Design and Simulation of Difierent Types of Meander Line Antennas with Improved E-ciency

The advent of new technology in communication systems and widespread use of this technology, leads engineers to design cheaper and simpler communication equipments. One of the most usage aspect of communication fleld is WLAN and RFID systems. Antenna is an inseparable part of these systems. Meander line antenna is the most usage of antenna that use in design of these applications. Classic meander line antenna has low e-ciency in some aspects, such as antenna bandwidth and operation in only one resonance frequency (single band). In this present various kind of these antennas have been proposed, to get better characteristics and e-ciency such as log periodic meander line antenna, meander line antenna with difierent length of vertical segment and symmetrical meander line antenna.