CN103247858A - Metallic waveguide antenna with characteristics of bi-direction synchronous rotation and double circular polarization wave radiation - Google Patents
Metallic waveguide antenna with characteristics of bi-direction synchronous rotation and double circular polarization wave radiation Download PDFInfo
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- CN103247858A CN103247858A CN201310150890XA CN201310150890A CN103247858A CN 103247858 A CN103247858 A CN 103247858A CN 201310150890X A CN201310150890X A CN 201310150890XA CN 201310150890 A CN201310150890 A CN 201310150890A CN 103247858 A CN103247858 A CN 103247858A
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Abstract
A metallic waveguide antenna with the characteristics of bi-direction synchronous rotation and double circular polarization wave radiation includes a square actinal surface metallic waveguide provided with openings at the two ends, a dielectric slab mounted on the inner side wall of the metallic waveguide, an upper rectangular arm sheetmetal and a lower rectangular arm sheetmetal with the same length and width and mounted on the dielectric slab, and a 180-degree annular coupler network connecting the upper arm sheetmetal with the lower arm sheetmetal and provided with four ports for feeding, wherein a first feeding port and a second feeding port are arranged on the 180-degree annular coupler network. According to the invention, as the double-port feeding structure is adopted, the double circular polarization wave radiation is realized, and circular polarization wave in each rotating direction has the radiation characteristics of bi-direction synchronous rotation and bi-directional equal gain.
Description
Technical field
The invention belongs to antenna technical field, particularly a kind of have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic.
Background technology
The polarization of electromagnetic wave characteristic comprises linear polarization and circular polarization, and line polarization wave refers to that electric field is along with the time changes at a line.And circularly polarised wave is for line polarization wave, and it refers to along the direction of propagation look, the radiated wave that the track of antenna institute radiated electric field changed a circle rotation along with the time.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 and mismatch etc., can improve the reliability and stability of channel signal.Circularly polarised wave can be divided into left-hand circular polarization ripple and right-handed circular polarization ripple according to rotation direction, and the difference of the two is that the rotation direction of circularly polarised wave is opposite.
The double-circle polarization wave antenna refers to that antenna itself can realize left-hand circular polarization ripple and right-handed circular polarization ripple simultaneously.Traditional transmitter and receiver antenna are separated from each other, and are the different antenna systems of two covers.When transmission antennas transmit left-hand circular polarization ripple, it is that the right-handed circular polarization ripple receives that reception antenna adopts the circularly polarised wave of opposite rotation direction, to reduce the isolation between the dual-mode antenna.Have left-hand circular polarization and right-handed circular polarization simultaneously if design an antenna, and have the good isolation degree between two kinds of circular polarization, this antenna itself can be finished transmission-receiving function separately simultaneously so, thereby reduces the overall complexity of antenna system widely.In addition, the circularly polarised wave that can realize two kinds of rotation directions simultaneously can be realized the polarization diversity of signal when receiving signal, improves channel capacity.The design of double-circle polarization wave antenna is whether two isolations between the port are enough good.
Bidirectional radiation refers to that antenna has the radiation of identical energy in two opposite directions.In some wireless communication systems, such as bridge tunnel communication, the mine laneway wireless system, it is very important that the bidirectional radiation directional diagram seems, because the channel of these systems itself has elongated relatively pipe characteristic, bidirectional radiation is the distributing signal energy effectively, improves energy utilization ratio.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.Stability and reliability with antenna signal in the above various wireless communication of raising system of two-way circularly polarised wave radiation characteristic play a part very important.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 rounding polarized wave radiation characteristic and seem that ten minutes gets urgently.
The whole port open that the radiation of metal waveguide antenna is vertically transmitted waveguide realizes that by centre feed, two transmission directions are opened a way simultaneously and can be realized bidirectional radiation.It has low-loss radiating guide, advantages such as big capacity, thereby research have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic improves in the performance of wireless communication system, the reduction of system complexity etc. 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 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, based on square actinal surface metal waveguide, and two ends are opened a way to realize bidirectional radiation simultaneously, the present invention adopts the feed structure of dual-port to realize the double-circle polarization wave radiation, and the circularly polarised wave of every kind of rotation direction all has two-way with revolving and the two-way radiation characteristic that gains that waits.
To achieve these goals, the technical solution used in the present invention is:
A kind of have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, 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 51 and the underarm sheet metal 52 of the as broad as long rectangle on the dieelctric sheet 2, upper arm sheet metal 51 and underarm sheet metal 52 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 51 is vertical on the actinal surface cross section of metal waveguide 1 with underarm sheet metal 52;
Connect upper arm sheet metal 51 and underarm sheet metal 52, two sheet metals are carried out 180 ° of annular coupler networks of feed;
And,
Be connected to first feed port 31 and second feed port 32 on described 180 ° of annular coupler networks.
Described dieelctric sheet 2 width are consistent with metal waveguide 1 actinal surface width, and height is consistent with upper arm sheet metal 51 and underarm sheet metal 52 vertical intervals.
Described upper arm sheet metal 51 and underarm sheet metal 52 2 of dieelctric sheets on the whole at a distance of the quarter-wave guide wavelength.
Described 180 ° of annular coupler networks comprise:
Length is the annular microstrip line 47 of 1.5 guide wavelengths;
Be connected to first microstrip line 41, the 4th microstrip line 44, second microstrip line 42 and the 3rd microstrip line 43 in annular microstrip line 47 outsides in turn, wherein annular microstrip line 47 length between annular microstrip line 47 length, second microstrip line 42 and the 3rd microstrip line 43 between annular microstrip line 47 length, first microstrip line 41 and the 3rd microstrip line 43 between first microstrip line 41 and the 4th microstrip line 44 are 1/4th guide wavelengths.
Described first microstrip line 41, the 4th microstrip line 44, second microstrip line 42 and the 3rd microstrip line 43 all have 50 ohmages.
Described 180 ° of annular coupler networks also comprise:
Connect upper arm sheet metal 51 and the central point of dieelctric sheet 2 intersection edges and the 5th microstrip line 45 of the 3rd microstrip line 43; And
Connect underarm sheet metal 52 and the central point of dieelctric sheet 2 intersection edges and the 6th microstrip line 46 of the 4th microstrip line 44;
Wherein, the 5th microstrip line 45 and the 6th microstrip line 46 are quarter-wave impedance conversion microstrip line.
Described first feed port 31 is arranged on first microstrip line 41, and described second feed port 32 is arranged on second microstrip line 42.
Described first feed port 31 and second feed port 32 are connected the inner wire of 50 ohm of coaxial feed probe respectively, and the outer conductor of coaxial probe is connected on the dieelctric sheet 2.
Compared with prior art, the present invention is radiation-curable two-wayly to can be used for microcell base station with the rounding polarized wave, mine laneway, and 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.The present invention can adopt common metal to make, cost is very low, its performance is subjected to the influence of machining accuracy less, have metal waveguide structure, simple and convenient, low-cost, easy of integration, the flexible design of processing, two-way same advantage of revolving with the double-circle polarization wave radiation, be applicable to the design of antenna in the various wireless communication system.
Description of drawings
Fig. 1 for provided by the invention have two-way with revolve, the metal waveguide antenna graphics of double-circle polarization wave radiation characteristic, 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 be having of Fig. 5-Fig. 6 institute embodiment two-way with revolve, the metal waveguide antenna axial ratio performance plot of double-circle polarization wave radiation characteristic: (
: 31 excitations of first feed port;
: 32 excitations of second feed port); Axial ratio figure when Fig. 7 (a) is 31 excitations of first feed port; Axial ratio figure when Fig. 7 (b) is 3 excitations of second feed port.
Fig. 8 be having of Fig. 5-Fig. 6 institute embodiment two-way with revolve, metal waveguide antenna dual-port reflection coefficient, isolation and the gain diagram of double-circle polarization wave radiation characteristic: (
: the reflection coefficient during 31 excitations of first feed port;
: the reflection coefficient during 32 excitations of second feed port;
: the isolation between first feed port 31 and second feed port 32;
: the antenna gain during 31 excitations of first feed port;
: the antenna gain during 32 excitations of second feed port): the stickogram when Fig. 8 (a) is 31 excitations of first feed port; Stickogram when Fig. 8 (b) is 32 excitations of second feed port; Fig. 8 (c) is the isolation figure between first feed port 31 and second feed port 32; Antenna gain pattern when Fig. 8 (d) is first feed port 31 and 32 excitations of second feed port.
Fig. 9 be having of Fig. 5-Fig. 6 institute embodiment two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic when first feed port 31 encourages, the gain pattern when being operated in 2.44GHz and axial ratio beam pattern: (
Phi=0 ° of plane left-hand circular polarization gain pattern;
Phi=0 ° of plane right-handed circular polarization gain pattern;
Phi=90 ° of plane axis left-hand circular polarization gain pattern;
Phi=90 ° of plane right-handed circular polarization gain pattern;
Phi=0 ° of plane axis compares beam pattern;
Phi=90 ° of plane axis is than beam pattern): Fig. 9 (a) is the Phi=0 ° of left and right rounding polarization in plane gain pattern; Fig. 9 (b) is the Phi=90 ° of left and right rounding polarization in plane gain pattern; Fig. 9 (c) compares beam pattern for Phi=0 ° of plane axis; Fig. 9 (d) compares beam pattern for Phi=90 ° of plane axis.
Figure 10 be having of Fig. 5-Fig. 6 institute embodiment two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic when second feed port 32 encourages, the gain pattern when being operated in 2.44GHz and axial ratio beam pattern: (
Phi=0 ° of plane left-hand circular polarization gain pattern;
Phi=0 ° of plane right-handed circular polarization gain pattern;
Phi=90 ° of plane axis left-hand circular polarization gain pattern;
Phi=90 ° of plane right-handed circular polarization gain pattern;
Phi=0 ° of plane axis compares beam pattern;
Phi=90 ° of plane axis is than beam pattern): Figure 10 (a) is the Phi=0 ° of left and right rounding polarization in plane gain pattern; Figure 10 (b) is the Phi=90 ° of left and right rounding polarization in plane gain pattern; Figure 10 (c) compares beam pattern for Phi=0 ° of plane axis; Figure 10 (d) compares beam pattern for Phi=90 ° of plane axis.
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 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, comprise metal waveguide 1, dieelctric sheet 2, upper arm sheet metal 51, underarm sheet metal 52 and 180 ° of annular coupler networks.
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.
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 51 and underarm sheet metal 52.
180 ° of annular coupler networks are on the wherein one side of dielectric-slab 2, comprise: annular microstrip line 47, be connected to first microstrip line 41, the 4th microstrip line 44, second microstrip line 42 and the 3rd microstrip line 43 in annular microstrip line 47 outsides in turn, these four microstrip lines all have 50 ohmages.First feed port 31 is arranged on first microstrip line 41, and second feed port 32 is arranged on second microstrip line 42.Simultaneously, be connected by the 5th microstrip line 45 between the central point of upper arm sheet metal 51 and dieelctric sheet 2 intersection edges and the 3rd microstrip line 43, be connected by the 6th microstrip line 46 between the central point of underarm sheet metal 52 and dieelctric sheet 2 intersection edges and the 4th microstrip line 44.Wherein annular microstrip line 47 length are 1.5 guide wavelengths, annular microstrip line 47 length between annular microstrip line 47 length, second microstrip line 42 and the 3rd microstrip line 43 between annular microstrip line 47 length, first microstrip line 41 and the 3rd microstrip line 43 between first microstrip line 41 and the 4th microstrip line 44, be 1/4th guide wavelengths and all have 50 ohmages, can obtain the good isolation degree between feed port 31 and the feed port 32 like this.When the independent feed of one of them port, the energy that is coupled to the another one port is very little, has reduced influencing each other.The 5th microstrip line 45 and the 6th microstrip line 46 are quarter-wave impedance conversion microstrip line, can mate antenna feed impedance, to reduce the port reflection, obtain good impedance matching bandwidth.
Upper arm sheet metal 51 and underarm sheet metal 52 are for being installed in two rectangular metal sheet with same widths and length on the waveguide sidewalls dieelctric sheet, the angle of sheet metal and 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.On the same day alignment during radiation, underarm sheet metal 52 90 ° of hysteresis upper arm rectangular metal sheet on phase place, under the same day alignment during radiation, upper arm sheet metal 51 90 ° of hysteresis underarm rectangular metal sheet on phase place, thus realize the identical circularly polarised wave radiation of rotation direction in two opposite directions.
This structure specifies as follows:
Realize at first as requested the frequency range of work such as 2.4-GHz WLAN (wireless local area network) frequency range (2.40-2.48GHz, 80MHz), 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 rectangular metal sheet 51 of inserting metal waveguide 1 inside and metal waveguide 1 is realized the radiation of two-way equal energy; The 3rd, insert another one rectangular metal sheet 52 and realize two-way circularly polarised wave radiation with gains such as revolving.The 4th, the width of two rectangular metal sheet of design and spacing are to optimize the circular polarization degree of required frequency range; By introducing 180 ° of annular coupler feed microstrip line structure 41-44 two rectangular metal sheet 51 and 52 are carried out constant amplitude homophase and the anti-phase excitation of constant amplitude at last, and introduce 1/4th impedance transformation line 45 and 46 pairs of antennas in the rectangular metal sheet connectivity port and carry out impedance matching.
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 77mm of metal waveguide 1, highly be 142mm, the length of upper arm sheet metal 51 and underarm sheet metal 52 is 40mm, width is 16mm, vertical interval 48mm, the external diameter of annular microstrip line 47 is 21.5mm, internal diameter is 20mm, the width of first microstrip line 41, the 4th microstrip line 44, second microstrip line 42 and the 3rd microstrip line 43 is 3mm, and the length of the 5th microstrip line 45 and the 6th microstrip line 46 is 20.1mm, and width is 2.4mm.
With having of Fig. 5-size design shown in Figure 6 two-way with revolve, the axial ratio bandwidth of the metal waveguide antenna of double-circle polarization wave radiation characteristic as shown in Figure 7, when this antenna carries out feed in feed port 31, the bandwidth of its two-way axial ratio≤3dB is at 2.33-2.53GHz(200MHz), when this antenna carried out feed in feed port 32, the bandwidth of its two-way axial ratio≤3dB was at 2.34-2.56GHz(220MHz).
With having of Fig. 5-size design shown in Figure 6 two-way with revolve, the port reflection coefficient of the metal waveguide antenna of double-circle polarization wave radiation characteristic, isolation and gain are as shown in Figure 8, when this antenna carries out feed in feed port 31, reflection coefficient≤-impedance bandwidth of 10dB is 1.95-2.58GHz(630MHz), when feed port 32 is carried out feed, reflection coefficient≤-impedance bandwidth of 10dB is 2.32-2.56GHz(240MHz).During for port 31 feeds, its-common bandwidth of 10dB reflection coefficient and 3dB axial ratio is 2.33-2.53GHz(200MHz), during for port 32 feeds, its-common bandwidth of 10dB reflection coefficient and 3dB axial ratio is 2.34-2.56GHz(220MHz), can cover 2.4-GHz WLAN (wireless local area network) working frequency range, the isolation of two ports in the common bandwidth is better than-30dB, realizes that gain is 3.9dBic at 2.44GHz, and gain fluctuation is 1.0dB in the common bandwidth.
With having of Fig. 5-size design shown in Figure 6 two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic when feed port 31 encourages, left and right when being operated in 2.44GHz revolved gain pattern and axial ratio wave beam as shown in Figure 9.At Z-X(Phi=0 °) and Z-Y(Phi=90 °) on two planes, this antenna main pole turns to left-hand circular polarization, and has equal gain at 0 ° on Z axle and 180 ° of both directions.Its axial ratio wave beam is all realized good circular polarization degree at Z axle 0 degree and two opposite directions of 180 degree, and its 3dB axial ratio beamwidth is 60 degree.Main lobe 3dB beamwidth is approximately 60 °, and the 3dB powerbeam can complete covering 3dB axial ratio wave beam.
With having of Fig. 5-size design shown in Figure 6 two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic when feed port 32 encourages, left and right when being operated in 2.44GHz revolved gain pattern and axial ratio wave beam as shown in figure 10.At Z-X(Phi=0 °) and Z-Y(Phi=90 °) on two planes, this antenna main pole turns to right-handed circular polarization, and has equal gain at 0 ° on Z axle and 180 ° of both directions.Its axial ratio wave beam is all realized good axial ratio at Z axle 0 degree and two opposite directions of 180 degree, and its 3dB axial ratio beamwidth is 60 degree.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 because of its have two-way with revolve, the advantage of double-circle polarization wave radiation can be applied in the various wireless communication system, 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 (8)
- One kind have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, 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 (51) and the underarm sheet metal (52) of the as broad as long rectangle on the dieelctric sheet (2), upper arm sheet metal (51) and underarm sheet metal (52) 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 (51) is vertical on the actinal surface cross section of metal waveguide (1) with underarm sheet metal (52);Connect upper arm sheet metal (51) and underarm sheet metal (52), two sheet metals are carried out 180 ° of annular coupler networks of feed;And,Be connected to first feed port (31) and second feed port (32) on described 180 ° of annular coupler networks.
- According to claim 1 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, 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 (51) and underarm sheet metal (52) vertical interval.
- According to claim 1 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that, described upper arm sheet metal (51) and underarm sheet metal (52) 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 revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that described 180 ° of annular coupler networks comprise:Length is the annular microstrip line (47) of 1.5 guide wavelengths;Be connected to first microstrip line (41), the 4th microstrip line (44), second microstrip line (42) and the 3rd microstrip line (43) in annular microstrip line (47) outside in turn, wherein annular microstrip line (47) length between annular microstrip line (47) length, second microstrip line (42) and the 3rd microstrip line (43) between annular microstrip line (47) length, first microstrip line (41) and the 3rd microstrip line (43) between first microstrip line (41) and the 4th microstrip line (44) is 1/4th guide wavelengths.
- According to claim 4 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that described first microstrip line (41), the 4th microstrip line (44), second microstrip line (42) and the 3rd microstrip line (43) all have 50 ohmages.
- According to claim 4 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that described 180 ° of annular coupler networks also comprise:Connect upper arm sheet metal (51) and the central point of dieelctric sheet (2) intersection edges and the 5th microstrip line (45) of the 3rd microstrip line (43); AndConnect underarm sheet metal (52) and the central point of dieelctric sheet (2) intersection edges and the 6th microstrip line (46) of the 4th microstrip line (44);Wherein, the 5th microstrip line (45) is quarter-wave impedance conversion microstrip line with the 6th microstrip line (46).
- According to claim 4 have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that, described first feed port (31) is arranged on first microstrip line (41), and described second feed port (32) is arranged on second microstrip line (42).
- According to claim 1 or 4 or 7 described have two-way with revolve, the metal waveguide antenna of double-circle polarization wave radiation characteristic, it is characterized in that, described first feed port (31) and second feed port (32) are connected the inner wire of 50 ohm of coaxial feed probe respectively, and the outer conductor of coaxial probe is connected on the dieelctric sheet (2).
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| WO2018133066A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市大疆创新科技有限公司 | Two-dimensional antenna system, and method and device for positioning target |
| CN109473778A (en) * | 2018-10-23 | 2019-03-15 | 航天恒星科技有限公司 | A kind of Wideband circular polarized antenna |
| CN110048737A (en) * | 2019-04-17 | 2019-07-23 | 南京理工大学 | A kind of active annular receive-transmit system of radar radio-frequency front-end |
| CN112701438A (en) * | 2020-12-22 | 2021-04-23 | 华南理工大学 | Polarization reconfigurable bidirectional co-rotation direction circularly polarized antenna based on dielectric polarizer |
| 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 |
| WO2021203627A1 (en) * | 2020-04-10 | 2021-10-14 | 南京达斯琪数字科技有限公司 | Rotating display apparatus based on dual circularly polarized bidirectional data transmission modules |
| CN115275584A (en) * | 2022-09-26 | 2022-11-01 | 华南理工大学 | Broadband bidirectional radiation same-rotation-direction circularly polarized helical antenna based on 3D printing technology |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018133066A1 (en) * | 2017-01-22 | 2018-07-26 | 深圳市大疆创新科技有限公司 | Two-dimensional antenna system, and method and device for positioning target |
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| CN109473778A (en) * | 2018-10-23 | 2019-03-15 | 航天恒星科技有限公司 | A kind of Wideband circular polarized antenna |
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| WO2021203627A1 (en) * | 2020-04-10 | 2021-10-14 | 南京达斯琪数字科技有限公司 | Rotating display apparatus based on dual circularly polarized bidirectional data transmission modules |
| CN112701438A (en) * | 2020-12-22 | 2021-04-23 | 华南理工大学 | Polarization reconfigurable bidirectional co-rotation direction circularly polarized antenna based on dielectric polarizer |
| 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 |
| CN115275584A (en) * | 2022-09-26 | 2022-11-01 | 华南理工大学 | Broadband bidirectional radiation same-rotation-direction circularly polarized helical antenna based on 3D printing technology |
| CN115275584B (en) * | 2022-09-26 | 2023-03-24 | 华南理工大学 | Broadband bidirectional radiation same-rotation-direction circularly polarized helical antenna based on 3D printing technology |
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Application publication date: 20130814 |