the coaxial inner conductor feed probes 31 of the positive central point of described microstrip line, the outer conductor of coaxial line is connected on the sidewall of metal waveguide 1.
Described dieelctric sheet 2 width are consistent with metal waveguide 1 actinal surface width, and height is consistent with upper arm sheet metal 41 and underarm sheet metal 42 vertical intervals.
Described upper arm sheet metal 41 and underarm sheet metal 42 2 of dieelctric sheets on the whole at a distance of the quarter-wave guide wavelength.
Described microstrip line comprises first microstrip line 33 of the center that is connected the limit that upper arm sheet metal 41 and dieelctric sheet 2 intersect, be connected second microstrip line 34 of the center on the limit that underarm sheet metal 42 and dieelctric sheet 2 intersect, and the quarter-wave impedance conversion microstrip line 32 that connects first microstrip line 33 and second microstrip line 34, wherein first microstrip line 33 and second microstrip line 34 are isometric, and feed probes 31 is connected on the quarter-wave impedance conversion microstrip line 32.
Described coaxial line is 50 ohm of coaxial lines.
Compared with prior art, antenna of the present invention carries out feed based on square actinal surface metal waveguide at waveguide centre feed rather than a port, and with before and after the direction of propagation all the form of opening to realize bidirectional radiation.This antenna has the radiation characteristic of gain circle polarized wave such as two-way, and has identical rotation direction at the circularly polarised wave of two rightabout institutes radiation, i.e. the circularly polarised wave of two rightabout institutes radiation all is the left-hand circular polarization ripple or all is the right-handed circular polarization ripple.Radiation is two-way with the inherent characteristic that the gain circle polarized wave is the design of this antenna such as revolving.Carry out feed for for convenience two rectangular metal walls, the design adopts microstrip line construction, a dieelctric sheet is installed in waveguide sidewalls front in fixing rectangular metal sheet, its length and waveguide actinal surface equal and opposite in direction, and its height equates with the vertical range of two rectangular metal sheet.Designed microstrip line connects the diagonal of two rectangular metal sheet, and carries out probe feed from the positive center of microstrip line, and the electric current that has been encouraged on such two rectangular metal sheet has identical amplitude and phase place.On the same day alignment during radiation, 90 ° in the electric field that the rectangular metal sheet of the electric field that following rectangular metal sheet encourages on phase place lags behind encourages, under the same day alignment during radiation, 90 ° in the electric field that the rectangular metal sheet of the electric field that top rectangular metal sheet encourages below phase place lags behind encourages, thus realize the identical circularly polarised wave radiation of rotation direction in two opposite directions.The present invention can adopt common metal to make, and cost is very low.Minimum dimension of the present invention is greater than the half wavelength of operating frequency, and full-size is greater than a wavelength, and She Ji antenna is easy to process like this, and its performance is subjected to the influence of machining accuracy less.
Description of drawings
Fig. 1 is the two-way metal waveguide antenna graphics with gain circle polarized wave radiation characteristics such as revolving that has provided by the invention, and solid line is the actual profile of seeing, dotted line is the profile that is blocked.
Fig. 2 is vertical view for the A of Fig. 1 to view.
Fig. 3 is end view for the B of Fig. 1 to view, and dotted line is the profile that is blocked.
Fig. 4 is another kind of end view for the C of Fig. 1 to view.
Fig. 5 be the A of Fig. 1 to the embodiment dimensional drawing of view structure, unit be the millimeter (mm).
Fig. 6 be the B of Fig. 1 to the embodiment dimensional drawing of view structure, unit be the millimeter (mm).
Fig. 7 is the two-way antenna reflection coefficient with gain circle polarized wave radiation characteristics such as revolving of having of Fig. 5-Fig. 6 institute embodiment, axial ratio and gain diagram: (
Stickogram;
Axial ratio figure;
Gain diagram): (a) be stickogram; (b) be axial ratio and gain diagram.
The axial ratio beam pattern of Fig. 8 when to be that having of Fig. 5-Fig. 6 institute embodiment is two-way be operated in 2.44GHz with the antenna that gain circle polarized wave radiation characteristic such as revolves: (
Phi=0 ° of plane axis compares beam pattern;
Phi=90 ° of plane axis is than beam pattern).
The gain pattern of Fig. 9 when to be that having of Fig. 5-Fig. 6 institute embodiment is two-way be operated in 2.44GHz with the antenna that gain circle polarized wave radiation characteristic such as revolves (-: LHCP component gain pattern;---: RHCP component gain pattern): (a) be Z-X planar gain directional diagram; (b) be Z-Y planar gain directional diagram.
Embodiment
Describe embodiments of the present invention in detail below in conjunction with drawings and Examples.
As Fig. 1-shown in Figure 4, the present invention is a kind of to have two-way metal waveguide antenna with gain circle polarized wave radiation characteristics such as revolving, comprises metal waveguide 1, dieelctric sheet 2, upper arm sheet metal 41, underarm sheet metal 42, feed probes 31, first microstrip line 33, second microstrip line 34 and quarter-wave impedance conversion microstrip line 32.
Wherein, metal waveguide 1 is a square tube that is surrounded by sheet metal, and it is two port open up and down, as the radiation port of antenna, make that antenna can bidirectional radiation, its outer wall has certain thickness, this thickness depends on the sheet metal that adopts, and does not rock to guarantee that waveguide integral body is firm.The operating frequency of radiating guide is subjected to the size impact of square actinal surface, because the size of square actinal surface determines the cut-off wavelength of waveguide, and then determines the guide wavelength at operating frequency place.The square actinal surface size of waveguide plays a decisive role to the circular polarization operating frequency, and the waveguide longitudinal size is less to the circular polarization frequency influence, but influences the purity of circular polarization.
Dielectric-slab 2 is installed on 1 one madial walls of metal waveguide, is for convenience two rectangular metal sheet to be carried out constant amplitude cophase detector, and its length and actinal surface size equate that its height equates with the vertical range of upper arm sheet metal 41 and underarm sheet metal 42.
Feed partly adopts the mode of 50 ohm of coaxial feedings, and coaxial inner conductor feed probes 31 is connected to the positive central point of microstrip line, and coaxial outer conductor is connected on the sidewall of metal waveguide.
Microstrip line comprises first microstrip line 33 of the center that is connected the limit that upper arm sheet metal 41 and dieelctric sheet 2 intersect, be connected second microstrip line 34 of the center on the limit that underarm sheet metal 42 and dieelctric sheet 2 intersect, and the quarter-wave impedance conversion microstrip line 32 that connects first microstrip line 33 and second microstrip line 34, wherein first microstrip line 33 and second microstrip line 34 are isometric, feed probes 31 is connected on the quarter-wave impedance conversion microstrip line 32, tie point distance from feeding centre to two rectangular metal sheet equates like this, can realize constant amplitude homophase feed.Quarter-wave impedance conversion microstrip line 32 carries out feed at the positive central point of microstrip line, makes energy carry out transmitted in both directions, also makes upper arm sheet metal 41 and underarm sheet metal 42 obtain constant amplitude cophase detector simultaneously.Quarter-wave impedance conversion microstrip line 32 plays a part impedance conversion and coupling, can make antenna obtain good impedance matching bandwidth.
Upper arm sheet metal 41 and underarm sheet metal 42 are installed on the dieelctric sheet 2, be rectangle, and have same widths and length, the angle of the two and metal waveguide 1 each sidewall is 45 °, and be folded to the center of radiation actinal surface, in order to encouraged two mutually orthogonal electric field patterns of waveguide.From horizontal plane, two rectangular metal sheet are vertical mutually, are folded to square actinal surface center position; From vertical plane, two rectangular metal sheet are at a distance of the distance of quarter-wave guide wavelength, to realize 90 ° of two-way phase differences.So, two electric fields that rectangular metal sheet encouraged are mutually orthogonal, on the same day alignment during radiation, the electric field that underarm sheet metal 42 has been encouraged lags behind 90 ° in the electric field that upper arm sheet metal 41 encourages in phase place, under the same day alignment during radiation, the electric field that upper arm sheet metal 41 has been encouraged lags behind 90 ° in the electric field that underarm sheet metal 42 encouraged in phase place, thereby at two opposite identical circularly polarised waves of direction radiation rotation direction.
This structure specifies as follows:
Realize frequency range such as the 2.4-GHz WLAN (wireless local area network) frequency range (2.40GHz-2.48GHz) of work at first as requested, the square caliber size of design metal waveguide 1, and determine that the spacing of two rectangular metal sheet is 1/4th guide wavelengths; Secondly, the height of the position by adjusting the upper arm sheet metal 41 that inserts metal waveguide 1 inside and metal waveguide 1 is realized the radiation of two-way equal energy; The 3rd, insert underarm sheet metal 42 and realize two-way circularly polarised wave radiation with gains such as revolving.The width of two rectangular metal sheet of design and spacing are to optimize the circular polarization degree of required frequency range; By introducing microstrip line construction two rectangular metal sheet are carried out feed and Antenna Impedance Matching at last.
It is common copper sheet that material is adopted in the antenna design, the each several part size of its design such as Fig. 5-shown in Figure 6, the actinal surface length of side 76mm of metal waveguide 1, highly be 143mm, the length of upper arm sheet metal 41 and underarm sheet metal 42 is 40mm, and width is 16mm, vertical interval 48mm, first microstrip line 33 and second microstrip line, 34 cross section chis directly are 2.7mm, and the length of quarter-wave impedance conversion microstrip line 32 is 36mm, cross section chi footpath 1.1mm.
With the two-way reflection coefficient with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves of having of Fig. 5-size design shown in Figure 6, axial ratio bandwidth and gain are as shown in Figure 7, the reflection coefficient of this antenna＜-bandwidth of 10dB is at 1.92-2.63GHz(710MHz), the bandwidth of its axial ratio＜3dB is at 2.34-2.54GHz(200MHz), the common bandwidth of-10dB reflection coefficient and 3dB axial ratio is 2.34-2.54GHz(200MHz), can cover 2.4-GHz WLAN (wireless local area network) working frequency range, gain in the common bandwidth is between 4.1-4.6dB, and fluctuating is 0.5dB.
Axial ratio wave beam when being operated in 2.44GHz with the two-way metal waveguide antenna with gain circle polarized wave radiation characteristics such as revolving of having of Fig. 5-size design shown in Figure 6 as shown in Figure 8, on Phi=0 ° and two planes of Phi=90 degree, the axial ratio wave beam of this antenna is all realized good axial ratio and circular polarization degree at Z axle 0 degree and two opposite directions of 180 degree, and its 3dB axial ratio beamwidth is 60 degree.
With the two-way gain pattern with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves of having of Fig. 5-size design shown in Figure 6 as shown in Figure 9.At working band center frequency point 2.44GHz, two-way left-hand circular polarization wave radiation is all realized on Z-X plane and Z-Y plane, and has equal gain at 0 ° on Z axle and 180 ° of both directions.Main lobe 3dB beamwidth is approximately 60 °, and the 3dB powerbeam can complete covering 3dB axial ratio wave beam.
Metal waveguide antenna of the present invention can be applied in the various wireless communication system because it has two-way advantage with gain circle polarized wave radiation such as revolving, such as radio-frequency (RF) identification, microcell base station, indoor wireless inserts, wireless systems such as high-speed local area network can be adjusted the size of described antenna according to the relevant work frequency.
Claims (5)
1. one kind has two-way metal waveguide antenna with gain circle polarized wave radiation characteristics such as revolving, it is characterized in that, comprising:
The square actinal surface metal waveguide (1) of both ends open;
Be installed in the dieelctric sheet (2) on (1) madial wall of metal waveguide;
Be installed in upper arm sheet metal (41) and the underarm sheet metal (42) of the as broad as long rectangle on the dieelctric sheet (2), upper arm sheet metal (41) and underarm sheet metal (42) all are 45 ° of angles with each sidewall of metal waveguide (1), and be folded to the actinal surface center of metal waveguide (1), upper arm sheet metal (41) is vertical on the actinal surface cross section of metal waveguide (1) with underarm sheet metal (42);
The microstrip line that connects upper arm sheet metal (41) and underarm sheet metal (42);
And,
Be connected to the coaxial inner conductor feed probes (31) of the positive central point of described microstrip line, the outer conductor of coaxial line is connected on the sidewall of metal waveguide (1).
According to claim 1 have two-way with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves, it is characterized in that, described dieelctric sheet (2) width is consistent with metal waveguide (1) actinal surface width, and height is consistent with upper arm sheet metal (41) and underarm sheet metal (42) vertical interval.
According to claim 1 have two-way with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves, it is characterized in that, described upper arm sheet metal (41) and underarm sheet metal (42) in dieelctric sheet (2) institute on the whole at a distance of the quarter-wave guide wavelength.
According to claim 1 have two-way with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves, it is characterized in that, described microstrip line comprises first microstrip line (33) of the center that is connected the limit that upper arm sheet metal (41) and dieelctric sheet (2) intersect, be connected second microstrip line (34) of the center on the crossing limit of underarm sheet metal (42) and dieelctric sheet (2), and the quarter-wave impedance conversion microstrip line (32) that connects first microstrip line (33) and second microstrip line (34), wherein first microstrip line (33) and second microstrip line (34) are isometric, and feed probes (31) is connected on the central point of quarter-wave impedance conversion microstrip line (32).
5. according to claim 1 have two-wayly with the metal waveguide antenna that gain circle polarized wave radiation characteristic such as revolves, and it is characterized in that described coaxial line is 50 ohm of coaxial lines.
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| CN201310150805XA CN103280634A (en) | 2013-04-26 | 2013-04-26 | Metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics |
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| CN201310150805XA CN103280634A (en) | 2013-04-26 | 2013-04-26 | Metallic waveguide antenna with two-way identical-rotation equal gain circular polarized wave radiation characteristics |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216993A (en) * | 2020-09-23 | 2021-01-12 | 电子科技大学 | Ultra-thin ultra-wideband chessboard structure RCS reduced super surface |
| CN112838358A (en) * | 2020-12-31 | 2021-05-25 | 华南理工大学 | Two-way radiation co-rotation direction double circular polarized antenna based on 3D printing technology |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102820534A (en) * | 2011-06-09 | 2012-12-12 | 香港城市大学深圳研究院 | Broadband circular polarization patch antenna |
| CN102884675A (en) * | 2010-03-12 | 2013-01-16 | Agc汽车美洲研发公司 | Antenna system including a circularly polarized antenna |
-
2013
- 2013-04-26 CN CN201310150805XA patent/CN103280634A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102884675A (en) * | 2010-03-12 | 2013-01-16 | Agc汽车美洲研发公司 | Antenna system including a circularly polarized antenna |
| CN102820534A (en) * | 2011-06-09 | 2012-12-12 | 香港城市大学深圳研究院 | Broadband circular polarization patch antenna |
Non-Patent Citations (1)
| Title |
|---|
| YANG ZHAO等: "A Waveguide Antenna With Bidirectional Circular Polarizations of the Same Sense", 《IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112216993A (en) * | 2020-09-23 | 2021-01-12 | 电子科技大学 | Ultra-thin ultra-wideband chessboard structure RCS reduced super surface |
| CN112838358A (en) * | 2020-12-31 | 2021-05-25 | 华南理工大学 | Two-way radiation co-rotation direction double circular polarized antenna based on 3D printing technology |
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Application publication date: 20130904 |