Title :
Microstrip to coplanar strip double-Y balun with very high upper frequency limitation
Author :
Ma Ruyu ; Fu Jiahui
Author_Institution :
Microwave Eng. Lab., Harbin Inst. of Technol., Harbin, China
Abstract :
Double-Y balun is a kind of printed balun with ultra wide bandwidth, which can also realize transformation from different sorts of printed transmission lines and has been widely used in wideband mixer and ultra-wideband antennas. This paper researched on some elements that influent the upper frequency limitation of double-Y balun in practical engineering and presented a design of double-Y balun transition from microstrip line to coplanar strip line (CPS) with pass band up to 18GHz. The design also included a Microstrip impedance transformer as this design is to feed a 100Ω vivaldi antenna. The VSWR of whole component was less then 1.5 and insert loss 2dB in a bandwidth of over 1: 18.
Keywords :
baluns; coplanar waveguides; impedance convertors; microstrip lines; coplanar strip double-Y balun; coplanar strip line; loss 2 dB; microstrip impedance transformer; microstrip line; microstrip strip double-Y balun; printed balun; printed transmission lines; ultra wide bandwidth; upper frequency limitation; Impedance; Impedance matching; Microstrip; Microwave antennas; Microwave circuits; Strips; Substrates; Double Y; Ku band; balun; coplanar strip line; coplanar strip line(CPS); microstrip line;
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.2014.6992788
