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Novel Distributed Direct Conversion Receiver for UWB Systems

詳細技術說明: Few methods have been used to achieve wideband characteristics of RF front-end circuits. The first solution is resistive feedback amplifiers and the second is to extend the narrow band technique to wide band using high order band-pass filtering to achieve the required wideband input matching. These two approaches suffer from a lack of full band coverage and low sensitivity, respectively.The described invention deploys a distributed approach to achieve wideband characteristics of the front-end and has the advantage of its distributed architecture providing intrinsic wideband characteristics and consequently less sensitivity to the passive elements of component variation seen in process.

*Abstract: Ultra-Wide Band (UWB) wireless broadcasts are capable of carrying huge amounts of data up to 250 feet with extremely little transmit power and high immunity to interference and multipath fading. The spread spectrum characteristics of UWB wireless systems, and the ability of UWB wireless receivers to highly resolve the signal in multi-path fading channels make them a desirable wireless system of choice in a variety of high-rate, short- to medium-range communications. The ability of UWB systems to locate objects to within one inch is highly attractive to applications in the military, law enforcement and rescue agency realms. This UWB system approach is also pertinent to using active sensor networks and collision-avoidance. The circuit techniques that are used in a UWB transceiver are quite different from those used in current narrow bandwidth RF technology thus an incentive to design novel circuit topologies that achieve a gain-for-delay-tradeoff without affecting bandwidth and operating at substantially higher frequencies than conventional circuits.

*Principal Investigation: Name: Payam Heydari
Department:

Name: Aminghasem Safarian
Department:

Name: Lei Zhou
Department:

附加資料: Patent Number: US8212056B2
Application Number: US2008216080A
Inventor: Kwong, Fuk Yee | So, Chau Ming
Priority Date: 30 Jun 2008
Priority Number: US8212056B2
Application Date: 30 Jun 2008
Publication Date: 3 Jul 2012
IPC Current: C07F000902
US Class: 548412
Assignee Applicant: The Hong Kong Polytechnic University
Title: Ligands for transition-metals and methods of use
Usefulness: Ligands for transition-metals and methods of use
Summary: For synthesis of pharmaceuticals, materials and agriculture; and as scaffolds in metal-ligand complexes.
Novelty: New indolyl phosphine ligand useful for the synthesis of pharmaceuticals, materials and agriculture, and as scaffolds in metal-ligand complexes

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