RF MEMS switches integrated with sealed suspended coplanar waveguides for reconfigurable RF circuits

Kuwabara, Kei; Takagahara, Kazuhiko; Morimura, Hiroki; Sato, Yasuhiro

doi:10.1109/transducers.2011.5969680

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…At mm-wave frequencies, CPW deals the prospective of lesser conductor and radiation losses as related to microstrip lines. CPW has important advantage of varying magnitudes of the t-line without effecting the value of characteristic impedance [6,10,28].…”

Section: Design Of Transmission Linesmentioning

confidence: 99%

“…Recently, MEMS on/off switches have shown very good RF characteristics, including smaller size, lower insertion loss in on state, almost zero power consumption, higher isolation in off state, extreme lower intermodulation distortion and weight [4,5,29]. The switch's capability to achieve well upto 50 GHz is a noteworthy leap forward over solid-state and mechanical RF switches [6,30]. The RF MEMS switches are applied on various shapes and geometry of microstrip antennas like planar inverted F-shape (PIFA), E-shape, S-shape, spiral, fractal and many more to achieve different applications.…”

Section: Introductionmentioning

confidence: 99%

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Design, Analysis and Comparison of Various MEMS Switches for Reconfigurable Planar Antenna

Chawla¹,

Khanna²

2014

ACTA POLYTECH HUNG

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This paper presents design and analysis of a novel beam for electrostatically actuated Radio Frequency Micro Electro Mechanical Systems (RF MEMS) shunt switches.In the proposed beam design, geometrical variations in terms of structure shape, material, gap, introduction of holes and changing the length and width of anchor have led to good RF performance. The holes in the beam (maximum up to 60% of total area of upper electrode) not only make the smooth mechanical movement of the beam but also result in low spring constant. The designed RF-MEMS switches are actuated electrostatically, and can be operated at low pull-in voltage, ranging from 0.5 V to 22 V with negligible power consumption. Proposed RF MEMS switches can easily be integrated in mobile RF front end section alongwith microstrip antenna in order to provide reconfigurabilty in frequency. Various shapes of planar antenna are also discussed which are suitable with proposed shunt switches. The effect of microstrip line and coplanar waveguide as transmission line are also studied.

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Section: Design Of Transmission Linesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design, Analysis and Comparison of Various MEMS Switches for Reconfigurable Planar Antenna

Chawla¹,

Khanna²

2014

ACTA POLYTECH HUNG

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“…It is desirable for a single antenna to access the additional several services like DCS, PCS, GSM, EGSM, CDMA, WCDMA, GPS, Wi-Fi, Wi-MAX, UMTS, Bluetooth, 802.11a, and 802.11b bands at anytime and anyplace has led to the current efforts towards integration of different wireless access technologies [11][12][13][14][15]19]. It is advantageous or desirable to design MEMS switch on same substrate so that it eliminates the extra interconnections of wire and DC biasing pads [16][17][18]. Doing so for antenna application yields a fully integrated and reduction in fabricating cost [10].…”

Section: Introductionmentioning

confidence: 99%

A new spiral frequency reconfigurable antenna with RF-MEMS switches for mobile RF front end

Chawla

Khanna

2015

JAE

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The full-wave analyses and design of a multiband reconfigurable antenna (MRA) using radio frequency microelectromechanical system (RF MEMS) switches is presented for 1.0-10.0 GHz band. Integration of spiral antenna and MEMS switches on a conventional FR4 printed circuit board (εr = 4.4 and tan δ = 0.002) is designed. This paper also gives the construction and performance of low loss MEMS resistive switches and further describes the important improvements in the construction of the switches. The RF switches used here exhibit very good RF characteristics with typical values of pull-in voltages lies between 3.5 to 20.25 V. The cantilever beam structure of Design-3 switch offers pull-in voltage as low as 3.5 V at air gap g0 = 0.5 μm. Further, Design-1 switch have insertion losses lower than 0.39 dB in ON position, and isolation of "Design-2" switch as high as 79.83 dB in OFF position. As compared to all presented switches the "Design-3" switch has optimized displacement time response i.e. 2 ms. The effect of optimized "Design-3" switch is than study along with spiral antenna. The overall arm length of spiral is changed by activating and deactivating the three "Design-3" switches and consequently its frequency reconfigured. Finally, optimization procedure using quasi Newton method is introduced for characterizing antenna by changing slot length. The wide bandwidth ranging from 200 MHz to 1.65 GHz at different multiband of proposed MRA indicates device contribution in enhancing the mobile TV and internet application speed.

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RF MEMS switches integrated with sealed suspended coplanar waveguides for reconfigurable RF circuits

Cited by 2 publications

References 7 publications

Design, Analysis and Comparison of Various MEMS Switches for Reconfigurable Planar Antenna

Design, Analysis and Comparison of Various MEMS Switches for Reconfigurable Planar Antenna

A new spiral frequency reconfigurable antenna with RF-MEMS switches for mobile RF front end

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