A magic tee (or magic T or hybrid tee) is a hybrid or 3 dB coupler used in microwave systems. It is an alternative to the rat-race coupler. In contrast to the rat-race, the three-dimensional structure of the magic tee makes it less readily constructed in planar technologies such as microstrip or stripline.
The magic tee was originally developed in World War II, and first published by W. A. Tyrell (of Bell Labs) in a 1947 IRE paper. Robert L. Kyhl and Bob Dicke independently created magic tees around the same time.
Famous quotes containing the word magic:
“I revere the memory of Mr. F. as an estimable man and most indulgent husband, only necessary to mention Asparagus and it appeared or to hint at any little delicate thing to drink and it came like magic in a pint bottle; it was not ecstasy but it was comfort.”
—Charles Dickens (1812–1870)