3 dB 90&lt;formula formulatype="inline"&gt;&lt;tex Notation="TeX"&gt;$^{\circ}$&lt;/tex&gt; &lt;/formula&gt; Hybrid Quasi-Optical Coupler With Air Field Slab in SIW Technology

Djerafi, Tarek; Wu, Ke; Tatu, Serioja Ovidiu

doi:10.1109/lmwc.2013.2295297

Cited by 23 publications

(2 citation statements)

References 5 publications

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“…A full suite of microwave devices have been developed with SIC, e.g., filters Pourghorban ; Le Coq et al [2015], couplers Djerafi et al [2014]; Chen et al [2006], phase shifters Djerafi et al [2015], antennas Tekkouk et al [2016]; Tan et al [2015], and tunable devices Entesari et al [2015]. All these devices prove the interesting characteristics of SIC for being used in the microwave industry.…”

Section: 1002/2016rs006181mentioning

confidence: 99%

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

et al. 2017

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Substrate integrated circuits (SIC) have attracted much attention in the last years because of their great potential of low cost, easy manufacturing, integration in a circuit board, and higher‐quality factor than planar circuits. A first suite of SIC where the waves propagate through dielectric have been first developed, based on the well‐known substrate integrated waveguide (SIW) and related technological implementations. One step further has been made with a new suite of empty substrate integrated waveguides, where the waves propagate through air, thus reducing the associated losses. This is the case of the empty substrate integrated waveguide (ESIW) or the air‐filled substrate integrated waveguide (air‐filled SIW). However, all these SIC are H plane structures, so classical H plane solutions in rectangular waveguides have already been mapped to most of these new SIC. In this paper a novel E plane empty substrate integrated waveguide (ESIW‐E) is presented. This structure allows to easily map classical E plane solutions in rectangular waveguide to this new substrate integrated solution. It is similar to the ESIW, although more layers are needed to build the structure. A wideband transition (covering the frequency range between 33 GHz and 50 GHz) from microstrip to ESIW‐E is designed and manufactured. Measurements are successfully compared with simulation, proving the validity of this new SIC. A broadband high‐frequency phase shifter (for operation from 35 GHz to 47 GHz) is successfully implemented in ESIW‐E, thus proving the good performance of this new SIC in a practical application.

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Section: 1002/2016rs006181mentioning

confidence: 99%

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

et al. 2017

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“…To reduce signal interference and noise, the couplers are designed with balanced devices [4][5][6][7]. In addition, multilayer structures [8], substrate integrated waveguides (SIWs) with slot lines [9][10][11][12] have also been applied to design couplers wih specfic requirement. However, due to the high loss and low power handling capabilities, they are not suitable for high power applications [13].…”

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confidence: 99%

A compact directional coupler with high directivity using ferrite cores

Liu

2023

Electronics Letters

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In this paper, a wideband directional coupler is proposed for high‐power applications, which is composed of a transformer and lumped elements. The introduction of the transformer greatly improves the directivity of the coupler. The measurement results demonstrate that the proposed design has an excellent return loss (>17 dB), small insertion loss (<0.4 dB), and high directivity (>22) over a wide frequency band (10–350 MHz). Meanwhile, it can achieve a flat coupling level of 32 dB with the imbalance less than 0.5 dB.

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A review of hybrid couplers: State‐of‐the‐art, applications, design issues and challenges

Abdulbari

Rahim

Soh

et al. 2021

Int J Numerical Modelling

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In recent years, the hybrid branch‐line coupler has attracted much attention due to its appealing features such as of low cost and ease in fabrication for wireless communications. The fifth‐generation cellular networks promise to support several wireless technologies by capitalizing a multitude of frequencies and increase data rates. To achieve that, the butler matrix technique can be used to enhance both bandwidth and data rate with the implementation of beamforming. Conventional hybrid couplers are the main component to build a butler matrix, but they are generally bulky in size and narrow in bandwidth. Moreover, requirements imposed by newer wireless technologies makes the efforts in improving size compactness and bandwidth even more challenging. On the other hand, several techniques have been proposed in literature to solve both issues. This study focuses on the design challenges and issues of hybrid coupler designs and technologies, besides underlining their promising potential. In this context, several techniques for hybrid coupler to achieve the required bandwidth and size reduction are highlighted, such as the T‐shape, meander line, two sections, three‐section, and parallel couple lines.

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3 dB 90<formula formulatype="inline"><tex Notation="TeX">$^{\circ}$</tex> </formula> Hybrid Quasi-Optical Coupler With Air Field Slab in SIW Technology

Cited by 23 publications

References 5 publications

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

Empty substrate integrated waveguide technology for E plane high‐frequency and high‐performance circuits

A compact directional coupler with high directivity using ferrite cores

A review of hybrid couplers: State‐of‐the‐art, applications, design issues and challenges

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