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A ultra-wide-band (UWB) filter with passband from 3.1 to 10.6 GHz based on stepped impedance resonator (SIR) and interdigital coupled-line techniques is presented in this letter for use in wireless communication applications. The characteristics of stepped impedance resonator are studied and the relationship between SIR and Multi-mode resonator (MMR) is discussed. The skirts effect of the UWB filter...
In this letter, a patch antenna with folded arrowhead-shaped structure is proposed to extend impedance bandwidth, decrease size and enhance gain. The antenna is optimized, fabricated and measured. The measured results indicate that an impedance bandwidth of 85% with Sll<;-10 dB (5.1 GHz to 12.6 GHz) is obtained and the antenna gain fluctuates from 4.4 dBi to 6.6 dBi over the whole bandwidth. The...
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