A Novel Broadband Eighth-Wave Conical Antenna

• Published in: IEEE transactions on antennas and propagation Vol. 56; no. 7; pp. 2112 - 2116
• Main Authors: Palud, S., Colombel, F., Himdi, M., Le Meins, C.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.07.2008; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antenna radiation patterns; Antennas; Applied sciences; Bandwidth; Broadband; Broadband antenna; Broadband antennas; conical monopolar antenna; Dielectric substrates; Dielectrics; Exact sciences and technology; Feeds; Frequency; Gain; Ground plane; Impedance matching; omnidirectional radiation patterns; Polarization; Radiocommunications; Shape; Simulation; Telecommunications; Telecommunications and information theory; Three dimensional displays; Wavelengths; Performance evaluation; Conical antenna; Non directive antenna; Broadband antennas; Broadband antenna; conical monopolar antenna; Dielectric substrate; Impedance matching; Parasitic component; Wide band; Simulation; Standing wave ratio; Monopole antenna; Radiation pattern; omnidirectional radiation patterns
• ISSN: 0018-926X; 1558-2221
• DOI: 10.1109/TAP.2008.924775

A novel antenna is composed of a conical monopole with metallic parasitic elements and a capacitive disk placed above a ground plane. A dielectric substrate is used in order to optimize the performances. This antenna provides broadband characteristics and omnidirectional radiation patterns over the whole bandwidth with a height limited to a one eighth wavelength associated to the lowest frequency. Simulations and experiments demonstrate that this structure exhibits a 2.9:1 impedance bandwidth with VSWR below 2:1 and very good radiation patterns and gain in spite of a size extremely reduced.