Jm. Carroll et al., SLOT COUPLING OF COPLANAR WAVE-GUIDE TO PATCH ANTENNAS SUITABLE FOR MMIC APPLICATIONS, Electronics Letters, 30(15), 1994, pp. 1195-1196
A new design for coupling coplanar waveguide (CPW) to microstrip anten
nas has been developed. The coupling method consists of direct apertur
e coupling from the coplanar waveguide feed to the microstrip antenna.
The advantage of this method is the use of a single substrate for the
entire CPW and antenna circuit as opposed to previous methods of coup
ling in which multilayer substrates were used.