Synthesis of a Class of Strip-Line Filters

Ozaki, Hiroshi; Ishii, Junya

doi:10.1109/tct.1958.1086441

Cited by 111 publications

(21 citation statements)

References 5 publications

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“…Applying the definitions and parameters of a 3-port coupled-line section given by [12–14], a simplified circuit diagram of the reconfigured ring resonator is constructed as shown in Figure 2(a).…”

Section: Design Of Reconfigurable Ring Filtermentioning

confidence: 99%

Reconfigurable Ring Filter with Controllable Frequency Response

Wahab

Salleh

Khan

et al. 2014

The Scientific World Journal

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Reconfigurable ring filter based on single-side-access ring topology is presented. Using capacitive tuning elements, the electrical length of the ring can be manipulated to shift the nominal center frequency to a desired position. A synthesis is developed to determine the values of the capacitive elements. To show the advantage of the synthesis, it is applied to the reconfigurable filter design using RF lumped capacitors. The concept is further explored by introducing varactor-diodes to continuously tune the center frequency of the ring filter. For demonstration, two prototypes of reconfigurable ring filters are realized using microstrip technology, simulated, and measured to validate the proposed concept. The reconfigured filter using lumped elements is successfully reconfigured from 2 GHz to 984.4 MHz and miniaturized by 71% compared to the filter directly designed at the same reconfigured frequency, while, for the filter using varactor-diodes, the frequency is chosen from 1.10 GHz to 1.38 GHz spreading over 280 MHz frequency range. Both designs are found to be compact with acceptable insertion loss and high selectivity.

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Section: Design Of Reconfigurable Ring Filtermentioning

confidence: 99%

Reconfigurable Ring Filter with Controllable Frequency Response

Wahab

Salleh

Khan

et al. 2014

The Scientific World Journal

View full text Add to dashboard Cite

show abstract

“…Starting from the definitions and parameters of a 3-port coupled-lines given by [11][12][13], a simplified circuit diagram of the ring resonator can be constructed and shown in Figure 3. The definition of the elements in the diagram such as the transformer T , the unit element Y ue and the coupling capacitor Y c are given in Appendix.…”

Section: Equivalent Circuit Of the Ring Resonatormentioning

confidence: 99%

Synthesis of a Single Side Access Ring Resonator for Higher Order Bandpass Filters

et al. 2013

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Abstract-A single-side-access ring resonator topology is presented. It employs a single quarter-wavelength coupled-line that couples to a one-wavelength ring to exhibit a single-mode resonance with transmission zeros. A global synthesis is presented, in order to control the transmission zeros in its response. As the transmission zeros of the ring resonator maintains their positions when multiple identical rings are used, the global synthesis can further be used for the design of higher order filters with multiple rings. Furthermore, since only one coupled-line is used in the resonator topology, only one section of line is present in the ring, other than the coupled-line. Hence, there will be no second section of the ring that needs to be adjusted to obtain the symmetrical response during its realization, as compared to other types of ring topologies. To show the advantage of the synthesis, it is applied in the design of higher order ring-based bandpass filters, which also involve extra quarter-wavelength coupled-lines to create additional poles. Five bandpass ring filters up to 5th-order were realized using microstrip technology, and measured to validate the proposed concept. Measurement results showing good agreement with those from the simulation are also presented throughout the paper.

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“…The values of the lumped element can be approximated with distributed elements. Richard's transformation [5] is used to convert lumped elements to transmission line section, while Kuroda's identities [6] can be used to separate filter elements by using transmission sections.…”

Section: Circuit Designmentioning

confidence: 99%

Design of a Parallel Coupled Microstrip Line Bandpass Filter on the RO4003C® Substrate

Hock

Chakrabarty

2006

2006 International RF and Microwave Conference

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This paper describes the improvement of the artwork for a microwave circuit in order to have the dimensions of the desired physical realization. In highlighting the general modification, a fifth order parallel edge-coupled bandpass filter is designed and analyzed. The filter design, in most cases, is complicated by the presence of the physical constraint as the resulting artwork is not easily fabricated. Hence, the filter is designed to have matching stubs in order to ease the circuit fabrication. In designing the circuit, electronics design automation tool with filter synthesis wizard and optimizing features is used. The circuit is implemented on microstrip line technology and R04003C ® substrate is used.

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Synthesis of a Class of Strip-Line Filters

Cited by 111 publications

References 5 publications

Reconfigurable Ring Filter with Controllable Frequency Response

Reconfigurable Ring Filter with Controllable Frequency Response

Synthesis of a Single Side Access Ring Resonator for Higher Order Bandpass Filters

Design of a Parallel Coupled Microstrip Line Bandpass Filter on the RO4003C® Substrate

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