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The lunar surface offers several advantages for astronomical observations at low radio frequencies. These include shielding from terrestrial interference on the farside, shielding from solar emission half the time, and stable, easily calibrated array baselines. Low frequency radio astronomy offers compelling science in multiple areas, from cosmology to extrasolar planets. It is likely to be one of...
Tunable diode laser spectroscopy (TDLS) can only be successfully implemented if a number of system characterization procedures and critical parameter measurements can be made accurately. These include: application of a wavelength/frequency scale to the signals recovered in time; measurement of the frequency dither applied to the laser; measurement of the relative phase between the laser power modulation...
In this paper, the design of a compact planar bandpass filter above a defected ground plane is presented. The filter is designed as a combination of microstrip resonators and exploits the properties of a planar electromagnetic bandgap (EBG) structure patterned unto the ground plane of the printed circuit board material to provide a very wide stopband of up to 5 times the fundamental frequency. The...
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