Reconfigurable Siw Antenna Based on Rf-Mems Switches

Abstract

Abstract-In this article, a novel compact reconfigurable antenna based on substrate integrated waveguide (SIW) technology is introduced. The geometry of the proposed antennas is symmetric with respect to the horizontal center line. The electrical shape of the antenna is composed of double H-plane SIW based horn antennas and radio frequency micro electro mechanical system (RF-MEMS) actuators. The RF-MEMS actuators are integrated in the planar structure of the antenna for reconfiguring the radiation pattern by adding nulls to the pattern. The proper activation/deactivation of the switches alters the modes distributed in the structure and changes the radiation pattern. When different combinations of switches are on or off, the radiation patterns have 2, 4, 6, 8, . . . nulls with nearly similar operating frequencies. The attained peak gain of the proposed antenna is higher than 5 dB at any point on the far field radiation pattern except at the null positions. The design procedure and closed form formulation are provided for analytical determination of the antenna parameters. Moreover, the designed antenna with an overall dimensions of only 63.6 × 50 mm 2 is fabricated and excited through standard SMA connector and compared with the simulated results. The measured results show that the antenna can clearly alters its beams using the switching components. The proposed antenna retains advantages of low cost, low cross-polarized radiation, and easy integration of configuration.

A Novel Reconfigurable MMIC Antenna with RF-MEMS Resonator for Radar Application at K and Ka Bands

“…In 1998, E. Brown is the first researcher witch used the RF-MEMS for reconfigurable antenna [7]. Lately, many potential researchers use the RF-MEMS for frequency reconfigurable antenna essentially at very important frequencies.…”

“…In the literature, there are many recent reconfigurable antennas using different technologies; Such In [14], Prafulla et al have developed a reconfigurable Microstrip patch antenna using MEMS switch for Ku-band application, showing a good result in the gain and the frequency range; In [7], Bahram et al have used the SIW antenna technologies with the RF-MEMS switch in order to obtain the reconfigurable antenna by optimising the radiation pattern. In [15], Slot-ring patch antenna loaded with multi MEMS has been proposed and designed giving three different approaches (switchable antenna with RF-MEMS switches, wideband or multiband antenna integration with tunable filters, and array architectures).…”

Development of novel wideband H-plane horn antennas by employing asymmetrical slots based on SIW technology

“…Therefore, one of the promising candidates for solving such problem and developing microwave components in these bands is SIW technology. SIW structures have been widely employed in microwave components, antennas, and circuit designs [1][2][3][4][5][6][7]. Besides, SIW structures can be integrated with feeding network.…”

“…They are also good candidate to feed the surfacewave or leaky-wave antennas [4]. Various planar antennas based on SIW technology have been investigated by numerous researchers since now [3][4][5][6][7][8]. However, design of wideband antennas is the most upcoming challenge at millimeter-wave bands (30-300 GHz).…”

“…Different kinds of SIW H-plane horn antennas have been presented * Corresponding author. in [3][4][5][6][7]; although some of the mentioned antennas have good radiation characteristics, they have limited bandwidth. A wideband H-plane horn antenna based on ridge substrate integrated waveguide (RSIW) has been developed in [8].…”