CN117639528A - Compact high-efficiency broadband radio frequency rectifier based on parallel resonance impedance compression matching network - Google Patents
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- CN117639528A CN117639528A CN202311679146.9A CN202311679146A CN117639528A CN 117639528 A CN117639528 A CN 117639528A CN 202311679146 A CN202311679146 A CN 202311679146A CN 117639528 A CN117639528 A CN 117639528A
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Abstract
The invention provides a compact high-efficiency broadband radio frequency rectifier based on a parallel resonance impedance compression matching network. By modeling the distributed and aggregate parameter elements, a novel compact broadband matching network is constructed. In order to make the imaginary part of the impedance symmetrical, a monopole transmission line is adopted, and the problem of broadband impedance matching is solved by screening the optimal Q value of the LC impedance compression network. After the LC impedance compression network is added, the impedance at the LC resonance point becomes the real impedance, and other frequency points are compressed. The working frequency band of the radio frequency rectifier is 0.9 GHz-2.4 GHz, and the highest measurement efficiency can reach 74.28% when the input power is 8dBm in the frequency range. When the center frequency is 1.6GHz and the terminal load is 1.9kΩ, the broadband of 1 GHz-2.1 GHz can be realized, and the efficiency is more than 60%. In addition, even if the input power is 0dBm, the measurement efficiency value at 1 GHz-2.1 GHz is maintained above 40%. The radio frequency rectifier has the advantages of small volume, low cost, simple structure, wide frequency band, high conversion efficiency and the like.
Description
Technical Field
The invention belongs to the technical field of radio frequency environment energy collection, and particularly relates to a compact high-efficiency broadband radio frequency rectifier based on a parallel resonance impedance compression matching network.
Background
The radio frequency rectifier is an indispensable functional device in the field of radio frequency environment energy collection, and has the main function of converting radio frequency beams in the environment into electric energy so as to realize energy conversion.
With the rapid development of mobile communication. We are surrounded by rf energy throughout the day. Radio and television towers, satellites around the earth, and even cell phone antennas are constantly transmitting energy. This necessitates that the radio frequency rectifier have broadband performance.
Meanwhile, the radio frequency rectification efficiency is an important index for measuring the performance of the radio frequency rectification circuit, and in the fields of microwave wireless energy transmission and wireless communication, the radio frequency rectifier is required to have good rectification efficiency in a certain wave band, and the radio frequency rectifier is required to have the characteristic of high conversion efficiency.
Disclosure of Invention
The invention aims at: aiming at the defects or improvement demands in the prior art, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is provided, the resonance impedance compression network is added on the basis of a rectifier circuit, and the impedance matching can be completed through a simple transmission line, so that the effects of reducing the complexity of a circuit and the area of the circuit are achieved. In addition, by introducing high-precision capacitance and inductance as an impedance compression network, the stability of the circuit is improved, so that the circuit is more suitable for being realized in a high-frequency environment.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a compact high efficiency wideband radio frequency rectifier based on a parallel resonant impedance compression matching network, comprising: four capacitors: a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4; an inductance L1; a resistor RL; a transmission line having a first characteristic impedance of 55.2 omega and an electrical length of 27 DEG; two schottky diodes: diode D1 and diode D2, its characterized in that:
the capacitor C1 is connected with the inductor L1 in parallel; a transmission line with the first characteristic impedance of 55.2 omega and the electrical length of 27 DEG is connected with a capacitor C2; the other end of the transmission line is connected with the common junction of the cathode of the diode D1 and the anode of the diode. The anode of the diode D1 is grounded, and the cathode of the diode D2 is connected with the common terminal of the capacitor C3, the capacitor C4 and the resistor RL.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: the vibration impedance compression network is composed of a capacitor C1 and an inductor L1 by adopting lumped parameter elements, wherein the dimensions of the elements are cuboid with the length of 1mm, the width of 0.5mm and the height of 0.3 mm.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: the length of the transmission line with the first characteristic impedance of 55.2 omega and the electric length of 27 degrees is the electric length of 27 degrees under the working frequency.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: the working frequency band of the radio frequency rectifier is 1 GHz-2.1 GHz.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: when the input power of the radio frequency rectifier is 0dBm, the radio frequency rectification efficiency of the radio frequency rectifier is more than 40% within the bandwidth of 1 GHz-2.1 GHz.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: when the input power of the radio frequency rectifier is 8dBm, the radio frequency rectification efficiency is above 60% within the bandwidth of 1 GHz-2.1 GHz.
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: the rf rectifier has an input power of 8dBm and an rf rectification efficiency of up to 74.28% at a frequency of 1.6 GHz.
The beneficial effects generated by adopting the scheme are as follows:
the invention effectively increases the working bandwidth of the radio frequency rectifier by adopting the resonance compression network, and simultaneously effectively improves the rectifying efficiency of the radio frequency rectifier by adopting the voltage doubling rectifying circuit structure; the device has the advantages of simple structure, small volume, low cost, wide frequency band, high efficiency and the like.
Drawings
Fig. 1 is a block diagram of a radio frequency circuit of the present invention.
Fig. 2 is a graph showing conversion efficiency of the rf rectifier at 0dBm and 8dBm of the input power, respectively, according to an embodiment of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1, a compact high-efficiency broadband radio frequency rectifier based on a parallel resonant impedance compression matching network provided in an embodiment of the present invention includes: four capacitors: a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4; an inductance L1; a resistor RL; a transmission line having a first characteristic impedance of 55.2 omega and an electrical length of 27 DEG; two schottky diodes: diode D1 and diode D2, its characterized in that:
the capacitor C1 is connected with the inductor L1 in parallel; a transmission line with the first characteristic impedance of 55.2 omega and the electrical length of 27 DEG is connected with a capacitor C2; the other end of the transmission line is connected with the common junction of the cathode of the diode D1 and the anode of the diode. The anode of the diode D1 is grounded, and the cathode of the diode D2 is connected with the common terminal of the capacitor C3, the capacitor C4 and the resistor RL.
For the sake of accuracy and convenience in implementation of the scheme, further, the resonant impedance compression network is formed by connecting lumped parameter elements C1 and L1 in parallel, and finally determined resonant impedance compression network element parameters are shown in table 1.
Table 1 resonant compression network element parameters
Further, the compact high-efficiency broadband radio frequency rectifier based on the parallel resonance impedance compression matching network is characterized in that: the length of the transmission line with the first characteristic impedance of 55.2 omega and the electric length of 27 degrees is the electric length of 27 degrees under the working frequency. The dielectric constant of the substrate was 2.65, the thickness was 0.8mm, the length was 24mm, and the width was 10mm.
Further, the voltage-doubler is rectified, then passes through a direct current filter structure and is connected with a load resistor RL. The component parameters of the finally determined dc filter are shown in table 2.
Table 2 element parameters of dc filter
Further, the efficiency of the present rf rectifier is shown in fig. 2, where it can be seen that the rf rectifier has an rf rectification efficiency of 40% or more in a bandwidth of 1 GHz-2.1 GHz when the input power is 0 dBm.
Further, the efficiency of the present rf rectifier is shown in fig. 2, where it can be seen that the rf rectifier has an rf rectification efficiency of 60% or more in a bandwidth of 1 GHz-2.1 GHz when the input power is 8 dBm.
The invention briefly works on the principle:
in order to achieve the small volume and broadband performance of the radio frequency rectifier, the radio frequency rectifier with the lumped parameter impedance compression structure is adopted, so that the working bandwidth of the radio frequency rectifier is effectively improved, and then the rectifying efficiency of the radio frequency rectifier is improved by installing the radio frequency rectifier in the voltage doubling rectifying structure of the matching network; the volume of the radio frequency rectifier is further reduced after loading it with the resonant compression impedance of the capacitor C1 and the inductance L1.
Claims (7)
1. A compact high efficiency wideband radio frequency rectifier based on a parallel resonant impedance compression matching network, comprising: four capacitors: a capacitor C1, a capacitor C2, a capacitor C3, and a capacitor C4; an inductance L1; a resistor RL; a transmission line having a first characteristic impedance of 55.2 omega and an electrical length of 27 DEG; two schottky diodes: diode D1 and diode D2, its characterized in that: the capacitor C1 is connected with the inductor L1 in parallel; a transmission line with the first characteristic impedance of 55.2 omega and the electrical length of 27 DEG is connected with a capacitor C2; the other end of the transmission line is connected with the common junction of the cathode of the diode D1 and the anode of the diode. The anode of the diode D1 is grounded, and the cathode of the diode D2 is connected with the common terminal of the capacitor C3, the capacitor C4 and the resistor RL.
2. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: the vibration impedance compression network is composed of a capacitor C1 and an inductor L1 by adopting lumped parameter elements, wherein the dimensions of the elements are cuboid with the length of 1mm, the width of 0.5mm and the height of 0.3 mm.
3. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: the length of the transmission line with the first characteristic impedance of 55.2 omega and the electric length of 27 degrees is the electric length of 27 degrees under the working frequency.
4. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: the working frequency band of the radio frequency rectifier is 1 GHz-2.1 GHz.
5. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: when the input power of the radio frequency rectifier is 0dBm, the radio frequency rectification efficiency of the radio frequency rectifier is more than 40% within the bandwidth of 1 GHz-2.1 GHz.
6. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: when the input power of the radio frequency rectifier is 8dBm, the radio frequency rectification efficiency is above 60% within the bandwidth of 1 GHz-2.1 GHz.
7. The compact, high efficiency, wideband radio frequency rectifier based on a parallel resonant impedance compression matching network of claim 1, wherein: the rf rectifier has an input power of 8dBm and an rf rectification efficiency of up to 74.28% at a frequency of 1.6 GHz.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311679146.9A CN117639528A (en) | 2023-12-07 | 2023-12-07 | Compact high-efficiency broadband radio frequency rectifier based on parallel resonance impedance compression matching network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311679146.9A CN117639528A (en) | 2023-12-07 | 2023-12-07 | Compact high-efficiency broadband radio frequency rectifier based on parallel resonance impedance compression matching network |
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| CN117639528A true CN117639528A (en) | 2024-03-01 |
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| CN202311679146.9A Pending CN117639528A (en) | 2023-12-07 | 2023-12-07 | Compact high-efficiency broadband radio frequency rectifier based on parallel resonance impedance compression matching network |
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- 2023-12-07 CN CN202311679146.9A patent/CN117639528A/en active Pending
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