A planar microstrip coupler with enhanced power coupling
Electronics Letters Institution of Engineering and Technology 53:1 (2016) 34-36
Abstract:
In this Letter, we present the design of a planar microstrip coupler where power coupling between two parallel microstrip lines can easily be controlled. Enhancement of power coupling is done via two small slots in the ground plane underneath the microstrip pair. The ground plane slots force the field lines near the edge of each microstrip to cross to the adjacent microstrip. The magnitude of the power coupling can easily be controlled by adjusting the length of the slots. Here, we describe the operation of a microstrip coupler, and present the design of a1 X 4 power distributor array that can be used to distribute the input microwave power uniformly to four branch lines arranged in a row. We also present the measured responses of the array, and show that the performance agree very well with simulated results.The Far Infrared Spectroscopic Explorer (FIRSPEX): probing the lifecycle of the ISM in the universe
Proceedings of SPIE SPIE, the international society for optics and photonics 9904 (2016) 99042k-99042k-7
The Far InfraRed Spectroscopic EXplorer (FIRSPEX)
27th International Symposium on Space Terahertz Technology, ISSTT 2016 (2016)
Abstract:
The Far InfraRed Spectroscopic EXplorer (FIRSPEX) is a novel concept for an astronomy satellite mission that will revolutionise our understanding of the properties of the Interstellar Medium (ISM) and star formation through velocity resolved spectroscopic observations at multi-terahertz frequencies. FIRSPEX comprises a fully cryogenic (~4K) heterodyne payload and a ~1.2 m primary antenna to scan the sky in a number of discreet spectroscopic channels delivering 3- dimensional spectral information. The spectral range selected contains important molecular, atomic and ionic species; the majority of which cannot be observed from the ground. FIRSPEX is UK led with additional contributions from partners throughout Europe. FIRSPEX opens up a relatively unexplored parameter space that will produce an enormously significant scientific legacy by focusing on the properties of the multi-phase ISM, the assembly of molecular clouds in our Galaxy and the onset of star formation topics which are fundamental to our understanding of galaxy evolution.230 GHz Scalable Design
Chapter in DEVELOPMENT OF COHERENT DETECTOR TECHNOLOGIES FOR SUB-MILLIMETRE WAVE ASTRONOMY OBSERVATIONS, (2016) 205-210
Ancillary Data of Individual Tested Device
Chapter in DEVELOPMENT OF COHERENT DETECTOR TECHNOLOGIES FOR SUB-MILLIMETRE WAVE ASTRONOMY OBSERVATIONS, (2016) 189-195