Planar multi-band monopole antenna for WLAN/WiMAX applications

Abstract

A novel compact design of planar multi-band monopole antenna for WLAN/WiMAX system is proposed. By insetting a pair of mirrored L-shaped monopole strips, multi resonant modes close to 2.45 / 3.5 / 5.5 GHz band are excited to meet the specifications of WLAN/WiMAX system. The obtained impedance bandwidth across the operating bands can reach about 160 / 1100 / 2690 MHz for the 2.45 / 3.5 / 5.5 GHz bands, respectively. Only with the antenna size of 30 × 42 × 0.8 mm 3 , the proposed monopole antenna has the compact operation with more than 20% antenna size reduction. The measured peak gains and radiation efficiencies are about 3.2 / 3.5 / 5.4 dBi and 72 / 98 / 96% for the 2.45 / 3.5 / 5.5 GHz band, respectively, with nearly omni-directional pattern in the XY-plane.

Compact Tri-band Loaded Antenna for wireless Communication and Fifth generation Applications

“…One common multiband technique involves stimulating the antenna using various feeds, [7] including microstrip and coaxial probes. Modifying the geometry of the ground and patches, such as the ground plane's splits or gaps Applications for dual frequency antennas include synthetic aperture radar, [8][9][10] satellite communications, global positioning systems, and personal communications systems. [11] In order for multiband antennas to work with monolithic microwave integrated circuits, coplanar waveguide must be used as the antenna feed.…”

Design of triple band antenna with improved gain and low profile using triple band artificial magnetic conductor

“…With the development of wireless communication technology, more and more multi-band wireless communication systems have been attracting attention. Multi-band antennas can be obtained by the design method of etching slots [1] and adding parasitic coupling elements [2]; And the method of multi-branch coordination [3] can also be utilized, where each branch corresponds to a resonant frequency, the fractal iteration technique [4] is also a method to achieve multiband antenna design. Previous approaches for designing multi-band antenna show the advantages of simple structure and individually adjustable frequency, but the radiation performance of these antennas does not meet the requirements of communication.…”

Stacked T-Shaped Strips Compact Antenna for WLAN and WiMAX Applications

“…The literature details various dual and multiband antennas [9][10][11][12][13][14][15][16][17][18][19][20]. In [9], a pair of L-shaped strips are combined to obtain triple band operation.…”

“…Li et al [11] proposed a rectangular ring monopole antenna exhibiting triple band operation is designed using L-strips and inverted T-shaped stubs. In [12], L-Shaped strips on a 30 × 42 mm 2 substrate are used to obtain tri-band operation. Similarly, CPW fed slotted antenna with relatively larger dimension has been proposed in [13,14].…”