WO2013131229A1

WO2013131229A1 - Wireless communication node

Info

Publication number: WO2013131229A1
Application number: PCT/CN2012/071927
Authority: WO
Inventors: 彭勇; 景丰华
Original assignee: 华为终端有限公司
Priority date: 2012-03-05
Filing date: 2012-03-05
Publication date: 2013-09-12
Also published as: CN102714516A

Abstract

The present invention provides a wireless communication node. The node comprises: a wireless communication module (31), a first attenuation network (32) and an antenna (33). The first attenuation network (32) is disposed between an output end of the wireless communication module (31) and the antenna (33). Input power of the antenna (33) is in the range of target power. In embodiments of the present invention, the attenuation network is disposed between the wireless communication module (31) and the antenna (33), so that output power of the wireless communication module (31) can be set to be larger compared with that in a scenario without the attenuation network, and therefore influence of temperature on the output power can be reduced, and the implementation is simple and the costs are low because only the attenuation network is added and device parameters are slightly adjusted compared with the prior art.

Description

Wireless communication node

The present invention relates to the field of wireless communications technologies, and in particular, to a wireless communication node. Background technique

Zigbee Zigbee is an emerging short-range, low-complexity, low-power, low-data-rate, low-cost wireless networking technology. Zigbee is primarily used for short-range wireless connections. It is based on the Institute of Electrical and Electronics Engineers (IEEE) 802.15.4 standard, which coordinates communications among thousands of tiny sensors. These sensors require very little energy to relay data from one node to another in a relay, so communication is very efficient. Due to device characteristics, power modules in Zigbee nodes, such as Zigbee chips, will have lower output power at high temperatures and higher output power at low temperatures. To ensure that the output power at room temperature meets the target power requirements, it will output at low temperatures. The power easily exceeds the target power, resulting in non-compliance with design requirements.

In order to reduce the influence of temperature on the power of the Zigbee node, an existing solution is to add temperature compensation, that is, through temperature detection, query the corresponding table of temperature and power compensation according to the detected temperature value to obtain a power compensation value, and then perform power compensation. make up. Another solution is to add power detection and control, that is, the relationship between the coupled power and the real output power is obtained by calibration, and the coupled power is detected during normal operation, and the corresponding real output power is obtained according to the measured coupled power, which will be true. The output power is compared with the target power as the basis for power adjustment.

In the process of implementing the present invention, the inventor has found that: in addition to the Zigbee node, other wireless communication nodes, such as a Wireless Fidelity (WiFi) node, a Bluetooth (Bluetooth (BT) node, etc., also have the above temperature effects. The problem of output power (also known as power drift with temperature), and existing solutions are complex and costly to implement. Summary of the invention

Embodiments of the present invention provide a wireless communication node for providing a solution for reducing the influence of temperature on output power. A wireless communication node provided by an embodiment of the present invention includes:

a wireless communication module, a first attenuation network and an antenna;

The first attenuation network is disposed between an output end of the wireless communication module and the antenna; and an input power of the antenna is within a target power range.

The embodiment of the invention adopts a technical means for setting an attenuation network before the wireless communication module and the antenna, so that the output power of the wireless communication module can be set larger than in the case of no attenuation network, and the output power of the wireless communication module is increased by the temperature. The smaller the influence, the smaller the total output power of the wireless communication node is affected by the temperature, and therefore, the embodiment of the present invention can reduce the influence of temperature on the output power. DRAWINGS

The drawings used in the embodiments or the description of the prior art are briefly described. It is obvious that the drawings in the following description are some embodiments of the present invention, and are not creative to those skilled in the art. Other drawings can also be obtained from these drawings on the premise of labor.

FIG. 1 is a schematic structural diagram of a wireless communication node according to an embodiment of the present invention; FIG. 2 is a schematic structural diagram of another wireless communication node according to an embodiment of the present invention; FIG. FIG. 4 is a schematic structural diagram of another wireless communication node according to an embodiment of the present invention; FIG. 5 is a schematic diagram of an application scenario according to an embodiment of the present invention;

FIG. 6 is a schematic diagram of still another application scenario according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of still another application scenario according to an embodiment of the present invention. The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. The embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention. FIG. 1 is a schematic structural diagram of a wireless communication node according to an embodiment of the present invention. As shown in Figure 3, the wireless communication node includes:

a wireless communication module 31, a first attenuation network 32 and an antenna 33;

The first attenuation network 32 is disposed between the wireless communication module 31 and the antenna 33;

The input power of antenna 33 is within the target power range.

The wireless communication module 31, the first attenuation network 32, and the antenna 33 constitute a transmission channel of the wireless communication node. It should be noted that, on the transmitting channel, before the antenna 33, the antenna switching switch Switch for switching the transmitting and receiving functions of the antenna 33 may be further included. Specifically, the wireless communication module 31 may be a module having a wireless communication function such as a Zigbee chip, a WiFi chip, or a BT chip. Correspondingly, the wireless communication node may be referred to as a Zigbee node, a WiFi node, or a BT node. The first attenuation network 32 can be a network or device capable of effectively reducing power, such as a resistor network, a notch network, an attenuator, and the like. The input power of the antenna 33 is also the total output power of the wireless communication node.

In the process of implementing the present invention, the inventors discovered through experiments that: the greater the output power of the wireless communication module, the smaller the output power is affected by the temperature, that is, the output power of the wireless communication module is in a saturated state, and the power is affected. The temperature has the least impact. In general, the output power (also called transmit power) of the wireless communication module 31 can be configured by software.

In an optional embodiment of the present invention, the attenuation value of the first attenuation network 32 may be configured by adjusting the device parameter of the first attenuation network 32 according to the target power range and the output power of the wireless communication module 31, so that the wireless communication module 31 The output power is attenuated by the first attenuation network 32 and is within the target power range. For example, assuming that the output power of the wireless communication module 31 is Pchip, the target power range is {Paim}, and the attenuation value of the first attenuation network 32 is A1, it should satisfy: Pchip-Al e {Paim}.

It can be seen that, in order to achieve the same target power, the larger the attenuation value of the first attenuation network 32, the higher the output power of the wireless communication module 31 can be correspondingly increased. Further, the attenuation value of the first attenuation network 32 is configured to increase the output power of the wireless communication module 31 by adjusting the device parameters of the first attenuation network 32. Preferably, the output power of the wireless communication module 31 is configured to be saturated, i.e., the wireless communication module 31 operates in a maximum output power state.

Further, when the device parameters of the first attenuation network 32 are adjusted such that the output power of the wireless communication module 31 is saturated or nearly saturated, the input power of the antenna 33 reaches the target power. The maximum value, in this way, when the output power of the wireless communication module 31 is reduced, it is also possible to ensure that the input power of the antenna 33 is within the target power range. Wherein, the output power of the wireless communication module 31 is close to saturation, which can be determined by the designer according to the empirical value. For example, the maximum output power of the wireless communication module 31 is 10 dBm dBm, and when the output power of the wireless communication module 31 is greater than 9 dBm, the output power of the wireless communication module 31 is considered to be close to saturation.

Further, since the wireless communication module 31 and the antenna 33 are both radio frequency devices, the respective electrical characteristics may not match, and a matching network may be added between the wireless communication module 31 and the antenna 33 to minimize loss and distortion of radio signal transmission. . Correspondingly, the node can also include:

The first matching network is disposed between the wireless communication module 31 and the antenna 33 for matching electrical characteristics of the wireless communication module 31 and the antenna 33. If the antenna 33 further includes a switch, the first matching network may be disposed between the wireless communication module 31 and the switch for matching the electrical characteristics of the wireless communication module 31 and the switch. In addition, a matching network can be set between the Switch and the antenna 33 to match the electrical characteristics of the Switch and the antenna 33.

Specifically, the first matching network is composed of a device such as a capacitor or an inductor. In general, the order of the matching network and the attenuation network in the transmit channel can be interchanged. Specifically, the output of the attenuation network 32 is connected to the antenna 33 or Switch through the first matching network, or the output of the wireless communication module 31 is connected to the attenuation network 32 through the first matching network.

FIG. 2 is a schematic structural diagram of still another wireless communication node according to an embodiment of the present invention. As shown in FIG. 2, on the basis of the embodiment shown in FIG. 1, the wireless communication node further includes:

PA34, disposed between the first attenuation network 32 and the antenna 33;

The output power of the first attenuation network 32 is not greater than the maximum input power of the PA 34.

Specifically, the output power of the first attenuation network 32 is the power after attenuating the output power of the wireless communication module 31. Assume that the output power of the wireless communication module 31 is Pchip, the target power range is {Paim}, the attenuation value of the first attenuation network 32 is Al, the maximum input power of the PA34 is Pin, the gain of the PA34 is G, and the maximum output power of the PA34 is Pout, the output power through the first attenuation network 32 is Pchip-Al, Pchip-Al Pin. At the same time, in order to meet the target power requirement, if the output power of the PA34 is not saturated, the output power of the PA34 is Pchip-Al+G <Pout, the input power of the antenna 33 is also Pchip-Al+G, and Pchip-Al+Ge {Paim}; If the output power of the PA34 is saturated, that is, Pchip-Al+G Pout, the antenna 33 The input power is Pout, and Poute {Paim}.

It can be seen that in the case where the output power of the PA 34 is not saturated, the output power of the wireless communication module 31 can be correspondingly increased as the attenuation value of the first attenuation network 32 is larger to achieve the same target power. Further, the attenuation value of the first attenuation network 32 is configured to increase the output power of the wireless communication module 31 by adjusting the device parameters of the first attenuation network 32. Preferably, the output power of the wireless communication module 31 is configured to be saturated, that is, the wireless communication module 31 operates in the maximum output power state.

Since the output power of the PA is also affected by the temperature, in general, the larger the gain of the PA, the greater the influence by the temperature, and the output power of the PA and the output power of the wireless communication module are usually affected by the temperature. Non-cancellation causes the total output power of the wireless communication node to vary greatly in high and low temperature conditions. In the process of implementing the present invention, the inventors discovered through experiments that the larger the output power of the PA, the smaller the output power is affected by the temperature, that is, the output power of the PA is in a saturated state, and the temperature is minimally affected.

Assuming that the maximum output power of the PA34 is Pout, the output power of the PA34 is saturated when Pchip-Al+G^Pout is satisfied. It can be seen that the smaller the attenuation value of the first attenuation network 32, the closer the output power of the PA 34 is to saturation. Further, the attenuation value of the first attenuation network 32 is configured to increase the output power of the P A 34 by adjusting the device parameters of the first attenuation network 32. Preferably, the output power of the PA 34 is configured to be saturated, even if the output power of the PA 34 is the maximum output power of the PA 34.

Further, when the device parameters of the first attenuation network 32 are adjusted such that the output power of the wireless communication module 31 is saturated or nearly saturated, the input power of the antenna 33 reaches the maximum value of the target power, or the output power of the PA 34 is saturated. Or near saturation, the input power of the antenna 33 reaches the maximum value of the target power, so that when the output power of the wireless communication module 31 or the PA 34 is reduced, the input power of the antenna 33 can be ensured to be within the target power range as much as possible. . Optionally, the device parameters of the first attenuation network 32 are adjusted such that when the output powers of the wireless communication module 31 and the PA 34 are both saturated or nearly saturated, the input power of the antenna 33 reaches a maximum value of the target power. Among them, the output power of PA34 is close to saturation, which can be determined by the designer based on the empirical value. For example, the maximum output power of the PA34 is 20dBm, then when PA34 When the output power is greater than 19dBm, the output power of the PA34 is considered to be close to saturation.

Further, since the wireless communication module 31, the PA34, and the antenna 33 are all radio frequency devices, the respective electrical characteristics may not match, and a matching network may be added between the wireless communication module 31 and the PA 34, and between the PA 34 and the antenna 33. Minimize the loss and distortion of radio signal transmission. Correspondingly, the node may further include:

a second matching network, disposed between the wireless communication module 31 and the PA 34, for matching electrical characteristics of the wireless communication module 31 and the PA 34;

A third matching network, disposed between the PA 34 and the antenna 33, is used to match the electrical characteristics of the PA 34 and the antenna 33.

Specifically, the second matching network and the third matching network are all composed of devices such as capacitors and inductors. In general, the order of the matching network and the attenuation network in the transmit channel can be interchanged. Specifically, the output end of the first attenuation network 32 is connected to the PA 34 through the second matching network, or the output end of the wireless communication module 31 is connected to the first attenuation network 32 through the second matching network; The three matching network is connected to the antenna 33. If the antenna 33 also includes a Switch, the third matching network can be set between the PA34 and the Switch to match the electrical characteristics of the PA34 and the Switch. In addition, a matching network can be provided between the Switch and the antenna 33 for matching the electrical characteristics of the Switch and the antenna 33.

FIG. 3 is a schematic structural diagram of still another wireless communication node according to an embodiment of the present invention. As shown in FIG. 3, on the basis of the embodiment shown in FIG. 2, the wireless communication node further includes:

The second attenuation network 35 is disposed between the PA 34 and the antenna 33.

Assume that the output power of the wireless communication module 31 is Pchip, the target power range is {Paim}, the attenuation value of the first attenuation network 32 is A1, the attenuation value of the second attenuation network 35 is A2, and the maximum input power of the PA34 is Pin, PA34. The gain of G is PA, and the maximum output power of PA34 is Pout. In order to meet the maximum input power requirement of PA34, it should satisfy: Pchip-Al Pin. At the same time, in order to meet the target power requirement, if the output power of PA34 is not saturated, that is, the output power of PA34 is Pchip-Al+G <Pout, the input power of antenna 33 is Pchip-Al+G-A2, and Pchip-Al +G-A2e {Paim} ; If the output power of PA34 is saturated, that is, Pchip-Al+G Pout, the output power of PA34 is Pout, and the power of the second attenuation network 35 is Pout-A2, that is, antenna 33 The input power is Pout-A2, and Pout-A2e {Paim}

It can be seen that in the case where the output power of the PA34 is not saturated, in order to achieve the same goal Power, the greater the attenuation value of the first attenuation network 32, the higher the output power of the wireless communication module 31 can be. Further, by adjusting the device parameters of the first attenuation network 32, the attenuation value of the first attenuation network 32 is configured to increase the output power of the wireless communication module 31. Preferably, the output power of the wireless communication module 31 is configured to be saturated, that is, the wireless communication module 31 operates in a maximum output power state.

In addition, it can be seen that, in the case that the output power of the PA34 is not saturated, in order to achieve the same target power, the attenuation value of the second attenuation network 35 is larger, and the output power of the PA34 can be correspondingly increased, correspondingly, wireless communication The output power of module 31 can also be increased. Further, by adjusting the device parameters of the second attenuation network 35, the attenuation values of the second attenuation network 35 are configured to increase the output power of the wireless communication modules 31 and PA34. Preferably, the output power of the configuration PA is saturated, even if the output power of the PA34 is the maximum output power of the PA34.

Further, when the device parameters of the first attenuation network 32 are adjusted such that the output power of the wireless communication module 31 is saturated or nearly saturated, the input power of the antenna 33 reaches the maximum value of the target power, or the output power of the PA 34 is saturated. Or near saturation, the input power of the antenna 33 reaches the maximum value of the target power, so that when the output power of the wireless communication module 31 or the PA 34 is reduced, the input power of the antenna 33 can be ensured to be within the target power range as much as possible. . Optionally, the device parameters of the first attenuation network 32 are adjusted such that when the output powers of the wireless communication modules 31 and PA34 are both saturated or nearly saturated, the input power of the antenna 33 reaches a maximum of the target power.

Specifically, the second matching network and the third matching network are all composed of devices such as capacitors and inductors. In general, the order of the matching network and the attenuation network in the transmit channel can be interchanged. Specifically, the output end of the first attenuation network 32 is connected to the PA 34 through the second matching network, or wirelessly The output of the signal module 31 is connected to the first attenuation network 32 via the second matching network; the PA 34 is connected to the second attenuation network 35 via the third matching network, or the second attenuation network 35 passes the third matching The network is connected to the antenna 33.

If the antenna 33 also includes a Switch, the third matching network can be set between the PA34 and the Switch to match the electrical characteristics of the PA34 and the Switch. In addition, a matching network can be set between the Switch and the antenna 33 for matching the electrical characteristics of the Switch and the antenna 33.

FIG. 4 is a schematic structural diagram of still another wireless communication node according to an embodiment of the present invention. As shown in FIG. 4, on the basis of the embodiment shown in FIG. 1, the wireless communication node may further include: a PA 34 disposed between the output end of the wireless communication module 31 and the first attenuation network 32, and the wireless communication module 31. The output power is not greater than the maximum input power of the PA34.

Assume that the output power of the wireless communication module 31 is Pchip, the target power range is {Paim}, the attenuation value of the first attenuation network 32 is Al, the maximum input power of the PA34 is Pin, the gain of the PA34 is G, and the maximum output power of the PA34 is Pout, in order to meet the maximum input power requirement of PA34, should satisfy: Pchip Pin. In order to meet the target power requirement, if the output power of the PA34 is not saturated, that is, the output power of the PA34 is Pchip+G<Pout, the power attenuated by the first attenuation network 32 is Pchip+G-Al, that is, the input power of the antenna 33. Pchip+G-Al, and Pchip+G-Al e {Paim}; if the output power of PA34 is saturated, that is, Pchip+G^Pout is satisfied, and the output power of PA34 is Pout, then it is attenuated by the first attenuation network 32. The latter power is Pout-Al, that is, the input power of the antenna 33 is Pout-Al, and Pout-Al e {Paim}.

It can also be seen that, in the case that the output power of the PA 34 is not saturated, in order to achieve the same target power, the output power of the PA34 can be correspondingly increased as the attenuation value of the first attenuation network 32 is larger, and accordingly, the wireless communication module The output power of 31 can also be increased. Further, by adjusting the device parameters of the first attenuation network 32, the attenuation values of the first attenuation network 32 are configured to increase the output power of the wireless communication modules 31 and PA34. Preferably, the output power of the wireless communication module 31 is configured to be saturated, that is, the wireless communication module 31 operates in a maximum output power state.

Preferably, the output power of the configuration PA is saturated even if the output power of the PA34 is the maximum output power of the PA34.

Further, when the device parameters of the first attenuation network 32 are adjusted such that the output power of the wireless communication module 31 is saturated or nearly saturated, the input power of the antenna 33 reaches the target power. The maximum value, or, when the output power of the PA 34 is saturated or nearly saturated, the input power of the antenna 33 reaches the maximum value of the target power, so that when the output power of the wireless communication module 31 or the PA 34 is reduced, the antenna can be ensured as much as possible. The input power of 33 is within the target power range. Optionally, the device parameters of the first attenuation network 32 are adjusted such that when the output powers of the wireless communication module 31 and the PA 34 are both saturated or nearly saturated, the input power of the antenna 33 reaches a maximum value of the target power.

Specifically, the second matching network and the third matching network are all composed of devices such as capacitors and inductors. In general, the order of the matching network and the attenuation network in the transmit channel can be interchanged. Specifically, the PA is connected to the output end of the wireless communication module 31 through the second matching network; the output end of the first attenuation network 32 is connected to the antenna 33 through the third matching network, or the PA 34 passes the third A matching network is coupled to the first attenuation network 32. If the antenna 33 also includes a Switch, the third matching network can be set between the PA34 and the Switch to match the electrical characteristics of the PA34 and the Switch. In addition, a matching network can be provided between the Switch and the antenna 33 for matching the electrical characteristics of the Switch and the antenna 33.

The embodiment of the invention adopts a technical means for setting an attenuation network before the wireless communication module and the antenna, so that the output power of the wireless communication module can be set larger than in the case of no attenuation network, because the output power of the wireless communication module is greater due to the temperature. The smaller the impact, the smaller the total output power of the wireless communication node is affected by the temperature. Therefore, the embodiment of the present invention can reduce the influence of the temperature on the output power, and the scheme only needs to add the attenuation network and do some devices. Parameter adjustment, simple implementation and low cost. Further, the embodiment of the present invention can also adjust the device parameters of the attenuation network, so that the output power of the PA can be set larger than in the case of no attenuation network, and the smaller the output power of the PA is, the smaller the temperature is affected. Can be further Decreasing the total output power of the wireless communication node is affected by temperature.

FIG. 5 is a schematic diagram of an application scenario according to an embodiment of the present invention. As shown in Figure 5, the maximum output power of the Zigbee chip is MaxPchip, the target power range at the Switch is {Paim}, where the maximum value is MAX{Paim}, the gain of the PA is G, and the maximum output power of the PA is Pout, Pout. >MAX{Paim}, when the output of the PA is not saturated, that is, A>MaxPchip-Pout+G, the attenuation value A of the adjustment attenuation network satisfies: A=MaxPchip-MAX {Paim} +G , then the output of the Zigbee chip When the power is saturated and the output of the PA is not saturated, the target power maximum value MAX {Paim} is obtained at the Switch. Even if the target power maximum value MAX {Paim} is not needed at the Switch, the output power of the Zigbee chip and the PA in the scenario shown in Figure 5 can be larger than in the case of no attenuation network, thus reducing the output power of the Zigbee node (ie, The power at the switch is affected by the temperature.

FIG. 6 is a schematic diagram of still another application scenario according to an embodiment of the present invention. As shown in Figure 6, the maximum output power of the PA is Pout, and the target power range is {Paim}, where the maximum value is

Max {Paim}, the attenuation value of the attenuation network is A, and the attenuation value A of the attenuation network is adjusted to satisfy A= Pout-Max {Paim}. When the output power of the PA is saturated, that is, the maximum power Pout is output, it is obtained at the Switch. Target power maximum Max{Paim}. If the maximum output power of the Zigbee chip does not cause the input saturation of the PA, that is, the maximum output power of the Zigbee chip is not greater than the maximum input power of the PA, the Zigbee chip can also output at the maximum output power. For example, the maximum output power of the PA is 25 dbm, the gain of the PA is 20 dbm, and the maximum input power of the PA is 10 dBm. As long as the maximum output power of the Zigbee chip is between 5 dbm and lOdbm, the Zigbee chip can work. At the maximum output power, the output power of the PA is also saturated. Even if the target power maximum value MAX {Paim} is not needed at the Switch, the output power of the Zigbee chip and the PA in the scenario shown in Figure 6 can be larger than in the case of no attenuation network, thus reducing the output power of the Zigbee node by the temperature. Impact.

FIG. 7 is a schematic diagram of still another application scenario according to an embodiment of the present invention. As shown in Figure 7, the maximum output power of the Zigbee chip is MaxPchip, the attenuation value of the attenuation network 1 is Al, the gain of the PA is G, the maximum output power of the PA is Pout, the maximum input power of the PA is Pin, and the attenuation network 2 The attenuation value is A2, the target power range is {Paim}, and the maximum value is Max {Paim}, and the attenuation value A1 of the adjustment attenuation network 1 satisfies: Al ^MaxPchip-Pin, and

A 1 ^ MaxPchip-(Pout-G), adjust the attenuation value of the attenuation network 2 A2 to satisfy: A2= Pout- Max {Paim}, when the Zigbee chip and PA output at maximum power, get the target power max Max {Paim} at the Switch. Even if the target power maximum value MAX {Paim} is not required at the Switch, the output power of the Zigbee chip and the ΡΑ in the scene shown in Figure 7 can be larger than that without the fading network, thus reducing the output power of the Zigbee node by the temperature. Impact.

It should be noted that the above embodiments are only for explaining the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that: The technical solutions described in the foregoing embodiments are modified, or some of the technical features are equivalently replaced; and the modifications or substitutions do not deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

Claim

A wireless communication node, comprising:

a wireless communication module, a first attenuation network and an antenna;

2. The node of claim 1 wherein the attenuation value of the first attenuation network is configured to increase an output power of the wireless communication module.

3. The node of claim 2, wherein the output power of the wireless communication module is saturated.

4. The node according to claim 3, wherein the input power of the antenna is a maximum value of the target power.

The node according to any one of claims 1 to 4, further comprising: a first matching network, disposed between the output end of the wireless communication module and the antenna.

6. The node according to claim 1, further comprising:

a power amplifier disposed between the first attenuation network and the antenna;

The output power of the first attenuation network is not greater than the maximum input power of the power amplifier.

7. The node of claim 6, wherein the attenuation value of the first attenuation network is configured to increase an output power of the wireless communication module or the power amplifier.

8. The node according to claim 6 or 7, further comprising:

A second attenuation network is disposed between the power amplifier and the antenna.

9. The node of claim 8, wherein the attenuation value of the second attenuation network is configured to increase an output power of the wireless communication module and the power amplifier.

The node according to claim 1, further comprising:

And a power amplifier disposed between the output end of the wireless communication module and the first attenuation network, wherein an output power of the wireless communication module is not greater than a maximum input power of the power amplifier.

1 1. The node of claim 10, wherein the attenuation value of the first attenuation network is configured to increase an output power of the wireless communication module and the power amplifier.

12. The node according to claim 7, 9, and 11, wherein the wireless communication The output power of the letter module is saturated.

13. A node according to claim 7, 9, 11 or 12, characterized in that the output power of the power amplifier is saturated.

The node according to claim 12 or 13, wherein the input power of the antenna is a maximum value of the target power.

The node according to any one of claims 6 to 14, further comprising: a second matching network, disposed between an output end of the wireless communication module and the power amplifier;

A third matching network is disposed between the power amplifier and the antenna.

The node according to any one of claims 1 to 15, wherein the wireless communication module is a Zigbee chip, a wireless fidelity WiFi chip or a Bluetooth BT chip.