Title :
High Directivity Quarter-Wave Microstrip Couplers with Periodic Floating-Conductors on Coupled Edges
Author :
Fujii, Takao ; Kokubo, Yoshihiro ; Ohta, Isao
Author_Institution :
Himeji Inst. of Technol., Hyogo Univ.
Abstract :
This paper presents a new quarter-wavelength microstrip coupler with high directivity, which consists of a periodic sequence of floating metal strips in the slots on the inner edges. After describing the characteristics of the coupled-line, a 15-dB coupler is designed and a high directivity of 30 dB or more in theory is obtained over a considerably wide bandwidth. The validity of the design concept is confirmed by em-simulations and experiments
Keywords :
microstrip directional couplers; microstrip lines; microwave circuits; coupled line; directional coupler; directivity; electromagnetic simulation; microstrip line; microwave circuit; periodic floating metal strips; periodic loading; quarter-wave microstrip coupler; Bandwidth; Conductors; Coupling circuits; Dielectric substrates; Directional couplers; Microstrip; Microwave integrated circuits; Microwave technology; Permittivity; Strips; Microstrip line; coupled lines; directional couplers; microwave circuits; periodically loading;
Conference_Titel :
Microwave Conference, 2006. 36th European
Conference_Location :
Manchester
Print_ISBN :
2-9600551-6-0
DOI :
10.1109/EUMC.2006.281174
