Adjusting the slot width in a slot antenna can determine the operating
frequency bandwidth. In order to obtain a wider radiation beamwidth,
a narrower slot width is needed. This paper uses a CPW tuning stub in
the CPW-fed slot antenna to achieve this goal. (C) 1998 John Wiley & S
ons, Inc. Microwave Opt Technol Lett 19: 257-258, 1998.