Wideband and low-loss waveguides of nonuniform cross-section

Hoseini, Mehri; Amirhosseini, Mohammad Khalaj; Sedighy, Seyed Hassan; Samiei, Mohammad Hashem Vadjed

doi:10.1002/mmce.20830

Cited by 2 publications

(2 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%