Frequency‐agile ring resonator end‐loaded slot antenna

Split-ring resonator loaded miniaturised slot for the slotted waveguide antenna stiffened structure

Broadband Annular-Ring Dielectric Resonator Antenna

Wideband Rectangular Dielectric Resonator Antenna (dra) with Slot-fed Design

A novel wideband rectangular dielectric resonator antenna (DRA) is proposed in this paper. A hybrid structure with an isolated dielectric resonator (DR) and an equivalent air-dielectric DR is introduced by lifting the resonator from the ground plane. The hybrid structure is excited by a slot-fed mechanism to obtain a smooth transition between each resonant mode. The resonant modes of the isolat...

Circularly Polarized Square Ring Slot Antenna with Arrow-Shaped Structure

© 2009 ETRI Journal, Volume 31, Number 5, October 2009 A novel design of a compact square-ring slot microstrip antenna for achieving circular polarization (CP) operation is proposed and experimentally studied. By using an arrow-shaped slot structure as a radiating element, the resonant frequency of the proposed antenna is significantly lowered, which can lead to a large size reduction for fixed...

Wideband double-element ring slot antenna - Electronics Letters

Introduction: Annular ring slot antennas are considered to be among the narrowband resonant antennas and occupy an area of l=4p at their first resonance [1]. Multi-element concentric ring slots have been used to design multi-band antennas [2]. However, because of transmission zeros that exist between the different resonances, these resonances cannot easily be merged to obtain a wideband respons...