Size reduction of composite right/left handed transmission line and its application to the design of dual-band bandpass filter

Abstract

20] Byambaakhuu B, et al. Development of small-sized UWB antenna for binaural hearing AIDS. Microwave Opt Technol Lett. 2015;57(8):1883-1889. [21] Tofighi, Mohmmad-Reza. "Characterization of biomedical antennas for microwave heating, radiometry, and implant communication applications. In: "IEEE 12th Annual Wireless and Microwave Technology Conference (WAMICON), 2011 [22] Klemetsen Ø, Jacobsen S. Improved radiometric performance attained by an elliptical microwave antenna with suction. IEEE Trans Biomed Eng. 2012;59(1):263-271. How to cite this article: Byambaakhuu B, Nyamsuren P, Park R-, Cheon C. Monostatic radiometry system for temperature measurement during RF hyperthermia treatment. Microw Opt AbstractThis article presents a method that chooses appropriate phase size to reduce the size of a composite right/lefthanded (CRLH) transmission line. A reduced-size dualband bandpass filter was designed and fabricated to demonstrate the proposed CRLH line, and the wide dualpassband characteristics are obtained by implementing a dual-band J-inverter as the coupling between 2 CRLHresonators. A defected ground structure is adopted to obtain the line with a high characteristic impedance for the J-inverter. The designed dual-wideband bandpass is validated by conducting experiments and obtaining measures of its performance. The results show that the 2 passbands are centered at 2.4 GHz and 5.2 GHz, with a 3-dB fractional bandwidth of 33.75% and 38.46%, respectively. In addition, this filter has low insertion losses of 0.21 dB and 0.5 dB for each passband. K E Y W O R D S defected ground structure, dual-band J-inverter, dual wide bandwidth, reduced composite right/left-handed transmission line

Compact Dual-Wideband Bandpass Filter Using CSRR Based Extended Right/Left-Handed Transmission Line

“…Meander loop resonator [2], stepped impedance resonator [3,4], and microstrip open loop resonator [5] are used as multi-mode resonators in this type of filters. Recently, metamaterial based composite right/left-handed (CRLH) transmission line has introduced a new method for designing and miniaturizing multiband microwave devices due to its unique phase response [6]. Moreover, CRLH transmission line is utilized in designing a single wideband bandpass filter [7][8][9][10].…”