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The use of organic semiconductor thin film of Alq3 to design parasitic capacitance coupling parasitic for a referenced circularly polarized microstrip patch antenna is demonstrated in this report. Results of the measurements lead to the conclusion that the Alq3 thin film capacitive coupling parasitic influences the circularly polarization significantly with little shift of operation frequency.
In this paper a single feed circularly polarized patch antenna and a constructed prototype ideal for Gen2 RFID (Generation 2 of Radio frequency identification) reader applications is present. The proposed patch antenna has a simple structure, it have corner truncated square patch, ground plane and a feed line with L-shaped of ground coupled. Through a via hole in the vertical ground of the ground...
The ZnBIP thin film can be considered as a parasitic equivalent LC circuit being electromagnetically coupled to square ring corner truncated copper driven patch. Antenna gain is a variable to describe the parasitic attribute of the patterned ZnBIP. When effective conductivity gets higher, the ZnBIP coupled patch acts more like a metal; thus, the effective dielectric coefficient of the thin film gets...
The implementation of UHF RFID antenna and a testing system is demonstrated in this paper. Four different tags placed in the vicinity of the antenna at different distance and direction to detect the characteristics of the antenna. The experimental results indicate the antenna can cover the existing NCC 922-928MHz band. In addition, the system can be further explored for the application of a location...
Flex-circuits are a reliable alternative to conventional electronic products. It can offer the same advantages of a printed circuit board: repeatability, reliability, and high density. The design of a planar antenna on a flexible substrate can effectively supersede that of an antenna on a FR-4 substrate for more flexible applications on wireless system integration, such as RFID or Bluetooth link as...
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