CN111710986A - Broadband reconfigurable transmission array antenna based on polarization rotating surface - Google Patents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/0006—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices
- H01Q15/0013—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
- H01Q15/002—Devices acting selectively as reflecting surface, as diffracting or as refracting device, e.g. frequency filtering or angular spatial filtering devices said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective said selective devices being reconfigurable or tunable, e.g. using switches or diodes
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
- H01Q15/24—Polarising devices; Polarisation filters
- H01Q15/242—Polarisation converters
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- H01Q21/00—Antenna arrays or systems
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- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
- H01Q21/245—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction provided with means for varying the polarisation
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Abstract
The invention provides a broadband reconfigurable transmission array antenna based on a polarization rotating surface, which is used for solving the problem of narrow bandwidth in the prior art. The reconfigurable transmission array antenna unit phase-shifting structure comprises an array surface consisting of M multiplied by N reconfigurable transmission array antenna units which are periodically arranged, a feed source and a main control circuit board, wherein the phase-shifting structure of the reconfigurable transmission array antenna units comprises two T-shaped microstrip structures and PIN diodes loaded between the bottom ends of longitudinal branches of the two T-shaped microstrip structures. The forward and reverse directions of polarization of the emergent waves are changed by controlling the on and off states of the PIN diode, the 180-degree phase difference of the broadband is physically formed by the emergent waves in the two states, the defect that the frequency change is obvious by using a receiving retransmission structure in the prior art is overcome, and the working bandwidth of the reconfigurable transmission array antenna is effectively widened.
Description
Technical Field
The invention belongs to the technical field of antennas, relates to a transmission array antenna, in particular to a reconfigurable broadband transmission array antenna with a scannable wave beam, and can be used in the technical fields of wireless communication such as astronomical detection and satellite communication.
Background
The transmission array antenna consists of a feed source antenna and a planar array, and each unit of the planar array has the capability of adjusting the phase to compensate the phase delay caused by different spatial paths of each unit irradiated on the array surface by the feed source, so that the required high-gain radiation characteristic is formed. The reconfigurable transmission array antenna loads PIN diodes on traditional transmission array antenna units, discretizes the transmission phase of the array units, and then digitally encodes the on and off states of the PIN diodes on the array surfaces by using the main control circuit board, so that the transmission phase of each array surface unit is changed, and the pointing direction of a wave beam is finally controlled. The wave beam scanning function presented by the reconfigurable transmission array antenna has great application value in the fields of astronomical detection, satellite communication and the like, and is an important direction for research of microwave and antenna researchers.
The reconfigurable transmission array antenna is a planar antenna and combines partial advantages of a parabolic antenna and a phased array antenna. Compared with high-gain antennas such as traditional parabolic antennas, dielectric lenses, phased array antennas and the like, the reconfigurable transmission array antenna avoids the inherent manufacturing complexity of the parabolic antennas and the dielectric lens antennas, and has the advantages of small volume, low cost, light weight and the like. The spatial feed method eliminates the loss of the phased array antenna feed network and implements the beam scanning function by integrating the on-cell PIN diodes without using expensive phase shifter networks, thus being considered as an ideal low-cost alternative for the phased array antenna. In addition, compared with the reconfigurable reflection array antenna, the feed source and the emergent beam of the reconfigurable transmission array antenna are distributed on two sides of the array surface, and the feed source does not shield the emergent beam, so that the reconfigurable transmission array antenna has obvious advantages.
Although reconfigurable transmission array antennas have many advantages, for these antennas, the low aperture efficiency is a common problem, and the main reason is that the antenna gain is reduced and the aperture efficiency is finally low due to the discretization of the transmission phase of the elements and the inaccuracy of the compensation phase. In addition, for the existing reconfigurable transmission array antenna, the PIN diode on each unit needs to be controlled by a separate direct current signal line, the direct current signal and the radio frequency signal can interfere with each other, and the dense direct current signal lines on the array surface can shield the transmission of electromagnetic waves, so that the aperture efficiency of the reconfigurable transmission array antenna is further reduced.
Another important index of the work performance of the reconfigurable transmission array antenna is the bandwidth, and the broadband reconfigurable transmission antenna is favored by researchers due to large system capacity and high transmission rate. Aiming at the design of a broadband reconfigurable transmission array antenna, most of the existing technologies adopt a receiving retransmission structure to expand the bandwidth. However, the receiving and retransmitting structure is obvious to frequency variation, and although the bandwidth is expanded to a certain extent, the requirement of wireless communication is still not met.
For example, M.Wang, S.xu, F.Yang, and M.Li in IEEE Transactions on Antennas and Propagation, vol.67, No.5, pp.3500-3504,2019, journal of the article "Design and measurement of a 1-bit Reconfigurable transmit With microwave antenna H-Shaped coupled Slot Elements" proposes a Reconfigurable transmission array antenna operating in the Ku band. The reconfigurable transmission array antenna unit takes two orthogonal H-shaped gaps as a receiving and transmitting structure and realizes power transmission through a middle coupling microstrip line. The on-off state of the two PIN diodes integrated on the coupling microstrip line is controlled, so that the flow direction of current is controlled, and finally, 180-degree transmission phase difference is generated. Experiments on an array of 16 × 16 units verify that two-dimensional ± 50 ° beam scanning can be realized, the maximum gain is 17.0dBi, and the 3dB gain bandwidth is 9.6%.
In summary, although the existing reconfigurable transmission array antenna uses different technologies to expand the bandwidth, the relative bandwidth is still narrow, and the application range is greatly limited.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, provides a broadband reconfigurable transmission array antenna based on a polarization rotating surface, and effectively widens the bandwidth of the reconfigurable transmission array antenna on the premise of ensuring higher aperture efficiency.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a broadband reconfigurable transmission array antenna based on a polarization rotating surface comprises a array surface consisting of M multiplied by N reconfigurable transmission array antenna units 1 which are periodically arranged, a feed source 2 and a main control circuit board 3, wherein the feed source 2 is positioned on an equivalent focus of the array surface, and M is more than or equal to N and more than or equal to 5; the reconfigurable transmission array antenna unit 1 comprises a first square dielectric plate 11 and a second square dielectric plate 12 which are vertically arranged and are not in contact with each other, polarization grids 13 consisting of K micro-strip straight lines which are arranged at equal intervals are respectively printed on the upper surface of the first dielectric plate 11 and the lower surface of the second dielectric plate 12, K is more than M, and the polarization grids 13 printed on the two dielectric plates are orthogonal to each other; the lower surface of the first dielectric plate 11 and the upper surface of the second dielectric plate 12 are respectively printed with a polarization rotating surface 14;
the polarization rotating surface 14 comprises a T-shaped microstrip structure which has the bottom ends of two longitudinal branches opposite to each other, has a 180-degree difference in direction and is centrosymmetric with respect to the center normal of the dielectric slab, the transverse branch of the T-shaped microstrip structure is arc-shaped with the circle center pointing to the center of the dielectric slab, and a PIN diode 15 is loaded between the bottom ends of the longitudinal branches of the two T-shaped microstrip structures and is used for realizing the 180-degree transmission phase difference generated by the polarization rotating surface 14 by adjusting the on-off state of the PIN diode 15;
the first dielectric slab 11 and the second dielectric slab 12 are respectively provided with two metalized through holes 16, the upper ends of the two metalized through holes 16 arranged on the first dielectric slab 11 are connected with the polarization grid 13 on the first dielectric slab 11, and the lower ends are respectively connected with two PINs of the PIN diode 15 on the first dielectric slab 11 through an impedance microstrip line 17; the lower ends of two metallized through holes 16 arranged on the second dielectric plate 12 are connected with the polarization grid 13 on the second dielectric plate 12, and the upper ends are respectively connected with two PINs of the PIN diode 15 on the second dielectric plate 12 through an impedance microstrip line 17;
k microstrip straight lines in the polarization grids 13 printed on the upper surface of the first dielectric plate 11 and K microstrip straight lines in the polarization grids 13 printed on the lower surface of the second dielectric plate 12 are respectively connected with the main control circuit board 3;
the vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate 11 forms an included angle of 45 degrees with the polarization grid 13 printed on the upper surface of the first dielectric plate 11, the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate 12 forms an included angle of 45 degrees with the polarization grid 13 printed on the lower surface of the second dielectric plate 12, and the vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate 11 and the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate 12 are orthogonal to each other.
In the broadband reconfigurable transmission array antenna based on the polarization rotating surface, the polarization rotating surface 14 includes two circular arc-shaped transverse branches of the T-shaped microstrip structure, which may form a virtual circular ring.
In the broadband reconfigurable transmission array antenna based on the polarization rotating surface, the width of the longitudinal branch of the T-shaped microstrip structure is greater than that of the transverse branch.
In the broadband reconfigurable transmission array antenna based on the polarization rotating surface, the impedance microstrip line 17 adopts a bent microstrip line structure.
In the broadband reconfigurable transmission array antenna based on the polarization rotating surface, the distance between the outer edge of the outermost microstrip line and the edge of the dielectric plate in the K microstrip lines of the polarization grid 13 which are arranged at equal intervals is half of the distance between the adjacent microstrip lines.
Compared with the prior art, the invention has the following advantages:
1. the phase shift structure of the reconfigurable transmission array antenna unit comprises two T-shaped microstrip structures and a PIN diode loaded between the bottom ends of longitudinal branches of the two T-shaped microstrip structures, the positive and negative directions of polarization of emergent waves are changed by controlling the on-state and the off-state of the PIN diode, and the emergent waves in the two states physically form a broadband 180-degree phase difference, so that the defect that the frequency change is obvious by using a receiving retransmission structure in the prior art is overcome, and the working bandwidth of the reconfigurable transmission array antenna is effectively widened.
2. The invention uses the microstrip straight line in the polarization grid to be respectively connected with the main control circuit board, thereby avoiding the defect that the direct current signal line shields the transmission of electromagnetic waves in the prior art and effectively improving the aperture efficiency of the reconfigurable transmission array antenna.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a top view of a second dielectric slab of the present invention;
fig. 3 is a schematic structural diagram of a reconfigurable transmission array antenna unit according to the present invention;
FIG. 4 is a simulation diagram of the result of S12 according to an embodiment of the present invention;
FIG. 5 is a simulation diagram of beam scanning results according to an embodiment of the present invention;
fig. 6 is a simulation diagram of the gain result according to the embodiment of the present invention.
Detailed Description
The invention will be described in further detail with reference to the following figures and specific examples:
referring to fig. 1, the reconfigurable transmission array antenna comprises a array plane composed of M × N reconfigurable transmission array antenna units 1 arranged periodically, a feed source 2 and a main control circuit board 3, wherein the feed source 2 adopts a phase center of a standard gain horn antenna to be positioned on a central normal of the array plane, and in the embodiment, the focal ratio of an equivalent phase center of the horn antenna to the side length of the array plane is 1.24. This embodiment M-16 and N-16.
The main control circuit board 3 is connected with the polarization grids 13 on the upper surface of the first dielectric plate 11 and the lower surface of the second dielectric plate 12, and mainly functions to encode the on and off states of all PIN diodes, so that the antenna beam scanning function is realized, the main control circuit board 3 needs to independently control 256 PIN diodes on a wavefront, in order to reduce the complexity of a system and wiring, the main control chip in the embodiment adopts a single chip microcomputer of STC89C52 model, and the digital logic chip is used for independently controlling 256 signals in a serial-parallel mode. Meanwhile, in order to visually display the state of each path of signal, the main control circuit board 3 is additionally provided with an LED indicating lamp for each path of signal.
As shown in fig. 2, the second dielectric plate 12 has a side length P of 17.1mm, a dielectric constant of 3.5, and a thickness t of F4B material14 mm. The upper surface of the second dielectric plate 12 is printed with a polarization rotating surface 14, the polarization rotating surface 14 comprises two T-shaped microstrip structures with opposite bottom ends of longitudinal branches, 180-degree difference in direction and symmetrical with respect to the center normal of the dielectric plate, the transverse branch of the T-shaped microstrip structure is an arc with the center pointing to the center of the dielectric plate, and the arc transverse branches of the two T-shaped microstrip structures are arc-shaped with inner radii r cut by two straight lines intersecting at the center of the dielectric plate17.8mm, outer radius r2Obtained as a 8.3mm circle. The T-shaped microstrip structure has a rectangular structure with the longitudinal branch width of 1.5 (a) and the length of 16.3mm (b), and a PIN diode 15 is loaded between the bottom ends of the longitudinal branches of the two T-shaped microstrip structures. The lower surfaces of the second dielectric plates 12 are respectively printed with 18 line widths w10.45mm, adjacent spacing w2The length of the polarization grid 13 formed by 0.45mm microstrip lines is the same as the side length of the dielectric plate, the distance between the edge of the microstrip line at the outermost side and the edge of the dielectric plate is half of the distance between the adjacent microstrip lines or the distance between the edge of the first microstrip line and the edge of the dielectric plate is overlapped, and the distance between the edge of the last microstrip line and the edge of the dielectric plate is the distance between the adjacent microstrip lines. In this embodiment, the distance between the edge of the outermost microstrip straight line and the edge of the dielectric plate is half of the distance between adjacent microstrip straight lines. Two metalized via holes 16 are respectively arranged on the second dielectric plate 12, the lower ends of the two metalized via holes 16 arranged on the second dielectric plate 12 are connected with the polarization grid 13 on the second dielectric plate 12, and the upper ends are respectively connected with the PIN diode 15 on the second dielectric plate 12 through an impedance microstrip line 17In order to independently control all PIN diodes on 16 × 16 reconfigurable transmission array antennas, each PIN diode 15 corresponds to different microstrip straight lines in different polarization grids 13 and forms a unique loop with a main control circuit board 3. the PIN diode 15 in the embodiment is in a SMP1340-079 model, the impedance microstrip line 17 is a metal line with the width of 0.1mm, the length of a thin line is increased in a limited area by using a bending method so as to block a radio frequency signal from entering a direct current signal line, and the diameter of the metallized through hole 16 is 0.3 mm.
Referring to fig. 3, the reconfigurable transmission array antenna unit 1 includes a first square dielectric plate 11 and a second square dielectric plate 12 which are arranged up and down and are not in contact with each other, the first dielectric plate 11 is obtained by rotating the second dielectric plate 12 clockwise by 90 degrees around a normal line of a center of the dielectric plate 12 and then rotating by 180 degrees along a center line of the dielectric plate 12, the first dielectric plate 11 and the second dielectric plate 12 are not in contact with each other, in a wavefront formed by the 16 × 16 reconfigurable transmission array antenna units 1 which are periodically arranged, metal strips are used around the first dielectric plate and the second dielectric plate of the wavefront to separate the first dielectric plate and the second dielectric plate, and the thickness t of the metal strips21.5mm, the main function is to solder the PIN diode 15 between the lower surface of the first dielectric plate 11 and the upper surface of the second dielectric plate 12.
The vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate 11 forms a 45-degree included angle with the polarization grid 13 printed on the upper surface of the first dielectric plate 11, the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate 12 forms a 45-degree included angle with the polarization grid 13 printed on the lower surface of the second dielectric plate 12, and the vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate 11 and the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate 12 are orthogonal to each other, so that the cross polarization component can be effectively reduced.
The working principle of the present invention is that when the PIN diode 15 on the lower surface of the first dielectric plate 11 is turned on alone, the unit can convert the incident wave in the y direction emitted from the horn antenna 2 into the outgoing wave orthogonal to the x direction. Further analysis shows that the incident wave electric field is decomposed into two orthogonal components parallel to the longitudinal branches of the T-shaped microstrip structure on the lower surface of the first dielectric slab 11 and perpendicular to the longitudinal branches of the T-shaped microstrip structure, and the component direction parallel to the longitudinal branches of the T-shaped microstrip structure is unchanged and the component direction perpendicular to the longitudinal branches of the T-shaped microstrip structure is rotated by 180 ° under the action of the polarization rotation surface 14. Thus, after the two components are recombined, the polarization of the outgoing wave is rotated by 90 °. Similarly, the case when the PIN diode 15 on the upper surface of the second dielectric plate 12 is turned on alone is similar to the case when the PIN diode 15 on the upper surface of the first dielectric plate 11 is turned on alone. Since the polarization rotation surface 14 of the lower surface of the first dielectric plate 11 is orthogonal to the polarization rotation surface 14 of the upper surface of the second dielectric plate 12 in spatial position, the two states when the two PIN diodes are respectively turned on have opposite polarization directions of outgoing waves and have a physical difference of 180 ° in transmission phase. The main control circuit board 3 is used for carrying out phase coding on the 16 multiplied by 16 units, and finally the beam scanning function is realized. The polarization grid 13 is used for improving the polarization conversion efficiency of the reconfigurable transmission array unit 1 and reducing cross polarization components, and meanwhile, the polarization grid 13 is used for conducting direct current signals for the first time to independently regulate and control each PIN diode 15, so that the defect that dense direct current signal lines shield electromagnetic wave transmission in the prior art is overcome, and the aperture efficiency of the reconfigurable transmission array antenna is effectively improved.
The technical effects of the invention are further explained by simulation experiments as follows:
1. simulation conditions and contents:
the simulation utilized commercial software HFSS — 18.0 used in the existing literature, the PIN diode using capacitance, resistance and inductance to build an equivalent model, where on, a resistance equivalent to 0.78 Ω is connected in series with an inductance of 0.7nH, and off, an inductance equivalent to 0.7nH is connected in series with a capacitance of 210 fF;
2. and (3) simulation result analysis:
referring to fig. 4, state 1 is to turn on only the PIN diode 15 on the lower surface of the first dielectric plate 11, and state 2 is to turn on only the PIN diode 15 on the upper surface of the second dielectric plate 12. In the frequency band of 4-6.5GHz, due to the symmetry of the unit structure, the simulated transmission amplitudes in the two states are almost equal, and the transmission amplitude of the reconfigurable transmission array antenna unit 1 in the two states is larger than 0.7. Because the polarization directions are opposite, the simulated phase difference of the two states is stabilized at 180 degrees, and the simulation phase difference is kept consistent with the previous theoretical analysis.
Referring to fig. 5, at 5GHz, 16 × 16 reconfigurable transmission array antenna units 3 implement two-dimensional ± 40 ° beam scanning, and referring to fig. 6, at 5GHz, the 3dB gain bandwidth of 16 × 16 reconfigurable transmission array antenna units 1 is 46%, and the aperture efficiency is 20%, which is obviously superior to the 3dB gain bandwidth of 9.6% and the aperture efficiency of 14% in the reference.
While the foregoing is directed to embodiments of the present invention and not to any limitations thereof, it will be apparent to those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.
Claims (5)
1. A broadband reconfigurable transmission array antenna based on a polarization rotating surface comprises a array surface, a feed source (2) and a main control circuit board (3), wherein the array surface is composed of M multiplied by N reconfigurable transmission array antenna units (1) which are periodically arranged, the feed source (2) is positioned on an equivalent focus of the array surface, and M is more than or equal to N and more than or equal to 5; the reconfigurable transmission array antenna unit (1) comprises a first square dielectric plate (11) and a second square dielectric plate (12) which are vertically arranged and are not in contact with each other, polarization grids (13) formed by K micro-strip straight lines which are arranged at equal intervals are respectively printed on the upper surface of the first dielectric plate (11) and the lower surface of the second dielectric plate (12), K is more than M, and the polarization grids (13) printed on the two dielectric plates are orthogonal to each other; the lower surface of the first dielectric plate (11) and the upper surface of the second dielectric plate (12) are respectively printed with a polarization rotating surface (14);
the method is characterized in that:
the polarization rotating surface (14) comprises a T-shaped micro-strip structure which has the bottom ends of two longitudinal branches opposite to each other, has a direction difference of 180 degrees and is centrosymmetric about the center normal of the dielectric plate, and the transverse branch of the T-shaped micro-strip structure is in an arc shape with the center pointing to the center of the dielectric plate; a PIN diode (15) is loaded between the bottom ends of two longitudinal branches of the T-shaped microstrip structure of the polarization rotating surface (14) to form a phase shifting structure of the reconfigurable transmission array antenna unit (1), and 180-degree transmission phase difference is generated on the polarization rotating surface (14) by adjusting the on-off state of the PIN diode (15);
the first dielectric plate (11) and the second dielectric plate (12) are respectively provided with two metalized through holes (16), the upper ends of the two metalized through holes (16) arranged on the first dielectric plate (11) are connected with the polarization grid (13) on the first dielectric plate (11), and the lower ends of the two metalized through holes are respectively connected with two PINs of the PIN diode (15) on the first dielectric plate (11) through an impedance microstrip line (17); the lower ends of two metallized through holes (16) arranged on the second dielectric plate (12) are connected with a polarization grid (13) on the second dielectric plate (12), and the upper ends are respectively connected with two PINs of a PIN diode (15) on the second dielectric plate (12) through impedance microstrip lines (17);
k microstrip straight lines in the polarization grid (13) printed on the upper surface of the first dielectric plate (11) and K microstrip straight lines in the polarization grid (13) printed on the lower surface of the second dielectric plate (12) are respectively connected with the main control circuit board (3);
the vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate (11) forms a 45-degree included angle with the polarization grid (13) printed on the upper surface of the first dielectric plate (11), the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate (12) forms a 45-degree included angle with the polarization grid (13) printed on the lower surface of the second dielectric plate (12), and the vertical branch of the T-shaped microstrip structure printed on the lower surface of the first dielectric plate (11) and the vertical branch of the T-shaped microstrip structure printed on the upper surface of the second dielectric plate (12) are mutually orthogonal.
2. The broadband reconfigurable transmission array antenna based on the polarization rotating surface according to claim 1, wherein: the polarization rotating surface (14) comprises two arc-shaped transverse branches of a T-shaped microstrip structure, and the two arc-shaped transverse branches can form a virtual circular ring.
3. The broadband reconfigurable transmission array antenna based on the polarization rotating surface according to claim 1, wherein: the width of the longitudinal branch of the T-shaped microstrip structure is larger than that of the transverse branch.
4. The broadband reconfigurable transmission array antenna based on the polarization rotating surface according to claim 1, wherein: the impedance microstrip line (17) adopts a bent microstrip line structure.
5. The broadband reconfigurable transmission array antenna based on the polarization rotating surface according to claim 1, wherein: and in the polarization grid (13), the distance between the outer edge of the outermost microstrip straight line and the edge of the dielectric plate is half of the distance between the adjacent microstrip straight lines in the K microstrip straight lines which are arranged at equal intervals.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113126171A (en) * | 2021-03-25 | 2021-07-16 | 中国地质大学（北京） | Reconfigurable reflection type lens antenna and detection method |
| CN113314853A (en) * | 2021-05-28 | 2021-08-27 | 中国人民解放军国防科技大学 | Self-adaptive plane reflection/scattering array antenna |
| CN117594989A (en) * | 2023-11-22 | 2024-02-23 | 安徽师范大学 | Reflection type broadband and frequency reconfigurable polarization converter |
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| CN113126171A (en) * | 2021-03-25 | 2021-07-16 | 中国地质大学（北京） | Reconfigurable reflection type lens antenna and detection method |
| CN113314853A (en) * | 2021-05-28 | 2021-08-27 | 中国人民解放军国防科技大学 | Self-adaptive plane reflection/scattering array antenna |
| CN117594989A (en) * | 2023-11-22 | 2024-02-23 | 安徽师范大学 | Reflection type broadband and frequency reconfigurable polarization converter |
| CN117594989B (en) * | 2023-11-22 | 2024-07-12 | 安徽师范大学 | Reflection type broadband and frequency reconfigurable polarization converter |
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