Orthogonal linear polarization switchable slot-ring array antenna using RF-MEMS switch

Abstract

An orthogonal linear polarization switchable slot-ring array antenna using an RF-MEMS switch is newly proposed and its characteristics are experimentally investigated. The proposed array antenna consists of a dual-polarized slotring array antenna and an RF-MEMS switch (OMRON, 2SMES-01) which has high isolation and low insertion loss characteristics. This array antenna can accurately switch ±45deg. orthogonal linear polarizations due to the characteristics of the RF-MEMS switch. Two layers of Teflon glass fiber substrate with the relative dielectric constant r of 2.15 and the thickness of 0.8×2 mm is used. In the measurement, ±45-deg. linear polarization switching and excellent cross-polarization suppression are obtained. Thus, the RF-MEMS switch is suitable for polarization switchable array antennas. The array antenna using an RF-MEMS switch is very promising in a wide variety of wireless application areas, such as radar systems and various kinds of RF sensors.

A tri-state SPDT switch using shunt open-end stub resonator for X-band applications

“…In [7], with the aid of the coupled lines, which has control switches at the coupled and the isolation ports, tristate SPDT switch was proposed depending on the states of the switches. A SPDT switch circuit is more useful to design polarization [17,18,19,20,21,22,23] and pattern [24,25,26,27,28,29,30] agile antennas.…”