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Waveguide filter

About: Waveguide filter is a research topic. Over the lifetime, 5161 publications have been published within this topic receiving 73825 citations.


Papers
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Book
10 Jul 1986
TL;DR: In this paper, the fundamental concepts and principles of guided wave optics are developed from Maxwell's equations, and a complete guide gives a clear coverage of 2 and 3-dimensional optical waveguides, optical fibers, prism and dielectric waveguide couplers, waveguide filters, grating reflectors and optical spectrum analyzers.
Abstract: Using optics to present electromagnetic theory, Electromagnetic Principles of Integrated Optics is a radical departure from other texts and a unified and comprehensive introduction to the field of integrated optics. All the fundamental concepts and principles of guided wave optics are developed from Maxwell's equations. From this perspective, the study of the slab and rectangular dielectric waveguide replaces that of the parallel plate and rectangular mentalic waveguide, the optical fiber that of the coaxial transmission line, radiation losses that of conduction losses, and aperture diffraction that of antenna radiation. This complete guide gives you clear coverage of 2- and 3-dimensional optical waveguides, optical fibers, prism and dielectric waveguide couplers, waveguide filters, grating reflectors and optical spectrum analyzers. You will find new approaches to topics such as dielectric waveguides, radiation modes and WKB theory. Electromagnetic Principles of Integrated Optics is carefully structured so that all material is developed from first principles. Sophisticated concepts such as the Goos-Haenchen shift, radiation modes, Bragg scattering of guided modes and optical fiber mode theory have a firm foundation and are made easily understandable. Problems and worked-out examples reinforce the material and are good for self-study. For reference, as a problem-solver, or for self-study. The book provides many of the concepts and mathematical tools necessary to analyze realworld guided wave optics problems.

250 citations

Journal ArticleDOI
TL;DR: A survey of the major techniques used in the design of microwave filters is presented in this article, where it is shown that the basis for much fundamental microwave filter theory lies in the realm of lumped-element filters, which are actually used directly for many applications at microwave frequencies as high as 18 GHz.
Abstract: A survey of the major techniques used in the design of microwave filters is presented in this paper. It is shown that the basis for much fundamental microwave filter theory lies in the realm of lumped-element filters, which indeed are actually used directly for many applications at microwave frequencies as high as 18 GHz. Many types of microwave filters are discussed with the object of pointing out the most useful references, especially for a newcomer to the field.

248 citations

Journal ArticleDOI
TL;DR: In this paper, the design of a class of highly selective microstrip bandpass filters that consist of microstrip open-loop resonators that exhibit a single pair of attenuation poles at finite frequencies is presented.
Abstract: This paper presents the design of a class of highly selective microstrip bandpass filters that consist of microstrip open-loop resonators that exhibit a single pair of attenuation poles at finite frequencies. A practical design technique for this class of filters is introduced, including tables and formulas for accurate and fast filter synthesis. Two design examples of a six-pole filter with a fractional bandwidth of 7.331% at 955 MHz and an eight-pole filter with a fractional bandwidth of 10.359% at 985 MHz are described. Theoretical and experimental results are presented. The compact size and the excellent performance of this class of filters have been demonstrated.

248 citations

Journal ArticleDOI
TL;DR: This paper describes the development of microwave filter technology from an applications perspective, showing how military applications and the satellite communications industry created demand for low-mass narrow-band low-loss filters with severe specifications on amplitude selectivity and phase linearity led to development of dual-mode waveguide and dielectric-resonator filters.
Abstract: This paper describes the development of microwave filter technology from an applications perspective. Military applications required wide-band and tunable devices for electronic support measures receivers, which led to the development of highly selective wide-band waveguide filters, coaxial resonator and suspended-substrate multiplexers, and electronically tunable filters. The satellite communications industry created demand for low-mass narrow-band low-loss filters with severe specifications on amplitude selectivity and phase linearity. These requirements resulted in the development of dual-mode waveguide and dielectric-resonator filters, and advances in the design of contiguous multiplexers. Cellular communications base-stations demanded low-loss high power-handling selective filters with small physical size, capable of being manufactured in tens of thousands at a reasonable cost. These demands led to advances in coaxial resonator, dielectric resonator, and superconducting filters, and also to methods of cost-reduction, including computer-aided alignment. Cellular radio handsets have required the manufacture of hundreds of millions of extremely small very low-cost filters, still with reasonably low loss and high selectivity. This has driven significant advances in integrated ceramic, surface, and bulk acoustic-wave active filters and filters using micromachined electromechanical systems.

241 citations

Journal ArticleDOI
TL;DR: In this paper, a 50/spl Omega/ coplanar waveguide with split ring resonators (SRRs) etched in the back side of the substrate is presented, with the result of a sharp and narrow rejection band in the vicinity of the resonant frequency of the rings.
Abstract: A novel compact stop band filter consisting of a 50 /spl Omega/ coplanar waveguide (CPW) with split ring resonators (SRRs) etched in the back side of the substrate is presented. By aligning SRRs with the slots, a high inductive coupling between line and rings is achieved, with the result of a sharp and narrow rejection band in the vicinity of the resonant frequency of the rings. In order to widen the stop band of the filter, several ring pairs tuned at equally spaced frequencies within the desired gap are cascaded. The frequency response measured in the fabricated prototype device exhibits pronounced slopes at either side of the stop band and near 0 dBs insertion loss outside that band. Since SRR dimensions are much smaller than signal wavelength, the proposed filters are extremely compact and can be used to reject frequency parasitics in CPW structures by simply patterning properly tuned SRRs in the back side metal. Additional advantages are easy fabrication and compatibility with MMIC or PCB technology.

237 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202338
202287
202147
2020106
2019144
2018117