Modified suspended striplines for microwave integrated circuits

Villotte, J.P.; Aubourg, Michel; Garault, Y.

doi:10.1049/el:19780404

Cited by 14 publications

(6 citation statements)

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“…In the RF communication system equipment, an important issue is insertion losses of passive microwave components. Over the years, the problem of total‐loss reduction has been investigated . Mainly, the proposed solutions involve utilization of suspended stripline technique.…”

Section: Introductionmentioning

confidence: 99%

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Design of low-loss directional couplers with compensated coupled-line sections in suspended microstrip technique

Smolarz

Wincza

Gruszczyński

2017

Int J RF Microw Comput Aided Eng

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Design of coupled line 3dB directional couplers realized in suspended microstrip technique has been presented. The main goal was to minimize the insertion losses of the coupler, what has been achieved by a proper choice of the realization technique. As the chosen coupled line geometry is asymmetric to achieve good electrical performance of the resulting coupler, capacitive compensation technique has been utilized to equalize capacitive and inductive coupling coefficients. Furthermore, a distributed‐element approach has been investigated for realization of compensation capacitances, due to their physical size resulting from the dielectric structure. The proposed coupler has been designed in two versions, having center frequencies equal to 0.89 and 1.1 GHz, manufactured and measured. The measurement results show good agreement with electromagnetic analyses and prove the correctness and usefulness of the presented design method. The manufactured couplers exhibit insertion losses as low as 0.08 dB at the center frequency.

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Section: Introductionmentioning

confidence: 99%

“…Over the years, the problem of total-loss reduction has been investigated. [7][8][9][10][11] Mainly, the proposed solutions involve utilization of suspended stripline technique. In this method, air is used as a main dielectric and the layer stack-up consists of thin dielectric substrate between two ground planes.…”

Section: Introductionmentioning

confidence: 99%

Design of low-loss directional couplers with compensated coupled-line sections in suspended microstrip technique

Smolarz

Wincza

Gruszczyński

2017

Int J RF Microw Comput Aided Eng

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“…Electromagnetic MMs are usually geometrically scalable, which translates into operability over a significant portion of the electromagnetic spectrum. Various MMs structures have been shown to naturally couple to either the electric or magnetic components of light in frequency ranges from radio [4] to near optical [5]. According to effective medium theory, MMs can be characterized by a complex electric permittivity e(x) ¼ e 1 þ ie 2 and magnetic permeability …”

Section: Introductionmentioning

confidence: 99%

“…Coupled-line directional couplers have been the subject of extensive research over past decades [1][2][3][4]. It is well known that to realize an ideal coupled-line coupler the condition of equality of inductive and capacitive coupling coefficients k L ¼ k C must be fulfilled [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…The aforementioned condition is met in a fully homogeneous stripline structure, whereas the introduction of inhomogeneous dielectric media results in inductive and capacitive coupling coefficients' inequality. To overcome this problem in case of inhomogeneous media, modified structures of coupled lines have been proposed [2][3][4]. In [2], various configurations of coupled lines in a multilayer asymmetric structure have been investigated in which the condition k L ¼ k C has been satisfied by the proper choice of properties of dielectric layers and geometry of coupled lines.…”

Section: Introductionmentioning

confidence: 99%

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Suspended stripline coupled lines with grounded strips for equalization of inductive and capacitive coupling coefficients

Gruszczyński

2010

Micro & Optical Tech Letters

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A suspended stripline coupled-line structure has been proposed, which allows for achieving equalization of inductive and capacitive coupling coefficients in a wide range of directional couplers' coupling C. Three different variants of the proposed structure have been considered, and the results of numerical calculations using FD technique have been presented, which show the possibility of equalization of inductive and capacitive coupling coefficients. Moreover, graphs showing structural parameters are presented in a wide range of coupling coefficient k. The results of investigations have been confirmed by the measurements of the designed 15-dB directional coupler.

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References

2000

Foundations of Interconnect and Microstrip Design

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Modified suspended striplines for microwave integrated circuits

Cited by 14 publications

References 1 publication

Design of low-loss directional couplers with compensated coupled-line sections in suspended microstrip technique

Design of low-loss directional couplers with compensated coupled-line sections in suspended microstrip technique

Suspended stripline coupled lines with grounded strips for equalization of inductive and capacitive coupling coefficients

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