Compact Dual Band Antenna for Sub-6GHz Applications

In this paper a coplanar waveguide (CPW) fed, compact planar antenna having the dimension of 35mm×30mm is developed and analyzed for the dual band applications. Symmetrical patch and ground plane are designed on a low cost FR4 epoxy substrate with the thickness of 0.8mm. Three slots of different dimensions are integrated on the triangular shaped patch to resonate the proposed antenna at required frequency bands. Antenna parameters like, reflection coefficient, gain, radiation efficiency and radiation pattern are analyzed for inspecting the antenna performance. For the simulation, CST microwave studio is used and simulated results shows impedance bandwidth of 810MHz (3.12-3.93GHz) and 410MHz (5.46-5.87GHz). Antenna shows omnidirectional radiation pattern in both resonating bands with gain variation between 2-3.5dBi and efficiency greater than 80%. All these characteristics ensures antenna's applicability in IEEE 802.16 WiMAX and IEEE 402.11n Wi-Fi (ISM) band.