Title :
A Free-formed EBG resonator antenna at millimeter wave frequencies
Author :
Lee, Yoonjae ; Zhao, Yan ; Hao, Yang ; Parini, Clive G.
Author_Institution :
Dept. of Electron. Eng., Univ. of London, London
Abstract :
Electromagnetic bandgap structures (EBG) finds increasing number of applications in antennas and microwave devices. In this paper, we present an EBG resonator antenna based on woodpile structure at millimeter frequency. The dispersion characteristics of the woodpile structures have been analyzed using 3D FDTD codes with a periodic boundary condition (PBC). An annular slot antenna is used as the radiating element at 93 GHz. For the construction of the woodpile structure, we use alumina rods (epsivr = 9.6) with 0.4 mm diameter. A new method is employed for the fabrication of the woodpile using extrusion freeforming technique. The freeforming technique is very useful to construct complicated 3D structures. The designed EBG antenna shows improved directivities. At 93 GHz, directivity of 18 dBi has been achieved, which is approximately 11 dB improvement for the original antenna.
Keywords :
antennas; finite difference time-domain analysis; photonic band gap; resonators; 3D FDTD codes; annular slot antenna; dispersion characteristics; electromagnetic bandgap structures resonator antenna; extrusion freeforming; microwave devices; millimeter wave frequencies; periodic boundary condition; woodpile structure; Boundary conditions; Finite difference methods; Frequency; Metamaterials; Microwave antennas; Microwave devices; Millimeter wave devices; Millimeter wave technology; Periodic structures; Time domain analysis;
Conference_Titel :
Antennas and Propagation, 2006. EuCAP 2006. First European Conference on
Conference_Location :
Nice
Print_ISBN :
978-92-9092-937-6
DOI :
10.1109/EUCAP.2006.4584980
