Simple technique for measuring source reflection coefficient while characterizing active devices

Madonna, G.; Ferrero, A.

doi:10.1109/22.982236

Cited by 7 publications

(3 citation statements)

References 11 publications

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“…By implementing this method and applying few basics signal flow graph rules the evaluation of complex equations can be greatly simplified. We have used this method to solve and simplify these equations using signal flow graph [14,15]. In general S 11 for DUC using VNA may be given by equation (4), where a 1 is incident wave and b 1 as reflected wave.…”

Section: Measurement Proceduresmentioning

confidence: 99%

Effective source mismatch uncertainty evaluation using resistive power splitter up to 18 GHz

Devi¹,

Ahmad²,

Patel³

et al. 2015

Int. J. Metrol. Qual. Eng.

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Abstract. CSIR-National Physical Laboratory (NPL) India is a National Metrology Institute (NMI), which disseminate traceability of the physical parameters in the country. In the field of microwave, it is one of the apex laboratories to provide traceability. In this paper, the method for precession measurement of effective source reflection coefficient using resistive power splitter and mismatch uncertainty evaluation are reported and discussed. Juroshek method is implemented in conjunction with Vector Network Analyzer (VNA) for mismatch uncertainty evaluation by measuring source reflection coefficient from measured S parameters. The measurement results and their associated uncertainty are presented and discussed from 1 MHz to 18 GHz of the resistive power splitter. The complex reflection coefficient of the effective source is determined using indigenously developed automation software. The method adopted is the most convenient way of measuring effective source reflection coefficient whose values are smaller than the manufacturer specs. The mismatch uncertainty has been improved, which is beneficial during the calibration of power sensors along with power meters.

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Section: Measurement Proceduresmentioning

confidence: 99%

Effective source mismatch uncertainty evaluation using resistive power splitter up to 18 GHz

Devi¹,

Ahmad²,

Patel³

et al. 2015

Int. J. Metrol. Qual. Eng.

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“…5) Γ S measurement mode. To perform real time Γ S measurements according to the method described in [7] SWT2 is set to excite the port b s of the input sampling head. The RF signal originates from the VNA and the receiver B is used.…”

Section: ) Small Signal Calibration and Measurement Modementioning

confidence: 99%

An extension of existing real-time load pull systems to perform voltage/current waveform reconstruction

Volokhine¹

2008

2008 71st ARFTG Microwave Measurement Conference

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A complete system to perform voltage/current waveform reconstruction during single-tone non-linear characterization of on-wafer devices including measurements of source reflection coefficients is presented. The solution is an extension of an existing real time active load pull system, which requires neither modification of the existing instruments nor a complicated calibration procedure or extra pre-characterization of components, thereby preserving all attractive features of the original system such as 100 dB dynamic range. The extension is relatively simple requiring only two comb generators and one additional calibration step to provide a spectacular enhancement of on-wafer characterization capability of non-linear devices.Index Terms-Time domain waveforms, microwave measurements, time-domain measurements, load-pull/sourcepull, voltage/current waveforms.

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“…In [4], a simple yet fairly accurate load-source pull test scheme is proposed to measure the reflection coefficient of a device.…”

Section: Introductionmentioning

confidence: 99%

Transmission coefficient estimation based on power measurements using a hybrid coupler

Chu

Liao

2011

2011 IEEE International Conference on Microwave Technology &Amp; Computational Electromagnetics

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In this work, we attempt to develop a method that measures the transmission coefficient of a microwave device. This method combines a simple microwave circuitry and a signal processing algorithm. The measurement apparatus includes a signal source, a directional coupler, a 180 degree hybrid coupler and two power detectors. Though only magnitudes of transmitted power are measured, the phase information of the device-under-test can be estimated via signal processing techniques in conjunction with known knowledge about the measurement system. Preliminary measurement results demonstrate that the proposed method can acquire results similar to the ones measured from a network analyzer. The system is particularly attractive since the overall cost is very inexpensive comparing to the network analyzer.Index Terms-transmission coefficient, hybrid coupler, power detector, microwave component measurement.

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Simple technique for measuring source reflection coefficient while characterizing active devices

Cited by 7 publications

References 11 publications

Effective source mismatch uncertainty evaluation using resistive power splitter up to 18 GHz

Effective source mismatch uncertainty evaluation using resistive power splitter up to 18 GHz

An extension of existing real-time load pull systems to perform voltage/current waveform reconstruction

Transmission coefficient estimation based on power measurements using a hybrid coupler

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