Full Wave Boundary Integral Analysis of Arbitrary Integrated Transmission Lines: Origin and Avoidance of Spurious Solutions

A miniature ultra-wideband (UWB) bandpass filter using three-quarters wavelength resonators is presented in this paper. Direct-connected feed method is employed between the input/output ports and the resonators in order to overcome the shortcomings due to the gap-coupled feed method and produce two transmission zeros in the lower and upper stopbands. On the other hand, two quarter-wavelength matching transmission lines are introduced to the input/output ports to improve the reflection loss characteristic in the passband of the filter. In addition, the resonators are folded to be open ring structures, which are more miniaturized than the conventional linear structure. As a consequence, the filter is compact in size and exhibits good performance. The filter is successfully realized in theory and verified by full wave EM simulation, and simulated frequency response results show that the fabricated filter has an insertion loss of better than 1dB in the passband and two rejections of greater than 25dB in most of the stopbands.

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Calculating Static Field and Charge Distributions Using Full-Wave Boundary Element Methods

2006 12th Biennial IEEE Conference on Electromagnetic Field Computation ◽

10.1109/cefc-06.2006.1632795 ◽

2006 ◽

Author(s):

Haixin Ke ◽

T. Hubing

Keyword(s):

Boundary Element ◽

Static Field ◽

Boundary Element Methods ◽

Charge Distributions ◽

Full Wave ◽

Wave Boundary

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A standard energy eigenvalue problem for directly solving the stationary states of quantum billiards via boundary integral analysis

Forces in Mechanics ◽

10.1016/j.finmec.2021.100027 ◽

2021 ◽

pp. 100027

Author(s):

A.-V. Phan ◽

M. Karimaghaei

Keyword(s):

Eigenvalue Problem ◽

Energy Eigenvalue ◽

Boundary Integral ◽

Stationary States ◽

Integral Analysis ◽

Standard Energy

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Design and Modeling of New UWB Metamaterial Planar Cavity Antennas with Shrinking of the Physical Size for Modern Transceivers

International Journal of Antennas and Propagation ◽

10.1155/2013/562538 ◽

2013 ◽

Vol 2013 ◽

pp. 1-12 ◽

Cited By ~ 9

Author(s):

Mohammad Alibakhshi Kenari

Keyword(s):

Transmission Lines ◽

Patch Antenna ◽

Patch Antennas ◽

Frequency Bandwidth ◽

Left Handed ◽

Full Wave ◽

Radiation Properties ◽

Unit Cells ◽

Constitutive Parameters ◽

Large Frequency

A variety of antennas have been engineered with MTMs and MTM-inspired constructs to improve their performance characteristics. This report describes the theory of MTMs and its utilization for antenna's techniques. The design and modeling of two MTM structures withε-μconstitutive parameters for patch antennas are presented. The framework presents two novel ultrawideband (UWB) shrinking patch antennas filled with composite right-/left-handed transmission line (CRLH-TL) structures. The CRLH-TL is presented as a general TL possessing both left-handed (LH) and right-handed (RH) natures. The CRLH-TL structures enhance left-handed (LH) characteristics which enable size reduction and large frequency bandwidth. The large frequency bandwidth and good radiation properties can be obtained by adjusting the dimensions of the patches and CRLH-TL structures. This contribution demonstrates the possibility of reducing the size of planar antennas by using LH-transmission lines. Two different types of radiators are investigated—a planar patch antenna composed of fourO-formed unit cells and a planar patch antenna composed of sixO-shaped unit cells. A CRLH-TL model is employed to design and compare these two approaches and their realization with a varying number ofL-Cloaded unit cells. Two representative antenna configurations have been selected and subsequently optimized with full-wave electromagnetic analysis. Return loss and radiation pattern simulations of these antennas prove the developed concept.

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