MEMS-Based Tunable Bandstop Filter Using Electromagnetic Bandgap (EBG) Structures

Karim, Muhammad Faeyz; Liu, A.Q.; Yu, Aibing; Alphones, Arokiaswami

doi:10.1109/apmc.2005.1606719

Cited by 19 publications

(9 citation statements)

References 12 publications

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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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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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“…In particular, in [2,3] for example, de Lustrac et al used PIN diodes to control a conductance lattice. Karim et al proposed in [4] a tunable bandstop filter by adding MEMS to an EBG material. Also, in [5], Poilasne et al joined field effect transistors with a metallic EBG material to control the shape of the beam radiated by an antenna.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Electromagnetic Bandgap Structure Using Plasma

Kallel¹,

Sokoloff²,

Callegari³

et al. 2014

PIER C

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A tunable electromagnetic-bangap (EBG) structure based on a double layer slotline using plasma is proposed. The plasma permittivity can be tuned by the electron density. The idea of integrating periodical plasma elements inside the slot to tune the stopband is investigated. An electron density and an electron collision frequency equal to 1.75 10 13 cm −3 and 10 10 s −1 respectively, are the plasma parameters selected in this study. The simulations reveal a shift rate of the second stopband equal to 6%. A new configuration of the structure is also proposed to adapt it better to the experimental requirements. Based on the simulation results, adding the plasma elements to the modified configuration shifts the stopband 4% and reduces its bandwidth by 43% (at −20 dB).

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“…The microstrip bandstop filter discussed in [3] uses a tuning plate with a trilayer thermal actuator to achieve re-configurability; the filter has frequency operation range from 6.09 to 5.75 GHz, without filter bandwidth control. In [4] a tunable bandstop filter was designed using electromagnetic band gap structures on CPW transmission lines, MEMS bridges were used as tuning elements, a variable central frequency from 17 to 22.5 GHz was obtained, the bandwidth progressively changes with filter center frequency. The bandstop filter in [5] uses RF MEMS switches, the filter is based on microstrip transmission lines with radial stubs, presenting a tuning rage form 8 to 15 GHz, however the bandwidth has arbitrary values at each center frequency.…”

Section: Introductionmentioning

confidence: 99%

Microstrip Switchable Bandstop Filter using PIN Diodes with Precise Frequency and Bandwidth Control

Brito‐Brito

Llamas-Garro

Pradell

et al. 2008

2008 38th European Microwave Conference

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In this paper a switchable bandstop filter able to switch between two different central frequency states while precisely maintaining a fixed bandwidth is presented. The filter topology allows precise control over the design parameters frequency and bandwidth, achieved by choosing adequate resonator sections which are switched by PIN diodes to obtain two discreet states. The central frequency control was obtained by modifying resonator length. Bandwidth control was achieved by choosing a resonator width and controlling the normalized reactance slope parameter of a decoupling resonator by means of a switchable resonator extension. The filter was designed to have center frequencies of 2 and 1.5 GHz both having an 8% fractional bandwidth. The comparison between simulations and measurements showed a central frequency deviation of 4 MHz for the 2 GHz frequency response, and a deviation of 2 MHz for the 1.5 GHz frequency response. The fractional bandwidth deviation for the 2 GHz filter response was 0.67%, while at 1.5 GHz a 0.4% deviation was observed. The simulation and measured responses are in very good agreement.

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MEMS-Based Tunable Bandstop Filter Using Electromagnetic Bandgap (EBG) Structures

Cited by 19 publications

References 12 publications

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

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

A Tunable Electromagnetic Bandgap Structure Using Plasma

Microstrip Switchable Bandstop Filter using PIN Diodes with Precise Frequency and Bandwidth Control

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