Telecommunications Technological Center of Catalonia CTTC Pavel Miskovsky

Telecommunications Technological Center of Catalonia (CTTC) Pavel Miskovsky Ph. D. candidate Sept. - 2005

UWB Antennas New facilities “Parc Mediterrani de la Tecnologia” ü 3. 500 m 2 building ü 3 floors (970 m 2 each for utilization) ü Offices, meeting rooms, training room, labs and workshops, terrace for antenna use 2 / 14

UWB Antennas ü FCC definition Ø Fractional bandwidth≥ 20% or >500 MHz absolute bandwidth Ø 3. 1 GHz – 10. 6 GHz ØAntenna Requirements: Ø Ø Ø Low cost Easy to integrate Small size Wide-band Omnidirectional üShort pulses [ns] ØNo carrier ØGaussian shape and derivates ØWithout DC component Ø CTTC Approach: Ø Ø Ø Planar technology Double-sided Technology Self-Complementary Bow-tie based topology 3 / 14

UWB Antennas Antenna Subsystem Matching Technologies Microstrip To Double-Sided Matching/ Filtering Network Double-Sided Matching impedance Filtering Radiating Unit Double-Sided Bow-tie Shaped Exploring the potential of double-sides technology in terms of impedance matching, gain and polarization 4 / 14

UWB Antennas Antenna, matching network and technology transformer -Bow-tie shaped antenna with a circle tangent to a 90 deg triangle - feedline width optimized 5 / 14

UWB Antennas Measurements 6 / 14

UWB Antennas Measured radiations patterns, E-plane (xy) copolar crosspolar 7 / 14

UWB Antennas Transfer function dependence on frequency and relative orientation (E-plane) between two identical antennas 8 / 14

UWB 50 cent antenna 0 Measure HFSS simulation Return Losses (d. B) -5 -10 -15 -20 -25 -30 2 4 6 8 10 12 GHz UWB (3. 1 -10. 6 GHz) 9 / 14