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In this paper, coplanar waveguide (CPW) of dimension (0.2/1.6/0.2) mm has been used as the transmission line on which a ten number of Capacitive Shunt RF MEMS Switches are periodically spaced in order to achieve appreciable phase shift. The dimensions of the transmission line may be designed to provide a transmission line of 50Ω characteristic impe...
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In this paper, a 3-bit digital phase shifter based on switched transmission line technique using coplanar waveguide is proposed. The design has the resonant frequency of 10 GHz which can be used in wireless communication applictaions. Recent developments in radio frequency components development has raised as a significant way for constructing low...
Analysis and design of a novel high on/off capacitance ratio and low actuation voltage radio frequency microelectro-mechanical systems (RF MEMS) switch. Circuit topology and electrode topology of RF MEMS switches are analyzed. In order to decrease actuation voltage, the switch, using coplanar waveguide transmission line for signal transmission, are...
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Citations
... RF-MEMS is a small mechanical device or system made by borrowing microelectronic processing technology. Now, RF-MEMS technology has been applied in many fields, especially in the military and civil fields [1][2][3]. But, RF-MEMS research is difficult. RF-MEMS the reliability of the device is related to the development efficiency the development cost of the product itself and its practical use. ...
The elastic coefficient K, a factor affecting the life of capacitive RF-MEMS switch, is selected as the research object. First, we use differential evolution based quantum particle swarm optimization (DE-QPSO) to obtain sparse functions of multiple kernel relevance vector machine (MKRVM), and use the MKRVM algorithm to predict the lifetime of such switches. Then the experimental results show that the method can obtain the health index HI of 3.1043e+06 s, the 3.0657e+06 s. closest to the original data in 0.21 s. At the same time, the conclusion of the longest switching life is obtained when the elastic coefficient is in the range of 4-16 N/m.
... Some PAAs which are integrated with RF MEMS devices have been reported. In the [6,7,8], antenna array monolithic integrated MEMS phase shifters were presented. However, the specific method of the integration was not mentioned, only the simulation results were provided. ...
A two-dimension scanning of phased array antenna has been presented. Aperture coupled microstrip patch antenna (ACMPA) elements are used to form a 2×2 array operating at 20GHz. The array is monolithically fabricated with RF MEMS switches by using surface micromachining and anodic bonding process. The main beam can steer in two dimensions when the phase shifters are on the different state. The measurement results show that the array can complete a beam steering angle of approximate ±30° in both E-plane and H-plane, and the highest gain is 9.5dB.
Distributed Micro Electromechanical systems Transmission Line (DMTL) is used for designing digital phase shifters, by using an array of shunt switches. In the present paper, a new approach for designing DMTL for small phase steps is proposed. In the present work, an additional single switch section is introduced, having half the phase shift as the other switch sections in the DMTL. The addition of the new switch section does not alter the characteristic impedance or total phase shift of the DMTL phase shifter. A high resolution phase shifter is designed using the proposed model and the simulation results are presented. The proposed method can be further extended for achieving smaller phase steps.
