Half Mode Microwave Filters Based on Epsilon Near Zero and Mu Near Zero Concepts

Lopez-Garcia, Benjamin; Murthy, D. V. B.; Corona‐Chávez, Alonso

doi:10.2528/pier10100707

Cited by 12 publications

(7 citation statements)

References 29 publications

(44 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Such an effect can be obtained by coupling a narrow-height waveguide in its propagation mode. Although the coupling is originally made using different-height waveguides to produce squeezing of the energy along the tunnel [7], it is demonstrated that, over the planar SIW technology, the effect can be obtained using transmission lines as coupling elements [17], [18].…”

Section: B Sensor-b (Siw Tunnel Sensor)mentioning

confidence: 99%

Wireless Sensing of Complex Dielectric Permittivity of Liquids Based on the RFID

Lobato‐Morales

Corona‐Chávez

Olvera‐Cervantes

et al. 2014

IEEE Trans. Microwave Theory Techn.

Self Cite

View full text Add to dashboard Cite

A wireless sensing system for the evaluation of the complex dielectric permittivity of solvent liquids is presented. Two sensing tags are proposed for testing of the samples. The first tag is based on a cavity resonator and the second makes use of the epsilon-near-zero effect. Both circuits are designed over the planar substrate-integrated-waveguide (SIW) technology, and operate at 4 GHz. A quartz capillary tube is used for the liquid measurements where only a small amount of sample volume is required. With the addition of planar antennas at the input and output of the sensors, the complete system is implemented for wireless sensing of the materials following the RF identification scheme. The cavity perturbation technique for SIW structures is applied for the dielectric liquid characterization. The proposed sensing tags and system have high potentials for low-cost wireless measurements and real-time monitoring applications.

show abstract

Section: B Sensor-b (Siw Tunnel Sensor)mentioning

confidence: 99%

Wireless Sensing of Complex Dielectric Permittivity of Liquids Based on the RFID

Lobato‐Morales

Corona‐Chávez

Olvera‐Cervantes

et al. 2014

IEEE Trans. Microwave Theory Techn.

Self Cite

View full text Add to dashboard Cite

show abstract

“…Although the methodologies for designing filters of various configurations have been known for decades, researchers are still introducing new solutions [1][2][3][4][5][6][7][8]. Depending on filter technology, frequency band and production quality filters have to be tuned or are ready for use directly after manufacturing.…”

Section: Introductionmentioning

confidence: 99%

Inverse Modeling in Application for Sequential Filter Tuning

Michalski¹

2011

PIER

View full text Add to dashboard Cite

Abstract-This paper presents a new method of sequential microwave filter tuning.For filters with R tuning elements (including cavities, couplings and cross-couplings), based on physically measured scattering characteristics in the frequency domain, the Artificial Neural Network (ANN) is used to build inverse models of R sub-filters. Each sub-filter is associated to one tuning element. The sub-filters are obtained by successive opening or shorting of resonators and by removing coupling screws. For each sub-filter, the ANN training vectors are defined as physical reflection characteristics (input vectors) and the corresponding positions of the tuning element, which is detuned, in both directions, from its proper setting (output vectors). In the tuning process, such inverse models are used for calculating the tuning element increments needed for setting the tuning element in the proper position. The tuning experiment, conducted on 8-and 11-cavity filters, has shown the performance of the presented method.

show abstract

“…The methodologies for designing microwave filters are known for a long time but a lot of researchers are still introducing new solutions (cf. [7][8][9][10][11][12][13][14]). In this paper, we are focusing on the related problem of coupling coupling matrix extraction.…”

Section: Introductionmentioning

confidence: 99%

The Analytic Extraction of the Complex-Valued Coupling Matrix and Its Application in the Microwave Filter Modeling

Gulgowski¹,

Michalski²

2012

PIER

View full text Add to dashboard Cite

Abstract-The idea behind the coupling matrix identification is to find the coupling matrix corresponding to the measured or designed scattering characteristics of the microwave filter. The typical attitude towards coupling matrix parameter extraction is to use some optimization methods to minimize the appropriate cost function. In this paper, we concentrate on the analytic solutions -how they may be found and their application in further optimization processes. In general case, the suggested method generates complex-valued coupling matrix. For a special case of the filter without cross-couplings we give fast and simple recursive method of finding such complexvalued coupling matrix. The method is based on Laplace's formula for expanding the determinant. The complex-valued coupling matrix is used as a good starting point for the optimization methods to find the regular coupling matrix. The examples are presented showing that the optimization arrives to global minimum starting from real parts of complex-valued entries considerably more often than when the starting point is selected randomly.

show abstract

Half Mode Microwave Filters Based on Epsilon Near Zero and Mu Near Zero Concepts

Cited by 12 publications

References 29 publications

Wireless Sensing of Complex Dielectric Permittivity of Liquids Based on the RFID

Wireless Sensing of Complex Dielectric Permittivity of Liquids Based on the RFID

Inverse Modeling in Application for Sequential Filter Tuning

The Analytic Extraction of the Complex-Valued Coupling Matrix and Its Application in the Microwave Filter Modeling

Contact Info

Product

Resources

About