نتایج جستجو برای: unbalanced input
تعداد نتایج: 230027 فیلتر نتایج به سال:
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This paper focuses on the S-parameter method that is a basic method for measuring the input impedance of balanced-fed antennas. The basic concept of the method is summarized using the two-port network, and it is shown that the method can be enhanced to the unbalanced antennas using a formulation based on incident and reflected waves. The compensation method that eliminates the influence of a me...
In this paper we present two algorithms for the computation of a shifted order basis of an m×n matrix of power series over a field K with m ≤ n. For a given order σ and balanced shift ~s the first algorithm determines an order basis with a cost of O∼(nωdmσ/ne) field operations in K, where ω is the exponent of matrix multiplication. Here an input shift is balanced when max(~s)−min(~s) ∈ O(mσ/n)....
We describe efficient PRAM algorithms for constructing unbalanced quadtrees, balanced quadtrees, and quadtree-based finite element meshes. Our algorithms take time O(logn) for point set input and O(logn log k) time for planar straight-line graphs, using O(n+k/ logn) processors, where n measures input size and k output size.
Modern test equipment used for antenna measurements, such as vector network analyzers (VNA), generally provide unbalanced coaxial measurement ports. This presents a problem when performing measurements on devices such as dipole antennas, which present a balanced input. A balun must be used to interface the dipole to the VNA. Since there is no straightforward way to include the balun in the stan...
Ø provide independent control of the magnitude and frequency of the generated output voltages; Ø give sinusoidal input currents with full control of the displacement angle; Ø provide the maximum output to input voltage ratio; Ø satisfy the conflicting requirements of minimum low order harmonics and minimum switching losses, Ø be able to compensate the effects of unbalanced and/or distortions of...
Conventional direct power control (DPC) technique is a simple and efficient control strategy for three-phase PWM rectifier. However, its performance is deteriorated when the converter is supplied by unbalanced or distorted grid voltages. This paper describes the design and implementation of a new configuration of DPC based on disturbance rejection principle to achieve near-sinusoidal input curr...
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