Title :
A 3-dB Directional Coupler for Microwave Integrated Circuits
Author :
Morris, James E.
fDate :
6/1/1968 12:00:00 AM
Abstract :
A procedure for designing quarter-wavelength 3-dB directional couplers is described which utilizes a perturbation technique to reduce the number of experimental models needed during the development. Limitations caused by unequal odd and even mode phase velocities and junction parasitics are discussed.The use of thin-film conductors on quartz and glazed ceramic gives a coupling accuracy better than 3.0 /spl plusmn/ 0.1 dB and an isolation greater than 32 dB with worst-case tolerances.
Keywords :
Coupling circuits; Microwave circuits; Ceramics; Conductors; Coupling circuits; Directional couplers; Frequency; Geometry; Impedance measurement; Integrated circuit measurements; Microwave integrated circuits; Pulse measurements;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1968.1049857
