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A coplanar waveguide fed monopole ultra-wideband antenna with triple subband notched characteristics and small volume (23 × 29 × 0.8 × mm3) is presented. The proposed antenna yields impedance bandwidth of 3.1-10.6-GHz with return loss S11-10-dB, except for the three subbands of 3.3-3.7-GHz for WiMAX, 5.15-5.825-GHz for WLAN and 7.25-7.75-GHz for the downlink of X-band satellite communication systems...
A modified helix chip antenna is presented for WiBro and WLAN applications. The impedance and radiation characteristics of the antenna are investigated. The antenna is formed on both sides of the substrate (3.5 times 8 times 0.8 mm, FR4). The measured results show that the proposed antenna has a bandwidth of 290 MHz (2.26-2.55 GHz) and a maximum radiation gain of 1.468 dBi.
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