Title :
Loss evaluation of post-wall waveguides and its effect on antenna efficiency in millimeter-wave bands
Author :
She, Yuanfeng ; Hirokawa, Jiro ; Ando, Makoto
Author_Institution :
Dept. of Electr. & Electron. Eng., Tokyo Inst. of Technol., Tokyo, Japan
Abstract :
Loss evaluation has been done on various transmission lines for the purpose of a precise antenna design in millimeter-wave bands. The transmission losses have been estimated per unit length by measuring the losses of microstrip lines and post-wall waveguides on substrates with different thickness in different wavebands. Compared the experimental losses with the simulated results, the frequency dependence of the effective conductivity and the complex permittivity obtained by a whispering gallery mode resonator method are quantitatively confirmed. The effects of the transmission loss on the antenna efficiency as well as other loss factors are discussed by measurements with different sizes of post-wall waveguide-fed parallel plate slot arrays.
Keywords :
antenna feeds; microstrip lines; millimetre wave antenna arrays; parallel plate waveguides; slot antenna arrays; antenna design; antenna efficiency; complex permittivity; loss evaluation; microstrip lines losses; millimeter wave bands; post wall waveguide fed parallel plate slot arrays; post-wall waveguides; post-wall waveguides losses; transmission losses; whispering gallery mode resonator method; Antenna measurements; Length measurement; Loss measurement; Measurement units; Millimeter wave measurements; Millimeter wave technology; Permittivity measurement; Propagation losses; Transmission line antennas; Transmission line measurements; conductivity; microstrip; millimeter wave antennas; resonator; waveguide;
Conference_Titel :
Microwave Conference, 2009. APMC 2009. Asia Pacific
Conference_Location :
Singapore
Print_ISBN :
978-1-4244-2801-4
Electronic_ISBN :
978-1-4244-2802-1
DOI :
10.1109/APMC.2009.5385274
