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            ‐band low‐loss bandpass filter using rectangular resonant cavities

Liao, Xiaoyi; Wan, Lei; Yin, Yong; Zhang, Yichi

doi:10.1049/iet-map.2014.0252

Cited by 22 publications

(16 citation statements)

References 14 publications

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“…Rectangular waveguides with the advantages of high power handling and easy interconnection are preferred for filtering modules at such high-frequency band. So far, a lot of W-band waveguide filters manufactured by various techniques, such as thick SU-8 photoresist technology [1,2], deep reactive ion etching process [3], milling process [4,5], printed circuit board technology [6], have been reported. Among them, the filters fabricated by milling process have better insertion loss characteristics for they can be connected to the system directly.…”

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confidence: 99%

W ‐band quasi‐elliptical waveguide filter with cross‐coupling and source–load coupling

et al. 2016

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A high-performance waveguide bandpass filter operating at W-band is presented. This folded fourth-order filter with quasi-elliptic response is developed by introducing cross-coupling and source-load coupling, while maintaining a compact construction for simple computer numerical control (CNC) milling process. The filter fabricated within aluminium block shows an insertion loss of about 1.2 dB in a 3 dB fractional bandwidth of 5.5% from 90.1 to 95.2 GHz, which are very close to the simulated results in the full W-band.

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confidence: 99%

W ‐band quasi‐elliptical waveguide filter with cross‐coupling and source–load coupling

et al. 2016

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“…In addition, a majority of the filters are constructed using split block technology, for which the filters are cut along the middle of the broadside wall for minimized loss. Table I indicates that the laser machined filter and 3-D printed filter demonstrate a comparable performance (in terms of low insertion loss and good return loss) to those made by high precision milling [1], [2].…”

Section: Measurement and Discussionmentioning

confidence: 95%

$W$ -Band Waveguide Filters Fabricated by Laser Micromachining and 3-D Printing

Shang

Penchev

Guo

et al. 2016

IEEE Trans. Microwave Theory Techn.

121

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This paper presents two W-band waveguide bandpass filters, one fabricated using laser micromachining and the other 3-D printing. Both filters are based on coupled resonators and are designed to have a Chebyshev response. The first filter is for laser micromachining and it is designed to have a compact structure allowing the whole filter to be made from a single metal workpiece. This eliminates the need to split the filter into several layers and therefore yields an enhanced performance in terms of low insertion loss and good durability. The second filter is produced from polymer resin using a stereolithography 3-D printing technique and the whole filter is plated with copper. To facilitate the plating process, the waveguide filter consists of slots on both the broadside and narrow side walls. Such slots also reduce the weight of the filter while still retaining the filter's performance in terms of insertion loss. Both filters are fabricated and tested and have good agreement between measurements and simulations.

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“…Traditionally, waveguide filters or other microwave components are usually manufactured through a high-precision Computer Numerical Control (CNC) milling process. It is well known that this technology has been advancing for the past few decades, and waveguide components manufactured through the CNC milling process, which exhibits excellent measured results, have also been widely demonstrated in the current literature (e.g., [12][13][14][15]). However, as the RF spectrum continues to increase, the waveguide filters or other microwave components become smaller in feature size.…”

Section: Scope Motivations and Aimsmentioning

confidence: 99%

On the Design and Fabrication of Chained-Function Waveguide Filters With Reduced Fabrication Sensitivity Using CNC and DMLS

Lim¹,

Cheab²,

Soeung³

et al. 2020

PIER B

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In this paper, we present the design and fabrication of a novel class of emerging waveguide filters based on chained-functions at the millimeter-wave band. The derivation of chained-functions by chaining of prescribed generalized Chebyshev seed functions based on the partition theory is presented in details, and the implementation to waveguide technology is proposed and evaluated. The waveguide filter is fabricated through two different technologies, namely the Computer Numerical Control (CNC) milling technology and the Direct Metal Laser Sintering (DMLS) based additive manufacturing technology. The chained-function filters, which lie in between the Butterworth and Chebyshev filters, inherit the salient properties of both Butterworth and Chebyshev filters. Therefore, the chained-function waveguide filter exhibits filtering responses that have a superior rejection property and a lower loss with reduced sensitivity to fabrication tolerance than the standard Chebyshev waveguide filter. The efficiency of the proposed waveguide filter is confirmed both theoretically and empirically, using the CNC and DMLS processes. The issues of a higher manufacturing tolerance and apparent surface roughness associated with the DMLS method are found to be electrically insignificant when the chained-function concept is adopted in waveguide filter design. In general, the measured results of all the realized waveguide filters agree well to those of the simulation models. These results positively demonstrate that the chainedfunction concept has robust properties for rapid, high-performance, low-cost, and sustainable filter design and implementation, particularly for higher millimeter-wave frequency bands and for narrowband applications.

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W ‐band low‐loss bandpass filter using rectangular resonant cavities

Cited by 22 publications

References 14 publications

W ‐band quasi‐elliptical waveguide filter with cross‐coupling and source–load coupling

W ‐band quasi‐elliptical waveguide filter with cross‐coupling and source–load coupling

$W$ -Band Waveguide Filters Fabricated by Laser Micromachining and 3-D Printing

On the Design and Fabrication of Chained-Function Waveguide Filters With Reduced Fabrication Sensitivity Using CNC and DMLS

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