No abstract

Conical and cylindrical dielectric resonator elements are vertically stacked and excited by a simple coaxial monopole. Compared to all earlier configurations, the proposed geometry significantly improves the impedance bandwidth. The ultrawideband response is enhanced due to the multiple resonances occurring by the suggested hybrid antenna. The footprint area of the antenna is only 63.6 mm 2 or 25.44×10 −3 λ 2 o at the lowest operating frequency. The performance of the antenna is verified experimentally and numerically. Presented results show that the proposed hybrid monopole-DRA has a measured impedance bandwidth up to 148.6% (S 11 < −10 dB) along with consistent monopole-like radiation patterns and peak gain of 7.14 dBi. With such properties, the proposed hybrid monopole-DRA can be used in different ultra-wideband wireless applications and as wideband electromagnetic interference (EMI) sensors.

Abstract-A new very compact open slot antenna for wireless communication systems application has been designed and fabricated. With antenna overall dimension of 9.2 × 9.8 mm 2 , the proposed design can be used in many modern communication devices with size constraints. Experimental measurements have also been performed to validate the performance of the proposed antenna. The measured results show that the antenna provides a wide bandwidth of 48% (5-8.17 GHz) with an average size reduction of about 88% with respect to a conventional microstrip patch antenna.

No abstract