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A micropump is used for the injection of liquid metal in the microfluidic channels. The injected amount of liquid metal into the microfluidic channels is controlled using programmable pneumatic micropumps. A microstrip to the CPS transition is used for impedance matching and field rotation. Abstract This paper describes a wideband double dipole quasi-Yagi antenna fed by a microstrip-to-slotline transition. By signing up as an individual member, you can access various services such as Easy External Access, Alerts, Monthly Report, and Archive. Liquid metal stretchable unbalanced loop antenna.

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The proposed antenna is capable of tuning the frequency through varying length of the metal-filled channels, while maintaining the high gain for all the frequencies by controlling the length of directors. Return loss Microstrip Feed line Greater Than.

Uwing metal stretchable unbalanced loop antenna. The antenna is matched for all the desired bands broavband requiring any external matching circuitry, which simplifies the antenna design. Double dipoles with different lengths are utilized as primary radiation elements to enhance bandwidth and achieve stable radiation patterns. The structure has been fabricated, where liquid metal inside the microchannels is injected by pneumatic micropumps.

The presented design in Figure 3 shows the developed antenna-coupled microbolometer configuration. PIN diodes were installed in the driven elements and in the directors to tune the frequency and to achieve a high gain for each frequency. In addition, the substrate dielectric properties are not correctly modeled in CST at those higher frequencies.


The prototype exhibits continuous tuning of resonant frequencies from 1. The antenna is built on a silicon dioxide SiO 2 layer above a silicon Si substrate with.

Design of Broadband Quasi-Yagi Antenna Using a Folded Dipole Driver

Please check the detailed of Vol. With the addition of a fourth director, the increase in the antenna gain was not substantial for all the frequency bands. The contents of each work shall not be responsible or guarantee. A frequency reconfigurable printed Yagi-Uda dipole antenna for cognitive radio applications. The gain of the proposed antenna versus the number of directors is plotted for all the frequency bands, as presented in Figure 3 b.

For instance, hydrochloric acid HCl can be used to avoid the oxide from forming. The programmable pneumatic micropumps are used for injecting controlled amount of liquid metal in the microfluidic channels. Change settings quasi-yagu naming of downloaded file. Full-text article downdloads count since Please check the detailed of Son Xuat Ta!

The antenna is fed using a coplanar waveguide CPW feeding structure. The top view and side view of the proposed antenna are shown in Figures 1 a and 1 brespectively.

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Topics Discussed in This Paper. The measured gain of the presented antenna is 8. The following steps were performed for fabricating the printed antenna structures.

The width and thickness of the microbolometer structure will be exactly determined subsequent to a precise characterization of the electrical resistivity of the available material at the time of fabrication. If you belong to a school, a public institution, or a company that subscribes to DBpia, you can view the articles free of charge via Institutional Access.

Antenna Geometry and Design The geometrical configuration and seen structure usinf the proposed Quasi-Yagi loop antenna prototype I are introduced in Figure 1. Bdoadband [ 19 ], a reconfigurable Yagi-Uda monopole antenna was presented.

A microfluidically controlled frequency-reconfigurable quasi-Yagi antenna is designed broadbanx demonstrated in Figure 1. A micropump is used for the injection of liquid metal in the microfluidic channels.

Therefore, the length of the driven-element as well as directors can be controlled by injecting liquid metal in the microfluidic channels. Please contact Customer Center for subscription inquiries. Therefore, continuous tuning with high gain is successfully demonstrated using liquid-metal-filled microfluidic channels.