A New Multi-Functional Half Mode Substrate Integrated Waveguide Six-Port Microwave Component

Karamzadeh, Saeid; Rafiei, Vahid; Saygın, Hasan

doi:10.2528/pierl17030602

Cited by 3 publications

(3 citation statements)

References 6 publications

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“…As the coupling region is increased, higher-order TE m0 modes are excited causing degradation of isolation and reflection coefficient between the outer channels. To the author’s knowledge, non-adjacent port isolation (S43) has not been presented in SIW six-port literature (Salehi et al , 2013; Venanzoni et al , 2015; Karamzadeh et al , 2017); however, researchers presented adjacent port isolation (S23 and S24). To restrict this, matching posts are introduced at the input side in the coupling region based on electric field distribution.…”

Section: Proposed Design and Simulation Of Three-way Power Dividermentioning

confidence: 99%

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A compact, broadband three-way substrate integrated waveguide power divider with improved isolation

Kumar

Mallick²,

Biswas

et al. 2021

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Purpose This paper aims to present a compact, broadband substrate integrated waveguide (SIW) three-way power divider with improved isolation based on six-port SIW coupler. Design/methodology/approach The power coupling among the three output ports occurs due to short openings in the narrow walls of the central SIW channel. Performance improvement in the isolation and return loss among ports is achieved using matching posts placed at the input and output ends of the coupling region. This enhances the coupling between TE10 and TE30 modes. The input matching ports enhance the return loss, whereas the isolation is alleviated by both the input and output matching posts. The bandwidth enhancement is achieved by optimizing the outer SIW channel widths. Findings The measured fractional bandwidth of 27.3% with over 15 dB of isolation and return loss is achieved. The coupling length is 1.55 λg at the centre frequency. The power divider achieves better than 15 dB isolation between non-adjacent output ports. The measured reflection and isolation coefficients are in close agreement with simulated results over 8.2 to 10.8 GHz. Practical implications Isolation between the adjacent and non-adjacent ports is an important parameter as the reflections from these ports will interfere with signals from other ports reducing the fractional bandwidth of the power divider and affecting the overall performance of the transmitters and receivers. Originality/value The authors present the enhancement of isolation between the output non-adjacent ports by optimizing the SIW channel width and matching post in the coupling region to reduce the reflected signals from non-adjacent ports entering into other ports. To the author’s knowledge, this is the only SIW three-way power divider paper showing non-adjacent port isolation among six-port couplers based three-way power dividers.

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Section: Proposed Design and Simulation Of Three-way Power Dividermentioning

confidence: 99%

“…Venanzoni et al (2015) proposed a compact substrate integrated waveguide-based six-port coupler at X-band. Karamzadeh et al (2017) proposed a multi-functional half mode SIW six-port power divider using the slot in the coupling region. Due to the slot in the SIW, it suffers from radiation losses.…”

Section: Introductionmentioning

confidence: 99%

A compact, broadband three-way substrate integrated waveguide power divider with improved isolation

Kumar

Mallick²,

Biswas

et al. 2021

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“…Compared to the traditional coaxial cavities or microstrip technique, SIW is known to take advantages of both waveguide and microstrip structures, such as low loss, high power capacity, low cost and easy to integrate in the planar circuit [6][7][8]. At high operating frequency as Ku-band, the use of SIW is a better choice to design a six-port structure compared to the microstrip technique because the loss contributed by the conductor is low in SIW since the signal is travelling inside the substrate [9]. Unlike in microstrip structure, some of the electric fields is propagating in the air; increasing the losses as the frequency increasing.…”

Section: Introductionmentioning

confidence: 99%

A Ku-Band SIW six-port

Siang

Ibrahim

Karim

et al. 2020

IJEECS

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<p>This paper shows a compact fully integrated six-port Substrate Integrated Waveguide (SIW) operating at Ku-Band frequency range. The SIW six-port is formed by combining two SIW power dividers and two SIW couplers, having the benefit of no additional termination is required as this topology has no excessive port. To achieve the optimized design of the six-port, both of the key components; power divider and coupler are primarily designed, fabricated, and measured individually. Y-junction topology is employed on the power divider structure to achieve a compact size. In turn, the coupling coefficient of the two output ports of the SIW coupler are improved by shifting the position of a row of several vias located at the side wall center closer to the side wall. The simulated six port performance provides an advantage of wide bandwidth within Ku-Band across 13 to 17 GHz with a return loss better than 12 dB and transmission coefficient of 7±1.5 dB. The simulated and measured results show good agreement thus validating the prototype. The SIW six-port can find its application in designing a six-port.</p>

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