Unlock instant, AI-driven research and patent intelligence for your innovation.

A load-pull test method for divided frequency bands

A technology of load pulling and testing methods, which is applied in the direction of measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as the inability to tune the harmonic impedance of ultra-wideband amplifiers, and achieve the best performance effect

Active Publication Date: 2019-04-05
CHENGDU HIWAFER SEMICON CO LTD
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a load-pull test method for sub-frequency bands, which can well solve the problem that the traditional load-pull test method cannot tune the harmonic impedance of the ultra-wideband amplifier

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A load-pull test method for divided frequency bands

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. For simplicity, some technical features known to those skilled in the art are omitted from the following description.

[0018] Such as figure 1 As shown, this embodiment provides a frequency-divided load-pull test method, which is suitable for load-pull testing of ultra-wideband radio frequency microwave amplifiers with more than one octave band, and applicable device types include GaN HEMT, Si LDMOS, GaAs pHEMT, etc. The present invention will take a GaN HEMT ultra-broadband high-efficiency power amplifier load-pull test as an example. The operating frequency band of the amplifier is 0.2GHz to 3GHz, and the device model used is Cree CGH40010. The solution includes the following steps:

[0019] S1, divide the operating frequency band o...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a frequency-division section load traction testing method comprising the following steps: S1, dividing an ultra-wideband amplifier work frequency band into a first frequency band, a second frequency band and a third frequency band, wherein the dividing rules are fL<=the first frequency band<fH / 3, fH / 3<=the second frequency band<fH / 2, fH2<=the third frequency band <=fH; S2, determining whether the present lowest frequency band width is bigger than an octave or not; S3, if yes, sub-dividing the present lowest frequency band into 3 sub-bands according to the dividing rules in S1, and repeating S2; S4, if not, carrying out step 5; S5, respectively selecting testing frequency points needing load traction from the divided N frequency bands according to the amplifier work frequency band width; S6, carrying out load traction tests for each testing frequency point, thus obtaining the performance optimum impedance point of the amplifier in each frequency band; S7, obtaining the optimum impedance point of a transistor in the whole ultra wide band according to the performance optimum impedance point in each frequency band.

Description

technical field [0001] The invention belongs to the technical field of radio-frequency microwave testing, and in particular relates to a load-pull testing method for divided frequency bands. Background technique [0002] Load-pull test data of RF microwave transistors are often used to design power amplifier circuits or verify the accuracy of transistor nonlinear models. The so-called load pull refers to tuning the input and output impedance of the transistor through a mechanical or electronic impedance tuner to obtain the transistor performance, such as power gain, output power, efficiency, etc., with the change relationship of the input and output impedance points, so as to find the transistor Impedance point for best performance. [0003] In the communication system application, the efficiency of the amplifier is very high. When designing a high-efficiency power amplifier, the working mode of the switching amplifier is often used, such as F class, J class, etc. The worki...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 陈勇波
Owner CHENGDU HIWAFER SEMICON CO LTD