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Single Layer Extensible Microstrip Array Antenna Integrating SPDT Switch Circuit for Linear Polarization Switching

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3 Author(s)
Ushijima, Y. ; Electric and Electronic Engineering, Saga University, Saga-shi, Japan ; Nishiyama, E. ; Aikawa, M.

A single layer extensible microstrip array antenna integrating a Single Pole Double Throw (SPDT) switch circuit for linear polarization switching is proposed, and the characteristics of the array antenna are investigated. The proposed array antenna consists of a dual-polarized microstrip array antenna and a novel SPDT switch. The SPDT switch has four diodes, a ring-slot and microstrip lines actively using both-sided MIC technology. By using the SPDT switch, the array antenna can switch the {\pm 45}mathchar linear polarizations accurately. It has a design flexibility to extend to antenna arrays such as 4 ,\times, 4 and 8 ,\times, 8 arrays and so on. It is verified experimentally that the array antenna has an excellent basic performance of linear polarization switching. The array antenna is very promising in a wide variety of wireless application areas, such as radar systems and various kinds of RF sensors. Therefore, it will be pragmatically attractive for various kinds of wireless applications.

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Antennas and Propagation, IEEE Transactions on  (Volume:60 ,  Issue: 11 )