Design of a Transverse Slot Array in Groove Gap Waveguide using Horns at 28 GHz Band

Hsieh, Chih-Kai; Kehn, Malcolm Ng Mou; Rajo‐Iglesias, Eva

doi:10.1109/apusncursinrsm.2019.8888304

Cited by 7 publications

(7 citation statements)

References 6 publications

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“…This slot flares linearly to a square outermost radiating horn aperture of size 12.2 mm × 12.2 mm. The height of the radiating horn in this case is set to 7.1 mm to keep it low profile following the preliminary design in [13]. For a single such horn, the simulated radiation patterns in both principal planes are given in Figure 4, inset diagrams within which depict the structure.…”

Section: Design Of the Horn Structurementioning

confidence: 99%

“…In some recent studies of waveguide slot arrays made entirely of metal [13,14], a one-dimensional (1D) transverse slot array on the broad-wall of a rectangular gap waveguide for broadside radiation at 28 GHz was reported, and in which grating lobe suppression was achieved by laying a corresponding 1D array of external low profile horns over the slots, constituting an all-metal topology. In other words, the slots are transformed in low profile horns whose radiation patterns act as spatial filters for the grating lobes, attenuating them.…”

Section: Introductionmentioning

confidence: 99%

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Design of a Planar Array of Low Profile Horns at 28 GHz

Wang

Kehn

Rajo‐Iglesias

2020

Sensors

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A planar array of low profile horns fed by a transverse slotted waveguide array in the low millimeter-wave regime (28 GHz) is presented. The array of transverse slots cannot be directly used as antenna as it has grating lobes due to the fact that slot elements must be spaced a guided wavelength. However, these slots can be transformed into low profile horns that with their radiation patterns attenuate the grating lobes. To this aim, low profile horns with less than 0.6λ0 height were designed. The horns include a couple of chips that contribute to further reduce the grating lobes especially in the H-plane. The good performance of the designed array was demonstrated by both simulations and experiments performed on a manufactured prototype. A 5 × 5 array was designed that has a measured realized gain of 26.6 dBi with a bandwidth below 2%, still useful for some applications such as some radar systems. The total electrical size of the array is 6.63λ0× 6.63λ0. The radiation efficiency is very high and the aperture efficiency is above 80%. This all-metal solution is advantageous for millimeter-wave applications where losses sustained by dielectric materials become severe and it can be easily scaled to higher frequencies.

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Section: Design Of the Horn Structurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of a Planar Array of Low Profile Horns at 28 GHz

Wang

Kehn

Rajo‐Iglesias

2020

Sensors

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“…The series fed slot arrays with longitudinal slots have been studied in rectangular waveguides, 2,8 substrate integrated waveguide, 9,10 and gap waveguide 7,11 technologies. Transverse series fed slot antennas 4,[12][13][14] have the problem of grating lobes since the spacing between the adjacent slots is more than the free space wavelength. The grating lobe problem has been removed by different techniques such as using a substrate with high permittivity through the propagating wave path to reduce its wavelength.…”

Section: Introductionmentioning

confidence: 99%

“…Another technique to suppress the grating lobes is making the radiation pattern of each element more directive so its null is placed along the angles at which the grating lobes of the array factor are located. In Hsieh et al, 14 external horns above the radiating slots are applied to provide directive pattern for each transverse slot etched on the broad wall of the waveguide. In Vosoogh et al, 15 the radiating slots are loaded by open ended cylindrical cavities to achieve the same goal.…”

Section: Introductionmentioning

confidence: 99%

Development of a compact transverse slot array antenna using corrugation in groove gap waveguide technology

Ostovarzadeh

Parizi

2022

Int J Communication

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Summary We present the proof of concept of a compact slot array antenna with proper side lobe level in groove gap waveguide (GGW) technology. Four transverse slots are etched at the GGW broad wall along with the nulls of standing TE10 wave existing inside the shorted GGW. To decrease the sidelobes and antenna size, corrugations are applied through the wave path inside the GGW. Proper use of corrugations can reduce the wavelength inside the GGW leading to reduction of the distance between adjacent transverse slots, which can help to suppress the grating lobe problem and consequently enhance the radiation efficiency, which is a challenge in transvers slot array antennas. The designed antenna is optimized to achieve maximum gain, lowest grating lobe level, and return loss at 15 GHz using HFSS simulator. The achieved gain is about 13 dBi, and the SLL is better than 15 dB. To confirm the simulation results, the designed antenna was fabricated and tested. Both simulation and measurement results confirm that the grating lobes are well suppressed at the antenna operating frequency.

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“…Some designs of millimeter wave devices using this periodic structure can be found in the literature [ 14 , 15 ]. The initial work related to the proposed design was presented in [ 16 ]. There is also the potential for extending this idea to planar arrays [ 17 , 18 ] in the future.…”

Section: Introductionmentioning

confidence: 99%

Array of Horns Fed by a Transverse Slotted Groove Gap Waveguide at 28 GHz

Kehn

Hsieh

Rajo‐Iglesias

2020

Sensors

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An array of low profile horns fed by transverse slots on a groove gap waveguide (GGWG) is presented. The GGWG is implemented with glide symmetrical holes and the design frequency is 28 GHz. The low profile horns are integrated in the same waveguide wall as the slots. The designed antenna is a linear array of these horns but the solution can be easily extended to a planar array. Experimental results support this work. The designed antenna is a good candidate for applications related to 5G technologies where medium to high gains as well as high efficiencies are required and reasonable manufacturing costs are demanded.

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Design of a Transverse Slot Array in Groove Gap Waveguide using Horns at 28 GHz Band

Cited by 7 publications

References 6 publications

Design of a Planar Array of Low Profile Horns at 28 GHz

Design of a Planar Array of Low Profile Horns at 28 GHz

Development of a compact transverse slot array antenna using corrugation in groove gap waveguide technology

Array of Horns Fed by a Transverse Slotted Groove Gap Waveguide at 28 GHz

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