Lightweight and Low-Loss 3-D Printed Millimeter-Wave Bandpass Filter Based on Gap-Waveguide

Al-Juboori, B, Zhou, J ORCID: 0000-0002-3940-3320, Huang, Y ORCID: 0000-0001-7774-1024, Hussein, M, Alieldin, A, Otter, WJ, Klugmann, D and Lucyszyn, S
(2018) Lightweight and Low-Loss 3-D Printed Millimeter-Wave Bandpass Filter Based on Gap-Waveguide. IEEE Access, 7. 2624 - 2632.

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This paper presents a comprehensive study of a groove gap waveguide (also known as a waffle-iron) bandpass filter at Ka-band (26.5-40 GHz), fabricated using high resolution polymer jetting (Polyjet) 3-D printing technology. The same filter was previously fabricated using brass CNC milling technology. The metalized Polyjet 3-D printed filter is lower loss, lighter in weight and more cost-effective, when compared to the solid metal case. The filter operates at a center frequency of 35.65 GHz and has a 500 MHz bandwidth (1.4% fractional bandwidth), having a transmission zero below and above the passband. Without any design iterations, the measured S-parameters for the Polyjet 3-D printed filter are presented and compared with simulated results, showing excellent agreement. A comparison is then made between the measured results and that of its brass machined counterpart. The new Polyjet 3-D printed filter is 85% lighter than the conventional machined version. All these features prove the important potential of 3-D printing technology for millimeter-wave applications, which include aerospace.

Item Type: Article
Uncontrolled Keywords: Band-pass filters, Waveguide discontinuities, Microwave filters, electromagnetic waveguides, Pins, Printing, Resonators
Depositing User: Symplectic Admin
Date Deposited: 25 Apr 2019 08:31
Last Modified: 01 May 2021 13:10
DOI: 10.1109/ACCESS.2018.2886210
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