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Session: P23:00 PM Thursday, December 11, 2008 Room: Red Lion |
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Session: P2 | Poster Session 2 - Non-Linear Network Measurement |
Chair: | Evan Fledell, Intel Corporation |
| | P2-1 | Power Amplifier Behavioral Modeling Performance Comparison of the LSNA and the modulation-domain system | 3:00 PM-4:00 PM | P. N. Landin1, C. Fager2, M. Isaksson1, K. Andersson2, 1University of Gävle, Gävle, Sweden, 2Chalmers University of Technology, Göteborg, Sweden |
(25) | Performance of power amplifier models depends strongly on the performance of the used measurement system. The modeling performance of a large-scale network analyzer (LSNA) and the modulation-domain system (MDS) consisting of a vector signal generator and a vector signal analyzer has been compared. Models validated using data from the MDS gives lower modeling errors. Cross-validation between the systems shows that models extracted using the LSNA give nearly the same performance as the MDS. | | |
P2-2 | Simultaneous Measurement of High and Low Frequency Response of Non-Linear Microwave Circuits | 3:00 PM-4:00 PM | G. Avolio1, G. Pailloncy2, D. Schreurs1, M. Vande Bossche2, B. Nauwelaers1, 1K.U.Leuven, Leuven, Belgium, 2NMDG nv, Bornem, Belgium |
(20) | In this work, measurements of the high frequency as well as the low frequency response of a non-linear microwave circuit are reported. The developed set-up is based on the extension of LSNA and it enables the simultaneous measurement of baseband response and RF behaviour. Thanks to this capability a direct correlation between the variation of baseband impedance and asymmetry of distortion components around the fundamental carrier is possible. Experimental results of two-tone measurements, carried out on a hybrid GaAs microwave circuit, are shown. | | |
P2-3 | Design and Testing of a Software Feedback Loop for RF Power Leveling | 3:00 PM-4:00 PM | X. Cui, T. P. Crowley, National Institute of Standards and Technology, Boulder, United States |
(38) | We have developed a software feedback loop that stabilizes the RF power input in calorimetric measurements to better than 30 ppm. In this system, a bolometric sensor with a Type IV power meter is used to detect the power. Feedback is provided to the AM input of a synthesizer through a computer-controlled voltage source. The software feedback loop replaces an analog feedback loop that used a NBS Type II Power Measurement System to provide the AM input signal. The new system removes a potential error in the DC substituted power that is caused by loading the Type IV when it is connected to the Type II. The new leveling system is more flexible than the previous system and it is easy to modify the desired leveling accuracy and real-time feedback rate. The design and evaluation of the software leveling system is presented. It has been tested using the WR-15 microcalorimeter which will be the national standard for power in the US from 50 to 75 GHz. | | |
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