Electronic equipment for air interface power detection

Abstract

The utility model discloses an electronic device for air interface power detection, which comprises a shell, a main board and an auxiliary board are arranged in the shell, and a first coaxial seat, a processor and a power amplifier circuit are arranged on the main board; a second coaxial seat, a detection circuit and an antenna are arranged on the auxiliary plate; the first coaxial seat is connected with a processor through a power amplifier circuit, the second coaxial seat is connected with an antenna through a detection circuit, and the processor is connected with the detection circuit; when a conduction test is carried out, the first coaxial seat is externally connected with an instrument and is disconnected with the second coaxial seat, and the detection circuit outputs a detection signal of a first level to the processor; during wireless testing, the first coaxial seat is in wired connection with the second coaxial seat, and the detection circuit outputs a detection signal of a second level to the processor; and the processor judges the current test state according to the level of the detection signal. The state is judged completely according to whether the coaxial lines are connected or not, the situation of misjudgment is avoided, and the accuracy of state judgment is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic technical field, especially is a kind of electronic equipment of air interface power detection. BACKGROUND

[0002] Air interface power detection refers to the process of measuring and monitoring the actual transmit power of wireless communication equipment at the air interface (i.e., air interface). During specific detection, a test seat (Conductive test seat) needs to be set up, the internal structure of which is shown in Figure 1 The test seat is connected to the mainboard at one end and connected to the subboard at the other end (the end where the triangular contact is located) and outputs an interrupt signal (transmitted through the cable) to the CPU. The default state of the test seat is on, allowing the mainboard and the subboard to be connected through the test seat to transmit the signal, which is in a wireless state at this time. To transmit the signal, the interrupt signal is pulled down to low by the device on the subboard. When conducting the test, the top pin of the external cable (cable TV cable) will press the test seat internal spring to the dotted line, the test seat will be disconnected, the mainboard and the subboard will be disconnected, and the interrupt signal will be pulled up to high.

[0003] The CPU (central processing unit) detects that the interrupt signal it receives is high, indicating that it is currently in a conductive state; if it is low, it indicates that it is currently in a wireless state. Then, the CPU calls the corresponding RF gain table stored in the memory according to the different states, i.e., the corresponding maximum transmit power (max power) can be obtained, and the radio frequency transceiver is controlled to transmit the signal at the maximum transmit power.

[0004] If the spring in the test seat loses its elasticity over a long period of use, it may not return to its original position (contact with the contact) after being released, which may cause the default on state to be unstable. This cannot completely ensure that the mainboard and the subboard are disconnected, and the level of the interrupt signal may be between the set high and low levels, making it impossible for the CPU to determine which level the interrupt signal is at, which may result in misjudgment and failure to obtain accurate maximum transmit power for transmission.

[0005] Therefore, the prior art needs to be improved and enhanced. UTILITY MODEL CONTENT

[0006] In view of the above shortcomings of the prior art, the utility model aims to provide an electronic device for air interface power detection to solve the problem that the existing test seat may cause the CPU to misjudge the current state when the spring fails.

[0007] In order to achieve the above object, the utility model adopts the following technical scheme:

[0008] An air interface power detection electronic device, including a casing, wherein, the casing is equipped with mainboard and vice board, be equipped with first coaxial seat, processor and power amplifier circuit on the mainboard, be equipped with second coaxial seat, detection circuit and antenna on the vice board, first coaxial seat is connected processor through power amplifier circuit, second coaxial seat is connected antenna through detection circuit, and processor connects detection circuit,

[0009] When conducting test, the first coaxial seat is connected with the second coaxial seat, and the detection circuit outputs the second level detection signal to the processor, the processor judges the current test state according to the level of the detection signal, and also outputs the signal to be transmitted to the power amplifier circuit for amplification, and then is transmitted to the antenna for emission in turn through the first coaxial seat, the second coaxial seat and the detection circuit.

[0010] When conducting test, the first coaxial seat is connected with the second coaxial seat, and the detection circuit outputs the second level detection signal to the processor, the processor judges the current test state according to the level of the detection signal, and also outputs the signal to be transmitted to the power amplifier circuit for amplification, and then is transmitted to the antenna for emission in turn through the first coaxial seat, the second coaxial seat and the detection circuit.

[0011] The air interface power detection electronic device, wherein the first coaxial seat is connected with the second coaxial seat through a coaxial line.

[0012] The air interface power detection electronic device, wherein the mainboard is provided with a first capacitor and a first inductor, one end of the first capacitor is connected with one end of the first inductor and the second pin of the first coaxial seat, the other end of the first capacitor is connected with the power amplifier circuit, the other end of the first inductor is grounded, the first pin, the third pin and the fourth pin of the first coaxial seat are connected with each other and grounded.

[0013] The air interface power detection electronic device, wherein the detection circuit comprises a first resistor, a second resistor and a second capacitor.

[0014] One end of the first resistor is connected with one end of the second capacitor and the second pin of the second coaxial seat, the other end of the second capacitor is connected with the antenna, the other end of the first resistor is connected with one end of the second resistor and the interrupt detection pin of the processor, the other end of the second resistor is connected with the power supply end, the first pin, the third pin and the fourth pin of the second coaxial seat are connected with each other and grounded.

[0015] The air interface power detection electronic device, wherein the detection circuit further comprises a third resistor, a second inductor and a third inductor.

[0016] One end of the third resistor is connected with the antenna and one end of the second inductor, the other end of the third resistor is connected with one end of the third inductor and the other end of the second capacitor, the other end of the second inductor and the other end of the third inductor are grounded.

[0017] The first resistor has a resistance of 10KΩ, and the second resistor has a resistance of 100KΩ.

[0018] The first capacitor is a bypass capacitor.

[0019] The second capacitor has a capacitance of 33pF.

[0020] Compared with the prior art, the electronic equipment for air interface power detection provided by the utility model, including a shell, the shell is equipped with mainboard and vice board, the mainboard is equipped with first coaxial seat, processor and power amplifier circuit, the vice board is equipped with second coaxial seat, detection circuit and antenna, the first coaxial seat is connected with processor through power amplifier circuit, second coaxial seat is connected with antenna through detection circuit, and processor is connected with detection circuit, when conducting test, the first coaxial seat is connected with instrument and is disconnected with second coaxial seat, and the detection circuit outputs first level detection signal to processor, when wireless test is carried out, the first coaxial seat is connected with second coaxial seat, and the detection circuit outputs second level detection signal to processor, the processor judges the current test state according to the level of detection signal, and also outputs the signal to be transmitted to power amplifier circuit, amplifies, and then is transmitted to antenna for emission in turn through first coaxial seat, second coaxial seat and detection circuit, the state is judged according to whether the coaxial line is connected or not, so that the misjudgment does not occur, and the accuracy of state judgment is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is the internal structure diagram of the prior test seat.

[0022] Figure 2 It is the structure schematic view of the electronic equipment provided by the utility model when conducting test.

[0023] Figure 3 It is the structure schematic view of the electronic equipment provided by the utility model when conducting wireless test.

[0024] Figure 4 It is the circuit diagram of the mainboard in the electronic equipment provided by the utility model.

[0025] Figure 5 It is the circuit diagram of the vice board in the electronic equipment provided by the utility model. DETAILED DESCRIPTION

[0026] This utility model provides an electronic device for air interface power detection. To make the objectives, technical solutions, and advantages of this utility model clearer and more explicit, the following detailed description, with reference to the accompanying drawings and embodiments, further illustrates the utility model. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this utility model.

[0027] Please also refer to Figures 2 to 5 The present invention provides an electronic device for air interface power detection, comprising a housing, wherein a main board 100 and a sub-board 200 are provided inside the housing. The main board 100 is provided with a first coaxial connector J1, a processor 110 and a power amplifier circuit 120; the sub-board 200 is provided with a second coaxial connector J2, a detection circuit 210 and an antenna AT1; the first coaxial connector J1 is connected to the processor 110 through the power amplifier circuit 120, the second coaxial connector J2 is connected to the antenna AT1 through the detection circuit 210, and the processor 110 is connected to the detection circuit 210 (via a ribbon cable).

[0028] When performing conduction tests, such as Figure 2 As shown, the first coaxial connector J1 is connected to an external instrument and disconnected from the second coaxial connector J2. The detection circuit 210 outputs a first-level detection signal to the processor 110. During wireless testing, as... Figure 3 As shown, the first coaxial connector J1 and the second coaxial connector J2 are connected by a wire. The detection circuit 210 outputs a detection signal of the second level to the processor 110. The processor 110 determines the current test state based on the level of the detection signal and also outputs the signal to be transmitted to the power amplifier circuit 120 for amplification. The signal is then transmitted to the antenna AT1 for transmission through the first coaxial connector J1, the second coaxial connector J2, and the detection circuit 210 in sequence.

[0029] Depending on the connection / disconnection status of the first coaxial connector J1 and the second coaxial connector J2 under different test conditions, the corresponding level of the generated detection signal will be different, which can determine the current test state and realize the automatic triggering of air interface power detection. This is suitable for electronic devices with weak signals and requiring high transmission power.

[0030] Taking a mobile phone as an example, the motherboard 100 houses most of the circuitry for the phone's functions (such as the CPU, MCU, and RF circuitry), typically located in the upper middle part of the casing. The sub-board 200 houses a smaller number of functional components (such as a USB port, earphone, and antenna), usually located at the bottom of the casing. The first coaxial connector J1 on the motherboard and the second coaxial connector J2 on the sub-board are cable connectors. Pins 1, 3, and 4 are ground (GND), and pin 4 is the signal (SIN). J1 and J2 are connected by a wire, meaning the first coaxial connector J1 is connected to the second coaxial connector J2 via a coaxial cable 300.

[0031] The circuit structure of the processor 110 and the power amplifier circuit 120 and the connection relationship therebetween are prior art and are not described in detail here. The processor 110 is preferably a CPU of model MT6855, and the interrupt detection pin EINT20 (AP16) thereof is used to receive the detection signal in this embodiment.

[0032] As shown in Figure 3 , the first capacitor C1 and the first inductor L1 are arranged near the first coaxial seat J1 on the mainboard 100; one end of the first capacitor C1 is connected to one end of the first inductor L1 and the second pin of the first coaxial seat J1, the other end of the first capacitor C1 is connected to the output end of the power amplifier circuit 120, and the other end of the first inductor L1 is grounded; the first pin, the third pin and the fourth pin of the first coaxial seat J1 are connected to each other and grounded.

[0033] The first capacitor C1 (preferably 33 pF) and the first inductor L1 (preferably 68 nH) are arranged adjacent to the first coaxial seat J1. The power amplifier circuit 120 outputs the amplified transmission signal RF ANT1 MHB TRX to the first coaxial seat J1. The bypass function of the first capacitor C1 (bypass capacitor) can filter out high-frequency noise, and the decoupling function can reduce external interference. The first inductor L1 has the function of blocking alternating current and direct current, which can maintain the purity and efficiency of the transmission signal, and make the transmitted transmission signal RF ANT1 MHB TRX more stable.

[0034] As shown in Figure 4 , the detection circuit 210 includes a first resistor R1, a second resistor R2 and a second capacitor C2; one end of the first resistor R1 is connected to one end of the second capacitor C2 and the second pin of the second coaxial seat J2, the other end of the second capacitor C2 is connected to the antenna AT1, the other end of the first resistor R1 is connected to one end of the second resistor R2 and the interrupt detection pin of the processor, the other end of the second resistor R2 is connected to the power supply end (providing a power supply voltage VIO18 PMU of 1.8 V); the first pin, the third pin and the fourth pin of the second coaxial seat J2 are connected to each other and grounded.

[0035] Among them, the capacitance of the second capacitor C2 is preferably 33 pF, the resistance of the first resistor R1 is preferably 10 KΩ, and the resistance of the second resistor R2 is preferably 100 KΩ. In this embodiment, 1.5 V-1.8 V is set as high level (High), and 0 V-0.3 V is set as low level (LOW), and the principle of state detection is:

[0036] During the conductive test, as shown in Figure 2As shown, based on the need to use the first coaxial seat J1 to connect the instrument for testing, the first coaxial seat J1 and the second coaxial seat J2 are disconnected at this time, and the supply voltage VIO18_PMU charges C2 through R2 and R1, and the detection signal DETECT_GPIO is pulled high at this time. The detection signal DETECT_GPIO is transmitted to the interrupt detection pin of the processor, and the processor detects the high level to determine that the current is in the conductive state.

[0037] In the wireless test, the first coaxial seat J1 is connected with the second coaxial seat J2 through the coaxial line 300. At this time, the detection signal DETECT_GPIO passes through the first resistor R1, the second coaxial seat J2, the coaxial line 300, the first coaxial seat J1, and the first inductor L1 to the ground in sequence; causing the detection signal DETECT_GPIO to be pulled low. The voltage Vdetect on the detection signal DETECT_GPIO is specifically: Vdetect=1.8V×r1 / (r1+r2)≈0.16V, r1 represents the resistance of the first resistor R1, and r2 represents the resistance of the second resistor R2. Vdetect is low, which means that the current is in the wireless state.

[0038] Whether the first coaxial seat J1 and the second coaxial seat J2 are connected through the coaxial line determines the high and low levels of the detection signal DETECT_GPIO. By detecting the connection state of the coaxial line, it can be determined whether the current is in the conductive state or the wireless state. The coaxial line is not connected, which is the conductive state, and the coaxial line is connected, which is the wireless state.

[0039] By judging the corresponding state through the connection of the coaxial line, the actual application scenario can be better met. Because, in the conductive test, the first coaxial seat J1 needs to be connected with the instrument, and the coaxial line must not be connected. In the wireless test, in order to transmit the signal of the antenna AT1 on the sub-board 200 to the main board 100, the first coaxial seat J1 and the second coaxial seat J2 must be connected through the coaxial line. In this way, the connection state of the coaxial line of the main board and the sub-board can trigger the air interface power detection on the main board, that is, the processor calls the maximum transmit power in the radio frequency gain table according to the conductive state or the wireless state, and controls the radio frequency transceiver to transmit signals at the maximum transmit power.

[0040] Preferably, the detection circuit further comprises a third resistor R3, a second inductor L2 and a third inductor L3; one end of the third resistor R3 is connected to the antenna AT1 and one end of the second inductor L2, the other end of the third resistor R3 is connected to one end of the third inductor L3 and the other end of the second capacitor C2, and the other end of the second inductor L2 and the other end of the third inductor L3 are both grounded.

[0041] The third resistance R3, the second inductance L2 and the third inductance L3 constitute a matching circuit of the antenna.

[0042] To sum up, the electronic device for air interface power detection can judge the current test state according to the different levels of the detection signals generated by the different connection and disconnection states of the first coaxial seat and the second coaxial seat under different test states, and automatic triggering of the air interface power detection is realized.

[0043] It should be understood that the application of the utility model is not limited to the above examples, and all these improvements and changes should belong to the protection scope of the utility model claims attached.

Claims

1. An electronic device for over-the-air power detection, comprising a housing, characterized in that, The housing contains a main board and a sub-board. The main board has a first coaxial connector, a processor, and a power amplifier circuit. The sub-board has a second coaxial connector, a detection circuit, and an antenna. The first coaxial connector is connected to the processor through the power amplifier circuit, the second coaxial connector is connected to the antenna through the detection circuit, and the processor is connected to the detection circuit. During conduction testing, the first coaxial connector is connected to an external instrument and disconnected from the second coaxial connector, and the detection circuit outputs a first-level detection signal to the processor; During wireless testing, the first coaxial connector and the second coaxial connector are connected by a wire. The detection circuit outputs a detection signal of the second level to the processor. The processor determines the current test status based on the level of the detection signal and also outputs the signal to be transmitted to the power amplifier circuit for amplification. The signal is then transmitted to the antenna for transmission through the first coaxial connector, the second coaxial connector, and the detection circuit in sequence.

2. The electronic device for air interface power detection according to claim 1, characterized in that, The first coaxial seat is connected to the second coaxial seat via a coaxial line.

3. The electronic device for air interface power detection according to claim 2, characterized in that, The motherboard is provided with a first capacitor and a first inductor; one end of the first capacitor is connected to one end of the first inductor and pin 2 of the first coaxial connector, the other end of the first capacitor is connected to the power amplifier circuit, and the other end of the first inductor is grounded; pins 1, 3 and 4 of the first coaxial connector are connected to each other and grounded.

4. The electronic device for air interface power detection according to claim 3, characterized in that, The detection circuit includes a first resistor, a second resistor, and a second capacitor; One end of the first resistor is connected to one end of the second capacitor and pin 2 of the second coaxial connector. The other end of the second capacitor is connected to the antenna. The other end of the first resistor is connected to one end of the second resistor and the interrupt detection pin of the processor. The other end of the second resistor is connected to the power supply. Pins 1, 3 and 4 of the second coaxial connector are interconnected and grounded.

5. The electronic device for air interface power detection according to claim 4, characterized in that, The detection circuit also includes a third resistor, a second inductor, and a third inductor; One end of the third resistor is connected to the antenna and one end of the second inductor, and the other end of the third resistor is connected to one end of the third inductor and the other end of the second capacitor. The other ends of the second inductor and the third inductor are both grounded.

6. The electronic device for air interface power detection according to claim 4, characterized in that, The first resistor has a resistance of 10KΩ and the second resistor has a resistance of 100KΩ.

7. The electronic device for air interface power detection according to claim 3, characterized in that, The first capacitor is a bypass capacitor.

8. The electronic device for air interface power detection according to claim 4, characterized in that, The capacitance of the second capacitor is 33pF.

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