DocumentCode :
1433089
Title :
Filter-Antenna Module Using Substrate Integrated Waveguide Cavities
Author :
Nova, Omar A. ; Bohórquez, Juan C. ; Peña, Néstor M. ; Bridges, Greg E. ; Shafai, Lotfollah ; Shafai, Cyrus
Author_Institution :
Dept. of Electr. & Electron. Eng., Los Andes Univ., Bogota, Colombia
Volume :
10
fYear :
2011
fDate :
7/3/1905 12:00:00 AM
Firstpage :
59
Lastpage :
62
Abstract :
A design procedure for filter-antenna modules based on substrate integrated waveguide cavities is presented in this letter. The filter-antenna module is modeled as an asynchronously tuned coupled-resonator circuit in which the last resonator also contains the radiating element. The design of the filter-antenna module is based on the classical process applied to obtain filters through the use of coupled resonators. The designed filter-antenna module is manufactured and measured, obtaining the following: a central frequency (fo) of 1.94 GHz, a -3-dB fractional band- width (FBW) of 5.57%, a gain (G) of 4.87 dBi, a front-to-back ratio (FTBR) of 25.60 dB, and a co-to-cross-polarization ratio of 22.86 dB in the direction of maximum radiation. The integration of the filter and the antenna into just one module leads to a reduction of size and weight in the RF front-end, while the implementation by means of the substrate integrated waveguide technique makes the integration with planar circuits easier.
Keywords :
UHF antennas; UHF filters; UHF resonators; antenna radiation patterns; substrate integrated waveguides; FBW; FTBR; RF front-end; asynchronously tuned coupled-resonator circuit; filter-antenna module; fractional bandwidth; frequency 1.94 GHz; front-to-back ratio; planar circuits; substrate integrated waveguide cavities; Antennas; Cavity resonators; Couplings; Metallization; Microwave filters; Resonator filters; Substrates; Bandpass filters; coupled-resonator circuits; filter-antenna modules; slot antennas; substrate integrated waveguide (SIW);
fLanguage :
English
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
Publisher :
ieee
ISSN :
1536-1225
Type :
jour
DOI :
10.1109/LAWP.2011.2107724
Filename :
5699330
Link To Document :
بازگشت