The Feedback-Based Orthogonal Filter Structure

The filter is required in all RF-communication techniques. Low Pass Filters play an important role in wireless power transmission systems. Transmitted and received signals have to be filtered at a certain frequency with a specific bandwidth. In this paper the design of filter is done in the ISM (Industrial, Scientific and Medical) band whose frequency lies between 1.55GHz- 3.99GHz. After getting the specifications required, we realized the filter structure with the help of CST-MW software.

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The implementation of the generalized Lagrange FIR filter structure defined over finite fields or rings

10.1109/icassp.1986.1169294 ◽

2005 ◽

Author(s):

R. Krishnan ◽

G. Jullien ◽

W. Miller

Keyword(s):

Finite Fields ◽

Fir Filter ◽

Filter Structure

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Design of Microwave Multibandpass Filters with Quasilumped Resonators

Mathematical Problems in Engineering ◽

10.1155/2015/647302 ◽

2015 ◽

Vol 2015 ◽

pp. 1-14 ◽

Cited By ~ 2

Author(s):

Dejan Miljanović ◽

Milka Potrebić ◽

Dejan V. Tošić

Keyword(s):

Filter Design ◽

Three Dimensional ◽

Design Procedure ◽

Electric Circuit ◽

Microwave Filters ◽

Coupled Resonators ◽

Circuit Element ◽

Filter Structure ◽

3D Em ◽

Physical Dimensions

Design of RF and microwave filters has always been the challenging engineering field. Modern filter design techniques involve the use of the three-dimensional electromagnetic (3D EM) solvers for predicting filter behavior, yielding the most accurate filter characteristics. However, the 3D EM simulations are time consuming. In this paper, we propose electric-circuit models, instead of 3D EM models, suitable for design of RF and microwave filters with quasilumped coupled resonators. Using the diakoptic approach, the 3D filter structure is decomposed into domains that are modeled by electric networks. The coupling between these domains is modeled by capacitors and coupled inductors. Furthermore, we relate the circuit-element values to the physical dimensions of the 3D filter structure. We propose the filter design procedure that is based on the circuit models and fast circuit-level simulations, yielding the element values from which the physical dimensions can be obtained. The obtained dimensions should be slightly refined for achieving the desired filter characteristics. The mathematical problems encountered in the procedure are solved by numerical and symbolic computations. The procedure is exemplified by designing a triple-bandpass filter and validated by measurements on the fabricated filter. The simulation and experimental results are in good agreement.

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A filter structure designing for an EAS system

Electronics and Electrical Engineering ◽

10.1201/b18443-60 ◽

2015 ◽

pp. 311-315

Author(s):

Min Lin ◽

Jianliang Jiang

Keyword(s):

Filter Structure

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Sharpening of the multistage modified comb filters

Serbian Journal of Electrical Engineering ◽

10.2298/sjee1103281n ◽

2011 ◽

Vol 8 (3) ◽

pp. 281-291 ◽

Cited By ~ 6

Author(s):

Marko Nikolic ◽

Miroslav Lutovac

Keyword(s):

Comb Filter ◽

Polyphase Filter ◽

Filter Structure ◽

Direct Form ◽

Comb Filters ◽

Decimation Filter ◽

Last Stage ◽

Positive Integers

This paper describes the application of filter sharpening method to the modified comb filter (MCF) in the case of decimation factor, which is product of two or more positive integers. It is shown that in the case of multistage decimation with MCF, filters in each stage are also MCF. Applying the sharpening to the decimation filter in the last stage provides very good results, with savings in the number of operations comparing to the case of sharpening of the complete filter. Direct-form FIR polyphase filter structure is proposed for the filters in each stage.

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