Extended Passband Bandstop Filter Cascade With Continuous 0.85–6.6-GHz Coverage

Naglich, Eric J.; Lee, Juseop; Peroulis, Dimitrios; Chappell, William J.

doi:10.1109/tmtt.2011.2175245

Cited by 41 publications

(17 citation statements)

References 19 publications

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“…As the demand on communications systems that use multiple operating frequencies increases, design of frequency-tunable RF/microwave filters and multi-band filters has been of a great interest in the field of microwave engineering [1,2,3,4,5,6,7,8,9,10,11,12,13,14]. Particularly, study on frequency-tunable filters has been mainly motivated by increased necessity of frequency agility in next-generation communications systems and electronic-warfare systems.…”

Section: Introductionmentioning

confidence: 99%

“…Tunable SIW cavity resonator filters have shown large frequency tuning ranges and high-Q performances [7,8,9,10,11,12,13]. Fig.…”

Section: Introductionmentioning

confidence: 99%

“…It is worth noting that solder paste is used between the membrane and the via-holes on the outer boundary for electrical connection between them. On the other hand, the conventional filter structure [7,8,9,10,11,12] has copper-plated via-holes running from the TMM3 substrate to the membrane. This via-hole structure increases fabrication complexity, and the details will be discussed later.…”

Section: Introductionmentioning

confidence: 99%

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Low-cost high-performance frequency-tunable substrate-integrated waveguide filter structure and fabrication method

Nam¹,

Koh²,

Lee³

et al. 2016

IEICE Electron. Express

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This paper presents a new frequency-tunable substrate-integrated waveguide (SIW) filter structure and its fabrication method. The center frequency of the filter is adjusted by moving the membrane structure in each resonator, and the presented fabrication method mainly focuses on how to minimize the number of fabrication steps for constructing the flexible membrane. Due to the simplified process, the filter has advantages of low cost and low risk fabrication. The comparison between a conventional fabrication procedure and the new proposed method is described. For verifying the presented filter structure and fabrication method, two frequency-tunable SIW bandpass filters of the presented structure have been implemented using the presented fabrication method. It is shown that the measured response agrees well with the simulated one. The minimum insertion loss is 0.85 dB, demonstrating that high quality factor can be achieved. Keywords: substrate integrated waveguide (SIW), filter, high Q, copper membrane Classification: Microwave and millimeter-wave devices, circuits, and modules References[1] R. Gomez-Garcia and X. Gong: IEEE Microw. Mag. 15 (2014) 28.

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Section: Introductionmentioning

confidence: 99%

“…Tunable SIW cavity resonator filters have shown large frequency tuning ranges and high-Q performances [7,8,9,10,11,12,13]. Fig.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Low-cost high-performance frequency-tunable substrate-integrated waveguide filter structure and fabrication method

Nam¹,

Koh²,

Lee³

et al. 2016

IEICE Electron. Express

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“…Many examples of tunable bandstop filters have been demonstrated using technologies such as lumped elements [1], varactor-tuned microstrip resonators [2], and evanescent-mode cavities [3]. The majority of these implementations have been demonstrated at frequencies below 18 GHz, with only a few notable examples [4]- [7].…”

Section: Introductionmentioning

confidence: 99%

Design and implementation of an intrinsically-switched 22–43 GHz tunable bandstop filter

Hickle

Sinanis

Peroulis

2016

2016 IEEE 17th Annual Wireless and Microwave Technology Conference (WAMICON)

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A 22-43 GHz tunable bandstop filter is presented, with relevant background theory, design methodology explained. The filter employs silicon-micromachined evanescent-mode cavity resonators, tuned by low-power electrostatic actuators. Low passband of insertion loss of less than 2 dB is obtained, and high stopband attenuation of over 60 dB is achieved by using quasiabsorptive filter design principles. Further reconfigurability is added by utilizing intrinsically-switched coupling elements, which allow the bandstop filter to achieve an all-pass response when the resonators are tuned to a certain frequency.

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“…The resonators are tuned through electromechanical actuation of a small gap between a loading post and a flexible cavity wall, which changes the loading capacitances. Tuning of one filter was done using piezoelectric actuators[5] over a range of 4 GHz to 6 GHz, and the other filter used ME MS tuners [6] to cover 6.3 GHz to 11.4 GHz. The tuning concepts are more fully explained in[5], [6] and will not be repeated here in order to focus on the design of intrinsic switching capability.…”

mentioning

confidence: 99%

High-Q intrinsically-switched quasi-absorptive tunable bandstop filter with electrically-short resonators

Naglich

Guyette

Peroulis

2014

2014 IEEE MTT-S International Microwave Symposium (IMS2014)

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Tunable high-Q intrinsically-switchable quasi absorptive bandstop filters are presented in the 4 GHz to 6 GHz and 6.3 GHz to 11.4 GHz frequency ranges. Their responses can be reconfigured between all pass and tunable bandstop filter responses by simply tuning the center frequency of their resonators, avoiding insertion loss and control voltages associated with the series switches required in conventional bandstop filter banks that have similar response reconfiguration capability. In contrast to previously shown intrinsically-switchable bandstop filters, the filters shown in this paper require only one tuning element per resonator, have a significantly higher quality factor (650), and use electrically-short resonators. When combined with destructive interference attenuation enhancement techniques, these characteristics enable >60 dB maximum attenuation in the bandstop state and less than 2.0 dB insertion loss in the all pass state.

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Extended Passband Bandstop Filter Cascade With Continuous 0.85–6.6-GHz Coverage

Cited by 41 publications

References 19 publications

Low-cost high-performance frequency-tunable substrate-integrated waveguide filter structure and fabrication method

Low-cost high-performance frequency-tunable substrate-integrated waveguide filter structure and fabrication method

Design and implementation of an intrinsically-switched 22–43 GHz tunable bandstop filter

High-Q intrinsically-switched quasi-absorptive tunable bandstop filter with electrically-short resonators

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