Radio frequency rectification circuit, antenna module and electronic equipment

Abstract

The invention relates to a radio frequency rectifying circuit, an antenna module and electronic equipment, the radio frequency rectifying circuit comprises a plurality of voltage doubling rectifying units, and the voltage doubling rectifying units are coupled in sequence; the radio frequency rectifying circuit is used for receiving a radio frequency signal and boosting and rectifying the radio frequency signal through at least one voltage doubling rectifying unit so as to output a first direct current voltage; wherein at least one voltage doubling rectifying unit comprises a diode and a bias power supply, and the bias power supply is coupled with the diode in series and is used for compensating the conduction voltage drop of the diode. The first direct-current voltage is increased by compensating the conduction voltage drop of the diode, and the radio frequency energy loss caused by the conduction voltage drop is reduced, so that the radio frequency energy conversion efficiency is improved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of radio frequency energy collection, and in particular to a radio frequency rectification circuit, an antenna module and an electronic device. Background Art

[0002] At present, with the development of wireless power communication technology, more and more low-power electronic devices can be powered by radio frequency energy to reduce the dependence of electronic devices on batteries. However, after receiving radio frequency energy, the radio frequency rectifier circuit has the problem of low radio frequency energy conversion efficiency. Summary of the invention

[0003] In order to overcome the problems existing in the related art, the present disclosure provides a radio frequency rectification circuit, an antenna module and an electronic device.

[0004] According to a first aspect of the present disclosure, a radio frequency rectifier circuit is provided, the radio frequency rectifier circuit comprising a plurality of voltage doubler rectifier units, each of the voltage doubler rectifier units being coupled in sequence; the radio frequency rectifier circuit is used to receive a radio frequency signal, and boost and rectify the radio frequency signal through at least one of the voltage doubler rectifier units to output a first DC voltage;

[0005] Among them, at least one of the voltage doubler rectifier units includes a diode and a bias power supply, and the bias power supply is coupled in series with the diode to compensate for the conduction voltage drop of the diode.

[0006] In some embodiments of the present disclosure, the anode of the diode is coupled to the positive electrode of the bias power supply; or, the cathode of the diode is coupled to the negative electrode of the bias power supply.

[0007] In some embodiments of the present disclosure, in each of the voltage doubler rectifier units, at least the first stage of the voltage doubler rectifier unit includes the diode and the bias power supply coupled in series.

[0008] In some embodiments of the present disclosure, each of the voltage doubler rectifier units includes an energy storage capacitor, and the radio frequency signal is coupled to the voltage doubler rectifier unit of the next stage through the energy storage capacitor of the voltage doubler rectifier unit of the previous stage.

[0009] In some embodiments of the present disclosure, each of the voltage doubler rectifier units includes the diode and the bias power supply coupled in series, the preset node of the voltage doubler rectifier unit of the previous stage is coupled with the bias power supply or the diode of the voltage doubler rectifier unit of the next stage, and the preset node is a node formed by coupling the energy storage capacitor of the voltage doubler rectifier unit with the diode or the bias power supply;

[0010] The odd-numbered and even-numbered voltage doubler rectifying units are respectively coupled to different ends of the radio frequency signal.

[0011] In some embodiments of the present disclosure, the energy storage capacitors of at least two of the voltage doubler rectifying units are used to couple with a first electrical device;

[0012] The larger the number of stages of the voltage doubler rectifying unit, the larger the supply voltage required by the first electrical device coupled to the energy storage capacitor.

[0013] In some embodiments of the present disclosure, the second DC voltage output by the bias power supply is the same as the conduction voltage drop of the diode.

[0014] In some embodiments of the present disclosure, the diode is a Schottky diode; and / or the bias power supply includes a battery.

[0015] According to a second aspect of the present disclosure, an antenna module is provided, which includes an antenna radiator and the RF rectifier circuit as described above, wherein the antenna radiator is coupled to the RF rectifier circuit, and the antenna radiator sends the RF signal to the RF rectifier circuit.

[0016] In some embodiments of the present disclosure, the antenna module also includes a frequency modulation module, which is arranged between the antenna radiator and the RF rectification circuit, and the frequency modulation module is used to adjust the signal received by the antenna radiator to the RF signal of a preset frequency and send it to the RF rectification circuit.

[0017] According to a third aspect of the present disclosure, an electronic device is provided, comprising a first electrical device and the radio frequency rectifier circuit as described above, wherein the radio frequency rectifier circuit outputs the first DC voltage to the first electrical device.

[0018] According to a fourth aspect of the present disclosure, an electronic device is provided, comprising a second electrical device and the antenna module as described above, wherein the radio frequency rectifier circuit of the antenna module outputs the first DC voltage to the second electrical device.

[0019] In some embodiments of the present disclosure, the electronic device further includes an antenna radiator, which is coupled to the radio frequency rectification circuit, and the antenna radiator sends the radio frequency signal to the radio frequency rectification circuit.

[0020] In some embodiments of the present disclosure, the electronic device also includes a frequency modulation module, which is arranged between the antenna radiator and the RF rectifier circuit, and the frequency modulation module is used to adjust the signal received by the antenna radiator to the RF signal of a preset frequency and send it to the RF rectifier circuit.

[0021] The technical solution provided by the embodiments of the present disclosure may have the following beneficial effects:

[0022] The radio frequency rectification circuit includes a plurality of voltage doubling rectification units coupled in sequence, and the radio frequency signal is boosted and rectified by the voltage doubling rectification units to output a first DC voltage, and a first electrical device in the electronic device is supplied with DC power. At least one voltage doubling rectification unit includes a diode and a bias power supply coupled in series, and the conduction voltage drop of the diode is compensated by the bias power supply to reduce the influence of the conduction voltage drop on the first DC voltage. By compensating the conduction voltage drop of the diode to increase the first DC voltage, the radio frequency energy loss caused by the conduction voltage drop is reduced, thereby improving the efficiency of radio frequency energy conversion.

[0023] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] Figure 1 It is a schematic diagram of an application scenario of a radio frequency rectifier circuit;

[0026] Figure 2 It is a structural schematic diagram of a radio frequency rectification circuit;

[0027] Figure 3-1 is a structural schematic diagram of a radio frequency rectification circuit provided by an exemplary embodiment of the present disclosure;

[0028] Figure 3-2 is a structural schematic diagram of a radio frequency rectification circuit provided by another exemplary embodiment of the present disclosure;

[0029] Figure 4 is a structural schematic diagram of a radio frequency rectification circuit provided by another exemplary embodiment of the present disclosure;

[0030] Figure 5-1 is a schematic diagram of simulation results of a radio frequency rectifier circuit provided by an exemplary embodiment of the present disclosure;

[0031] Figure 5-2 is a schematic diagram of simulation results of a radio frequency rectifier circuit provided by another exemplary embodiment of the present disclosure;

[0032] Figure 5-3 is a schematic diagram of simulation results of a radio frequency rectifier circuit provided by another exemplary embodiment of the present disclosure;

[0033] Figure 5-4 is a schematic diagram of simulation results of a radio frequency rectifier circuit provided by another exemplary embodiment of the present disclosure;

[0034] Figure 6is a system block diagram of an electronic device provided by an exemplary embodiment of the present disclosure.

[0035] In the figure:

[0036] 1-base station; 2-antenna radiator; 3-RF rectification circuit; 4-first electrical device; 10-voltage doubling rectification unit; VD1-first diode; VD2-second diode; VD3-third diode; VD4-fourth diode; VDn-1-n-1th diode; VDn-nth diode; C1-first energy storage capacitor; C2-second energy storage capacitor; C3-third energy storage capacitor; C4-fourth energy storage capacitor; Cn-1-n-1th energy storage capacitor; Cn-nth energy storage capacitor; DC1-first bias power supply; DC2-second bias power supply; DC3-third bias power supply; DC4-fourth bias power supply; DCn-1-n-1th bias power supply; DCn-nth bias power supply; N1-first preset node; N2-second preset node; N3-third preset node; N4-fourth preset node; Nn-1-n-1th preset node; Nn-nth preset node; RF-RF signal. DETAILED DESCRIPTION

[0037] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims. It should also be understood that the term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] At present, with the development of wireless energy-carrying communication technology and the increase in base station density, more and more low-power electronic devices can be powered by RF energy carried by RF signals, for example, smart door locks, smart car keys, wearable devices, etc. can be powered by RF energy. Since low-power electronic devices can be powered by RF energy, the dependence of electronic devices on batteries is reduced, thereby reducing the size of electronic devices. Figure 1 As shown, the base station 1 sends a radio frequency signal, the antenna radiator 2 in the electronic device receives the radio frequency signal, and converts the radio frequency signal into a first direct current voltage through the radio frequency rectifier circuit 3 and outputs it to the first electrical device 4 to power the first electrical device 4. In addition to the first electrical device 4, the electronic device may also include a second electrical device, etc.

[0039] Since the amplitude of the RF signal is relatively small, and the DC voltage required by the electronic equipment is relatively high, the RF rectifier circuit used to convert the RF signal is usually a voltage doubler rectifier circuit. Figure 2 As shown, a radio frequency rectifier circuit is disclosed in the related art, including a first diode VD1, a second diode VD2, a first energy storage capacitor C1 and a second energy storage capacitor C2. One end of the first energy storage capacitor C1 is coupled to one end of the radio frequency signal RF, and the other end is coupled between the anode of the first diode VD1 and the cathode of the second diode VD2. One end of the second energy storage capacitor C2 is coupled to the cathode of the first diode VD1, and the other end is coupled to the anode of the second diode VD2 and the other end of the radio frequency signal RF. The first electrical device is coupled in parallel with the second energy storage capacitor C2. Assuming that the conduction voltage drops of the first diode VD1 and the second diode VD2 are the same, the DC voltage output by the radio frequency rectifier circuit can be determined by the following formula: V DC =2(V RF -V D ). Among them, V DC is the DC voltage output by the RF rectifier circuit, V RF is the amplitude of the RF signal, V D is the conduction voltage drop of the diode. Since the amplitude of the RF signal RF is small, it may be the same as the conduction voltage drop of the diode or even much lower than the voltage drop value, resulting in the DC voltage output by the RF rectifier circuit being low or even close to 0, or even no output from the previous stage. Since the RF rectifier circuit uses the received RF energy mainly for the conduction loss of the diode, the RF rectifier circuit has the problem of low RF energy conversion efficiency.

[0040] Based on this, the present disclosure provides a radio frequency rectification circuit, wherein at least one voltage doubler rectification unit includes a diode and a bias power supply coupled in series, and the bias power supply compensates for the conduction voltage drop of the diode, thereby reducing the radio frequency energy loss caused by the conduction voltage drop to improve the efficiency of radio frequency energy conversion. At the same time, the use of a diode will not generate a large leakage current, thereby avoiding the radio frequency energy loss caused by the leakage current of the field effect tube, and further improving the efficiency of radio frequency energy conversion. In addition, since the DC voltage output by the radio frequency rectification circuit increases after compensating for the conduction voltage drop of the diode, the number of voltage doubler rectification units is reduced, thereby reducing the complexity of the radio frequency rectification circuit structure.

[0041] like Figure 3-1 and Figure 3-2As shown, an exemplary embodiment of the present disclosure provides a radio frequency rectification circuit, including a plurality of voltage doubler rectification units 10, each voltage doubler rectification unit 10 is coupled in sequence. The radio frequency rectification circuit is used to receive a radio frequency signal RF, and boost and rectify the radio frequency signal RF through at least one voltage doubler rectification unit 10 to output a first DC voltage, and the first DC voltage is used to provide DC power to a first electrical device in an electronic device. Among them, at least one voltage doubler rectification unit 10 includes a diode and a bias power supply. The bias power supply is coupled in series with the diode to compensate for the conduction voltage drop of the diode.

[0042] In this embodiment, the RF rectification circuit includes a plurality of voltage doubling rectification units coupled in sequence, and the RF signal is boosted and rectified by the voltage doubling rectification units to output a first DC voltage, and a first electrical device in the electronic device is supplied with DC power. At least one voltage doubling rectification unit includes a diode and a bias power supply coupled in series, and the conduction voltage drop of the diode is compensated by the bias power supply to reduce the influence of the conduction voltage drop on the first DC voltage. By compensating the conduction voltage drop of the diode to increase the first DC voltage, the RF energy loss caused by the conduction voltage drop is reduced, thereby improving the efficiency of RF energy conversion.

[0043] It is understandable that the coupling method of the voltage doubler rectifier unit 10 is not limited to Figure 3-1 and Figure 3-2 , and other coupling modes that can achieve boost and rectification functions can also be used.

[0044] In one embodiment, the anode of the diode is coupled to the positive electrode of the bias power supply.

[0045] In this embodiment, by coupling the anode of the diode to the positive electrode of the bias power supply, the bias power supply can compensate for the conduction voltage drop of the diode when the diode is turned on, thereby improving the efficiency of radio frequency energy conversion.

[0046] In one embodiment, the cathode of the diode is coupled to the negative electrode of the bias power supply.

[0047] In this embodiment, by coupling the cathode of the diode to the negative electrode of the bias power supply, the bias power supply can compensate for the conduction voltage drop of the diode when the diode is turned on, thereby improving the efficiency of radio frequency energy conversion.

[0048] In one embodiment, in each voltage doubler rectifying unit 10, at least the first stage voltage doubler rectifying unit 10 includes a diode and a bias power supply coupled in series.

[0049] In this embodiment, since the first-stage voltage doubler rectifier unit includes a diode and a bias power supply coupled in series, after the bias power supply compensates for the conduction voltage drop of the diode, the first DC voltage output by the first-stage voltage doubler rectifier unit is relatively high. On the basis of the relatively high first DC voltage, the subsequent voltage doubler rectifier unit can output the expected first DC voltage to transmit the RF signal received by the RF rectifier circuit, thereby improving the efficiency of RF energy conversion. At the same time, since the first DC voltage output by the first-stage voltage doubler rectifier unit can enable the subsequent voltage doubler rectifier unit to output the expected first DC voltage, the subsequent voltage doubler rectifier unit can reduce the number of bias power supply settings, thereby reducing the complexity of the RF rectifier circuit structure.

[0050] In one embodiment, each voltage doubler rectifier unit 10 includes an energy storage capacitor, and the radio frequency signal RF is coupled to the next voltage doubler rectifier unit 10 through the energy storage capacitor of the previous voltage doubler rectifier unit 10. The energy storage capacitors in each voltage doubler rectifier unit 10 are represented by corresponding serial numbers. For example, the first energy storage capacitor in the first voltage doubler rectifier unit 10 is C1, the second energy storage capacitor in the second voltage doubler rectifier unit 10 is C2, and so on, the n-1th energy storage capacitor in the n-1th voltage doubler rectifier unit 10 is Cn-1, and the nth energy storage capacitor in the nth voltage doubler rectifier unit 10 is Cn.

[0051] In this embodiment, each voltage doubler rectifier unit includes an energy storage capacitor, which stores radio frequency energy through the energy storage capacitor and provides it to the next voltage doubler rectifier unit. Since the radio frequency signal is coupled to the next voltage doubler rectifier unit through the energy storage capacitor of the previous voltage doubler rectifier unit, the energy storage capacitor in the next voltage doubler rectifier unit can store the energy of the energy storage capacitor in the previous voltage doubler rectifier unit and the radio frequency energy, and achieve voltage boost through energy superposition to improve the efficiency of radio frequency energy conversion. At the same time, since the bias power supply can compensate for the conduction voltage drop of the diode, the charging time of the energy storage capacitor in each voltage doubler rectifier unit is reduced, thereby reducing the delay time of the radio frequency rectifier circuit outputting the first DC voltage.

[0052] In one embodiment, each voltage doubler rectifier unit 10 includes a diode and a bias power supply coupled in series, and a preset node of the previous voltage doubler rectifier unit 10 is coupled to the bias power supply or diode of the next voltage doubler rectifier unit 10, and the preset node is a node formed by coupling the energy storage capacitor of the voltage doubler rectifier unit 10 with the diode or the bias power supply. Among them, the odd-numbered and even-numbered voltage doubler rectifier units 10 are respectively coupled to different ends of the radio frequency signal RF. The diodes, bias power supplies and preset nodes in each voltage doubler rectifier unit 10 are represented by corresponding serial numbers. For example, the first diode in the first-stage voltage doubler rectifier unit 10 is VD1, the first bias power supply is DC1, and the first preset node is N1; the second diode in the second-stage voltage doubler rectifier unit 10 is VD2, the second bias power supply is DC2, and the second preset node is N2; and so on, the n-1th diode in the n-1th stage voltage doubler rectifier unit 10 is VDn-1, the n-1th bias power supply is DCn-1, and the n-1th preset node is Nn-1; the nth diode in the n-stage voltage doubler rectifier unit 10 is VDn, the n-1th bias power supply is DCn, and the n-1th preset node is Nn.

[0053] In this embodiment, since each voltage doubler rectifier unit includes a diode and a bias power supply coupled in series, the conduction voltage drop of each diode can be compensated by the bias power supply, thereby improving the efficiency of RF energy conversion. Since the conduction voltage drop of each diode can be compensated, the first DC voltage output by each level of voltage doubler rectifier unit is increased, thereby reducing the number of voltage doubler rectifier units to reduce the complexity of the RF rectifier circuit structure. By coupling the preset node of the previous level voltage doubler rectifier unit with the bias power supply or diode of the next level voltage doubler rectifier unit instead of coupling with the energy storage capacitor, the energy storage capacitor of the next level voltage doubler rectifier unit can continue to transfer the stored energy to achieve the purpose of boosting, thereby improving the efficiency of RF energy conversion.

[0054] It is understandable that the voltage doubler rectifier unit 10 including a diode and a bias power supply is not limited to the first stage or each stage, but may also be a partial voltage doubler rectifier unit 10 of the intermediate stage, which is not limited here. In addition, in addition to the diode and the bias power supply, the partial voltage doubler rectifier unit 10 may also include a field effect transistor and a bias power supply coupled in series.

[0055] In one embodiment, the energy storage capacitors of at least two voltage doubler rectifier units 10 are used to couple with the first electrical device. The energy storage capacitors of the voltage doubler rectifier unit 10 with a larger number of stages have a larger supply voltage required by the first electrical device coupled thereto.

[0056] In this embodiment, since the electronic device may include multiple first electrical devices with different power supply voltages, if they are all connected to the last-stage voltage doubler rectifier unit of the radio frequency rectifier circuit, some of the first electrical devices may work abnormally. Since the first DC voltages output by the voltage doubler rectifier units at different stages are different, different first electrical devices can be powered by at least two energy storage capacitors to reduce the number of power supplies in the electronic device, thereby reducing the complexity of the electronic device structure.

[0057] In one embodiment, the second DC voltage output by the bias power supply is the same as the forward voltage drop of the diode. The second DC voltage being the same as the forward voltage drop of the diode means that the second DC voltage is approximately the same as the forward voltage drop of the diode, and a difference within a certain voltage range is allowed, such as 0.1V, 0.2V, 0.5V, etc.

[0058] In this embodiment, by selecting a suitable bias power supply, the conduction voltage drop of the diode can be fully compensated, thereby improving the efficiency of RF energy conversion. At the same time, since the second DC voltage is the same as the conduction voltage drop of the diode, the second DC voltage is prevented from being too large, which may lead to a complex structure of the bias power supply, thereby reducing the complexity of the RF rectifier circuit structure.

[0059] For example, when the forward voltage drop of the diode is 0.7V, the second DC voltage output by the bias power supply can be 0.6V, 0.7V, 0.8V, etc. When the forward voltage drop of the diode is 0.3V, the second DC voltage output by the bias power supply can be 0.2V, 0.3V, 0.4V, etc.

[0060] In one embodiment, the diode is a Schottky diode. When each voltage doubler rectifier unit 10 in the RF rectifier circuit includes a diode, only one of the voltage doubler rectifier units 10 may be a Schottky diode, or some of the voltage doubler rectifier units 10 may be Schottky diodes, or all of the voltage doubler rectifier units 10 may be Schottky diodes.

[0061] In this embodiment, by using a Schottky diode as the diode in the voltage doubler rectifier unit, the forward voltage drop of the diode makes the second DC voltage output by the required bias power supply low, thereby reducing the complexity of the bias power supply structure and reducing the size of the electronic device.

[0062] In one embodiment, in each voltage doubler rectifying unit 10, at least the diode in the first stage voltage doubler rectifying unit 10 is a Schottky diode.

[0063] In this embodiment, since the diode in the first-stage voltage doubler rectifier unit is a Schottky diode, the second DC voltage output by the required bias power supply is low and can provide a larger first DC voltage for the subsequent voltage doubler rectifier unit, thereby improving the efficiency of RF energy conversion.

[0064] In one embodiment, the bias power supply includes a battery, which may be, for example, a button battery, a lithium battery, or the like.

[0065] In this embodiment, by using a battery as a bias power supply, the second DC voltage output by the bias power supply is stable, thereby improving the stability of the operation of the RF rectifier circuit. At the same time, since the battery is small in size and easy to replace, it is easy to handle when the battery is damaged, thereby improving the reliability of the operation of the RF rectifier circuit.

[0066] In one embodiment, the bias power supply may include not only a battery but also a DC power supply in the electronic device for providing a third DC voltage for the third electrical device, wherein the second DC voltage is the same as the third DC voltage.

[0067] In this embodiment, the DC power supply for supplying power to the third electrical device is used as a bias power supply to reuse the DC power supply in the electronic device, thereby reducing the complexity of the structure of the radio frequency rectification circuit.

[0068] For example, Figure 4As shown, taking the radio frequency rectification circuit including four voltage doubling rectification units 10 as an example, the radio frequency rectification circuit is simulated. In the radio frequency rectification circuit, the first-stage voltage doubling rectification unit 10 includes a first diode VD1, a first bias power supply DC1 and a first energy storage capacitor C1. The first end of the first energy storage capacitor C1 is coupled to the first end of the radio frequency signal RF, and the second end is coupled to the cathode of the first diode VD1 to form a first preset node N1. The anode of the first diode VD1 is coupled to the positive electrode of the first bias power supply DC1. The negative electrode of the first bias power supply DC1 is coupled to the second end of the radio frequency signal RF. The second-stage voltage doubling rectification unit 10 includes a second diode VD2, a second bias power supply DC2 and a second energy storage capacitor C2. The negative electrode of the second bias power supply DC2 is coupled to the first preset node N1, and the positive electrode is coupled to the anode of the second diode VD2. The cathode of the second diode VD2 is coupled to the first end of the second energy storage capacitor C2 to form a second preset node N2. The second end of the second energy storage capacitor C2 is coupled to the second end of the radio frequency signal RF. The third-stage voltage doubler rectifier unit 10 includes a third diode VD3, a third bias power supply DC3 and a third energy storage capacitor C3. The negative electrode of the third bias power supply DC3 is coupled to the second preset node N2, and the positive electrode is coupled to the anode of the third diode VD3. The cathode of the third diode VD3 is coupled to the first end of the third energy storage capacitor C3 to form a third preset node N3. The second end of the third energy storage capacitor C3 is coupled to the first end of the radio frequency signal RF. The fourth-stage voltage doubler rectifier unit 10 includes a fourth diode VD4, a fourth bias power supply DC4 and a fourth energy storage capacitor C4. The negative electrode of the fourth bias power supply DC4 is coupled to the third preset node N3, and the positive electrode is coupled to the anode of the fourth diode VD4. The cathode of the fourth diode VD4 is coupled to the first end of the fourth energy storage capacitor C4 to form a fourth preset node N4. The second end of the fourth energy storage capacitor C4 is coupled to the second end of the radio frequency signal RF.

[0069] The simulation conditions of the RF rectifier circuit are set as follows: the conduction voltage drop of the first diode VD1, the second diode VD2, the third diode VD3 and the fourth diode VD4 is 0.7 V, the frequency of the RF signal is 10 kHz, and the second DC voltage output by the first bias power supply DC1, the second bias power supply DC2, the third bias power supply DC3 and the fourth bias power supply DC4 is 0.6 V. Simulations are performed in three cases where the amplitude of the RF signal RF is less than the conduction voltage drop, equal to the conduction voltage drop and greater than the conduction voltage drop.

[0070] When the amplitude of the radio frequency signal RF is less than the conduction voltage drop, the amplitude of the radio frequency signal RF is set to 0.6V, and the simulation results of the first DC voltage output by the radio frequency rectifier circuit are as follows: Figure 5-1As shown. When the RF rectifier circuit does not include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is -0.4V, and the simulation value is 0V. When all voltage doubler rectifier units 10 in the RF rectifier circuit include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is 2V, and the simulation value is 2V. Where, U DC It is the first DC voltage output by the last voltage doubler rectifying unit 10 in the radio frequency rectifying circuit.

[0071] When the amplitude of the radio frequency signal RF is equal to the conduction voltage drop, the amplitude of the radio frequency signal RF is set to 0.7V, and the simulation results of the first DC voltage output by the radio frequency rectifier circuit are as follows: Figure 5-2 As shown. When the RF rectifier circuit does not include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is 0V, and the simulation value is 0V. When all voltage doubler rectifier units 10 of the RF rectifier circuit include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is 2.4V, and the simulation value is 2.4V.

[0072] When the amplitude of the radio frequency signal RF is greater than the conduction voltage drop, the amplitude of the radio frequency signal RF is set to 0.8V, and the simulation results of the first DC voltage output by the radio frequency rectifier circuit are as follows: Figure 5-3 As shown. When the RF rectifier circuit does not include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is 0.4V, and the simulation value is 0.4V. When all voltage doubler rectifier units 10 of the RF rectifier circuit include a bias power supply, the theoretical value of the first DC voltage output by the last voltage doubler rectifier unit 10 in the RF rectifier circuit is 2.8V, and the simulation value is 2.8V.

[0073] According to the above simulation results, when the RF rectifier circuit includes a bias power supply, the first DC voltage output by the RF rectifier circuit can reach the expected DC voltage, reducing the RF energy loss caused by the conduction voltage drop, thereby improving the efficiency of RF energy conversion.

[0074] When the amplitude of the RF signal RF is greater than the conduction voltage drop, the amplitude of the RF signal RF is set to 0.8V, and the simulation results of the charging time of the fourth energy storage capacitor C4 in the RF rectifier circuit are as follows: Figure 5-4 When the RF rectifier circuit does not include a bias power supply, the charging time of the fourth energy storage capacitor C4 is 0.005ms. When each level of the voltage doubler rectifier unit 10 of the RF rectifier circuit includes a bias power supply, the charging time of the fourth energy storage capacitor C4 is 0.003ms.

[0075] According to the above simulation results, when the RF rectifier circuit includes a bias power supply, since the bias power supply can compensate for the conduction voltage drop of the diode, the charging time of the energy storage capacitor in each voltage doubler rectifier unit is reduced, thereby reducing the delay time of the RF rectifier circuit outputting the first DC voltage.

[0076] An exemplary embodiment of the present disclosure further provides an antenna module, including an antenna radiator and the radio frequency rectification circuit as described above, wherein the antenna radiator is coupled to the radio frequency rectification circuit, and the antenna radiator sends a radio frequency signal to the radio frequency rectification circuit.

[0077] In one embodiment, the antenna module also includes a frequency modulation module, which is arranged between the antenna radiator and the RF rectification circuit. The frequency modulation module is used to adjust the signal received by the antenna radiator to a RF signal of a preset frequency and send it to the RF rectification circuit.

[0078] In this embodiment, the RF signal is adjusted to a preset frequency by the frequency modulation module so that the RF rectifier circuit can convert the RF signal into a desired first DC voltage, thereby improving the reliability of the operation of the RF rectifier circuit.

[0079] An exemplary embodiment of the present disclosure further provides an electronic device, including a first electrical device and the above-mentioned radio frequency rectification circuit, the radio frequency rectification circuit outputting a first DC voltage to the first electrical device. The electronic device may be, for example, a smart door lock, a smart car key, a wearable device, etc.

[0080] In this embodiment, the RF rectifier circuit including a bias power supply outputs a first DC voltage to the first electrical device for power supply, thereby reducing RF energy loss caused by conduction voltage drop, thereby improving RF energy conversion efficiency.

[0081] An exemplary embodiment of the present disclosure further provides an electronic device, which includes a second electrical device and the antenna module as described above, wherein a radio frequency rectification circuit of the antenna module outputs a first DC voltage to the second electrical device.

[0082] In this embodiment, the RF rectifier circuit including a bias power supply outputs a first DC voltage to the second power-consuming device for power supply, thereby reducing RF energy loss caused by conduction voltage drop, thereby improving RF energy conversion efficiency.

[0083] refer to Figure 6 As shown, electronic device 400 may include one or more of the following components: a processing component 402 , a memory 404 , a power component 406 , a multimedia component 408 , an audio component 410 , an input / output (I / O) interface 412 , a sensor component 414 , and a communication component 416 .

[0084] The processing component 402 generally controls the overall operation of the electronic device 400, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 402 may include one or more processors 420 to execute instructions. In addition, the processing component 402 may include one or more modules to facilitate interaction between the processing component 402 and other components. For example, the processing component 402 may include a multimedia module to facilitate interaction between the multimedia component 408 and the processing component 402.

[0085] The memory 404 is configured to store various types of data to support operations on the electronic device 400. Examples of such data include instructions for any application or method operating on the electronic device 400, contact data, phone book data, messages, pictures, videos, etc. The memory 404 can be implemented by any type of volatile or non-volatile storage terminal or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

[0086] The power supply component 406 provides power to the various components of the electronic device 400. The power supply component 406 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 400.

[0087] The multimedia component 408 includes a screen that provides an output interface between the electronic device 400 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 408 includes a front camera module and / or a rear camera module. When the electronic device 400 is in an operating mode, such as a shooting mode or a video mode, the front camera module and / or the rear camera module may receive external multimedia data. Each front camera module and the rear camera module may be a fixed optical lens system or have a focal length and optical zoom capability.

[0088] The audio component 410 is configured to output and / or input audio signals. For example, the audio component 410 includes a microphone (MIC), and when the electronic device 400 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 404 or sent via the communication component 416. In some embodiments, the audio component 410 also includes a speaker for outputting audio signals.

[0089] I / O interface 412 provides an interface between processing component 402 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

[0090] The sensor assembly 414 includes one or more sensors for providing various aspects of status assessment for the electronic device 400. For example, the sensor assembly 414 can detect the open / closed state of the electronic device 400, the relative positioning of components, such as the display and keypad of the electronic device 400, and the sensor assembly 414 can also detect the position change of the electronic device 400 or a component of the electronic device 400, the presence or absence of user contact with the electronic device 400, the orientation or acceleration / deceleration of the electronic device 400, and the temperature change of the electronic device 400. The sensor assembly 414 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 414 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 414 may also include an accelerometer, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0091] The communication component 416 is configured to facilitate wired or wireless communication between the electronic device 400 and other terminals. The electronic device 400 can access a wireless network based on a communication standard, such as WiFi, 2G, 3G, 4G, 5G, or a combination thereof. In an exemplary embodiment, the communication component 416 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 416 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

[0092] In an exemplary embodiment, the electronic device 400 may be implemented by one or more application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing terminals (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components.

[0093] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0094] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

[0095] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A radio frequency rectifier circuit, characterized in that: The RF rectification circuit comprises a plurality of voltage doubling rectification units, each of which is coupled in sequence; the RF rectification circuit is used to receive a RF signal, and boost and rectify the RF signal through at least one of the voltage doubling rectification units to output a first DC voltage; Among them, at least one of the voltage doubler rectifying units includes a diode and a bias power supply, and the bias power supply is coupled in series with the diode to compensate for the conduction voltage drop of the diode.

2. The radio frequency rectifier circuit according to claim 1, characterized in that: The anode of the diode is coupled to the positive electrode of the bias power supply; or, the cathode of the diode is coupled to the negative electrode of the bias power supply.

3. The radio frequency rectifier circuit according to claim 1, characterized in that: In each of the voltage doubler rectifying units, at least the first stage of the voltage doubler rectifying unit comprises the diode and the bias power supply coupled in series.

4. The radio frequency rectifier circuit according to claim 1, characterized in that: Each of the voltage doubler rectifier units includes an energy storage capacitor, and the radio frequency signal is coupled to the voltage doubler rectifier unit of the next stage through the energy storage capacitor of the voltage doubler rectifier unit of the previous stage.

5. The radio frequency rectifier circuit according to claim 4, characterized in that: Each of the voltage doubler rectifier units comprises the diode and the bias power supply coupled in series, the preset node of the voltage doubler rectifier unit of the previous stage is coupled with the bias power supply or the diode of the voltage doubler rectifier unit of the next stage, and the preset node is a node formed by coupling the energy storage capacitor of the voltage doubler rectifier unit with the diode or the bias power supply; The odd-numbered and even-numbered voltage doubler rectifying units are respectively coupled to different ends of the radio frequency signal.

6. The radio frequency rectifier circuit according to claim 4, characterized in that: The energy storage capacitors of at least two of the voltage doubler rectifying units are used to couple with a first electrical device; The larger the number of stages of the voltage doubler rectifying unit, the larger the supply voltage required by the first electrical device coupled to the energy storage capacitor.

7. The radio frequency rectifier circuit according to claim 1, characterized in that: The second DC voltage output by the bias power supply is equal to the conduction voltage drop of the diode.

8. The radio frequency rectifier circuit according to any one of claims 1 to 7, characterized in that: The diode is a Schottky diode; and / or the bias power supply includes a battery.

9. An antenna module, characterized in that: The antenna module includes an antenna radiator and a radio frequency rectification circuit as described in any one of claims 1 to 8, the antenna radiator is coupled to the radio frequency rectification circuit, and the antenna radiator sends the radio frequency signal to the radio frequency rectification circuit.

10. The antenna module according to claim 9, characterized in that: The antenna module also includes a frequency modulation module, which is arranged between the antenna radiator and the radio frequency rectification circuit. The frequency modulation module is used to adjust the signal received by the antenna radiator to the radio frequency signal of a preset frequency and send it to the radio frequency rectification circuit.

11. An electronic device, characterized in that: The electronic device includes a first electrical device and the radio frequency rectifier circuit according to any one of claims 1 to 8, and the radio frequency rectifier circuit outputs the first DC voltage to the first electrical device.

12. An electronic device, characterized in that: The electronic device includes a second electrical device and the antenna module according to claim 9 or 10, and the radio frequency rectification circuit of the antenna module outputs the first DC voltage to the second electrical device.

Images