# Coplanar waveguide circuits, components, and systems

##### Citations

^{1}, University of Sydney

^{2}, Yale University

^{3}, ETH Zurich

^{4}

773 citations

### Cites background from "Coplanar waveguide circuits, compon..."

... described by its characteristic impedance Zr= p l0=c0 and the speed of light in the waveguide v0 = 1= p l0c0, where we have introduced the capacitance to ground c0 and inductance l0 per unit length (Simons, 2001). Typical values of these parameters are Zr˘50 and v0 ˘1:3 108 m/s, or about a third of the speed of light in vacuum (Goppl et al., 2008). For a given substrate, metal thickness and center conductor ...

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...s, 2001). In the coplanar waveguide geometry, transmission lines of constant impedance Zr can therefore be realized for varying center conductor width wby keeping the ratio of w=sclose to a constant (Simons, 2001). This allows the experimenter to fabricate a device with large wat the edges for convenient interfacing, and small waway from the edges to minimize the mode volume or simply for miniaturization. A re...

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...coplanar waveguide of nite length formed by a center conductor of width wand thickness t, separated on both sides by a distance sfrom a ground plane of the same thickness, see Fig. 2(a) (Pozar, 2012; Simons, 2001). Both conductors are typically deposited on a low-loss dielectric substrate of permittivity "and thickness much larger than the dimensions w;s;t. This planar structure acts as a transmission lin...

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^{1}

632 citations

### Cites methods from "Coplanar waveguide circuits, compon..."

...Such a transmission line configuration has been utilized in highfrequency circuits [19] as well as in the high-frequency evaluation of nanodevices such as carbon nanotubes [20], nanowires [21], and graphene [22]....

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307 citations

### Cites methods from "Coplanar waveguide circuits, compon..."

...which consist of high- thin-film microwave resonators, using coplanar waveguide transmission lines [144] for example....

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289 citations

245 citations

### Cites background from "Coplanar waveguide circuits, compon..."

...The resonance at 2fr is very likely to come from the coupled slotline mode (also called the odd mode) of CPW line[71]....

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##### References

910 citations

264 citations

### "Coplanar waveguide circuits, compon..." refers background or methods in this paper

...[21] Agilent Technologies, Santa Clara, California....

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...In addition electromagnetic simulation software for 2-D and 3-D structures have also become commercially available [21] to [25]....

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...In [20] and [21] the CPW was analyzed by modeling the structure as a capacitive iris in a rectangular waveguide....

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...The computed is based on the model reported in [21]....

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160 citations

### "Coplanar waveguide circuits, compon..." refers background in this paper

...However, in the analysis presented in [45], [46] and [47] conductor thickness is taken into account....

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...In [45] it has been shown that the effect of t on Z is smaller for substrates of higher dielectric constant....

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...CPW MEMS shunt switches with good insertion loss characteristics, reasonable switching voltages, fast switching speed, and excellent linearity have recently been demonstrated [45]....

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...the conductors are located on the top surface of a substrate which makes it ideally suited for fabricating metal membrane, capacitive, shunt-type switches [45]....

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...In [45] it has been shown that the effect of t on is larger for substrates of higher dielectric constant....

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153 citations

146 citations

### "Coplanar waveguide circuits, compon..." refers background in this paper

...The CPW amplifier circuits include millimeter-wave amplifiers [26], [27], distributed amplifiers [28], [29], cryogenically cooled amplifiers [30], cascode amplifiers [31], transimpedance amplifiers [32], dual gate HEMT amplifiers [33], and low-noise amplifiers [34]....

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...A similar set of equations was presented in [29]....

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...A practical solution to this problem is to tie the top ground plane to the bottom conductor by metal-filled via holes [8], [28], [29]....

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