A Compact 3 dB ${\rm E}$-Plane Waveguide Directional Coupler With Full Bandwidth

Zhang, Yunbo; Wang, Hongtao; Xin, Huan

doi:10.1109/lmwc.2013.2296297

Cited by 21 publications

(10 citation statements)

References 10 publications

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“…For example, the Riblet short-slot hybrid junction is known to produce a very compact device [34], [35] and it was indeed used by the authors in a previous work [32]. Other alternatives can provide better performance (in terms of bandwidth) [36], as is the case of the coupler used in the present work. A representation of the designed WRPS can be found in Fig.…”

Section: Single-block Module For the Reconfigurable Phase Shiftersmentioning

confidence: 88%

Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws

et al. 2020

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This work presents the design and prototyping of a reconfigurable phased array in Ku band (16 to 18 GHz) implemented in waveguide technology. The design is based on the use of a novel seamless waveguide module integrating four reconfigurable phase shifters to adjust the relative phase shift between the unitary elements of a linear array, which are illuminated uniformly by a corporate waveguide feeding network. The phase shifters are implemented by a 90 ○ hybrid coupler in waveguide technology where two of its ports are loaded with a tunable reactive load, implemented in this proof of concept with a tuning screw. The four phase shifters have been manufactured in a single part using direct metal laser sintering, avoiding the losses related to bad electric contacts and misalignments associated to multipart devices. This also simplifies the assembly of the full phased array, leading to a modular approach with three parts whose design can be addressed separately. The experimental results for the complete array antenna show great performance and demonstrate that the main-lobe of the radiation pattern can be effectively scanned continuously between the angles −25 ○ and 25 ○ , with a high efficiency in the whole design band thanks to the proposed waveguide implementation.

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Section: Single-block Module For the Reconfigurable Phase Shiftersmentioning

confidence: 88%

Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws

et al. 2020

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“…Some new structures using substrate-integrated waveguide (SIW) are designed in [ 13 , 14 , 15 , 16 , 17 ]. Large apertures with transition structures [ 18 ] are presented to reduce the coupler size. They usually take several operating wavelengths to widen the bandwidth.…”

Section: Introductionmentioning

confidence: 99%

“…Thus, this design can further decrease the size of the coupler. This structure can make the coupler size smaller than the coupler presented in [ 18 ]. The length of the coupling region (shown in Figure 1 c) is only 15.82 mm, which is only 1.35 × λg (λg is operation wavelength of center frequency).…”

Section: Introductionmentioning

confidence: 99%

Compact Full Ka-Band Waveguide Directional Coupler Based on Rectangular Aperture Array with Stairs

2021

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This article presents a compact 3 dB waveguide directional coupler with full waveguide bandwidth. It consists of a pair of rectangular waveguides with stairs structures in the coupling region. The waveguides are placed parallel to each other along their broad wall, which has a rectangular aperture array. The compact size, broad bandwidth, good in-band coupling flatness, and good return loss are achieved by using the proposed structure. For verification purposes, a prototype of the proposed coupler was designed, manufactured, and measured. The experimental results show that over the full waveguide bandwidth a return loss of input port better than 17.46 dB, coupling strength varying between −2.74 dB and −3.80 dB, power-split unbalance within 0.76 dB, and an isolation better than 20.82 dB were obtained. The length of the coupling region was only 15.82 mm.

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“…At the design frequency band, couplings to the waveguide cancel in one direction while add in the other direction. Examples are single, multi and continuous aperture coupling [4], [5]. In the branch-guide directional couplers, the coupling region consists of a number of series branch lines connecting the two waveguides [6].…”

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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A Compact 3 dB ${\rm E}$-Plane Waveguide Directional Coupler With Full Bandwidth

Cited by 21 publications

References 10 publications

Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws

Mechanically Reconfigurable Linear Phased Array Antenna Based on Single-Block Waveguide Reflective Phase Shifters With Tuning Screws

Compact Full Ka-Band Waveguide Directional Coupler Based on Rectangular Aperture Array with Stairs

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

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