This paper reports on a new concept of narrow bandpass filters leading to perfectly controlled electrical responses within both the required operating bandwidth and adjacent undesired bands. A specific topology is considered for such "global synthesis": in comparison with conventional filter performances, it provides significant improvements terms rejection control. The attenuated frequencies are each located apart from by means n transmission zeros introduced through original dual-behavior...

This paper reports on a new topology of high-performance dual-band filters. is derived from the Dual Behavior Resonator (DBR) filter. The resulting resonator directly dual-band. It allows control two bandpasses separated by transmission zero to ensure high rejection level between them. Moreover, other zeros are located either side bandpasses. possibilities offered this structure discussed and measurements presented validate method.

This paper presents a tunable interdigital coplanar filter with tapped-line feedings. Microelectromechanical systems capacitors are used as high contrast capacitive switch between quarter-wavelength resonator and an open-ended stub to perform the frequency shift. A two-pole 13% relative bandwidth has been designed, fabricated, measured. The center can be switched from 18.5 21.05 GHz low return losses (less than 15 dB) insertion (3.5 dB).

We report on a new topology of coupling between substrate integrated circular cavities designed to produce particular filtering functions through combination with the classical iris-based coupling. This is achieved by grounded coplanar line etched at top cavities. was used realize Ku-Band third-order filter, whose synthesis, electromagnetic simulation HFSS, and experimental performances are presented here.

This paper presents the implementation of two-section coaxial stepped impedance resonators (SIRs) solution to control attenuated band Tx bandpass filters. type resonator has two degrees freedom, in transverse and longitudinal dimensions. At a fixed fundamental frequency, this allows dimensions be modulated both location harmonics power handling for space applications. It is therefore possible design filter which harmonic frequencies are not same, leading destructive recombinations band....

In this paper, we discuss the control and suppression of spurious resonances commonly encountered with distributed bandpass filters. The basic idea consists introducing low-pass structures within topologies. By adjusting filter cutoff frequencies, harmonic are attenuated, while maintaining in-band performances. addition, transmission losses may be reduced as insertion technique leads to optimum designs in terms overall size. approach described here is based upon combination classical...

The two topologies and associated syntheses described here are dedicated to the design of capacitive-coupled dual-behavior resonator filters. technique is based on coupling adjacent resonators (DBRs). aim control spurious resonances classical DBR In first technique, inverter replaced with an equivalent scheme composed a set three capacitors, i.e., positive capacitor negative ones in parallel both sides. second relies same principle, but schemes moved along each stub resonators; capacitance...

This paper introduces an effective way to build efficient miniature C-band filters using high-permittivity ceramics. The objective was evaluate the feasibility of such commercial electromagnetic simulators and a conventional fabrication process. For demonstration, substrate integrated waveguide (SIW) technology chosen. Compared with planar solutions, this configuration offers good quality factors electrical performances as consequence. However, its dimensions are large, leading unacceptably...

This letter presents the design of a Ku-band cross-coupled 6 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">th</sup> order inductive post SIW ceramic filter, implemented with novel cross-coupling between cavities 1 and 6, aiming to introduce transmission zeros improve out-band rejections. The originality this is consider an electrical embedded in substrate via parallel-plate waveguide. kind solution allows good isolation access cavities....

This paper deals with a tunable bandpass filter topology which controls independently and simultaneously both the central frequency bandwidth. results from association of MEMS cantilevers, used as variable capacitors, an original passive topology. The latter is based on dual behavior resonators (DBRs), each them constituted low- high-frequency open-ended stubs. associated electrical response characterized by transmission zeros. A millimeter relative bandwidth tunability about 10 75%,...

A new reconfigurable frequency cavity compatible with planar technology has been designed, manufactured and measured. An original tuning solution is proposed, based upon the insertion of vertical capacitive posts integrated within SIW cavities. One extremity each post connected to a floating metallic ring, located on substrate supporting cavity. The agility obtained once ring ground plane by short-circuited corresponding annular slot using surface actuators. Such combination volumetric...

This paper presents the results of fabrication and characterization up to 220 GHz, thin-film microstrip (TFMS) transmission-line structures. The transmission lines are fabricated on a low-resistivity silicon substrate (/spl rho/=10 /spl Omega/ middot/ cm). TFMS with thick dielectric layer (20 mu/m benzocyclobutene is used here) present losses 0.3 dB/mm at 94 GHz 0.6 GHz. Thus, using this technology, it will be possible develop monolithic microwave integrated circuits substrate.

This paper proposes several topologies of filters based on substrate integrated circular cavities (SICCs). SICC works TM modes and the benefits this technology are mainly an increased quality factor a better design flexibility. Filters made from cylindrical into planar fed by microstrip lines through coupling slots. Cavities inter-coupled irises. One-order, second-order third-order presented. Preliminary measurement data compared to those simulations performed with 3-D electromagnetic...

This paper discusses a method used to design planar bandpass filters for millimeter-wave applications in U- and W-band frequency ranges. For technical reasons, these have be implemented on silicon-based technology. So as decrease the insertion losses levels inherent silicon substrate, we propose thin-film microstrip-like technology benzocyclobutene layer. In addition, dual-behavior resonator-based filter topology enabled us fit hardened specification. association with this new topology,...

One of the growing trend in antennas is to address multifunctional systems, providing direct space saving and cost reduction. A consideration for future generation replace classical planar geometry with new functionalities. Three-dimensional (3-D) / conformal offer significant advantages such system. However, traditional manufacturing processes limit their realization. Additive Manufacturing have been identified as very promising solutions overcome dimensional challenge that 3-D components...

This paper reports on the application of dual behavior resonators to design triband filters. The principle is briefly presented by considering monoband, dual-band and A circuit proposed using an approximate synthesis. Then, a hybrid (electromagnetic / circuit) simulation performed take into account parasitic effects induced junction discontinuities allow fast optimization in same time. An example layout with associated simulated experimental results proposed.

This letter deals with a general method and synthesis devoted to the achievement of N-band resonators. The topology is based on dual behavior resonator. Indeed, this kind allows independent control different transmission zeros resonances. Thus, proposed in study consists parallel association N+1 bandstop structures get N bandpasses separated by zero. After introduction synthesis, principle will be validated four-band resonator microstrip technology

This article focuses on the synthesis equations of three-section coaxial stepped impedance resonators (SIRs) for design Tx bandpass filters and benefits adding a third section compared with using two-section SIR. In this topology, three structures fit inside ones another. terms electrical scheme, model is succession sections in cascade, where ground conductor one becomes central core next vice versa. An advantageous property SIRs that they allow size distance from harmonic to be controlled....

This paper describes a concept of stepped impedance resonators (SIR) built from two coaxial structures fitted inside one another. The resonator is out succession sections in cascade, where the ground conductor first central core next, or vice-versa. An advantageous property SIR that they allow substantial reduction size, while keeping away harmonic and without strongly degrading quality factor. After describing theoretical behavior resonator, we will then present specific properties this...

This report describes the design of original planar filters and a diplexer based on dual behavior resonator (DBR) filter, introduces measurement data. The specifications dealt with limited frequency band in Ku-band where high isolation is needed between Rx Tx bands. study evidences benefits oversized DBR particular for getting rejection level. Moreover, folding resonators allows one to keep constant filter overall size. first receiver 3rd-order central, folded, low-frequency stub; second...

This paper deals with miniaturized and wide band bandpass filter. filter is based on an original topology series parallel resonators. Series resonators are realized using open-ended coupled lines resonator implemented stub. hybrid two kinds of stub leads to a twice more compact 5th order design compared the conventional approach. Moreover, use presenting different periodic behaviors implies additional transmission zeros so, enhances rejection Liquid crystal polymer (LCP) chosen by...

This paper presents the first results of fabrication and characterization a biological sensor based on two complementary parts. A microfluidic channel along with micromachined stop-band filter are used to detect type fluid which flows beneath electronic circuit. The tridimensional (3D) structure microstrip technology is integrated using SU8 material thus supports use buried channels. Besides being method without contact, this bio-sensor avoids evaporation, contamination, or label fixation....

This paper proposes an enhanced model for a re-entrant coaxial resonator and analyzes the capacitance behavior between its different sections Q-factor, which mathematical expressions are derived. makes it possible to carry out geometric optimization minimize volume of compact resonator. Theoretical conclusions compared with electromagnetic simulations optimized symmetrical six-pole bandpass filter prototype is designed fabricated illustrate optimization.

This letter presents a fourth-order quasi elliptic bandpass filter based on multilayer technology. Thanks to the use of third dimension, technology appears as very convenient solution when high coupling is required. led us coefficient-based approach design compact through association open-loop resonators and floating metallic patches elevate coupling.