Journal ArticleDOI
Novel compact elliptic-function narrow-band bandpass filters using microstrip open-loop resonators with coupled and crossing lines
Cheng-Cheh Yu,Kai Chang +1 more
TLDR
In this article, two identical microstrip open-loop resonators with coupled and crossing lines have been designed and fabricated for elliptic-function narrow-band bandpass filters with a measured 3dB bandwidth of 2% and two deep notches in its stopband.Abstract:
Novel compact elliptic-function narrow-band bandpass filters have been designed and fabricated. This new configuration consists of two identical microstrip open-loop resonators with coupled and crossing lines. A theoretical investigation has confirmed that this novel configuration is capable of providing elliptic-function filtering. Furthermore, the feasibility of this filter is verified experimentally. Centered at 2.039 GHz, the fabricated microstrip bandpass filter shows a measured 3-dB bandwidth of 2% and two deep notches in its stopband. In addition, the main circuit of this filter occupies only 2.5 cm/spl times/1.5 cm using a substrate with dielectric constant of 10.5, making it very attractive for applications in the mobile and personal communication systems (PCS's).read more
Citations
More filters
Journal ArticleDOI
Design of highly selective microstrip bandpass filters with a single pair of attenuation poles at finite frequencies
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.
Journal ArticleDOI
New compact bandpass filter using microstrip /spl lambda//4 resonators with open stub inverter
TL;DR: In this article, a bandpass filter using microstrip quarter-wavelength resonators is proposed, which consists of the open stub inverter between quarter wavelength resonators, which results in a compact design and low loss.
Journal ArticleDOI
Miniaturized microstrip and CPW filters using coupled metamaterial resonators
Joan Garcia-Garcia,Jordi Bonache,Ignacio Gil,Ferran Martin,Maria C. Velazquez-Ahumada,Jesus Martel +5 more
TL;DR: In this paper, the coupling coefficients of metamaterial resonators are analyzed in detail, and a method to identify this coupling is proposed, and several prototype device filters operative at S-band are provided to illustrate the proposed techniques.
Proceedings Article
Miniaturized microstrip and CPW filters using coupled metamaterial resonators
Joan Garcia-Garcia,Jordi Bonache,Ignacio Gil,Ferran Martin,Maria C. Velazquez-Ahumada,Jesus Martel +5 more
TL;DR: In this article, the coupling coefficients of metamaterial resonators are analyzed in detail, and a method to identify this coupling is proposed, and several prototype device filters operative at S-band are provided to illustrate the proposed techniques.
Journal ArticleDOI
Microwave ring resonator-based non-contact interface sensor for oil sands applications
TL;DR: In this article, a non-contact microwave resonator sensor for liquid-liquid interface detection is presented, where the core of the sensor is a microwave planar ring resonator tuned at 5.25 GHz with a Q factor of 180.
References
More filters
Journal ArticleDOI
Handbook of Mathematical Functions
Journal ArticleDOI
Couplings of microstrip square open-loop resonators for cross-coupled planar microwave filters
TL;DR: In this article, a cross-coupled planar microwave filter using coupled microstrip square open-loop resonators is proposed, and a method for the rigorous calculation of the coupling coefficients of three basic coupling structures encountered in this type of filter is developed.
Book
Microwave Ring Circuits and Antennas
TL;DR: In this paper, the authors present an analysis and modeling of ring resonators modes and coupling methods, including ring couplers and waveguide ring cavities and filter ring antennas.
Journal ArticleDOI
Hairpin-Line and Hybrid Hairpin-Line/Half-Wave Parallel-Coupled-Line Filters
E.G. Cristal,S. Frankel +1 more
TL;DR: In this paper, a new class of microwave filters, hairpin line and hybrid hairpin-line/half-wave parallel-coupled-line filters, was reported, which is particularly well suited for microstrip and TEM printed-circuit realizations because grounding of the filter resonators is generally not required.