Micro-coaxial V-/W-band filters and contiguous diplexers

Mruk, Joseph R.; Filipović, Dejan S.

doi:10.1049/iet-map.2011.0590

Cited by 14 publications

(5 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the size of the rectangular waveguide, which has the advantages of low loss and high power capacity, shrinks dramatically at or above the millimetre-wave frequency range or even higher frequencies. Researches have designed various W-band bandpass filters, and a part of them have very complex structures [1][2][3], the other filters require high-precision of process [4][5][6][7][8]. Complex design makes processing more difficult and may incur additional losses [9,10].…”

Section: Introductionmentioning

confidence: 99%

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

Liao

Wan

Yin

et al. 2014

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

This study shows a high performance of W‐band bandpass filter using a simple structure, which has advantages of low cost and simple process. This filter is composed of four rectangular resonant cavities, which are connected together by series. We designed and optimised the sizes of four cavities and the sizes of coupling holes by Ansoft's High Frequency Structure Simulator 13.0 (HFSS 13.0). The simulation result of the filter shows that it has the centre frequency at 92.62 GHz, 4.07% (3.86 GHz) bandwidth, a 0.4 dB insertion loss in the passband and a 1.51 rectangular coefficient. The measured response of the filter agrees with the simulation result, which has the centre frequency at 92.6 GHz, 4.53% (4.20 GHz) bandwidth, and an average insertion loss less than 0.5 dB in the passband. The rectangular coefficient of test result is 1.61. The simulation result also prove that it is easy to obtain a W‐band bandpass filter which has a centre frequency range from 90 to 100 GHz with a bandwidth ranging from 3 to 9 GHz by slightly adjusting key sizes of the structure, such as chamfer radius and thickness of the iris.

show abstract

Section: Introductionmentioning

confidence: 99%

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

Liao

Wan

Yin

et al. 2014

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

show abstract

“…V-band BPFs presented in the literature are primarily based on planar transmission line resonators (coplanar waveguide, microstrip) and show static operational characteristics [3][4][5][6][7][8][9][10]. They are mainly fabricated by complementary metal-oxide-semiconductor (CMOS) processes and feature an in-band insertion loss between 2 and 9 dB for fractional bandwidths (FBWs) between 10 and 30% [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…They are mainly fabricated by complementary metal-oxide-semiconductor (CMOS) processes and feature an in-band insertion loss between 2 and 9 dB for fractional bandwidths (FBWs) between 10 and 30% [3][4][5]. Alternative integration concepts relate to low temperature co-fired ceramic (LTCC) substrates [9], silicon micromachining [10] liquid crystal polymer (LCP) substrates [7] and integrated passives technology (IPD) [8]. To the best of the authors' knowledge the number of existing tuneable V-band BPFs is relatively limited because of technological advances that are required for the co-integration of low loss tuneable elements such as RF-MEMS [1].…”

Section: Introductionmentioning

confidence: 99%

V‐band bandpass filter with continuously variable centre frequency

Psychogiou

Peroulis²,

et al. 2013

IET Microwaves, Antennas & Propagation

View full text Add to dashboard Cite

A second-order bandpass filter (BPF) with continuously variable centre frequency tuning is presented in this article. Evanescent-mode cavity resonators with variable capacitive loadings are used as tuning elements. Tuning is achieved by means of micro-electromechanical-systems (MEMS)-actuated highly conductive rigid fingers that feature an out-of-plane deflection. For an applied DC bias voltage between 0 and 27.3 V the centre frequency of the BPF is tuned from 67.4 to 63.2 GHz (4.2 GHz). For this frequency band, the fractional bandwidth (FBW) varies between 8.3 and 3.4% and the in-band insertion loss between 1.45 and 5 dB.

show abstract

“…Some filters and antennas based on this processing technology have been presented. [17][18][19][20] However, the filters presented in these works need to be implemented with very thick or thin coaxial lines, 17,18 and this can be a problem for this process and may increase more tasks both in the design and for the fabrication.…”

mentioning

confidence: 99%

A W‐band air‐filled coaxial bandpass filter employing micro metal additive manufacturing technology

Shi

et al. 2021

Int J RF Microw Comput Aided Eng

View full text Add to dashboard Cite

This article presents a W-band air-filled coaxial bandpass filter with multiple transmission zeros using micro metal additive manufacturing technology. The coaxial structure was fabricated through the electroforming of thick copper layer by layer and inner conductor of coax is supported by SU-8 photo-resist. The internal cross-section size of the coaxial lines is 0.3 mm Â 0.3 mm, which is very compact. The filter is composed of five paralleled dual-behavior resonators (DBRs), four transformers and a pair of coax-to-CPW (Co-plane waveguide) transitions to facilitate the measurement. The relative bandwidth in a wide range can be realized by manipulating the location of the connection points among the resonators and the transformers instead of changing the characteristic impedance of the transformers. Hence, the extreme width of coaxial line and dimensional discontinuities can be avoided to facilitate the fabrication. To validate the filtering design and the manufacturing technology, a fifth order bandpass filter prototype with center frequency 96 GHz, bandwidth of 8 GHz was designed and fabricated. The complete fabrication process was also given in detail. The measured results are in good agreement with simulation: overall insertion loss (IL) of 2.05 dB, 7.95 GHz bandwidth and return loss better than 15 dB in passband. In addition, the influence of processing technology on IL is also discussed, showing that this technology can achieve excellent surface finish and the impact of non-zero surface roughness filtering IL is insignificant. K E Y W O R D Sair-filled coaxial TL, bandpass filter, micro metal additive manufacturing | INTRODUCTIONMillimeter wave (MMW) devices are now widely used in communication and radar systems. Lightweight, a high level of integration and miniaturization are some of the main requirements of the MMW devices. Traditional MMW devices are usually implemented based on CNC milled waveguides, however, the package used in practice is large. 1 Therefore, the bulky dimensions and weight impede the integration and miniaturization of the whole system. Also, when the frequency increases, the fabrication cost also increases a lot. In recent years, some other Zixian Wu and Guanghua Shi are Co-first authors.

show abstract

Micro-coaxial V-/W-band filters and contiguous diplexers

Cited by 14 publications

References 9 publications

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

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

V‐band bandpass filter with continuously variable centre frequency

A W‐band air‐filled coaxial bandpass filter employing micro metal additive manufacturing technology

Contact Info

Product

Resources

About