Title :
Ferrite-Loaded SIW Bowtie Slot Antenna With Broadband Frequency Tunability
Author :
Li-Rong Tan ; Rui-Xin Wu ; Cong-Yi Wang ; Yin Poo
Author_Institution :
Sch. of Electron. Sci. & Eng., Nanjing Univ., Nanjing, China
Abstract :
We present a novel approach to realize broadband frequency tunability of ferrite-loaded substrate integrated waveguide (SIW) antennas by simultaneously changing the location of ferrite slabs in the antennas (mechanical tuning) and bias magnetic fields (magnetical tuning). The proposed method is verified by the antenna designed in X-band with experiments. The measurements show that the antenna has frequency tuning range over 14.94% (9.23-10.69 GHz) and gains over 5 dBi. The radiation pattern of the antenna changes little in tunings, showing a good property for tunable antennas.
Keywords :
antenna radiation patterns; bow-tie antennas; ferrite-loaded waveguides; microwave antennas; slot antennas; substrate integrated waveguides; bias magnetic fields; broadband frequency tunability; ferrite-loaded SIW bowtie slot antenna; ferrite-loaded substrate integrated waveguide antennas; frequency tuning range; radiation pattern; Broadband antennas; Cavity resonators; Ferrites; Resonant frequency; Slabs; Tuning; Broadband frequency tunability; ferrite; magnetically tunable antenna; mechanically tunable antenna; reconfigurable antenna; substrate integrated waveguide (SIW);
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2305431
