Title :
Fence loaded antenna coupler for high-band UWB with steep cutoff characteristics
Author :
Saito, Isao ; Kohira, Kaoru ; Ishikuro, Hiroki
Author_Institution :
Dept. of Electron. & Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
This paper presents a fence-type virtual short stub loaded UWB antenna coupler which has broadband and steep cutoff characteristics at both the lower and upper cutoff frequency. The fence-type short stub consists of a top and bottom metal layers of FR4 substrate and Through Holes (THs) connecting layers. Thanks to this geometry, resonance and anti-resonance occur at various frequencies in several signal paths. The size of the antenna is 1cm × 1cm. The simulation result of coupling coefficient parameter (S21) is higher than -20dB from 6.2GHz to 10.4GHz (4.2GHz bandwidth) when the distance between two couplers is 1cm.
Keywords :
microwave antennas; substrate integrated waveguides; ultra wideband antennas; waveguide couplers; FR4 substrate; bandwidth 4.2 GHz; bottom metal layers; fence-type virtual short stub loaded UWB antenna coupler; frequency 6.2 GHz to 10.4 GHz; high-band UWB; lower cutoff frequency; steep cutoff characteristics; through holes connecting layers; top metal layers; upper cutoff frequency; Bandwidth; Couplers; Cutoff frequency; Geometry; Resonant frequency; Ultra wideband antennas; Couplers; Loaded antennas; Scattering parameters; Ultra wideband antennas;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2015 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/RWS.2015.7129752
