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

fYear

2009

fDate

7-10 Dec. 2009

Firstpage

2041

Lastpage

2044

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/APMC.2009.5385274

Filename

5385274