Journal ArticleDOI
A low insertion loss, multi-band, fixed central capacitor based RF-MEMS switch
Mahesh Angira,Kamaljit Rangra +1 more
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TLDR
In this paper, the authors proposed a new type of capacitive shunt RF-MEMS switch, which consists of a beam in the form of two symmetric cantilevers anchored at the central conductor of CPW, where they generate a fixed capacitance.Abstract:
This paper presents a new type of capacitive shunt RF-MEMS switch. In the proposed design, switch consists of a beam in the form of two symmetric cantilevers anchored at the central conductor of CPW, where they generate a fixed capacitance, whereas the free ends of the cantilevers are hanging over the ground plane of the CPW. The net up-state capacitance thus can be approximately determined from the area of overlap between the ground plane and free ends of cantilevers rather than the central overlap area as in the case of conventional movable bridge based approach. Further, the switch is used to inductively tune the isolation peaks in C and X bands i.e. 44.53 dB at 4.5 GHz and 51.08 dB at 9.8 GHz, when either or both cantilevers are electro-statically actuated to the down-state position. The device with movable bridge has isolation peak only at a single frequency in X band. Device shows an insertion loss less than 0.15 dB, a return loss below 21.38 dB up to 25 GHz as compared to 1.00 dB insertion, 7.67 dB return loss for the equivalent conventional switch with movable bridge. In addition, improvement of around 3.5 times in the bandwidth and 50 % reduction in the pull-in voltage has also been achieved. The designed switch can be useful at device and sub-system level for the future multi-band communication applications.read more
Citations
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Journal ArticleDOI
Design and fabrication of a low insertion loss capacitive RF MEMS switch with novel micro-structures for actuation
TL;DR: In this paper, an electrostatic driven capacitive RF MEMS switch is proposed to achieve low actuation voltage and low up-state capacitance, which can be integrated in RF systems without additional circuits to isolate the DC voltage, so the system is simplified.
Journal ArticleDOI
Comprehensive Study on RF-MEMS Switches Used for 5G Scenario
TL;DR: This paper presents a comprehensive study on radio frequency-microelectromechanical systems (RF-MEMS) switches, which are expected to be extensively integrated into 5G infrastructures and can be beneficial for further RF-Mems switches’ design and improvement.
Journal ArticleDOI
Design and experimental validation of a restoring force enhanced RF MEMS capacitive switch with stiction-recovery electrodes
TL;DR: In this paper, an approach for restoring force enhancement to radio frequency (RF) micro-electro-mechanical systems (MEMS) switch with stiction-recovery actuation mechanism is presented.
Proceedings ArticleDOI
Low actuation voltage RF MEMS Shunt Capacitive Switch based on rotated serpentine spring
TL;DR: A low actuation voltage Capacitive Shunt RF MEMS Switch with two flexures based on rotated serpentine spring concept is reported in this paper. But the switch is designed on a CPW line with an impedance of 50.
Proceedings ArticleDOI
Design of Miniaturized Single Bit MEMS Phase Shifter using MEMS Switches
TL;DR: In this paper, the authors proposed a novel miniaturization single bit MEMS phase offset (shifter) using triangular Micro-electro mechanical system (MEMS) switches.
References
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Book
RF MEMS: Theory, Design, and Technology
TL;DR: In this paper, the basics of RF MEMS and how to design practical devices and circuits are discussed, as well as expert tips for designers and a range of real-world applications.
Journal ArticleDOI
RF-MEMS switches for reconfigurable integrated circuits
TL;DR: In this article, the electrostatic microswitch is used in a number of existing circuits and systems, including radio front-ends, capacitor banks, and time-delay networks, for quasi-optical beam steering and electrically reconfigurable antennas.
Journal ArticleDOI
RF MEMS phase shifters: design and applications
TL;DR: In this paper, the reliability of MEMS phase shifters is worse than of single switches since they employ 8-16 MEMS switches and do not tolerate a failure in any of the switches.
Journal ArticleDOI
MEMS for wireless communications: 'from RF-MEMS components to RF-MEMS-SiP'
TL;DR: In this article, the progress in RF-MEMS from a device and integration perspective is reviewed, and the worldwide state-of-the-art of RFMEMS devices including switches, variable capacitors, resonators and filters are described.
Journal ArticleDOI
A differential 4-bit 6.5-10-GHz RF MEMS tunable filter
TL;DR: In this article, the authors presented a state-of-the-art RF microelectromechanical systems wideband miniature tunable filter designed for 6.5-10 GHz frequency range.
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