Broadside Radiation From a Planar 2-D Leaky-Wave Antenna by Practical Surface-Wave Launching

A planar 2-D leaky-wave (LW) antenna, capable of broadside radiation, is presented for millimeter wave applications. A directive surface-wave launcher (SWL) is utilized as the antenna feed exciting cylindrical surface-waves (SWs) on a grounded dielectric slab (GDS). With the addition of a segmented...

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Veröffentlicht in:	IEEE antennas and wireless propagation letters 2008, Vol.7, p.517-520
Hauptverfasser:	Podilchak, S.K., Freundorfer, A.P., Antar, Y.M.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Antenna feeds Antenna measurements Aperture antennas Dielectrics Directive antennas Gratings Leaky wave antennas Leaky-wave (LW) leaky-wave antenna (LWA) Millimeter wave measurements Slabs surface-wave (SW) surface-wave launcher (SWL) Tellurium
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Beschreibung
Zusammenfassung:	A planar 2-D leaky-wave (LW) antenna, capable of broadside radiation, is presented for millimeter wave applications. A directive surface-wave launcher (SWL) is utilized as the antenna feed exciting cylindrical surface-waves (SWs) on a grounded dielectric slab (GDS). With the addition of a segmented circular strip grating, cylindrical LWs can be excited on the antenna aperture. Measurements illustrate maximum gain at broadside at 19.48 GHz in both the E and H planes with a 10deg half power beamwidth. Specifically, a directive pencil beam is observed just at the edge of the TE 1 SW mode cuttoff frequency of the slab (19.47 GHz), suggesting maximum radiation at the edge of a TE stopband.
ISSN:	1536-1225 1548-5757
DOI:	10.1109/LAWP.2008.2006768