A Bandwidth-Enhanced Cavity-Backed Slot Array Antenna for mmWave Fixed-Beam Applications

Yong, Wai Yan; Haddadi, Abolfazl; Emanuelsson, Thomas; Glazunov, Andrés Alayón

doi:10.1109/lawp.2020.3022988

Cited by 27 publications

(20 citation statements)

References 16 publications

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“…To further evaluate the proposed GW-FSS as a filtering radome, Fig. 1 illustrates the integration of a finite 20 × 20 array of the FSS with the fixed beam wideband array antenna in [20]. The FSS structure is excited by an ideal plane wave in the simulation of the unit cell FSS.…”

Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

“…The FSS structure is excited by an ideal plane wave in the simulation of the unit cell FSS. However, when the FSS is cascading with the array antenna designed in [20], the plane wave created by the array antenna in the nearfield is non-ideal. Therefore, the near-field coupling effect between the array antenna and the FSS radome must be considered.…”

Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

“…Fig. 9: Simulated 11 with different distance between the fixed beam array antenna (AA) designed in [20] and the dual GWcavity FSS radome.…”

Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

“…Furthermore, a dual cavity GW-FSS is designed based on the single GW-cavity FSS with considerations of both manufacturability and filtering performance. After carefully optimising all of the parameters of the proposed GW-FSS, we integrated the FSS with the fixed beam array antenna presented in [20] to further validate the proposed GW-FSS as the filtering radome. We further investigate the impact of the GW-FSS on the performance of the array antenna in both pass and rejection band of the FSS.…”

mentioning

confidence: 99%

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Design and Characterization of the Fully Metallic Gap Waveguide-Based Frequency Selective Radome for Millimeter Wave Fixed Beam Array Antenna

Yong

Hadaddi²,

Glazunov

2023

IEEE Trans. Antennas Propagat.

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This paper presents a bandpass frequency selective surface (FSS) radome based on fully metallic gap waveguide (GW) technology. The element of the proposed FSS radome consists of a conventional cross-dipole slot etched on metallic plates and positioned over a groove GW cavity. A design with a single GW cavity layer was initially produced which was later optimised for performance, to comprise a dual GW cavity layer, while considering both functionality and manufacturability. It is shown that the proposed FSS element offers a stable and wide bandpass (from 26-30 GHz) performance in the broadside direction for both transverse electric (TE) and transverse magnetic (TM) polarizations. For oblique angle of incidence, the suggested FSS element works up to 30 • with a reduction in usable bandpass bandwidth performance to 26-28 GHz for both TE and TM polarizations. A 20 × 20-element GW-FSS array prototype has been fabricated and measured, which was integrated with a fixed beam array antenna to further validate its functionality as a filtering radome. The findings show an excellent agreement between simulations and measurements. Hence, the proposed GW-FSS represents a great opportunity to develop a all-metallic FSS with low insertion loss, sharp-roll-off filtering, wideband performance and inexpensive fabrication cost.

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Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

“…Fig. 9: Simulated 11 with different distance between the fixed beam array antenna (AA) designed in [20] and the dual GWcavity FSS radome.…”

Section: Gw-fss As the Filtering Radome For Array Antennamentioning

confidence: 99%

mentioning

confidence: 99%

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Design and Characterization of the Fully Metallic Gap Waveguide-Based Frequency Selective Radome for Millimeter Wave Fixed Beam Array Antenna

Yong

Hadaddi²,

Glazunov

2023

IEEE Trans. Antennas Propagat.

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“…Such antennas are good candidates for mm-wave bands because of their several important advantages compared with antennas with linear polarization, such as combating multipath interferences or fading, no strict orientation requirement between transmitting and receiving radiators and polarization mismatch reduction. Additionally, dual band (with two non-adjacent working bands) [66,67] and dual linear polarization WSAs [66,68] are interesting candidates for 5G applications, which also call for wideband [69][70][71][72], high-gain [73][74][75] and beam-steerable [76,77] antennas.…”

Section: Waveguide Slot Modelsmentioning

confidence: 99%

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

et al. 2021

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Planar waveguide slot arrays (WSAs) have been used since 1940 and are currently used as performing antennas for high frequencies, especially in applications such as communication and RADAR systems. We present in this work a review of the most typical waveguide slot array configurations proposed in the literature, describing their main limitations and drawbacks along with possible effective countermeasures. Our attention has been focused mainly on the improved available design techniques to obtain high performance WSAs. In particular, the addressed topics have been reported in the following. Partially filled WSAs, or WSAs covered with single or multilayer dielectric slabs, are discussed. The most prominent second-order effects in the planar array feeding network are introduced and accurately modeled. The attention is focused on the T-junction feeding the array, on the effect of interaction between each slot coupler of the feeding network and the radiating slots nearest to this coupler, and on the waveguide bends. All these effects can critically increase the first sidelobes if compared to the ideal case, causing a sensible worsening in the performance of the array.

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Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

Asci

2023

Micro & Optical Tech Letters

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In this study, linearly polarized 2 × 2 subarray and 2 × 8 element cavity‐backed antennas are proposed for 5G millimeter‐wave (mmWave) applications. Initially, the 2 × 2 subarray is designed, manufactured, and tested. According to the measured results, the 2 × 2 subarray has a wide fractional bandwidth (FBW) of 24.7% (|S11| < −10 dB, 22.3‒28.6 GHz) which covers the main spectrum allocations for the 5G cellular network. A broadband 1 × 4 corporate feed network is designed, which is challenging and crucial, to form 2 × 8 antenna array. The experimental results show that the final 2 × 8 antenna array has a wide FBW of 23% (|S11| < −10 dB, 22.3‒28 GHz), with a boresight gain of 20.5 dBi. Throughout the operating band, a stable gain of 19.5 ± 1 dBi is achieved. The 2 × 8 antenna array has good and stable radiation characteristics; SLLs are less than −13 dB and XPol is better than −20 dB for both E‐ and H‐planes across the entire operating frequency. Stubs are added between adjacent subarrays in the E‐plane to suppress mutual coupling and to improve gain of 2 × 8 antenna, which results in broadband impedance characteristics. The size of the 2 × 8 antenna array is 6.3λο × 8.1λο × 1.3λο, where λο is the free space wavelength at 25 GHz. These results show that the proposed antenna has potential for 5G millimeter‐wave applications requiring broadband and high gain.

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A Bandwidth-Enhanced Cavity-Backed Slot Array Antenna for mmWave Fixed-Beam Applications

Cited by 27 publications

References 16 publications

Design and Characterization of the Fully Metallic Gap Waveguide-Based Frequency Selective Radome for Millimeter Wave Fixed Beam Array Antenna

Design and Characterization of the Fully Metallic Gap Waveguide-Based Frequency Selective Radome for Millimeter Wave Fixed Beam Array Antenna

A Review on Improved Design Techniques for High Performance Planar Waveguide Slot Arrays

Broadband, high gain 2 × 2 subarray and 2 × 8 cavity‐backed antenna arrays for 5G mmWave applications

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