Characterization of thin film microstrip lines on polyimide

Ponchak, George E.; Downey, Alan N.

doi:10.1109/96.673705

Cited by 104 publications

(43 citation statements)

References 18 publications

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“…Because the ground plane shields all of the electromagnetic fields from the Si and the polyimide layer is thin, typically less than 20 µm, TFMS solved the problem of high attenuation and smaller sized circuits [2]. Coupling between two parallel TFMS lines embedded in polyimide layers was recently studied and presented [3].…”

Section: Introductionmentioning

confidence: 99%

Coupling Between Finite Ground Coplanar Waveguides Embedded in Polyimide Layers for 3D-MMICs on Si

Ponchak

Papapolymerou

Tentzeris

2001

31st European Microwave Conference, 2001

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Abstract--Three-dimensional circuits built upon multiple layers of polyimide are required for constructing Si/SiGe monolithic microwave/mm-wave integrated circuits on low resistivity Si wafers. However, the closely spaced transmission lines are susceptible to high levels of cross-coupling, which degrades the overall circuit performance. In this paper, theoretical and experimental results on coupling of Finite Ground Coplanar (FGC) waveguides embedded in polyimide layers are presented for the first time. These results show that FGC lines have approximately 8 dB lower coupling than coupled Coplanar Waveguides. Furthermore, it is shown that the forward and backward coupling characteristics for FGC lines do not resemble the coupling characteristics of other transmission lines such as microstrip.

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Section: Introductionmentioning

confidence: 99%

Coupling Between Finite Ground Coplanar Waveguides Embedded in Polyimide Layers for 3D-MMICs on Si

Ponchak

Papapolymerou

Tentzeris

2001

31st European Microwave Conference, 2001

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“…Flexible 기판 위에 제작된 안테나는 내 구성이 뛰어나며, 안테나의 특성을 그대로 나타낼 수 있어 기기의 거치 공간 활용을 위해 필름형 안테 나로 이용되기도 한다 [4], [5] .…”

Section: ⅰ 서 론unclassified

Bending Characteristic of a Flexible Antenna

Kim¹,

Lee²,

Lee³

et al. 2011

The Journal of Korean Institute of Electromagnetic Engineering

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본 논문에서는 Flexible-PCB에 제작된 안테나를 구부렸을 때의 특성 변화를 살펴보았다. Polyimide로 이루어 진 Flexible-PCB는 유전율 3.5, 두께 0.125 mm를 가진다. 제안된 안테나는 Bluetooth 대역을 만족하는 기본적인 장방형 루프 안테나와 입력부에 Inverted-L 형태의 스터브를 추가한 안테나이다. 제안된 두 가지 안테나 모델에 대하여 8가지 조건의 bending 변화를 통해 bending 정도에 따른 입력 정합 특성과 방사 형태를 비교하였다. AbstractIn this paper, we studied characteristics of the bent antenna febricated on Flexible-PCB. Flexible-PCB consisting of a polyimide has dielectric constant 3.5, thickness 0.125 mm. Proposed antennas which operates at Bluetooth band are a rectangular loop antenna and a loop antenna with inverted-L type stub. We compared the input matching and radiation characteristics of the proposed antennas under eight kinds of bending conditions.

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“…However, the geometric structure of these conventional transmission lines has dielectric loss and dispersion characteristics due to the semiconductor substrate, which degrades the circuit performance in the high-frequency range. Recently, micro-electro-mechanical (MEMS)-based low-loss transmission lines have been reported with various structures [1][2][3][4][5][6]. The improvement in their performance has been drastic.…”

Section: Introductionmentioning

confidence: 99%

Reduced Hybrid Ring Coupler Using Surface Micromachining Technology for 94-GHz MMIC Applications

Uhm¹,

Tae-Jong²,

Ryu³

et al. 2016

Journal of information and communication convergence engineerin

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In this study, we developed a reduced 94 GHz hybrid ring coupler on a GaAs substrate in order to demonstrate the possibility of the integration of various passive components and MMICs in the millimeter-wave range. To reduce the size of the hybrid ring coupler, we used multiple open stubs on the inside of the ring structure. The chip size of the reduced hybrid ring coupler with multiple open stubs was decreased by 62% compared with the area of the hybrid ring coupler without open stubs. Performance in terms of the loss, isolation, and phase difference characteristics exhibited no significant change after the use of the multiple open stubs on the inside of the ring structure. The reduced hybrid ring coupler showed excellent coupling loss of 3.87±0.33 dB and transmission loss of 3.77±0.72 dB in the measured frequency range of 90-100 GHz. The isolation and reflection were −48 dB and −32 dB at 94 GHz, respectively. The phase differences between two output ports were 180°±1° at 94 GHz.

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Characterization of thin film microstrip lines on polyimide

Cited by 104 publications

References 18 publications

Coupling Between Finite Ground Coplanar Waveguides Embedded in Polyimide Layers for 3D-MMICs on Si

Coupling Between Finite Ground Coplanar Waveguides Embedded in Polyimide Layers for 3D-MMICs on Si

Bending Characteristic of a Flexible Antenna

Reduced Hybrid Ring Coupler Using Surface Micromachining Technology for 94-GHz MMIC Applications

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