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Method and apparatus for detecting open circuit fault of transmitter

A technology of open-circuit fault and detection method, which is applied in the field of communication, can solve the problems of complex circuit, low reliability and high cost, and achieve the effect of simple circuit, strong anti-interference and low cost

Active Publication Date: 2008-02-06
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The existing technology detects the RF forward power and RF reverse power, and compares the forward power and reverse power to confirm whether the connector is connected properly. At least one RF coupler, two RF detectors and a comparator, the cost is high, the circuit is complicated, and the reliability is not high

Method used

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  • Method and apparatus for detecting open circuit fault of transmitter
  • Method and apparatus for detecting open circuit fault of transmitter

Examples

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Comparison scheme
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Embodiment 1

[0034] The method of electric parameter detection is adopted in the first embodiment, the detection circuit is simple, the cost is low, and the reliability is strong.

[0035] In Embodiment 2 of the present invention, a transmitter open circuit fault detection device is provided:

[0036] Taking the detection of the DC resistance to ground at the output of the power amplifier in the transmitter as an example, the open circuit fault detection device can be designed with a DC feed network, and its internal circuit schematic diagram is shown in Figure 3:

[0037] V1 is the working voltage power supply port of the open circuit fault detection device. One end of capacitor C1 and capacitor C2 is connected to V1, and the other end is grounded; one end of resistor R1 is connected to V1, the other end is connected to the base of transistor T1, one end of resistor R2 is connected to V1, and the other end is connected to transistor The collector of T1; P1 is the alarm signal output termi...

Embodiment 3

[0060] The radio frequency transmitter provided by Embodiment 3 has an open-circuit fault detection function. When an open-circuit fault occurs, it can alarm and automatically turn off the power of the power amplifier to prevent the transmitter from being burned. The reliability is high and the cost is low.

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PUM

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Abstract

The present invention discloses a method for detecting fault in open circuit of transmitter and a device and a transmitter which has the open fault measuring function. The transmitter open fault measuring method comprises the follow steps: the ground electric parameter of the output end of the transmitter internal power amplifier is measured; and the transmitter has open fault if the measured ground electric parameter is higher than the default threshold value. The transmitter open fault measuring device comprises an open fault measuring module and a ground electric parameter which is used for measuring the output end of the transmitter internal power amplifier and outputting the open fault alarming signal or corresponding control signal if the measured ground electric parameter is higher than the default threshold value. The present invention simplifies the design of the transmitter open fault measuring device and decreases the production cost. Besides, the present invention increases anti-interference performance of the measuring device.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for detecting an open circuit fault of a transmitter. Background technique [0002] In a mobile communication system, a radio frequency transmitter is used to amplify and transmit a radio frequency signal into space, and has strict requirements on its quality and stability, so its manufacturing cost is relatively high. [0003] The RF transmitter usually consists of an up-conversion, RF small-signal amplifier, RF high-power amplifier, duplexer or combiner, and antenna. The radio frequency power amplifier and the duplexer or combiner are connected by cables. If the connecting cable falls off or disconnects when the transmitter is working, the high-power radio frequency signal that should have been transmitted into the space will be reflected back to the transmitter by the connector, causing the transmitter to burn out. [0004] In order to avoid the oc...

Claims

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Application Information

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IPC IPC(8): H04B1/04G01R31/02
Inventor 李玉林殷为民张希坤孙捷孙益军孙益平
Owner HUAWEI TECH CO LTD