Circuit system on antenna module, antenna module and system comprising antenna module

Abstract

Implementations of the present disclosure relate to circuitry for automatically correcting for misconnection of an antenna to a radio frequency (RF) cable. The circuitry includes a first single-pole double-throw (SPDT) switch and a second SPDT switch. An input pole of the first SPDT switch is connected to a first antenna connection line, and an input pole of the second SPDT switch is connected to a second antenna connection line. The first antenna connection line is connected to one of the first RF cable and the second RF cable, and the second antenna connection line is connected to the other of the first RF cable and the second RF cable. The throw to which the input pole of the first SPDT switch or the second SPDT switch is connected may vary based on the RF cable to which the input pole is connected. Thus, the RF cable may be connected to the corrected output, regardless of the antenna to which the RF cable is connected, to automatically correct for erroneous connections.

Description

Background Art

[0001] Outdoor external antennas are usually installed on tall utility poles to obtain better Wi-Fi signal coverage. For safety reasons, users are required to complete the connection between the outdoor external antenna and the access point (AP) before applying power. Each antenna needs to be installed to the corresponding port or the corresponding radio frequency (RF) cable. If the connection is switched by accident, key functions of the outdoor external antenna, such as antenna identification, automatic calculation of cable loss, and antenna heading, will be lost. Brief Description of the Drawings

[0002] The above and other objects, features, and advantages of the example implementations disclosed herein will become more readily apparent through the following detailed description of the example implementations with reference to the accompanying drawings. In the drawings, several example implementations disclosed herein will be illustrated by way of example and not limitation, where

[0003] Figure 1 a schematic diagram illustrating an example environment in which example implementations of the present disclosure can be implemented;

[0004] Figure 2A a block diagram of an automatic calibration circuit system on an external antenna according to some example implementations of the present disclosure;

[0005] Figure 2B a block diagram of an automatic calibration circuit system on an external antenna according to some example implementations of the present disclosure; and

[0006] Figure 3 an exemplary circuit system of a switch controller on an external antenna according to some example implementations of the present disclosure. Detailed Description

[0007] Traditionally, sensors in an antenna module, such as a digital compass and a declinometer, do not have power and digital interfaces. Therefore, it is impossible to power the sensors to sense a directional antenna, such as a 6 GHz antenna, and data cannot be transmitted between the 6 GHz antenna and the AP. When a digital compass or a declinometer is installed on an outdoor 6 GHz antenna to sense the position, direction, coverage area, etc. of the 6 GHz antenna, power needs to be supplied to the sensors in order to sense the directional 6 GHz antenna. The data sensed by the sensors should be transmitted to the indoor AP. Although wireless communications such as Bluetooth are widely used to transmit data, wireless communications have a negative impact on regulation and pose security risks, and cannot be used to power the sensors. Transmitting data and supplying power through cables may be beneficial.

[0008] Generally, outdoor devices need to withstand harsh weather and should at least be waterproof. On the one hand, if new dedicated cables are used to transmit the sensed data and supply power to the sensors, the installation process of the dedicated cables will be more complex, thus increasing the cost. On the other hand, dedicated cables also increase the risk of water leakage.

[0009] RF cables are designed to transmit and receive RF signals with frequencies ranging from 2.4 GHz to 6 GHz between indoor APs and outdoor antennas. If the data sensed by the sensors and the power supplied to the sensors can be transmitted through existing RF cables, no dedicated cables are required, thus simplifying the installation process and reducing the cost and the risk of water leakage. Therefore, for example, two RF cables are used. One of the two RF cables is used to transmit the modulated power and clock signals to the outdoor external antenna, while the other of the two RF cables is used to transmit data (e.g., data transmitted via the I 2 C interface) between the outdoor passive antenna and the indoor AP.

[0010] As described above, outdoor external antennas are usually installed on tall public facility poles to obtain better Wi-Fi signal coverage. For safety reasons, users are required to complete the connection between the outdoor external antenna and the access point (AP) before applying power. Since different RF cables are used to achieve different functions, each antenna needs to be installed to the corresponding port (e.g., the port on the panel for connecting the corresponding RF cable) or the corresponding radio frequency (RF) cable. If the connection is accidentally switched, the key functions of the outdoor external antenna (such as antenna identification, automatic calculation of cable loss, and antenna heading) will be lost.

[0011] To solve the problems in the typical design discussed above, various example implementations of the present disclosure propose a circuit system for automatically correcting the misconnection of an antenna and a radio frequency (RF) cable. The circuit system includes a first single-pole double-throw (SPDT) switch and a second SPDT switch. The input pole of the first SPDT switch is connected to the first antenna connection line, while the input pole of the second SPDT switch is connected to the second antenna connection line. The first antenna connection line is connected to the first antenna, one of the first RF cable and the second RF cable, and the second antenna connection line is connected to the second antenna and the other of the first RF cable and the second RF cable. The throw to which the input pole of the first SPDT switch or the second SPDT switch is connected can be changed based on the RF cable to which the input pole is connected. Therefore, regardless of the antenna to which the RF cable is connected, the RF cable can be connected to the corrected output. Thus, the misconnection of the antenna and the RF cable or the port can be corrected.

[0012] Figure 1is a schematic diagram illustrating an example environment in which various example implementations of the present disclosure may be implemented. As Figure 1 illustrated, system 100 includes AP 101 and antenna module 102. An AP is a networking device that allows wireless-capable devices to connect to a wired network. With the development of wireless communication technologies, an AP is provided with a multiple-input multiple-output (MIMO) system to improve the transmission rate of information and bandwidth utilization. Correspondingly, an AP is provided with multiple front-end modules (FEMs). Communication between the AP and wireless-capable devices may operate according to wireless communication protocols such as Institute of Electrical and Electronics Engineers (IEEE) 802.11 standards, Wi-Fi Alliance specifications, or any other wireless communication standards. The IEEE 802.11 standards may include the IEEE 802.11ay standard (e.g., operating at 60 GHz), the IEEE 802.11ad standard (sometimes referred to as "WiGig"), the IEEE 802.11be (referred to as "WIFI 7"), or any other wireless communication standards.

[0013] As Figure 1 illustrated, antenna module 102 is provided with at least one directional antenna 100A and 100B (such as a passive 6 GHz antenna) and at least one sensor 170 for sensing the position, orientation, coverage, etc. of the 6 GHz antenna. At least one sensor 170 needs to be powered by power from AP 101. As Figure 1 illustrated, directional antenna 100A or 100B is, for example, a passive directional antenna that can generate information about its direction. In some implementations, directional antenna 100A or 100B may be an external 2×2 6 GHz panel antenna including two directional antennas.

[0014] I 2 C interface is generally a powerful bus for communication between one master device (or multiple master devices) and a single slave device or multiple slave devices. Physical I 2 C interface consists of a serial clock (SCL) line and a serial data (SDA) line. Sensor 170 is provided with an I 2 C interface for transmitting and receiving data or power. Thus, AP 101 is provided with a corresponding SCL line for transmitting a clock signal and a corresponding SDA line for transmitting and receiving data. As Figure 1 illustrated, AP 101 includes a clock line 110, such as the SCL line of an I 2 C interface; and a data line 140, such as an I 2The SDA line of the C interface. The clock line 110 is configured to transmit or generate a clock signal having alternating high-power and low-power levels. The clock signal can be transmitted to at least one sensor 170 provided on the antenna module 102 to sample the data sensed by the sensor 170. The SDA line 140 is configured to send a request to the sensor to request the data sensed by the sensor 170, and then receive the data sensed from the sensor 170, such as information about the position, orientation, and coverage area of the directional antenna 100A or 100B.

[0015] Continuing to refer Figure 1 , the AP 101 also includes a first power supply 120A and a second power supply 120B. The first power supply 120A can be a power supply for providing a high voltage of, for example, 5V, while the second power supply 120B can be a power supply for providing a low voltage of, for example, 4.2V.

[0016] As discussed above, there is no power supply at a passive antenna (such as a passive 6GHz antenna). If sensors (such as a digital compass and a declinometer) are provided on a passive antenna (such as a passive 6GHz antenna) to sense the position, orientation, and coverage of the antenna, power should be supplied to the sensors to operate. Further, the sensed data from the sensor 170 will be transmitted to the AP 101, and dedicated cables for transmitting data signals and clock signals may increase the risk of water leakage. Therefore, as Figure 1 illustrated, the system 100 also includes two RF cables 150 and 160 for powering the antenna and transmitting data between the AP and the antenna to avoid the risk of water leakage.

[0017] As Figure 1 illustrated, the AP 101 also includes a modulator 130 that is connected to the clock line 110, the first power supply 120A, and the second power supply 120B to receive the clock signal and the power voltage. The modulator 130 is configured to modulate the clock signal and the power voltage into a single modulated power. Since the clock signal has alternating high and low voltages, the modulated power has alternating high-power and low-power voltages. In some implementations, in the modulated power, the high-power voltage is about 5V and the low-power voltage is about 4.2V.

[0018] As Figure 1 illustrated, the modulated power of the high voltage (e.g., 5V) and the low voltage (e.g., 4.2V) is transmitted to the antenna module 102 through a radio cable 150 (e.g., an RF cable for SCL), which is one of the two cables designed for a 2×2 panel antenna. As Figure 1As shown, the sensed data is transmitted to the AP 101 via another radio cable 160 (e.g., an RF cable for SDA), which is the other of the two cables designed for the 2×2 panel antenna. The RF cable is configured to transmit radio frequency signals, typically signals having a frequency ranging from 2.4 GHz to 6 GHz. At the same time, the frequency of the clock signal is typically from 50 kHz to 500 kHz, which is much lower than the frequency of the RF signal. Since the RF choke can provide good isolation between the I 2 C signal and the RF signal, there is no interference between the modulated power and the RF signal.

[0019] The modulated power is transmitted over the radio cable 150 to the antenna module 102 to power the sensor 170. Since the modulated power cannot be used as a clock signal for the data sensed by the sensor 170, as Figure 1 shown, the antenna module 102 further includes a demodulator 180, which is connected to the radio cable 150 and is configured to receive the modulated power and demodulate the modulated power into a demodulated clock signal. The demodulated clock signal has the same frequency or duty cycle as the clock signal, thus largely reproducing the clock signal. Then, the demodulated clock signal is received by the sensor 170 to sample the sensed data. In some implementations, the output of the demodulator 180 should be open-drain or open-collector to comply with the I 2 C specification.

[0020] Furthermore, the sensor 170 is powered by the modulated power to sense the position, orientation, coverage, etc. of the 6 GHz antenna. As Figure 1 shown, the antenna module 102 is also provided with a low dropout regulator (LDO) 190, which is configured to receive the modulated power and convert the alternating high voltage and low voltage into a constant voltage, e.g., 3.3V, which is supplied to the sensor 170 to power it.

[0021] By such as Figure 1The illustrated system 100 can deploy a compass sensor / dip meter sensor on a 6 GHz panel antenna to meet the AFC requirements and provide RF visualization, so as to obtain the position, orientation, and coverage area of the 6 GHz antenna, etc. Further, by setting a modulator in the AP and a demodulator in the antenna module, an expected signal (such as a clock signal) and a power voltage can be modulated into a single modulated power at the modulator. The single modulated power can be transmitted to the antenna module through a single RF cable. Then, the modulated power received from the single RF cable can be demodulated into a clock signal at the demodulator. Therefore, a single existing RF cable designed to transmit RF signals can be used to transmit the modulated power, and there is no need to provide a dedicated cable to transmit the clock signal, nor is there a need to provide another dedicated cable to supply the power voltage to the sensor. Thus, the installation process can be simplified, the cost can be significantly reduced, and the risk of water leakage can be reduced.

[0022] The antenna module 102 is usually installed on a tall utility pole to obtain better Wi-Fi signal coverage. For safety reasons, the user needs to complete the connection between the outdoor external antenna module 102 and the AP 101 before applying power. For example, the user needs to climb the tall utility pole to install the RF cable 150 for SCL to the first port 151 on the antenna module 102 and install the RF cable 160 for SDA to the second port 161 on the antenna module 102. The first port 151 is connected to the first connecting wire 152, which is a wire for connecting to the clock wire 171 of the sensor 170; the second port 161 is connected to the second connecting wire 162, which is a wire for connecting to the data wire 172 of the sensor 170.

[0023] After installing the RF cables to the corresponding ports, the antenna module can be powered on, and then, the sensor on the antenna module 102 can be powered by the LDO 190 to work. If the user accidentally installs the RF cable 150 to the second port 161, the modulated clock signal will be transmitted to the data wire 172 of the sensor 170, so it cannot be demodulated into a clock signal by the demodulator 180, and the sensor 170 cannot be powered by the power from the LDO 190. If the RF cable 160 is installed to the first port 151, the data is transmitted to the demodulator 180, the data from the AP 101 cannot reach the sensor 170, and the data from the sensor 170 also cannot reach the AP 101. Therefore, the key functions of the outdoor external antenna, such as antenna identification, automatic calculation of cable loss, and antenna heading, cannot be achieved. Typically, to correct the wrong connection, the user has to climb the tall utility pole again to swap the connections of the two RF cables, resulting in a waste of labor cost, inconvenient operation, and high installation cost.

[0024] Figure 2A and Figure 2B illustrates a block diagram of an automatic calibration circuit system on an external antenna according to some example implementations of the present disclosure. As Figure 2A and Figure 2B illustrated, antenna module 202 corresponds to Figure 1 antenna module 102, cable 260 corresponds to Figure 1 cable 160, cable 250 corresponds to Figure 1 cable 150, port 261 corresponds to Figure 1 port 161, port 251 corresponds to Figure 1 port 151, antenna 200A or 200B corresponds to Figure 1 antenna 100A or 100B, line 262 corresponds to Figure 1 line 162, line 252 corresponds to Figure 1 line 152, modulator 280 corresponds to Figure 1 modulator 180, and sensor 270 corresponds to Figure 1 sensor 170. LDO 290 corresponds to Figure 1 LDO 190, line 272 corresponds to Figure 1 line 172, and line 271 corresponds to Figure 1 line 171.

[0025] As illustrated in FIG. 2, the automatic calibration circuit system is disposed on antenna module 202. The circuit system includes a first antenna connection line 262 that is connected to one of the RF cables of the first antenna 200A, the first RF cable, and the second RF cable. The circuit system further includes a second antenna connection line 252 that is connected to the second antenna 200B and the other RF cable of the first RF cable and the second RF cable. In some implementations, as Figure 2A illustrated, the first antenna connection line 262 is connected to the RF cable 260 for SDA, while the second antenna connection line 252 is connected to the RF cable 250 for SCL. In some implementations, as Figure 2B illustrated, the first antenna connection line 262 is connected to the RF cable 250 for SCL, while the second antenna connection line 252 is connected to the RF cable 260 for SDA. That is, the first antenna connection line 262 can be connected to either the RF cable for SDA or the RF cable for SCL.

[0026] As Figure 2A and Figure 2BAs shown, the circuit system further includes a first single-pole double-throw (SPDT) switch 204. In some implementations, the SPDT switch 204 includes a first input terminal D1 (which is connected to the first antenna connection line 262), a first throw S1A, and a second throw S1B. The first throw S1A and the second throw S1B are connected to different components. In some implementations, as Figure 2A and Figure 2B shown, the first throw S1A is connected to the sensor 270 via the line 272 for SDA, and the second throw S1B is connected to the demodulator 280. Then, the demodulated clock signal is transmitted from the demodulator 280 to the sensor 270 via the line 271 for SCL.

[0027] As Figure 2A and Figure 2B shown, the circuit system further includes a second single-pole double-throw (SPDT) switch 205. In some implementations, the SPDT switch 205 includes a second input terminal D2 (which is connected to the second antenna connection line 252), a third throw S2A, and a fourth throw S2B. The third throw S2A and the fourth throw S2B are connected to different components. In some implementations, as Figure 2A and Figure 2B shown, the third throw S2A is connected to the demodulator 280. Then, the demodulated clock signal is transmitted from the demodulator 280 to the sensor 270 via the line 271 for SCL, and the fourth throw S2B is connected to the sensor 270 via the line 272 for SDA.

[0028] In some implementations, based on the cable to which the first antenna connection line 262 is connected, the first input terminal D1 of the SPDT switch 204 can be connected to the corresponding throw of the first throw S1A and the second throw S1B, and the second input terminal D2 of the SPDT switch 205 can be connected to the corresponding throw of the third throw S2A and the fourth throw S2B.

[0029] In some implementations, as Figure 2A and Figure 2B shown, the first input terminal D1 is configured to be connected to the first throw S1A in response to determining that the first antenna connection line 262 is connected to the RF cable 260 for SDA, and is configured to be connected to the second throw S1B in response to determining that the first antenna connection line 262 is connected to the second RF cable 250 for SCL.

[0030] In some implementations, as Figure 2A and Figure 2BAs illustrated, the second input pole D2 is configured to connect to the third throw S2A in response to determining that the first antenna connection line 262 is connected to the RF cable 260 for SDA, and is configured to connect to the fourth throw S2B in response to determining that the first antenna connection line 262 is connected to the second RF cable 250 for SCL.

[0031] Thus, in response to determining that the first antenna connection line 262 is connected to the RF cable 260 for SDA, the SDA data from the RF cable 260 can be transmitted to the sensor 270 via the first throw S1A, and the SCL data from the RF cable 250 can be transmitted to the demodulator 280 via the third throw S2A. In response to determining that the first antenna connection line 262 is connected to the RF cable 250 for SCL, the SDA data from the RF cable 260 can be transmitted to the sensor 270 via the fourth throw S2B, and the SCL data from the RF cable 250 can be transmitted to the demodulator 280 via the second throw S1B.

[0032] In some implementations, this determination can be implemented by the switch controller 203. As Figure 2A and Figure 2B illustrated, the SPDT switch 204 and the SPDT switch 205 are controlled by the same switch controller 203, and the switch controller 203 is connected to the antenna connection line 252 via the inductor L2 to sense the connection of the antenna connection line 252 to the RF cable 250 or 260, and then outputs a control signal to control the SPDT switch 204 and the SPDT switch 205. In some implementations, since the voltage carried by the RF cable 250 is different from the voltage carried by the RF cable 260, when a high voltage is sensed, the switch controller 203 can sense that the antenna connection line 252 is connected to the SCL RF cable 250; and when a low voltage is sensed, the switch controller 203 can sense that the antenna connection line 252 is connected to the SDA RF cable 260.

[0033] As Figure 2A and Figure 2B illustrated, in the case where the cable 250 is configured to transmit SCL-related signals and the RF cable 260 is configured to transmit SDA-related signals, the first throw S1A and the fourth throw S2B are connected to the sensor 270 to transmit SDA-related signals, and the second throw S1B and the third throw S2A are connected to the demodulator 280 to transmit SCL-related signals. However, it should be understood that if the RF cable 250 is configured to receive SDA-related signals from the AP and the RF cable 260 is configured to receive SCL-related signals from the AP, then the first throw S1A and the fourth throw S2B are connected to the demodulator 280, and the second throw S1B and the third throw S2A are connected to the sensor 270.

[0034] That is to say, the first throw S1A and the third throw S1A work simultaneously, and the second throw S1B and the fourth throw S2B work simultaneously. Regardless of what kind of cable is connected to the first antenna connection line or the second antenna connection line, the corresponding SDA signal and SCL signal can be transmitted to the sensor 270 and the demodulator 280 respectively. Therefore, regardless of the antenna to which the RF cable is connected, the RF cable can be connected to the corrected output so that the signal from the AP can be transmitted to the corresponding correct component on the antenna module, thereby automatically correcting the incorrect connection between the antenna and the RF cable.

[0035] In some implementations, such as Figure 2A and Figure 2B as illustrated, the port 261 is connected to the first antenna 200A via the capacitor C1, and the port 251 is connected to the second antenna 200B via the capacitor C2. In some implementations, the capacitors C1 and C2 can be RF coupling capacitors so that RF signals can pass through them to feed the antenna elements. In some implementations, such as Figure 2A and Figure 2B as illustrated, the antenna connection line 262 is connected to the LDO 290 via the inductor L1 and the diode D1, and the antenna connection line 252 is connected to the LDO 290 via the inductor L2 and the diode D2. In some implementations, the inductors L1 and L2 can be RF chokes so that RF signals cannot pass through them to split the power signal and the digital signal (e.g., the modulated SCL signal and SDA data) from the RF cable, such that the power signal and the digital signal can pass through the inductors L1 and L2 while the RF signal does not pass through them. In some implementations, the diodes D1 and D2 can be Schottky diodes to feed the LDO 290 and prevent reverse voltage and reverse current from reaching the SDA line. In some implementations, such as Figure 2A and Figure 2B as illustrated, the inductors L1 and L2 are also connected to the ground via the capacitors C3 and C4 respectively, so that some low-frequency noise can be removed from the signals passing through the inductors L1 and L2.

[0036] In some implementations, such as Figure 2A and Figure 2BAs illustrated, since the SDA signal from the AP to the antenna module or the SDA signal from the antenna module to the AP will pass through the SPDT switch 204 and the SPDT switch 205, the input poles and throws of the SPDT switches can allow bidirectional analog and digital signals to pass through, enabling the SDA signal to pass through them. In some implementations, the SPDT switch 204 and the SPDT switch 205 are powered by 3.3V; and since the modulated power of high voltage (e.g., 5V) and low voltage (e.g., 4.2V) can pass through the SPDT switch 204 and the SPDT switch 205, the SPDT switch 204 and the SPDT switch 205 may support signals other than the 3.3V power supply to avoid using a boost circuit for providing power higher than the power supply. For example, the SPDT switch 204 and the SPDT switch 205 may support a rating of at least 5V. In some implementations, the signaling path of the SPDT switch 204 can be well isolated from the signaling path of the SPDT switch 205. For example, the input pole D1 of the SPDT switch 204 is well isolated from the input pole D2 of the SPDT switch 205, the throw S1A is well isolated from the throw S2A, and the throw S1B is well isolated from the throw S2B. Further, in some embodiments, the SPDT switch 204 and the SPDT switch 205 can be located on the same chip to facilitate wiring and save space.

[0037] As described above, when the antenna connection line 252 is connected to the SCL RF cable 250, the modulated power is input to the antenna connection line 252; and when the antenna connection line 252 is connected to the SDA RF cable 260, the voltage of the SDA signal is input to the antenna connection line 252. Therefore, by sensing the voltage input to the antenna connection line 252, the switch controller 203 can sense the type of cable to which the antenna connection line 252 is connected. That is, the switch controller 203 can control the first SPDT switch 204 and the second SPDT switch 205 such that in response to determining that the cable to which the first antenna connection line 262 is connected changes, the switch controller 203 controls to change the corresponding throws connected to the first input pole and the corresponding throws connected to the second input pole. In some implementations, the switch controller 203 is implemented by a comparator.

[0038] Figure 3 An exemplary circuit system of a switch controller on an external antenna according to some example implementations of the present disclosure is illustrated, where the switch controller 303 corresponds to the switch controller 203 in FIG. 2, the SPDT switch 304 corresponds to the SPDT switch 204 in FIG. 2, and the SPDT switch 305 corresponds to the SPDT switch 205 in FIG. 2.

[0039] As Figure 3As illustrated, comparator 303 includes: a first input terminal 303A for receiving an input voltage, a second input terminal 303B for receiving a reference voltage, and an output terminal 303C connected to SPDT switches 304 and 305 to control their outputs. By outputting different signals to SPDT switch 304, the input pole D1 of SPDT switch 304 can be controlled to selectively connect to throw S1A or S1B; and by outputting different signals to SPDT switch 305, the input pole D2 of SPDT switch 305 can be controlled to selectively connect to throw S2A or S2B.

[0040] In some implementations, the voltage for the modulated power can be in the range of 4.2V to 5V, and the voltage for the SDA signal can be in the range of 0V to 3V. As Figure 3 illustrated, by setting the values of resistors R3 and R4, when the antenna connection line is connected to the SCL RF cable, the voltage input to the first input terminal 303A can swing from 2.1V to 2.5V; and when the antenna connection line is connected to the SDA RF cable, the voltage input to the first input terminal 303A can swing from 0V to 1.5V. In some implementations, the value of resistor R1 can be 33KΩ, and the value of resistor R2 can be 33KΩ. In some implementations, I 2 C SDA signal is a resistor pull-up signal, and this signal is pulled up by a resistor (not shown, for example, with a resistance value of about 1.5KΩ). Since the values of resistor R1 and resistor R2 can be 33KΩ, which is much larger than 1.5KΩ, so I 2 C SDA signal will not be pulled down by resistor R1 and resistor R2, thus ensuring that I 2 the high-level voltage of the C SDA signal is about 3V. In some implementations, resistor R5 works with resistor R1 to set the hysteresis of comparator 303.

[0041] As Figure 3As shown, the reference voltage of the second input terminal 303B is achieved by setting the values of resistors R3, R4, and power supply VDD such that the reference voltage can be approximately 1.7V. In some implementations, the value of resistor R3 can be 1KΩ, the value of resistor R4 can be 1.2KΩ, and the power supply VDD can be 3.3V, such that the reference voltage can be approximately 1.7V. When the antenna connection line is connected to the SCL RF cable, the voltage of 2.1V to 2.5V input to the first input terminal 303A is higher than the reference voltage of 1.7V, and the output terminal 303C can output a low-level signal. When the antenna connection line is connected to the SDA RF cable, the voltage of 0V to 1.5V input to the first input terminal 303A is lower than the reference voltage of 1.7V, and the output terminal 303C can output a high-level signal.

[0042] By receiving different output signals from the output terminal 303C, the input pole D1 of the SPDT switch 304 can be selectively connected to the throw S1A or S1B, and the input pole D2 of the SPDT switch 305 can be selectively connected to the throw S2A or S2B. Thus, the input pole of the SPDT can be connected to different throws according to the RF cable to which the antenna connection line 252 is connected. Then, regardless of the RF cable connected to the antenna module, the modulated power can always be transmitted to the demodulator, and the SDA signal can always be transmitted to the sensor. Therefore, the incorrect connection between the RF cable and the antenna module can be automatically corrected by connecting the input pole of the SPDT switch to different throws according to the connection of the RF cable, and the operator does not need to know the correct connection port of the corresponding RF cable, and the operator can install the RF cable into any port.

[0043] In the context of the present disclosure, although the operations are described in a particular order, this should not be construed as requiring that the operations be performed in the particular order shown or in sequential order, or that all illustrated operations be performed to achieve a desired result. In some cases, multitasking and parallel processing may be advantageous. Certain features described in the context of separate implementations may also be implemented in combination in a single implementation. Conversely, the various features described in the context of a single implementation may also be implemented separately or in any suitable sub-combination in multiple implementations.

[0044] In the foregoing detailed description of the present disclosure, reference is made to the accompanying drawings that form a part hereof, and in which are shown by way of illustration examples of how the present disclosure may be practiced. The examples are described in sufficient detail to enable those skilled in the art to practice the examples of the present invention, and it should be understood that other examples may be utilized and that process changes, electrical changes, and / or structural changes may be made without departing from the scope of the present invention.

Claims

1. A circuit system, comprising: A first antenna connection line connected to a first antenna and one of a first radio frequency (RF) cable and a second RF cable; A second antenna connection line connected to a second antenna and the other of the first RF cable and the second RF cable; A first single-pole double-throw (SPDT) switch including a first input terminal connected to the first antenna connection line, a first throw, and a second throw, wherein the first input terminal is configured to connect to the first throw in response to determining that the first antenna connection line is connected to the first RF cable, and is configured to connect to the second throw in response to determining that the first antenna connection line is connected to the second RF cable; And A second SPDT switch including a second input terminal connected to the second antenna connection line, a third throw, and a fourth throw, wherein the second input terminal is configured to connect to the third throw in response to determining that the second antenna connection line is connected to the second RF cable, and is configured to connect to the fourth throw in response to determining that the second antenna connection line is connected to the first RF cable.

2. The circuit system according to claim 1, wherein the first RF cable and the second RF cable are connected between an access point and an antenna module, and the antenna module includes the circuit system, and the antenna module further includes: The first antenna; The second antenna; A demodulator configured to demodulate the modulated power from the access point into a demodulated clock signal; And A sensor configured to receive the demodulated clock signal to sense the first antenna and the second antenna.

3. The circuit system according to claim 2, wherein the access point includes: A clock line configured to transmit a clock signal; A first power supply configured to output a first voltage; A second power supply configured to output a second voltage; And A modulator configured to receive the clock signal, the first voltage, and the second voltage, and modulate the clock signal into the modulated power using the first voltage and the second voltage.

4. The circuit system according to claim 2, wherein the first throw and the fourth throw are connected to one of the demodulator and the sensor, and the second throw and the third throw are connected to the other of the demodulator and the sensor.

5. The circuit system according to claim 4, wherein the first RF cable is configured to transmit data signals, and the second RF cable is configured to transmit the modulated power, and wherein the first throw and the fourth throw are connected to the sensor, and the second throw and the third throw are connected to the demodulator.

6. The circuit system according to claim 4, wherein the first RF cable is configured to transmit the modulated power, and the second RF cable is further configured to transmit data signals, and wherein the first throw and the fourth throw are connected to the demodulator, and the second throw and the third throw are connected to the sensor.

7. The circuit system according to claim 1, wherein the circuit system further comprises a switch controller configured to control the first SPDT switch and the second SPDT switch such that in response to determining that the cable to which the first antenna connection line is connected changes, the switch controller controls to change the corresponding throw to which the first input pole is connected and the corresponding throw to which the second input pole is connected.

8. The circuit system according to claim 7, wherein the switch controller comprises a comparator, and the comparator comprises: a first input terminal connected to one of the first antenna connection line and the second antenna connection line to receive a data signal or a modulated power; a second input terminal connected to a reference voltage; and an output terminal connected to the first SPDT switch and the second SPDT.

9. The circuit system according to claim 8, wherein the data signal has a voltage within a first range, and the modulated power has a voltage within a second range, and the first range is lower than the second range.

10. The circuit system according to claim 1, wherein the first SPDT switch and the second SPDT switch are disposed on the same chip.

11. The circuit system according to claim 2, wherein the antenna module further comprises a low dropout regulator (LDO) connected to both the first antenna connection line and the second antenna connection line to supply power to the sensor.

12. An antenna circuit system, comprising: a first antenna; a second antenna; and a circuit system, comprising: a first antenna connection line connected to the first antenna and one of a first radio frequency (RF) cable and a second RF cable; a second antenna connection line connected to the second antenna and the other of the first RF cable and the second RF cable; a first single-pole double-throw (SPDT) switch comprising a first input pole, a first throw, and a second throw connected to the first antenna connection line, wherein the first input pole is configured to be connected to the first throw in response to determining that the first antenna connection line is connected to the first RF cable, and is configured to be connected to the second throw in response to determining that the first antenna connection line is connected to the second RF cable; and a second SPDT switch comprising a second input pole, a third throw, and a fourth throw connected to the second antenna connection line, wherein the second input pole is configured to be connected to the third throw in response to determining that the second antenna connection line is connected to the second RF cable, and is configured to be connected to the fourth throw in response to determining that the second antenna connection line is connected to the first RF cable.

13. The antenna module according to claim 12, further comprising: a demodulator configured to demodulate the modulated power from the access point into a demodulated clock signal; and a sensor configured to receive the demodulated clock signal to sense the first antenna and the second antenna.

14. The antenna module according to claim 12, wherein the first RF cable and the second RF cable are connected between an access point and the antenna module, and the first throw and the fourth throw are connected to one of the demodulator and the sensor, and the second throw and the third throw are connected to the other of the demodulator and the sensor.

15. The antenna module according to claim 14, wherein the first RF cable is configured to transmit a data signal, and the second RF cable is further configured to transmit the modulated power, and wherein the first throw and the fourth throw are connected to the sensor, and the second throw and the third throw are connected to the demodulator.

16. The antenna module according to claim 12, wherein the circuitry further includes a switch controller for controlling the first SPDT switch and the second SPDT switch such that in response to determining that the cable to which the first antenna connection line is connected changes, the switch controller controls to change the corresponding throw to which the first input pole is connected and the corresponding throw to which the second input pole is connected.

17. A system, comprising: an antenna module, comprising: a first antenna; a second antenna; and circuitry, comprising: a first antenna connection line connected to the first antenna and one of a first radio frequency (RF) cable and a second RF cable; a second antenna connection line connected to the second antenna and the other of the first RF cable and the second RF cable; a first single-pole double-throw (SPDT) switch including a first input pole, a first throw, and a second throw connected to the first antenna connection line, wherein the first input pole is configured to be connected to the first throw in response to determining that the first antenna connection line is connected to the first RF cable, and is configured to be connected to the second throw in response to determining that the first antenna connection line is connected to the second RF cable; and a second SPDT switch including a second input pole, a third throw, and a fourth throw connected to the second antenna connection line, wherein the second input pole is configured to be connected to the third throw in response to determining that the second antenna connection line is connected to the second RF cable, and is configured to be connected to the fourth throw in response to determining that the second antenna connection line is connected to the first RF cable; and an access point connected to the antenna module via the first RF cable and the second RF cable.

18. The system according to claim 17, wherein the antenna module further includes: a demodulator configured to demodulate the modulated power from the access point into a demodulated clock signal; and a sensor configured to receive the demodulated clock signal to sense the first antenna and the second antenna.

19. The system according to claim 18, wherein the access point includes: a clock line configured to transmit a clock signal; [[ID= ​ ​ A modulator, configured to receive the clock signal, the first voltage, and the second voltage, and modulate the clock signal into the modulated power using the first voltage and the second voltage.

20. The system according to claim 17, wherein the circuitry further includes a switch controller for controlling the first SPDT switch and the second SPDT switch such that in response to determining that the cable to which the first antenna connection line is connected changes, the switch controller controls a change in the corresponding throw to which the first input pole is connected and the corresponding throw to which the second input pole is connected.

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