摘要: The paper presents a small broadband monopole antenna. proposed structure consists of circular disk-loaded and probe with spiral strip line monopole. Broad bandwidth can be achieved through electromagnetic coupling between these two monopoles that generate resonances closely spaced in frequency. antenna occupies cylindrical volume radius /spl rho/ cong/ 0.04/spl lambda//sub o/ (5.5 mm) height h 0.08/spl (11 has 430 MHz impedance for VSWR<2 center frequency at 2.185 GHz, which is fractional approximately 19.7%. gain the more than 1.7 dBi within entire good omnidirectional radiation characteristics.
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