Title :
Compact microstrip patch balun filter
Author :
Ng, C.H. ; Lim, E.H. ; Leung, K.W.
Author_Institution :
Agilent Technol. Sdn. Bhd., Kerteh, Malaysia
Abstract :
A compact and planar balun filter made of a microstrip square patch resonator is proposed. By cutting an inclined crossed slot at the center of the patch, two poles can be introduced to the passband. In the design, the patch is capacitively coupled to the outputs through two C-shaped feedlines. Two transmission zeros are also found in one of the filtering passbands, increasing the frequency selectivity of the system. Both the filter and balun parts are studied theoretically and the results are verified by measurements.
Keywords :
antenna feeds; baluns; band-pass filters; microstrip filters; microstrip resonators; C-shaped feedlines; compact microstrip patch balun filter; frequency selectivity; microstrip square patch resonator; passband filter; planar balun filter; transmission zeros; Prototypes; Resonant frequency; Substrates; Wireless communication; balun; bandpass filter; filter; microstrip patch; multifunction;
Conference_Titel :
Cross Strait Quad-Regional Radio Science and Wireless Technology Conference (CSQRWC), 2011
Conference_Location :
Harbin
Print_ISBN :
978-1-4244-9792-8
DOI :
10.1109/CSQRWC.2011.6037050
