Optimum design of broadband coupled-line phase shifters incorporating impedance matching of source and load impedances

Oraizi, Homayoon; Shamsafar, Alireza

doi:10.1109/actea.2009.5227903

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…However, the low resistivity Si substrates, which are used commonly for mixed-signal radio frequency integrated circuits (RFICs), cause serious signal loss in transmission lines and other passives at high operating frequencies. Various methods were proposed to realize the high performance passive devices, such as microstrip fabricated by bulk micromachining and packaging [1,2], thinfilm microstrips (TFMS) [3], microcoax fabricated by thickmetal surface micromachining [4], electrochemical fabrication (EFAB) technology [5,6], and polystrata technology [7], floating shielded coplanar waveguide (CPW) [8,9], and high-aspectratio CPW fabricated by bulk micromachining [10]. However,…”

Section: Resultsmentioning

confidence: 99%

“…Transmission lines with adjustable length are desirable for many microwave and RF implementations, such as impedance matching to a load‐sensitive power amplifier or trimming the phase distribution of the feed network to an antenna array . Variable electrical lengths can be achieved through electronic switching , electronic impedance matching , and mechanical trimming .…”

Section: Introductionmentioning

confidence: 99%

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Microfluidic coaxial transmission line and phase shifter

Hayes¹,

Desai²,

Liu³

et al. 2014

Micro & Optical Tech Letters

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This article presents a microfluidic coaxial transmission line assembly that is realized by weaving together stretchable metallic fibers composed of a liquid‐metal core inside an elastomeric shell. These fibers are woven around a core fiber to create a coaxial assembly. The resulting structure exhibits exceptional stretchability compared to conventional coaxial transmission lines. The mechanical properties of the supporting elastomer and the fluidic properties of the conductors ensure that the characteristic impedance of the transmission line is maintained while stretched. As a result, the system is well suited for applications requiring durable transmission lines and tunable phase shifters (or time‐delay lines). A prototype fluidic coaxial structure is characterized that consists of eutectic gallium indium (EGaIn) encased in an elastomeric poly‐styrene‐(ethylene‐co‐butylene)‐styrene (SEBS). © 2014 Wiley Periodicals, Inc. Microwave Opt Technol Lett 56:1459–1462, 2014

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Microfluidic coaxial transmission line and phase shifter

Hayes¹,

Desai²,

Liu³

et al. 2014

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…The frequency response of the phase shift obtained by the MLS design procedure and HFSS are drawn in Fig. 7, for comparison [10,11]. The amplitude of reflection…”

Section: Design Examplementioning

confidence: 99%

Optimum Design of Modified Schiffman Multi-Section Wide Band Differential Phase Shifter With Impedance Matching

Oraizi¹,

Shamsafar

2012

PIER C

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In this paper, a new circuit configuration composed of two main and reference paths is proposed for the modified multisection Schiffman phase shifter, which improves its bandwidth. The method of least squares (MLS) is developed for its design, based on a circuit model including dispersion relations and dissipation effects. The differential phase shift and reflection coefficients from the input ports are obtained by conversions among the impedance, admittance, ABCD and scattering matrices of the circuit model. Then, an error function is constructed, whose minimization is performed by the combination of genetic algorithm and conjugate gradient method, which gives the optimum values of the physical dimensions of the metallic strips. The impedance matching function of the proposed phase shifter circuit makes it a dual action device, leading to some circuit miniaturization. Three phase shifter circuits with single, double and quadruple sections are designed and one prototype model is fabricated and measured. The MLS, full-wave simulation softwares and measurement results agree very well, which validate the proposed circuit configuration and MLS design procedure. The multi-section phase shifters have actually increased the frequency bandwidth.

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Optimum design of broadband coupled-line phase shifters incorporating impedance matching of source and load impedances

Cited by 2 publications

References 4 publications

Microfluidic coaxial transmission line and phase shifter

Microfluidic coaxial transmission line and phase shifter

Optimum Design of Modified Schiffman Multi-Section Wide Band Differential Phase Shifter With Impedance Matching

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