A differential 4-bit 6.5-10-GHz RF MEMS tunable filter

Entesari, Kamran; Rebeiz, Gabriel M.

doi:10.1109/tmtt.2005.843501

Cited by 191 publications

(84 citation statements)

References 16 publications

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“…The smaller value of series capacitance may increase the return loss at higher center frequency. Capacitive tuning with an inductive inverter can be used to reduce the return loss for the entire tuning range [18,19]. Simultaneous tuning of both capacitance and inductance with stub can also be used to reduce return loss and insertion loss for the entire operating range of the filter [20].…”

Section: Measured Results and Resimulation Considering Fabrication Comentioning

confidence: 99%

Tunable Band-Pass Filter Using Rf Mems Capacitance and Transmission Line

Saha

Hanke²,

Sagberg³

et al. 2011

PIER C

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Abstract-In this paper we present the design and fabrication of an RF MEMS tunable band-pass filter. The band-pass filter design uses both distributed transmission lines and RF MEMS capacitances together to replace the lumped elements. The use of RF MEMS variable capacitances gives the flexibility of tuning both the centre frequency and the band-width of the band-pass filter. A prototype of the tunable band-pass filter is realized using parallel plate capacitances. The variable shunt and series capacitances are formed by a combination of parallel plate RF MEMS shunt bridges and series cantilevers. The filter operates at C-X band. The measurement results agree well with the simulation results.

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Section: Measured Results and Resimulation Considering Fabrication Comentioning

confidence: 99%

Tunable Band-Pass Filter Using Rf Mems Capacitance and Transmission Line

Saha

Hanke²,

Sagberg³

et al. 2011

PIER C

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“…Tunable Filter Topology Figure 2 shows the schematic of a two-pole bandpass tunable filter suitable for wideband tuning at RF frequencies [3,9]. The filter is designed as a 3% Chebyshev filter, with a center frequency of 1.95 GHz (Table I).…”

Section: Tunable Filters In Wcdma Transceiversmentioning

confidence: 99%

“…7). In the case of the RF MEMS design, the varactor C R is implemented as a 3-bit switched capacitor, where each RF MEMS switched capacitor is a series combination of the RF MEMS switch and a fixed capacitor [3]. Table IV presents the different capacitance values and center frequencies vs. bit combinations.…”

Section: System-level Responses In Complex Modulation Systemsmentioning

confidence: 99%

“…One of the important applications of RF microelectromechanical system (RF MEMS) devices is in reconfigurable networks such as tunable filters and impedance tuners [1][2][3], and the advantage of RF MEMS devices is their excellent linearity [4]. From a system-level point of view, linearity is a major issue in wireless communications, especially for systems which employ orthogonal types of modulation techniques such as wideband code-division-multiple-access (WCDMA) [5,6].…”

Section: Introductionmentioning

confidence: 99%

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RF MEMS, BST, and GaAs varactor system-level response in complex modulation systems

Entesari

Rebeiz

2007

Int J RF and Microwave Comp Aid Eng

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This article presents the response of RF microelectromechanical systems (RF MEMS), barium strontium titanate (BST), and gallium arsenide (GaAs)-based tunable filters and reconfigurable matching networks to a wideband code-division-multiple-access signal centered at 1.95 GHz. The RF MEMS tunable filter and impedance tuner result in very low intermodulation distortion and spectral regrowth compared to their BST and GaAs counterparts. The linearity of the BST and GaAs tunable networks improves considerably by using a series combination of BST and GaAs varactors, but the RF MEMS-based networks still show the best linearity of all three technologies. Also, it is shown that the reconfigurable networks, tuned with capacitive RF MEMS can handle up to 1 W of RF power with no self-actuation.

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“…Therefore, it is important to design a multi-band BPF with a tunable center frequency and bandwidths. To meet these requirements, various approaches have been applied to design tunable BPFs using different kinds of tuning devices, such as micro-electromechanical system (MEMS) devices [1,2], ferroelectric devices/capacitors [3], PIN diodes [4], and semiconductor varactor diodes [5][6][7][8][9]. These tuning devices allow tunability of the center frequency of filters by changing the effective length of their resonators and the variation of the bandwidth by changing coupling between resonators.…”

Section: ⅰ Introductionmentioning

confidence: 99%

Harmonic Suppressed Dual-Band Bandpass Filter with Independently Tunable Center Frequencies and Bandwidths

Chaudhary¹,

Jeong²,

Lim³

2013

Journal of electromagnetic engineering and science

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This paper presented a novel approach for the design of a tunable dual-band bandpass filter (BPF) with independently tunable passband center frequencies and bandwidths. The newly proposed dual-band filter principally comprised two dual-mode single band filters using common input/output lines. Each single BPF was realized using a varactorloaded transmission line resonator. To suppress the harmonics over a broad bandwidth, a defected ground structure was used at the input/output feeding lines. From the experimental results, it was found that the proposed filter exhibited the first passband center frequency tunable range from 1.48 to 1.8 GHz with a 3-dB fractional bandwidth (FBW) variation from 5.76% to 8.55%, while the second passband center's frequency tunable range was 2.40 to 2.88 GHz with a 3-dB FBW variation from 8.28% to 12.42%. The measured results of the proposed filters showed a rejection level of 19 dB up to more than 10 times the highest center frequency of the first passband.

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A differential 4-bit 6.5-10-GHz RF MEMS tunable filter

Cited by 191 publications

References 16 publications

Tunable Band-Pass Filter Using Rf Mems Capacitance and Transmission Line

Tunable Band-Pass Filter Using Rf Mems Capacitance and Transmission Line

RF MEMS, BST, and GaAs varactor system-level response in complex modulation systems

Harmonic Suppressed Dual-Band Bandpass Filter with Independently Tunable Center Frequencies and Bandwidths

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