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In this paper we provide a method that can be used to analyze power distribution networks with electromagnetic accuracy. The method is applicable to any power distribution network in the chip, package or printed circuit board (PCB). The method can also be used to compute the interaction of the power distribution network between various domains. We provide examples to validate this approach.
Two multiple-antenna-port and multiple-user-port antenna tuners are studied and compared. The first one is made up of independent and uncoupled single-antenna-port and single-user-port antenna tuners, each having the structure of a π-network. The second one is new. It cannot be separated into independent and uncoupled antenna tuners and it has the structure of a multidimensional π-network. It is shown...
A linear three-element slot antenna array with intentionally strong mutual coupling between the elements, a so-called connected array, is presented. By simultaneously feeding all three ports of the array, at different frequencies over an octave bandwidth and with different phases, feed-port reflection coefficients with magnitude larger than one, or negative active feed impedances, can occur. A reactive...
Antenna arrays are recognized as ubiquitous communication devices utilized in a significant number of applications. Subarrays have been used to improve array processing. This paper process an integrated decoupling and matching network for a 3-element compact array. A prototype has been fabricated to verify the theory.
Highly coupled antennas are difficult to match due to their large reactive loading. In this paper, the input impedance of a two port highly coupled antenna is matched to develop a miniature antenna pair. This work is particularly useful for biomimetic antenna arrays that are highly coupled, and experience tradeoffs in available output power and isolation. The matching technique entails use of an adjustable...
The paper proposes an approach for immunizing the input impedance of a tag-antenna against disturbances by the proximity effect of external objects. The idea is to drive two symmetric closely-spaced antennas with out-of-phase excitations, resulting in a differential input impedance. When an object is placed in the close proximity of the antenna system, the coupling with the two symmetric antennas...
Parallel transmit technology for magnetic resonance imaging can mitigate the challenges with the transmit field (B1) inhomogeneity and capture the increased signal-to-noise ratio benefit at high field strengths. Most of the available parallel transmit systems use conventional amplifier architectures with array coils that employ complex decoupling methods to isolate the individual elements. Current...
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