Title :
Microstrip-fed circular substrate integrated waveguide (SIW) cavity resonator and antenna
Author :
Smith, Nathan A. ; Abhari, Ramesh
Author_Institution :
Dept. of ECE, McGill Univ., Montreal, QC, Canada
Abstract :
A new SlW-based circular cavity resonator is proposed which is excited by a microstrip line and a via probe. This SIW cavity component is evaluated as a resonator (for usage in electronic circuits like a VCO) and as a cavity-backed antenna, due to the slot created on the top surface of the cavity for the feed line. The resonator has a simulated gain of over 5dB at 16.13GHz when used as an antenna. The maximum antenna gain at 16.79GHz is measured to be 7.76dB for the fabricated prototype. Also, at the resonance frequency a very low reflection coefficient, better than -35dB, and a quality factor of approximately 76.3 are measured for the SIW cavity. The measured radiation patterns differ from the simulated patterns due to misalignments and errors in the fabrication, which, along with other junction and connector discontinuities, contributed to the differences between the measured and simulated input Q and impedance profiles.
Keywords :
Q-factor; antenna feeds; antenna radiation patterns; cavity resonators; microstrip antennas; microstrip lines; substrate integrated waveguides; Q factor; SIW cavity resonator; cavity-backed antenna; frequency 16.13 GHz; frequency 16.79 GHz; gain 7.76 dB; microstrip line; microstrip-fed circular substrate integrated waveguide cavity resonator; quality factor; radiation patterns; reflection coefficient; resonance frequency; Antenna measurements; Bandwidth; Cavity resonators; Frequency measurement; Microstrip; Q factor; Resonant frequency;
Conference_Titel :
Antennas and Propagation Society International Symposium (APSURSI), 2010 IEEE
Conference_Location :
Toronto, ON
Print_ISBN :
978-1-4244-4967-5
DOI :
10.1109/APS.2010.5562109
