PCB MEMS-Based Tunable Coplanar Patch Antenna

Maddela, M.; Ramadoss, Ramesh; Lempkowski, Robert

doi:10.1109/isie.2007.4375136

Cited by 5 publications

(7 citation statements)

References 19 publications

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“…In the RF (radiofrequency) domain, solid-state devices such as PIN-Diode, FETs, MESFET, and HEMT are widely employed for switching purposes for the provision of high speeds [2][3][4]. However, their operation is based upon dc power, and this makes room for the arousal of intermodulation-spurious modes and a non-linear operation at higher frequency ranges [5].…”

Section: Introductionmentioning

confidence: 99%

RF-MEMS-Based DPDT Switch on Silicon Substrate for Ku-Band Space-Borne Applications

Singh¹,

Malhotra²

2017

Transactions on Electrical and Electronic Materials

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A RF-MEMS (radio-frequency microelectromechanical-system) based DPDT (double pole double throw) switch for the Ku band has been designed and analyzed for this article. The switch topology is based on the FG-CPW (finite ground-coplanar waveguide) configuration of a microstrip-transmission line. An FEM-based multiphysics solver is used for the evaluation of the spring constant, stress distribution, and pull-in voltage regarding the requirements of the switch-beam unit. The electromagnetic performance of the switch is investigated for a 675 μm thick silicon substrate. For the operational frequency of 14.5 GHz, an insertion loss better than -0.3 dB, a return loss better than -40 dB, and input/output-and output-port isolations better than -35 dB are achieved for the switching unit. Author to whom all correspondence should be addressed: E-mail: harsimran315@gmail.com Copyright ©2017 KIEEME. All rights reserved.This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted noncommercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 17Trans. Electr. Electron. Mater. 18(1) 16 (2017): H. Singh et al.operational tuning frequency, the designed switch results in an insertion loss and a return loss of approximately -0.3 dB and -40 dB, respectively, along with input-input-port (port 1 to port 3) and input-output-port (port 1 to port 4) isolations that are more effective than -36 dB.This designed switch can be efficiently used as an absorptive SPDT switch for mobile-vehicle communications in terms of the routing of the signal between the primary and secondary receivers, the down converter, and the beam-forming APAA (activephased array antenna) network [12]. The details of the design methodology and the RF performance, along with an analysis of the mechanical parameters of the unit-switch beam, are explained in the following sections. DESIGN METHODOLOGYA DPDT-switching unit with a resonating frequency of 14.5 GHz is designed, for which highly resistive silicon is used as the substrate (ε r=11.8, 675 μm thick, ε >8 kΩ-Cm), and the effective permittivity is derived as follows:Trans. Electr. Electron. Mater. 17(6) 1 (2016): H. Singh et al. 3 operational tuning frequency, the designed switch results in an insertion loss and a return loss of approximately-0.3 dB and -40 dB, respectively, along with input-input-port (port 1 to port 3) and input-output-port (port 1 to port 4) isolations that are more effective than -36 dB.This designed switch can be efficiently used as an absorptive SPDT switch for mobile-vehicle communications in terms of the routing of the signal between the primary and secondary receivers, the down converter, and the beam-forming APAA (activephased array antenna) network [12]. The details of the design methodology and the RF performance, along with an analysis of the mechanical parameters of the unit-switch beam, are explained in the ...

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Section: Introductionmentioning

confidence: 99%

RF-MEMS-Based DPDT Switch on Silicon Substrate for Ku-Band Space-Borne Applications

Singh¹,

Malhotra²

2017

Transactions on Electrical and Electronic Materials

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“…However, to achieve an adequate tunable bandwidth, a high number of switches or microactuated pixels is often required, increasing the complexity and cost of fabrication and implementation. Varactors provide an alternative and appealing means for tuning [10], [11]. Since the capacitance of the varactor varies with the supplied DC bias voltage, the resonance frequency of the antenna can be tuned continuously.…”

Section: Introductionmentioning

confidence: 99%

A Tunable Dual-Band Miniaturized Monopole Antenna for Compact Wireless Devices

Ouedraogo

Tang

Fuchi

et al. 2014

Antennas Wirel. Propag. Lett.

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A technique for producing miniaturized tunable planar monopole antennas for wireless communication applications is introduced. Miniaturization is achieved by optimizing the geometry of a pixelated metallic patch surrounding the monopole antenna. Tuning of the antenna is implemented by varying the capacitance of a varactor diode loaded between the pixelated metallic patch and the ground plane. The result is an ultracompact, dual band, folded monopole antenna that fits into a hemisphere of radius λ0/20 at 2.1 GHz. Varying the capacitance of the varactor diode enables the two resonance frequencies to be tuned simultaneously, covering multiple frequency bands for different wireless applications. A prototype antenna has been fabricated and measured, confirming the feasibility of the proposed design.

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“…This will eliminate the use of printed circuit boards used to integrate different subsystems [4]; thus, reduce cost. Such integration covers all off-chip passive components such as antennas [5], capacitors [6], inductors [7], and frequency selection and generation blocks [8].…”

Section: Introductionmentioning

confidence: 99%

Design of Spring Coupling for High-$Q$ High-Frequency MEMS Filters for Wireless Applications

Shalaby

Abdelmoneum

Saitou

2009

IEEE Trans. Ind. Electron.

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A second-order microelectromechanical systems (MEMS) filter with high selectivity and sharp rolloff is required in wireless transceivers used in dense wireless sensor networks (WSNs). These sensors are expected to replace existing wired sensors used in industrial-plant management and environmental monitoring. These filters, together with MEMS-based oscillators and mixers, are expected to replace off-chip components and enable the development of a single-chip transceiver. Such a transceiver will leverage the integrated MEMS components' characteristics to operate at lower power and, hence, longer battery life, making autonomous WSNs more feasible in a wider range of applications. As a result, this paper presents the design and optimization of the coupling beam of wineglass-mode micromechanical disk filters using simulated annealing. The filter under consideration consists of two identical wineglass-mode disk resonators, mechanically coupled by a flexural-mode beam. The coupled two-resonator system exhibits two mechanical-resonance modes with closely spaced frequencies that define the filter passband. A constraint is added on the beam length to eliminate the effect of the coupling-beam mass on the filter's resonant frequency. A new process flow is proposed to realize self-aligned overhanging coupling beams designed in this paper. Index Terms-High-frequency microelectromechanical systems (MEMS), micromechanical filters, optimization, simulated annealing, spring coupling. NOMENCLATURE f o Resonance frequency. R Disk radius. ρ Material density. ν Poisson's ratio. E Young's modulus of elasticity. ω 0 = 2πf o Natural angular frequency. U Radial-displacement component. V Tangential-displacement component. m re Resonator effective mass. K re Resonator effective stiffness.

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PCB MEMS-Based Tunable Coplanar Patch Antenna

Cited by 5 publications

References 19 publications

RF-MEMS-Based DPDT Switch on Silicon Substrate for Ku-Band Space-Borne Applications

RF-MEMS-Based DPDT Switch on Silicon Substrate for Ku-Band Space-Borne Applications

A Tunable Dual-Band Miniaturized Monopole Antenna for Compact Wireless Devices

Design of Spring Coupling for High-$Q$ High-Frequency MEMS Filters for Wireless Applications

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