A time-domain large-signal measurement setup

Arthaber, Holger; Mayer, Markus; Gafni, A.; Gadringer, Michael Ernst; Magerl, Gottfried

doi:10.1002/mmce.20041

Cited by 7 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experience from other measurement setups has shown that a 10 MHz link between RF-sources does not warrant a perfectly stable phase-relationship. A slow drift of some degrees around the ideal phase can still be observed [8]. Because this setup needs very high precision to not influence ACPR, EVM, etc.…”

Section: B Source Synchronizationmentioning

confidence: 91%

See 1 more Smart Citation

An active load-pull setup for broadband signals using digital baseband processing for the active loop

Arthaber¹,

Mayer²,

Magerl³

2008

Int J RF and Microwave Comp Aid Eng

Self Cite

View full text Add to dashboard Cite

An active load-pull system for broadband signals is presented. The forward traveling output signal of the device under test (DUT) is demodulated to an intermediate frequency (IF), digitized, processed in digital baseband, up-converted again, and injected as the backward traveling wave. By using periodic signals and sampling of exactly the entire period in a fully synchronous setup, it is possible to correct the frequency response over the entire measurement bandwidth and to compensate timing delays with minimum mathematical effort. In contrary to active load pull systems with closed-loops the proposed setup can perfectly compensate all errors and maintain a constant phase over the entire bandwidth of the broadband signal. Therefore, no signal distortion will occur and parameters like adjacent channel power ratio (ACPR), error vector magnitude (EVM), etc. can be measured accurately.

show abstract

Section: B Source Synchronizationmentioning

confidence: 91%

“…A slow drift of some degrees around the ideal phase can still be observed [8]. Because this setup needs very high precision to not influence ACPR, EVM, etc.…”

Section: B Source Synchronizationmentioning

confidence: 95%

An active load-pull setup for broadband signals using digital baseband processing for the active loop

Arthaber¹,

Mayer²,

Magerl³

2008

Int J RF and Microwave Comp Aid Eng

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Active Harmonic Load Pull Measurement Setupmentioning

confidence: 99%

Design of a current mode class-D RF amplifier using load pull techniques

Schuberth

Singerl

Arthaber

et al. 2009

2009 IEEE MTT-S International Microwave Symposium Digest

View full text Add to dashboard Cite

This work presents the design of a current mode class-D (CMCD) amplifier using a measurement based approach. Because the CMCD amplifier is in fact a push-pull version of the inverted class-F amplifier the optimum load impedances for an inverted class-F single-ended operated LDMOS FETs have been determined using an active harmonic load-pull setup. The correct time domain waveforms for an inverted class-F amplifier were verified by measurements and simulations. Based on the harmonic load-pull measurements an experimental current mode class-D amplifier with 61.5% power-added efficiency (PAE) at 25 W output is demonstrated using LDMOS FETs at 900 MHz.

show abstract

“…The forward and backwards traveling waves up to the 5th harmonic were captured by a large signal network analyzer (LSNA) based on a MT4463 from NMDG. The back injected waves were iteratively adjusted to achieve the desired harmonic load impedances [48]. Figure 8 shows the measured time domain waveforms at the transistor leads where the transistor was driven at the 1 dBcompression point.…”

Section: Active Harmonic Load Pull Measurement Setupmentioning

confidence: 99%

Highly efficient switched-mode transmitter using a current mode class-D RF amplifier

Schuberth

Singerl

Gadringer

et al. 2010

Int J RF and Microwave Comp Aid Eng

View full text Add to dashboard Cite

This article presents a switched-mode transmitter architecture using a current mode class-D (CMCD) amplifier. To achieve high average efficiency for a modulated signal the envelope of the complex baseband signal is transformed into pulses such that the CMCD amplifier is operated either at its peak efficiency or completely switched off. The CMCD amplifier has been designed based on single-tone active harmonic load-pull measurements to achieve a power-added efficiency (PAE) of 61.5% with 25 W output power at 900 MHz using LDMOS FETs. Removing the losses of the demodulation filter and of the amplifier a 10% higher efficiency than in an ideal class-B amplifier can be obtained for burst-mode operation with a peak-to-average power ratio of 10 dB. V C 2010 Wiley Periodicals, Inc. Int J RF and Microwave CAE 20: 446-457, 2010.

show abstract

A time-domain large-signal measurement setup

Cited by 7 publications

References 10 publications

An active load-pull setup for broadband signals using digital baseband processing for the active loop

An active load-pull setup for broadband signals using digital baseband processing for the active loop

Design of a current mode class-D RF amplifier using load pull techniques

Highly efficient switched-mode transmitter using a current mode class-D RF amplifier

Contact Info

Product

Resources

About