This paper presents a novel, compact Ultra Wide
Band , Asymmetric Ring Rectangular Dielectric Resonator
Antenna (ARRDRA), which is a unique combination of Thin
Dielectric Resonator (DR), Fork shape patch and defective
ground structure. The base of the proposed antenna is its Hybrid
structure, which generates fundamental TM, TE and higher order
modes that yields an impedance bandwidth of 119%. Proposed
antenna provides a frequency range from 4.2 to 16.6 GHz with a
stable radiation pattern and low cross polarization levels. Peak
gain of 5.5 dB and average efficiency of 90% is obtained by the
design. Antenna is elongated on a FR4 substrate of dimension 20
x 24x 2.168 mm3 and is particularly suitable for C band INSAT,
Radio Altimeter, WLAN, Wi-Fi for high frequencies. Ease in
fabrication due to simplicity, compactness, stable radiation
pattern throughout the entire bandwidth are the key features of
the presented design. Inclusion of Defective ground structure and
asymmetric ring not only increases the bandwidth but also
stabilize the gain and efficiency due to less surface current.
Presented design launch an Ultra Wide Band antenna with
sufficient band rejection at 4.48-5.34 and 5.64-8.33 GHz with
stable radiation pattern and high gain.
Dual Strip-Excited Dielectric Resonator Antenna with Parasitic Strips for Radiation Pattern Reconfigurability
