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Loopback detection device and method

A loopback detection and port technology, applied in the field of communication, can solve the problems of low reliability and high cost, and achieve the effect of high reliability and low cost

Inactive Publication Date: 2011-07-27
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] A single or multiple coupling holes are opened between the two filter channels of the duplexer to achieve loopback detection, which requires devices such as circulators and isolators, which are expensive, and due to the structural characteristics of the circulator itself, a large volume is required , and the reliability is not high

Method used

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  • Loopback detection device and method

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Embodiment 1

[0030] This embodiment provides a loopback detection device, see figure 1 , the device consists of:

[0031] The first port 101, the first filter channel 102, the antenna port 103, the second filter channel 104, and the second port 105 connected in sequence; the first filter channel 102 includes a first resonant cavity and a second resonant cavity, the There are at least three resonant cavities between the first resonant cavity and the second resonant cavity, and there is a coupling hole between the first resonant cavity and the second resonant cavity.

[0032] Optionally, the second filter channel 104 includes a third resonant cavity and a fourth resonant cavity, at least three resonant cavities are included between the third resonant cavity and the fourth resonant cavity, and the third resonant cavity and the fourth resonant cavity There is a coupling hole between them.

[0033] Correspondingly, the first port 101 is a transmitting port, and the second port 105 is a receiv...

Embodiment 2

[0045] This embodiment provides a loopback detection device, which is different from the prior art. In the prior art, a coupling hole is opened between the two filter channels of the duplexer, and structures and devices such as a circulator and a load are added according to the principle of a four-port coupler to realize the loopback detection function, and the signal of the loopback detection is avoided. Open the filter at the transmitting end, send from the coupling hole to the filter at the receiving end, and then reach the receiving end. However, the loopback detection device provided by the present invention does not need to add other devices, and adopts the mode of opening a coupling hole between the resonant cavities of the filter channel to change the performance of the filter, so that the received frequency band signal of the opposite port can pass through the filter. , so as to achieve loopback detection. A loopback detection system such as figure 2 as shown, fi...

Embodiment 3

[0063] see Figure 7 , this embodiment provides a loopback detection method, which is implemented by using the loopback detection devices in the first and second embodiments above, which is different from the prior art. In the prior art, the loopback detection signal avoids the filter at the transmitting end, is sent to the filter at the receiving end through the coupling hole opened between the two filter channels of the duplexer, and then reaches the receiving end. However, the method provided by the present invention changes the performance of the filter by opening a coupling hole between the resonant cavities of the filter channel, so that the received frequency band signal of the opposite port can pass through the filter, thereby realizing loopback detection. The method flow is as follows:

[0064] 701: Open a coupling hole between the first resonant cavity and the second resonant cavity of the first filter channel, including at least three resonant cavities between the ...

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Abstract

The invention discloses a loopback diction device and method, belonging to the communication field. The device comprises a first port, a first filter channel, an antenna port, a second filter channel and a second port which are connected in sequence; the filter channel comprises a first resonant cavity and a second resonant cavity; at least three resonant cavities are contained between the first resonant cavity and the second resonant cavity; and one coupling hole is arranged between the first resonant cavity and the second resonant cavity. According to the invention, the coupling hole is arranged between the first resonant cavity and the second resonant cavity of the first filter channel, so that frequency range signals of the second port can pass through the first filter channel, thus realizing the loopback detection. In the technical scheme of the invention, since only one coupling hole is needed to be arranged between the resonant cavities in a duplexer, the cost is low, and the duplexer in the structure has higher reliability in the process of loopback detection.

Description

technical field [0001] The invention relates to the communication field, in particular to a loopback detection device and method. Background technique [0002] In the field of communication, in order to ensure that the communication equipment can receive and transmit signals normally, the function detection of the communication equipment is often performed through loopback detection, that is, through the form of self-sending and self-receiving, to detect whether the communication equipment can receive and transmit signals normally. [0003] When implementing loopback detection in the prior art, coupling between two filter channels of a duplexer is adopted, that is, a single or multiple coupling holes are opened between the TX (Transmission, sending) path and the RX (Receiver, receiving) path, and According to the principle of four-port coupler, the structure and devices such as circulator and load are added to realize the loopback detection function. [0004] In the process...

Claims

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Application Information

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IPC IPC(8): H04L12/26
CPCH01P1/207H01P1/2138H04B7/00
Inventor 杨晓维田涛赵青张明旭
Owner HUAWEI TECH CO LTD
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