Multisection Ultra-Broadband Directional Coupler Designed in MMIC Technology

IEEE Access

Krzysztof Wincza¹  Robert Smolarz¹  Slawomir Gruszczynski¹ 

[1] Department of Electronics, AGH University of Science and Technology, Krakow, Poland;

关键词: Multisection directional couplers;    ultra-broadband couplers;    microwave monolithic integrated circuit (MMIC);    unequal coupled-lines;    compensation method;    electrical performance improvement;   

DOI  :  10.1109/ACCESS.2021.3061384

来源: DOAJ

【 摘 要 】

An ultra-broadband multisection directional coupler designed in Monolithic Microwave Integrated Circuit (MMIC) technology has been presented. It has been shown for the first time that it is possible to achieve bandwidths exceeding one frequency decade, simultaneously taking under account technological constrains. The proposed directional coupler is composed of three coupled-line sections having different values of electrical lengths and coupling coefficients. The strongest coupled section has been designed as an asymmetric three-strip coupled-line section, whereas the rest of the sections have been implemented as symmetric two-strip coupled-line structures. To improve electrical performance of the coupler, a compensation method has been implemented together with loss analysis which has to be considered in lossy inhomogeneous medium. The proposed 3-dB directional coupler has been designed in PH25 process based on gallium arsenide (GaAs) from United Monolithic Semiconductors (UMS), and fabricated. The measurement confirms applicability of the design method in monolithic technology for such networks operating in bandwidth exceeding one frequency decade.

【 授权许可】

Unknown