CN117615437A - Non-contact connector for radio frequency signals and power control method - Google Patents

Non-contact connector for radio frequency signals and power control method Download PDF

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Publication number
CN117615437A
CN117615437A CN202311630896.7A CN202311630896A CN117615437A CN 117615437 A CN117615437 A CN 117615437A CN 202311630896 A CN202311630896 A CN 202311630896A CN 117615437 A CN117615437 A CN 117615437A
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CN
China
Prior art keywords
power
signal
output
amplifier
radio frequency
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CN202311630896.7A
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Chinese (zh)
Inventor
袁毅
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Shanghai Archiwave Electronic Technology Co ltd
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Shanghai Archiwave Electronic Technology Co ltd
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Priority to CN202311630896.7A priority Critical patent/CN117615437A/en
Publication of CN117615437A publication Critical patent/CN117615437A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/52—TPC using AGC [Automatic Gain Control] circuits or amplifiers

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Transmitters (AREA)

Abstract

The application provides a non-contact connector and a power control method for radio frequency signals, wherein the non-contact connector comprises a transmitting circuit, a receiving circuit, a comparison amplifier and a power controller, wherein the transmitting circuit comprises a power amplifier configured to transmit radio frequency signals after passing through the power amplifier; the comparison amplifier is connected with the receiving circuit and is configured to compare the output voltage of the receiving circuit with a reference voltage and output a comparison result; the power controller is configured to: outputting a first control signal to reduce the output power of the power amplifier when the output voltage is greater than the reference voltage; and outputting a second control signal to raise the output power of the power amplifier when the output voltage is smaller than the reference voltage.

Description

Non-contact connector for radio frequency signals and power control method
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a contactless connector for radio frequency signals and a power control method.
Background
The contactless connector may utilize a wireless radio frequency link instead of metal contacts in a conventional connector. Wireless connection can be achieved when the two end devices of the connector are close together for transmitting power or data.
In the related art, for a carrier band of a frequency range of 57-64GHz, it is applicable to a case where the distance between devices at both ends in a contactless connector is a short pitch. The distance between the two devices may vary or the two devices may rotate relative to each other, but the transmit power of the transmitter in the connector is fixed and is not adjusted according to the distance between the two devices of the connector. This makes the design of the devices involved in the receiving circuit difficult and can cause signal leakage to contaminate the electromagnetic environment, and the fixed power consumption can waste energy.
Disclosure of Invention
The application provides a non-contact connector for radio frequency signals and a power control method, which can adjust transmitting power to adapt to distance change between two devices.
A first aspect of the present application discloses a contactless connector for a radio frequency signal, a transmitting circuit, a receiving circuit, a comparison amplifier and a power controller, wherein the transmitting circuit comprises a power amplifier configured to transmit a radio frequency signal after passing through the power amplifier; the comparison amplifier is connected with the receiving circuit and is configured to compare the output voltage of the receiving circuit with a reference voltage; the power controller is configured to: outputting a first control signal to reduce the output power of the power amplifier when the output voltage is greater than the reference voltage; and outputting a second control signal to raise the output power of the power amplifier when the output voltage is smaller than the reference voltage.
In a possible implementation of the first aspect, the receiving circuit includes: the receiving circuit includes: a low noise amplifier, a demodulator and a baseband limiting amplifier, and the comparison amplifier is connected with the output end of one of the low noise amplifier, the demodulator and the baseband limiting amplifier.
In a possible implementation of the first aspect, the method further comprises coupling an output voltage on the receiving circuit to the comparison amplifier.
In a possible implementation of the first aspect, the power amplifier has a bias circuit; and the power controller adjusts the output power of the power amplifier by controlling the bias circuit.
In a possible implementation of the first aspect, the power amplifier includes: at least two sub-power amplifiers, wherein the output power of each sub-power amplifier is different from each other; and the at least two sub-power amplifiers are connected to a switch; the switch is configured to adjust an operating state of a corresponding one of the at least two sub-power amplifiers by controlling a conductive state by the power controller to adjust an output power of the power amplifier.
In a possible implementation of the first aspect, the method further includes a timer, where the timer is used to control the first control signal and the second control signal to be output after waiting for a random time.
In a possible implementation of the first aspect, the comparison result output by the comparison amplifier includes a difference magnitude signal between the output voltage and the reference voltage; the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal comprises a power value signal which is required to be adjusted.
In a possible implementation of the first aspect, the comparison result output by the comparison amplifier does not include a difference magnitude signal between the output voltage and the reference voltage; the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal comprises a power value signal with a preset step.
In a possible implementation of the first aspect, the bias circuit includes: the device comprises a signal input end, a signal control end and a signal output end; the signal control end is adapted to the power controller; the signal input end is used for inputting the input voltage of the bias circuit; the signal output end is adapted to the power amplifier, and the power controller controls the signal of the signal output end by adjusting the signal of the signal control end, so that the output power of the power amplifier is controlled.
In a possible implementation of the first aspect, the frequency range of the radio frequency signal is 57GHz-64GHz.
In one possible implementation manner of the first aspect, a range of a radio frequency signal of the contactless connector is less than or equal to 5cm and greater than or equal to 0.5cm.
A second aspect of the present application discloses a power control method for a contactless connector for radio frequency signals, the connector comprising a transmitting circuit, a receiving circuit, the transmitting circuit comprising a power amplifier configured to transmit radio frequency signals after passing through the power amplifier; the method is characterized in that after the receiving circuit receives the radio frequency signal, the output voltage of the receiving circuit is compared with the reference voltage, and a comparison result is output; reducing an output power reduction of the power amplifier by a first control signal when the output voltage is greater than the reference voltage; and when the output voltage is smaller than the reference voltage, increasing the output power of the power amplifier through a second control signal.
In a possible implementation of the second aspect, the output power is adjusted after the first control signal and the second control signal wait for a random time.
In a possible implementation of the second aspect, the comparison result does not include a difference magnitude signal between the output voltage and the reference voltage, and the first control signal and the second control signal include adjustment steps for adjusting the output power; or the comparison result comprises a difference value signal of the output voltage and the reference voltage, and the first control signal and the second control signal comprise adjustment power value signals of the output power to be adjusted.
In a possible implementation of the second aspect, the method further includes repeating the step of adjusting the output power until the output voltage is equal to the reference voltage.
After receiving a signal sent by opposite terminal equipment, the comparison amplifier compares the output voltage of the received signal with a reference voltage and sends a comparison result to the power controller. The power controller adjusts the output of the power amplifier in the transmitting circuit in the first connector according to the comparison result. Thus, when the distance between the first connector and the second connector is relatively short, the comparison amplifier compares the output voltage of the received signal to be larger than the reference voltage, and the power controller reduces the output power of the transmitting circuit according to the comparison result; when the distance between the first connector and the second connector is longer, the comparison amplifier compares that the output voltage of the received signal is smaller than the reference voltage, and the power controller increases the output power of the transmitting circuit according to the comparison result. The connector of the local terminal adjusts the transmitting power of the local terminal through the received signal of the opposite terminal, and the receiving circuit of the opposite terminal adjusts the transmitting power of the opposite terminal based on the received adjusted transmitting power so as to adapt to the distance change between the two connectors, and meanwhile, the power consumption of the chip is saved. The transmitting power between the connectors at two ends can adapt to the change of the distance between the two connectors, so that the transmission loss between the two connectors is reduced, and the linearity requirements on devices such as an amplifier and a demodulator in a receiving circuit are reduced, thereby reducing the cost.
Drawings
FIG. 1 is a scene graph of an embodiment of the present application;
fig. 2 is a circuit block diagram of a connector 200 for radio frequency signals according to one embodiment of the present application;
FIG. 3 is a flow chart of a power control method 300 according to one embodiment of the present application;
fig. 4 is a timing diagram of power adjustment according to one embodiment of the present application.
Detailed Description
The present application is further described below with reference to specific embodiments and figures. It is to be understood that the illustrative embodiments of the present disclosure, including but not limited to contactless connectors for radio frequency signals and power control methods, are described herein in terms of specific embodiments only for purposes of explaining the present application and not limiting the same. Furthermore, for ease of description, only some, but not all, of the structures or processes associated with the present application are shown in the drawings.
For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.
Connectors, also known as connectors, plugs and sockets, use metallic contacts as a medium to transmit power or signals. Common connectors are, for example, charging connectors or data connectors, such as new energy automobile charging connectors, vehicle ethernet connectors, USB data for notebook and cell phones, charging two-in-one connectors, etc.
FIG. 1 illustrates a scene graph of an embodiment of the present application. The device in fig. 1 is a contactless connector system 100 comprising two devices (i.e. contactless connectors) 110 and 120 connected by a contactless connection. One of the devices 110 and 120 is a home device and the other is a peer device.
The contactless connector system 100 may utilize a wireless radio frequency link instead of metal contacts in a conventional connector. The connection is made when the two end devices 110, 120 of the connector are brought together. For the contactless connector, since no forced plugging is required, the safety of the device connector can be improved. In addition, the waterproof and dustproof performance of the non-contact connector has the standard specification which is universal worldwide, and can be conveniently provided for various devices. The convenience of contactless connectors has thus made them popular in various fields (wireless charging and wireless data connection fields).
Typically, the frequency range of 57-64GHz is allowed to be used in very low transmission power and short range and unlicensed application scenarios. The distance between the contactless connectors at both ends is a short pitch, varying from 0.5cm to 5cm. The change of the wireless space transmission loss with the distance between the two devices can be calculated according to the formula (1).
Loss=32.45+20 lg 10 F(MHz)+20lg 10 D(Km)(1)
Wherein F is the frequency of the transmission signal between the two end devices, the unit is MHz, D is the distance between the two end devices, and the unit is Km.
Table 1 shows the transmission loss at each distance calculated according to formula (1).
Table 1 transmission loss values at different connector distances
According to table 1, when the distance between the two end devices of the connector varies from near (0.5 cm) to far (5 cm), the loss increases with increasing distance, i.e. from 21.98dB to 41.98 dB. Therefore, when the local device transmits a signal, the path attenuation of the received signal of the opposite device varies between 21.98dB and 41.98dB according to the distance between the local device and the opposite device, so that the dynamic range required for devices such as a low noise amplifier, a demodulator and the like in the receiving circuit is large, and reaches the range of 41.98-21.98=20 dB. The design difficulty is therefore greater for the low noise amplifier and demodulator involved in the receiving circuit and the static power consumption is higher.
Further, in the related art, the transmission power of the transmission circuit in the connector is fixed and is not adjusted according to the distance change between the devices at both ends of the connector. For example, when the devices at both ends are very close, the transmitting circuit transmits a fixed power only in accordance with the set power value, and does not reduce the transmitting power of the transmitting circuit in the case where the distance becomes small. At this time, transmission of a higher transmission power than the actual demand may cause signal leakage to pollute the electromagnetic environment, and the fixed power consumption may waste energy.
To solve the above-described problems, an embodiment of the present application shows a circuit configuration diagram of a contactless connector 200 for radio frequency signals, see fig. 2.
The connector 200 of fig. 2 can transmit and receive signals to and from a connector (not shown) of an opposite terminal for contactless communication. The connector 200 includes: transmit circuitry 210, receive circuitry 220, compare amplifier 230, and power controller 240.
The transmit circuit 210 includes a Power Amplifier (PA) 211, and the transmit circuit 210 is configured to transmit the radio frequency signal via the PA 211.
Specifically, the transmitting circuit 210 modulates the input signal 212 by using the oscillator 213, and then amplifies the modulated high-frequency signal by using the power amplifier 211 to meet the requirement of transmitting power, and then radiates the high-frequency signal to the space through the antenna port, so as to ensure that the receiving circuit of the opposite connector in a certain area can receive a stable signal level of the signal. The power amplifier 211 is an important part of the transmitting circuit 210, and is usually located at the final stage of the transmitting circuit for power amplification.
The receiving circuit 220 is configured to receive a radio frequency signal from an antenna port, and demodulate the received radio frequency signal to obtain an output signal. In some examples, the receive circuit 220 includes a Low Noise Amplifier (LNA) 221, a demodulator 222, and a baseband limiting amplifier (BBA) 224. The baseband limiting amplifier 224 may stabilize the output power of the receiving circuit 220. The output voltage of the baseband limiting amplifier 224 may be filtered out jitter by a delay circuit before being input to the comparison amplifier.
In some examples, the receive circuit 220 may also include a single ended-differential converter (SE-Diff) 223. The single-ended-to-differential converter 223 is configured to reduce interference of the power amplifier 211 in the transmit circuit 210. The single-ended-to-differential converter 223 may convert single-ended signals in the signal chain of the receiving circuit 220 into differential signals. Because the differential signal uses larger signals under a group of specific power supply voltages, the suppression capability of common mode noise is improved, and the second harmonic distortion is reduced, so that a higher signal-to-noise ratio is realized.
The comparison amplifier 230 is connected to the receiving circuit 220, and the comparison amplifier 230 is configured to compare an output voltage of the receiving circuit 220 with a reference voltage and output a comparison result. In some examples, the comparison amplifier 230 is connected to an output of the receiving circuit 220 and is configured to compare an output voltage of the receiving circuit 220 with a reference voltage and output a comparison result to the power controller 240. In some examples, the comparison amplifier 230 may be connected to an output of one of the low noise amplifier 221, the demodulator 222, and the baseband limiting amplifier 224.
In some embodiments, the connector 200 may further include a coupler for coupling signals between the receiving circuit 220 and the comparison amplifier 230, i.e., the coupler may be configured to couple the output voltage of the receiving circuit 220 to the comparison amplifier 230, where the output voltage of the receiving circuit 220 includes the output voltage of any device node on the receiving circuit, such as the output voltage of the output terminal of the BBA224, the output voltage of the output terminal of the demodulator 222, the output voltage of the output terminal of the LNA221, and so on. In some examples, the coupler is a directional coupler, and a metal wire may be disposed in the directional coupler, and the ground state of the metal wire may be adjusted by a switch to achieve adjustment of the operating bandwidth of the coupler.
The power controller 240 is configured to adjust the output power of the transmitting circuit 210 based on the comparison result of the comparison amplifier 230. Specifically, when the output voltage is greater than the reference voltage, the first control signal is outputted to reduce the output power of the power amplifier 211; when the output voltage is smaller than the reference voltage, the second control signal is outputted to raise the output power of the power amplifier 211.
In some embodiments, the power amplifier 211 has a bias circuit, and the output power of the power amplifier 211 is adjusted by controlling the bias circuit. In some examples, the bias circuit adjusts the average output power of the power amplifier 211. The comparison amplifier 230 compares the output voltage V of the receiving circuit 220 out And reference voltage V cal . When outputting voltage V out Greater than reference voltage V cal When this is the case, the result is sent to the power controller 240. The power controller 240 adjusts the bias of the power amplifier 211 in the transmit circuit 210 such that the transmit power of the power amplifier 211 is reduced. When outputting voltage V out Less than the reference voltage V cal When this is the case, the result is sent to the power controller 240. The power controller 240 adjusts the bias of the power amplifier 211 in the transmit circuit 210 such that the transmit power of the power amplifier 211 increases. Modulation of the bias of the power amplifier 211 may be performed multiple times until the output voltage V out Is equal to or close to the reference voltage V cal 。
The bias circuit of the power amplifier 211 may be of conventional construction. In some examples of the present application, the bias circuit includes: the device comprises a signal input end, a signal control end and a signal output end; the signal control end is adapted to the power controller; the signal input end is used for inputting the input voltage of the bias circuit; the signal output end is adapted to the power amplifier, and the power controller controls the signal of the signal output end by adjusting the signal of the signal control end, so that the output power of the power amplifier is controlled.
In some embodiments, output power adjustment of the power amplifier may be achieved by operating state settings of the multi-stage sub-power amplifier. For example, the power amplifier 211 may include at least two sub-power amplifiers, wherein the output power of each sub-power amplifier is different from each other; and at least two sub-power amplifiers are connected to the switch; and the switch is configured to adjust the operating state of a corresponding sub-power amplifier of the at least two sub-power amplifiers by controlling the on state through the power controller to adjust the output power of the power amplifier.
In this application, the reference voltage is a calibration voltage value at the time of wireless link initialization when the distance between the connectors at both ends is moderate. The specific value of the reference voltage can be obtained in a pre-factory test stage. The distance here may be any value set between 0.5 and 5cm, for example 0.25cm. In some examples, reference voltage V cal May be defined as the voltage value of the receiving circuit when the system performance (in this application, the receiving circuit) satisfies the set value. In some examples, system performance may refer to noise, signal-to-noise ratio, or system power consumption. The reference voltage may be set according to a system performance optimization (FOM), for example, when noise is minimum, or signal-to-noise ratio is maximum, or system power consumption is minimum. In some examples, the reference voltage V may be set according to the value of the connector data side low voltage differential peak-to-peak output, such as 0.2V cal . When the output voltage is greater than 0.2V, the transmission power of the transmission circuit needs to be reduced; when the output voltage is less than 0.2V, it is indicated that the transmission power of the transmission circuit needs to be increased.
In some embodiments, the comparison result output by the comparison amplifier comprises a difference magnitude signal of the output voltage and the reference voltage; the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal comprises a power value signal which is required to be adjusted. When the difference between the output voltage and the reference voltage and the corresponding relation between the difference and the power value to be adjusted of the power amplifier are determined, the power controller sends a pulse signal to the power amplifier, and the power amplifier is informed to directly adjust according to the corresponding power value.
In some embodiments, the comparison result output by the comparison amplifier does not include a difference signal between the output voltage and the reference voltage, and the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal includes a power value signal of a predetermined step. When the difference between the output voltage and the reference voltage is somewhat uncertain, the power value of the power amplifier can be adjusted in a stepwise manner.
In some embodiments, the frequency range of the radio frequency signals transmitted and received by connector 200 is 57GHz-64GHz.
In one example, the connector 200 at the home end and the connector at the opposite end perform full duplex communication. The internal circuit structure of the connector at the opposite end is identical to that of the connector 200. The transmitting circuits of the connector 200 and the opposite connector respectively transmit signals to the receiving circuits of the opposite connector, and the receiving circuits of the connector 200 and the opposite connector respectively receive signals from the opposite connector.
In some examples, the range of the receiving and transmitting distance of the radio frequency signal of the contactless connector is less than or equal to 5cm and greater than or equal to 0.5cm. It is understood that the transceiving distance herein may refer to the distance between antenna ports in different connectors. When the distance between the connector 200 and the connector at the opposite end is relatively close, for example, 0.5cm, the comparison amplifier 230 in the connector 200 receives the output voltage V from the receiving circuit 220 out . The comparison amplifier 230 outputs the voltage V out And reference voltage V cal Comparing to obtain output voltage V out Higher than the reference voltage V cal The comparison amplifier 230 sends a signal (e.g., "1") to the power controller 240 informing the power controller 240 of the comparison result. After receiving the signal, the power controller 240 sends a predetermined reduced power analog pulse signal to the transmit circuit 210 to adjust the power amplifier in the transmit circuit 210 to reduce the average output of the power amplifierPower.
When the distance between the connector 200 and the connector at the opposite end is relatively long, for example, 5cm, the comparison amplifier 230 in the connector 200 receives the output voltage V from the receiving circuit 220 out . The comparison amplifier 230 outputs the voltage V out And reference voltage V cal Comparing to obtain output voltage V out Lower than the reference voltage V cal The comparison amplifier 230 sends a signal (e.g., -1 ") to the power controller 240 informing the power controller 240 of the comparison. After receiving the signal, the power controller 240 sends a prescribed reduced-power analog pulse signal to the transmit circuit 210 to adjust the power amplifier in the transmit circuit 210 to increase the average output power of the power amplifier.
Thus, the receiving circuit of the connector 200, after receiving the signal transmitted from the counterpart device, the comparison amplifier compares the output voltage of the received signal with the reference voltage and transmits the comparison result to the power controller. The power controller adjusts the output of the power amplifier in the transmit circuit in the first connector 200 according to the comparison result. Thus, when the distance between the first connector and the second connector is close, the comparison amplifier compares that the output voltage of the received signal is larger than the reference voltage, and the power controller adjusts the bias of the transmitting circuit according to the comparison result so as to reduce the average output power; when the distance between the first connector and the second connector is longer, the comparison amplifier compares that the output voltage of the received signal is smaller than the reference voltage, and the power controller adjusts the bias of the transmitting circuit according to the comparison result so as to improve the average output power. The connector 200 at the home terminal and the connector at the opposite terminal transmit power control instructions to the opposite terminal through the modulation mode of the transmitting power at the home terminal so as to adapt to the distance change between the two connectors, and meanwhile, the power consumption of the chip is saved. The linearity requirements for the devices such as amplifiers, demodulators and the like in the receiving circuit are reduced, so that the cost is reduced.
In some embodiments, a timer is also included in the connector 200. The timer is configured to control the control signal of the power controller 240, for example, the first control signal and the second control signal described above, to be output after waiting for a random time.
Fig. 3 shows a flow diagram of a method 300 of power control for a contactless connector for radio frequency signals according to one embodiment of the present application. The connector includes a transmit circuit including a power amplifier configured to transmit a radio frequency signal through the power amplifier, and a receive circuit. The method 300 includes the following steps.
In S310, a first radio frequency signal is transmitted.
The transmitting circuit of the first connector transmits a radio frequency signal (first radio frequency signal) to the receiving circuit of the second connector. In some examples, the first connector and the second connector are in full duplex communication, so that the transmitting circuits of the first connector and the second connector each transmit radio frequency signals to the receiving circuits of the opposite end, and the receiving circuits of the first connector and the second connector each receive radio frequency signals transmitted from the transmitting circuits of the opposite end.
In S320, after the receiving circuit receives the radio frequency signal, the output voltage of the receiving circuit is compared with the reference voltage.
A comparison amplifier in the first connector compares the output voltage of the receiving circuit in the first connector with a reference voltage.
In S330, the output power of the power amplifier is adjusted based on the comparison result.
The power controller sends out a control signal according to the comparison result to adjust the output power of the power amplifier of the transmitting circuit. In some examples, the output power is an average output power. When the comparison result is that the output voltage is larger than the reference voltage, the power controller outputs a first control signal, so that the output power of a power amplifier in the transmitting circuit is reduced, and a corresponding second radio frequency signal is obtained.
When the comparison result is that the output voltage is smaller than the reference voltage, the power controller outputs a second control signal, so that the output power of a power amplifier in the transmitting circuit is increased, and a corresponding second radio frequency signal is obtained.
In some embodiments, the output power may be adjusted after the first control signal and the second control signal wait for a random time based on the comparison result, so as to avoid collision. In some embodiments, the output power of the power amplifier may be adjusted in a stepwise manner.
In S340, a second radio frequency signal is transmitted.
The first connector transmits the modulated second radio frequency signal to the second connector.
In some embodiments, the comparison result does not include a difference signal between the output voltage and the reference voltage, and the first control signal and the second control signal include adjustment steps for adjusting the output power; or the comparison result comprises a difference value signal of the output voltage and the reference voltage, and the first control signal and the second control signal comprise adjusting power value signals of the output power to be adjusted.
In some embodiments, steps S310-S340 may be cycled. I.e. the step of adjusting the output power is repeated until the output voltage is equal to the reference voltage. To better illustrate this, fig. 4 shows a timing diagram for adjusting power of one embodiment of the present application.
In S401, the second power controller in the second connector receives a message that the average level is exceeded.
A first Power Amplifier (PA) in a transmit circuit of the first connector transmits a first radio frequency signal to a receive circuit of the second connector, which receives the first radio frequency signal. The comparison amplifier in the second connector compares the output voltage of the receiving circuit of the second connector with the reference voltage to obtain a comparison result that the output voltage is higher than the reference voltage, namely, the average level received by the receiving circuit in the second connector exceeds a preset range. The comparison result is sent to the power controller (second power controller) in the second connector, so that the power controller in the second connector receives a message that the reception average level is over-limit.
In S402, a first power controller in a first connector receives a message that the average level is exceeded.
Because of the wireless duplex communication between the first connector and the second connector, the receiving circuit in the first connector receives the third radio frequency signal sent by the second power amplifier in the transmitting circuit of the second connector. The comparison amplifier in the first connector compares the output voltage of the receiving circuit of the first connector with the reference voltage to obtain a result that the output voltage is higher than the reference voltage, namely, the average level received by the receiving circuit in the first connector exceeds a preset range. The comparison result is sent to the power controller (first power controller) in the first connector, and thus the first power controller in the first connector also receives a message that the average level is exceeded.
In S403, the first power controller transmits a control signal to the first power amplifier.
The first power controller, upon receiving a signal representing the comparison result, sends a control signal to the first power amplifier for adjusting the transmission level or average output power of the first transmission circuit.
In some embodiments, the comparison amplifier sends a signal "1" to the power controller when the comparison results in the output voltage being greater than the reference voltage, e.g., the distance between the first connector and the second connector is relatively close. The first power controller sends a first control signal, i.e., an agreed reduced power analog pulse signal, to the first power amplifier. The agreed reduced power analog pulse signal may be set by itself, for example, encoding-1+0-1+0+1.
In some embodiments, the comparison amplifier sends a signal "-1" to the power controller when the comparison result is that the output voltage is less than the reference voltage, e.g., the distance between the first connector and the second connector is greater. The first power controller sends a second control signal, i.e., a power-up-agreed analog pulse signal, to the first power amplifier. The agreed power up analog pulse signal may be set by itself, e.g., encoding +1+0+1+0-1. It will be appreciated by those skilled in the art that the reduced/increased power analog pulse signal may be freely set, and that only different codes need be used to distinguish between the two signals.
In some embodiments, after S402, a random time T may be waited for 0 Thereafter, S403 is performed to avoid collision. Random time T 0 Can be set by itself, for example, at any time in the range of 0-10 s.
In S404, the second power controller transmits a control signal to the second power amplifier.
The second power controller transmits a control signal to the second power amplifier to adjust a transmission level or an average output power of the second power amplifier after receiving a signal representing a comparison result. Those skilled in the art will understand that the transmission manner of the control signal in S404 may be similar to that in S403, and will not be described herein.
In S405, the second connector determines an instruction of the first connector.
The first power controller transmits a signal with the identification of the first power controller to the second power controller at the same time when transmitting a control signal; when the second power controller receives the control signal with the identification, the second power controller feeds back a confirmation signal to the first power controller, namely ACK (acknowledge), if the confirmation is correct, the first power controller can normally adjust the output power of the first power amplifier, and if the confirmation is correct, the first power controller stops adjusting the output power of the first power amplifier. In this way, it is possible to avoid interference caused by the control signal of the contactless connector in one system being received by the contactless connector in the other system in the two contactless systems that are relatively close to each other.
At S406, the first connector determines an instruction of the second connector. Similar to S405, the first power controller feeds back an acknowledgement signal to the second power controller.
At S407, the second connector sends a feedback signal to the first connector and adjusts the output of the second power amplifier.
The second power amplifier in the second connector transmits an electrical frequency modulated message as a feedback signal to the first connector after determining that an instruction from the first connector is received. The feedback signal may be a signal corresponding to the analog pulse signal in S403 or S404, or may be provided separately. The output of the second power amplifier is additionally regulated. At S408, the first connector receives the feedback signal and adjusts the output of the first power amplifier.
The first connector receives the feedback signal in S407 and adjusts the output of the first power amplifier. The output adjustment in S0407-408 can be done in a synchronized manner, i.e. the first transmitting circuit and the second transmitting circuit increase or decrease the transmission level/power synchronously.
In some examples, when it is desired to adjust the output of the power amplifier, the output of the amplifier may be adjusted in a stepwise manner. The step size can be set according to the requirement. The emission level may be increased or decreased by a size of 6dB, for example.
In some embodiments, in S407 and S408, a timer may also be utilized. For example, the time T may be set by a timer circuit 1 Time T 1 Only the process of adjusting the amplifier output is processed to avoid other disturbances and reduce fluctuations. The timer is turned off when the output adjustment at this stage is completed. It will be appreciated that time T 1 And may be set at any time.
In some embodiments, S401-S408 may be cycled. For example, the transmit level may be increased or decreased by a magnitude of 6dB in the first cycle, and may also be increased or decreased by a magnitude of 6dB in the second cycle until the output voltage of the receiving circuit in the connector is level with the reference voltage. At this time, the transmission power at both ends of the first connector and the second connector is adapted to the change in the distance therebetween.
The foregoing describes embodiments of the present application in terms of specific embodiments, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. While the description of the present application will be presented in conjunction with the preferred embodiments, it is not intended that the invention be limited to this embodiment. The following description contains many specific details in order to provide a thorough understanding of the present application. The present application may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the focus of the application. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
Moreover, various operations will be described as multiple discrete operations in a manner that is most helpful in understanding the illustrative embodiments; however, the order of description should not be construed as to imply that these operations are necessarily order dependent. In particular, these operations need not be performed in the order of presentation.
The terms "comprising," "having," and "including" are synonymous, unless the context dictates otherwise. The phrase "A/B" means "A or B". The phrase "a and/or B" means "(a and B) or (a or B)".
In some cases, the disclosed embodiments may be implemented in hardware, firmware, software, or any combination thereof. The disclosed embodiments may also be implemented as instructions carried by or stored on one or more transitory or non-transitory machine-readable (e.g., computer-readable) storage media, which may be read and executed by one or more processors. For example, the instructions may be distributed over a network or through other means of computer readable media. Thus, a machine-readable medium may include any mechanism for storing or transmitting information in a form readable by a machine (e.g., a computer), but is not limited to, a floppy disk, an optical disk, a compact disk, a read-only memory (CD-ROM), a magneto-optical disk, a read-only memory (ROM), a Random Access Memory (RAM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic or optical card, a flash memory, or a tangible machine-readable memory for transmitting information over the internet via electrical, optical, acoustical or other form of propagated signals (e.g., carrier waves, infrared signals, digital signals, etc.). Thus, a machine-readable medium includes any type of machine-readable medium suitable for storing or transmitting electronic instructions or information in a form readable by a machine (e.g., a computer).
In the drawings, some structural or methodological features are shown in a particular arrangement and/or order. However, it should be understood that such a particular arrangement and/or ordering may not be required. In some embodiments, these features may be arranged in a different manner and/or order than shown in the illustrative figures. Additionally, the inclusion of structural or methodological features in a particular figure is not meant to imply that such features are required in all embodiments, and in some embodiments, may not be included or may be combined with other features.
It will be understood that, although the terms "first," "second," etc. may be used herein to describe various elements or data, these elements or data should not be limited by these terms. These terms are only used to distinguish one feature from another. For example, a first feature may be referred to as a second feature, and similarly a second feature may be referred to as a first feature, without departing from the scope of the example embodiments.
It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention.

Claims (15)

1. A contactless connector for radio frequency signals, comprising:
a transmitting circuit, a receiving circuit, a comparison amplifier and a power controller, wherein,
the transmitting circuit includes a power amplifier configured to transmit a radio frequency signal through the power amplifier;
the comparison amplifier is connected with the receiving circuit and is configured to compare the output voltage of the receiving circuit with a reference voltage;
the power controller is configured to: outputting a first control signal to reduce the output power of the power amplifier when the output voltage is greater than the reference voltage; and outputting a second control signal to raise the output power of the power amplifier when the output voltage is smaller than the reference voltage.
2. The contactless connector for radio frequency signals according to claim 1, wherein the receiving circuit comprises: a low noise amplifier, a demodulator and a baseband limiting amplifier, and the comparison amplifier is connected with the output end of one of the low noise amplifier, the demodulator and the baseband limiting amplifier.
3. The contactless connector for radio frequency signals of claim 1, further comprising a coupler configured to couple an output voltage on the receiving circuit out to the comparison amplifier.
4. The contactless connector for radio frequency signals of claim 1, wherein the power amplifier has a bias circuit; the power controller adjusts the output power of the power amplifier by controlling the bias circuit.
5. The contactless connector for radio frequency signals of claim 1, wherein the power amplifier comprises: at least two sub-power amplifiers, wherein the output power of each sub-power amplifier is different from each other; and is also provided with
The at least two sub-power amplifiers are connected with a switch; the switch is configured to adjust an operating state of a corresponding one of the at least two sub-power amplifiers by controlling a conductive state by the power controller to adjust an output power of the power amplifier.
6. The contactless connector for radio frequency signals according to claim 1, further comprising a timer for controlling the first control signal, the second control signal to be outputted after waiting a random time.
7. The contactless connector for radio frequency signals according to claim 1, wherein the comparison result output by the comparison amplifier includes a difference magnitude signal of the output voltage and the reference voltage;
the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal comprises a power value signal which is required to be adjusted.
8. The contactless connector for a radio frequency signal according to claim 1, wherein the comparison result output by the comparison amplifier does not include a difference magnitude signal of the output voltage and the reference voltage;
the first control signal or the second control signal is an analog pulse signal, and the analog pulse signal comprises a power value signal with a preset step.
9. The contactless connector for radio frequency signals of claim 4, wherein the biasing circuit comprises: the device comprises a signal input end, a signal control end and a signal output end;
the signal control end is adapted to the power controller;
the signal input end is used for inputting the input voltage of the bias circuit;
the signal output end is adapted to the power amplifier, and the power controller controls the signal of the signal output end by adjusting the signal of the signal control end, so that the output power of the power amplifier is controlled.
10. The contactless connector for radio frequency signals according to claim 1, wherein the frequency range of the radio frequency signals is 57GHz-64GHz.
11. The contactless connector for radio frequency signals according to claim 1, wherein a range of a transmission/reception distance of radio frequency signals of the contactless connector is 5cm or less and 0.5cm or more.
12. A power control method for a contactless connector for radio frequency signals, the connector comprising a transmitting circuit, a receiving circuit, the transmitting circuit comprising a power amplifier configured to transmit radio frequency signals after passing through the power amplifier;
characterized in that the method comprises the steps of,
after the receiving circuit receives the radio frequency signal, comparing the output voltage of the receiving circuit with a reference voltage, and outputting a comparison result;
reducing an output power reduction of the power amplifier by a first control signal when the output voltage is greater than the reference voltage; and when the output voltage is smaller than the reference voltage, increasing the output power of the power amplifier through a second control signal.
13. The method of claim 12, wherein the first control signal and the second control signal are caused to wait for a random time before adjusting the output power.
14. The method of claim 12, wherein the comparison result does not include a difference magnitude signal of the output voltage and the reference voltage, the first control signal, the second control signal including an adjustment step to adjust the output power;
or,
the comparison result comprises a difference value signal of the output voltage and the reference voltage, and the first control signal and the second control signal comprise adjustment power value signals of the output power which should be adjusted.
15. The method of claim 12, further comprising repeating the step of adjusting the output power until the output voltage is equal to the reference voltage.
CN202311630896.7A 2023-11-30 2023-11-30 Non-contact connector for radio frequency signals and power control method Pending CN117615437A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311630896.7A CN117615437A (en) 2023-11-30 2023-11-30 Non-contact connector for radio frequency signals and power control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311630896.7A CN117615437A (en) 2023-11-30 2023-11-30 Non-contact connector for radio frequency signals and power control method

Publications (1)

Publication Number Publication Date
CN117615437A true CN117615437A (en) 2024-02-27

Family

ID=89955854

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311630896.7A Pending CN117615437A (en) 2023-11-30 2023-11-30 Non-contact connector for radio frequency signals and power control method

Country Status (1)

Country Link
CN (1) CN117615437A (en)

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