CN111129759A - Integrated broadband circularly polarized rectifying antenna capable of being conformal - Google Patents
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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
- H01Q1/50—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
- H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
- H01Q13/10—Resonant slot antennas
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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
- H01Q15/244—Polarisation converters converting a linear polarised wave into a circular polarised wave
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
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Abstract
The invention discloses a conformal integrated broadband circularly polarized rectifying antenna which comprises a broadband circularly polarized slot antenna and a broadband radio frequency rectifying circuit, wherein the broadband circularly polarized slot antenna comprises a dielectric substrate, and a ground plate and a rectangular feed patch which are respectively distributed on the upper layer and the lower layer of the dielectric substrate, the broadband circularly polarized slot antenna is connected with the broadband radio frequency rectifying circuit through a 50-ohm microstrip line, the broadband circularly polarized slot antenna is used for receiving the radio frequency energy of a space, the broadband radio frequency rectifying circuit converts the radio frequency energy collected by the broadband circularly polarized slot antenna into direct current energy to supply power to portable equipment or a load, and the broadband circularly polarized rectifying antenna integrated with the broadband circularly polarized slot antenna and the broadband radio frequency rectifying circuit is conformal to a cylindrical carrier. The invention can collect the radio frequency energy of 1.7-2.5GHz broadband in space environment and convert the radio frequency energy into direct current to supply power for low-power equipment, and has the advantages of low profile, wide bandwidth, high efficiency, miniaturization and easy conformality.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a conformal integrated broadband circularly polarized rectifying antenna.
Background
Energy harvesting is one of the latest technologies that have received much attention in the last decade. More and more wireless applications are running in everyday life, such as Wi-Fi, bluetooth, 3G and 4G communication, WLAN and GSM 900/1800 MHz. Thus, the environment contains a large amount of electromagnetic energy over a wide frequency range. Most of the electromagnetic energy is gradually dissipated in the environment, and if the energy is collected and used for supplying power to equipment with lower power consumption, the electromagnetic energy has wide application prospect.
High efficiency rectennas for rf energy harvesting have been studied for decades, and most of the previous rf energy harvesting work has focused on single or multi-band rf energy harvesting. Broadband rectennas can collect more power from environmental sources with low radio frequency energy density and produce more output power than single and multi-band. In addition, in the domestic existing rectifying antenna, a receiving antenna and a rectifying circuit are designed into two independent modules, and the two modules are combined together through a coaxial line to form the rectifying antenna, so that the occupied size is large.
Disclosure of Invention
In order to overcome the defects and shortcomings of the prior art, the conformal integrated broadband circularly polarized rectenna is provided, two modules are designed and integrated into the same structure, the occupied area of the rectenna can be greatly reduced, and the rectenna is used for receiving radio frequency energy in a broadband of 1.7-2.5GHz in the environment and converting the radio frequency energy into direct current energy to supply power for portable equipment or loads.
The integrated broadband circularly polarized rectifying antenna comprises a broadband circularly polarized slot antenna and a broadband radio frequency rectifying circuit, wherein the broadband circularly polarized slot antenna comprises a dielectric substrate and rectangular feed patches which are respectively distributed on an upper layer and a lower layer of the dielectric substrate, the broadband circularly polarized slot antenna and the broadband radio frequency rectifying circuit are connected through a 50-ohm microstrip line, the broadband circularly polarized slot antenna is used for receiving spatial radio frequency energy, the broadband radio frequency rectifying circuit converts the radio frequency energy collected by the broadband circularly polarized slot antenna into direct current energy to supply power to portable equipment or loads, and the integrated broadband circularly polarized rectifying antenna after the broadband circularly polarized slot antenna and the broadband radio frequency rectifying circuit are integrated is conformal to a cylindrical carrier. After the film is conformed to the surface of a cylindrical carrier with the curvature radius of about 50mm, the impedance bandwidth and the axial ratio bandwidth are respectively 43 percent (1.68-2.6GHz) and 61 percent (1.7-3.2 GHz). Can receive circularly polarized waves in a frequency band of 1.7-2.6 GHz.
As a further improvement of the above scheme, a C-shaped slot with a stepped left edge is etched on the ground plate.
As a further improvement of the above scheme, the rectangular feed patch is placed on the back surface of the dielectric substrate and is located at the lower right corner of the C-shaped slot.
As a further improvement of the scheme, the broadband radio frequency rectifying circuit is connected with the rectangular feed patch of the broadband circularly polarized slot antenna through a 50-ohm microstrip line.
As a further improvement of the above scheme, the broadband radio frequency rectification circuit is composed of a broadband impedance matching network, a single-order voltage-multiplying rectification circuit and a load, wherein the single-order voltage-multiplying rectification circuit comprises capacitors C3 and C4, and diodes D1 and D2; the broadband radio frequency rectification circuit comprises L1, C1, L2, C2, L3, L4, L5 and L6; the load resistor is RL, one end of a capacitor C3 in the broadband radio frequency rectification circuit is connected with an inductor L4 of the broadband radio frequency rectification circuit, the other end of the capacitor C3 is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of the diode D2 is connected with an inductor L5 of the broadband radio frequency rectification circuit, the other end of an inductor L5 is grounded, the cathode of a diode D1 is connected with one end of an inductor L6, the other end of an inductor L6 is respectively connected with one end of the capacitor C2 and one end of the load RL, and one end of the other end of a capacitor C4 and.
As a further improvement of the above scheme, the wideband impedance matching network comprises four parts, the first part comprises a bandpass matching circuit consisting of an inductor L1, a capacitor C1, a series inductor L2 and a capacitor C2 which are connected in parallel, the connection point of the inductor L1, the capacitor C1, the series inductor L2 and the capacitor C2 which are connected in parallel is connected with a 50 Ω connection line, and meanwhile, the other ends of the parallel inductor L1 and the capacitor C1 are connected with a ground plate through holes; the second part is an L-shaped low-frequency matching network consisting of parallel inductors L3 and L4, the L-shaped low-frequency matching network is directly cascaded with the first part, and one end of the inductor L3 is short-circuited and grounded; one end of the L4 is connected with a voltage-doubling broadband radio frequency rectification circuit, and the third part comprises an inductor L6 which is inserted between the voltage-doubling broadband radio frequency rectification circuit D1 and the inductor C4, so that the matching performance in the whole frequency band is improved; the fourth part includes an inductor L5, which adds a new resonance point at high frequencies, expanding the impedance bandwidth.
The broadband radio frequency rectification circuit can rectify signals in the frequency range of 1.7-2.5GHz (frequency ranges covering GSM-1800/4G, 3G/UMTS-2100, WLAN and the like) in the environment and convert the signals into direct current to supply power for low-power equipment; when the load resistor RL is 4k omega and the radio frequency energy power in the environment is-5 dBm, the rectification efficiency of the broadband radio frequency rectification circuit in the whole frequency band reaches more than 50 percent, and the maximum voltage of the output end reaches 860 mV; when the radio frequency energy power is-10 dBm, the rectification efficiency of the broadband radio frequency rectification circuit in the whole frequency band reaches more than 40 percent, and the maximum voltage of the output end reaches 440 mV; when the radio frequency energy power is-15 dBm, the rectification efficiency of the broadband radio frequency rectification circuit in the whole frequency band reaches more than 25%, and the maximum voltage of the output end reaches 210 mV.
As a further improvement of the scheme, the length multiplied by the width multiplied by the height of the dielectric substrate is 75 multiplied by 0.254mm3。
As a further improvement of the scheme, the C-shaped gaps are symmetrically arranged at the center of the dielectric substrate, the total length is set to be 60mm, the total width is set to be 60mm, and each step is set to be 12mm multiplied by 12 mm.
As a further improvement of the above scheme, the wideband circularly polarized rectenna integrated with the wideband radio frequency rectifying circuit is conformal to a cylindrical carrier with a curvature radius of about 50 mm.
As a further improvement of the scheme, the dielectric substrate is made of Roger4350B, the dielectric constant of the dielectric substrate is 3.48, and the loss tangent of the dielectric substrate is 0.0037.
The invention has the beneficial effects that:
compared with the prior art, the conformal integrated broadband circularly polarized rectenna provided by the invention integrates two module designs into the same structure, can greatly reduce the occupied area of the rectenna, and is used for receiving radio frequency energy in a broadband of 1.7-2.5GHz in the environment and converting the radio frequency energy into direct current energy to supply power for portable equipment or loads.
Drawings
The following detailed description of embodiments of the invention is provided in conjunction with the appended drawings, in which:
FIG. 1 is a schematic diagram of the overall structure of an integrated broadband circularly polarized rectenna of the present invention;
FIG. 2 is a schematic structural diagram of the integrated broadband circularly polarized rectenna of the present invention after conforming;
FIG. 3 is a schematic diagram of a wideband RF rectifier circuit according to the present invention;
FIG. 4 is a schematic diagram of the circuit topology of the wideband RF rectifier circuit of the present invention;
FIG. 5 is a reflection coefficient of a conformal broadband circularly polarized slot antenna of the present invention;
FIG. 6 is an axial ratio and gain of the conformal broadband circularly polarized slot antenna of the present invention;
FIG. 7 is the directional diagrams of the conformal broadband circularly polarized slot antenna of the invention in the XOZ plane and the YOZ plane respectively when the frequency is 1.8 GHz;
FIG. 8 is the directional diagrams of the conformal broadband circularly polarized slot antenna of the present invention in the XOZ plane and the YOZ plane, respectively, at a frequency of 2.1 GHz;
FIG. 9 is the directional diagrams of the conformal broadband circularly polarized slot antenna of the present invention in the XOZ plane and the YOZ plane, respectively, at a frequency of 2.45 GHz;
FIG. 10 is a reflection coefficient of the wideband RF rectifier circuit of the present invention;
FIG. 11 shows the rectification efficiency of the wideband RF rectifier circuit according to the present invention;
FIG. 12 is a top and side view of a broadband circularly polarized slot antenna of the present invention;
FIG. 13 is an evolution of the broadband circularly polarized slot antenna of the present invention;
fig. 14 shows simulation results of the wideband circularly polarized slot antenna at each step of the present invention.
Detailed Description
As shown in fig. 1, the conformally integrated broadband circularly polarized rectifying antenna provided by the invention comprises a broadband circularly polarized slot antenna and a broadband radio frequency rectifying circuit 5, wherein the broadband circularly polarized slot antenna comprises a dielectric substrate 3, and a ground plate 1 and a rectangular feed patch 4 which are respectively distributed on the upper layer and the lower layer of the dielectric substrate 3, the broadband circularly polarized slot antenna is connected with the broadband radio frequency rectifying circuit 5 through a 50 Ω microstrip line 6, the broadband circularly polarized slot antenna is used for receiving spatial radio frequency energy, the broadband radio frequency rectifying circuit 5 converts the radio frequency energy collected by the broadband circularly polarized slot antenna into direct current energy to supply power to portable equipment or loads, and the broadband circularly polarized rectifying antenna after the broadband circularly polarized slot antenna and the broadband radio frequency rectifying circuit 5 are integrated is conformally arranged on a cylindrical carrier. After the film is conformed to the surface of a cylindrical carrier with the curvature radius of about 50mm, the impedance bandwidth and the axial ratio bandwidth are respectively 43 percent (1.68-2.6GHz) and 61 percent (1.7-3.2 GHz). The conformal integrated broadband circularly polarized rectenna structure is shown in fig. 2, and is used for receiving radio frequency energy of 1.7-2.5GHz in the environment and converting the radio frequency energy into direct current energy to supply power for portable equipment or loads.
The improvement is further that a C-shaped gap with a stepped left edge is etched on the grounding plate 1, the C-shaped gaps are symmetrically arranged at the center of the dielectric substrate 3, the total length is set to be 60mm, the total width is set to be 60mm, and each step is set to be 12 multiplied by 12 mm.
The dielectric substrate 3 has a length, width and height of 75X 0.254mm3. The dielectric substrate 3 was made of Roger4350B, which had a dielectric constant of 3.48 and a loss tangent of 0.0037.
In further improvement, the rectangular feed patch 4 is placed on the back of the dielectric substrate 3 and is positioned at the lower right corner of the C-shaped slot.
In further improvement, a broadband radio frequency rectification circuit 5 is connected with a rectangular feed patch 4 of the broadband circularly polarized slot antenna through a 50-omega microstrip line 6.
FIG. 3 is a schematic diagram of the structure of the broadband RF rectifier circuit 5 of the present invention; fig. 4 is a schematic diagram of a circuit topology of the wideband radio frequency rectification circuit 5 of the present invention, the wideband radio frequency rectification circuit 5 is composed of a wideband impedance matching network, a single-order voltage-doubling rectification circuit and a load, wherein the single-order voltage-doubling rectification circuit includes capacitors C3 and C4, and diodes D1 and D2; the broadband radio frequency rectification circuit 5 comprises L1, C1, L2, C2, L3, L4, L5 and L6; the load resistor is RL, one end of a capacitor C3 in the broadband radio frequency rectification circuit 5 is connected with an inductor L4 of the broadband radio frequency rectification circuit 5, the other end of the capacitor C3 is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of the diode D2 is connected with an inductor L5 of the broadband radio frequency rectification circuit 5, the other end of an inductor L5 is grounded, the cathode of a diode D1 is connected with one end of an inductor L6, the other end of the inductor L6 is respectively connected with one end of the capacitor C2 and one end of a load RL, and one end of the other end of the capacitor C4 and.
In a further improvement, the broadband impedance matching network comprises four parts, the first part comprises a band-pass matching circuit consisting of an inductor L1, a capacitor C1, a series inductor L2 and a capacitor C2 which are connected in parallel, the connection point of the inductor L1, the capacitor C1, the series inductor L2 and the capacitor C2 which are connected in parallel is connected with a 50-ohm connection wire, and meanwhile, the other ends of the inductor L1 and the capacitor C1 which are connected in parallel are connected with the ground plate 1 through a hole 7; the second part is an L-shaped low-frequency matching network consisting of parallel inductors L3 and L4, the L-shaped low-frequency matching network is directly cascaded with the first part, and one end of the inductor L3 is short-circuited and grounded; one end of the L4 is connected with the voltage-doubling broadband radio frequency rectification circuit 5, the third part comprises an inductor L6 which is inserted between the D1 and the C4 of the voltage-doubling broadband radio frequency rectification circuit 5, and the matching performance in the whole frequency band is improved; the fourth part includes an inductor L5, which adds a new resonance point at high frequencies, expanding the impedance bandwidth.
The broadband radio frequency rectification circuit 5 can rectify signals in the frequency range of 1.7-2.5GHz (frequency ranges covering GSM-1800/4G, 3G/UMTS-2100, WLAN and the like) in the environment and convert the signals into direct current to supply power for low-power equipment; when the load resistance RL is 4k omega and the radio frequency energy power in the environment is-5 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 50 percent, and the maximum voltage of the output end reaches 860 mV; when the radio frequency energy power is-10 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 40 percent, and the maximum voltage of the output end reaches 440 mV; when the radio frequency energy power is-15 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 25%, and the maximum voltage of the output end reaches 210 mV.
The reflection coefficients of the conformal integrated broadband circularly polarized rectenna of the present implementation are listed in fig. 5. Within the frequency range of 1.68-2.6GHz, the reflection coefficient S11< -10dB and the impedance bandwidth reach 43 percent, which shows that the antenna has the effect of wide frequency and covers the frequency ranges of GSM-1800, UMTS-2100 and WLAN.
The axial ratio and gain of the conformal integrated broadband circularly polarized rectenna of the present implementation are listed in fig. 6. It can be seen from the figure that the axial ratio AR <3dB in the range of 1.7-3.2GHz indicates that the antenna has a circular polarization effect. The gain of the antenna is larger than 4dBi in the frequency band of 1.7-2.5 GHz.
Fig. 7-9 show normalized directional diagrams of the XOZ plane and the YOZ plane of the conformal integrated broadband circularly polarized rectenna at three frequency points of 1.8, 2.1 and 2.45GHz, respectively. At three frequency points, the antenna has good left-handed circularly polarized radiation performance on an XOZ plane and an YOZ plane along the positive direction of a Z axis.
FIG. 10 shows the reflection coefficients at the input of the wideband RF rectifier circuit 5 at input powers of-5 dBm, -10dBm and-15 dBm. With the decrease of the input power, the impedance matching of the input end of the broadband radio frequency rectification circuit 5 gradually becomes worse.
When the input power of the broadband radio frequency rectification circuit 5 is-5 dBm, -10dBm and-15 dBm, the rectification efficiency changes with the frequency as shown in FIG. 11. The result shows that the broadband rectifier can realize the performance characteristics of high broadband and high efficiency. When the input power is-5 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 50 percent; when the input power is-10 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 40 percent; when the input power is-15 dBm, the rectification efficiency of the broadband radio frequency rectification circuit 5 in the whole frequency band reaches more than 25 percent.
Fig. 12 shows top and side views of a designed broadband circularly polarized slot antenna. The dielectric substrate 3 adopted by the broadband circularly polarized slot antenna is RO4350B, the relative dielectric constant is 3.48, and the thickness is 0.254 mm. The ground plate 1 etched with the C-shaped slot 2 is arranged above the dielectric substrate 3, and the rectangular feed patch 4 is arranged below the dielectric substrate, wherein the rectangular feed patch 4 is fed by a section of 50 omega microstrip feed line with the width of 0.55 mm. The overall dimensions of the broadband circularly polarized slot antenna are 75 x 0.254mm 3.
Fig. 13 shows an evolution process of the wideband circularly polarized slot antenna, which can be divided into four steps, and a simulation result of the wideband circularly polarized slot antenna in each step is shown in fig. 14. First, the broadband circular polarization slot antenna etches a rectangular ring slot on the grounding plate 1, and can generate basic linear polarization resonance.
The broadband circularly polarized slot antenna 2 has the grounding part inside the rectangular slot shifted to the right on the basis of the broadband circularly polarized slot antenna 1 to form a C-shaped slot 2, so that circularly polarized radiation is generated. The simulation results in fig. 14 show that the axial ratio AR of the broadband circularly polarized slot antenna No. 2 is reduced to below 10dB in the range of 1-2.5 GHz. The broadband circular polarization slot antenna No. 3 moves the rectangular feed patch 4 at the bottom of the dielectric substrate 3 to the right for improving matching. The broadband circular polarization slot antenna No. 4 etches the edge of the C-shaped slot 2 etched on the grounding plate 1 into a ladder shape, so that the axial ratio performance of the broadband circular polarization slot antenna is improved, and as can be seen from the enlarged view on the right of the figure 14 (b), the axial ratio of the broadband circular polarization slot antenna in the frequency band range of 1.8-3.2GHz is lower than 3 dB.
The above embodiments are not limited to the technical solutions of the embodiments themselves, and the embodiments may be combined with each other into a new embodiment. The above embodiments are only for illustrating the technical solutions of the present invention and are not limited thereto, and any modification or equivalent replacement without departing from the spirit and scope of the present invention should be covered within the technical solutions of the present invention.
Claims (10)
1. A conformal integrated broadband circularly polarized rectenna is characterized in that: the broadband circularly polarized slot antenna comprises a dielectric substrate, a grounding plate and a rectangular feed patch, wherein the grounding plate and the rectangular feed patch are respectively distributed on the upper layer and the lower layer of the dielectric substrate, the broadband circularly polarized slot antenna and the broadband radio frequency rectification circuit are connected through a 50-ohm microstrip line, the broadband circularly polarized slot antenna is used for receiving spatial radio frequency energy, the broadband radio frequency rectification circuit converts the radio frequency energy collected by the broadband circularly polarized slot antenna into direct current energy to supply power for portable equipment or loads, and the broadband circularly polarized rectification antenna integrated with the broadband radio frequency rectification circuit is conformal to a cylindrical carrier.
2. The conformable integrated broadband circularly polarized rectenna of claim 1, wherein: and etching a C-shaped gap with a stepped left edge on the grounding plate.
3. The conformable integrated broadband circularly polarized rectenna of claim 2, wherein: the rectangular feed patch is placed on the back of the dielectric substrate and is positioned at the lower right corner of the C-shaped gap.
4. The conformable integrated broadband circularly polarized rectenna of claim 3, wherein: the broadband radio frequency rectifying circuit is connected with the rectangular feed patch of the broadband circularly polarized slot antenna through a 50-omega microstrip line.
5. The conformable integrated broadband circularly polarized rectenna of claim 1, wherein: the broadband radio frequency rectification circuit is composed of a broadband impedance matching network, a single-order voltage-multiplying rectification circuit and a load, wherein the single-order voltage-multiplying rectification circuit comprises capacitors C3 and C4 and diodes D1 and D2; the broadband radio frequency rectification circuit comprises L1, C1, L2, C2, L3, L4, L5 and L6; the load resistor is RL, one end of a capacitor C3 in the broadband radio frequency rectification circuit is connected with an inductor L4 of the broadband radio frequency rectification circuit, the other end of the capacitor C3 is connected with the anode of a diode D1 and the cathode of a diode D2, the anode of the diode D2 is connected with an inductor L5 of the broadband radio frequency rectification circuit, the other end of an inductor L5 is grounded, the cathode of a diode D1 is connected with one end of an inductor L6, the other end of an inductor L6 is respectively connected with one end of the capacitor C2 and one end of the load RL, and one end of the other end of a capacitor C4 and.
6. The conformable integrated broadband circularly polarized rectenna of claim 5, wherein: the broadband impedance matching network comprises four parts, the first part comprises a band-pass matching circuit consisting of an inductor L1, a capacitor C1, a series inductor L2 and a capacitor C2 which are connected in parallel, the connection point of the inductor L1, the capacitor C1, the series inductor L2 and the capacitor C2 which are connected in parallel is connected with a 50-ohm connection wire, and meanwhile, the other ends of the inductor L1 and the capacitor C1 which are connected in parallel are connected with a ground plate through holes; the second part is an L-shaped low-frequency matching network consisting of parallel inductors L3 and L4, the L-shaped low-frequency matching network is directly cascaded with the first part, and one end of the inductor L3 is short-circuited and grounded; one end of the L4 is connected with a voltage-doubling broadband radio frequency rectification circuit, and the third part comprises an inductor L6 which is inserted between the voltage-doubling broadband radio frequency rectification circuit D1 and the inductor C4, so that the matching performance in the whole frequency band is improved; the fourth part includes an inductor L5, which adds a new resonance point at high frequencies, expanding the impedance bandwidth.
7. The conformable integrated broadband circularly polarized rectenna of claim 2, wherein: the length, the width and the height of the dielectric substrate are 75 mm, 75 mm and 0.254mm3。
8. The conformable integrated broadband circularly polarized rectenna of claim 7, wherein: the C-shaped gaps are symmetrically arranged in the center of the dielectric substrate, the total length is set to be 60mm, the total width is set to be 60mm, and each step is set to be 12mm multiplied by 12 mm.
9. The conformable integrated broadband circularly polarized rectenna of claim 8, wherein: the broadband circularly polarized rectifying antenna formed by integrating the broadband circularly polarized slot antenna and the broadband radio frequency rectifying circuit is conformal to a cylindrical carrier with the curvature radius of about 50 mm.
10. The conformable integrated broadband circularly polarized rectenna of claim 1, wherein: the dielectric substrate is made of Roger4350B, the dielectric constant of the dielectric substrate is 3.48, and the loss tangent of the dielectric substrate is 0.0037.
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| CN113437502A (en) * | 2021-06-23 | 2021-09-24 | 哈尔滨工程大学 | Dual-frequency circularly polarized rectifying antenna |
| CN114649683A (en) * | 2022-04-01 | 2022-06-21 | 北京邮电大学 | Double-frequency ultra-wideband flexible environment energy collector |
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| LEI ZHANG、WENMEI ZHANG、XINWEI CHEN: "Design of a Compact Conformal Circularly Polarized Rectenna", 《 2019 INTERNATIONAL WORKSHOP ON ELECTROMAGNETICS: APPLICATIONS AND STUDENT INNOVATION COMPETITION (IWEM)》 * |
| YANG YANG、JUN LI、LU LI、YILIN LIU: "A 5.8 GHz Circularly Polarized Rectenna With Harmonic Suppression and Rectenna Array for Wireless Power Transfer", 《 IEEE ANTENNAS AND WIRELESS PROPAGATION LETTERS 》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437502A (en) * | 2021-06-23 | 2021-09-24 | 哈尔滨工程大学 | Dual-frequency circularly polarized rectifying antenna |
| CN114649683A (en) * | 2022-04-01 | 2022-06-21 | 北京邮电大学 | Double-frequency ultra-wideband flexible environment energy collector |
| CN114649683B (en) * | 2022-04-01 | 2022-12-09 | 北京邮电大学 | Double-frequency ultra-wideband flexible environment energy collector |
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