High-power intermodulation distortion detection device and method

A technology of intermodulation distortion and detection devices, which is applied in the direction of improving amplifiers to reduce nonlinear distortion, etc., can solve the problems of unfavorable mass production, high cost, and increased cost, and achieve good operation selectivity, reduce production costs, and reduce usage. Effect

Inactive Publication Date: 2015-02-18
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the price of RF source cards is very expensive, and the use of multiple RF source cards will increase the corresponding cost, which is not conducive to mass production. Therefore, those skilled in the art need to solve the problem of high cost caused by using more RF source cards for testing

Method used

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  • High-power intermodulation distortion detection device and method
  • High-power intermodulation distortion detection device and method
  • High-power intermodulation distortion detection device and method

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Embodiment 1

[0027] Please refer to figure 2, in this embodiment, a high-power intermodulation distortion detection device is proposed, including: a detection device 100 and a detection circuit, and the device under test 500 is connected to the detection device 100 through the detection circuit. Among them, RF source card and arbitrary waveform generator AWG are arranged in testing equipment 100, and testing equipment 100 can be 93K testing equipment, and multiple RF source cards can be inserted inside it, and be provided with multiple function cards, arbitrary waveform generator AWG It is a kind of function card. Among them, in this embodiment, the detection device 100 is inserted with two RF source cards, which are the RF signal transmission source card S1 and the RF signal reception source card S2, wherein the RF signal transmission source card S1 is used to send the carrier signal, and the RF signal The receiving source card S2 is used to receive the intermodulation distortion signal...

Embodiment 2

[0039] Please refer to Figure 4 , in this embodiment, the proposed high-power intermodulation distortion detection device also includes a detection device 100 and a detection circuit. Signal. In addition, the detection circuit also includes a power divider 700 on the basis of Embodiment 1. The power divider 700 is connected between the attenuator 600 and the detection device 100, and it is used to divide the two-tone signal and the intermodulation distortion signal into two branches. One branch is directly connected with the RF signal comparison source card S3 in the detection device for signal comparison and analysis, and the other branch is connected with the RF signal receiving source card S2 in the detection device through the second filter 320 for use in for analyzing intermodulation distortion signals. The rest of the components are the same as those in Embodiment 1. For details, please refer to Embodiment 1, which will not be repeated here.

[0040] In addition, in ...

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Abstract

The invention discloses a high-power intermodulation distortion detection device and method. The device comprises detection equipment and a detection loop, wherein a device to be detected is connected with the detection equipment through the detection loop; an RF source card and an any waveform generator (AWG) are arranged in the detection equipment; the detection loop comprises a power amplifier, first and second filters and an attenuator. The method comprises the following steps: emitting an I/Q (in-phase/quadrature) modulation signal by the AWG, emitting a carrier wave signal by the RF source card, and loading the I/Q modulation signal into the carrier wave signal to obtain a dual-tone signal for detecting intermodulation distortion. According to the high-power intermodulation distortion detection device and method, the purpose of forming the dual-tone signal by the RF source card can be achieved by emitting the carrier wave signal by only one RF source card, so that the use frequency of the RF source card is reduced and the production cost is reduced; further, the bandwidth and power of the dual-tone signal can be determined by the I/Q modulation signal emitted by the AWG, the dual-tone signal with the same power and relatively large bandwidth can be generated, and the dual-tone signal with relatively small bandwidth and different power also can be generated, so that relatively good operation selectivity is achieved.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a high-power intermodulation distortion detection device and detection method. Background technique [0002] In a wireless communication system, especially a radio frequency front-end circuit, there are often nonlinear non-idealities. Intermodulation Distortion (IMD for short) refers to the sum and difference distortion of an input signal introduced by an amplifier. When the input end of the wireless communication system receives external interference, especially there are two or more interference signals of different frequencies at the same time. After the interference signal is affected by the nonlinearity of the system itself, an intermodulation component is generated. If the frequency of the intermodulation component is similar to the target signal, it will interfere with the target signal, causing difficulty in demodulation and reducing the sensitivity of the syste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/32
Inventor 王磊张金艺
Owner SHANGHAI UNIV
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