A novel active harmonic load-pull setup for on-wafer device linearity characterization

Spirito, M.; Vreede, L.C.N. de; Kok, Manon; Pelk, M.; Hartskeerl, D.M.H.; Jos, H.F.F.; Mueller, Jan-Erik; Burghartz, Joachim N.

doi:10.1109/mwsym.2004.1339207

Cited by 11 publications

(6 citation statements)

References 2 publications

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“…XdB/ 20 (4) where X dB represents the power values: X is negative for losses, attenuation and coupling and positive for gain. The ⌫ L coefficient is then synthesized on a circle whose center is ⌫ 0 and radius is R .…”

Section: Conventional and New Configuration Of The Active Loop With Pmentioning

confidence: 99%

“…Unlike the passive technique using lossy tuner, the active load one [1,2] allows highly reflective load impedances to be synthesized, especially at millimeter waves. More recently, active load-pull techniques at microwave frequencies are combined with pulsed RF signals [3] and with harmonic loads [4] as well as with time-domain characterization [5] resulting in a large variety of measurement setups to characterize the non-linear behavior of RF active devices.…”

Section: Introductionmentioning

confidence: 99%

“…For that reason, the mobile industry provides the new broadcast services for portable devices [2] such as PMP, PDA, etc. Lately, protruded [3] or internal antennas [4,5] have been reported for DTV application. The protruded antenna is mounted at the top of the edge of a ground plane with feed gap and narrow slits are inserted in radiation patch.…”

Section: Introductionmentioning

confidence: 99%

“…The antenna suggested in Ref. 4 is realized by utilizing the coupling effect between the main radiating element and the system ground plane. However, these antennas require a large ground plane, such as supporting metal frame of the display of laptop computer, in order to obtain the wide bandwidth required for DTV signal reception.…”

Section: Introductionmentioning

confidence: 99%

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A new configuration to improve the active loop technique for transistor large signal characterization in the Ka band

Yattoun

Peden

2007

Micro & Optical Tech Letters

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Section: Conventional and New Configuration Of The Active Loop With Pmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A new configuration to improve the active loop technique for transistor large signal characterization in the Ka band

Yattoun

Peden

2007

Micro & Optical Tech Letters

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“…The first attempt to independently control both BB and second-harmonic impedances at the input and output of the device using an active load-pull system was given in [10]. This work was based on loss-compensating diplexers in combination with mechanical tuners to implement the active terminations.…”

Section: Implementation Of the Active Harmonic Load-pull Setupmentioning

confidence: 99%

Active Harmonic Load–Pull for On-Wafer Out-of-Band Device Linearity Optimization

Spirito

Pelk

Rijs³

et al. 2006

IEEE Trans. Microwave Theory Techn.

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In this paper, we present an active harmonic load-pull system especially developed for the on-wafer linearity characterization/optimization of active devices with wideband modulated signals using the out-of-band linearization technique. Our setup provides independent control of the impedances at the baseband, fundamental, and second-harmonic frequencies presented to the input and output of the device under test. Furthermore, to enable realistic test conditions with wideband-modulated signals, the electrical delays in the load-pull system are kept as small as possible by implementing a novel loop architecture with in-phase quadrature modulators. We have achieved a phase variation of the reflection coefficient of only 5 MHz for both the fundamental and second-harmonic frequencies.We demonstrate the high potential of the system for the on-wafer evaluation of new technology generations by applying out-of-band linearization to heterojunction bipolar transistor (HBT) and laterally diffused metal-oxide-semiconductor (LDMOS) devices. For the HBT, we outline a game plan to obtain the optimum efficiency-linearity tradeoff. Finally, a record-high efficiency-linearity tradeoff was achieved (without digital predistortion) for an inverse class-AB operated Philips Gen 6 LDMOS device, yielding 44% efficiency at an adjacent channel power level of 45 dBc at 2.14 GHz for an IS-95 signal.

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Base-band impedance control and calibration for on-wafer linearity measurements

Pelk

Vreede

Spirito³

et al. 2004

ARFTG 63rd Conference, Spring 2004

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A novel active harmonic load-pull setup for on-wafer device linearity characterization

Cited by 11 publications

References 2 publications

A new configuration to improve the active loop technique for transistor large signal characterization in the Ka band

A new configuration to improve the active loop technique for transistor large signal characterization in the Ka band

Active Harmonic Load–Pull for On-Wafer Out-of-Band Device Linearity Optimization

Base-band impedance control and calibration for on-wafer linearity measurements

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