The excitation or coupling of microwave integrated circuits to a cavity or resonator is effected by a substrate forming part of the wall of the cavity and on which there is disposed a microstrip or a strip or a slot line....http://www.google.fr/patents/US4211987?utm_source=gb-gplus-shareBrevet US4211987 - Cavity excitation utilizing microstrip, strip, or slot line
Cavity excitation utilizing microstrip, strip, or slot line
