Design of 3-dB Hybrid Coupler Based on RGW Technology

Shams, Shoukry I.; Kishk, Ahmed A.

doi:10.1109/tmtt.2017.2690298

Cited by 74 publications

(33 citation statements)

References 24 publications

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“…In other words, using periodic cells, artificial magnetic conductor (AMC) surface can be created, which can create a parallel-plate bandgap [14]. In the past decade, RGW was utilized in many applications to design microwave components and devices [15]- [17].…”

Section: Introductionmentioning

confidence: 99%

High Gain Bow-Tie Slot Antenna Array Loaded With Grooves Based on Printed Ridge Gap Waveguide Technology

et al. 2019

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The development of wireless and satellite communication has led to a demand for highperformance microwaves and mm-wave components in terms of cost, losses, and fabrication complexity. Gap waveguide is one of the emerging technologies in 5G and mm-wave applications due to their low cost, low losses, and high power handling capability. In this paper, a groove-based wideband bow-tie slot antenna array is designed at 30 GHz based on printed ridge gap waveguide technology (PRGW). A two-section T-shaped ridge is designed to feed a bow tie slot placed on the upper ground of the PRGW. The gain of the proposed slot antenna is enhanced by using a horn-like groove. Then, the proposed high gain element is deployed to build up a 1 bow-tie slot antenna array loaded with three-layer groove antenna. The proposed antenna array is fabricated and measured, where the measured results show a −10-dB impedance bandwidth from 29.5 to 37 GHz (22%). The fabricated prototype achieves a high gain of 15.5 dBi and a radiation efficiency higher than 80% over the operating frequency bandwidth. INDEX TERMS Millimeter wave technology, periodic structure, wideband, high gain, antenna arrays.

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Section: Introductionmentioning

confidence: 99%

High Gain Bow-Tie Slot Antenna Array Loaded With Grooves Based on Printed Ridge Gap Waveguide Technology

et al. 2019

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“…In addition, they are not preferred for mm wave applications due to difficulties in ensuring good electrical contacts. Other coupler structures based on RGW technology have been introduced in [15,16] to overcome the challenges associated with traditional waveguide technology. Although these couplers designs have an average large size of 1.6λ o × 1.6λ o , they are supporting a quasi-TEM mode which considered an essential feature in many communication systems.…”

Section: Prgw Hybrid Coupler Performance Evaluationmentioning

confidence: 99%

“…In addition, there is a low loss at mm wave frequencies as the wave totally propagates inside the air gap [13]. As the RGW technology is still in its early advancement, only a few investigations are reported in the literature about RGW directional couplers, filter, and antennas [14][15][16][17][18][19][20]. Regarding the PRGW couplers, few trials were performed before [21,22].…”

Section: Introductionmentioning

confidence: 99%

Ultra‐wideband printed ridge gap waveguide hybrid directional coupler for millimetre wave applications

Ali¹,

Shams²,

Sebak³

2019

IET Microwaves, Antennas & Propagation

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The evolution of a wireless communication system to the fifth generation is accompanied by a huge improvement in the performance of the communication system through providing high data rate with a better coverage area. Hence, 5G technology requires access to millimetre wavebands where more spectra are available for high‐speed applications. This technological progress motivates the research community to develop the essential microwave components, specially couplers, through the use of state of the art guiding structure such as printed ridge gap waveguide (PRGW). In this study, the design of ultra‐wideband 3‐dB planar quadrature hybrid coupler based on PRGW technology is proposed. A systematic design procedure for the proposed coupler is presented and illustrated. The proposed directional coupler is fabricated and measured, where the measured results show good agreement. The presented coupler covers over 26% bandwidth centred at 30 GHz. The presented coupler has a measured wide impedance bandwidth of a 26.5% centred at 30 GHz based on −10 dB threshold. The phase difference between output ports is 90°±°5 over 23% relative bandwidth. On the other hand, the total bandwidth is limited by the amplitude imbalance, which has a bandwidth of 13% for ± 0.75 dB variation.

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“…In addition, GW guiding structures benefit from relatively low loss, broad frequency bandwidth, manufacturing flexibility, cost effectiveness and high power handling at millimeter-wave frequencies. As a result, during the past few years, this technology has been successfully applied to design and fabrication of various antenna arrays and millimeter-wave passive and active components [12]- [15].…”

Section: Introductionmentioning

confidence: 99%

A Wideband 3-dB Directional Coupler in GGW for Use in V-Band Communication Systems

2020

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In this article, a broadband 3-dB directional coupler is proposed using groove gap waveguide (GGW) structures. Gap waveguide technology has been introduced to overcome manufacturing and assembling challenges of different millimeter-wave components and devices. The presented coupler has wideband coupling flatness with low return loss in 60-GHz frequency band and can be easily adapted to other frequency ranges. Experimentally, a sample prototype of the proposed 3-dB coupler has been designed and fabricated. The measured return loss and isolation are better than 20 dB and the power-split unbalance within ±0.5 dB is obtained over the frequency range from 57 to 74 GHz (26% BW). The proposed structure has the capability of easily integrating with other millimeter-wave components. INDEX TERMS Gap waveguide technology, directional coupler, branch-guide.

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Design of 3-dB Hybrid Coupler Based on RGW Technology

Cited by 74 publications

References 24 publications

High Gain Bow-Tie Slot Antenna Array Loaded With Grooves Based on Printed Ridge Gap Waveguide Technology

High Gain Bow-Tie Slot Antenna Array Loaded With Grooves Based on Printed Ridge Gap Waveguide Technology

Ultra‐wideband printed ridge gap waveguide hybrid directional coupler for millimetre wave applications

A Wideband 3-dB Directional Coupler in GGW for Use in V-Band Communication Systems

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