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Published byHazel Hanchett Modified over 3 years ago

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1 Multi-Frequency Tuning Using Cascaded Mechanical Tuners Roman Meierer Gary Simpson Maury Microwave Corporation 50+ years of measurement confidence! Revision May 11, 2009

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2 History of Harmonic Tuning Phase Adjustment only –Stubs inside test fixtures (Traditional approach) –FOCUS harmonic rejection tuners (late 90 th ) Magnitude & Phase Adjustment –Triplexer and tuners (early 90 th ) –ATN electronic tuners (mid 90 th ) –FOCUS MPT tuner (2004) –MAURY cascaded tuners (2008)

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3 The SLIDE-SCREW TUNER

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4 What happens at harmonic frequencies

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5 Vector Cascading

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7 F1 Target (fixed) Harmonic Tuning with fixed F0 target F2 Target (variable) 0.9 / 180 o 0.8 / +90 o 0.8 / 0 o 0.9 / -90 o

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8 Tuner Characterization using Adaptive Modeling up to 3 controlled harmonics up to 10 harmonics to measure adjustable Point Separation maximum phase step automatically selects probe optimizes point distribution

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9 Tuner Characterization at PRIMARY Frequency

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10 Tuner Characterization at SECONDARY Frequencies

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11 Ultra fast in-memory Data Binning Points/TunerCombinationsBinning TimeMemoryTuning 861638 million201 sec2.3GB2.1 sec 637258 million42.8 sec1.05GB1.8 sec 506129 million12.52 sec532MB1.2 sec 36649 million3.14 sec219MB0.6 sec Benchmarks tests performed on Intel Core Duo T8300 @ 2.4GHz Large Address aware application, 3GB of virtual address space

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12 High Precision Harmonic Tuning

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13 Harmonic Phase Sweep

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14 Measured Tuning Accuracy F1: 2 GHz, fixed at 0.9 / 180 o F2: 4 GHz, sweep 0.8 / -180 o..180 o F3: 6 GHz, fixed at 0.8/-90 o

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15 ATS Revision 5.2

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16 Optimal Usage of Tuners Example: you own 4 tuners Configuration1: 2x Input – 2x Output Configuration2: 1x Input – 3x Output Configuration3:2 separate setups with 2 tuners each

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17 Conclusions High Precision Harmonic tuning of 2 or 3 frequencies Tuning accuracy better than -45dB Ultra-fast in memory data binning Multi-loop fine tune algorithm

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