Directional coupler

Details Directional coupler Directional coupler

H - Electricity

01

P

333/9

H01P 5/18 (2006.01)

Patent

CA 1082782

DIRECTIONAL COUPLER Abstract of the Disclosure A compact four-port two branch coupler preferably constructed in stripline or microstrip media having an input port and a pair of output ports. The equivalent admittance of a coupler has a real part (conductance) and imaginary part (susceptance), and known design techniques require the branch line electrical length .theta. to be .pi./2 or 90°, so that the device is properly matched. However, to reduce the physical line lengths at a predetermined operating frequency in accordance with the invention the electric- al length .theta. is chosen at a lower value of, for example, .pi./4 or 45° thereby reducing the line lengths of the branches making the device more compact. This choice now creates an inductive mismatch in the equivalent admittance which is easily compensated for by a capacitance at each junction in order to make the total susceptance zero so that the device is matched for .theta. = .pi./4. This is accomplished quite effectively with the capacitive sections being conveniently located in the central open area formed between the four strip networks defining the coupler.

279281

Affiliated with

Also associated with

Rating

Directional coupler does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Directional coupler, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Directional coupler will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-51591