Multilayer MMIC branch-line hybrid using thin dielectric layers

Banba, S.; Hasegawa, Tsuyoshi; Ogawa, H.

doi:10.1109/75.93907

Cited by 33 publications

(8 citation statements)

References 5 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%

“…Other reported configuration methods for the branchline hybrid circuits include that of Hirota in which the line length is shortened by loading two shunt capacitors into a high-impedance line [5], that using two loading shunt capacitors and a high-impedance line (with a meandering) in Ref. 2, that using meander-like lines proposed by Banba [3], a circuit using radial stubs [17], and a circuit using space-filling curves [20]. Table 1 shows a comparison of the intrinsic circuit areas of these circuits.…”

Section: Branch-line Hybrid Circuit Using Qd-tfms Linesmentioning

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%

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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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Section: Methods For Circuit Miniaturizationmentioning

confidence: 99%

Section: Branch-line Hybrid Circuit Using Qd-tfms Linesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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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“…By using the expression for the T-model in [17], we can express the design equations for the miniaturized branch-line coupler of reduced quarter-wavelength line as been shown in Equation (2)-Equation (3).…”

Section: Coupler Structurementioning

confidence: 99%

“…In fact, branchline couplers are widely implemented using stripline [2], multilayer structures [3], microstrip [4], and finite-ground coplanar waveguide [5]. The coupler employs a quarter-wave length transformers to develop a simple square-shaped configuration that is used for power dividing or power combining functions.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Size Branch Line Coupler Using Open Stubs With High-Low Impedances

Elhiwairis¹,

Rahim²,

Chude-Okonkwo³

et al. 2011

PIER Letters

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Abstract-In this paper, a miniaturized branch-line coupler is proposed. The topology of the circuit is designed using novel design of T-model approach with open stubs with high-low impedances, which provides necessary bandwidth for WLAN band at 2.45 GHz. The miniaturized branch-line coupler is designed and fabricated with a low-cost FR4 substrate as a platform in producing significantly reduction by more than 64.21% compared to the conventional coupler on inexpensive board. Furthermore, the coupler can equally divide the input signal with 90 • phase of difference while maintaining the initial power from the source.

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On a reduced branch‐line coupler with two‐step stubs considering a spurious notch

Shao-zhou

Tokuno

Iwata

et al. 2002

Electron Comm Jpn Pt II

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SUMMARYIn a reduced branch-line coupler that is designed with two-step stubs such that the area occupancy on the substrate is 25% of the standard branch-line coupler, a sudden variation (spurious notch) occurs at a certain frequency in the frequency range higher than the center frequency. In this paper, the mechanism of generation of the spurious notch is investigated by using the eigenmode impedance obtained by mode decomposition. A circuit design that does not generate a spurious notch while maintaining the area ratio of 25% is developed. Next, by means of an experimental circuit, the effectiveness of the method is verified.

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Multilayer MMIC branch-line hybrid using thin dielectric layers

Cited by 33 publications

References 5 publications

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

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

Miniaturized Size Branch Line Coupler Using Open Stubs With High-Low Impedances

On a reduced branch‐line coupler with two‐step stubs considering a spurious notch

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