A very small, low-loss MMIC rat-race hybrid using elevated coplanar waveguides

Kamitsuna, H.

doi:10.1109/75.153606

Cited by 37 publications

(18 citation statements)

References 4 publications

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“…Mathematically, the governing partial differential equations are given by (ii) On the ground planes: on MG, HI, and JN (12) vl = V2 = 0 on EK and LF ( 5 ) (iii) On the conducting strips under even-mode where ii,, represents the unit normal vector at the dielectric-substrate and dielectric-air interfaces. With respect to the e n e r g distribution, the EC-CPW structure is symmetrical about the axis, as shown in Figure 2.…”

Section: Mathematical Formulationmentioning

confidence: 99%

Analysis of a shielded elevated coupled coplanar waveguide using a modified finite element method

Raju

Nityanandan

Abhaikumar

1996

Int. J. Microw. Mill.-Wave Comput.-Aided Eng.

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Section: Mathematical Formulationmentioning

confidence: 99%

Analysis of a shielded elevated coupled coplanar waveguide using a modified finite element method

Raju

Nityanandan

Abhaikumar

1996

Int. J. Microw. Mill.-Wave Comput.-Aided Eng.

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“…1) is shown in Fig. 5 for varying linewidth and constant ground-to-ground spacing of 200 m. Due to the lower effective permittivity, higher transmissionline impedances can be achieved with the same linewidth compared to standard coplanar lines placed directly on the substrate [10]. Center conductor widths larger than 200 m are overlapping the ground plane and, therefore, approach the structure of thin-film microstrip lines.…”

Section: B Mode-matching Techniquementioning

confidence: 99%

“…As a material with mature technology, silicon is increasingly used for higher frequencies as well, both on standard silicon (5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17)(18)(19)(20) cm) as well as on high-resistivity silicon ( 1000 cm) [1], [2], [17].…”

Section: Onolithic Microwave Integrated Circuits (Mmic's)mentioning

confidence: 99%

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Transmission lines and passive elements for multilayer coplanar circuits on silicon

Warns

Menzel

Schumacher

1998

IEEE Trans. Microwave Theory Techn.

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Abstract-In this paper, propagation properties of both standard and multilayer coplanar lines on different types of silicon substrates, as well as a number of quasi-lumped and stub-type circuit elements, are investigated. For the transmission lines, emphasis is placed on losses. As examples for circuit elements, a lumped parallel resonator and a high-low impedance low-pass filter are demonstrated.

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“…Many circuit miniaturization methods have been proposed to date, including methods using capacitor loading [5,[13][14][15], methods using a meander-like line [2][3][4]16], methods using stubs [17,18], a method using coupled lines [19], and a method using space-filling curves [20]. Hirota and colleagues have proposed a transmission line using a short high-impedance line and two lumped elements (capacitors) [5].…”

Section: Methods For Circuit Miniaturizationmentioning

confidence: 99%

Miniaturized branch‐line hybrid circuit using 3D MMIC quasi‐distributed TFMS lines

Tanaka¹,

Nishikawa²,

Aikawa³

2006

Electron Comm Jpn Pt II

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SUMMARYThis paper discusses a miniaturized branch-line hybrid circuit consisting of quasi-distributed TFMS lines, making use of the topological characteristics of the threedimensional MMIC. In the three-dimensional MMIC, it is possible to reduce the coupling between adjacent transmission lines due to their very fine structure. Hence, miniaturized meander-like lines can easily be realized. Further, due to the stacking effect in this technique, MIM (metal-insulator-metal) capacitors can easily be installed into the transmission line. In this paper, by utilizing these effects, a transmission line consisting of high-impedance TFMS lines and MIM capacitors is proposed. The TFMS line of this type is here called a QD-TFMS (Quasi-Distributed Thin Film MicroStrip) line. First, the characteristics of the QD-TFMS line are obtained by simulation and the size reduction effect is verified. Further, miniaturization of the branch-line hybrid circuit using the QD-TFMS lines is discussed. It is demonstrated that the fabricated circuit can be miniaturized to an area ratio of less than 20% in comparison with a branch-line hybrid circuit using only meander-like lines.

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A very small, low-loss MMIC rat-race hybrid using elevated coplanar waveguides

Cited by 37 publications

References 4 publications

Analysis of a shielded elevated coupled coplanar waveguide using a modified finite element method

Analysis of a shielded elevated coupled coplanar waveguide using a modified finite element method

Transmission lines and passive elements for multilayer coplanar circuits on silicon

Miniaturized branch‐line hybrid circuit using 3D MMIC quasi‐distributed TFMS lines

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