A 3-D Printed Ka-band Twisted Waveguide Filter with Filtering and Polarization Rotation

Zhang, Yi; Xu, Jun; Zhang, Fan; He, Xi; Li, Xiaoyan; Sun, Ying; Xu, Shuozhi

doi:10.1109/apusncursinrsm.2019.8888797

Cited by 15 publications

(10 citation statements)

References 9 publications

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“…In this work, a new waveguide step‐twist integrated with a four‐order Chebyshev BPF is proposed. The twist is more compact in comparison with our previous work [4], with the whole length of only ∼2 λ . Compared to the 3D‐printed metal twist with lowpass filter in [3], the proposed twist with incorporated BPF is more sensitive to dimensional errors.…”

Section: Introductionmentioning

confidence: 61%

“…There are very few examples of waveguide twist with filter response, except those reported in [3, 4]. In [3], a waveguide twist integrated with lowpass filter is implemented using 3D metal printing with excellent performance.…”

Section: Introductionmentioning

confidence: 99%

“…In [3], a waveguide twist integrated with lowpass filter is implemented using 3D metal printing with excellent performance. In [4], our previous work presented a Ka‐band twist integrated with bandpass filter (BPF) based on continuously rotated cavities. However, the twist has a length of ∼4 λ ( λ is guided wavelength calculated at centre frequency) to maintain desired insertion loss (IL).…”

Section: Introductionmentioning

confidence: 99%

“…Stereolithography apparatus (SLA) can offer high precision and low surface roughness, and therefore is employed in this work. The SLA 3D printing has been successfully utilised to demonstrate a wide range of microwave devices [4][5][6][7][8][9][10][11]. Additionally, different to [3], the filtering twist reported here have slots on the waveguide walls, yielding a further reduction in device weight and improved metal plating at inner walls.…”

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confidence: 99%

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3D printed waveguide step‐twist with bandpass filtering functionality

Zhang

Gao

et al. 2020

Electron. lett.

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A novel waveguide step-twist integrated with a bandpass filter is presented in this Letter. The twist is composed of four equally rotated cavities to achieve polarisation rotation and filtering functionalities simultaneously. Such step-twist can achieve a significant reduction in size and weight. The design is demonstrated at Ka-band using waveguide technology and is fabricated using a stereolithography apparatus 3D printing together with metal plating. The device is designed to have a centre frequency of 32 GHz and a bandwidth of 1 GHz. The measured result shows good agreement with simulations, with a measured average insertion loss of 0.84 dB and a return loss better than 15 dB across the passband.

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Section: Introductionmentioning

confidence: 61%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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3D printed waveguide step‐twist with bandpass filtering functionality

Zhang

Gao

et al. 2020

Electron. lett.

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“…For example, in [17], two EBM manufactured Ku-band horn antennas exhibited a measured surface roughness of 40 μm RMS, which led to 1 dB of additional loss at 15 GHz. Plastic/ resin-based AM manufacturing processes such as stereolithography apparatus (SLA) [18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] result in significantly lower surface roughness, lower loss and weight. As an example, the SLA-based slot waveguide antenna in [18] exhibited 1 dB higher gain compared to the same antenna when manufactured with the DMLS process.…”

Section: Introductionmentioning

confidence: 99%

Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band

Zhao

Psychogiou

2021

Int. J. Microw. Wireless Technol.

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The manuscript reports on additively-manufactured (AM) coaxial-resonator-based bandpass filters (BPFs) and RF diplexers. A monolithic integration concept using stereolithography apparatus (SLA) is proposed and discussed in detail. Coupled-resonator-based synthesis alongside full-electromagnetic-based design methods is used for the design of the monolithic filters and RF diplexers. In particular, the paper discusses a new external coupling mechanism for dual-band BPFs that allow to independently control the coupling in each of the BPF passbands. Furthermore, a novel coaxial transmission line-type T-junction is proposed for the design of single- and dual-band RF diplexers. For practical validation purposes, multiple BPF and RF diplexer prototypes were designed, manufactured and tested at S- and C-band demonstrating the applicability of the proposed concept to low-cost, low-loss and low-weight RF components with complex geometrical features.

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Novel compact waveguide filtering twist for computer numerical control machining

Zhang

Shang

et al. 2022

Electronics Letters

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In this letter, the authors present a novel compact waveguide filtering twist that can be readily fabricated from metal using the computer numerical control (CNC) machining process. This filtering twist comprises four coupled resonators that are rotationally deformed to provide the desired 90°twist. Such resonator structures eliminate the use of curved features and therefore are ideally suitable for conventional CNC machining. The proposed design offers appealing advantages, including great compactness, easy fabrication, and good scalability to millimetrewave and terahertz frequencies. The design is demonstrated at X-band and has a fourth-order Chebyshev filter response (bandwidth 0.4 GHz, centred at 10 GHz). The good agreement between simulation and measurement results validates the proposed concept.

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A 3-D Printed Ka-band Twisted Waveguide Filter with Filtering and Polarization Rotation

Cited by 15 publications

References 9 publications

3D printed waveguide step‐twist with bandpass filtering functionality

3D printed waveguide step‐twist with bandpass filtering functionality

Monolithically-integrated 3D printed coaxial bandpass filters and RF diplexers: single-band and dual-band

Novel compact waveguide filtering twist for computer numerical control machining

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