Multilayer MMIC using a 3 mu m*3-layer dielectric film structure

Tokumitsu, T.; Hiraoka, T.; Nakamoto, Hiroyuki; Takenaka, T.

doi:10.1109/mwsym.1990.99708

Cited by 89 publications

(29 citation statements)

References 3 publications

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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%

“…The meander-like line is also effective for circuit miniaturization [2]. However, in general planar formed MMICs, the line spacing is required to be two to three times the substrate thickness, so that miniaturization is limited.…”

Section: Methods For Circuit Miniaturizationmentioning

confidence: 99%

“…The operation and miniaturization of the proposed hybrid circuit are evaluated. Figure 11 shows a conventional branch-line hybrid circuit [2] for size comparison with the proposed branch- The circuit is designed for 15 GHz. When the circuit is designed for 10 GHz, the intrinsic circuit area is estimated to be 1.05 mm × 1.5 mm.…”

Section: Branch-line Hybrid Circuitmentioning

confidence: 99%

“…In addition, the parasitic reactance at the bends can affect the high-frequency operation of the circuit. In contrast, methods have been proposed for miniaturizing the circuit by forming a high-density meander line with a thin-film substrate [2][3][4]. Also, a method of reducing the circuit size by reduction of the transmission line length using a high-impedance transmission line and two shunt capacitors has been reported [5].…”

Section: Introductionmentioning

confidence: 99%

“…The fabricated branch-line hybrid circuit makes use of the QD-TFMS lines. In comparison with the conventional branch-line hybrid circuit using meanderformed TMFS line [2], the circuit realized in this paper is reduced to less than 20% in terms of area. The authors have previously reported the basic configuration and the characteristics of the QD-TFMS line and the branch-line hybrid circuit based on this line [12].…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

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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