Synthesis of inline filters with arbitrarily placed attenuation poles by using nonresonating nodes

Amari, S.; Macchiarella, Giuseppe

doi:10.1109/tmtt.2005.855128

Cited by 159 publications

(73 citation statements)

References 11 publications

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“…The second group of techniques uses bandstop elements to realize both transmission and in-band reflection zeros. These elements are frequently connected to the filter via non-resonating nodes (NRN) [3], in order to facilitate the design and manufacture of the structure.…”

Section: Introductionmentioning

confidence: 99%

Capacitive Obstacle Realizing Multiple Transmission Zeros for In-Line Rectangular Waveguide Filters

Carceller

Soto

Boria

et al. 2016

IEEE Microw. Wireless Compon. Lett.

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Abstract-This paper presents a capacitive obstacle for rectangular waveguide filters capable of realizing multiple transmission zeros (TZs). By combining a capacitive window with multiple thin stubs, a filter designer has the ability to control the total coupling implemented by the obstacle, and the frequency location of the TZs generated. The resulting structure is compact, and can be employed at the input/output and intermediate stages of direct-coupled-resonator filters. This letter includes a parametric analysis of the obstacle and practical design guidelines. To validate its practical application, an in-line five-pole filter realizing three TZs has been successfully realized.

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Section: Introductionmentioning

confidence: 99%

Capacitive Obstacle Realizing Multiple Transmission Zeros for In-Line Rectangular Waveguide Filters

Carceller

Soto

Boria

et al. 2016

IEEE Microw. Wireless Compon. Lett.

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“…Note that by combining the above ideas, it is possible to implement a more advanced filter structure. The strategy is to combine the trisection block with positive couplings, with a NRN to produce a transmission zero based on the spurious resonance concept [7]. First, a first order design with one transmission zero placed below the passband was implemented by using one NRN (Fig.…”

Section: Theory and Resultsmentioning

confidence: 99%

“…The use of NRN increases the flexibility, and allows to better control the position of the transmission zeros implemented by a specific filtering structure. An example can be found in [6], [7], where out-oftune resonators inside the passband are used to implement transmission zeros.…”

Section: Introductionmentioning

confidence: 99%

Novel Broadside Trisection Filters Employing Nonresonating Nodes

Martinez-Mendoza

Casamichana

Perez-Soler

et al. 2008

2008 38th European Microwave Conference

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Abstract-This work presents novel filter topologies implemented in microstrip technology. The topologies combine printed line resonators with non resonating nodes (NRN) to implement transmission zeros in a very flexible way. Depending on the number of resonators and NRN, the filtering response exhibits a single transmission zero either below or above the passband, or two transmission zeros, one at each side of the passband. Several examples are designed and validated, using the new proposed structures.

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“…With this technique, the transmission zeros are realized using bandstop elements. Combined with the use of nonresonating nodes [3]- [5], this design methodology becomes highly modular, although it still involves an important amount of optimization to obtain the structure physical dimensions.…”

mentioning

confidence: 99%

Design of Hybrid Folded Rectangular Waveguide Filters With Transmission Zeros Below the Passband

Carceller

Soto

Boria

et al. 2016

IEEE Trans. Microwave Theory Techn.

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Abstract-The design and physical implementation of hybrid folded rectangular waveguide (HFRW) filters providing multiple transmission zeros (TZs) below the passband are considered in this paper. These structures offer great flexibility to locate the TZs in a wide frequency range. Different implementations have been considered, each one offering certain advantages in terms of ease of manufacture, number of TZs and their separation from the passband. A simple design procedure for these structures is also described. Measurements of a manufactured 5-pole filter prototype, and simulations (obtained with several available commercial software tools) for different triplet sections, fully validate the novel configurations proposed in this work.

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Synthesis of inline filters with arbitrarily placed attenuation poles by using nonresonating nodes

Cited by 159 publications

References 11 publications

Capacitive Obstacle Realizing Multiple Transmission Zeros for In-Line Rectangular Waveguide Filters

Capacitive Obstacle Realizing Multiple Transmission Zeros for In-Line Rectangular Waveguide Filters

Novel Broadside Trisection Filters Employing Nonresonating Nodes

Design of Hybrid Folded Rectangular Waveguide Filters With Transmission Zeros Below the Passband

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