CN110518338A - A kind of frequency and the restructural broad-band antenna that polarizes - Google Patents
A kind of frequency and the restructural broad-band antenna that polarizes Download PDFInfo
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- CN110518338A CN110518338A CN201910766890.XA CN201910766890A CN110518338A CN 110518338 A CN110518338 A CN 110518338A CN 201910766890 A CN201910766890 A CN 201910766890A CN 110518338 A CN110518338 A CN 110518338A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
- H01Q1/38—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith formed by a conductive layer on an insulating support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/48—Earthing means; Earth screens; Counterpoises
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/50—Structural association of antennas with earthing switches, lead-in devices or lightning protectors
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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
- H01Q15/14—Reflecting surfaces; Equivalent structures
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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
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Abstract
The invention proposes a kind of frequency and the restructural broad-band antenna of polarizing, the technical issues of for solving subband narrower bandwidth existing in the prior art.The RF switch of reflecting plate, coaxial line and load between rectangular aperture and fed patch and dipole arm thereunder is fixed including medium substrate and by connecting column, by the connection and off-state that control RF switch, the left-hand circular polarization and right-handed circular polarization characteristic of antenna may be implemented, meet preferable polarization characteristic simultaneously, preferable stationary wave characteristic, and three different frequency subbands can be respectively corresponded；Furthermore, printed dipole arm can be distinguished by the upper and lower surface in medium substrate, and it connects to form cross dipole minor structure by 1/4 wavelength phases delay line, and then widen the bandwidth of frequency subband, it realizes the covering to Whole frequency band, can be applied to the fields such as satellite communication, remote sensing telemetering, wireless telecommunications.
Description
Technical field
The invention belongs to antenna technical fields, are related to a kind of frequency and the restructural broad-band antenna that polarizes, can be applied to defend
The fields such as star communication, remote sensing telemetering, wireless telecommunications.
Background technique
Antenna is the important component of wireless communication system.The fast-developing of wireless communication technique proposes system requirements
Higher requirement, traditional single function antenna can not meet current needs well, and become system for restricting performance and send out
The bottleneck of exhibition.The it is proposed and development of reconfigurable antenna provide good solution to these problems.Reconfigurable antenna can be with
Change the characteristics such as operating frequency of antenna, antenna pattern and polarization mode according to the requirement of varying environment, to meet logical
Believe system requirements.The communication system availability of frequency spectrum can be improved in frequency reconfigurable antenna；Directional diagram reconstructable aerial can be saved
Communication system energy improves communication system security；Polarization reconfigurable antenna can increase additional transceiver channel, in polarization point
Collection, frequency division multiplexing etc. have tremendous contribution, in addition, polarization reconfigurable antenna signal fadeout for caused by multipath effect also has
Certain inhibiting effect improves system to the immunocompetence of interference signal.
Domestic and foreign scholars are concentrated mainly on frequency reconfigurable antenna for the research of reconfigurable antenna and the restructural day that polarizes
Line proposes multi-frequency or the independent restructural antenna design of polarization.However, the frequency of antenna and polarization are restructural simultaneously
Spatial degrees of freedom can be improved, to improve the power system capacity of wireless communication system, solve the problems, such as the polarization mismatch in communication,
Electronic interferences between system can also be avoided, the availability of frequency spectrum is improved, improves the transmission rate of communication system.
Such as application publication number is CN108987913A, entitled " a kind of frequency, the restructural paster antenna of polarization " it is special
Benefit application discloses a kind of frequency, the restructural paster antenna of polarization, comprising: the upper surface of dielectric substrate, dielectric substrate is equipped with gold
Belong to patch, it further includes three groups of grounding through hole in dielectric substrate, grounding through hole that the lower surface of dielectric substrate, which is equipped with ground plane,
Metal patch and ground plane are connected, in addition, further including two pairs of controllable perturbation portions on metal patch, three groups of grounding through hole
Switch is separately connected with two pairs of controllable perturbation portions.There are mainly two types of effects for switch: first is that the ground state of control grounding through hole,
To change the working frequency of antenna；Second is that controlling the state of controllable perturbation portion, change the disturbance to electric current, to be formed not
Same polarization.The antenna realizes the restructural of the work of multiple frequency subbands and a variety of polarized states, but it is existing insufficient
Place is not link between the multiple frequency subbands reconstructed, and frequency subband cannot completely cover Whole frequency band, in addition, each frequency
The bandwidth of rate subband all relative narrowers, only 5% or so.Therefore, it will receive certain limitation in practical applications.
Summary of the invention
It is an object of the invention to overcome the problems of the above-mentioned prior art, proposes a kind of frequency and polarization is restructural
Broad-band antenna, the technical issues of for solving subband narrower bandwidth existing in the prior art.
To achieve the goals above, the technical solution adopted by the present invention includes medium substrate 1, reflecting plate 3 and coaxial line 4,
The medium substrate 1 is fixed on the top of reflecting plate 3 by connecting column 2, and the upper and lower surfaces of the medium substrate 1 print respectively
It is formed with radiating element 5, in which:
The radiating element 5, including two shapes are isosceles trapezoid dipole arm 52, which is in 90 °
Arrangement, and connected by 1/4 wavelength phases delay line 51, on the 1/4 wavelength phases delay line 51 and two dipole arms 52
Bottom, which is formed by space, is provided with fed patch 53, is etched with the rectangular slits parallel with its bottom edge in the dipole arm 52
One or more RF switches are loaded between gap, the rectangular aperture and fed patch 53 and the upper bottom of dipole arm 52
54；
The radiating element 5 for being printed on 1 lower surface of medium substrate, positioned at the radiation for being printed on 1 upper surface of medium substrate
Unit 5 is after 180 ° of the rotation of 53 center of fed patch in the projected position of 1 lower surface of medium substrate；It is described to be located at medium substrate 1
The wavelength phases of dipole arm 52 and 1/4 delay line 51 of upper and lower surface forms cross dipole minor structure, for realizing the width of antenna
Band characteristic；
The coaxial line 4, the inner core of the upper end are connected with the fed patch 53 for being printed on 1 upper surface of medium substrate, crust
It is connected with the fed patch 53 for being printed on 1 lower surface of medium substrate, lower end passes through the through-hole being arranged on reflecting plate 2.
A kind of above-mentioned frequency and the restructural broad-band antenna of polarizing, the radiating element 5, in fed patch 53 therein
The heart is overlapped in the centre normal of medium substrate 1, and with the intersection point of two 52 symmetry axis of dipole arm.
A kind of above-mentioned frequency and the restructural broad-band antenna that polarizes, the RF switch 54, using microelectromechanical systems
Any one in switch, PIN type diode switch and fet switch.
A kind of above-mentioned frequency and polarize restructural broad-band antenna, the rectangular aperture and fed patch 53 and dipole
One or more RF switches 54 are loaded between the upper bottom of arm 52, wherein RF switch 54 of the load on rectangular aperture is used
In by being connected to the control with off-state to it, the frequency reconfigurable characteristic of antenna is realized；Load is in fed patch 53 and occasionally
RF switch 54 between extremely sub- arm 52, for realizing that the polarization of antenna can be weighed by being connected to the control with off-state to it
Structure characteristic.
A kind of above-mentioned frequency and the restructural broad-band antenna of polarizing, the medium substrate 1, use relative dielectric constant for
3.5 square plate.
A kind of above-mentioned frequency and the restructural broad-band antenna that polarizes, the connecting column 2, using insulating materials.
Compared with the prior art, the invention has the following advantages:
The present invention, can be with by RF switch of the control load between rectangular aperture and fed patch and dipole arm
It realizes the left-hand circular polarization and right-handed circular polarization characteristic of antenna, while meeting preferable polarization characteristic, preferable stationary wave characteristic, and
Three different frequency subbands can be respectively corresponded；Furthermore, it is possible to print dipole respectively by the upper and lower surface in medium substrate
Sub- arm, and the bandwidth to form cross dipole minor structure, and then widen frequency subband is connected by 1/4 wavelength phases delay line, it is real
Now to the covering of Whole frequency band.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram of radiating element of the present invention；
Fig. 3 is the structural schematic diagram of present media substrate；
Fig. 4 is that return loss and axis of the work of the embodiment of the present invention in left-hand circular polarization low-frequency range compare simulation result diagram；
Fig. 5 is phi=0 ° and phi of work of the embodiment of the present invention in left-hand circular polarization low-frequency range in the case where frequency is 2GHz
The antenna pattern in=90 ° of faces；
Fig. 6 be the embodiment of the present invention when being worked in normal orientation in left-hand circular polarization low-frequency range gain with frequency variation
Relational graph；
Fig. 7 is that return loss and axis of the work of the embodiment of the present invention in left-hand circular polarization Mid Frequency compare simulation result diagram；
Fig. 8 be the embodiment of the present invention work in left-hand circular polarization Mid Frequency frequency be 2.4GHz under phi=0 ° and
The antenna pattern in phi=90 ° of face；
Fig. 9 be the embodiment of the present invention when being worked in normal orientation in left-hand circular polarization Mid Frequency gain with frequency variation
Relational graph；
Figure 10 is that return loss and axis of the work of the embodiment of the present invention in left-hand circular polarization high band compare simulation result diagram；
Figure 11 be the embodiment of the present invention work in left-hand circular polarization high band frequency be 3GHz under phi=0 ° and
The antenna pattern in phi=90 ° of face；
Figure 12 be the embodiment of the present invention when being worked in normal orientation in left-hand circular polarization high band gain with frequency change
Change relational graph；
Figure 13 is that return loss and axis of the work of the embodiment of the present invention in right-handed circular polarization low-frequency range compare simulation result diagram；
Figure 14 be the embodiment of the present invention work in right-handed circular polarization low-frequency range frequency be 2GHz under phi=0 ° and
The antenna pattern in phi=90 ° of face；
Figure 15 be the embodiment of the present invention when being worked in normal orientation in right-handed circular polarization low-frequency range gain with frequency change
Change relational graph；
Figure 16 is that return loss and axis of the work of the embodiment of the present invention in right-handed circular polarization Mid Frequency compare simulation result diagram；
Figure 17 be the embodiment of the present invention work in right-handed circular polarization Mid Frequency frequency be 2.4GHz under phi=0 ° and
The antenna pattern in phi=90 ° of face；
Figure 18 be the embodiment of the present invention when being worked in normal orientation in right-handed circular polarization Mid Frequency gain with frequency change
Change relational graph；
Figure 19 is that return loss and axis of the work of the embodiment of the present invention in right-handed circular polarization high band compare simulation result diagram；
Figure 20 be the embodiment of the present invention work in right-handed circular polarization high band frequency be 3GHz under phi=0 ° and
The antenna pattern in phi=90 ° of face；
Figure 21 be the embodiment of the present invention when being worked in normal orientation in right-handed circular polarization high band gain with frequency change
Change relational graph；
Specific embodiment
In the following with reference to the drawings and specific embodiments, present invention is further described in detail:
With reference to Fig. 1, the present invention includes medium substrate 1, reflecting plate 3 and coaxial line 4, and the medium substrate 1 passes through connecting column 2
It is fixed on the top of reflecting plate 3；
Medium substrate 1 with a thickness of 1mm, use dielectric constant for 3.5, the rectangular F4BM material that loss angle tangent is 0.004
Material, its side length is w1=70mm；The upper and lower surfaces of medium substrate 1 are printed with radiating element 5, structure such as Fig. 2 respectively
It is shown；
Connecting column 2, using insulating materials, the present embodiment uses radius for 1.5mm, four nylon columns of a height of 50mm, point
It is not distributed in the surrounding of medium substrate 1, and the horizontal and vertical distance at its center to 1 center of medium substrate is 32mm；
Reflecting plate 3 covers the medium substrate or aluminium sheet of copper using lower surface, and the present embodiment uses side length for w2=100mm,
With a thickness of the rectangular aluminium sheet of 3mm, the center of rectangular aluminium sheet is provided with the through-hole that radius is 3mm；
Coaxial line 4, the inner core that the upper end radius is 0.3mm and 53 phase of fed patch for being printed on 1 upper surface of medium substrate
Even, radius is that the crust of 0.7mm is connected with the fed patch 53 for being printed on 1 lower surface of medium substrate, and lower end passes through on reflecting plate 3
The through-hole of setting；
With reference to Fig. 2, radiating element 5, including two shapes are isosceles trapezoid dipole arm 52, and the upper bottom of the isosceles trapezoid is
A=5.7mm goes to the bottom as b=28mm, a height of d2=25mm, and two dipole arms 52 therein pass through width in 90 ° of arrangements
It is connected for the 1/4 wavelength phases delay line 51 of wr=1mm, on the 1/4 wavelength phases delay line 51 and two dipole arms 52
Bottom is formed by the rectangular fed patch 53 for being provided with that side length is f=4.5mm in space, and the center of the fed patch 53 is located at
In the centre normal of medium substrate 1, and it is overlapped with the intersection point of two 52 symmetry axis of dipole arm；It is etched in the dipole arm 52
Have parallel with isosceles trapezoid bottom edge and be d1=15.95mm with bottom distance in isosceles trapezoid, width is the rectangular aperture of n=2mm, institute
Rectangular aperture load is stated there are two a length of n=2mm, width is the RF switch 54 of 1.5mm, and described two RF switches 54 are about idol
The symmetrical axial symmetry of extremely sub- arm 52, and the distance of the center of RF switch 54 to 52 symmetry axis of dipole arm is 7mm, the feed
An a length of 1.5mm is loaded between patch 53 and the upper bottom of dipole arm 52, width is the RF switch 54 and the radio frequency of 0.8mm
The symmetry axis of switch 54 and the symmetrical overlapping of axles of dipole arm 52.
With reference to Fig. 3, the radiating element 5 for being printed on 1 lower surface of medium substrate, positioned at being printed on table on medium substrate 1
The radiating element 5 in face is after 180 ° of the rotation of 53 center of fed patch in the projected position of 1 lower surface of medium substrate；It is described to be located at Jie
The wavelength phases of dipole arm 52 and 1/4 delay line 51 of 1 upper and lower surface of matter substrate forms cross dipole minor structure, for realizing day
The broadband character of line；
The RF switch (54), using micro electromechanical system switch, PIN type diode switch and fet switch
In any one, RF switch 54 is using PIN type diode switch and equivalent with sheet metal ideal here, wherein loads and exists
RF switch 54 on rectangular aperture, for realizing by being connected to the presence or absence of control namely sheet metal with off-state to it
The frequency reconfigurable characteristic of antenna；Load RF switch 54 between fed patch 53 and dipole arm 52, for by pair
It is connected to the presence or absence of control namely sheet metal with off-state, realizes the restructural characteristic of the polarization of antenna；When load is in rectangle
RF switch 54 on gap is all connected to, and loads the radio frequency being located on y-axis direction between fed patch 53 and dipole arm 52
Switch 54 is connected to, and when being located at the disconnection of RF switch 54 in x-axis direction, antenna is in left-hand circular polarization low-frequency range state；Work as load
RF switch 54 on rectangular aperture all disconnects, and load is located on y-axis direction between fed patch 53 and dipole arm 52
RF switch 54 be connected to, be located at x-axis direction on RF switch 54 disconnect when, antenna is in left-hand circular polarization high band state；
When RF switch 54 of the load being located in 1 upper surface x-axis direction of medium substrate on rectangular aperture is connected to, on y-axis direction
RF switch 54 disconnects and RF switch 54 of the load on 1 lower surface y-axis direction of medium substrate on rectangular aperture connects
Logical, the RF switch 54 in x-axis direction disconnects, and load is located on y-axis direction between fed patch 53 and dipole arm 52
RF switch 54 is connected to, and when being located at the disconnection of RF switch 54 in x-axis direction, antenna is in left-hand circular polarization Mid Frequency state；When
The RF switch 54 loaded on rectangular aperture is all connected to, and load is located at x-axis side between fed patch 53 and dipole arm 52
Upward RF switch 54 is connected to, and when being located at the disconnection of RF switch 54 on y-axis direction, antenna is in right-handed circular polarization low-frequency range shape
State；When the RF switch 54 loaded on rectangular aperture all disconnects, load is located at x between fed patch 53 and dipole arm 52
RF switch 54 in axis direction is connected to, and when being located at the disconnection of RF switch 54 on y-axis direction, antenna is in right-handed circular polarization high frequency
Section state；When RF switch 54 connection of the load being located on 1 upper surface y-axis direction of medium substrate on rectangular aperture, x-axis side
Upward RF switch 54 disconnects and radio frequency of the load in 1 lower surface x-axis direction of medium substrate on rectangular aperture is opened
54 connections are closed, the RF switch 54 on y-axis direction disconnects, and load is located at x-axis side between fed patch 53 and dipole arm 52
Upward RF switch 54 is connected to, and when being located at the disconnection of RF switch 54 on y-axis direction, antenna is in right-handed circular polarization Mid Frequency shape
State；
Effect of the invention is described further in combination with simulation result:
1, emulation content
1.1 work in left-hand circular polarization low-frequency range to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Fig. 4 (a) and 4 (b).
1.2 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in left-hand circular polarization low-frequency range
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 2GHz carries out simulation calculation, as a result such as Fig. 5 (a) and 5 (b)
It is shown.
1.3 work in normal orientation in left-handed entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing low-frequency range, as a result as shown in Figure 6.
1.4 work in left-hand circular polarization Mid Frequency to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Fig. 7 (a) and 7 (b).
1.5 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in left-hand circular polarization Mid Frequency
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 2.4GHz carries out simulation calculation, as a result such as Fig. 8 (a) and 8
(b) shown in.
1.6 work in normal orientation in left-handed entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing Mid Frequency, as a result as shown in Figure 9.
1.7 work in left-hand circular polarization high band to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Figure 10 (a) and 10 (b).
1.8 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in left-hand circular polarization high band
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 3GHz carries out simulation calculation, as a result such as Figure 11 (a) and 11
(b) shown in.
1.9 work in normal orientation in left-handed entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing high band, as a result as shown in figure 12.
2.0 work in right-handed circular polarization low-frequency range to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Figure 13 (a) and 13 (b).
2.1 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in right-handed circular polarization low-frequency range
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 2GHz carries out simulation calculation, as a result such as Figure 14 (a) and 14
(b) shown in.
2.2 work in normal orientation in dextrorotation entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing low-frequency range, as a result as shown in figure 15.
2.3 work in right-handed circular polarization Mid Frequency to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Figure 16 (a) and 16 (b).
2.4 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in right-handed circular polarization Mid Frequency
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 2.4GHz carries out simulation calculation, as a result such as Figure 17 (a) and 17
(b) shown in.
2.5 work in normal orientation in dextrorotation entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing Mid Frequency, as a result as shown in figure 18.
2.6 work in right-handed circular polarization high band to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Return loss and axis are than carrying out simulation calculation, as a result as shown in Figure 19 (a) and 19 (b).
2.7 using business simulation software HFSS_15.0 to the embodiment of the present invention 1 work in right-handed circular polarization high band
Frequency is that the antenna pattern in phi=0 ° and phi=90 ° face under 3GHz carries out simulation calculation, as a result such as Figure 20 (a) and 20
(b) shown in.
2.8 work in normal orientation in dextrorotation entelechy to the embodiment of the present invention 1 using business simulation software HFSS_15.0
Gain carries out simulation calculation with the variation relation of frequency when changing high band, as a result as shown in figure 21.
2, simulation result
Referring to Fig. 4, using S11 < -10dB and AR < 3dB as standard, antenna is in the 10-dB return loss bandwidth of low-frequency range
70% (1.35GHz -2.8GHz), 3-dB axial ratio bandwidth are 45% (1.57GHz -2.48GHz), and it is left-handed to show that the antenna realizes
Circular polarisation work, broader bandwidth.
Referring to Fig. 5, the antenna pattern in described phi=0 ° in the case where frequency is 2GHz and phi=90 ° of face can from figure
To find out aerial radiation left-hand circular polarization wave, at Theta=0 °, main polarization gain is 6.28dB, and corresponding dextrorotation entelechy
It is very low to change gain, therefore the design has good circular polarisation purity.
Referring to Fig. 6, the gain when being worked in normal orientation in left-hand circular polarization low-frequency range with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.8dB, and gain declines with the raising of frequency,
Decline most serious in 2.8GHz frequency gain.
Referring to Fig. 7, using S11 < -10dB and AR < 3dB as standard, antenna is in Mid Frequency 10-dB return loss bandwidth
63.7% (1.55GHz -3GHz), 3-dB axial ratio bandwidth are 26.8% (2.03GHz -2.66GHz), show that the antenna realizes a left side
Hand circular polarization work, broader bandwidth.
Referring to Fig. 8, the phi=0 ° of antenna pattern with phi=90 ° of face in the case where frequency is 2.4GHz, Cong Tuzhong
It can be seen that aerial radiation left-hand circular polarization wave, at Theta=0 °, main polarization gain is 5.34dB, and corresponding dextrorotation is round
Polarized gain is very low, therefore the design has good circular polarisation purity.
Referring to Fig. 9, the gain when being worked in normal orientation in left-hand circular polarization Mid Frequency with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.86dB, and gain declines with the raising of frequency,
Gain declines most serious under 3GHz frequency.
Referring to Fig.1 0, using S11 < -10dB and AR < 3dB as standard, antenna is in the 10-dB return loss bandwidth of high band
53.2% (1.86GHz -3.21GHz), 3-dB axial ratio bandwidth are 9.8% (2.9GHz -3.2GHz), show that the antenna realizes a left side
Hand circular polarization work, broader bandwidth.
Referring to Fig.1 1, the antenna pattern in described phi=0 ° in the case where frequency is 3GHz and phi=90 ° of face can from figure
To find out aerial radiation left-hand circular polarization wave, at Theta=0 °, main polarization gain is 4.96dB, and corresponding dextrorotation entelechy
It is very low to change gain, therefore the design has good circular polarisation purity.
Referring to Fig.1 2, the gain when being worked in normal orientation in left-hand circular polarization high band with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.32dB, and gain declines with the raising of frequency,
Gain declines most serious under 3.21GHz frequency.
Referring to Fig.1 3, using S11 < -10dB and AR < 3dB as standard, antenna is in the 10-dB return loss bandwidth of low-frequency range
70.5% (1.34GHz -2.8GHz), 3-dB axial ratio bandwidth are 42% (1.58GHz -2.42GHz), show that the antenna realizes the right side
Hand circular polarization work, broader bandwidth.
Referring to Fig.1 4, the antenna pattern in described phi=0 ° in the case where frequency is 2GHz and phi=90 ° of face can from figure
To find out aerial radiation right-handed circular polarization wave, at Theta=0 °, main polarization gain is 6.35dB, and left-handed entelechy accordingly
It is very low to change gain, therefore the design has good circular polarisation purity.
Referring to Fig.1 5, the gain when being worked in normal orientation in right-handed circular polarization low-frequency range with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.8dB, and gain declines with the raising of frequency,
Decline most serious in 2.8GHz frequency gain.
Referring to Fig.1 6, using S11 < -10dB and AR < 3dB as standard, antenna is in Mid Frequency 10-dB return loss bandwidth
63.4% (1.55GHz -2.99GHz), 3-dB axial ratio bandwidth are 27.6% (2GHz -2.64GHz), show that the antenna realizes the right side
Hand circular polarization work, broader bandwidth.
Referring to Fig.1 7, the antenna pattern in described phi=0 ° in the case where frequency is 2.4GHz and phi=90 ° of face, Cong Tuzhong
It can be seen that aerial radiation right-handed circular polarization wave, at Theta=0 °, main polarization gain is 5.32dB, and left-handed circle accordingly
Polarized gain is very low, therefore the design has good circular polarisation purity.
Referring to Fig.1 8, the gain when being worked in normal orientation in right-handed circular polarization Mid Frequency with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.86dB, and gain declines with the raising of frequency,
Gain declines most serious under 2.99GHz frequency.
Referring to Fig.1 9, using S11 < -10dB and AR < 3dB as standard, antenna is in the 10-dB return loss bandwidth of high band
54.6% (1.85GHz -3.24GHz), 3-dB axial ratio bandwidth are 7.6% (2.9GHz -3.13GHz), show that the antenna realizes
Right-handed circular polarization work, broader bandwidth.
Referring to Figure 20, the antenna pattern in described phi=0 ° in the case where frequency is 3GHz and phi=90 ° of face can from figure
To find out aerial radiation right-handed circular polarization wave, at Theta=0 °, main polarization gain is 4.92dB, and left-handed entelechy accordingly
It is very low to change gain, therefore the design has good circular polarisation purity.
Referring to Figure 21, the gain when being worked in normal orientation in right-handed circular polarization high band with frequency variation relation
Scheme, as can be seen from the figure antenna, on working band, peak gain 6.33dB, and gain declines with the raising of frequency,
Gain declines most serious under 3.24GHz frequency.
It is that any limitation of the invention is not constituted, it is clear that for ability to a specific embodiment of the invention above
It, all may be without departing substantially from the principle of the invention and structure for the professional in domain, then after understanding and connecing the content of present invention and principle
In the case of, various modifications and variations in form and details are carried out, but these modifications and variations based on inventive concept are still
In claim and protection scope of the invention.
Claims (6)
1. a kind of frequency and the restructural broad-band antenna of polarizing, which is characterized in that including medium substrate (1), reflecting plate (3) and same
Axis (4), the medium substrate (1) are fixed on the top of reflecting plate (3), the upper table of the medium substrate (1) by connecting column (2)
Face and lower surface are printed with radiating element (5) respectively, in which:
The radiating element (5), including two shapes are isosceles trapezoid dipole arm (52), which is in
90 ° of arrangements, and connected by 1/4 wavelength phases delay line (51), the 1/4 wavelength phases delay line (51) and two dipoles
Bottom, which is formed by space, on arm (52) is provided with fed patch (53), is etched on the dipole arm (52) flat with its bottom edge
Capable rectangular aperture, be loaded between the rectangular aperture and fed patch (53) and the upper bottom of dipole arm (52) one or
Multiple RF switches (54)；
The radiating element (5) for being printed on medium substrate (1) lower surface, positioned at the spoke for being printed on medium substrate (1) upper surface
Unit (5) is penetrated after 180 ° of the rotation of fed patch (53) center in the projected position of medium substrate (1) lower surface；It is described to be located at Jie
The dipole arm (52) of matter substrate (1) upper and lower surface and 1/4 wavelength phases delay line (51) form cross dipole minor structure, are used to
Realize the broadband character of antenna；
The coaxial line (4), the inner core of the upper end are connected with the fed patch (53) for being printed on medium substrate (1) upper surface, outside
Skin is connected with the fed patch (53) for being printed on medium substrate (1) lower surface, and lower end passes through the through-hole being arranged on reflecting plate (2).
2. a kind of frequency according to claim 1 and the restructural broad-band antenna that polarizes, which is characterized in that the radiation is single
First (5), the center of fed patch (53) therein are located in the centre normal of medium substrate (1), and with two dipole arms
(52) intersection point of symmetry axis is overlapped.
3. a kind of frequency according to claim 1 and the restructural broad-band antenna that polarizes, which is characterized in that the radio frequency is opened
It closes (54), using any one in micro electromechanical system switch, PIN type diode switch and fet switch.
4. a kind of frequency according to claim 1 and the restructural broad-band antenna that polarizes, which is characterized in that the rectangular slits
One or more RF switches (54) are loaded between gap and fed patch (53) and the upper bottom of dipole arm (52), wherein
The RF switch (54) on rectangular aperture is loaded, for realizing the frequency of antenna by being connected to the control with off-state to it
The restructural characteristic of rate；The RF switch (54) between fed patch (53) and dipole arm (52) is loaded, for by it
The control of connection and off-state, realizes the restructural characteristic of the polarization of antenna.
5. a kind of frequency according to claim 1 and the restructural broad-band antenna that polarizes, which is characterized in that the medium base
Plate (1), use relative dielectric constant for 3.5 square plate.
6. a kind of frequency according to claim 1 and the restructural broad-band antenna that polarizes, which is characterized in that the connecting column
(2), using insulating materials.
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| CN201910766890.XA CN110518338A (en) | 2019-08-20 | 2019-08-20 | A kind of frequency and the restructural broad-band antenna that polarizes |
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| CN111641050A (en) * | 2020-06-09 | 2020-09-08 | 中国电子科技集团公司第三十六研究所 | Common-caliber multi-polarization antenna |
| CN111817014A (en) * | 2020-07-29 | 2020-10-23 | 金陵科技学院 | Variable-period reconfigurable active frequency selection surface unit |
| CN113258307A (en) * | 2021-05-28 | 2021-08-13 | 西安电子科技大学 | E-plane wide and narrow beam switching reconfigurable antenna |
| CN113314851A (en) * | 2021-05-19 | 2021-08-27 | 中南大学 | Polarization insensitive frequency reconfigurable super-surface wave absorber |
| CN113410662A (en) * | 2021-06-16 | 2021-09-17 | 东南大学 | Broadband directional diagram reconfigurable antenna based on PIN diode switch |
| WO2022105567A1 (en) * | 2020-11-23 | 2022-05-27 | Huawei Technologies Co.,Ltd. | Dielectrically loaded printed dipole antenna |
| WO2022253144A1 (en) * | 2021-06-04 | 2022-12-08 | 华为技术有限公司 | Metasurface unit and design method therefor |
| CN115603039A (en) * | 2022-01-25 | 2023-01-13 | 江苏科技大学（Cn） | Butterfly frequency reconfigurable antenna based on TSFPE |
| CN116014451A (en) * | 2022-12-01 | 2023-04-25 | 黑龙江大学 | Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch |
| CN117220035A (en) * | 2023-11-07 | 2023-12-12 | 湖南大学 | Circularly polarized magneto-electric dipole antenna |
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| CN111509406A (en) * | 2020-05-12 | 2020-08-07 | 西安电子科技大学 | Polarization and directional diagram composite reconfigurable antenna |
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| CN111817014A (en) * | 2020-07-29 | 2020-10-23 | 金陵科技学院 | Variable-period reconfigurable active frequency selection surface unit |
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| CN113314851A (en) * | 2021-05-19 | 2021-08-27 | 中南大学 | Polarization insensitive frequency reconfigurable super-surface wave absorber |
| CN113258307B (en) * | 2021-05-28 | 2022-06-07 | 西安电子科技大学 | E-plane wide and narrow beam switching reconfigurable antenna |
| CN113258307A (en) * | 2021-05-28 | 2021-08-13 | 西安电子科技大学 | E-plane wide and narrow beam switching reconfigurable antenna |
| WO2022253144A1 (en) * | 2021-06-04 | 2022-12-08 | 华为技术有限公司 | Metasurface unit and design method therefor |
| CN113410662A (en) * | 2021-06-16 | 2021-09-17 | 东南大学 | Broadband directional diagram reconfigurable antenna based on PIN diode switch |
| CN115603039A (en) * | 2022-01-25 | 2023-01-13 | 江苏科技大学（Cn） | Butterfly frequency reconfigurable antenna based on TSFPE |
| CN115603039B (en) * | 2022-01-25 | 2023-11-21 | 江苏科技大学 | Butterfly frequency reconfigurable antenna based on TSFPE |
| CN116014451A (en) * | 2022-12-01 | 2023-04-25 | 黑龙江大学 | Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch |
| CN116014451B (en) * | 2022-12-01 | 2024-05-14 | 黑龙江大学 | Broadband double-back-cavity polarized reconfigurable antenna based on liquid metal switch |
| CN117220035A (en) * | 2023-11-07 | 2023-12-12 | 湖南大学 | Circularly polarized magneto-electric dipole antenna |
| CN117220035B (en) * | 2023-11-07 | 2024-01-09 | 湖南大学 | Circularly polarized magneto-electric dipole antenna |
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