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Chu's limit determines the minimum radiation quality factor Q of an electrically small resonator, and hence its maximum operational bandwidth, which is inversely proportional to its volume. This bound imposes severe restrictions in several areas of technology, from wireless communications to nanophotonics and metamaterials. We show that a suitably tailored temporal modulation of the matching network, combined with proper detuning of the feeding impedance, can overcome this limit and enable radiation over broader bandwidths, which scale as 1/sqrt[Q], ensuring at the same time stability. Our findings open opportunities for communication systems, nanophotonics, and sensor technology.
This article was published in the following journal.
Name: Physical review letters
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The primary aim of this study is to assess the changes in the impedance parameters of muscles in inclusion body myositis (IBM) through electrical impedance myography (EIM), an emerging non...
Does baseline impedance measured during the landmark phase of esophageal High resolution impedance manometry HRIM correlates with direct mucosal impedance measurement and discriminates GER...
The intent of this feasibility study is to collect and analyze intra-thoracic impedance measurements from a CRT-D device in a heart failure population.
To demonstrate the safety and effectiveness of the Impedance Monitoring Feature in St Jude Medical cardiac devices.
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Objective tests of middle ear function based on the difficulty (impedance) or ease (admittance) of sound flow through the middle ear. These include static impedance and dynamic impedance (i.e., tympanometry and impedance tests in conjunction with intra-aural muscle reflex elicitation). This term is used also for various components of impedance and admittance (e.g., compliance, conductance, reactance, resistance, susceptance).
A type of impedance plethysmography in which bioelectrical impedance is measured between electrodes positioned around the neck and around the lower thorax. It is used principally to calculate stroke volume and cardiac volume, but it is also related to myocardial contractility, thoracic fluid content, and circulation to the extremities.
Recording changes in electrical impedance between electrodes placed on opposite sides of a part of the body, as a measure of volume changes in the path of the current. (Stedman, 25th ed)
An exchange of DNA between matching or similar sequences.
An enzyme that hydrolyzes 1,6-alpha-glucosidic branch linkages in glycogen, amylopectin, and their beta-limit dextrins. It is distinguished from pullulanase (EC 126.96.36.199) by its inability to attack pullulan and by the feeble action of alpha-limit dextrins. It is distinguished from amylopectin 6-glucanohydrolase (EC 188.8.131.52) by its action on glycogen. With EC 184.108.40.206, it produces the activity called "debranching enzyme". EC 220.127.116.11.