DocumentCode
3187747
Title
Ultra-broadband high-directivity directional coupler design
Author
Bickford, J.D. ; Branner, G.R.
Author_Institution
California Univ., Davis, CA, USA
fYear
1988
fDate
25-27 May 1988
Firstpage
595
Abstract
The theory and design of ultrabroadband high-directivity tapered-line directional couplers are discussed. Causes of imperfect directivity are examined from both a theoretical and experimental standpoint. This includes the effects of nonunity VSWR terminations and internal connections, unequal even-mode and odd-mode velocities, and unequal even-mode and odd-mode attenuation constants. Practical considerations in the design of asymmetrical tapered couplers are discussed. A design example is presented which displays a bandwidth that is believed to be approximately 1.7 octaves greater than any other coupler of comparable directivity.<>
Keywords
directional couplers; asymmetrical tapered couplers; directional coupler design; even mode attenuation constant; even mode velocity; high-directivity; imperfect directivity; internal connections; nonunity VSWR terminations; odd-mode attenuation constants; odd-mode velocities; tapered-line; ultrabroadband; Attenuation; Bandwidth; Couplings; Degradation; Directional couplers; Displays; Instruments; Modems; Reflection; Termination of employment;
fLanguage
English
Publisher
ieee
Conference_Titel
Microwave Symposium Digest, 1988., IEEE MTT-S International
Conference_Location
New York, NY, USA
Type
conf
DOI
10.1109/MWSYM.1988.22105
Filename
22105
Link To Document