Journal ArticleDOI
Experimental Investigation of a Low-Cost, High Performance Focal-Plane Horn Array
TLDR
In this article, a 230 GHz focal-plane array consisting of 37 smooth-walled multiple flare-angle horn arrays was constructed by direct drilling, and the measured beam patterns for a large sample of these horns across the array, demonstrating the suitability of their manufacturing techniques for large format arrays.Abstract:
In previous work, we have described novel smooth-walled multiple flare-angle horns designed using a genetic algorithm. A key feature of these horns is that they can be manufactured very rapidly and cheaply in large numbers, by repeated direct drilling into a single plate of aluminum using a shaped machine tool. The rapid manufacturing technique will enable the construction of very low cost focal-plane arrays, offering an alternative to conventional electroformed corrugated horn arrays. In order to experimentally demonstrate the new technology, we constructed a 230 GHz focal-plane array comprising 37 smooth- walled horns fabricated by direct drilling. We present the measured beam patterns for a large sample of these horns across the array, demonstrating the suitability of our manufacturing techniques for large format arrays. We have measured the cross coupling between adjacent feeds and have shown that it is negligible. We also present high quality beam patterns measured for a much smaller 700 GHz horn, showing the promise of the extending this technology to THz frequencies.read more
Citations
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Patent
Method and apparatus for coupling an antenna to a device
Paul Shala Henry,Donald J. Barnickel,Farhad Barzegar,Robert Bennett,Irwin Gerszberg,Thomas M. Willis +5 more
TL;DR: In this paper, the authors describe a system that receives, by a feed point of a dielectric antenna, electromagnetic waves from a core coupled to the feed point without an electrical return path, and radiates a wireless signal responsive to the electromagnetic waves being received at the aperture.
Patent
Backhaul link for distributed antenna system
Paul Shala Henry,Donald J. Barnickel,Farhad Barzegar,George Blandino,Irwin Gerszberg,Thomas M. Willis +5 more
TL;DR: In this paper, a distributed antenna and backhaul system provide network connectivity for a small cell deployment using high-bandwidth, millimeter-wave communications and existing power line infrastructure, rather than building new structures, and installing additional fiber and cable.
Patent
Remote distributed antenna system
Farhad Barzegar,Donald J. Barnickel,George Blandino,Irwin Gerszberg,Paul Shala Henry,Thomas M. Willis +5 more
TL;DR: In this article, a distributed antenna system is provided that frequency shifts the output of one or more microcells to a 60 GHz or higher frequency range for transmission to a set of distributed antennas.
Patent
Method and apparatus for sensing a condition in a transmission medium of electromagnetic waves
TL;DR: In this article, the authors describe a device that facilitates transmitting electromagnetic waves along a surface of a wire that facilitates delivery of electric energy to devices, and sensing a condition that is adverse to the electromagnetic waves propagating along the surface of the wire.
Patent
Method and apparatus that provides fault tolerance in a communication network
Paul Shala Henry,Robert Bennett,Irwin Gerszberg,Farhad Barzegar,Donald J. Barnickel,Thomas M. Willis +5 more
TL;DR: In this article, a system for detecting a fault in a first wire of a power grid that affects a transmission or reception of electromagnetic waves that transport data and that propagate along a surface of the first wire is described.
References
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Book
Practical Genetic Algorithms
Randy L. Haupt,Sue Ellen Haupt +1 more
TL;DR: Introduction to Optimization The Binary genetic Algorithm The Continuous Parameter Genetic Algorithm Applications An Added Level of Sophistication Advanced Applications Evolutionary Trends Appendix Glossary Index.
Book
Corrugated Horns for Microwave Antennas
P. J. B Clarricoats,A. D. Olver +1 more
TL;DR: In this article, the authors describe the theory and design of corrugated horns and scalar feeds for microwave reflector antennas and explain why hybrid mode feeds are ideal feeds for reflectors.
Book
Microwave Horns and Feeds
TL;DR: In this article, the authors describe the theory, design, performance and application of microwave horns and feeds for reflector antennas, and describe design principles and methods of analysis, as well as the first general treatment of feeds for RSS antennas.
Journal ArticleDOI
Benchmark parameters for CMB polarization experiments
TL;DR: In this paper, the authors provide a language for describing systematic effects which distort the observed CMB temperature and polarization fields and so contaminate the B modes, and identify seven types of effects, described by 11 distortion fields, and show their association with known instrumental systematics such as common mode and differential gain fluctuations, line cross-coupling, pointing errors, and differential polarized beam effects.