Title :
Matching slot role in bandwidth enhancement of SIW cavity-backed slot antenna
Author :
Varnoosfaderani, Mohammad Vatankhah ; Junwei Lu ; Boyuan Zhu
Author_Institution :
Queensland Micro- & Nanotechnol. Centre, Griffith Univ., Nathan, QLD, Australia
Abstract :
A substrate-integrated waveguide (SIW) cavity-backed antenna with two slots on top of the cavity has been proposed in this paper. The bowtie slot is the main radiator of the cavity and a rectangular slot close to the feed point has been etched (to add extra resonance to enhance the bandwidth of the antenna in the desired frequency range). Tuning the rectangular slot improved the fractional bandwidth to 8%. A 7.9 dBi peak gain and a steady beam over the entire bandwidth are achieved. The FTBR (front to back ratio) of the antenna is more than 20 dBi. A standard PCB producing process has been used in order to manufacture the proposed antenna on a single layer substrate.
Keywords :
antenna feeds; bow-tie antennas; printed circuits; slot antennas; substrate integrated waveguides; waveguide antennas; FTBR; PCB producing process; SIW cavity-backed slot antenna; bandwidth enhancement; bowtie slot; cavity radiator; feed point; front-to-back ratio; gain 7.9 dB; peak gain; rectangular slot; substrate-integrated waveguide cavity-backed antenna; Antenna measurements; Bandwidth; Cavity resonators; Feeds; Slot antennas; Substrates; bowtie; cavity-backed; matching slot; slot antenna; substrate-integrated waveguide (SIW);
Conference_Titel :
Antennas and Propagation (APCAP), 2014 3rd Asia-Pacific Conference on
Conference_Location :
Harbin
Print_ISBN :
978-1-4799-4355-5
DOI :
10.1109/APCAP.2014.6992464
