Printing;
Microwave theory and techniques;
Power transmission lines;
Impedance matching;
Bandwidth;
Fabrication;
Couplings;
High isolation;
magic tee;
ridged waveguide;
3-D printing;
waveguide component;
ANTENNAS;
COMPACT;
D O I:
10.1109/TMTT.2020.3006570
中图分类号:
TM [电工技术];
TN [电子技术、通信技术];
学科分类号:
0808 ;
0809 ;
摘要:
In this article, full-metal ridged waveguide magic tees are designed and fabricated based on 3-D printing technology. Two kinds of prototypes with different structures and performances are proposed and compared. First, a wideband design based on double-ridged waveguide (DRWG) transmission lines was proposed, and it achieved a measured operational bandwidth of 27%. However, this component has to be split into two parts that are printed separately and then assembled together by screws because the overhang structure cannot satisfy the 3-D printing rules. To overcome this problem, a novel magic tee based on pyramidal ridged waveguide (PRWG) is proposed. In spite of a narrower bandwidth of 8.6%, this design requires a simpler fabrication method and has a lower profile. To the best of our knowledge, the PRWG prototype is the first full-metal magic tee that is fabricated as a whole part without involving any assembling or tuning and, thus, saves processing time and manual work.