A Pattern Reconfigurable Antenna for Wlan and Wimax Systems

Abstract

Abstract-A novel tri-band pattern reconfigurable planar antenna is proposed. Tri-band is achieved by inserting a bandstop filter at the feed line of a wideband monopole antenna with complementary split ring resonator (CSRR) on a circular patch. Two parasitic arc-shaped stubs are in the back side of the radiator that works as a reflector. The antenna radiation pattern is switched from omnidirectional to one of two different directional modes by activating one of the stubs. Three different radiation modes are controlled by four ideal switches. Radiation pattern reconfigurability makes it suitable for the use of flexible cognitive radio front-end system. The proposed antenna is suitable for WLAN 2.4/5.2/5.8 GHz and WiMAX 3.5/5.5 GHz applications. Good agreement between simulated and measured results validates its possible application.

Dynamically Switched Dual-Band Dual-Polarized Dual-Sense Low-Profile Compact Slot Circularly Polarized Antenna Assisted With High Gain Reflector for Sub-6 GHZ and X-Band Applications

“…The present technology can be extended to array antennas using phase shifters, where the relative phases of RF signal carriers can be changed to accomplish beam steerable radiations at different directions. Also the design can be extended to MIMO antennas [37,38,43], since excitation of uni-planar slot structure does not require finite ground plane, and can be oriented in different configurations to provide radiation diversity [42] and isolation improvements.…”

A Parasitic Array Based Pattern Reconfigurable Patch Antenna for Wi-Fi 6e Application

“…A beam steerable parasitic array antenna based on two embedded PIN diodes is reported in [21] for beam steering angles of +30 • , 0 • , and −30 • . Many parasitic element-based pattern reconfigurable patch antennas (PRPAs) discussed earlier have used a large number of ideal switches, and the investigation of beam steering is not reported with the implementation of practical RF switch in the fabrication [16,18,20]. The research gap related to beam steering patch antenna for Wi-Fi 6E band (5.925 GHz-6.425 GHz) application as found in extensive literature survey is addressed in this article.…”

“…Switching of MEMS switches between the driven and parasitic patches results in reconfigurable major lobe orientation in the H-plane at +17 • , −25.8 • , +3.5 • , and +0.7 • . In [18], a pattern reconfigurable antenna capable of changing its radiation pattern from omnidirectional to directional mode, with the help of two arc-shaped parasitic stubs placed on the back side of the antenna is demonstrated for WLAN and WiMAX applications. The reconfigurable antenna reported in [19] uses single feed line to excite two rotatable patches through PIN diode switches.…”

Parasitic Array Based Radiation Pattern Reconfigurable Patch Antenna for WLAN Application

“…PIN diodes and all components of DC biasing circuitry are mounted on the ground plane to minimize possible disturbances in the radiated fields of the antenna. Unlike the beam steerable antennas reported for WLAN application in [15][16][17][18][19] which are able to reconfigure their radiation pattern either in H-plane or Eplane, pattern reconfiguration in both planes (E and H) are achieved in the proposed antenna. Enhancement of beam steering capability in terms of beam tilt angle and steering direction is the additional advantage of the proposed pattern reconfigurable patch antenna (PRPA).…”

“…The antenna employs large number of PIN diodes along with a DC biasing circuitry consisting large number of inductors and capacitors, which increases its complexity. An antenna with pattern reconfigurability for WLAN and WiMAX application is reported in [15]. Two parasitic stubs along with four ideal switches in the ground plane perform the function of reflector to switch the H-plane radiation pattern from omnidirectional to a directional mode.…”