Title :
Narrow-beam azimuthally omni-directional millimetre-wave antenna using freeformed cylindrical woodpile cavity
Author :
Lee, Youngjoo ; Lu, Xinyi ; Hao, Yuwen ; Yang, Songping ; Evans, J.R.G. ; Parini, Clive G.
Author_Institution :
Space Sci. & Technol. Dept., STFC Rutherford Appleton Lab., Didcot, UK
fDate :
10/1/2010 12:00:00 AM
Abstract :
A freeformed cylindrical electromagnetic bandgap (EBG) structure and its application for millimetre-wave antennas are presented. The cylindrical EBG structure is fabricated using the extrusion freeforming technique in which the design is downloaded directly to a building platform. The fabricated cylindrical woodpile exhibits bandgap characteristics around 95 GHz and is used for realising a resonant cavity antenna. The fabricated antenna achieves a narrow beam with 6.5 measured half-power beam-width in the elevation plane without using an array configuration. The overall antenna gain is approximately 5 dBi at 94.2 GHz, suitable for future short-range gigabit wireless communications.
Keywords :
cavity resonators; millimetre wave antennas; photonic band gap; EBG structure; antenna gain; elevation plane; freeformed cylindrical electromagnetic bandgap; freeformed cylindrical woodpile cavity; frequency 94.2 GHz; half-power beamwidth; narrow-beam azimuthally omnidirectional millimetre-wave antenna; resonant cavity antenna; short-range gigabit wireless communications;
Journal_Title :
Microwaves, Antennas & Propagation, IET
DOI :
10.1049/iet-map.2009.0224
