Circuit model for slotline-to-coplanar waveguideasymmetrical transitions

Ribó, M.; Cruz, Joel De La; Pradell, L.

doi:10.1049/el:19990779

Cited by 10 publications

(4 citation statements)

References 4 publications

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“…Again, by controlling the values of Z A and Z B by means of MEMS switches, the amount of energy transfer among modes can be controlled. This transition and other described in [38][39][40] are the base for building multimodal uniplanar reconigurable circuits [6,[9][10][11]58] using MEMS switches.…”

Section: Asymmetric Shunt Impedances In a Cpwmentioning

confidence: 94%

“…In case of multimodal transmission lines like CPW, they can be used to selectively control the two CPW fundamental propagation modes (even and odd) [36]. To accurately analyze the interaction between modes in complex uniplanar structures (transitions, discontinuities), multimodal circuit models are derived from the application of the general multimodal theory [37][38][39][40]. Moreover, suitable equivalent circuits for both (ON/OFF) states of the switch can be obtained and integrated in the multimodal models.…”

Section: Introductionmentioning

confidence: 99%

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MEMS Sensors - Design and Application

Yellampalli¹

2018

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Radio frequency microelectromechanical system (RF-MEMS) switches have demonstrated superior electrical performance (lower loss and higher isolation) compared to semiconductor-based devices to implement reconigurable microwave and millimeter (mm)-wave circuits. In this chapter, electrostatically actuated RF-MEMS switch conigurations that can be easily integrated in uniplanar circuits are presented. The design procedure and fabrication process of RF-MEMS switch topologies able to control the propagating modes of multimodal uniplanar structures (those based on a combination of coplanar waveguide (CPW), coplanar stripline (CPS), and slotline) will be described in detail. Generalized electrical (multimodal) and mechanical models will be presented and applied to the switch design and simulation. The switch-simulated results are compared to measurements, conirming the expected performances. Using an integrated RF-MEMS surface micromachining process, high-performance multimodal reconigurable circuits, such as phase switches and ilters, are developed with the proposed switch conigurations. The design and optimization of these circuits are discussed and the simulated results compared to measurements.

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Section: Asymmetric Shunt Impedances In a Cpwmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

MEMS Sensors - Design and Application

Yellampalli¹

2018

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show abstract

“…Again, by controlling the values of Z A and Z B by means of MEMS switches, the amount of energy transfer among modes can be controlled. This transition and other described in [38][39][40] are the base for building multimodal uniplanar reconfigurable circuits [6,[9][10][11]58] using MEMS switches.…”

Section: Asymmetric Shunt Impedances In a Cpwmentioning

confidence: 94%

RF-MEMS Switches Designed for High-Performance Uniplanar Microwave and mm-Wave Circuits

Pradell¹,

Girbau²,

Ribó³

et al. 2018

MEMS Sensors - Design and Application

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Radio frequency microelectromechanical system (RF-MEMS) switches have demonstrated superior electrical performance (lower loss and higher isolation) compared to semiconductor-based devices to implement reconfigurable microwave and millimeter (mm)-wave circuits. In this chapter, electrostatically actuated RF-MEMS switch configurations that can be easily integrated in uniplanar circuits are presented. The design procedure and fabrication process of RF-MEMS switch topologies able to control the propagating modes of multimodal uniplanar structures (those based on a combination of coplanar waveguide (CPW), coplanar stripline (CPS), and slotline) will be described in detail. Generalized electrical (multimodal) and mechanical models will be presented and applied to the switch design and simulation. The switch-simulated results are compared to measurements, confirming the expected performances. Using an integrated RF-MEMS surface micromachining process, high-performance multimodal reconfigurable circuits, such as phase switches and filters, are developed with the proposed switch configurations. The design and optimization of these circuits are discussed and the simulated results compared to measurements.

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“…It is then connected to the CPS through the series metal strip inductor or interdigital capacitor. Their corresponding equivalent-circuit models can be constructed in a similar way as type-I transitions, with the CPW-CPS cross-junction model being replaced by the asymmetric-junction model [21]. Within the realizable range of lumped elements, these transitions may provide impedance transformation to any complex load impedance within the Smith chart.…”

Section: B Type-ii Structuresmentioning

confidence: 99%

Lumped-Element Impedance-Transforming Uniplanar Transitions and Their Antenna Applications

Lin

Chen

2004

IEEE Trans. Microwave Theory Techn.

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Novel impedance-transforming coplanar waveguide (CPW)-to-coplanar stripline transitions and CPW-to-slotline transitions are proposed, using planar lumped elements to realize the -section impedance-matching network in the transition structures. Simple equivalent-circuit models based on closed-form expressions are also established, from which various lumped-element impedance-transforming transitions are investigated. Examples for using the proposed transitions in the design of antenna feeding structures are also demonstrated, and successful size reduction has been achieved.

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Circuit model for slotline-to-coplanar waveguideasymmetrical transitions

Cited by 10 publications

References 4 publications

MEMS Sensors - Design and Application

MEMS Sensors - Design and Application

RF-MEMS Switches Designed for High-Performance Uniplanar Microwave and mm-Wave Circuits

Lumped-Element Impedance-Transforming Uniplanar Transitions and Their Antenna Applications

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