Impedance characteristics of microstrip antennas excited by coplanar waveguides with inductive or capacitive coupling slots

Author

Deng, Sheng-Ming ; Wu, Ming-Dong ; Hsu, Powen

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan

Volume

5

Issue

11

fYear

1995

fDate

11/1/1995 12:00:00 AM

Firstpage

391

Lastpage

393

Abstract

A rectangular microstrip antenna fed by a coplanar waveguide with an inductive or a capacitive coupling end slot is analyzed by using the moment method. Numerical calculations for the input impedances are shown to agree well with those of the measurements. For the purpose of design, a parameter study for the variations of input impedance with length and width of the coupling slot is presented. Differences in the input impedance characteristics between the inductive and capacitive coupling cases are also discussed

Keywords

antenna feeds; antenna theory; coplanar waveguides; electric impedance; method of moments; microstrip antennas; slot antennas; capacitive coupling slots; coplanar waveguide feed; inductive coupling slots; input impedance; moment method; rectangular microstrip antenna; Antenna measurements; Clocks; Coplanar waveguides; Frequency; Impedance measurement; Microstrip antennas; Millimeter wave technology; Moment methods; Rectangular waveguides; Slot antennas;

fLanguage

English

Journal_Title

Microwave and Guided Wave Letters, IEEE

Publisher

ieee

ISSN

1051-8207

Type

jour

DOI

10.1109/75.473532

Filename

473532