Title :
Empirical Formula of Cavity Dominant Mode Frequency for 60-GHz Cavity-Backed Wide Slot Antenna
Author :
Ke Gong ; Zhi Ning Chen ; Xianming Qing ; Zhe Song ; Peng Chen ; Wei Hong
Author_Institution :
State Key Lab. of Millimeter Waves, Southeast Univ., Nanjing, China
Abstract :
An empirical formula of the dominant mode resonant frequency of the cavity which is used to back a wide slot antenna is presented. The antenna is formed by etching a wide slot onto the broad wall of a substrate integrated waveguide (SIW) cavity fed by an SIW through an inductive coupling window. The widely slotted cavity resonates at the dominant mode when the wide slot radiates. Based on the analysis of the field distribution in the slotted-cavity, an empirical formula is derived to determine the dominant mode resonant frequency of the cavity with respect to the width to length ratio (WLR) of the etched slot. The empirical formula is numerically verified at a 60-GHz band.
Keywords :
slot antennas; substrate integrated waveguides; cavity backed wide slot antenna; cavity dominant mode frequency; dominant mode resonant frequency; etched slot; field distribution; frequency 60 GHz; inductive coupling window; slotted cavity resonates; substrate integrated waveguide cavity; Cavity resonators; Dielectric resonator antennas; Resonant frequency; Slot antennas; Substrates; Cavity-backed slot antenna; cavity mode; dual-resonance; substrate integrated waveguide (SIW);
Journal_Title :
Antennas and Propagation, IEEE Transactions on
DOI :
10.1109/TAP.2012.2223444
