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This paper describes the design and fabrication of a distributed MEMS () transmission line DMTL , used to realize a transmission-line with a voltage-variable electrical length for microwave circuits. The DMTL is a coplanar waveguide periodically loaded with continuously-variable MEMS capacitors. A tunable bandpass filter was designed and fabricated on 700(More)
Replicated circular openings ranging in size from 0.1 to 1 ha were cleared on a Sierran mixed conifer forest in 1996 at the Blodgett Forest Research Station, California and planted with seedlings of six native species. After 3 years of growth, heights of all trees were measured and analyzed according to species, opening size, and location within the(More)
Replicated circular openings ranging in size from 0.1 to 1 ha were cleared in 1996 at Blodgett Forest Research Station, California, and planted with seedlings of six native species. After 5 years of postharvest growth, heights were measured and analyzed according to species, opening size, and location within opening. The sequence of mean height from tallest(More)
Some of the limitations of Coupled Oscillator Arrays, mainly intrinsic small locking bandwidth, amplitude fluctuations and limited agreement between unit cells and models, can he overcome with the use of Coupled Phase-Loeked Loop Arrays, which with appropriate models are more predictable than COAs and offers larger locking range and amplitude-independent(More)
Experimental canopy gaps ranging in size from 0.1 to 1.0 ha (0.25 to 2.5 acres) were created in a mature mixed conifer forest at Blodgett Forest Research Station, California. Following gap creation, six species were planted in a wagon-wheel design and assessed for survival after two growing seasons. Study trees were measured after seven years to describe(More)
— This paper presents an electronically tunable impedance transformer and matching network for RF applications, utilizing thin-film Barium Strontium Titanate (BST) tunable capacitors in an integrated-passive network on sapphire. The impedance transformer can be electronically varied from a 4:1 to 2:1 transformation in a 50 Ohm environment. A slight(More)
1993 iii Acknowledgments I would like to acknowledge the contributions of all those who made this work possible. I am especially grateful to Mark Rodwell for his never ending help and guidance throughout the last four years. He is remarkable for his broad outlook and quick thinking in just about all matters. Mark has been an instructor, manager, and friend.(More)